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Update excanvas and remove previous eventholder work-around to fix hover/click bug in IE 8 (test case by Ara Anjargolian); add support for setting the redraw overlay period and set it to 60 frames/s

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pull/1/head
Ole Laursen 15 years ago
parent 9f060ec8e1
commit f6cebd3f13
4 changed files with 79 additions and 70 deletions
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9
API.txt
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@ -679,6 +679,10 @@ Customizing the grid
mouseActiveRadius: number
}
interaction: {
redrawOverlayInterval: number or -1
}
The grid is the thing with the axes and a number of ticks. Many of the
things in the grid are configured under the individual axes, but not
all. "color" is the color of the grid itself whereas "backgroundColor"
@ -798,6 +802,11 @@ If you want to disable interactivity for a specific data series, you
can set "hoverable" and "clickable" to false in the options for that
series, like this { data: [...], label: "Foo", clickable: false }.
"redrawOverlayInterval" specifies the maximum time to delay a redraw
of interactive things (this works as a rate limiting device). The
default is capped to 60 frames per second. You can set it to -1 to
disable the rate limiting.
Specifying gradients
====================

131
excanvas.js
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@ -49,6 +49,8 @@ if (!document.createElement('canvas').getContext) {
var Z = 10;
var Z2 = Z / 2;
var IE_VERSION = +navigator.userAgent.match(/MSIE ([\d.]+)?/)[1];
/**
* This funtion is assigned to the <canvas> elements as element.getContext().
* @this {HTMLElement}
@ -88,17 +90,15 @@ if (!document.createElement('canvas').getContext) {
return String(s).replace(/&/g, '&amp;').replace(/"/g, '&quot;');
}
function addNamespacesAndStylesheet(doc) {
// create xmlns
if (!doc.namespaces['g_vml_']) {
doc.namespaces.add('g_vml_', 'urn:schemas-microsoft-com:vml',
'#default#VML');
}
if (!doc.namespaces['g_o_']) {
doc.namespaces.add('g_o_', 'urn:schemas-microsoft-com:office:office',
'#default#VML');
function addNamespace(doc, prefix, urn) {
if (!doc.namespaces[prefix]) {
doc.namespaces.add(prefix, urn, '#default#VML');
}
}
function addNamespacesAndStylesheet(doc) {
addNamespace(doc, 'g_vml_', 'urn:schemas-microsoft-com:vml');
addNamespace(doc, 'g_o_', 'urn:schemas-microsoft-com:office:office');
// Setup default CSS. Only add one style sheet per document
if (!doc.styleSheets['ex_canvas_']) {
@ -115,13 +115,11 @@ if (!document.createElement('canvas').getContext) {
var G_vmlCanvasManager_ = {
init: function(opt_doc) {
if (/MSIE/.test(navigator.userAgent) && !window.opera) {
var doc = opt_doc || document;
// Create a dummy element so that IE will allow canvas elements to be
// recognized.
doc.createElement('canvas');
doc.attachEvent('onreadystatechange', bind(this.init_, this, doc));
}
var doc = opt_doc || document;
// Create a dummy element so that IE will allow canvas elements to be
// recognized.
