Round tick positions to avoid fractions

git-svn-id: https://flot.googlecode.com/svn/trunk@147 1e0a6537-2640-0410-bfb7-f154510ff394

NEWS.txt

@@ -96,6 +96,8 @@ Bug fixes:
   Fabien Menager).
 - Changed the shadow code for lines to hopefully look a bit better
   with vertical lines.
+- Round tick positions to avoid possible problems with fractions
+  (suggestion by Fred, issue 130).
 
 
 Flot 0.5

jquery.flot.js

@@ -1149,20 +1149,20 @@
             var margin = options.grid.labelMargin + options.grid.borderWidth;
             
             addLabels(axes.xaxis, function (tick, axis) {
-                return '<div style="position:absolute;top:' + (plotOffset.top + plotHeight + margin) + 'px;left:' + (plotOffset.left + axis.p2c(tick.v) - axis.labelWidth/2) + 'px;width:' + axis.labelWidth + 'px;text-align:center" class="tickLabel">' + tick.label + "</div>";
+                return '<div style="position:absolute;top:' + (plotOffset.top + plotHeight + margin) + 'px;left:' + Math.round(plotOffset.left + axis.p2c(tick.v) - axis.labelWidth/2) + 'px;width:' + axis.labelWidth + 'px;text-align:center" class="tickLabel">' + tick.label + "</div>";
             });
             
             
             addLabels(axes.yaxis, function (tick, axis) {
-                return '<div style="position:absolute;top:' + (plotOffset.top + axis.p2c(tick.v) - axis.labelHeight/2) + 'px;right:' + (plotOffset.right + plotWidth + margin) + 'px;width:' + axis.labelWidth + 'px;text-align:right" class="tickLabel">' + tick.label + "</div>";
+                return '<div style="position:absolute;top:' + Math.round(plotOffset.top + axis.p2c(tick.v) - axis.labelHeight/2) + 'px;right:' + (plotOffset.right + plotWidth + margin) + 'px;width:' + axis.labelWidth + 'px;text-align:right" class="tickLabel">' + tick.label + "</div>";
             });
             
             addLabels(axes.x2axis, function (tick, axis) {
-                return '<div style="position:absolute;bottom:' + (plotOffset.bottom + plotHeight + margin) + 'px;left:' + (plotOffset.left + axis.p2c(tick.v) - axis.labelWidth/2) + 'px;width:' + axis.labelWidth + 'px;text-align:center" class="tickLabel">' + tick.label + "</div>";
+                return '<div style="position:absolute;bottom:' + (plotOffset.bottom + plotHeight + margin) + 'px;left:' + Math.round(plotOffset.left + axis.p2c(tick.v) - axis.labelWidth/2) + 'px;width:' + axis.labelWidth + 'px;text-align:center" class="tickLabel">' + tick.label + "</div>";
             });
             
             addLabels(axes.y2axis, function (tick, axis) {
-                return '<div style="position:absolute;top:' + (plotOffset.top + axis.p2c(tick.v) - axis.labelHeight/2) + 'px;left:' + (plotOffset.left + plotWidth + margin) +'px;width:' + axis.labelWidth + 'px;text-align:left" class="tickLabel">' + tick.label + "</div>";
+                return '<div style="position:absolute;top:' + Math.round(plotOffset.top + axis.p2c(tick.v) - axis.labelHeight/2) + 'px;left:' + (plotOffset.left + plotWidth + margin) +'px;width:' + axis.labelWidth + 'px;text-align:left" class="tickLabel">' + tick.label + "</div>";
             });
 
             html.push('</div>');