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3804 lines
140 KiB
JavaScript
3804 lines
140 KiB
JavaScript
/* Javascript plotting library for jQuery, version 0.9.0-alpha.
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Copyright (c) 2007-2014 IOLA and Ole Laursen.
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Licensed under the MIT license.
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*/
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(function($) {
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// A jquery-esque isNumeric method since we currently support 1.4.4
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// and $.isNumeric was introduced on in 1.7
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var isNumeric = $.isNumeric || function(obj) {
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return obj - parseFloat( obj ) >= 0;
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};
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/**
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* The Canvas object is a wrapper around an HTML5 <canvas> tag.
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*
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* @constructor
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* @param {string} cls List of classes to apply to the canvas.
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* @param {element} container Element onto which to append the canvas.
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*
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* Requiring a container is a little iffy, but unfortunately canvas
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* operations don't work unless the canvas is attached to the DOM.
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*/
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function Canvas(cls, container) {
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var element = container.children("." + cls)[0];
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if (element == null) {
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element = document.createElement("canvas");
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element.className = cls;
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$(element).css({ direction: "ltr", position: "absolute", left: 0, top: 0 })
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.appendTo(container);
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// If HTML5 Canvas isn't available, fall back to [Ex|Flash]canvas
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if (!element.getContext) {
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if (window.G_vmlCanvasManager) {
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element = window.G_vmlCanvasManager.initElement(element);
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} else {
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throw new Error("Canvas is not available. If you're using IE with a fall-back such as Excanvas, then there's either a mistake in your conditional include, or the page has no DOCTYPE and is rendering in Quirks Mode.");
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}
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}
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}
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this.element = element;
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var context = this.context = element.getContext("2d"),
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// Determine the screen's ratio of physical to device-independent
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// pixels. This is the ratio between the canvas width that the browser
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// advertises and the number of pixels actually present in that space.
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// The iPhone 4, for example, has a device-independent width of 320px,
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// but its screen is actually 640px wide. It therefore has a pixel
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// ratio of 2, while most normal devices have a ratio of 1.
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devicePixelRatio = window.devicePixelRatio || 1,
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backingStoreRatio =
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context.webkitBackingStorePixelRatio ||
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context.mozBackingStorePixelRatio ||
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context.msBackingStorePixelRatio ||
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context.oBackingStorePixelRatio ||
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context.backingStorePixelRatio || 1;
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this.pixelRatio = devicePixelRatio / backingStoreRatio;
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// Size the canvas to match the internal dimensions of its container
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this.resize(container.width(), container.height());
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// Collection of HTML div layers for text overlaid onto the canvas
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this.textContainer = null;
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this.text = {};
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// Cache of text fragments and metrics, so we can avoid expensively
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// re-calculating them when the plot is re-rendered in a loop.
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this._textCache = {};
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}
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/**
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* Resizes the canvas to the given dimensions.
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*
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* @param {number} width New width of the canvas, in pixels.
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* @param {number} height New height of the canvas, in pixels.
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*/
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Canvas.prototype.resize = function(width, height) {
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if (width <= 0 || height <= 0) {
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throw new Error("Invalid dimensions for plot, width = " + width + ", height = " + height);
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}
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var element = this.element,
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context = this.context,
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pixelRatio = this.pixelRatio;
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// Resize the canvas, increasing its density based on the display's
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// pixel ratio; basically giving it more pixels without increasing the
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// size of its element, to take advantage of the fact that retina
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// displays have that many more pixels in the same advertised space.
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// Resizing should reset the state (excanvas seems to be buggy though)
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if (this.width !== width) {
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element.width = width * pixelRatio;
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element.style.width = width + "px";
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this.width = width;
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}
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if (this.height !== height) {
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element.height = height * pixelRatio;
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element.style.height = height + "px";
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this.height = height;
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}
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// Save the context, so we can reset in case we get replotted. The
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// restore ensure that we're really back at the initial state, and
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// should be safe even if we haven't saved the initial state yet.
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context.restore();
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context.save();
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// Scale the coordinate space to match the display density; so even though we
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// may have twice as many pixels, we still want lines and other drawing to
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// appear at the same size; the extra pixels will just make them crisper.
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context.scale(pixelRatio, pixelRatio);
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};
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/**
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* Clears the entire canvas area, not including any overlaid HTML text
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*/
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Canvas.prototype.clear = function() {
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this.context.clearRect(0, 0, this.width, this.height);
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};
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/**
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* Finishes rendering the canvas, including managing the text overlay.
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*/
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Canvas.prototype.render = function() {
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var cache = this._textCache;
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// For each text layer, add elements marked as active that haven't
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// already been rendered, and remove those that are no longer active.
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for (var layerKey in cache) {
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if (Object.prototype.hasOwnProperty.call(cache, layerKey)) {
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var layer = this.getTextLayer(layerKey),
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layerCache = cache[layerKey];
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layer.hide();
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for (var styleKey in layerCache) {
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if (Object.prototype.hasOwnProperty.call(layerCache, styleKey)) {
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var styleCache = layerCache[styleKey];
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for (var angleKey in styleCache) {
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if (Object.prototype.hasOwnProperty.call(styleCache, angleKey)) {
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var angleCache = styleCache[angleKey];
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for (var key in angleCache) {
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if (Object.prototype.hasOwnProperty.call(angleCache, key)) {
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var positions = angleCache[key].positions;
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for (var i = 0, position; position = positions[i]; i++) {
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if (position.active) {
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if (!position.rendered) {
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layer.append(position.element);
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position.rendered = true;
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}
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} else {
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positions.splice(i--, 1);
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if (position.rendered) {
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position.element.detach();
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}
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}
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}
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if (positions.length === 0) {
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delete angleCache[key];
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}
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}
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}
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}
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}
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}
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}
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layer.show();
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}
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}
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};
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/**
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* Creates (if necessary) and returns the text overlay container.
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*
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* @param {string} classes String of space-separated CSS classes used to
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* uniquely identify the text layer.
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* @return {object} The jQuery-wrapped text-layer div.
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*/
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Canvas.prototype.getTextLayer = function(classes) {
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var layer = this.text[classes];
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// Create the text layer if it doesn't exist
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if (layer == null) {
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// Create the text layer container, if it doesn't exist
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if (this.textContainer == null) {
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this.textContainer = $("<div class='flot-text'></div>")
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.css({
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position: "absolute",
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top: 0,
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left: 0,
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bottom: 0,
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right: 0,
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"font-size": "smaller",
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color: "#545454"
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})
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.insertAfter(this.element);
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}
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layer = this.text[classes] = $("<div></div>")
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.addClass(classes)
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.css({
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position: "absolute",
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top: 0,
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left: 0,
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bottom: 0,
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right: 0
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})
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.appendTo(this.textContainer);
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}
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return layer;
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};
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/**
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* Creates (if necessary) and returns a text info object.
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*
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* The object looks like this:
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*
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* {
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* width: Width of the text's wrapper div.
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* height: Height of the text's wrapper div.
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* element: The jQuery-wrapped HTML div containing the text.
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* positions: Array of positions at which this text is drawn.
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* }
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*
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* The positions array contains objects that look like this:
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*
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* {
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* active: Flag indicating whether the text should be visible.
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* rendered: Flag indicating whether the text is currently visible.
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* element: The jQuery-wrapped HTML div containing the text.
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* x: X coordinate at which to draw the text.
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* y: Y coordinate at which to draw the text.
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* }
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*
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* Each position after the first receives a clone of the original element.
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*
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* The idea is that that the width, height, and general 'identity' of the
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* text is constant no matter where it is placed; the placements are a
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* secondary property.
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*
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* Canvas maintains a cache of recently-used text info objects; getTextInfo
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* either returns the cached element or creates a new entry.
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*
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* @param {string} layer A string of space-separated CSS classes uniquely
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* identifying the layer containing this text.
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* @param {string} text Text string to retrieve info for.
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* @param {(string|object)=} font Either a string of space-separated CSS
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* classes or a font-spec object, defining the text's font and style.
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* @param {number=} angle Angle at which to rotate the text, in degrees.
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* @param {number=} width Maximum width of the text before it wraps.
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* @return {object} a text info object.
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*/
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Canvas.prototype.getTextInfo = function(layer, text, font, angle, width) {
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var textStyle, layerCache, styleCache, angleCache, info;
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// Cast to string in case we have a number or such
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text = "" + text;
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// Normalize the angle to 0...359
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angle = (360 + (angle || 0)) % 360;
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// If the font is a font-spec object, generate a CSS font definition
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if (typeof font === "object") {
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textStyle = font.style + " " + font.variant + " " + font.weight + " " + font.size + "px/" + font.lineHeight + "px " + font.family;
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} else {
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textStyle = font;
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}
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// Retrieve or create the caches for the text's layer, style, and angle
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layerCache = this._textCache[layer];
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if (layerCache == null) {
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layerCache = this._textCache[layer] = {};
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}
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styleCache = layerCache[textStyle];
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if (styleCache == null) {
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styleCache = layerCache[textStyle] = {};
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}
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angleCache = styleCache[angle];
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if (angleCache == null) {
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angleCache = styleCache[angle] = {};
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}
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info = angleCache[text];
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// If we can't find a matching element in our cache, create a new one
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if (info == null) {
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var element = $("<div></div>").html(text)
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.css({
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position: "absolute",
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"max-width": width,
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top: -9999
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})
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.appendTo(this.getTextLayer(layer));
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if (typeof font === "object") {
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element.css({
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font: textStyle,
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color: font.color
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});
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} else if (typeof font === "string") {
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element.addClass(font);
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}
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// Save the original dimensions of the text; we'll modify these
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// later to take into account rotation, if there is any.
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var textWidth = element.outerWidth(true),
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textHeight = element.outerHeight(true);
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// Apply rotation to the text using CSS3/IE matrix transforms
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// Note how we also set the element's width, as a work-around for
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// the way most browsers resize the div on rotate, which may cause
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// the contents to wrap differently. The extra +1 is because IE
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// rounds the width differently and needs a little extra help.
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if (angle) {
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var radians = angle * Math.PI / 180,
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sin = Math.sin(radians),
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cos = Math.cos(radians),
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// Use fixed-point so these don't show up in scientific
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// notation when we add them to the string
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a = cos.toFixed(6),
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b = (-sin).toFixed(6),
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c = sin.toFixed(6),
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transformRule;
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// Detect IE7/8 to use microsofts proprietary matrix filter
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// $.support.leadingWhitespace is false on IE7/8, true on other browsers and
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// undefined with jQuery greater 2.0, which dropped support for IE7/8.
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if ($.support.leadingWhitespace !== false) {
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// The transform origin defaults to '50% 50%', producing
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// blurry text on some browsers (Chrome) when the width or
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// height happens to be odd, making 50% fractional. Avoid
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// this by setting the origin to rounded values.
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var cx = textWidth / 2,
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cy = textHeight / 2,
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transformOrigin = Math.floor(cx) + "px " + Math.floor(cy) + "px",
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// Transforms alter the div's appearance without changing
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// its origin. This will make it difficult to position it
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// later, since we'll be positioning the new bounding box
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// with respect to the old origin. We can work around this
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// by adding a translation to align the new bounding box's
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// top-left corner with the origin, using the same matrix.
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// Rather than examining all four points, we can use the
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// angle to figure out in advance which two points are in
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// the top-left quadrant; we can then use the x-coordinate
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// of the first (left-most) point and the y-coordinate of
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// the second (top-most) point as the bounding box corner.
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x, y;
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if (angle < 90) {
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x = Math.floor(cx * cos + cy * sin - cx);
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y = Math.floor(cx * sin + cy * cos - cy);
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} else if (angle < 180) {
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x = Math.floor(cy * sin - cx * cos - cx);
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y = Math.floor(cx * sin - cy * cos - cy);
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} else if (angle < 270) {
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x = Math.floor(-cx * cos - cy * sin - cx);
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y = Math.floor(-cx * sin - cy * cos - cy);
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} else {
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x = Math.floor(cx * cos - cy * sin - cx);
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y = Math.floor(cy * cos - cx * sin - cy);
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}
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transformRule = "matrix(" + a + "," + c + "," + b + "," + a + "," + x + "," + y + ")";
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element.css({
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width: textWidth + 1,
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transform: transformRule,
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"-o-transform": transformRule,
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"-ms-transform": transformRule,
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"-moz-transform": transformRule,
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"-webkit-transform": transformRule,
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"transform-origin": transformOrigin,
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"-o-transform-origin": transformOrigin,
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"-ms-transform-origin": transformOrigin,
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"-moz-transform-origin": transformOrigin,
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"-webkit-transform-origin": transformOrigin
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});
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} else {
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// The IE7/8 matrix filter produces very ugly aliasing for
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// text with a transparent background. Using a solid color
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// greatly improves text clarity, although it does result
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// in ugly boxes for plots using a non-white background.
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// TODO: Instead of white use the actual background color?
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// This still wouldn't solve the problem when the plot has
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// a gradient background, but it would at least help.
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transformRule = "progid:DXImageTransform.Microsoft.Matrix(M11=" + a + ", M12=" + b + ", M21=" + c + ", M22=" + a + ",sizingMethod='auto expand')";
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element.css({
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width: textWidth + 1,
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filter: transformRule,
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"-ms-filter": transformRule,
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"background-color": "#fff"
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});
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}
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// Compute the final dimensions of the text's bounding box
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var ac = Math.abs(cos),
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as = Math.abs(sin),
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originalWidth = textWidth;
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textWidth = Math.round(ac * textWidth + as * textHeight);
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textHeight = Math.round(as * originalWidth + ac * textHeight);
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}
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info = angleCache[text] = {
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width: textWidth,
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height: textHeight,
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element: element,
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positions: []
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};
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element.detach();
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}
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return info;
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};
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/**
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* Adds a text string to the canvas text overlay.
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*
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* The text isn't drawn immediately; it is marked as rendering, which will
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* result in its addition to the canvas on the next render pass.
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*
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* @param {string} layer A string of space-separated CSS classes uniquely
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* identifying the layer containing this text.
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* @param {number} x X coordinate at which to draw the text.
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* @param {number} y Y coordinate at which to draw the text.
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* @param {string} text Text string to draw.
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* @param {(string|object)=} font Either a string of space-separated CSS
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* classes or a font-spec object, defining the text's font and style.
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* @param {number=} angle Angle at which to rotate the text, in degrees.
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* @param {number=} width Maximum width of the text before it wraps.
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* @param {string=} halign Horizontal alignment of the text; either "left",
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* "center" or "right".
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* @param {string=} valign Vertical alignment of the text; either "top",
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* "middle" or "bottom".
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*/
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Canvas.prototype.addText = function(layer, x, y, text, font, angle, width, halign, valign) {
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var info = this.getTextInfo(layer, text, font, angle, width),
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positions = info.positions;
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// Tweak the div's position to match the text's alignment
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if (halign === "center") {
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x -= info.width / 2;
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} else if (halign === "right") {
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x -= info.width;
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}
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if (valign === "middle") {
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y -= info.height / 2;
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} else if (valign === "bottom") {
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y -= info.height;
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}
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// Determine whether this text already exists at this position.
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// If so, mark it for inclusion in the next render pass.
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for (var i = 0, position; position = positions[i]; i++) {
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if (position.x === x && position.y === y) {
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position.active = true;
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return;
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}
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}
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// If the text doesn't exist at this position, create a new entry
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// For the very first position we'll re-use the original element,
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// while for subsequent ones we'll clone it.
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position = {
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active: true,
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rendered: false,
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element: positions.length ? info.element.clone() : info.element,
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x: x,
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y: y
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};
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positions.push(position);
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// Move the element to its final position within the container
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position.element.css({
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top: Math.round(y),
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left: Math.round(x),
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// In case the text wraps
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"text-align": halign
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});
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};
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/**
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* Removes one or more text strings from the canvas text overlay.
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*
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* If no parameters are given, all text within the layer is removed.
