- 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/Default.js
dojo.provide("dojox.charting.plot2d.Default");
dojo.require("dojox.charting.plot2d.common");
dojo.require("dojox.charting.plot2d.Base");
dojo.require("dojox.lang.utils");
dojo.require("dojox.lang.functional");
dojo.require("dojox.lang.functional.reversed");
(function(){
var df = dojox.lang.functional, du = dojox.lang.utils,
dc = dojox.charting.plot2d.common,
purgeGroup = df.lambda("item.purgeGroup()");
// function for translating polylines to curves with tension
var curve = function(arr, tension){
return dojo.map(arr, function(item, i){
if(i == 0){ return "M" + item.x + "," + item.y; }
var dx = item.x - arr[i - 1].x, dy = arr[i - 1].y;
return "C" + (item.x - (tension - 1) * (dx / tension)) + "," +
dy + " " + (item.x - (dx / tension)) + "," + item.y + " " + item.x + "," + item.y;
}).join(" ");
};
dojo.declare("dojox.charting.plot2d.Default", dojox.charting.plot2d.Base, {
defaultParams: {
hAxis: "x", // use a horizontal axis named "x"
vAxis: "y", // use a vertical axis named "y"
lines: true, // draw lines
areas: false, // draw areas
markers: false, // draw markers
shadows: 0, // draw shadows
tension: 0 // draw curved lines (tension>0)
},
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){
this._calc(dim, dc.collectSimpleStats(this.series));
return this;
},
render: function(dim, offsets){
this.dirty = this.isDirty();
if(this.dirty){
dojo.forEach(this.series, purgeGroup);
this.cleanGroup();
var s = this.group;
df.forEachRev(this.series, function(item){ item.cleanGroup(s); });
}
var t = this.chart.theme, stroke, outline, color, marker, events = this.events();
for(var i = this.series.length - 1; i >= 0; --i){
var run = this.series[i];
if(!this.dirty && !run.dirty){ continue; }
run.cleanGroup();
if(!run.data.length){
run.dirty = false;
continue;
}
var s = run.group, lpoly,
ht = this._hScaler.scaler.getTransformerFromModel(this._hScaler),
vt = this._vScaler.scaler.getTransformerFromModel(this._vScaler);
if(typeof run.data[0] == "number"){
lpoly = dojo.map(run.data, function(v, i){
return {
x: ht(i + 1) + offsets.l,
y: dim.height - offsets.b - vt(v)
};
}, this);
}else{
lpoly = dojo.map(run.data, function(v, i){
return {
x: ht(v.x) + offsets.l,
y: dim.height - offsets.b - vt(v.y)
};
}, this);
}
if(!run.fill || !run.stroke){
// need autogenerated color
color = run.dyn.color = new dojo.Color(t.next("color"));
}
var lpath = this.opt.tension ? curve(lpoly, this.opt.tension) : "";
if(this.opt.areas){
var fill = run.fill ? run.fill : dc.augmentFill(t.series.fill, color);
var apoly = dojo.clone(lpoly);
if(this.opt.tension){
var apath = "L" + apoly[apoly.length-1].x + "," + (dim.height - offsets.b) +
" L" + apoly[0].x + "," + (dim.height - offsets.b) +
" L" + apoly[0].x + "," + apoly[0].y;
run.dyn.fill = s.createPath(lpath + " " + apath).setFill(fill).getFill();
} else {
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]);
run.dyn.fill = s.createPolyline(apoly).setFill(fill).getFill();
}
}
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.dyn.marker = run.marker ? run.marker : t.next("marker");
}
var frontMarkers = null, outlineMarkers = null, shadowMarkers = null;
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){
if(this.opt.tension){
run.dyn.shadow = s.createPath(curve(spoly, this.opt.tension)).setStroke(shadowStroke).getStroke();
} else {
run.dyn.shadow = s.createPolyline(spoly).setStroke(shadowStroke).getStroke();
}
}
if(this.opt.markers){
shadowMarkers = dojo.map(spoly, function(c){
return s.createPath("M" + c.x + " " + c.y + " " + marker).
setStroke(shadowStroke).setFill(shadowColor);
}, this);
}
}
if(this.opt.lines){
if(outline){
if(this.opt.tension){
run.dyn.outline = s.createPath(lpath).setStroke(outline).getStroke();
} else {
run.dyn.outline = s.createPolyline(lpoly).setStroke(outline).getStroke();
}
}
if(this.opt.tension){
run.dyn.stroke = s.createPath(lpath).setStroke(stroke).getStroke();
} else {
run.dyn.stroke = s.createPolyline(lpoly).setStroke(stroke).getStroke();
}
}
if(this.opt.markers){
frontMarkers = new Array(lpoly.length);
outlineMarkers = new Array(lpoly.length);
dojo.forEach(lpoly, function(c, i){
var path = "M" + c.x + " " + c.y + " " + marker;
if(outline){
outlineMarkers[i] = s.createPath(path).setStroke(outline);
}
frontMarkers[i] = s.createPath(path).setStroke(stroke).setFill(stroke.color);
}, this);
if(events){
dojo.forEach(frontMarkers, function(s, i){
var o = {
element: "marker",
index: i,
run: run,
plot: this,
hAxis: this.hAxis || null,
vAxis: this.vAxis || null,
shape: s,
outline: outlineMarkers[i] || null,
shadow: shadowMarkers && shadowMarkers[i] || null,
cx: lpoly[i].x,
cy: lpoly[i].y
};
if(typeof run.data[0] == "number"){
o.x = i + 1;
o.y = run.data[i];
}else{
o.x = run.data[i].x;
o.y = run.data[i].y;
}
this._connectEvents(s, o);
}, this);
}
}
run.dirty = false;
}
this.dirty = false;
return this;
}
});
})();
