- Author:
- David Nickerson <nickerso@users.sourceforge.net>
- Date:
- 2009-07-16 02:00:03+12:00
- Desc:
- the starting point for the HH tutorial example
- Permanent Source URI:
- https://models.fieldml.org/workspace/a1/rawfile/f6a8f90307388eb4b040ee3566b84d88b59247f7/dojo-presentation/js/dojo/dojox/charting/plot2d/Pie.js
dojo.provide("dojox.charting.plot2d.Pie");
dojo.require("dojox.charting.Element");
dojo.require("dojox.charting.axis2d.common");
dojo.require("dojox.charting.plot2d.common");
dojo.require("dojox.lang.functional");
dojo.require("dojox.gfx");
(function(){
var df = dojox.lang.functional, du = dojox.lang.utils,
dc = dojox.charting.plot2d.common,
da = dojox.charting.axis2d.common,
g = dojox.gfx;
dojo.declare("dojox.charting.plot2d.Pie", dojox.charting.Element, {
defaultParams: {
labels: true,
ticks: false,
fixed: true,
precision: 1,
labelOffset: 20,
labelStyle: "default", // default/rows/auto
htmlLabels: true // use HTML to draw labels
},
optionalParams: {
font: "",
fontColor: "",
radius: 0
},
constructor: function(chart, kwArgs){
this.opt = dojo.clone(this.defaultParams);
du.updateWithObject(this.opt, kwArgs);
du.updateWithPattern(this.opt, kwArgs, this.optionalParams);
this.run = null;
this.dyn = [];
},
clear: function(){
this.dirty = true;
this.dyn = [];
return this;
},
setAxis: function(axis){
// nothing
return this;
},
addSeries: function(run){
this.run = run;
return this;
},
calculateAxes: function(dim){
// nothing
return this;
},
getRequiredColors: function(){
return this.run ? this.run.data.length : 0;
},
// events
plotEvent: function(o){
// intentionally empty --- used for events
},
connect: function(object, method){
this.dirty = true;
return dojo.connect(this, "plotEvent", object, method);
},
events: function(){
var ls = this.plotEvent._listeners;
if(!ls || !ls.length){ return false; }
for(var i in ls){
if(!(i in Array.prototype)){
return true;
}
}
return false;
},
_connectEvents: function(shape, o){
shape.connect("onmouseover", this, function(e){
o.type = "onmouseover";
o.event = e;
this.plotEvent(o);
});
shape.connect("onmouseout", this, function(e){
o.type = "onmouseout";
o.event = e;
this.plotEvent(o);
});
shape.connect("onclick", this, function(e){
o.type = "onclick";
o.event = e;
this.plotEvent(o);
});
},
render: function(dim, offsets){
if(!this.dirty){ return this; }
this.dirty = false;
this.cleanGroup();
var s = this.group, color, t = this.chart.theme;
// calculate the geometry
var rx = (dim.width - offsets.l - offsets.r) / 2,
ry = (dim.height - offsets.t - offsets.b) / 2,
r = Math.min(rx, ry),
taFont = "font" in this.opt ? this.opt.font : t.axis.font,
size = taFont ? g.normalizedLength(g.splitFontString(taFont).size) : 0,
taFontColor = "fontColor" in this.opt ? this.opt.fontColor : t.axis.fontColor,
start = 0, step, sum, slices, labels, shift, labelR,
run = this.run.data,
events = this.events();
if(typeof run[0] == "number"){
sum = df.foldl1(run, "+");
slices = dojo.map(run, function(x){ return x / sum; });
if(this.opt.labels){
labels = dojo.map(slices, function(x){
return this._getLabel(x * 100) + "%";
}, this);
}
}else{
sum = df.foldl1(run, function(a, b){ return {y: a.y + b.y}; }).y;
slices = df.map(run, function(x){ return x.y / sum; });
if(this.opt.labels){
labels = dojo.map(slices, function(x, i){
var v = run[i];
return "text" in v ? v.text : this._getLabel(x * 100) + "%";
}, this);
}
}
if(this.opt.labels){
shift = df.foldl1(df.map(labels, function(label){
return dojox.gfx._base._getTextBox(label, {font: taFont}).w;
}, this), "Math.max(a, b)") / 2;
if(this.opt.labelOffset < 0){
r = Math.min(rx - 2 * shift, ry - size) + this.opt.labelOffset;
}
labelR = r - this.opt.labelOffset;
}
if("radius" in this.opt){
r = this.opt.radius;
labelR = r - this.opt.labelOffset;
}
var circle = {
cx: offsets.l + rx,
cy: offsets.t + ry,
r: r
};
this.dyn = [];
if(!this.run || !run.length){
return this;
}
if(run.length == 1){
// need autogenerated color
color = new dojo.Color(t.next("color"));
var shape = s.createCircle(circle).