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*
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|
* Note that the text is not immediately removed; it is simply marked as
|
|
* inactive, which will result in its removal on the next render pass.
|
|
* This avoids the performance penalty for 'clear and redraw' behavior,
|
|
* where we potentially get rid of all text on a layer, but will likely
|
|
* add back most or all of it later, as when redrawing axes, for example.
|
|
*
|
|
* @param {string} layer A string of space-separated CSS classes uniquely
|
|
* identifying the layer containing this text.
|
|
* @param {number=} x X coordinate of the text.
|
|
* @param {number=} y Y coordinate of the text.
|
|
* @param {string=} text Text string to remove.
|
|
* @param {(string|object)=} font Either a string of space-separated CSS
|
|
* classes or a font-spec object, defining the text's font and style.
|
|
* @param {number=} angle Angle at which the text is rotated, in degrees.
|
|
* Angle is currently unused, it will be implemented in the future.
|
|
*/
|
|
Canvas.prototype.removeText = function(layer, x, y, text, font, angle) {
|
|
var i, positions, position;
|
|
if (text == null) {
|
|
var layerCache = this._textCache[layer];
|
|
if (layerCache != null) {
|
|
for (var styleKey in layerCache) {
|
|
if (Object.prototype.hasOwnProperty.call(layerCache, styleKey)) {
|
|
var styleCache = layerCache[styleKey];
|
|
for (var angleKey in styleCache) {
|
|
if (Object.prototype.hasOwnProperty.call(styleCache, angleKey)) {
|
|
var angleCache = styleCache[angleKey];
|
|
for (var key in angleCache) {
|
|
if (Object.prototype.hasOwnProperty.call(angleCache, key)) {
|
|
positions = angleCache[key].positions;
|
|
for (i = 0; position = positions[i]; i++) {
|
|
position.active = false;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
positions = this.getTextInfo(layer, text, font, angle).positions;
|
|
for (i = 0; position = positions[i]; i++) {
|
|
if (position.x === x && position.y === y) {
|
|
position.active = false;
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
/**
|
|
* The top-level container for the entire plot.
|
|
*/
|
|
function Plot(placeholder, data_, options_, plugins) {
|
|
|
|
// data is on the form:
|
|
// [ series1, series2 ... ]
|
|
// where series is either just the data as [ [x1, y1], [x2, y2], ... ]
|
|
// or { data: [ [x1, y1], [x2, y2], ... ], label: "some label", ... }
|
|
var series = [],
|
|
options = {
|
|
|
|
// the color theme used for graphs
|
|
colors: ["#edc240", "#afd8f8", "#cb4b4b", "#4da74d", "#9440ed"],
|
|
legend: {
|
|
show: true,
|
|
|
|
// number of colums in legend table
|
|
noColumns: 1,
|
|
|
|
// fn: string -> string
|
|
labelFormatter: null,
|
|
|
|
// border color for the little label boxes
|
|
labelBoxBorderColor: "#ccc",
|
|
|
|
// container (as jQuery object) to put legend in, null means default on top of graph
|
|
container: null,
|
|
|
|
// position of default legend container within plot
|
|
position: "ne",
|
|
|
|
// distance from grid edge to default legend container within plot
|
|
margin: 5,
|
|
|
|
// null means auto-detect
|
|
backgroundColor: null,
|
|
|
|
// set to 0 to avoid background
|
|
backgroundOpacity: 0.85,
|
|
|
|
// default to no legend sorting
|
|
sorted: null
|
|
},
|
|
xaxis: {
|
|
|
|
// null = auto-detect, true = always, false = never
|
|
|
|
show: null,
|
|
|
|
// or "top"
|
|
position: "bottom",
|
|
|
|
// null or "time"
|
|
mode: null,
|
|
|
|
// base color, labels, ticks
|
|
color: null,
|
|
|
|
// null (derived from CSS in placeholder) or
|
|
// object like { size: 11, lineHeight: 13, style: "italic", weight: "bold", family: "sans-serif", variant: "small-caps" }
|
|
font: null,
|
|
|
|
// min. value to show, null means set automatically
|
|
min: null,
|
|
|
|
// max. value to show, null means set automatically
|
|
max: null,
|
|
|
|
// margin in % to add if auto-setting min/max
|
|
autoscaleMargin: null,
|
|
|
|
// null or f: number -> number to transform axis
|
|
transform: null,
|
|
|
|
// if transform is set, this should be the inverse function
|
|
inverseTransform: null,
|
|
|
|
// either [1, 3] or [[1, "a"], 3] or (fn: axis info -> ticks) or app. number of ticks for auto-ticks
|
|
ticks: null,
|
|
|
|
// number or [number, "unit"]
|
|
tickSize: null,
|
|
|
|
// number or [number, "unit"]
|
|
minTickSize: null,
|
|
|
|
// fn: number -> string
|
|
tickFormatter: null,
|
|
|
|
// no. of decimals, null means auto
|
|
tickDecimals: null,
|
|
|
|
// possibly different color of ticks, e.g. "rgba(0,0,0,0.15)"
|
|
tickColor: null,
|
|
|
|
// size in pixels of ticks, or "full" for whole line
|
|
tickLength: null,
|
|
|
|
// width of tick labels in pixels
|
|
tickWidth: null,
|
|
|
|
// height of tick labels in pixels
|
|
tickHeight: null,
|
|
|
|
// null or font-spec object (see font, above)
|
|
tickFont: null,
|
|
|
|
// null or an axis label string
|
|
label: null,
|
|
|
|
// null or font-spec object (see font, above)
|
|
labelFont: null,
|
|
|
|
// spacing between the axis and its label
|
|
labelPadding: 2,
|
|
|
|
// whether to reserve space even if axis isn't shown
|
|
reserveSpace: null,
|
|
|
|
// axis number or null for no sync
|
|
alignTicksWithAxis: null
|
|
},
|
|
yaxis: {
|
|
|
|
// also accepts "right"
|
|
position: "left",
|
|
autoscaleMargin: 0.02,
|
|
labelPadding: 2
|
|
},
|
|
xaxes: [],
|
|
yaxes: [],
|
|
series: {
|
|
points: {
|
|
show: false,
|
|
radius: 3,
|
|
|
|
// value in pixels
|
|
lineWidth: 2,
|
|
fill: true,
|
|
fillColor: "#ffffff",
|
|
strokeColor: null,
|
|
|
|
// type or callback
|
|
symbol: "circle"
|
|
},
|
|
|
|
|
|
lines: {
|
|
|
|
// we don't put in show: false so we can see
|
|
// whether lines were actively disabled
|
|
|
|
// value in pixels
|
|
lineWidth: 2,
|
|
fill: false,
|
|
fillColor: null,
|
|
steps: false
|
|
|
|
// Omit 'zero', so we can later default its value to
|
|
// match that of the 'fill' option.
|
|
},
|
|
bars: {
|
|
show: false,
|
|
|
|
// in pixels
|
|
lineWidth: 2,
|
|
|
|
// in units of the x axis
|
|
barWidth: 1,
|
|
|
|
fill: true,
|
|
fillColor: null,
|
|
|
|
// "left", "right", or "center"
|
|
align: "left",
|
|
horizontal: false,
|
|
zero: true
|
|
},
|
|
shadowSize: 3,
|
|
highlightColor: null
|
|
},
|
|
grid: {
|
|
show: true,
|
|
aboveData: false,
|
|
|
|
// primary color used for outline and labels
|
|
color: "#545454",
|
|
|
|
// null for transparent, else color
|
|
backgroundColor: null,
|
|
|
|
// set if different from the grid color
|
|
borderColor: null,
|
|
|
|
// color for the ticks, e.g. "rgba(0,0,0,0.15)"
|
|
tickColor: null,
|
|
|
|
// distance from the canvas edge to the grid
|
|
margin: 0,
|
|
|
|
// value in pixels
|
|
labelMargin: 5,
|
|
|
|
// value in pixels
|
|
axisMargin: 8,
|
|
|
|
// value in pixels
|
|
borderWidth: 2,
|
|
|
|
// value in pixels, null means taken from points radius
|
|
minBorderMargin: null,
|
|
|
|
// array of ranges or fn: axes -> array of ranges
|
|
markings: null,
|
|
markingsColor: "#f4f4f4",
|
|
markingsLineWidth: 2,
|
|
|
|
// interactive stuff
|
|
clickable: false,
|
|
hoverable: false,
|
|
|
|
// highlight in case mouse is near
|
|
autoHighlight: true,
|
|
|
|
// how far the mouse can be away to activate an item
|
|
mouseActiveRadius: 10
|
|
},
|
|
interaction: {
|
|
|
|
// time between updates, -1 means in same flow
|
|
redrawOverlayInterval: 1000 / 60
|
|
},
|
|
hooks: {}
|
|
},
|
|
|
|
// interactive features
|
|
highlights = [],
|
|
redrawTimeout = null,
|
|
|
|
// the canvas for the plot itself
|
|
surface = null,
|
|
|
|
// canvas for interactive stuff on top of plot
|
|
overlay = null,
|
|
|
|
// jQuery object that events should be bound to
|
|
eventHolder = null,
|
|
ctx = null,
|
|
octx = null,
|
|
xaxes = [],
|
|
yaxes = [],
|
|
plotOffset = {
|
|
left: 0,
|
|
right: 0,
|
|
top: 0,
|
|
bottom: 0
|
|
},
|
|
plotWidth = 0,
|
|
plotHeight = 0,
|
|
hooks = {
|
|
processOptions: [],
|
|
processRawData: [],
|
|
processDatapoints: [],
|
|
processOffset: [],
|
|
drawBackground: [],
|
|
drawSeries: [],
|
|
draw: [],
|
|
bindEvents: [],
|
|
drawOverlay: [],
|
|
shutdown: []
|
|
},
|
|
plot = this;
|
|
|
|
// public functions
|
|
plot.setData = setData;
|
|
plot.setupGrid = setupGrid;
|
|
plot.draw = draw;
|
|
plot.getPlaceholder = function() { return placeholder; };
|
|
plot.getCanvas = function() { return surface.element; };
|
|
plot.getPlotOffset = function() { return plotOffset; };
|
|
plot.width = function() { return plotWidth; };
|
|
plot.height = function() { return plotHeight; };
|
|
plot.offset = function() {
|
|
var o = eventHolder.offset();
|
|
o.left += plotOffset.left;
|
|
o.top += plotOffset.top;
|
|
return o;
|
|
};
|
|
plot.getData = function() { return series; };
|
|
plot.getAxes = function() {
|
|
var res = {};
|
|
$.each(xaxes.concat(yaxes), function(_, axis) {
|
|
if (axis) {
|
|
res[axis.direction + (axis.n !== 1 ? axis.n : "") + "axis"] = axis;
|
|
}
|
|
});
|
|
return res;
|
|
};
|
|
plot.getXAxes = function() { return xaxes; };
|
|
plot.getYAxes = function() { return yaxes; };
|
|
plot.c2p = canvasToAxisCoords;
|
|
plot.p2c = axisToCanvasCoords;
|
|
plot.getOptions = function() { return options; };
|
|
plot.highlight = highlight;
|
|
plot.unhighlight = unhighlight;
|
|
plot.triggerRedrawOverlay = triggerRedrawOverlay;
|
|
plot.pointOffset = function(point) {
|
|
return {
|
|
left: parseInt(xaxes[axisNumber(point, "x") - 1].p2c(+point.x) + plotOffset.left, 10),
|
|
top: parseInt(yaxes[axisNumber(point, "y") - 1].p2c(+point.y) + plotOffset.top, 10)
|
|
};
|
|
};
|
|
plot.shutdown = shutdown;
|
|
plot.destroy = function() {
|
|
shutdown();
|
|
placeholder.removeData("plot").empty();
|
|
|
|
series = [];
|
|
options = null;
|
|
surface = null;
|
|
overlay = null;
|
|
eventHolder = null;
|
|
ctx = null;
|
|
octx = null;
|
|
xaxes = [];
|
|
yaxes = [];
|
|
hooks = null;
|
|
highlights = [];
|
|
plot = null;
|
|
};
|
|
plot.resize = function(width, height) {
|
|
width = width || placeholder.width();
|
|
height = height || placeholder.height();
|
|
surface.resize(width, height);
|
|
overlay.resize(width, height);
|
|
};
|
|
|
|
// public attributes
|
|
plot.hooks = hooks;
|
|
|
|
// initialize
|
|
initPlugins(plot);
|
|
parseOptions(options_);
|
|
setupCanvases();
|
|
setData(data_);
|
|
setupGrid();
|
|
draw();
|
|
bindEvents();
|
|
|
|
function executeHooks(hook, args) {
|
|
args = [plot].concat(args);
|
|
for (var i = 0; i < hook.length; ++i) {
|
|
hook[i].apply(this, args);
|
|
}
|
|
}
|
|
|
|
function initPlugins() {
|
|
|
|
// References to key classes, allowing plugins to modify them
|
|
var classes = {
|
|
Canvas: Canvas
|
|
};
|
|
|
|
for (var i = 0; i < plugins.length; ++i) {
|
|
var p = plugins[i];
|
|
p.init(plot, classes);
|
|
if (p.options) {
|
|
$.extend(true, options, p.options);
|
|
}
|
|
}
|
|
}
|
|
|
|
function parseOptions(opts) {
|
|
|
|
$.extend(true, options, opts);
|
|
|
|
// $.extend merges arrays, rather than replacing them. When less
|
|
// colors are provided than the size of the default palette, we
|
|
// end up with those colors plus the remaining defaults, which is
|
|
// not expected behavior; avoid it by replacing them here.
|
|
if (opts && opts.colors) {
|
|
options.colors = opts.colors;
|
|
}
|
|
|
|
if (options.xaxis.color == null) {
|
|
options.xaxis.color = $.color.parse(options.grid.color).scale("a", 0.22).toString();
|
|
}
|
|
if (options.yaxis.color == null) {
|
|
options.yaxis.color = $.color.parse(options.grid.color).scale("a", 0.22).toString();
|
|
}
|
|
|
|
if (options.xaxis.tickColor == null) {
|
|
|
|
// grid.tickColor for back-compatibility
|
|
options.xaxis.tickColor = options.grid.tickColor || options.xaxis.color;
|
|
}
|
|
if (options.yaxis.tickColor == null) {
|
|
|
|
// grid.tickColor for back-compatibility
|
|
options.yaxis.tickColor = options.grid.tickColor || options.yaxis.color;
|
|
}
|
|
|
|
if (options.grid.borderColor == null) {
|
|
options.grid.borderColor = options.grid.color;
|
|
}
|
|
if (options.grid.tickColor == null) {
|
|
options.grid.tickColor = $.color.parse(options.grid.color).scale("a", 0.22).toString();
|
|
}
|
|
|
|
// Fill in defaults for axis options, including any unspecified
|
|
// font-spec fields, if a font-spec was provided.
|
|
|
|
// If no x/y axis options were provided, create one of each anyway,
|
|
// since the rest of the code assumes that they exist.
