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436 lines
18 KiB
JavaScript
436 lines
18 KiB
JavaScript
/**
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* jqPlot
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* Pure JavaScript plotting plugin using jQuery
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*
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* Version: 1.0.0b2_r947
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*
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* Copyright (c) 2009-2011 Chris Leonello
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* jqPlot is currently available for use in all personal or commercial projects
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* under both the MIT (http://www.opensource.org/licenses/mit-license.php) and GPL
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* version 2.0 (http://www.gnu.org/licenses/gpl-2.0.html) licenses. This means that you can
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* choose the license that best suits your project and use it accordingly.
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*
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* Although not required, the author would appreciate an email letting him
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* know of any substantial use of jqPlot. You can reach the author at:
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* chris at jqplot dot com or see http://www.jqplot.com/info.php .
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*
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* If you are feeling kind and generous, consider supporting the project by
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* making a donation at: http://www.jqplot.com/donate.php .
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*
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* sprintf functions contained in jqplot.sprintf.js by Ash Searle:
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*
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* version 2007.04.27
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* author Ash Searle
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* http://hexmen.com/blog/2007/03/printf-sprintf/
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* http://hexmen.com/js/sprintf.js
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* The author (Ash Searle) has placed this code in the public domain:
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* "This code is unrestricted: you are free to use it however you like."
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*
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*/
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(function($) {
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/**
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* Class: $.jqplot.MekkoRenderer
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* Draws a Mekko style chart which shows 3 dimensional data on a 2 dimensional graph.
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* the <$.jqplot.MekkoAxisRenderer> should be used with mekko charts. The mekko renderer
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* overrides the default legend renderer with it's own $.jqplot.MekkoLegendRenderer
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* which allows more flexibility to specify number of rows and columns in the legend.
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*
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* Data is specified per bar in the chart. You can specify data as an array of y values, or as
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* an array of [label, value] pairs. Note that labels are used only on the first series.
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* Labels on subsequent series are ignored:
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*
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* > bar1 = [['shirts', 8],['hats', 14],['shoes', 6],['gloves', 16],['dolls', 12]];
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* > bar2 = [15,6,9,13,6];
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* > bar3 = [['grumpy',4],['sneezy',2],['happy',7],['sleepy',9],['doc',7]];
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*
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* If you want to place labels for each bar under the axis, you use the barLabels option on
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* the axes. The bar labels can be styled with the ".jqplot-mekko-barLabel" css class.
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*
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* > barLabels = ['Mickey Mouse', 'Donald Duck', 'Goofy'];
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* > axes:{xaxis:{barLabels:barLabels}}
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*
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*/
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$.jqplot.MekkoRenderer = function(){
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this.shapeRenderer = new $.jqplot.ShapeRenderer();
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// prop: borderColor
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// color of the borders between areas on the chart
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this.borderColor = null;
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// prop: showBorders
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// True to draw borders lines between areas on the chart.
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// False will draw borders lines with the same color as the area.
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this.showBorders = true;
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};
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// called with scope of series.
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$.jqplot.MekkoRenderer.prototype.init = function(options, plot) {
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this.fill = false;
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this.fillRect = true;
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this.strokeRect = true;
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this.shadow = false;
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// width of bar on x axis.
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this._xwidth = 0;
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this._xstart = 0;
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$.extend(true, this.renderer, options);
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// set the shape renderer options
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var opts = {lineJoin:'miter', lineCap:'butt', isarc:false, fillRect:this.fillRect, strokeRect:this.strokeRect};
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this.renderer.shapeRenderer.init(opts);
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plot.axes.x2axis._series.push(this);
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this._type = 'mekko';
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};
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// Method: setGridData
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// converts the user data values to grid coordinates and stores them
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// in the gridData array. Will convert user data into appropriate
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// rectangles.
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// Called with scope of a series.
