📄 plotters.js
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/* Copyright (c) 2004-2006, The Dojo Foundation All Rights Reserved. Licensed under the Academic Free License version 2.1 or above OR the modified BSD license. For more information on Dojo licensing, see: http://dojotoolkit.org/community/licensing.shtml*/dojo.provide("dojo.charting.vml.Plotters");
dojo.require("dojo.lang.common");
if(dojo.render.vml.capable){
dojo.mixin(dojo.charting.Plotters, {
/*********************************************************
* Grouped plotters: need all series on a plot at once.
*********************************************************/
_group: function(plotarea){
var group = document.createElement("div");
group.style.position="absolute";
group.style.top="0px";
group.style.left="0px";
group.style.width=plotarea.size.width+"px";
group.style.height=plotarea.size.height+"px";
return group;
},
Bar: function(
/* dojo.charting.PlotArea */plotarea,
/* dojo.charting.Plot */plot,
/* object? */kwArgs,
/* function? */applyTo
){
// summary
// Plots a set of grouped bars.
// Bindings: y
var area = plotarea.getArea();
var group = dojo.charting.Plotters._group(plotarea);
// precompile the data
var n = plot.series.length; // how many series
var data = [];
for(var i=0; i<n; i++){
var tmp = plot.series[i].data.evaluate(kwArgs);
data.push(tmp);
}
// calculate the width of each bar.
var space = 8;
var nPoints = data[0].length;
var width = ((area.right-area.left)-(space*(nPoints-1)))/nPoints; // the width of each group.
var barWidth = Math.round(width/n); // the width of each bar, no spaces.
var yOrigin = plot.axisY.getCoord(plot.axisX.origin, plotarea, plot);
for(var i=0; i<nPoints; i++){
// calculate offset
var xStart = area.left+(width*i)+(space*i);
for(var j=0; j<n; j++){
var value = data[j][i].y;
var yA = yOrigin;
var x = xStart + (barWidth*j);
var y = plot.axisY.getCoord(value, plotarea, plot);
var h = Math.abs(yA-y);
if(value < plot.axisX.origin){
yA = y;
y = yOrigin;
}
var bar=document.createElement("v:rect");
bar.style.position="absolute";
bar.style.top=y+1+"px";
bar.style.left=x+"px";
bar.style.width=barWidth+"px";
bar.style.height=h+"px";
bar.setAttribute("fillColor", data[j][i].series.color);
bar.setAttribute("stroked", "false");
bar.style.antialias="false";
var fill=document.createElement("v:fill");
fill.setAttribute("opacity", "0.6");
bar.appendChild(fill);
if(applyTo){ applyTo(bar, data[j][i].src); }
group.appendChild(bar);
}
}
return group; // HTMLDivElement
},
HorizontalBar: function(
/* dojo.charting.PlotArea */plotarea,
/* dojo.charting.Plot */plot,
/* object? */kwArgs,
/* function? */applyTo
){
// summary
// Plots data in a set of grouped bars horizontally.
// Bindings: y
var area = plotarea.getArea();
var group = dojo.charting.Plotters._group(plotarea);
// precompile the data
var n = plot.series.length; // how many series
var data = [];
for(var i=0; i<n; i++){
var tmp = plot.series[i].data.evaluate(kwArgs);
data.push(tmp);
}
var space = 6;
var nPoints = data[0].length;
var h = ((area.bottom-area.top)-(space*(nPoints-1)))/nPoints;
var barH = h/n;
var xOrigin = plot.axisX.getCoord(0, plotarea, plot);
for(var i=0; i<nPoints; i++){
// calculate offset
var yStart = area.top+(h*i)+(space*i);
for(var j=0; j<n; j++){
var value = data[j][i].y;
var y = yStart + (barH*j);
var xA = xOrigin;
var x = plot.axisX.getCoord(value, plotarea, plot);
var w = Math.abs(x-xA);
if(value > 0){
x = xOrigin;
}
var bar=document.createElement("v:rect");
bar.style.position="absolute";
bar.style.top=y+1+"px";
bar.style.left=xA+"px";
bar.style.width=w+"px";
bar.style.height=barH+"px";
bar.setAttribute("fillColor", data[j][i].series.color);
bar.setAttribute("stroked", "false");
bar.style.antialias="false";
var fill=document.createElement("v:fill");
fill.setAttribute("opacity", "0.6");
bar.appendChild(fill);
if(applyTo){ applyTo(bar, data[j][i].src); }
group.appendChild(bar);
}
}
// calculate the width of each bar.