|
|
var i, axisOptions, axisCount,
|
|
fontSize = placeholder.css("font-size"),
|
|
fontSizeDefault = fontSize ? +fontSize.replace("px", "") : 13,
|
|
fontDefaults = {
|
|
style: placeholder.css("font-style"),
|
|
size: Math.round(0.8 * fontSizeDefault),
|
|
variant: placeholder.css("font-variant"),
|
|
weight: placeholder.css("font-weight"),
|
|
family: placeholder.css("font-family")
|
|
},
|
|
markings;
|
|
|
|
axisCount = options.xaxes.length || 1;
|
|
for (i = 0; i < axisCount; ++i) {
|
|
|
|
axisOptions = options.xaxes[i];
|
|
if (axisOptions && !axisOptions.tickColor) {
|
|
axisOptions.tickColor = axisOptions.color;
|
|
}
|
|
|
|
// Compatibility with markrcote/flot-axislabels
|
|
if (axisOptions) {
|
|
if (!axisOptions.label && axisOptions.axisLabel) {
|
|
axisOptions.label = axisOptions.axisLabel;
|
|
}
|
|
if (!axisOptions.labelPadding && axisOptions.axisLabelPadding) {
|
|
axisOptions.labelPadding = axisOptions.axisLabelPadding;
|
|
}
|
|
}
|
|
|
|
axisOptions = $.extend(true, {}, options.xaxis, axisOptions);
|
|
options.xaxes[i] = axisOptions;
|
|
|
|
if (axisOptions.font) {
|
|
axisOptions.font = $.extend({}, fontDefaults, axisOptions.font);
|
|
}
|
|
if (axisOptions.tickFont || axisOptions.font) {
|
|
axisOptions.tickFont = $.extend({}, axisOptions.font || fontDefaults, axisOptions.tickFont);
|
|
if (!axisOptions.tickFont.color) {
|
|
axisOptions.tickFont.color = axisOptions.color;
|
|
}
|
|
if (!axisOptions.tickFont.lineHeight) {
|
|
axisOptions.tickFont.lineHeight = Math.round(axisOptions.tickFont.size * 1.15);
|
|
}
|
|
}
|
|
if (axisOptions.label && (axisOptions.labelFont || axisOptions.font)) {
|
|
axisOptions.labelFont = $.extend({}, axisOptions.font || fontDefaults, axisOptions.labelFont);
|
|
if (!axisOptions.labelFont.color) {
|
|
axisOptions.labelFont.color = axisOptions.color;
|
|
}
|
|
if (!axisOptions.labelFont.lineHeight) {
|
|
axisOptions.labelFont.lineHeight = Math.round(axisOptions.labelFont.size * 1.15);
|
|
}
|
|
}
|
|
if (axisOptions.font) {
|
|
if (!axisOptions.font.color) {
|
|
axisOptions.font.color = axisOptions.color;
|
|
}
|
|
if (!axisOptions.font.lineHeight) {
|
|
axisOptions.font.lineHeight = Math.round(axisOptions.font.size * 1.15);
|
|
}
|
|
}
|
|
}
|
|
|
|
axisCount = options.yaxes.length || 1;
|
|
for (i = 0; i < axisCount; ++i) {
|
|
|
|
axisOptions = options.yaxes[i];
|
|
if (axisOptions && !axisOptions.tickColor) {
|
|
axisOptions.tickColor = axisOptions.color;
|
|
}
|
|
|
|
// Compatibility with markrcote/flot-axislabels
|
|
if (axisOptions) {
|
|
if (!axisOptions.label && axisOptions.axisLabel) {
|
|
axisOptions.label = axisOptions.axisLabel;
|
|
}
|
|
if (!axisOptions.labelPadding && axisOptions.axisLabelPadding) {
|
|
axisOptions.labelPadding = axisOptions.axisLabelPadding;
|
|
}
|
|
}
|
|
|
|
axisOptions = $.extend(true, {}, options.yaxis, axisOptions);
|
|
options.yaxes[i] = axisOptions;
|
|
|
|
if (axisOptions.font) {
|
|
axisOptions.font = $.extend({}, fontDefaults, axisOptions.font);
|
|
}
|
|
if (axisOptions.tickFont || axisOptions.font) {
|
|
axisOptions.tickFont = $.extend({}, axisOptions.font || fontDefaults, axisOptions.tickFont);
|
|
if (!axisOptions.tickFont.color) {
|
|
axisOptions.tickFont.color = axisOptions.color;
|
|
}
|
|
if (!axisOptions.tickFont.lineHeight) {
|
|
axisOptions.tickFont.lineHeight = Math.round(axisOptions.tickFont.size * 1.15);
|
|
}
|
|
}
|
|
if (axisOptions.label && (axisOptions.labelFont || axisOptions.font)) {
|
|
axisOptions.labelFont = $.extend({}, axisOptions.font || fontDefaults, axisOptions.labelFont);
|
|
if (!axisOptions.labelFont.color) {
|
|
axisOptions.labelFont.color = axisOptions.color;
|
|
}
|
|
if (!axisOptions.labelFont.lineHeight) {
|
|
axisOptions.labelFont.lineHeight = Math.round(axisOptions.labelFont.size * 1.15);
|
|
}
|
|
}
|
|
if (axisOptions.font) {
|
|
if (!axisOptions.font.color) {
|
|
axisOptions.font.color = axisOptions.color;
|
|
}
|
|
if (!axisOptions.font.lineHeight) {
|
|
axisOptions.font.lineHeight = Math.round(axisOptions.font.size * 1.15);
|
|
}
|
|
}
|
|
}
|
|
|
|
markings = options.grid.markings;
|
|
if ($.isArray(markings)) {
|
|
for (i = 0; i < markings.length; ++i) {
|
|
|
|
if (markings[i].font) {
|
|
markings[i].font = $.extend({}, fontDefaults, markings[i].font);
|
|
}
|
|
}
|
|
}
|
|
|
|
// backwards compatibility, to be removed in future
|
|
if (options.xaxis.noTicks && options.xaxis.ticks == null) {
|
|
options.xaxis.ticks = options.xaxis.noTicks;
|
|
}
|
|
if (options.yaxis.noTicks && options.yaxis.ticks == null) {
|
|
options.yaxis.ticks = options.yaxis.noTicks;
|
|
}
|
|
if (options.x2axis) {
|
|
options.xaxes[1] = $.extend(true, {}, options.xaxis, options.x2axis);
|
|
options.xaxes[1].position = "top";
|
|
// Override the inherit to allow the axis to auto-scale
|
|
if (options.x2axis.min == null) {
|
|
options.xaxes[1].min = null;
|
|
}
|
|
if (options.x2axis.max == null) {
|
|
options.xaxes[1].max = null;
|
|
}
|
|
}
|
|
if (options.y2axis) {
|
|
options.yaxes[1] = $.extend(true, {}, options.yaxis, options.y2axis);
|
|
options.yaxes[1].position = "right";
|
|
// Override the inherit to allow the axis to auto-scale
|
|
if (options.y2axis.min == null) {
|
|
options.yaxes[1].min = null;
|
|
}
|
|
if (options.y2axis.max == null) {
|
|
options.yaxes[1].max = null;
|
|
}
|
|
}
|
|
if (options.grid.coloredAreas) {
|
|
options.grid.markings = options.grid.coloredAreas;
|
|
}
|
|
if (options.grid.coloredAreasColor) {
|
|
options.grid.markingsColor = options.grid.coloredAreasColor;
|
|
}
|
|
if (options.lines) {
|
|
$.extend(true, options.series.lines, options.lines);
|
|
}
|
|
if (options.points) {
|
|
$.extend(true, options.series.points, options.points);
|
|
}
|
|
if (options.bars) {
|
|
$.extend(true, options.series.bars, options.bars);
|
|
}
|
|
if (options.shadowSize != null) {
|
|
options.series.shadowSize = options.shadowSize;
|
|
}
|
|
if (options.highlightColor != null) {
|
|
options.series.highlightColor = options.highlightColor;
|
|
}
|
|
|
|
// save options on axes for future reference
|
|
for (i = 0; i < options.xaxes.length; ++i) {
|
|
getOrCreateAxis(xaxes, i + 1).options = options.xaxes[i];
|
|
}
|
|
for (i = 0; i < options.yaxes.length; ++i) {
|
|
getOrCreateAxis(yaxes, i + 1).options = options.yaxes[i];
|
|
}
|
|
|
|
// add hooks from options
|
|
for (var n in hooks) {
|
|
if (options.hooks[n] && options.hooks[n].length) {
|
|
hooks[n] = hooks[n].concat(options.hooks[n]);
|
|
}
|
|
}
|
|
|
|
executeHooks(hooks.processOptions, [options]);
|
|
}
|
|
|
|
function setData(d) {
|
|
series = parseData(d);
|
|
fillInSeriesOptions();
|
|
processData();
|
|
}
|
|
|
|
function parseData(d) {
|
|
var res = [];
|
|
for (var i = 0; i < d.length; ++i) {
|
|
var s = $.extend(true, {}, options.series);
|
|
|
|
if (d[i].data != null) {
|
|
|
|
// move the data instead of deep-copy
|
|
s.data = d[i].data;
|
|
delete d[i].data;
|
|
|
|
$.extend(true, s, d[i]);
|
|
|
|
d[i].data = s.data;
|
|
} else {
|
|
s.data = d[i];
|
|
}
|
|
res.push(s);
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
function axisNumber(obj, coord) {
|
|
var a = obj[coord + "axis"];
|
|
|
|
if (typeof a === "object") {
|
|
|
|
// if we got a real axis, extract number
|
|
a = a.n;
|
|
}
|
|
if (!isNumeric(a)) {
|
|
|
|
// default to first axis
|
|
a = 1;
|
|
}
|
|
return a;
|
|
}
|
|
|
|
function allAxes() {
|
|
|
|
// return flat array without annoying null entries
|
|
return $.grep(xaxes.concat(yaxes), function(a) { return a; });
|
|
}
|
|
|
|
function canvasToAxisCoords(pos) {
|
|
|
|
// return an object with x/y corresponding to all used axes
|
|
var res = {}, i, axis;
|
|
for (i = 0; i < xaxes.length; ++i) {
|
|
axis = xaxes[i];
|
|
if (axis && axis.used) {
|
|
res["x" + axis.n] = axis.c2p(pos.left);
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < yaxes.length; ++i) {
|
|
axis = yaxes[i];
|
|
if (axis && axis.used) {
|
|
res["y" + axis.n] = axis.c2p(pos.top);
|
|
}
|
|
}
|
|
|
|
if (res.x1 !== undefined) {
|
|
res.x = res.x1;
|
|
}
|
|
if (res.y1 !== undefined) {
|
|
res.y = res.y1;
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
function axisToCanvasCoords(pos) {
|
|
|
|
// get canvas coords from the first pair of x/y found in pos
|
|
var res = {}, i, axis, key;
|
|
|
|
for (i = 0; i < xaxes.length; ++i) {
|
|
axis = xaxes[i];
|
|
if (axis && axis.used) {
|
|
key = "x" + axis.n;
|
|
if (pos[key] == null && axis.n === 1) {
|
|
key = "x";
|
|
}
|
|
|
|
if (pos[key] != null) {
|
|
res.left = axis.p2c(pos[key]);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < yaxes.length; ++i) {
|
|
axis = yaxes[i];
|
|
if (axis && axis.used) {
|
|
key = "y" + axis.n;
|
|
if (pos[key] == null && axis.n === 1) {
|
|
key = "y";
|
|
}
|
|
|
|
if (pos[key] != null) {
|
|
res.top = axis.p2c(pos[key]);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
function getOrCreateAxis(axes, number) {
|
|
if (!axes[number - 1]) {
|
|
axes[number - 1] = {
|
|
|
|
// save the number for future reference
|
|
n: number,
|
|
direction: axes === xaxes ? "x" : "y",
|
|
options: $.extend(true, {}, axes === xaxes ? options.xaxis : options.yaxis)
|
|
};
|
|
}
|
|
|
|
return axes[number - 1];
|
|
}
|
|
|
|
function fillInSeriesOptions() {
|
|
|
|
var neededColors = series.length, maxIndex = -1, i;
|
|
|
|
// Subtract the number of series that already have fixed colors or
|
|
// color indexes from the number that we still need to generate.
|
|
for (i = 0; i < series.length; ++i) {
|
|
var sc = series[i].color;
|
|
if (sc != null) {
|
|
neededColors--;
|
|
if (isNumeric(sc) && sc > maxIndex) {
|
|
maxIndex = sc;
|
|
}
|
|
}
|
|
}
|
|
|
|
// If any of the series have fixed color indexes, then we need to
|
|
// generate at least as many colors as the highest index.
|
|
if (neededColors <= maxIndex) {
|
|
neededColors = maxIndex + 1;
|
|
}
|
|
|
|
// Generate all the colors, using first the option colors and then
|
|
// variations on those colors once they're exhausted.
|
|
var c, colors = [], colorPool = options.colors,
|
|
colorPoolSize = colorPool.length, variation = 0;
|
|
|
|
for (i = 0; i < neededColors; i++) {
|
|
|
|
c = $.color.parse(colorPool[i % colorPoolSize] || "#666");
|
|
|
|
// Each time we exhaust the colors in the pool we adjust
|
|
// a scaling factor used to produce more variations on
|
|
// those colors. The factor alternates negative/positive
|
|
// to produce lighter/darker colors.
|
|
|
|
// Reset the variation after every few cycles, or else
|
|
// it will end up producing only white or black colors.
|
|
if (i % colorPoolSize === 0 && i) {
|
|
if (variation >= 0) {
|
|
if (variation < 0.5) {
|
|
variation = -variation - 0.2;
|
|
} else {
|
|
variation = 0;
|
|
}
|
|
} else {
|
|
variation = -variation;
|
|
}
|
|
}
|
|
|
|
colors[i] = c.scale("rgb", 1 + variation);
|
|
}
|
|
|
|
// Finalize the series options, filling in their colors
|
|
var colori = 0, s;
|
|
for (i = 0; i < series.length; ++i) {
|
|
s = series[i];
|
|
|
|
// assign colors
|
|
if (s.color == null) {
|
|
s.color = colors[colori].toString();
|
|
++colori;
|
|
} else if (isNumeric(s.color)) {
|
|
s.color = colors[s.color].toString();
|
|
}
|
|
|
|
// turn on lines automatically in case nothing is set
|
|
if (s.lines.show == null) {
|
|
var v, show = true;
|
|
for (v in s) {
|
|
if (s[v] && s[v].show) {
|
|
show = false;
|
|
break;
|
|
}
|
|
}
|
|
if (show) {
|
|
s.lines.show = true;
|
|
}
|
|
}
|
|
|
|
// If nothing was provided for lines.zero, default it to match
|
|
// lines.fill, since areas by default should extend to zero.
|
|
if (s.lines.zero == null) {
|
|
s.lines.zero = !!s.lines.fill;
|
|
}
|
|
|
|
// setup axes
|
|
s.xaxis = getOrCreateAxis(xaxes, axisNumber(s, "x"));
|
|
s.yaxis = getOrCreateAxis(yaxes, axisNumber(s, "y"));
|
|
}
|
|
}
|
|
|
|
function processData() {
|
|
var topSentry = Number.POSITIVE_INFINITY,
|
|
bottomSentry = Number.NEGATIVE_INFINITY,
|
|
fakeInfinity = Number.MAX_VALUE,
|
|
i, j, k, m, s, points, ps, val, f, p, data, format;
|
|
|
|
function updateAxis(axis, min, max) {
|
|
if (min < axis.datamin && min !== -fakeInfinity) {
|
|
axis.datamin = min;
|
|
}
|
|
if (max > axis.datamax && max !== fakeInfinity) {
|
|
axis.datamax = max;
|
|
}
|
|
}
|
|
|
|
$.each(allAxes(), function(_, axis) {
|
|
|
|
// init axis
|
|
axis.datamin = topSentry;
|
|
axis.datamax = bottomSentry;
|
|
axis.used = false;
|
|
});
|
|
|
|
for (i = 0; i < series.length; ++i) {
|
|
s = series[i];
|
|
s.datapoints = { points: [] };
|
|
executeHooks(hooks.processRawData, [s, s.data, s.datapoints]);
|
|
}
|
|
|
|
// first pass: clean and copy data
|
|
for (i = 0; i < series.length; ++i) {
|
|
s = series[i];
|
|
|
|
data = s.data;
|
|
format = s.datapoints.format;
|
|
|
|
if (!format) {
|
|
format = [];
|
|
|
|
// find out how to copy
|
|
format.push({ x: true, number: true, required: true });
|
|
format.push({ y: true, number: true, required: true });
|
|
|
|
if (s.bars.show || (s.lines.show && s.lines.fill)) {
|
|
var autoscale = !!((s.bars.show && s.bars.zero) || (s.lines.show && s.lines.zero));
|
|
format.push({ y: true, number: true, required: false, defaultValue: 0, autoscale: autoscale });
|
|
if (s.bars.horizontal) {
|
|
delete format[format.length - 1].y;
|
|
format[format.length - 1].x = true;
|
|
}
|
|
}
|
|
|
|
s.datapoints.format = format;
|
|
}
|
|
|
|
if (s.datapoints.pointsize != null) {
|
|
|
|
// already filled in
|
|
continue;
|
|
}
|
|
|
|
s.datapoints.pointsize = format.length;
|
|
|
|
ps = s.datapoints.pointsize;
|
|
points = s.datapoints.points;
|
|
|
|
s.xaxis.used = s.yaxis.used = true;
|
|
|
|
for (j = k = 0; j < data.length; ++j, k += ps) {
|
|
p = data[j];
|
|
|
|
var nullify = p == null;
|
|
if (!nullify) {
|
|
for (m = 0; m < ps; ++m) {
|
|
val = p[m];
|
|
f = format[m];
|
|
|
|
if (f) {
|
|
if (f.number && val != null) {
|
|
|
|
// convert to number
|
|
val = +val;
|
|
if (isNaN(val)) {
|
|
val = null;
|
|
} else if (val === Infinity) {
|
|
val = fakeInfinity;
|
|
} else if (val === -Infinity) {
|
|
val = -fakeInfinity;
|
|
}
|
|
}
|
|
|
|
if (val == null) {
|
|
if (f.required) {
|
|
nullify = true;
|
|
}
|
|
|
|
if (f.defaultValue != null) {
|
|
val = f.defaultValue;
|
|
}
|
|
}
|
|
}
|
|
|
|
points[k + m] = val;
|
|
}
|
|
}
|
|
|
|
if (nullify) {
|
|
for (m = 0; m < ps; ++m) {
|
|
val = points[k + m];
|
|
if (val != null) {
|
|
f = format[m];
|
|
|
|
// extract min/max info
|
|
if (f.autoscale !== false) {
|
|
if (f.x) {
|
|
updateAxis(s.xaxis, val, val);
|
|
}
|
|
if (f.y) {
|
|
updateAxis(s.yaxis, val, val);
|
|
}
|
|
}
|
|
}
|
|
points[k + m] = null;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// give the hooks a chance to run
|
|
for (i = 0; i < series.length; ++i) {
|
|
s = series[i];
|
|
|
|
executeHooks(hooks.processDatapoints, [s, s.datapoints]);
|
|
}
|
|
|
|
// second pass: find datamax/datamin for auto-scaling
|
|
for (i = 0; i < series.length; ++i) {
|
|
s = series[i];
|
|
points = s.datapoints.points;
|
|
ps = s.datapoints.pointsize;
|
|
format = s.datapoints.format;
|
|
|
|
var xmin = topSentry, ymin = topSentry,
|
|
xmax = bottomSentry, ymax = bottomSentry;
|
|
|
|
for (j = 0; j < points.length; j += ps) {
|
|
if (points[j] == null) {
|
|
continue;
|
|
}
|
|
|
|
for (m = 0; m < ps; ++m) {
|
|
val = points[j + m];
|
|
f = format[m];
|
|
if (!f || f.autoscale === false || val === fakeInfinity || val === -fakeInfinity) {
|
|
continue;
|
|
}
|
|
|
|
if (f.x) {
|
|
if (val < xmin) {
|
|
xmin = val;
|
|
}
|
|
if (val > xmax) {
|
|
xmax = val;
|
|
}
|
|
}
|
|
if (f.y) {
|
|
if (val < ymin) {
|
|
ymin = val;
|
|
}
|
|
if (val > ymax) {
|
|
ymax = val;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (s.bars.show) {
|
|
|
|
// make sure we got room for the bar on the dancing floor
|
|
var delta;
|
|
|
|
switch (s.bars.align) {
|
|
case "left":
|
|
delta = 0;
|
|
break;
|
|
case "right":
|
|
delta = -s.bars.barWidth;
|
|
break;
|
|
default:
|
|
delta = -s.bars.barWidth / 2;
|
|
}
|
|
|
|
if (s.bars.horizontal) {
|
|
ymin += delta;
|
|
ymax += delta + s.bars.barWidth;
|
|
} else {
|
|
xmin += delta;
|
|
xmax += delta + s.bars.barWidth;
|
|
}
|
|
}
|
|
|
|
updateAxis(s.xaxis, xmin, xmax);
|
|
updateAxis(s.yaxis, ymin, ymax);
|
|
}
|
|
|
|
$.each(allAxes(), function(_, axis) {
|
|
if (axis.datamin === topSentry) {
|
|
axis.datamin = null;
|
|
}
|
|
if (axis.datamax === bottomSentry) {
|
|
axis.datamax = null;
|
|
}
|
|
});
|
|
}
|
|
|
|
function setupCanvases() {
|
|
|
|
// Make sure the placeholder is clear of everything except canvases
|
|
// from a previous plot in this container that we'll try to re-use.
