📄 axis.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.svg.Axis");
dojo.require("dojo.lang.common");
dojo.extend(dojo.charting.Axis, {
renderLines: function(
/* dojo.charting.PlotArea */plotArea,
/* dojo.charting.Plot */plot,
/* string */plane
){
// summary
// Renders any reference lines for this axis.
if(this.nodes.lines){
while(this.nodes.lines.childNodes.length > 0){
this.nodes.lines.removeChild(this.nodes.lines.childNodes[0]);
}
if(this.nodes.lines.parentNode){
this.nodes.lines.parentNode.removeChild(this.nodes.lines);
this.nodes.lines = null;
}
}
var area = plotArea.getArea();
var g = this.nodes.lines = document.createElementNS(dojo.svg.xmlns.svg, "g");
g.setAttribute("id", this.getId()+"-lines");
for(var i=0; i<this._labels.length; i++){
if (this._labels[i].value == this.origin){ continue; }
var v = this.getCoord(this._labels[i].value, plotArea, plot);
var l=document.createElementNS(dojo.svg.xmlns.svg, "line");
l.setAttribute("style","stroke:#999;stroke-width:1px;stroke-dasharray:1,4;");
if(plane == "x"){
l.setAttribute("y1",area.top);
l.setAttribute("y2",area.bottom);
l.setAttribute("x1",v);
l.setAttribute("x2",v);
}
else if (plane == "y"){
l.setAttribute("y1",v);
l.setAttribute("y2",v);
l.setAttribute("x1",area.left);
l.setAttribute("x2",area.right);
}
g.appendChild(l);
}
return g; // SVGGElement
},
renderTicks: function(
/* dojo.charting.PlotArea */plotArea,
/* dojo.charting.Plot */plot,
/* string */plane,
/* float */coord
){
// summary
// Renders any tick lines for this axis.
if(this.nodes.ticks){
while(this.nodes.ticks.childNodes.length > 0){
this.nodes.ticks.removeChild(this.nodes.ticks.childNodes[0]);
}
if(this.nodes.ticks.parentNode){
this.nodes.ticks.parentNode.removeChild(this.nodes.ticks);
this.nodes.ticks = null;
}
}
var g = this.nodes.ticks = document.createElementNS(dojo.svg.xmlns.svg, "g");
g.setAttribute("id", this.getId()+"-ticks");
for(var i=0; i<this._labels.length; i++){
var v = this.getCoord(this._labels[i].value, plotArea, plot);
var l=document.createElementNS(dojo.svg.xmlns.svg, "line");
l.setAttribute("style","stroke:#000;stroke-width:1pt;");
if(plane == "x"){
l.setAttribute("y1",coord);
l.setAttribute("y2",coord+3);
l.setAttribute("x1",v);
l.setAttribute("x2",v);
}
else if (plane == "y"){
l.setAttribute("y1",v);
l.setAttribute("y2",v);
l.setAttribute("x1",coord-2);
l.setAttribute("x2",coord+2);
}
g.appendChild(l);
}
return g; // SVGGElement
},
renderLabels: function(
/* dojo.charting.PlotArea */plotArea,
/* dojo.charting.Plot */plot,
/* string */plane,
/* float */coord,
/* int */textSize,
/* string */anchor
){
// summary
// Render all labels for this axis.
