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Bars.js
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Bars.js
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if(!dojo._hasResource["dojox.charting.plot2d.Bars"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
dojo._hasResource["dojox.charting.plot2d.Bars"] = true;
dojo.provide("dojox.charting.plot2d.Bars");
dojo.require("dojox.charting.plot2d.common");
dojo.require("dojox.charting.plot2d.Base");
dojo.require("dojox.lang.utils");
dojo.require("dojox.lang.functional");
(function(){
var df = dojox.lang.functional, du = dojox.lang.utils,
dc = dojox.charting.plot2d.common,
purgeGroup = df.lambda("item.purgeGroup()");
dojo.declare("dojox.charting.plot2d.Bars", dojox.charting.plot2d.Base, {
defaultParams: {
hAxis: "x", // use a horizontal axis named "x"
vAxis: "y", // use a vertical axis named "y"
gap: 0, // gap between columns in pixels
shadows: null // draw shadows
},
optionalParams: {}, // no optional parameters
constructor: function(chart, kwArgs){
this.opt = dojo.clone(this.defaultParams);
du.updateWithObject(this.opt, kwArgs);
this.series = [];
this.hAxis = this.opt.hAxis;
this.vAxis = this.opt.vAxis;
},
calculateAxes: function(dim){
var stats = dc.collectSimpleStats(this.series), t;
stats.hmin -= 0.5;
stats.hmax += 0.5;
t = stats.hmin, stats.hmin = stats.vmin, stats.vmin = t;
t = stats.hmax, stats.hmax = stats.vmax, stats.vmax = t;
this._calc(dim, stats);
return this;
},
render: function(dim, offsets){
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, color, stroke, fill, f,
gap = this.opt.gap < this._vScaler.scale / 3 ? this.opt.gap : 0;
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;
if(!run.fill || !run.stroke){
// need autogenerated color
color = run.dyn.color = new dojo.Color(t.next("color"));
}
stroke = run.stroke ? run.stroke : dc.augmentStroke(t.series.stroke, color);
fill = run.fill ? run.fill : dc.augmentFill(t.series.fill, color);
var baseline = Math.max(0, this._hScaler.bounds.lower),
xoff = offsets.l + this._hScaler.scale * (baseline - this._hScaler.bounds.lower),
yoff = dim.height - offsets.b - this._vScaler.scale * (1.5 - this._vScaler.bounds.lower) + gap;
for(var j = 0; j < run.data.length; ++j){
var v = run.data[j],
width = this._hScaler.scale * (v - baseline),
height = this._vScaler.scale - 2 * gap,
w = Math.abs(width);
if(w >= 1 && height >= 1){
var shape = s.createRect({
x: xoff + (width < 0 ? width : 0),
y: yoff - this._vScaler.scale * j,
width: w, height: height
}).setFill(fill).setStroke(stroke);
run.dyn.fill = shape.getFill();
run.dyn.stroke = shape.getStroke();
}
}
run.dirty = false;
}
this.dirty = false;
return this;
}
});
})();
}

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