|
|
|
|
// padding messes up the positioning
|
|
placeholder.css("padding", 0)
|
|
.children().filter(function() {
|
|
return !$(this).hasClass("flot-overlay") && !$(this).hasClass("flot-base");
|
|
}).remove();
|
|
|
|
if (placeholder.css("position") === "static") {
|
|
|
|
// for positioning labels and overlay
|
|
placeholder.css("position", "relative");
|
|
}
|
|
|
|
surface = new Canvas("flot-base", placeholder);
|
|
|
|
// overlay canvas for interactive features
|
|
overlay = new Canvas("flot-overlay", placeholder);
|
|
|
|
ctx = surface.context;
|
|
octx = overlay.context;
|
|
|
|
// define which element we're listening for events on
|
|
eventHolder = $(overlay.element).unbind();
|
|
|
|
// If we're re-using a plot object, shut down the old one
|
|
var existing = placeholder.data("plot");
|
|
|
|
if (existing) {
|
|
existing.shutdown();
|
|
overlay.clear();
|
|
}
|
|
|
|
// save in case we get replotted
|
|
placeholder.data("plot", plot);
|
|
}
|
|
|
|
function bindEvents() {
|
|
|
|
// bind events
|
|
if (options.grid.hoverable) {
|
|
eventHolder.mousemove(onMouseMove);
|
|
|
|
// Use bind, rather than .mouseleave, because we officially
|
|
// still support jQuery 1.2.6, which doesn't define a shortcut
|
|
// for mouseenter or mouseleave. This was a bug/oversight that
|
|
// was fixed somewhere around 1.3.x. We can return to using
|
|
// .mouseleave when we drop support for 1.2.6.
|
|
eventHolder.bind("mouseleave", onMouseLeave);
|
|
}
|
|
|
|
if (options.grid.clickable) {
|
|
eventHolder.click(onClick);
|
|
}
|
|
|
|
executeHooks(hooks.bindEvents, [eventHolder]);
|
|
}
|
|
|
|
function shutdown() {
|
|
if (redrawTimeout) {
|
|
clearTimeout(redrawTimeout);
|
|
}
|
|
|
|
eventHolder.unbind("mousemove", onMouseMove);
|
|
eventHolder.unbind("mouseleave", onMouseLeave);
|
|
eventHolder.unbind("click", onClick);
|
|
|
|
executeHooks(hooks.shutdown, [eventHolder]);
|
|
}
|
|
|
|
function setTransformationHelpers(axis) {
|
|
|
|
// set helper functions on the axis, assumes plot area
|
|
// has been computed already
|
|
function identity(x) { return x; }
|
|
|
|
var s, m, t = axis.options.transform || identity,
|
|
it = axis.options.inverseTransform;
|
|
|
|
// precompute how much the axis is scaling a point
|
|
// in canvas space
|
|
if (axis.direction === "x") {
|
|
s = axis.scale = plotWidth / Math.abs(t(axis.max) - t(axis.min));
|
|
m = Math.min(t(axis.max), t(axis.min));
|
|
} else {
|
|
s = axis.scale = plotHeight / Math.abs(t(axis.max) - t(axis.min));
|
|
s = -s;
|
|
m = Math.max(t(axis.max), t(axis.min));
|
|
}
|
|
|
|
// data point to canvas coordinate
|
|
if (t === identity) {
|
|
|
|
// slight optimization
|
|
axis.p2c = function(p) { return (p - m) * s; };
|
|
} else {
|
|
axis.p2c = function(p) { return (t(p) - m) * s; };
|
|
}
|
|
|
|
// canvas coordinate to data point
|
|
if (!it) {
|
|
axis.c2p = function(c) { return m + c / s; };
|
|
} else {
|
|
axis.c2p = function(c) { return it(m + c / s); };
|
|
}
|
|
}
|
|
|
|
function measureTickLabels(axis) {
|
|
|
|
var opts = axis.options,
|
|
ticks = axis.ticks || [],
|
|
|
|
// Label width & height are deprecated; remove in 1.0!
|
|
tickWidth = opts.tickWidth || opts.labelWidth || 0,
|
|
tickHeight = opts.tickHeight || opts.labelHeight || 0,
|
|
maxWidth = tickWidth || axis.direction === "x" ? Math.floor(surface.width / (ticks.length || 1)) : null,
|
|
legacyStyles = axis.direction + "Axis " + axis.direction + axis.n + "Axis",
|
|
layer = "flot-" + axis.direction + "-axis flot-" + axis.direction + axis.n + "-axis " + legacyStyles,
|
|
font = opts.tickFont || "flot-tick-label tickLabel";
|
|
|
|
for (var i = 0; i < ticks.length; ++i) {
|
|
|
|
var t = ticks[i];
|
|
|
|
if (!t.label) {
|
|
continue;
|
|
}
|
|
|
|
var info = surface.getTextInfo(layer, t.label, font, null, maxWidth);
|
|
|
|
tickWidth = Math.max(tickWidth, info.width);
|
|
tickHeight = Math.max(tickHeight, info.height);
|
|
}
|
|
|
|
axis.tickWidth = opts.tickWidth || opts.labelWidth || tickWidth;
|
|
axis.tickHeight = opts.tickHeight || opts.labelHeight || tickHeight;
|
|
|
|
// Label width/height properties are deprecated; remove in 1.0!
|
|
axis.labelWidth = axis.tickWidth;
|
|
axis.labelHeight = axis.tickHeight;
|
|
}
|
|
|
|
/**
|
|
* Compute the axis bounding box based on the dimensions of its label
|
|
* and tick labels, then adjust the plotOffset to make room for it.
|
|
*
|
|
* This first phase only considers one dimension per axis; the other
|
|
* dimension depends on the other axes, and will be calculated later.
|
|
*/
|
|
function allocateAxisBoxFirstPhase(axis) {
|
|
|
|
var contentWidth = axis.tickWidth,
|
|
contentHeight = axis.tickHeight,
|
|
axisOptions = axis.options,
|
|
tickLength = axisOptions.tickLength,
|
|
axisPosition = axisOptions.position,
|
|
axisMargin = options.grid.axisMargin,
|
|
padding = options.grid.labelMargin,
|
|
isXAxis = axis.direction === "x",
|
|
innermost = true,
|
|
outermost = true,
|
|
first = true,
|
|
found = false;
|
|
|
|
// Determine the axis's position in its direction and on its side
|
|
$.each(isXAxis ? xaxes : yaxes, function(i, a) {
|
|
if (a && (a.show || a.reserveSpace)) {
|
|
if (a === axis) {
|
|
found = true;
|
|
} else if (a.options.position === axisPosition) {
|
|
if (found) {
|
|
outermost = false;
|
|
} else {
|
|
innermost = false;
|
|
}
|
|
}
|
|
if (!found) {
|
|
first = false;
|
|
}
|
|
}
|
|
});
|
|
|
|
// The outermost axis on each side has no margin
|
|
if (outermost) {
|
|
axisMargin = 0;
|
|
}
|
|
|
|
// The ticks for the first axis in each direction stretch across
|
|
if (tickLength == null) {
|
|
tickLength = first ? "full" : 5;
|
|
}
|
|
|
|
if (!isNaN(+tickLength)) {
|
|
padding += +tickLength;
|
|
}
|
|
|
|
// Measure the dimensions of the axis label, if it has one
|
|
if (axisOptions.label) {
|
|
var legacyStyles = "Axis " + axis.direction + axis.n + "Axis",
|
|
layer = "flot-" + axis.direction + "-axis flot-" + axis.direction + axis.n + "-axis " + axis.direction + legacyStyles,
|
|
font = axisOptions.labelFont || "flot-axis-label axisLabels " + axis.direction + axis.n + "axisLabel",
|
|
angle = isXAxis ? 0 : axisOptions.position === "right" ? 90 : -90,
|
|
labelInfo = surface.getTextInfo(layer, axisOptions.label, font, angle);
|
|
contentWidth += labelInfo.width + axisOptions.labelPadding;
|
|
contentHeight += labelInfo.height + axisOptions.labelPadding;
|
|
}
|
|
|
|
// Compute the axis bounding box and update the plot bounds
|
|
if (isXAxis) {
|
|
contentHeight += padding;
|
|
if (axisPosition === "top") {
|
|
axis.box = { top: plotOffset.top + axisMargin, height: contentHeight };
|
|
plotOffset.top += contentHeight + axisMargin;
|
|
} else {
|
|
plotOffset.bottom += contentHeight + axisMargin;
|
|
axis.box = { top: surface.height - plotOffset.bottom, height: contentHeight };
|
|
}
|
|
} else {
|
|
contentWidth += padding;
|
|
if (axisPosition === "right") {
|
|
plotOffset.right += contentWidth + axisMargin;
|
|
axis.box = { left: surface.width - plotOffset.right, width: contentWidth };
|
|
} else {
|
|
axis.box = { left: plotOffset.left + axisMargin, width: contentWidth };
|
|
plotOffset.left += contentWidth + axisMargin;
|
|
}
|
|
}
|
|
|
|
axis.position = axisPosition;
|
|
axis.tickLength = tickLength;
|
|
axis.box.padding = padding;
|
|
axis.innermost = innermost;
|
|
}
|
|
|
|
function allocateAxisBoxSecondPhase(axis) {
|
|
|
|
// now that all axis boxes have been placed in one
|
|
// dimension, we can set the remaining dimension coordinates
|
|
if (axis.direction === "x") {
|
|
axis.box.left = plotOffset.left - axis.tickWidth / 2;
|
|
axis.box.width = surface.width - plotOffset.left - plotOffset.right + axis.tickWidth;
|
|
} else {
|
|
axis.box.top = plotOffset.top - axis.tickHeight / 2;
|
|
axis.box.height = surface.height - plotOffset.bottom - plotOffset.top + axis.tickHeight;
|
|
}
|
|
}
|
|
|
|
function adjustLayoutForThingsStickingOut() {
|
|
|
|
// possibly adjust plot offset to ensure everything stays
|
|
// inside the canvas and isn't clipped off
|
|
var minMargin = options.grid.minBorderMargin;
|
|
|
|
// check stuff from the plot (FIXME: this should just read
|
|
// a value from the series, otherwise it's impossible to
|
|
// customize)
|
|
if (minMargin == null) {
|
|
minMargin = 0;
|
|
for (var i = 0; i < series.length; ++i) {
|
|
minMargin = Math.max(minMargin, 2 * (series[i].points.radius + series[i].points.lineWidth / 2));
|
|
}
|
|
}
|
|
|
|
var margins = {
|
|
left: minMargin,
|
|
right: minMargin,
|
|
top: minMargin,
|
|
bottom: minMargin
|
|
};
|
|
|
|
// check axis labels, note we don't check the actual
|
|
// labels but instead use the overall width/height to not
|
|
// jump as much around with replots
|
|
$.each(allAxes(), function(_, axis) {
|
|
if (axis.reserveSpace && axis.ticks && axis.ticks.length) {
|
|
if (axis.direction === "x") {
|
|
margins.left = Math.max(margins.left, axis.tickWidth / 2);
|
|
margins.right = Math.max(margins.right, axis.tickWidth / 2);
|
|
} else {
|
|
margins.bottom = Math.max(margins.bottom, axis.tickHeight / 2);
|
|
margins.top = Math.max(margins.top, axis.tickHeight / 2);
|
|
}
|
|
}
|
|
});
|
|
|
|
plotOffset.left = Math.ceil(Math.max(margins.left, plotOffset.left));
|
|
plotOffset.right = Math.ceil(Math.max(margins.right, plotOffset.right));
|
|
plotOffset.top = Math.ceil(Math.max(margins.top, plotOffset.top));
|
|
plotOffset.bottom = Math.ceil(Math.max(margins.bottom, plotOffset.bottom));
|
|
}
|
|
|
|
function setupGrid() {
|
|
var axes = allAxes(),
|
|
showGrid = options.grid.show,
|
|
margin = options.grid.margin || 0,
|
|
i, a;
|
|
|
|
// Initialize the plot's offset from the edge of the canvas
|
|
for (a in plotOffset) {
|
|
if (Object.prototype.hasOwnProperty.call(plotOffset, a)) {
|
|
plotOffset[a] = isNumeric(margin) ? margin : margin[a] || 0;
|
|
}
|
|
}
|
|
|
|
executeHooks(hooks.processOffset, [plotOffset]);
|
|
|
|
// If the grid is visible, add its border width to the offset
|
|
for (a in plotOffset) {
|
|
if (typeof(options.grid.borderWidth) === "object") {
|
|
plotOffset[a] += showGrid ? options.grid.borderWidth[a] : 0;
|
|
} else {
|
|
plotOffset[a] += showGrid ? options.grid.borderWidth : 0;
|
|
}
|
|
}
|
|
|
|
$.each(axes, function(_, axis) {
|
|
var axisOpts = axis.options;
|
|
axis.show = axisOpts.show == null ? axis.used : axisOpts.show;
|
|
axis.reserveSpace = axisOpts.reserveSpace == null ? axis.show : axisOpts.reserveSpace;
|
|
setRange(axis);
|
|
});
|
|
|
|
if (showGrid) {
|
|
|
|
var allocatedAxes = $.grep(axes, function(axis) {
|
|
return axis.show || axis.reserveSpace;
|
|
});
|
|
|
|
$.each(allocatedAxes, function(_, axis) {
|
|
// make the ticks
|
|
setupTickGeneration(axis);
|
|
setTicks(axis);
|
|
snapRangeToTicks(axis, axis.ticks);
|
|
measureTickLabels(axis);
|
|
});
|
|
|
|
// with all dimensions calculated, we can compute the
|
|
// axis bounding boxes, start from the outside
|
|
// (reverse order)
|
|
for (i = allocatedAxes.length - 1; i >= 0; --i) {
|
|
allocateAxisBoxFirstPhase(allocatedAxes[i]);
|
|
}
|
|
|
|
// make sure we've got enough space for things that
|
|
// might stick out
|
|
adjustLayoutForThingsStickingOut();
|
|
|
|
$.each(allocatedAxes, function(_, axis) {
|
|
allocateAxisBoxSecondPhase(axis);
|
|
});
|
|
}
|
|
|
|
plotWidth = surface.width - plotOffset.left - plotOffset.right;
|
|
plotHeight = surface.height - plotOffset.bottom - plotOffset.top;
|
|
|
|
// now we got the proper plot dimensions, we can compute the scaling
|
|
$.each(axes, function(_, axis) {
|
|
setTransformationHelpers(axis);
|
|
});
|
|
|
|
if (showGrid) {
|
|
drawAxisLabels();
|
|
}
|
|
|
|
insertLegend();
|
|
}
|
|
|
|
function setRange(axis) {
|
|
var opts = axis.options,
|
|
min = +(opts.min != null ? opts.min : axis.datamin),
|
|
max = +(opts.max != null ? opts.max : axis.datamax),
|
|
delta = max - min;
|
|
|
|
if (delta === 0.0) {
|
|
|
|
// degenerate case
|
|
var widen = max === 0 ? 1 : 0.01;
|
|
|
|
if (opts.min == null) {
|
|
min -= widen;
|
|
}
|
|
|
|
// always widen max if we couldn't widen min to ensure we
|
|
// don't fall into min == max which doesn't work
|
|
|
|
if (opts.max == null || opts.min != null) {
|
|
max += widen;
|
|
}
|
|
} else {
|
|
|
|
// consider autoscaling
|
|
var margin = opts.autoscaleMargin;
|
|
if (margin != null) {
|
|
if (opts.min == null) {
|
|
min -= delta * margin;
|
|
|
|
// make sure we don't go below zero if all values
|
|
// are positive
|
|
if (min < 0 && axis.datamin != null && axis.datamin >= 0) {
|
|
min = 0;
|
|
}
|
|
}
|
|
if (opts.max == null) {
|
|
max += delta * margin;
|
|
if (max > 0 && axis.datamax != null && axis.datamax <= 0) {
|
|
max = 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
axis.min = min;
|
|
axis.max = max;
|
|
}
|
|
|
|
function setupTickGeneration(axis) {
|
|
var opts = axis.options,
|
|
|
|
// estimate number of ticks
|
|
noTicks;
|
|
|
|
if (isNumeric(opts.ticks) && opts.ticks > 0) {
|
|
noTicks = opts.ticks;
|
|
} else {
|
|
|
|
// heuristic based on the model a*sqrt(x) fitted to
|
|
// some data points that seemed reasonable
|
|
noTicks = 0.3 * Math.sqrt(axis.direction === "x" ? surface.width : surface.height);
|
|
}
|
|
|
|
var delta = (axis.max - axis.min) / noTicks,
|
|
dec = -Math.floor(Math.log(delta) / Math.LN10),
|
|
maxDec = opts.tickDecimals;
|
|
|
|
if (maxDec != null && dec > maxDec) {
|
|
dec = maxDec;
|
|
}
|
|
|
|
var magn = Math.pow(10, -dec),
|
|
|
|
// norm is between 1.0 and 10.0
|
|
norm = delta / magn,
|
|
size;
|
|
|
|
if (norm < 1.5) {
|
|
size = 1;
|
|
} else if (norm < 3) {
|
|
size = 2;
|
|
|
|
// special case for 2.5, requires an extra decimal
|
|
if (norm > 2.25 && (maxDec == null || dec + 1 <= maxDec)) {
|
|
size = 2.5;
|
|
++dec;
|
|
}
|
|
} else if (norm < 7.5) {
|
|
size = 5;
|
|
} else {
|
|
size = 10;
|
|
}
|
|
|
|
size *= magn;
|
|
|
|
if (opts.minTickSize != null && size < opts.minTickSize) {
|
|
size = opts.minTickSize;
|
|
}
|
|
|
|
axis.delta = delta;
|
|
axis.tickDecimals = Math.max(0, maxDec != null ? maxDec : dec);
|
|
axis.tickSize = opts.tickSize || size;
|
|
|
|
// Time mode was moved to a plug-in in 0.8, but since so many people use this
|
|
// we'll add an especially friendly make sure they remembered to include it.
