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110 lines
3.4 KiB
JavaScript
110 lines
3.4 KiB
JavaScript
15 years ago
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dojo.provide("dojox.charting.plot2d.Bars");
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dojo.require("dojox.charting.plot2d.common");
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dojo.require("dojox.charting.plot2d.Base");
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dojo.require("dojox.lang.utils");
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dojo.require("dojox.lang.functional");
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dojo.require("dojox.lang.functional.reversed");
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(function(){
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var df = dojox.lang.functional, du = dojox.lang.utils,
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dc = dojox.charting.plot2d.common,
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purgeGroup = df.lambda("item.purgeGroup()");
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dojo.declare("dojox.charting.plot2d.Bars", dojox.charting.plot2d.Base, {
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defaultParams: {
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hAxis: "x", // use a horizontal axis named "x"
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vAxis: "y", // use a vertical axis named "y"
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gap: 0, // gap between columns in pixels
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shadows: null // draw shadows
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},
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optionalParams: {
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minBarSize: 1, // minimal bar size in pixels
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maxBarSize: 1 // maximal bar size in pixels
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},
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constructor: function(chart, kwArgs){
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this.opt = dojo.clone(this.defaultParams);
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du.updateWithObject(this.opt, kwArgs);
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du.updateWithPattern(this.opt, kwArgs, this.optionalParams);
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this.series = [];
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this.hAxis = this.opt.hAxis;
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this.vAxis = this.opt.vAxis;
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},
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calculateAxes: function(dim){
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var stats = dc.collectSimpleStats(this.series), t;
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stats.hmin -= 0.5;
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stats.hmax += 0.5;
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t = stats.hmin, stats.hmin = stats.vmin, stats.vmin = t;
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t = stats.hmax, stats.hmax = stats.vmax, stats.vmax = t;
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this._calc(dim, stats);
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return this;
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},
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render: function(dim, offsets){
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this.dirty = this.isDirty();
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if(this.dirty){
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dojo.forEach(this.series, purgeGroup);
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this.cleanGroup();
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var s = this.group;
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df.forEachRev(this.series, function(item){ item.cleanGroup(s); });
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}
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var t = this.chart.theme, color, stroke, fill, f, gap, height,
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ht = this._hScaler.scaler.getTransformerFromModel(this._hScaler),
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vt = this._vScaler.scaler.getTransformerFromModel(this._vScaler),
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baseline = Math.max(0, this._hScaler.bounds.lower),
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baselineWidth = ht(baseline),
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events = this.events();
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f = dc.calculateBarSize(this._vScaler.bounds.scale, this.opt);
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gap = f.gap;
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height = f.size;
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this.resetEvents();
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for(var i = this.series.length - 1; i >= 0; --i){
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var run = this.series[i];
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if(!this.dirty && !run.dirty){ continue; }
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run.cleanGroup();
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var s = run.group;
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if(!run.fill || !run.stroke){
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// need autogenerated color
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color = run.dyn.color = new dojo.Color(t.next("color"));
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}
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stroke = run.stroke ? run.stroke : dc.augmentStroke(t.series.stroke, color);
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fill = run.fill ? run.fill : dc.augmentFill(t.series.fill, color);
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for(var j = 0; j < run.data.length; ++j){
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var v = run.data[j],
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hv = ht(v),
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width = hv - baselineWidth,
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w = Math.abs(width);
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if(w >= 1 && height >= 1){
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var shape = s.createRect({
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x: offsets.l + (v < baseline ? hv : baselineWidth),
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y: dim.height - offsets.b - vt(j + 1.5) + gap,
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width: w, height: height
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}).setFill(fill).setStroke(stroke);
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run.dyn.fill = shape.getFill();
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run.dyn.stroke = shape.getStroke();
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if(events){
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var o = {
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element: "bar",
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index: j,
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run: run,
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plot: this,
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hAxis: this.hAxis || null,
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vAxis: this.vAxis || null,
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shape: shape,
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x: v,
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y: j + 1.5
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};
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this._connectEvents(shape, o);
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}
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}
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}
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run.dirty = false;
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}
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this.dirty = false;
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return this;
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}
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});
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})();
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