var space = 4;
var n = plot.series.length;
var h = ((area.bottom-area.top)-(space*(n-1)))/n;
var xOrigin = plot.axisX.getCoord(0, plotarea, plot);
for(var i=0; i<n; i++){
var series = plot.series[i];
var data = series.data.evaluate(kwArgs);
var y = area.top+(h*i)+(space*i);
var value = data[data.length-1].y;
var xA = xOrigin;
var x = plot.axisX.getCoord(value, plotarea, plot);
var w = Math.abs(xA-x);
if(value > 0){
xA = x;
x = xOrigin;
}
}
return group; // HTMLDivElement
},
Gantt: function(
/* dojo.charting.PlotArea */plotarea,
/* dojo.charting.Plot */plot,
/* object? */kwArgs,
/* function? */applyTo
){
// summary
// Plots a grouped set of Gantt bars
// Bindings: high/low
var area = plotarea.getArea();
var group = dojo.charting.Plotters._group(plotarea);
// precompile the data
var n = plot.series.length; // how many series
var data = [];
for(var i=0; i<n; i++){
var tmp = plot.series[i].data.evaluate(kwArgs);
data.push(tmp);
}
var space = 2;
var nPoints = data[0].length;
var h = ((area.bottom-area.top)-(space*(nPoints-1)))/nPoints;
var barH = h/n;
for(var i=0; i<nPoints; i++){
// calculate offset
var yStart = area.top+(h*i)+(space*i);
for(var j=0; j<n; j++){
var high = data[j][i].high;
var low = data[j][i].low;
if(low > high){
var t = high;
high = low;
low = t;
}
var x = plot.axisX.getCoord(low, plotarea, plot);
var w = plot.axisX.getCoord(high, plotarea, plot) - x;
var y = yStart + (barH*j);
var bar=document.createElement("v:rect");
bar.style.position="absolute";
bar.style.top=y+1+"px";
bar.style.left=x+"px";
bar.style.width=w+"px";
bar.style.height=barH+"px";
bar.setAttribute("fillColor", data[j][i].series.color);
bar.setAttribute("stroked", "false");
bar.style.antialias="false";
var fill=document.createElement("v:fill");
fill.setAttribute("opacity", "0.6");
bar.appendChild(fill);
if(applyTo){ applyTo(bar, data[j][i].src); }
group.appendChild(bar);
}
}
return group; // HTMLDivElement
},
StackedArea: function(
/* dojo.charting.PlotArea */plotarea,
/* dojo.charting.Plot */plot,
/* object? */kwArgs,
/* function? */applyTo
){
// summary
// Plots a set of stacked areas.
// Bindings: x/y
var area = plotarea.getArea();
var group = dojo.charting.Plotters._group(plotarea);
// precompile the data
var n = plot.series.length; // how many series
var data = [];
var totals = [];
// we're assuming that all series for this plot has the name x assignment for now.