|
|
if (opts.mode === "time" && !axis.tickGenerator) {
|
|
throw new Error("Time mode requires the flot.time plugin.");
|
|
}
|
|
|
|
// Flot supports base-10 axes; any other mode else is handled by a plug-in,
|
|
// like flot.time.js.
|
|
if (!axis.tickGenerator) {
|
|
|
|
axis.tickGenerator = function(axis) {
|
|
|
|
var ticks = [],
|
|
start = floorInBase(axis.min, axis.tickSize),
|
|
i = 0,
|
|
v = Number.NaN,
|
|
prev;
|
|
|
|
do {
|
|
prev = v;
|
|
v = start + i * axis.tickSize;
|
|
ticks.push(v);
|
|
++i;
|
|
} while (v < axis.max && v !== prev);
|
|
return ticks;
|
|
};
|
|
|
|
axis.tickFormatter = function(value, axis) {
|
|
|
|
var factor = axis.tickDecimals ? Math.pow(10, axis.tickDecimals) : 1,
|
|
formatted = "" + Math.round(value * factor) / factor;
|
|
|
|
// If tickDecimals was specified, ensure that we have exactly that
|
|
// much precision; otherwise default to the value's own precision.
|
|
if (axis.tickDecimals != null) {
|
|
var decimal = formatted.indexOf("."),
|
|
precision = decimal === -1 ? 0 : formatted.length - decimal - 1;
|
|
|
|
if (precision < axis.tickDecimals) {
|
|
return (precision ? formatted : formatted + ".") + ("" + factor).substr(1, axis.tickDecimals - precision);
|
|
}
|
|
}
|
|
|
|
return formatted;
|
|
};
|
|
}
|
|
|
|
if ($.isFunction(opts.tickFormatter)) {
|
|
axis.tickFormatter = function(v, axis) { return "" + opts.tickFormatter(v, axis); };
|
|
}
|
|
|
|
if (opts.alignTicksWithAxis != null) {
|
|
var otherAxis = (axis.direction === "x" ? xaxes : yaxes)[opts.alignTicksWithAxis - 1];
|
|
if (otherAxis && otherAxis.used && otherAxis !== axis) {
|
|
|
|
// consider snapping min/max to outermost nice ticks
|
|
var niceTicks = axis.tickGenerator(axis);
|
|
if (niceTicks.length > 0) {
|
|
if (opts.min == null) {
|
|
axis.min = Math.min(axis.min, niceTicks[0]);
|
|
}
|
|
if (opts.max == null && niceTicks.length > 1) {
|
|
axis.max = Math.max(axis.max, niceTicks[niceTicks.length - 1]);
|
|
}
|
|
}
|
|
|
|
axis.tickGenerator = function(axis) {
|
|
|
|
// copy ticks, scaled to this axis
|
|
var ticks = [], v, i;
|
|
for (i = 0; i < otherAxis.ticks.length; ++i) {
|
|
v = (otherAxis.ticks[i].v - otherAxis.min) / (otherAxis.max - otherAxis.min);
|
|
v = axis.min + v * (axis.max - axis.min);
|
|
ticks.push(v);
|
|
}
|
|
return ticks;
|
|
};
|
|
|
|
// we might need an extra decimal since forced
|
|
// ticks don't necessarily fit naturally
|
|
if (!axis.mode && opts.tickDecimals == null) {
|
|
var extraDec = Math.max(0, -Math.floor(Math.log(axis.delta) / Math.LN10) + 1),
|
|
ts = axis.tickGenerator(axis);
|
|
|
|
// only proceed if the tick interval rounded
|
|
// with an extra decimal doesn't give us a
|
|
// zero at end
|
|
if (!(ts.length > 1 && /\..*0$/.test((ts[1] - ts[0]).toFixed(extraDec)))) {
|
|
axis.tickDecimals = extraDec;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
function setTicks(axis) {
|
|
var oticks = axis.options.ticks, ticks = [];
|
|
if (oticks == null || (isNumeric(oticks) && oticks > 0)) {
|
|
ticks = axis.tickGenerator(axis);
|
|
} else if (oticks) {
|
|
if ($.isFunction(oticks)) {
|
|
|
|
// generate the ticks
|
|
ticks = oticks(axis);
|
|
} else {
|
|
ticks = oticks;
|
|
}
|
|
}
|
|
|
|
// clean up/labelify the supplied ticks, copy them over
|
|
var i, v;
|
|
axis.ticks = [];
|
|
for (i = 0; i < ticks.length; ++i) {
|
|
var label = null,
|
|
t = ticks[i];
|
|
|
|
if (typeof t === "object") {
|
|
v = +t[0];
|
|
if (t.length > 1) {
|
|
label = t[1];
|
|
}
|
|
} else {
|
|
v = +t;
|
|
}
|
|
if (label == null) {
|
|
label = axis.tickFormatter(v, axis);
|
|
}
|
|
if (!isNaN(v)) {
|
|
axis.ticks.push({ v: v, label: label });
|
|
}
|
|
}
|
|
}
|
|
|
|
function snapRangeToTicks(axis, ticks) {
|
|
if (axis.options.autoscaleMargin && ticks.length > 0) {
|
|
|
|
// snap to ticks
|
|
if (axis.options.min == null) {
|
|
axis.min = Math.min(axis.min, ticks[0].v);
|
|
}
|
|
if (axis.options.max == null && ticks.length > 1) {
|
|
axis.max = Math.max(axis.max, ticks[ticks.length - 1].v);
|
|
}
|
|
}
|
|
}
|
|
|
|
function draw() {
|
|
|
|
surface.clear();
|
|
|
|
executeHooks(hooks.drawBackground, [ctx]);
|
|
|
|
var grid = options.grid;
|
|
|
|
// draw background, if any
|
|
if (grid.show && grid.backgroundColor) {
|
|
drawBackground();
|
|
}
|
|
|
|
if (grid.show && !grid.aboveData) {
|
|
drawGrid();
|
|
}
|
|
|
|
for (var i = 0; i < series.length; ++i) {
|
|
executeHooks(hooks.drawSeries, [ctx, series[i]]);
|
|
drawSeries(series[i]);
|
|
}
|
|
|
|
executeHooks(hooks.draw, [ctx]);
|
|
|
|
if (grid.show && grid.aboveData) {
|
|
drawGrid();
|
|
}
|
|
|
|
surface.render();
|
|
|
|
// A draw implies that either the axes or data have changed, so we
|
|
// should probably update the overlay highlights as well.
|
|
|
|
triggerRedrawOverlay();
|
|
}
|
|
|
|
function extractRange(ranges, coord) {
|
|
var axis, from, to, key, axes = allAxes();
|
|
|
|
for (var i = 0; i < axes.length; ++i) {
|
|
axis = axes[i];
|
|
if (axis.direction === coord) {
|
|
key = coord + axis.n + "axis";
|
|
if (!ranges[key] && axis.n === 1) {
|
|
|
|
// support x1axis as xaxis
|
|
key = coord + "axis";
|
|
}
|
|
if (ranges[key]) {
|
|
from = ranges[key].from;
|
|
to = ranges[key].to;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// backwards-compat stuff - to be removed in future
|
|
if (!ranges[key]) {
|
|
axis = coord === "x" ? xaxes[0] : yaxes[0];
|
|
from = ranges[coord + "1"];
|
|
to = ranges[coord + "2"];
|
|
}
|
|
|
|
// auto-reverse as an added bonus
|
|
if (from != null && to != null && from > to) {
|
|
var tmp = from;
|
|
from = to;
|
|
to = tmp;
|
|
}
|
|
|
|
return { from: from, to: to, axis: axis };
|
|
}
|
|
|
|
function drawBackground() {
|
|
ctx.save();
|
|
ctx.translate(plotOffset.left, plotOffset.top);
|
|
|
|
ctx.fillStyle = getColorOrGradient(options.grid.backgroundColor, plotHeight, 0, "rgba(255, 255, 255, 0)");
|
|
ctx.fillRect(0, 0, plotWidth, plotHeight);
|
|
ctx.restore();
|
|
}
|
|
|
|
function drawGrid() {
|
|
var i, axes, bw, bc;
|
|
|
|
ctx.save();
|
|
ctx.translate(plotOffset.left, plotOffset.top);
|
|
|
|
var markingLayer = "flot-markings";
|
|
surface.removeText(markingLayer);
|
|
|
|
// process markings
|
|
var markingsUnderGrid = [],
|
|
markingsAboveGrid = [],
|
|
markings = options.grid.markings;
|
|
|
|
if (markings) {
|
|
if ($.isFunction(markings)) {
|
|
axes = plot.getAxes();
|
|
|
|
// xmin etc. is backwards compatibility, to be
|
|
// removed in the future
|
|
axes.xmin = axes.xaxis.min;
|
|
axes.xmax = axes.xaxis.max;
|
|
axes.ymin = axes.yaxis.min;
|
|
axes.ymax = axes.yaxis.max;
|
|
|
|
markings = markings(axes);
|
|
}
|
|
|
|
for (i = 0; i < markings.length; ++i) {
|
|
var m = markings[i];
|
|
|
|
if (m.aboveGrid) {
|
|
markingsAboveGrid.push(m);
|
|
} else {
|
|
markingsUnderGrid.push(m);
|
|
}
|
|
}
|
|
}
|
|
|
|
drawMarkings(markingsUnderGrid, markingLayer);
|
|
|
|
// draw the ticks
|
|
axes = allAxes();
|
|
bw = options.grid.borderWidth;
|
|
|
|
for (var j = 0; j < axes.length; ++j) {
|
|
var axis = axes[j], box = axis.box,
|
|
t = axis.tickLength, x, y, xoff, yoff;
|
|
if (!axis.show || axis.ticks.length === 0) {
|
|
continue;
|
|
}
|
|
|
|
ctx.lineWidth = 1;
|
|
|
|
// find the edges
|
|
if (axis.direction === "x") {
|
|
x = 0;
|
|
if (t === "full") {
|
|
y = (axis.position === "top" ? 0 : plotHeight);
|
|
} else {
|
|
y = box.top - plotOffset.top + (axis.position === "top" ? box.height : 0);
|
|
}
|
|
} else {
|
|
y = 0;
|
|
if (t === "full") {
|
|
x = (axis.position === "left" ? 0 : plotWidth);
|
|
} else {
|
|
x = box.left - plotOffset.left + (axis.position === "left" ? box.width : 0);
|
|
}
|
|
}
|
|
|
|
// draw tick bar
|
|
if (!axis.innermost) {
|
|
ctx.strokeStyle = axis.options.color;
|
|
ctx.beginPath();
|
|
xoff = yoff = 0;
|
|
if (axis.direction === "x") {
|
|
xoff = plotWidth + 1;
|
|
} else {
|
|
yoff = plotHeight + 1;
|
|
}
|
|
|
|
if (ctx.lineWidth === 1) {
|
|
if (axis.direction === "x") {
|
|
y = Math.floor(y) + 0.5;
|
|
} else {
|
|
x = Math.floor(x) + 0.5;
|
|
}
|
|
}
|
|
|
|
ctx.moveTo(x, y);
|
|
ctx.lineTo(x + xoff, y + yoff);
|
|
ctx.stroke();
|
|
}
|
|
|
|
// draw ticks
|
|
ctx.strokeStyle = axis.options.tickColor;
|
|
|
|
ctx.beginPath();
|
|
for (i = 0; i < axis.ticks.length; ++i) {
|
|
var v = axis.ticks[i].v;
|
|
|
|
xoff = yoff = 0;
|
|
|
|
if (isNaN(v) || v < axis.min || v > axis.max || (
|
|
|
|
// skip those lying on the axes if we got a border
|
|
t === "full" && ((typeof bw === "object" && bw[axis.position] > 0) || bw > 0) &&
|
|
(v === axis.min || v === axis.max)
|
|
)) {
|
|
continue;
|
|
}
|
|
|
|
if (axis.direction === "x") {
|
|
x = axis.p2c(v);
|
|
yoff = t === "full" ? -plotHeight : t;
|
|
|
|
if (axis.position === "top") {
|
|
yoff = -yoff;
|
|
}
|
|
} else {
|
|
y = axis.p2c(v);
|
|
xoff = t === "full" ? -plotWidth : t;
|
|
|
|
if (axis.position === "left") {
|
|
xoff = -xoff;
|
|
}
|
|
}
|
|
|
|
if (ctx.lineWidth === 1) {
|
|
if (axis.direction === "x") {
|
|
x = Math.floor(x) + 0.5;
|
|
} else {
|
|
y = Math.floor(y) + 0.5;
|
|
}
|
|
}
|
|
|
|
ctx.moveTo(x, y);
|
|
ctx.lineTo(x + xoff, y + yoff);
|
|
}
|
|
|
|
ctx.stroke();
|
|
}
|
|
|
|
drawMarkings(markingsAboveGrid, markingLayer);
|
|
|
|
// draw border
|
|
if (bw) {
|
|
|
|
// If either borderWidth or borderColor is an object, then draw the border
|
|
// line by line instead of as one rectangle
|
|
bc = options.grid.borderColor;
|
|
if (typeof bw === "object" || typeof bc === "object") {
|
|
if (typeof bw !== "object") {
|
|
bw = { top: bw, right: bw, bottom: bw, left: bw };
|
|
}
|
|
if (typeof bc !== "object") {
|
|
bc = { top: bc, right: bc, bottom: bc, left: bc };
|
|
}
|
|
|
|
if (bw.top > 0) {
|
|
ctx.strokeStyle = bc.top;
|
|
ctx.lineWidth = bw.top;
|
|
ctx.beginPath();
|
|
ctx.moveTo(0 - bw.left, 0 - bw.top / 2);
|
|
ctx.lineTo(plotWidth, 0 - bw.top / 2);
|
|
ctx.stroke();
|
|
}
|
|
|
|
if (bw.right > 0) {
|
|
ctx.strokeStyle = bc.right;
|
|
ctx.lineWidth = bw.right;
|
|
ctx.beginPath();
|
|
ctx.moveTo(plotWidth + bw.right / 2, 0 - bw.top);
|
|
ctx.lineTo(plotWidth + bw.right / 2, plotHeight);
|
|
ctx.stroke();
|
|
}
|
|
|
|
if (bw.bottom > 0) {
|
|
ctx.strokeStyle = bc.bottom;
|
|
ctx.lineWidth = bw.bottom;
|
|
ctx.beginPath();
|
|
ctx.moveTo(plotWidth + bw.right, plotHeight + bw.bottom / 2);
|
|
ctx.lineTo(0, plotHeight + bw.bottom / 2);
|
|
ctx.stroke();
|
|
}
|
|
|
|
if (bw.left > 0) {
|
|
ctx.strokeStyle = bc.left;
|
|
ctx.lineWidth = bw.left;
|
|
ctx.beginPath();
|
|
ctx.moveTo(0 - bw.left / 2, plotHeight + bw.bottom);
|
|
ctx.lineTo(0 - bw.left / 2, 0);
|
|
ctx.stroke();
|
|
}
|
|
} else {
|
|
ctx.lineWidth = bw;
|
|
ctx.strokeStyle = options.grid.borderColor;
|
|
ctx.strokeRect(-bw / 2, -bw / 2, plotWidth + bw, plotHeight + bw);
|
|
}
|
|
}
|
|
|
|
ctx.restore();
|
|
}
|
|
|
|
function drawMarkings(markings, markingLayer) {
|
|
if (!markings) {
|
|
return;
|
|
}
|
|
|
|
for (var i = 0; i < markings.length; i++) {
|
|
drawMarking(markings[i], markingLayer);
|
|
}
|
|
}
|
|
|
|
function drawMarking(m, markingLayer) {
|
|
var xrange = extractRange(m, "x"),
|
|
yrange = extractRange(m, "y");
|
|
|
|
// fill in missing
|
|
if (xrange.from == null) {
|
|
xrange.from = xrange.axis.min;
|
|
}
|
|
if (xrange.to == null) {
|
|
xrange.to = xrange.axis.max;
|
|
}
|
|
if (yrange.from == null) {
|
|
yrange.from = yrange.axis.min;
|
|
}
|
|
if (yrange.to == null) {
|
|