function createLabel(label, x, y, textSize, anchor){
var text = document.createElementNS(dojo.svg.xmlns.svg, "text");
text.setAttribute("x", x);
text.setAttribute("y", (plane=="x"?y:y+2));
text.setAttribute("style", "text-anchor:"+anchor+";font-family:sans-serif;font-size:"+textSize+"px;fill:#000;");
text.appendChild(document.createTextNode(label));
return text;
};
// wipe if needed
if(this.nodes.labels){
while(this.nodes.labels.childNodes.length > 0){
this.nodes.labels.removeChild(this.nodes.labels.childNodes[0]);
}
if(this.nodes.labels.parentNode){
this.nodes.labels.parentNode.removeChild(this.nodes.labels);
this.nodes.labels = null;
}
}
var g = this.nodes.labels = document.createElementNS(dojo.svg.xmlns.svg, "g");
g.setAttribute("id", this.getId()+"-labels");
for(var i=0; i<this._labels.length; i++){
var v = this.getCoord(this._labels[i].value, plotArea, plot);
if(plane == "x"){
g.appendChild(createLabel(this._labels[i].label, v, coord, textSize, anchor));
}
else if (plane == "y"){
g.appendChild(createLabel(this._labels[i].label, coord, v, textSize, anchor));
}
}
return g; // SVGGelement
},
render: function(
/* dojo.charting.PlotArea */plotArea,
/* dojo.charting.Plot */plot,
/* dojo.charting.Axis */drawAgainst,
/* string */plane
){
// summary
// Renders this axis to the given plot.
// get the origin plot point.
var area = plotArea.getArea();
var stroke = 1;
var style = "stroke:#000;stroke-width:"+stroke+"px;";
var textSize=10;
var coord = drawAgainst.getCoord(this.origin, plotArea, plot);
// draw the axis.
this.nodes.main = document.createElementNS(dojo.svg.xmlns.svg, "g");
var g = this.nodes.main;
g.setAttribute("id", this.getId()); // need a handle if we have to kill parts of the axis def.
var line = this.nodes.axis = document.createElementNS(dojo.svg.xmlns.svg, "line");
if(plane == "x"){
line.setAttribute("y1", coord);
line.setAttribute("y2", coord);
line.setAttribute("x1", area.left-stroke);
line.setAttribute("x2", area.right+stroke);
line.setAttribute("style", style);
// set up the labels
var y = coord+textSize+2;
if(this.showLines){
g.appendChild(this.renderLines(plotArea, plot, plane, y));
}
if(this.showTicks){
g.appendChild(this.renderTicks(plotArea, plot, plane, coord));
}
if(this.showLabels){
g.appendChild(this.renderLabels(plotArea, plot, plane, y, textSize, "middle"));
}
if(this.showLabel && this.label){
var x = plotArea.size.width/2;
var text = document.createElementNS(dojo.svg.xmlns.svg, "text");
text.setAttribute("x", x);
text.setAttribute("y", (coord + (textSize*2) + (textSize/2)));
text.setAttribute("style", "text-anchor:middle;font-family:sans-serif;font-weight:bold;font-size:"+(textSize+2)+"px;fill:#000;");
text.appendChild(document.createTextNode(this.label));
g.appendChild(text);
}
} else {
line.setAttribute("x1", coord);
line.setAttribute("x2", coord);
line.setAttribute("y1", area.top);
line.setAttribute("y2", area.bottom);
line.setAttribute("style", style);
// set up the labels
var isMax = this.origin == drawAgainst.range.upper;
var x = coord + (isMax?4:-4);
var anchor = isMax?"start":"end";
if(this.showLines){
g.appendChild(this.renderLines(plotArea, plot, plane, x));
}
if(this.showTicks){
g.appendChild(this.renderTicks(plotArea, plot, plane, coord));
}
if(this.showLabels){
g.appendChild(this.renderLabels(plotArea, plot, plane, x, textSize, anchor));
}
if(this.showLabel && this.label){
var x = isMax?(coord+(textSize*2)+(textSize/2)):(coord-(textSize*4));
var y = plotArea.size.height / 2;
var text = document.createElementNS(dojo.svg.xmlns.svg, "text");
text.setAttribute("x", x);
text.setAttribute("y", y);
text.setAttribute("transform", "rotate(90, " + x + ", " + y + ")");
text.setAttribute("style", "text-anchor:middle;font-family:sans-serif;font-weight:bold;font-size:"+(textSize+2)+"px;fill:#000;");
text.appendChild(document.createTextNode(this.label));
g.appendChild(text);
}
}
g.appendChild(line);
return g; // SVGGElement
}
});
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