setFill(dc.augmentFill(t.run.fill, color)).
setStroke(dc.augmentStroke(t.series.stroke, color));
this.dyn.push({color: color, fill: shape.getFill(), stroke: shape.getStroke()});
if(this.opt.labels){
// draw the label
var elem = da.createText[this.opt.htmlLabels && dojox.gfx.renderer != "vml" ? "html" : "gfx"]
(this.chart, s, circle.cx, circle.cy + size / 2, "middle",
"100%", taFont, taFontColor);
if(this.opt.htmlLabels){ this.htmlElements.push(elem); }
}
return this;
}
// draw slices
dojo.forEach(slices, function(x, i){
// calculate the geometry of the slice
var end = start + x * 2 * Math.PI, v = run[i];
if(i + 1 == slices.length){
end = 2 * Math.PI;
}
var step = end - start,
x1 = circle.cx + r * Math.cos(start),
y1 = circle.cy + r * Math.sin(start),
x2 = circle.cx + r * Math.cos(end),
y2 = circle.cy + r * Math.sin(end);
// draw the slice
var color, fill, stroke;
if(typeof v == "object"){
color = "color" in v ? v.color : new dojo.Color(t.next("color"));
fill = "fill" in v ? v.fill : dc.augmentFill(t.series.fill, color);
stroke = "stroke" in v ? v.stroke : dc.augmentStroke(t.series.stroke, color);
}else{
color = new dojo.Color(t.next("color"));
fill = dc.augmentFill(t.series.fill, color);
stroke = dc.augmentStroke(t.series.stroke, color);
}
var shape = s.createPath({}).
moveTo(circle.cx, circle.cy).
lineTo(x1, y1).
arcTo(r, r, 0, step > Math.PI, true, x2, y2).
lineTo(circle.cx, circle.cy).
closePath().
setFill(fill).
setStroke(stroke);
this.dyn.push({color: color, fill: fill, stroke: stroke});
if(events){
var o = {
element: "slice",
index: i,
run: this.run,
plot: this,
shape: shape,
x: i,
y: typeof v == "number" ? v : v.y,
cx: circle.cx,
cy: circle.cy,
cr: r
};
this._connectEvents(shape, o);
}
start = end;
}, this);
// draw labels
if(this.opt.labels){
start = 0;
dojo.forEach(slices, function(slice, i){
// calculate the geometry of the slice
var end = start + slice * 2 * Math.PI, v = run[i];
if(i + 1 == slices.length){
end = 2 * Math.PI;
}
var labelAngle = (start + end) / 2,
x = circle.cx + labelR * Math.cos(labelAngle),
y = circle.cy + labelR * Math.sin(labelAngle) + size / 2;
// draw the label
var elem = da.createText[this.opt.htmlLabels && dojox.gfx.renderer != "vml" ? "html" : "gfx"]
(this.chart, s, x, y, "middle",
labels[i], taFont,
(typeof v == "object" && "fontColor" in v)
? v.fontColor : taFontColor);
if(this.opt.htmlLabels){ this.htmlElements.push(elem); }
start = end;
}, this);
}
return this;
},
// utilities
_getLabel: function(number){
return this.opt.fixed ? number.toFixed(this.opt.precision) : number.toString();
}
});
})();