yrange.to = yrange.axis.max;
|
|
}
|
|
|
|
// clip
|
|
if (xrange.to < xrange.axis.min || xrange.from > xrange.axis.max ||
|
|
yrange.to < yrange.axis.min || yrange.from > yrange.axis.max) {
|
|
return;
|
|
}
|
|
|
|
xrange.from = Math.max(xrange.from, xrange.axis.min);
|
|
xrange.to = Math.min(xrange.to, xrange.axis.max);
|
|
yrange.from = Math.max(yrange.from, yrange.axis.min);
|
|
yrange.to = Math.min(yrange.to, yrange.axis.max);
|
|
|
|
var xequal = xrange.from === xrange.to,
|
|
yequal = yrange.from === yrange.to;
|
|
|
|
if (xequal && yequal) {
|
|
return;
|
|
}
|
|
|
|
// then draw
|
|
xrange.from = Math.floor(xrange.axis.p2c(xrange.from));
|
|
xrange.to = Math.floor(xrange.axis.p2c(xrange.to));
|
|
yrange.from = Math.floor(yrange.axis.p2c(yrange.from));
|
|
yrange.to = Math.floor(yrange.axis.p2c(yrange.to));
|
|
|
|
if (xequal || yequal) {
|
|
var lineWidth = m.lineWidth || options.grid.markingsLineWidth,
|
|
subPixel = lineWidth % 2 ? 0.5 : 0;
|
|
ctx.beginPath();
|
|
ctx.strokeStyle = m.color || options.grid.markingsColor;
|
|
ctx.lineWidth = lineWidth;
|
|
if (xequal) {
|
|
ctx.moveTo(xrange.to + subPixel, yrange.from);
|
|
ctx.lineTo(xrange.to + subPixel, yrange.to);
|
|
} else {
|
|
ctx.moveTo(xrange.from, yrange.to + subPixel);
|
|
ctx.lineTo(xrange.to, yrange.to + subPixel);
|
|
}
|
|
ctx.stroke();
|
|
} else {
|
|
ctx.fillStyle = m.color || options.grid.markingsColor;
|
|
if (m.rounded) {
|
|
roundRect(
|
|
ctx, xrange.from, yrange.to, xrange.to - xrange.from,
|
|
yrange.from - yrange.to, m.rounded);
|
|
ctx.fill();
|
|
} else {
|
|
ctx.fillRect(
|
|
xrange.from, yrange.to, xrange.to - xrange.from,
|
|
yrange.from - yrange.to);
|
|
}
|
|
}
|
|
|
|
if (m.text) {
|
|
|
|
// left aligned horizontal position:
|
|
var xPos = xrange.from + plotOffset.left,
|
|
|
|
// top baselined vertical position:
|
|
yPos = (yrange.to + plotOffset.top);
|
|
|
|
if (!!m.textAlign) {
|
|
switch (m.textAlign.toLowerCase()) {
|
|
case "right":
|
|
xPos = xrange.to + plotOffset.left;
|
|
break;
|
|
case "center":
|
|
xPos = (xrange.from + plotOffset.left + xrange.to + plotOffset.left) / 2;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!!m.textBaseline) {
|
|
switch (m.textBaseline.toLowerCase()) {
|
|
case "bottom":
|
|
yPos = (yrange.from + plotOffset.top);
|
|
break;
|
|
case "middle":
|
|
yPos = (yrange.from + plotOffset.top + yrange.to + plotOffset.top) / 2;
|
|
break;
|
|
}
|
|
}
|
|
|
|
surface.addText(markingLayer, xPos, yPos, m.text, m.font || "flot-marking", 0, null, m.textAlign, m.textBaseline);
|
|
}
|
|
}
|
|
|
|
function drawAxisLabels() {
|
|
|
|
$.each(allAxes(), function(_, axis) {
|
|
|
|
var box = axis.box,
|
|
axisOptions = axis.options,
|
|
legacyStyles = axis.direction + "Axis " + axis.direction + axis.n + "Axis",
|
|
layer = "flot-" + axis.direction + "-axis flot-" + axis.direction + axis.n + "-axis " + legacyStyles,
|
|
labelFont = axisOptions.labelFont || "flot-axis-label axisLabels " + axis.direction + axis.n + "axisLabel",
|
|
tickFont = axisOptions.tickFont || "flot-tick-label tickLabel",
|
|
tick, x, y, halign, valign;
|
|
|
|
// Remove text before checking for axis.show and ticks.length;
|
|
// otherwise plugins, like flot-tickrotor, that draw their own
|
|
// tick labels will end up with both theirs and the defaults.
|
|
surface.removeText(layer);
|
|
|
|
if (!axis.show || axis.ticks.length === 0) {
|
|
return;
|
|
}
|
|
|
|
if (axisOptions.label) {
|
|
if (axis.direction === "x") {
|
|
if (axisOptions.position === "top") {
|
|
surface.addText(layer, box.left + box.width / 2, box.top, axisOptions.label, labelFont, 0, null, "center", "top");
|
|
} else {
|
|
surface.addText(layer, box.left + box.width / 2, box.top + box.height, axisOptions.label, labelFont, 0, null, "center", "bottom");
|
|
}
|
|
} else {
|
|
if (axisOptions.position === "right") {
|
|
surface.addText(layer, box.left + box.width, box.top + box.height / 2, axisOptions.label, labelFont, 90, null, "right", "middle");
|
|
} else {
|
|
surface.addText(layer, box.left, box.top + box.height / 2, axisOptions.label, labelFont, -90, null, "left", "middle");
|
|
}
|
|
}
|
|
}
|
|
|
|
// Add labels for the ticks on this axis
|
|
for (var i = 0; i < axis.ticks.length; ++i) {
|
|
|
|
tick = axis.ticks[i];
|
|
if (!tick.label || tick.v < axis.min || tick.v > axis.max) {
|
|
continue;
|
|
}
|
|
|
|
if (axis.direction === "x") {
|
|
halign = "center";
|
|
x = plotOffset.left + axis.p2c(tick.v);
|
|
if (axis.position === "bottom") {
|
|
y = box.top + box.padding;
|
|
} else {
|
|
y = box.top + box.height - box.padding;
|
|
valign = "bottom";
|
|
}
|
|
} else {
|
|
valign = "middle";
|
|
y = plotOffset.top + axis.p2c(tick.v);
|
|
if (axis.position === "left") {
|
|
x = box.left + box.width - box.padding;
|
|
halign = "right";
|
|
} else {
|
|
x = box.left + box.padding;
|
|
}
|
|
}
|
|
|
|
surface.addText(layer, x, y, tick.label, tickFont, null, null, halign, valign);
|
|
}
|
|
});
|
|
}
|
|
|
|
function drawSeries(series) {
|
|
if (series.lines.show) {
|
|
drawSeriesLines(series);
|
|
}
|
|
if (series.bars.show) {
|
|
drawSeriesBars(series);
|
|
}
|
|
if (series.points.show) {
|
|
drawSeriesPoints(series);
|
|
}
|
|
}
|
|
|
|
function drawSeriesLines(series) {
|
|
function plotLine(datapoints, xoffset, yoffset, axisx, axisy) {
|
|
var points = datapoints.points,
|
|
ps = datapoints.pointsize,
|
|
showSteps = series.lines.steps,
|
|
prevx = null, prevy = null;
|
|
|
|
ctx.beginPath();
|
|
for (var i = ps; i < points.length; i += ps) {
|
|
var x1 = points[i - ps], y1 = points[i - ps + 1],
|
|
x2 = points[i], y2 = points[i + 1];
|
|
|
|
if (x1 == null || x2 == null) {
|
|
continue;
|
|
}
|
|
|
|
// clip with ymin
|
|
if (y1 <= y2 && y1 < axisy.min) {
|
|
if (y2 < axisy.min) {
|
|
|
|
// line segment is outside
|
|
continue;
|
|
}
|
|
|
|
// compute new intersection point
|
|
x1 = showSteps ? x2 : (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1;
|
|
y1 = axisy.min;
|
|
} else if (y2 <= y1 && y2 < axisy.min) {
|
|
if (y1 < axisy.min) {
|
|
continue;
|
|
}
|
|
x2 = showSteps ? x2 : (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1;
|
|
y2 = axisy.min;
|
|
}
|
|
|
|
// clip with ymax
|
|
if (y1 >= y2 && y1 > axisy.max) {
|
|
if (y2 > axisy.max) {
|
|
continue;
|
|
}
|
|
x1 = showSteps ? x2 : (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1;
|
|
y1 = axisy.max;
|
|
} else if (y2 >= y1 && y2 > axisy.max) {
|
|
if (y1 > axisy.max) {
|
|
continue;
|
|
}
|
|
x2 = showSteps ? x2 : (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1;
|
|
y2 = axisy.max;
|
|
}
|
|
|
|
// clip with xmin
|
|
if (x1 <= x2 && x1 < axisx.min) {
|
|
if (x2 < axisx.min) {
|
|
continue;
|
|
}
|
|
y1 = showSteps ? y1 : (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1;
|
|
x1 = axisx.min;
|
|
} else if (x2 <= x1 && x2 < axisx.min) {
|
|
if (x1 < axisx.min) {
|
|
continue;
|
|
}
|
|
y2 = showSteps ? y1 : (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1;
|
|
x2 = axisx.min;
|
|
}
|
|
|
|
// clip with xmax
|
|
if (x1 >= x2 && x1 > axisx.max) {
|
|
if (x2 > axisx.max) {
|
|
continue;
|
|
}
|
|
y1 = showSteps ? y1 : (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1;
|
|
x1 = axisx.max;
|
|
} else if (x2 >= x1 && x2 > axisx.max) {
|
|
if (x1 > axisx.max) {
|
|
continue;
|
|
}
|
|
y2 = showSteps ? y1 : (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1;
|
|
x2 = axisx.max;
|
|
}
|
|
|
|
if (x1 !== prevx || y1 !== prevy) {
|
|
ctx.moveTo(axisx.p2c(x1) + xoffset, axisy.p2c(y1) + yoffset);
|
|
}
|
|
|
|
prevx = x2;
|
|
prevy = y2;
|
|
|
|
// Draw a step
|
|
if (showSteps) {
|
|
if (x1 < x2) {
|
|
ctx.lineTo(axisx.p2c(x2) + xoffset, axisy.p2c(y1) + yoffset);
|
|
} else {
|
|
ctx.lineTo(axisx.p2c(x1) + xoffset, axisy.p2c(y2) + yoffset);
|
|
}
|
|
}
|
|
ctx.lineTo(axisx.p2c(x2) + xoffset, axisy.p2c(y2) + yoffset);
|
|
}
|
|
ctx.stroke();
|
|
}
|
|
|
|
function plotLineArea(datapoints, axisx, axisy) {
|
|
var points = datapoints.points,
|
|
ps = datapoints.pointsize,
|
|
showSteps = series.lines.steps,
|
|
bottom = Math.min(Math.max(0, axisy.min), axisy.max),
|
|
i = 0, areaOpen = false,
|
|
ypos = 1, segmentStart = 0, segmentEnd = 0;
|
|
|
|
// we process each segment in two turns, first forward
|
|
// direction to sketch out top, then once we hit the
|
|
// end we go backwards to sketch the bottom
|
|
while (true) {
|
|
if (ps > 0 && i > points.length + ps) {
|
|
break;
|
|
}
|
|
|
|
// ps is negative if going backwards
|
|
i += ps;
|
|
|
|
var x1 = points[i - ps],
|
|
y1 = points[i - ps + ypos],
|
|
x2 = points[i], y2 = points[i + ypos];
|
|
|
|
if (areaOpen) {
|
|
if (ps > 0 && x1 != null && x2 == null) {
|
|
|
|
// at turning point
|
|
segmentEnd = i;
|
|
ps = -ps;
|
|
ypos = 2;
|
|
continue;
|
|
}
|
|
|
|
if (ps < 0 && i === segmentStart + ps) {
|
|
|
|
// done with the reverse sweep
|
|
ctx.fill();
|
|
areaOpen = false;
|
|
ps = -ps;
|
|
ypos = 1;
|
|
i = segmentStart = segmentEnd + ps;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (x1 == null || x2 == null) {
|
|
continue;
|
|
}
|
|
|
|
// clip x values
|
|
|
|
// clip with xmin
|
|
if (x1 <= x2 && x1 < axisx.min) {
|
|
if (x2 < axisx.min) {
|
|
continue;
|
|
}
|
|
y1 = showSteps ? y1 : (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1;
|
|
x1 = axisx.min;
|
|
} else if (x2 <= x1 && x2 < axisx.min) {
|
|
if (x1 < axisx.min) {
|
|
continue;
|
|
}
|
|
y2 = showSteps ? y1 : (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1;
|
|
x2 = axisx.min;
|
|
}
|
|
|
|
// clip with xmax
|
|
if (x1 >= x2 && x1 > axisx.max) {
|
|
if (x2 > axisx.max) {
|
|
continue;
|
|
}
|
|
y1 = showSteps ? y1 : (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1;
|
|
x1 = axisx.max;
|
|
} else if (x2 >= x1 && x2 > axisx.max) {
|
|
if (x1 > axisx.max) {
|
|
continue;
|
|
}
|
|
y2 = showSteps ? y1 : (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1;
|
|
x2 = axisx.max;
|
|
}
|
|
|
|
if (!areaOpen) {
|
|
|
|
// open area
|
|
ctx.beginPath();
|
|
ctx.moveTo(axisx.p2c(x1), axisy.p2c(bottom));
|
|
areaOpen = true;
|
|
}
|
|
|
|
// now first check the case where both is outside
|
|
if (y1 >= axisy.max && y2 >= axisy.max) {
|
|
ctx.lineTo(axisx.p2c(x1), axisy.p2c(axisy.max));
|
|
ctx.lineTo(axisx.p2c(x2), axisy.p2c(axisy.max));
|
|
continue;
|
|
} else if (y1 <= axisy.min && y2 <= axisy.min) {
|
|
ctx.lineTo(axisx.p2c(x1), axisy.p2c(axisy.min));
|
|
ctx.lineTo(axisx.p2c(x2), axisy.p2c(axisy.min));
|
|
continue;
|
|
}
|
|
|
|
// else it's a bit more complicated, there might
|
|
// be a flat maxed out rectangle first, then a
|
|
// triangular cutout or reverse; to find these
|
|
// keep track of the current x values
|
|
var x1old = x1, x2old = x2;
|
|
|
|
// clip the y values, without shortcutting, we
|
|
// go through all cases in turn
|
|
|
|
// clip with ymin
|
|
if (y1 <= y2 && y1 < axisy.min && y2 >= axisy.min) {
|
|
x1 = showSteps ? x2 : (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1;
|
|
y1 = axisy.min;
|
|
} else if (y2 <= y1 && y2 < axisy.min && y1 >= axisy.min) {
|
|
x2 = showSteps ? x2 : (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1;
|
|
y2 = axisy.min;
|
|
}
|
|
|
|
// clip with ymax
|
|
if (y1 >= y2 && y1 > axisy.max && y2 <= axisy.max) {
|
|
x1 = showSteps ? x2 : (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1;
|
|
y1 = axisy.max;
|
|
} else if (y2 >= y1 && y2 > axisy.max && y1 <= axisy.max) {
|
|
