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Stacked.js
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Stacked.js
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if(!dojo._hasResource["dojox.charting.plot2d.Stacked"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
dojo._hasResource["dojox.charting.plot2d.Stacked"] = true;
dojo.provide("dojox.charting.plot2d.Stacked");
dojo.require("dojox.charting.plot2d.common");
dojo.require("dojox.charting.plot2d.Default");
dojo.require("dojox.lang.functional");
(function(){
var df = dojox.lang.functional, dc = dojox.charting.plot2d.common,
purgeGroup = df.lambda("item.purgeGroup()");
dojo.declare("dojox.charting.plot2d.Stacked", dojox.charting.plot2d.Default, {
calculateAxes: function(dim){
var stats = dc.collectStackedStats(this.series);
this._maxRunLength = stats.hmax;
this._calc(dim, stats);
return this;
},
render: function(dim, offsets){
// stack all values
var acc = df.repeat(this._maxRunLength, "-> 0", 0);
for(var i = 0; i < this.series.length; ++i){
var run = this.series[i];
for(var j = 0; j < run.data.length; ++j){
var v = run.data[j];
if(isNaN(v)){ v = 0; }
acc[j] += v;
}
}
// draw runs in backwards
if(this.dirty){
dojo.forEach(this.series, purgeGroup);
this.cleanGroup();
var s = this.group;
df.forEachReversed(this.series, function(item){ item.cleanGroup(s); });
}
var t = this.chart.theme, stroke, outline, color, marker;
for(var i = this.series.length - 1; i >= 0; --i){
var run = this.series[i];
if(!this.dirty && !run.dirty){ continue; }
run.cleanGroup();
var s = run.group,
lpoly = dojo.map(acc, function(v, i){
return {
x: this._hScaler.scale * (i + 1 - this._hScaler.bounds.lower) + offsets.l,
y: dim.height - offsets.b - this._vScaler.scale * (v - this._vScaler.bounds.lower)
};
}, this);
if(!run.fill || !run.stroke){
// need autogenerated color
color = new dojo.Color(t.next("color"));
}
if(this.opt.areas){
var apoly = dojo.clone(lpoly);
apoly.push({x: lpoly[lpoly.length - 1].x, y: dim.height - offsets.b});
apoly.push({x: lpoly[0].x, y: dim.height - offsets.b});
apoly.push(lpoly[0]);
var fill = run.fill ? run.fill : dc.augmentFill(t.series.fill, color);
s.createPolyline(apoly).setFill(fill);
}
if(this.opt.lines || this.opt.markers){
// need a stroke
stroke = run.stroke ? dc.makeStroke(run.stroke) : dc.augmentStroke(t.series.stroke, color);
if(run.outline || t.series.outline){
outline = dc.makeStroke(run.outline ? run.outline : t.series.outline);
outline.width = 2 * outline.width + stroke.width;
}
}
if(this.opt.markers){
// need a marker
marker = run.marker ? run.marker : t.next("marker");
}
if(this.opt.shadows && stroke){
var sh = this.opt.shadows, shadowColor = new dojo.Color([0, 0, 0, 0.3]),
spoly = dojo.map(lpoly, function(c){
return {x: c.x + sh.dx, y: c.y + sh.dy};
}),
shadowStroke = dojo.clone(outline ? outline : stroke);
shadowStroke.color = shadowColor;
shadowStroke.width += sh.dw ? sh.dw : 0;
if(this.opt.lines){
s.createPolyline(spoly).setStroke(shadowStroke);
}
if(this.opt.markers){
dojo.forEach(spoly, function(c){
s.createPath("M" + c.x + " " + c.y + " " + marker).setStroke(shadowStroke).setFill(shadowColor);
}, this);
}
}
if(this.opt.lines){
if(outline){
s.createPolyline(lpoly).setStroke(outline);
}
s.createPolyline(lpoly).setStroke(stroke);
}
if(this.opt.markers){
dojo.forEach(lpoly, function(c){
var path = "M" + c.x + " " + c.y + " " + marker;
if(outline){
s.createPath(path).setStroke(outline);
}
s.createPath(path).setStroke(stroke).setFill(stroke.color);
}, this);
}
run.dirty = false;
// update the accumulator
for(var j = 0; j < run.data.length; ++j){
var v = run.data[j];
if(isNaN(v)){ v = 0; }
acc[j] -= v;
}
}
this.dirty = false;
return this;
}
});
})();
}

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Stacked.js (3 KB)

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