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Diffstat (limited to 'tipboard/static/js/lib/jqplot/plugins/jqplot.canvasAxisLabelRenderer.js')
| -rw-r--r-- | tipboard/static/js/lib/jqplot/plugins/jqplot.canvasAxisLabelRenderer.js | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/tipboard/static/js/lib/jqplot/plugins/jqplot.canvasAxisLabelRenderer.js b/tipboard/static/js/lib/jqplot/plugins/jqplot.canvasAxisLabelRenderer.js new file mode 100644 index 0000000..6313dc1 --- /dev/null +++ b/tipboard/static/js/lib/jqplot/plugins/jqplot.canvasAxisLabelRenderer.js @@ -0,0 +1,203 @@ +/** + * jqPlot + * Pure JavaScript plotting plugin using jQuery + * + * Version: 1.0.8 + * Revision: 1250 + * + * Copyright (c) 2009-2013 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);
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