x2 = showSteps ? x2 : (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1;
|
|
y2 = axisy.max;
|
|
}
|
|
|
|
// if the x value was changed we got a rectangle to fill
|
|
if (x1 !== x1old) {
|
|
|
|
// it goes to (x1, y1), but we fill that below
|
|
ctx.lineTo(axisx.p2c(x1old), axisy.p2c(y1));
|
|
}
|
|
|
|
// fill triangular section, this sometimes result
|
|
// in redundant points if (x1, y1) hasn't changed
|
|
// from previous line to, but we just ignore that
|
|
ctx.lineTo(axisx.p2c(x1), axisy.p2c(y1));
|
|
|
|
// Draw a step
|
|
if (showSteps) {
|
|
if (x1 < x2) {
|
|
ctx.lineTo(axisx.p2c(x2), axisy.p2c(y1));
|
|
} else {
|
|
ctx.lineTo(axisx.p2c(x1), axisy.p2c(y2));
|
|
}
|
|
}
|
|
ctx.lineTo(axisx.p2c(x2), axisy.p2c(y2));
|
|
|
|
// fill the other rectangle if it's there
|
|
if (x2 !== x2old) {
|
|
ctx.lineTo(axisx.p2c(x2), axisy.p2c(y2));
|
|
ctx.lineTo(axisx.p2c(x2old), axisy.p2c(y2));
|
|
}
|
|
}
|
|
}
|
|
|
|
ctx.save();
|
|
ctx.translate(plotOffset.left, plotOffset.top);
|
|
ctx.lineJoin = "round";
|
|
|
|
var lw = series.lines.lineWidth,
|
|
sw = series.shadowSize;
|
|
|
|
// FIXME: consider another form of shadow when filling is turned on
|
|
if (lw > 0 && sw > 0) {
|
|
|
|
// draw shadow as a thick and thin line with transparency
|
|
ctx.lineWidth = sw;
|
|
ctx.strokeStyle = "rgba(0,0,0,0.1)";
|
|
|
|
// position shadow at angle from the mid of line
|
|
var angle = Math.PI / 18;
|
|
plotLine(series.datapoints, Math.sin(angle) * (lw / 2 + sw / 2), Math.cos(angle) * (lw / 2 + sw / 2), series.xaxis, series.yaxis);
|
|
ctx.lineWidth = sw / 2;
|
|
plotLine(series.datapoints, Math.sin(angle) * (lw / 2 + sw / 4), Math.cos(angle) * (lw / 2 + sw / 4), series.xaxis, series.yaxis);
|
|
}
|
|
|
|
ctx.lineWidth = lw;
|
|
ctx.strokeStyle = series.color;
|
|
var fillStyle = getFillStyle(series.lines, series.color, 0, plotHeight);
|
|
if (fillStyle) {
|
|
ctx.fillStyle = fillStyle;
|
|
plotLineArea(series.datapoints, series.xaxis, series.yaxis);
|
|
}
|
|
|
|
if (lw > 0) {
|
|
plotLine(series.datapoints, 0, 0, series.xaxis, series.yaxis);
|
|
}
|
|
ctx.restore();
|
|
}
|
|
|
|
function drawSeriesPoints(series) {
|
|
function plotPoints(datapoints, radius, fillStyle, offset, shadow, axisx, axisy, symbol) {
|
|
var points = datapoints.points, ps = datapoints.pointsize;
|
|
|
|
for (var i = 0; i < points.length; i += ps) {
|
|
var x = points[i], y = points[i + 1];
|
|
if (x == null || x < axisx.min || x > axisx.max || y < axisy.min || y > axisy.max) {
|
|
continue;
|
|
}
|
|
|
|
ctx.beginPath();
|
|
x = axisx.p2c(x);
|
|
y = axisy.p2c(y) + offset;
|
|
if (symbol === "circle") {
|
|
ctx.arc(x, y, radius, 0, shadow ? Math.PI : Math.PI * 2, false);
|
|
} else {
|
|
symbol(ctx, x, y, radius, shadow);
|
|
}
|
|
ctx.closePath();
|
|
|
|
if (fillStyle) {
|
|
ctx.fillStyle = fillStyle;
|
|
ctx.fill();
|
|
}
|
|
ctx.stroke();
|
|
}
|
|
}
|
|
|
|
ctx.save();
|
|
ctx.translate(plotOffset.left, plotOffset.top);
|
|
|
|
var lw = series.points.lineWidth,
|
|
sw = series.shadowSize,
|
|
radius = series.points.radius,
|
|
symbol = series.points.symbol;
|
|
|
|
// If the user sets the line width to 0, we change it to a very
|
|
// small value. A line width of 0 seems to force the default of 1.
|
|
// Doing the conditional here allows the shadow setting to still be
|
|
// optional even with a lineWidth of 0.
|
|
if (lw === 0) {
|
|
lw = 0.0001;
|
|
}
|
|
|
|
if (lw > 0 && sw > 0) {
|
|
|
|
// draw shadow in two steps
|
|
var w = sw / 2;
|
|
ctx.lineWidth = w;
|
|
ctx.strokeStyle = "rgba(0,0,0,0.1)";
|
|
plotPoints(series.datapoints, radius, null, w + w / 2, true,
|
|
series.xaxis, series.yaxis, symbol);
|
|
|
|
ctx.strokeStyle = "rgba(0,0,0,0.2)";
|
|
plotPoints(series.datapoints, radius, null, w / 2, true,
|
|
series.xaxis, series.yaxis, symbol);
|
|
}
|
|
|
|
ctx.lineWidth = lw;
|
|
ctx.strokeStyle = series.points.strokeColor || series.color;
|
|
plotPoints(series.datapoints, radius,
|
|
getFillStyle(series.points, series.color), 0, false,
|
|
series.xaxis, series.yaxis, symbol);
|
|
ctx.restore();
|
|
}
|
|
|
|
function drawBar(x, y, b, barLeft, barRight, fillStyleCallback, axisx, axisy, c, horizontal, lineWidth) {
|
|
var left, right, bottom, top,
|
|
drawLeft, drawRight, drawTop, drawBottom,
|
|
tmp;
|
|
|
|
// in horizontal mode, we start the bar from the left
|
|
// instead of from the bottom so it appears to be
|
|
// horizontal rather than vertical
|
|
if (horizontal) {
|
|
drawBottom = drawRight = drawTop = true;
|
|
drawLeft = false;
|
|
left = b;
|
|
right = x;
|
|
top = y + barLeft;
|
|
bottom = y + barRight;
|
|
|
|
// account for negative bars
|
|
if (right < left) {
|
|
tmp = right;
|
|
right = left;
|
|
left = tmp;
|
|
drawLeft = true;
|
|
drawRight = false;
|
|
}
|
|
} else {
|
|
drawLeft = drawRight = drawTop = true;
|
|
drawBottom = false;
|
|
left = x + barLeft;
|
|
right = x + barRight;
|
|
bottom = b;
|
|
top = y;
|
|
|
|
// account for negative bars
|
|
if (top < bottom) {
|
|
tmp = top;
|
|
top = bottom;
|
|
bottom = tmp;
|
|
drawBottom = true;
|
|
drawTop = false;
|
|
}
|
|
}
|
|
|
|
// clip
|
|
if (right < axisx.min || left > axisx.max ||
|
|
top < axisy.min || bottom > axisy.max) {
|
|
return;
|
|
}
|
|
|
|
if (left < axisx.min) {
|
|
left = axisx.min;
|
|
drawLeft = false;
|
|
}
|
|
|
|
if (right > axisx.max) {
|
|
right = axisx.max;
|
|
drawRight = false;
|
|
}
|
|
|
|
if (bottom < axisy.min) {
|
|
bottom = axisy.min;
|
|
drawBottom = false;
|
|
}
|
|
|
|
if (top > axisy.max) {
|
|
top = axisy.max;
|
|
drawTop = false;
|
|
}
|
|
|
|
left = axisx.p2c(left);
|
|
bottom = axisy.p2c(bottom);
|
|
right = axisx.p2c(right);
|
|
top = axisy.p2c(top);
|
|
|
|
// fill the bar
|
|
if (fillStyleCallback) {
|
|
c.fillStyle = fillStyleCallback(bottom, top);
|
|
c.fillRect(left, top, right - left, bottom - top);
|
|
}
|
|
|
|
// draw outline
|
|
if (lineWidth > 0 && (drawLeft || drawRight || drawTop || drawBottom)) {
|
|
c.beginPath();
|
|
|
|
// FIXME: inline moveTo is buggy with excanvas
|
|
c.moveTo(left, bottom);
|
|
if (drawLeft) {
|
|
c.lineTo(left, top);
|
|
} else {
|
|
c.moveTo(left, top);
|
|
}
|
|
if (drawTop) {
|
|
c.lineTo(right, top);
|
|
} else {
|
|
c.moveTo(right, top);
|
|
}
|
|
if (drawRight) {
|
|
c.lineTo(right, bottom);
|
|
} else {
|
|
c.moveTo(right, bottom);
|
|
}
|
|
if (drawBottom) {
|
|
c.lineTo(left, bottom);
|
|
} else {
|
|
c.moveTo(left, bottom);
|
|
}
|
|
c.stroke();
|
|
}
|
|
}
|
|
|
|
function drawSeriesBars(series) {
|
|
function plotBars(datapoints, barLeft, barRight, fillStyleCallback, axisx, axisy) {
|
|
var points = datapoints.points, ps = datapoints.pointsize;
|
|
|
|
for (var i = 0; i < points.length; i += ps) {
|
|
if (points[i] == null) {
|
|
continue;
|
|
}
|
|
drawBar(points[i], points[i + 1], points[i + 2], barLeft, barRight, fillStyleCallback, axisx, axisy, ctx, series.bars.horizontal, series.bars.lineWidth);
|
|
}
|
|
}
|
|
|
|
ctx.save();
|
|
ctx.translate(plotOffset.left, plotOffset.top);
|
|
|
|
// FIXME: figure out a way to add shadows (for instance along the right edge)
|
|
ctx.lineWidth = series.bars.lineWidth;
|
|
ctx.strokeStyle = series.color;
|
|
|
|
var barLeft;
|
|
|
|
switch (series.bars.align) {
|
|
case "left":
|
|
barLeft = 0;
|
|
break;
|
|
case "right":
|
|
barLeft = -series.bars.barWidth;
|
|
break;
|
|
default:
|
|
barLeft = -series.bars.barWidth / 2;
|
|
}
|
|
|
|
var fillStyleCallback = series.bars.fill ? function(bottom, top) { return getFillStyle(series.bars, series.color, bottom, top); } : null;
|
|
plotBars(series.datapoints, barLeft, barLeft + series.bars.barWidth, fillStyleCallback, series.xaxis, series.yaxis);
|
|
ctx.restore();
|
|
}
|
|
|
|
function getFillStyle(filloptions, seriesColor, bottom, top) {
|
|
var fill = filloptions.fill;
|
|
if (!fill) {
|
|
return null;
|
|
}
|
|
|
|
if (filloptions.fillColor) {
|
|
return getColorOrGradient(filloptions.fillColor, bottom, top, seriesColor);
|
|
}
|
|
|
|
var c = $.color.parse(seriesColor);
|
|
c.a = isNumeric(fill) ? fill : 0.4;
|
|
c.normalize();
|
|
return c.toString();
|
|
}
|
|
|
|
function insertLegend() {
|
|
|
|
if (options.legend.container != null) {
|
|
$(options.legend.container).html("");
|
|
} else {
|
|
placeholder.find(".legend").remove();
|
|
}
|
|
|
|
if (!options.legend.show) {
|
|
return;
|
|
}
|
|
|
|
var entries = [], lf = options.legend.labelFormatter, s, label, i;
|
|
|
|
// Build a list of legend entries, with each having a label and a color
|
|
for (i = 0; i < series.length; ++i) {
|
|
s = series[i];
|
|
if (s.label) {
|
|
label = lf ? lf(s.label, s) : s.label;
|
|
if (label) {
|
|
entries.push({
|
|
label: label,
|
|
color: s.color
|
|
});
|
|
}
|
|
}
|
|
}
|
|
|
|
// No entries implies no legend
|
|
if (entries.length === 0) {
|
|
return;
|
|
}
|
|
|
|
// Sort the legend using either the default or a custom comparator
|
|
if (options.legend.sorted) {
|
|
if ($.isFunction(options.legend.sorted)) {
|
|
entries.sort(options.legend.sorted);
|
|
} else if (options.legend.sorted === "reverse") {
|
|
entries.reverse();
|
|
} else {
|
|
var ascending = options.legend.sorted !== "descending";
|
|
entries.sort(function(a, b) {
|
|
return a.label === b.label ? 0 : (
|
|
(a.label < b.label) !== ascending ? 1 : -1 // Logical XOR
|
|
);
|
|
});
|
|
}
|
|
}
|
|
|
|
// Generate markup for the list of entries, in their final order
|
|
var table = $("<table></table>").css({
|
|
"font-size": "smaller",
|
|
"color": options.grid.color
|
|
}), rowBuffer = null;
|
|
|
|
for (i = 0; i < entries.length; ++i) {
|
|
|
|
var entry = entries[i];
|
|
|
|
if (i % options.legend.noColumns === 0) {
|
|
if (rowBuffer !== null) {
|
|
table.append(rowBuffer);
|
|
}
|
|
rowBuffer = $("<tr></tr>");
|
|
}
|
|
|
|
var colorbox = $("<div></div>").css({
|
|
"width": "4px",
|
|
"height": 0,
|
|
"border": "5px solid " + entry.color,
|
|
"overflow": "hidden"
|
|
}),
|
|
|
|
borderbox = $("<div></div>").css({
|
|
"border": "1px solid " + options.legend.labelBoxBorderColor,
|
|
"padding": "1px"
|
|
});
|
|
|
|
rowBuffer.append(
|
|
$("<td></td>").addClass("legendColorBox").append(borderbox.append(colorbox)),
|
|
$("<td></td>").addClass("legendLabel").html(entry.label)
|
|
);
|
|
}
|
|
|
|
table.append(rowBuffer);
|
|
|
|
if (options.legend.container != null) {
|
|
$(options.legend.container).html(table);
|
|
} else {
|
|
var pos = { "position": "absolute" },
|
|
p = options.legend.position,
|
|
m = options.legend.margin;
|
|
if (m[0] == null) {
|
|
m = [m, m];
|
|
}
|
|
if (p.charAt(0) === "n") {
|
|
pos.top = (m[1] + plotOffset.top) + "px";
|
|
} else if (p.charAt(0) === "s") {
|
|
pos.bottom = (m[1] + plotOffset.bottom) + "px";
|
|
}
|
|
if (p.charAt(1) === "e") {
|
|
pos.right = (m[0] + plotOffset.right) + "px";
|
|
} else if (p.charAt(1) === "w") {
|
|
pos.left = (m[0] + plotOffset.left) + "px";
|
|
}
|
|
var legend = $("<div></div>").addClass("legend").append(table.css(pos)).appendTo(placeholder);
|
|
if (options.legend.backgroundOpacity !== 0.0) {
|
|
|
|
// put in the transparent background
|
|
// separately to avoid blended labels and
|
|
// label boxes
|
|
var c = options.legend.backgroundColor;
|
|
if (c == null) {
|
|
c = options.grid.backgroundColor;
|
|
if (c && typeof c === "string") {
|
|
c = $.color.parse(c);
|
|
} else {
|
|
c = $.color.extract(legend, "background-color");
|
|
}
|
|
c.a = 1;
|
|
c = c.toString();
|
|
}
|
|