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$.jqplot.MekkoRenderer.prototype.setGridData = function(plot) {
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// recalculate the grid data
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var xp = this._xaxis.series_u2p;
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var yp = this._yaxis.series_u2p;
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var data = this._plotData;
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this.gridData = [];
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// figure out width on x axis.
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// this._xwidth = this._sumy / plot._sumy * this.canvas.getWidth();
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this._xwidth = xp(this._sumy) - xp(0);
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if (this.index>0) {
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this._xstart = plot.series[this.index-1]._xstart + plot.series[this.index-1]._xwidth;
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}
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var totheight = this.canvas.getHeight();
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var sumy = 0;
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var cury;
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var curheight;
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for (var i=0; i<data.length; i++) {
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if (data[i] != null) {
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sumy += data[i][1];
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cury = totheight - (sumy / this._sumy * totheight);
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curheight = data[i][1] / this._sumy * totheight;
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this.gridData.push([this._xstart, cury, this._xwidth, curheight]);
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}
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}
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};
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// Method: makeGridData
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// converts any arbitrary data values to grid coordinates and
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// returns them. This method exists so that plugins can use a series'
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// linerenderer to generate grid data points without overwriting the
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// grid data associated with that series.
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// Called with scope of a series.
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$.jqplot.MekkoRenderer.prototype.makeGridData = function(data, plot) {
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// recalculate the grid data
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// figure out width on x axis.
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var xp = this._xaxis.series_u2p;
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var totheight = this.canvas.getHeight();
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var sumy = 0;
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var cury;
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var curheight;
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var gd = [];
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for (var i=0; i<data.length; i++) {
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if (data[i] != null) {
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sumy += data[i][1];
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cury = totheight - (sumy / this._sumy * totheight);
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curheight = data[i][1] / this._sumy * totheight;
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gd.push([this._xstart, cury, this._xwidth, curheight]);
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}
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}
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return gd;
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};
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// called within scope of series.
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$.jqplot.MekkoRenderer.prototype.draw = function(ctx, gd, options) {
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var i;
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var opts = (options != undefined) ? options : {};
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var showLine = (opts.showLine != undefined) ? opts.showLine : this.showLine;
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var colorGenerator = new $.jqplot.ColorGenerator(this.seriesColors);
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ctx.save();
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if (gd.length) {
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if (showLine) {
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for (i=0; i<gd.length; i++){
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opts.fillStyle = colorGenerator.next();
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if (this.renderer.showBorders) {
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opts.strokeStyle = this.renderer.borderColor;
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}
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else {
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opts.strokeStyle = opts.fillStyle;
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}
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this.renderer.shapeRenderer.draw(ctx, gd[i], opts);
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}
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}
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}
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ctx.restore();
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};
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$.jqplot.MekkoRenderer.prototype.drawShadow = function(ctx, gd, options) {
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// This is a no-op, no shadows on mekko charts.
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};
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/**
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* Class: $.jqplot.MekkoLegendRenderer
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* Legend renderer used by mekko charts with options for
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* controlling number or rows and columns as well as placement
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* outside of plot area.
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*
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*/
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$.jqplot.MekkoLegendRenderer = function(){
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//
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};
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$.jqplot.MekkoLegendRenderer.prototype.init = function(options) {
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// prop: numberRows
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// Maximum number of rows in the legend. 0 or null for unlimited.
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this.numberRows = null;
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// prop: numberColumns
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// Maximum number of columns in the legend. 0 or null for unlimited.
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this.numberColumns = null;
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// this will override the placement option on the Legend object
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this.placement = "outside";
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$.extend(true, this, options);
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};
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// called with scope of legend
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$.jqplot.MekkoLegendRenderer.prototype.draw = function() {
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var legend = this;
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if (this.show) {
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var series = this._series;
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var ss = 'position:absolute;';
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ss += (this.background) ? 'background:'+this.background+';' : '';
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ss += (this.border) ? 'border:'+this.border+';' : '';
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ss += (this.fontSize) ? 'font-size:'+this.fontSize+';' : '';
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ss += (this.fontFamily) ? 'font-family:'+this.fontFamily+';' : '';
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ss += (this.textColor) ? 'color:'+this.textColor+';' : '';
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this._elem = $('<table class="jqplot-table-legend" style="'+ss+'"></table>');
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// Mekko charts legends don't go by number of series, but by number of data points
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// in the series. Refactor things here for that.
