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The JWebSwing implementation for JQPlot Plugin
/**
* jqPlot
* Pure JavaScript plotting plugin using jQuery
*
* Version: 1.0.9
* Revision: d96a669
*
* Copyright (c) 2009-2016 Chris Leonello
* jqPlot is currently available for use in all personal or commercial projects
* under both the MIT (http://www.opensource.org/licenses/mit-license.php) and GPL
* version 2.0 (http://www.gnu.org/licenses/gpl-2.0.html) licenses. This means that you can
* choose the license that best suits your project and use it accordingly.
*
* Although not required, the author would appreciate an email letting him
* know of any substantial use of jqPlot. You can reach the author at:
* chris at jqplot dot com or see http://www.jqplot.com/info.php .
*
* If you are feeling kind and generous, consider supporting the project by
* making a donation at: http://www.jqplot.com/donate.php .
*
* sprintf functions contained in jqplot.sprintf.js by Ash Searle:
*
* version 2007.04.27
* author Ash Searle
* http://hexmen.com/blog/2007/03/printf-sprintf/
* http://hexmen.com/js/sprintf.js
* The author (Ash Searle) has placed this code in the public domain:
* "This code is unrestricted: you are free to use it however you like."
*
*/
(function ($) {
/**
* Class: $.jqplot.CanvasAxisLabelRenderer
* Renderer to draw axis labels with a canvas element to support advanced
* featrues such as rotated text. This renderer uses a separate rendering engine
* to draw the text on the canvas. Two modes of rendering the text are available.
* If the browser has native font support for canvas fonts (currently Mozila 3.5
* and Safari 4), you can enable text rendering with the canvas fillText method.
* You do so by setting the "enableFontSupport" option to true.
*
* Browsers lacking native font support will have the text drawn on the canvas
* using the Hershey font metrics. Even if the "enableFontSupport" option is true
* non-supporting browsers will still render with the Hershey font.
*
*/
$.jqplot.CanvasAxisLabelRenderer = function (options) {
// Group: Properties
// prop: angle
// angle of text, measured clockwise from x axis.
this.angle = 0;
// name of the axis associated with this tick
this.axis;
// prop: show
// whether or not to show the tick (mark and label).
this.show = true;
// prop: showLabel
// whether or not to show the label.
this.showLabel = true;
// prop: label
// label for the axis.
this.label = '';
// prop: fontFamily
// CSS spec for the font-family css attribute.
// Applies only to browsers supporting native font rendering in the
// canvas tag. Currently Mozilla 3.5 and Safari 4.
this.fontFamily = '"Trebuchet MS", Arial, Helvetica, sans-serif';
// prop: fontSize
// CSS spec for font size.
this.fontSize = '11pt';
// prop: fontWeight
// CSS spec for fontWeight: normal, bold, bolder, lighter or a number 100 - 900
this.fontWeight = 'normal';
// prop: fontStretch
// Multiplier to condense or expand font width.
// Applies only to browsers which don't support canvas native font rendering.
this.fontStretch = 1.0;
// prop: textColor
// css spec for the color attribute.
this.textColor = '#666666';
// prop: enableFontSupport
// true to turn on native canvas font support in Mozilla 3.5+ and Safari 4+.
// If true, label will be drawn with canvas tag native support for fonts.
// If false, label will be drawn with Hershey font metrics.
this.enableFontSupport = true;
// prop: pt2px
// Point to pixel scaling factor, used for computing height of bounding box
// around a label. The labels text renderer has a default setting of 1.4, which
// should be suitable for most fonts. Leave as null to use default. If tops of
// letters appear clipped, increase this. If bounding box seems too big, decrease.
// This is an issue only with the native font renderering capabilities of Mozilla
// 3.5 and Safari 4 since they do not provide a method to determine the font height.
this.pt2px = null;
this._elem;
this._ctx;
this._plotWidth;
this._plotHeight;
this._plotDimensions = {height: null, width: null};
$.extend(true, this, options);
if (options.angle == null && this.axis != 'xaxis' && this.axis != 'x2axis') {
this.angle = -90;
}
var ropts = {
fontSize: this.fontSize,
fontWeight: this.fontWeight,
fontStretch: this.fontStretch,
fillStyle: this.textColor,
angle: this.getAngleRad(),
fontFamily: this.fontFamily
};
if (this.pt2px) {
ropts.pt2px = this.pt2px;
}
if (this.enableFontSupport) {
if ($.jqplot.support_canvas_text()) {
this._textRenderer = new $.jqplot.CanvasFontRenderer(ropts);
}
else {
this._textRenderer = new $.jqplot.CanvasTextRenderer(ropts);
}
}
else {
this._textRenderer = new $.jqplot.CanvasTextRenderer(ropts);
}
};
$.jqplot.CanvasAxisLabelRenderer.prototype.init = function (options) {
$.extend(true, this, options);
this._textRenderer.init({
fontSize: this.fontSize,
fontWeight: this.fontWeight,
fontStretch: this.fontStretch,
fillStyle: this.textColor,
angle: this.getAngleRad(),
fontFamily: this.fontFamily
});
};
// return width along the x axis
// will check first to see if an element exists.
// if not, will return the computed text box width.
$.jqplot.CanvasAxisLabelRenderer.prototype.getWidth = function (ctx) {
if (this._elem) {
return this._elem.outerWidth(true);
}
else {
var tr = this._textRenderer;
var l = tr.getWidth(ctx);
var h = tr.getHeight(ctx);
var w = Math.abs(Math.sin(tr.angle) * h) + Math.abs(Math.cos(tr.angle) * l);
return w;
}
};
// return height along the y axis.
$.jqplot.CanvasAxisLabelRenderer.prototype.getHeight = function (ctx) {
if (this._elem) {
return this._elem.outerHeight(true);
}
else {
var tr = this._textRenderer;
var l = tr.getWidth(ctx);
var h = tr.getHeight(ctx);
var w = Math.abs(Math.cos(tr.angle) * h) + Math.abs(Math.sin(tr.angle) * l);
return w;
}
};
$.jqplot.CanvasAxisLabelRenderer.prototype.getAngleRad = function () {
var a = this.angle * Math.PI / 180;
return a;
};
$.jqplot.CanvasAxisLabelRenderer.prototype.draw = function (ctx, plot) {
// Memory Leaks patch
if (this._elem) {
if ($.jqplot.use_excanvas && window.G_vmlCanvasManager.uninitElement !== undefined) {
window.G_vmlCanvasManager.uninitElement(this._elem.get(0));
}
this._elem.emptyForce();
this._elem = null;
}
// create a canvas here, but can't draw on it untill it is appended
// to dom for IE compatability.
var elem = plot.canvasManager.getCanvas();
this._textRenderer.setText(this.label, ctx);
var w = this.getWidth(ctx);
var h = this.getHeight(ctx);
elem.width = w;
elem.height = h;
elem.style.width = w;
elem.style.height = h;
elem = plot.canvasManager.initCanvas(elem);
this._elem = $(elem);
this._elem.css({position: 'absolute'});
this._elem.addClass('jqplot-' + this.axis + '-label');
elem = null;
return this._elem;
};
$.jqplot.CanvasAxisLabelRenderer.prototype.pack = function () {
this._textRenderer.draw(this._elem.get(0).getContext("2d"), this.label);
};
})(jQuery);