var div = legend.children();
|
|
|
|
// Position also applies to this
|
|
$("<div></div>").css(pos).css({
|
|
"width": div.width() + "px",
|
|
"height": div.height() + "px",
|
|
"background-color": c,
|
|
"opacity": options.legend.backgroundOpacity
|
|
}).prependTo(legend);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* returns the data item the mouse is over, or null if none is found
|
|
*/
|
|
function findNearbyItem(mouseX, mouseY, seriesFilter) {
|
|
var maxDistance = options.grid.mouseActiveRadius,
|
|
smallestDistance = maxDistance * maxDistance + 1,
|
|
item = null, i, j, ps;
|
|
|
|
for (i = series.length - 1; i >= 0; --i) {
|
|
if (!seriesFilter(series[i])) {
|
|
continue;
|
|
}
|
|
|
|
var s = series[i],
|
|
axisx = s.xaxis,
|
|
axisy = s.yaxis,
|
|
points = s.datapoints.points,
|
|
|
|
// precompute some stuff to make the loop faster
|
|
mx = axisx.c2p(mouseX),
|
|
my = axisy.c2p(mouseY),
|
|
maxx = maxDistance / axisx.scale,
|
|
maxy = maxDistance / axisy.scale,
|
|
x, y;
|
|
|
|
ps = s.datapoints.pointsize;
|
|
|
|
// with inverse transforms, we can't use the maxx/maxy
|
|
// optimization, sadly
|
|
if (axisx.options.inverseTransform) {
|
|
maxx = Number.MAX_VALUE;
|
|
}
|
|
if (axisy.options.inverseTransform) {
|
|
maxy = Number.MAX_VALUE;
|
|
}
|
|
|
|
if (s.lines.show || s.points.show) {
|
|
for (j = 0; j < points.length; j += ps) {
|
|
|
|
x = points[j];
|
|
y = points[j + 1];
|
|
|
|
if (x == null) {
|
|
continue;
|
|
}
|
|
|
|
// For points and lines, the cursor must be within a
|
|
// certain distance to the data point
|
|
if (x - mx > maxx || x - mx < -maxx ||
|
|
y - my > maxy || y - my < -maxy) {
|
|
continue;
|
|
}
|
|
|
|
// We have to calculate distances in pixels, not in
|
|
// data units, because the scales of the axes may be different
|
|
var dx = Math.abs(axisx.p2c(x) - mouseX),
|
|
dy = Math.abs(axisy.p2c(y) - mouseY),
|
|
dist = dx * dx + dy * dy; // we save the sqrt
|
|
|
|
// use <= to ensure last point takes precedence
|
|
// (last generally means on top of)
|
|
if (dist < smallestDistance) {
|
|
smallestDistance = dist;
|
|
item = [i, j / ps];
|
|
}
|
|
}
|
|
}
|
|
|
|
if (s.bars.show && !item) {
|
|
|
|
// no other point can be nearby
|
|
var barLeft, barRight;
|
|
|
|
switch (s.bars.align) {
|
|
case "left":
|
|
barLeft = 0;
|
|
break;
|
|
case "right":
|
|
barLeft = -s.bars.barWidth;
|
|
break;
|
|
default:
|
|
barLeft = -s.bars.barWidth / 2;
|
|
}
|
|
|
|
barRight = barLeft + s.bars.barWidth;
|
|
|
|
for (j = 0; j < points.length; j += ps) {
|
|
x = points[j];
|
|
y = points[j + 1];
|
|
var b = points[j + 2];
|
|
if (x == null) {
|
|
continue;
|
|
}
|
|
|
|
// for a bar graph, the cursor must be inside the bar
|
|
if (series[i].bars.horizontal ?
|
|
(mx <= Math.max(b, x) && mx >= Math.min(b, x) &&
|
|
my >= y + barLeft && my <= y + barRight) :
|
|
(mx >= x + barLeft && mx <= x + barRight &&
|
|
my >= Math.min(b, y) && my <= Math.max(b, y))) {
|
|
item = [i, j / ps];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (item) {
|
|
i = item[0];
|
|
j = item[1];
|
|
ps = series[i].datapoints.pointsize;
|
|
|
|
return { datapoint: series[i].datapoints.points.slice(j * ps, (j + 1) * ps),
|
|
dataIndex: j,
|
|
series: series[i],
|
|
seriesIndex: i };
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
function onMouseMove(e) {
|
|
if (options.grid.hoverable) {
|
|
triggerClickHoverEvent("plothover", e,
|
|
function(s) { return s.hoverable !== false; });
|
|
}
|
|
}
|
|
|
|
function onMouseLeave(e) {
|
|
if (options.grid.hoverable) {
|
|
triggerClickHoverEvent("plothover", e,
|
|
function() { return false; });
|
|
}
|
|
}
|
|
|
|
function onClick(e) {
|
|
triggerClickHoverEvent("plotclick", e,
|
|
function(s) { return s.clickable !== false; });
|
|
}
|
|
|
|
/**
|
|
* trigger click or hover event (they send the same parameters
|
|
* so we share their code)
|
|
*/
|
|
function triggerClickHoverEvent(eventname, event, seriesFilter) {
|
|
var offset = eventHolder.offset(),
|
|
canvasX = event.pageX - offset.left - plotOffset.left,
|
|
canvasY = event.pageY - offset.top - plotOffset.top,
|
|
pos = canvasToAxisCoords({ left: canvasX, top: canvasY });
|
|
|
|
pos.pageX = event.pageX;
|
|
pos.pageY = event.pageY;
|
|
|
|
var item = findNearbyItem(canvasX, canvasY, seriesFilter);
|
|
|
|
if (item) {
|
|
|
|
// fill in mouse pos for any listeners out there
|
|
item.pageX = parseInt(item.series.xaxis.p2c(item.datapoint[0]) + offset.left + plotOffset.left, 10);
|
|
item.pageY = parseInt(item.series.yaxis.p2c(item.datapoint[1]) + offset.top + plotOffset.top, 10);
|
|
}
|
|
|
|
if (options.grid.autoHighlight) {
|
|
|
|
// clear auto-highlights
|
|
for (var i = 0; i < highlights.length; ++i) {
|
|
var h = highlights[i];
|
|
if (h.auto === eventname && !(
|
|
item && h.series === item.series &&
|
|
h.point[0] === item.datapoint[0] &&
|
|
h.point[1] === item.datapoint[1]
|
|
)) {
|
|
unhighlight(h.series, h.point);
|
|
}
|
|
}
|
|
|
|
if (item) {
|
|
highlight(item.series, item.datapoint, eventname);
|
|
}
|
|
}
|
|
|
|
placeholder.trigger(eventname, [pos, item]);
|
|
}
|
|
|
|
function triggerRedrawOverlay() {
|
|
var t = options.interaction.redrawOverlayInterval;
|
|
|
|
if (t === -1) {
|
|
|
|
// skip event queue
|
|
drawOverlay();
|
|
return;
|
|
}
|
|
|
|
if (!redrawTimeout) {
|
|
redrawTimeout = setTimeout(drawOverlay, t);
|
|
}
|
|
}
|
|
|
|
function drawOverlay() {
|
|
redrawTimeout = null;
|
|
|
|
// draw highlights
|
|
octx.save();
|
|
overlay.clear();
|
|
octx.translate(plotOffset.left, plotOffset.top);
|
|
|
|
var i, hi;
|
|
for (i = 0; i < highlights.length; ++i) {
|
|
hi = highlights[i];
|
|
|
|
if (hi.series.bars.show) {
|
|
drawBarHighlight(hi.series, hi.point);
|
|
} else {
|
|
drawPointHighlight(hi.series, hi.point);
|
|
}
|
|
}
|
|
octx.restore();
|
|
|
|
executeHooks(hooks.drawOverlay, [octx]);
|
|
}
|
|
|
|
function highlight(s, point, auto) {
|
|
if (isNumeric(s)) {
|
|
s = series[s];
|
|
}
|
|
|
|
if (isNumeric(point)) {
|
|
var ps = s.datapoints.pointsize;
|
|
point = s.datapoints.points.slice(ps * point, ps * (point + 1));
|
|
}
|
|
|
|
var i = indexOfHighlight(s, point);
|
|
if (i === -1) {
|
|
highlights.push({ series: s, point: point, auto: auto });
|
|
triggerRedrawOverlay();
|
|
} else if (!auto) {
|
|
highlights[i].auto = false;
|
|
}
|
|
}
|
|
|
|
function unhighlight(s, point) {
|
|
if (s == null && point == null) {
|
|
highlights = [];
|
|
triggerRedrawOverlay();
|
|
return;
|
|
}
|
|
|
|
if (isNumeric(s)) {
|
|
s = series[s];
|
|
}
|
|
|
|
if (isNumeric(point)) {
|
|
var ps = s.datapoints.pointsize;
|
|
point = s.datapoints.points.slice(ps * point, ps * (point + 1));
|
|
}
|
|
|
|
var i = indexOfHighlight(s, point);
|
|
if (i !== -1) {
|
|
highlights.splice(i, 1);
|
|
triggerRedrawOverlay();
|
|
}
|
|
}
|
|
|
|
function indexOfHighlight(s, p) {
|
|
for (var i = 0; i < highlights.length; ++i) {
|
|
var h = highlights[i];
|
|
if (h.series === s && h.point[0] === p[0] && h.point[1] === p[1]) {
|
|
return i;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
function drawPointHighlight(series, point) {
|
|
var x = point[0], y = point[1],
|
|
axisx = series.xaxis, axisy = series.yaxis,
|
|
highlightColor = (typeof series.highlightColor === "string") ? series.highlightColor : $.color.parse(series.color).scale("a", 0.5).toString();
|
|
|
|
if (x < axisx.min || x > axisx.max || y < axisy.min || y > axisy.max) {
|
|
return;
|
|
}
|
|
|
|
var pointRadius, radius;
|
|
|
|
if (series.points.show) {
|
|
pointRadius = series.points.radius + series.points.lineWidth / 2;
|
|
radius = 1.5 * pointRadius;
|
|
} else {
|
|
pointRadius = series.points.radius;
|
|
radius = 0.5 * pointRadius;
|
|
}
|
|
octx.lineWidth = pointRadius;
|
|
octx.strokeStyle = highlightColor;
|
|
x = axisx.p2c(x);
|
|
y = axisy.p2c(y);
|
|
|
|
octx.beginPath();
|
|
if (series.points.symbol === "circle") {
|
|
octx.arc(x, y, radius, 0, 2 * Math.PI, false);
|
|
} else {
|
|
series.points.symbol(octx, x, y, radius, false);
|
|
}
|
|
octx.closePath();
|
|
octx.stroke();
|
|
}
|
|
|
|
function drawBarHighlight(series, point) {
|
|
var highlightColor = (typeof series.highlightColor === "string") ? series.highlightColor : $.color.parse(series.color).scale("a", 0.5).toString(),
|
|
fillStyle = highlightColor,
|
|
barLeft;
|
|
|
|
switch (series.bars.align) {
|
|
case "left":
|
|
barLeft = 0;
|
|
break;
|
|
case "right":
|
|
barLeft = -series.bars.barWidth;
|
|
break;
|
|
default:
|
|
barLeft = -series.bars.barWidth / 2;
|
|
}
|
|
|
|
octx.lineWidth = series.bars.lineWidth;
|
|
octx.strokeStyle = highlightColor;
|
|
|
|
drawBar(point[0], point[1], point[2] || 0, barLeft, barLeft + series.bars.barWidth,
|
|
function() { return fillStyle; }, series.xaxis, series.yaxis, octx, series.bars.horizontal, series.bars.lineWidth);
|
|
}
|
|
|
|
function getColorOrGradient(spec, bottom, top, defaultColor) {
|
|
if (typeof spec === "string") {
|
|
return spec;
|
|
} else {
|
|
|
|
// assume this is a gradient spec; IE currently only
|
|
// supports a simple vertical gradient properly, so that's
|
|
// what we support too
|
|
var gradient = ctx.createLinearGradient(0, top, 0, bottom);
|
|
|
|
for (var i = 0, l = spec.colors.length; i < l; ++i) {
|
|
var c = spec.colors[i];
|
|
if (typeof c !== "string") {
|
|
var co = $.color.parse(defaultColor);
|
|
if (c.brightness != null) {
|
|
co = co.scale("rgb", c.brightness);
|
|
}
|
|
if (c.opacity != null) {
|
|
co.a *= c.opacity;
|
|
}
|
|
c = co.toString();
|
|
}
|
|
gradient.addColorStop(i / (l - 1), c);
|
|
}
|
|
|
|
return gradient;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Add the plot function to the top level of the jQuery object
|
|
*/
|
|
$.plot = function(placeholder, data, options) {
|
|
var plot = new Plot($(placeholder), data, options, $.plot.plugins);
|
|
return plot;
|
|
};
|
|
|
|
$.plot.version = "0.9.0-alpha";
|
|
|
|
$.plot.plugins = [];
|
|
|
|
/**
|
|
* Also add the plot function as a chainable property
|
|
*/
|
|
$.fn.plot = function(data, options) {
|
|
return this.each(function() {
|
|
$.plot(this, data, options);
|
|
});
|
|
};
|
|
|
|
/**
|
|
* round to nearby lower multiple of base
|
|
*/
|
|
function floorInBase(n, base) {
|
|
return base * Math.floor(n / base);
|
|
}
|
|
|
|
/**
|
|
* Draw a rectangle with rounded corner on the canvas.
|
|
*
|
|
* @param {CanvasRenderingContext2D} ctx The canvas 2D context.
|
|
* @param {number} x The x-axis coordinate of the upper left corner of
|
|
* the rectangle to be drawn.
|
|
* @param {number} y The y-axis coordinate of the upper left corner of
|
|
* the rectangle to be drawn.
|
|
* @param {number} width The width of the rectangle to be drawn.
|
|
* @param {number} height The height of the rectangle to be drawn.
|
|
* @param {number} radius The radius of the corner of the rectangle
|
|
* to be drawn.
|
|
*/
|
|
function roundRect(ctx, x, y, width, height, radius) {
|
|
var r = x + width,
|
|
b = y + height;
|
|
|
|
ctx.beginPath();
|
|
ctx.moveTo(x + radius, y);
|
|
ctx.lineTo(r - radius, y);
|
|
ctx.quadraticCurveTo(r, y, r, y + radius);
|
|
ctx.lineTo(r, y + height - radius);
|
|
ctx.quadraticCurveTo(r, b, r - radius, b);
|
|
ctx.lineTo(x + radius, b);
|
|
ctx.quadraticCurveTo(x, b, x, b - radius);
|
|
ctx.lineTo(x, y + radius);
|
|
ctx.quadraticCurveTo(x, y, x + radius, y);
|
|
ctx.closePath();
|
|
return ctx;
|
|
}
|
|
|
|
})(jQuery);
|