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var pad = false,
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reverse = true, // mekko charts are always stacked, so reverse
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nr, nc;
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var s = series[0];
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var colorGenerator = new $.jqplot.ColorGenerator(s.seriesColors);
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if (s.show) {
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var pd = s.data;
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if (this.numberRows) {
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nr = this.numberRows;
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if (!this.numberColumns){
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nc = Math.ceil(pd.length/nr);
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}
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else{
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nc = this.numberColumns;
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}
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}
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else if (this.numberColumns) {
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nc = this.numberColumns;
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nr = Math.ceil(pd.length/this.numberColumns);
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}
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else {
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nr = pd.length;
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nc = 1;
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}
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var i, j, tr, td1, td2, lt, rs, color;
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var idx = 0;
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for (i=0; i<nr; i++) {
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if (reverse){
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tr = $('<tr class="jqplot-table-legend"></tr>').prependTo(this._elem);
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}
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else{
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tr = $('<tr class="jqplot-table-legend"></tr>').appendTo(this._elem);
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}
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for (j=0; j<nc; j++) {
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if (idx < pd.length) {
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lt = this.labels[idx] || pd[idx][0].toString();
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color = colorGenerator.next();
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if (!reverse){
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if (i>0){
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pad = true;
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}
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else{
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pad = false;
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}
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}
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else{
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if (i == nr -1){
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pad = false;
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}
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else{
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pad = true;
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}
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}
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rs = (pad) ? this.rowSpacing : '0';
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td1 = $('<td class="jqplot-table-legend" style="text-align:center;padding-top:'+rs+';">'+
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'<div><div class="jqplot-table-legend-swatch" style="border-color:'+color+';"></div>'+
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'</div></td>');
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td2 = $('<td class="jqplot-table-legend" style="padding-top:'+rs+';"></td>');
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if (this.escapeHtml){
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td2.text(lt);
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}
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else {
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td2.html(lt);
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}
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if (reverse) {
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td2.prependTo(tr);
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td1.prependTo(tr);
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}
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else {
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td1.appendTo(tr);
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td2.appendTo(tr);
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}
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pad = true;
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}
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idx++;
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}
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}
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tr = null;
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td1 = null;
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td2 = null;
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}
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}
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return this._elem;
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};
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$.jqplot.MekkoLegendRenderer.prototype.pack = function(offsets) {
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if (this.show) {
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// fake a grid for positioning
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var grid = {_top:offsets.top, _left:offsets.left, _right:offsets.right, _bottom:this._plotDimensions.height - offsets.bottom};
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if (this.placement == 'insideGrid') {
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switch (this.location) {
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case 'nw':
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var a = grid._left + this.xoffset;
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var b = grid._top + this.yoffset;
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this._elem.css('left', a);
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this._elem.css('top', b);
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break;
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case 'n':
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var a = (offsets.left + (this._plotDimensions.width - offsets.right))/2 - this.getWidth()/2;
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var b = grid._top + this.yoffset;
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this._elem.css('left', a);
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this._elem.css('top', b);
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break;
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case 'ne':
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var a = offsets.right + this.xoffset;
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var b = grid._top + this.yoffset;
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this._elem.css({right:a, top:b});
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break;
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case 'e':
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var a = offsets.right + this.xoffset;
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var b = (offsets.top + (this._plotDimensions.height - offsets.bottom))/2 - this.getHeight()/2;
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this._elem.css({right:a, top:b});
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break;
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case 'se':
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var a = offsets.right + this.xoffset;
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var b = offsets.bottom + this.yoffset;