doc.createElement('canvas');
doc.attachEvent('onreadystatechange', bind(this.init_, this, doc));
},
init_: function(doc) {
@ -398,9 +396,7 @@ if (!document.createElement('canvas').getContext) {
var end = styleString.indexOf(')', start + 1);
var parts = styleString.substring(start + 1, end).split(',');
// add alpha if needed
if (parts.length == 4 && styleString.substr(3, 1) == 'a') {
alpha = Number(parts[3]);
} else {
if (parts.length != 4 || styleString.charAt(3) != 'a') {
parts[3] = 1;
}
return parts;
@ -415,7 +411,7 @@ if (!document.createElement('canvas').getContext) {
}
function hslToRgb(parts){
var r, g, b;
var r, g, b, h, s, l;
h = parseFloat(parts[0]) / 360 % 360;
if (h < 0)
h++;
@ -452,7 +448,13 @@ if (!document.createElement('canvas').getContext) {
return m1;
}
var processStyleCache = {};
function processStyle(styleString) {
if (styleString in processStyleCache) {
return processStyleCache[styleString];
}
var str, alpha = 1;
styleString = String(styleString);
@ -465,11 +467,11 @@ if (!document.createElement('canvas').getContext) {
if (parts[i].indexOf('%') != -1) {
n = Math.floor(percent(parts[i]) * 255);
} else {
n = Number(parts[i]);
n = +parts[i];
}
str += decToHex[clamp(n, 0, 255)];
}
alpha = parts[3];
alpha = +parts[3];
} else if (/^hsl/.test(styleString)) {
var parts = getRgbHslContent(styleString);
str = hslToRgb(parts);
@ -477,7 +479,7 @@ if (!document.createElement('canvas').getContext) {
} else {
str = colorData[styleString] || styleString;
}
return {color: str, alpha: alpha};
return processStyleCache[styleString] = {color: str, alpha: alpha};
}
var DEFAULT_STYLE = {
@ -550,25 +552,22 @@ if (!document.createElement('canvas').getContext) {
style.size + 'px ' + style.family;
}
var lineCapMap = {
'butt': 'flat',
'round': 'round'
};
function processLineCap(lineCap) {
switch (lineCap) {
case 'butt':
return 'flat';
case 'round':
return 'round';
case 'square':
default:
return 'square';
}
return lineCapMap[lineCap] || 'square';
}
/**
* This class implements CanvasRenderingContext2D interface as described by
* the WHATWG.
* @param {HTMLElement} surfaceElement The element that the 2D context should
* @param {HTMLElement} canvasElement The element that the 2D context should
* be associated with
*/
function CanvasRenderingContext2D_(surfaceElement) {
function CanvasRenderingContext2D_(canvasElement) {
this.m_ = createMatrixIdentity();
this.mStack_ = [];
@ -587,14 +586,19 @@ if (!document.createElement('canvas').getContext) {
this.font = '10px sans-serif';
this.textAlign = 'left';
this.textBaseline = 'alphabetic';
this.canvas = surfaceElement;
this.canvas = canvasElement;
var cssText = 'width:' + canvasElement.clientWidth + 'px;height:' +
canvasElement.clientHeight + 'px;overflow:hidden;position:absolute';
var el = canvasElement.ownerDocument.createElement('div');
el.style.cssText = cssText;
canvasElement.appendChild(el);
var el = surfaceElement.ownerDocument.createElement('div');
el.style.width = surfaceElement.clientWidth + 'px';
el.style.height = surfaceElement.clientHeight + 'px';
el.style.overflow = 'hidden';
el.style.position = 'absolute';
surfaceElement.appendChild(el);
var overlayEl = el.cloneNode(false);
// Use a non transparent background.
overlayEl.style.backgroundColor = 'red';
overlayEl.style.filter = 'alpha(opacity=0)';
canvasElement.appendChild(overlayEl);
this.element_ = el;
this.arcScaleX_ = 1;
@ -618,14 +622,14 @@ if (!document.createElement('canvas').getContext) {
};
contextPrototype.moveTo = function(aX, aY) {
var p = this.getCoords_(aX, aY);
var p = getCoords(this, aX, aY);
this.currentPath_.push({type: 'moveTo', x: p.x, y: p.y});
this.currentX_ = p.x;
this.currentY_ = p.y;
};
contextPrototype.lineTo = function(aX, aY) {
var p = this.getCoords_(aX, aY);
var p = getCoords(this, aX, aY);
this.currentPath_.push({type: 'lineTo', x: p.x, y: p.y});
this.currentX_ = p.x;
@ -635,9 +639,9 @@ if (!document.createElement('canvas').getContext) {
contextPrototype.bezierCurveTo = function(aCP1x, aCP1y,
aCP2x, aCP2y,
aX, aY) {
var p = this.getCoords_(aX, aY);
var cp1 = this.getCoords_(aCP1x, aCP1y);
var cp2 = this.getCoords_(aCP2x, aCP2y);
var p = getCoords(this, aX, aY);
var cp1 = getCoords(this, aCP1x, aCP1y);
var cp2 = getCoords(this, aCP2x, aCP2y);
bezierCurveTo(this, cp1, cp2, p);
};
@ -660,8 +664,8 @@ if (!document.createElement('canvas').getContext) {
// the following is lifted almost directly from
// http://developer.mozilla.org/en/docs/Canvas_tutorial:Drawing_shapes
var cp = this.getCoords_(aCPx, aCPy);
var p = this.getCoords_(aX, aY);
var cp = getCoords(this, aCPx, aCPy);
var p = getCoords(this, aX, aY);
var cp1 = {
x: this.currentX_ + 2.0 / 3.0 * (cp.x - this.currentX_),
@ -692,9 +696,9 @@ if (!document.createElement('canvas').getContext) {
// that can be represented in binary
}
var p = this.getCoords_(aX, aY);
var pStart = this.getCoords_(xStart, yStart);
var pEnd = this.getCoords_(xEnd, yEnd);
var p = getCoords(this, aX, aY);
var pStart = getCoords(this, xStart, yStart);
var pEnd = getCoords(this, xEnd, yEnd);
this.currentPath_.push({type: arcType,
x: p.x,
@ -808,7 +812,7 @@ if (!document.createElement('canvas').getContext) {
throw Error('Invalid number of arguments');
}
var d = this.getCoords_(dx, dy);
var d = getCoords(this, dx, dy);
var w2 = sw / 2;
var h2 = sh / 2;
@ -844,9 +848,9 @@ if (!document.createElement('canvas').getContext) {
// Bounding box calculation (need to minimize displayed area so that
// filters don't waste time on unused pixels.