for(var i=0; i<n; i++){
var tmp = plot.series[i].data.evaluate(kwArgs);
// run through and add current totals
for(var j=0; j<tmp.length; j++){
if(i==0){ totals.push(tmp[j].y); }
else { totals[j] += tmp[j].y; }
tmp[j].y = totals[j];
}
data.push(tmp);
}
for(var i=n-1; i>=0; i--){
var path=document.createElement("v:shape");
path.setAttribute("strokeweight", "1px");
path.setAttribute("strokecolor", data[i][0].series.color);
path.setAttribute("fillcolor", data[i][0].series.color);
path.setAttribute("coordsize", (area.right-area.left) + "," + (area.bottom-area.top));
path.style.position="absolute";
path.style.top="0px";
path.style.left="0px";
path.style.width=area.right-area.left+"px";
path.style.height=area.bottom-area.top+"px";
var stroke=document.createElement("v:stroke");
stroke.setAttribute("opacity", "0.8");
path.appendChild(stroke);
var fill=document.createElement("v:fill");
fill.setAttribute("opacity", "0.4");
path.appendChild(fill);
var cmd = [];
var r=3;
for(var j=0; j<data[i].length; j++){
var values = data[i];
var x = Math.round(plot.axisX.getCoord(values[j].x, plotarea, plot));
var y = Math.round(plot.axisY.getCoord(values[j].y, plotarea, plot));
if (j==0){
cmd.push("m");
cmd.push(x+","+y);
}else{
cmd.push("l");
cmd.push(x+","+y);
}
// add the circle.
var c = document.createElement("v:oval");
c.setAttribute("strokeweight", "1px");
c.setAttribute("strokecolor", values[j].series.color);
c.setAttribute("fillcolor", values[j].series.color);
var str=document.createElement("v:stroke");
str.setAttribute("opacity","0.8");
c.appendChild(str);
str=document.createElement("v:fill");
str.setAttribute("opacity","0.6");
c.appendChild(str);
var s=c.style;
s.position="absolute";
s.top=(y-r)+"px";
s.left=(x-r)+"px";
s.width=(r*2)+"px";
s.height=(r*2)+"px";
group.appendChild(c);
if(applyTo){ applyTo(c, data[j].src); }
}
// now run the path backwards from the previous series.
if(i == 0){
cmd.push("l");
cmd.push(x + "," + Math.round(plot.axisY.getCoord(plot.axisX.origin, plotarea, plot)));
cmd.push("l");
cmd.push(Math.round(plot.axisX.getCoord(data[0][0].x, plotarea, plot)) + "," + Math.round(plot.axisY.getCoord(plot.axisX.origin, plotarea, plot)));
} else {
var values = data[i-1];
cmd.push("l");
cmd.push(x + "," + Math.round(plot.axisY.getCoord(values[values.length-1].y, plotarea, plot)));
for(var j=values.length-2; j>=0; j--){
var x = Math.round(plot.axisX.getCoord(values[j].x, plotarea, plot));
var y = Math.round(plot.axisY.getCoord(values[j].y, plotarea, plot));
cmd.push("l");
cmd.push(x+","+y);
}
}
path.setAttribute("path", cmd.join(" ")+" x e");
group.appendChild(path);
}
return group; // HTMLDivElement
},
StackedCurvedArea: function(
/* dojo.charting.PlotArea */plotarea,
/* dojo.charting.Plot */plot,
/* object? */kwArgs,
/* function? */applyTo
){
// summary
// Plots a set of stacked areas, using a tensioning factor to soften points.
// Bindings: x/y
var tension = 3;
var area = plotarea.getArea();
var group = dojo.charting.Plotters._group(plotarea);
// precompile the data
var n = plot.series.length; // how many series
var data = [];
var totals = [];
// we're assuming that all series for this plot has the name x assignment for now.
for(var i=0; i<n; i++){
var tmp = plot.series[i].data.evaluate(kwArgs);
// run through and add current totals
for(var j=0; j<tmp.length; j++){
if(i==0){ totals.push(tmp[j].y); }
else { totals[j] += tmp[j].y; }
tmp[j].y = totals[j];
}
data.push(tmp);
}
for(var i=n-1; i>=0; i--){
var path=document.createElement("v:shape");
path.setAttribute("strokeweight", "1px");
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