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this._elem.css({right:a, bottom:b});
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break;
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case 's':
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var a = (offsets.left + (this._plotDimensions.width - offsets.right))/2 - this.getWidth()/2;
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var b = offsets.bottom + this.yoffset;
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this._elem.css({left:a, bottom:b});
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break;
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case 'sw':
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var a = grid._left + this.xoffset;
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var b = offsets.bottom + this.yoffset;
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this._elem.css({left:a, bottom:b});
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break;
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case 'w':
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var a = grid._left + this.xoffset;
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var b = (offsets.top + (this._plotDimensions.height - offsets.bottom))/2 - this.getHeight()/2;
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this._elem.css({left:a, top:b});
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break;
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default: // same as 'se'
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var a = grid._right - this.xoffset;
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var b = grid._bottom + this.yoffset;
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this._elem.css({right:a, bottom:b});
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break;
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}
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}
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else {
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switch (this.location) {
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case 'nw':
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var a = this._plotDimensions.width - grid._left + this.xoffset;
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var b = grid._top + this.yoffset;
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this._elem.css('right', a);
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this._elem.css('top', b);
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break;
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case 'n':
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var a = (offsets.left + (this._plotDimensions.width - offsets.right))/2 - this.getWidth()/2;
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var b = this._plotDimensions.height - grid._top + this.yoffset;
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this._elem.css('left', a);
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this._elem.css('bottom', b);
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break;
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case 'ne':
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var a = this._plotDimensions.width - offsets.right + this.xoffset;
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var b = grid._top + this.yoffset;
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this._elem.css({left:a, top:b});
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break;
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case 'e':
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var a = this._plotDimensions.width - offsets.right + this.xoffset;
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var b = (offsets.top + (this._plotDimensions.height - offsets.bottom))/2 - this.getHeight()/2;
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this._elem.css({left:a, top:b});
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break;
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case 'se':
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var a = this._plotDimensions.width - offsets.right + this.xoffset;
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var b = offsets.bottom + this.yoffset;
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this._elem.css({left:a, bottom:b});
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break;
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case 's':
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var a = (offsets.left + (this._plotDimensions.width - offsets.right))/2 - this.getWidth()/2;
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var b = this._plotDimensions.height - offsets.bottom + this.yoffset;
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this._elem.css({left:a, top:b});
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break;
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case 'sw':
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var a = this._plotDimensions.width - grid._left + this.xoffset;
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var b = offsets.bottom + this.yoffset;
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this._elem.css({right:a, bottom:b});
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break;
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case 'w':
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var a = this._plotDimensions.width - grid._left + this.xoffset;
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var b = (offsets.top + (this._plotDimensions.height - offsets.bottom))/2 - this.getHeight()/2;
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this._elem.css({right:a, top:b});
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break;
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default: // same as 'se'
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var a = grid._right - this.xoffset;
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var b = grid._bottom + this.yoffset;
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this._elem.css({right:a, bottom:b});
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break;
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}
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}
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}
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};
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// setup default renderers for axes and legend so user doesn't have to
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// called with scope of plot
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function preInit(target, data, options) {
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options = options || {};
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options.axesDefaults = options.axesDefaults || {};
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options.legend = options.legend || {};
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options.seriesDefaults = options.seriesDefaults || {};
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var setopts = false;
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if (options.seriesDefaults.renderer == $.jqplot.MekkoRenderer) {
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setopts = true;
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}
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else if (options.series) {
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for (var i=0; i < options.series.length; i++) {
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if (options.series[i].renderer == $.jqplot.MekkoRenderer) {
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setopts = true;
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}
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}
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}
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if (setopts) {
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options.axesDefaults.renderer = $.jqplot.MekkoAxisRenderer;
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options.legend.renderer = $.jqplot.MekkoLegendRenderer;
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options.legend.preDraw = true;
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}
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}
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$.jqplot.preInitHooks.push(preInit);
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})(jQuery);
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