var max = d;
var c2 = this.getCoords_(dx + dw, dy);
var c3 = this.getCoords_(dx, dy + dh);
var c4 = this.getCoords_(dx + dw, dy + dh);
var c2 = getCoords(this, dx + dw, dy);
var c3 = getCoords(this, dx, dy + dh);
var c4 = getCoords(this, dx + dw, dy + dh);
max.x = m.max(max.x, c2.x, c3.x, c4.x);
max.y = m.max(max.y, c2.y, c3.y, c4.y);
@ -1015,8 +1019,8 @@ if (!document.createElement('canvas').getContext) {
var y0 = fillStyle.y0_ / arcScaleY;
var x1 = fillStyle.x1_ / arcScaleX;
var y1 = fillStyle.y1_ / arcScaleY;
var p0 = ctx.getCoords_(x0, y0);
var p1 = ctx.getCoords_(x1, y1);
var p0 = getCoords(ctx, x0, y0);
var p1 = getCoords(ctx, x1, y1);
var dx = p1.x - p0.x;
var dy = p1.y - p0.y;
angle = Math.atan2(dx, dy) * 180 / Math.PI;
@ -1032,7 +1036,7 @@ if (!document.createElement('canvas').getContext) {
angle = 0;
}
} else {
var p0 = ctx.getCoords_(fillStyle.x0_, fillStyle.y0_);
var p0 = getCoords(ctx, fillStyle.x0_, fillStyle.y0_);
focus = {
x: (p0.x - min.x) / width,
y: (p0.y - min.y) / height
@ -1105,11 +1109,8 @@ if (!document.createElement('canvas').getContext) {
this.currentPath_.push({type: 'close'});
};
/**
* @private
*/
contextPrototype.getCoords_ = function(aX, aY) {
var m = this.m_;
function getCoords(ctx, aX, aY) {
var m = ctx.m_;
return {
x: Z * (aX * m[0][0] + aY * m[1][0] + m[2][0]) - Z2,
y: Z * (aX * m[0][1] + aY * m[1][1] + m[2][1]) - Z2
@ -1270,7 +1271,7 @@ if (!document.createElement('canvas').getContext) {
break;
}
var d = this.getCoords_(x + offset.x, y + offset.y);
var d = getCoords(this, x + offset.x, y + offset.y);
lineStr.push('<g_vml_:line from="', -left ,' 0" to="', right ,' 0.05" ',
' coordsize="100 100" coordorigin="0 0"',

2
excanvas.min.js vendored
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7
jquery.flot.js
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@ -764,9 +764,8 @@
ctx = canvas.getContext("2d");
octx = overlay.getContext("2d");
// we include the canvas in the event holder too, because IE 7
// sometimes has trouble with the stacking order
eventHolder = $([overlay, canvas]);
// define which element we're listening for events on
eventHolder = $(overlay);
if (reused) {
// run shutdown in the old plot object
@ -2434,7 +2433,7 @@
function triggerRedrawOverlay() {
if (!redrawTimeout)
redrawTimeout = setTimeout(drawOverlay, 30);
redrawTimeout = setTimeout(drawOverlay, 1000/60);
}
function drawOverlay() {

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