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/*
PlotKit Legend
==============
Handles laying out legend into a DIV element.
Design taken from comments of Julien Wajsberg (http://
groups.google.com/group/plotkit/browse_thread/thread/2494bd88e6e9956d)
and Niel Domingo (http://nieldomingo.blogspot.com/2007/03/legend-
for-plotkit-bar-charts.html).
Copyright
---------
Copyright 2007 (c) Ashley Martens <ashleym_72^yahoo.com>
For use under the BSD license. <http://www.liquidx.net/plotkit>
*/
try {
if (typeof(MochiKit.Base) == 'undefined' ||
typeof(MochiKit.DOM) == 'undefined' ||
typeof(MochiKit.Color) == 'undefined' ||
typeof(MochiKit.Format) == 'undefined' ||
typeof(PlotKit.Layout) == 'undefined' ||
typeof(PlotKit.Base) == 'undefined')
{
throw "";
}
}
catch (e) {
throw "PlotKit depends on MochiKit.{Base,Color,DOM,Format}"
}
if (typeof(PlotKit.LegendRenderer) == 'undefined') {
PlotKit.LegendRenderer = {};
}
PlotKit.LegendRenderer = function(element, layout, options) {
if (arguments.length > 0)
this.__init__(element, layout, options);
};
PlotKit.LegendRenderer.NAME = "PlotKit.LegendRenderer";
PlotKit.LegendRenderer.VERSION = PlotKit.VERSION;
PlotKit.LegendRenderer.__repr__ = function() {
return "[" + this.NAME + " " + this.VERSION + "]";
};
PlotKit.LegendRenderer.toString = function() {
return this.__repr__();
}
PlotKit.LegendRenderer.prototype.__init__ = function(element, layout,
options) {
var isNil = MochiKit.Base.isUndefinedOrNull;
var Color = MochiKit.Color.Color;
this.options = {
"colorScheme": PlotKit.Base.palette(PlotKit.Base.baseColors()
[0]),
"legendStyle": "table",
"tableColumns": 1
};
MochiKit.Base.update(this.options, options ? options : {});
this.layout = layout;
this.element = MochiKit.DOM.getElement(element);
// --- check whether everything is ok before we return
if (isNil(this.element))
throw "CRILegend() - passed legend is not found";
};
PlotKit.LegendRenderer.prototype.render = function() {
var colorScheme = this.options.colorScheme;
var setNames = PlotKit.Base.keys(this.layout.datasets);
MochiKit.DOM.updateNodeAttributes(this.element,
{"style":
{"margin":"0"
,"padding":"0"
}
});
var ul = null;
if (this.options.legendStyle == "table")
ul = this._renderListTable(colorScheme, setNames);
else
ul = this._renderList(colorScheme, setNames);
MochiKit.DOM.appendChildNodes(this.element, ul);
};
PlotKit.LegendRenderer.prototype._renderList = function(colorScheme,
setNames) {
var ul = document.createElement("ul");
ul.style.listStyle="none";
ul.style.margin="0";
ul.style.padding="0";
var colorCount = colorScheme.length;
var setCount = setNames.length;
for (var i = 0; i < setCount; i++) {
var setName = setNames[i];
var color = colorScheme[i%colorCount];
var le = this._renderElement(setName, color.toRGBString());
ul.appendChild(le);
}
return ul;
};
PlotKit.LegendRenderer.prototype._renderElement = function(title,
color) {
var le = MochiKit.DOM.createDOM("li");
le.style.listStyle="none";
le.style.margin="0 0 5px 0";
le.style.padding="0";
var box = MochiKit.DOM.createDOM("div");
box.style.backgroundColor=color;
box.style.width="2em";
box.style.height=".9em";
box.style.border="1px solid black";
box.style.margin="0 5px 0 0";
box.style.padding="0";
box.style.float="left";
box.style.cssFloat="left";
box.style.clear="left";
box.style.cssClear="left";
var span = MochiKit.DOM.createDOM("span");
MochiKit.DOM.appendChildNodes(span,
document.createTextNode(title));
MochiKit.DOM.appendChildNodes(le, box, span);
return le;
};
PlotKit.LegendRenderer.prototype._renderListTable =
function(colorScheme, setNames) {
var tabhead = THEAD(null);
var tabfoot = TFOOT(null);
var tabbody = partial(TBODY, null);
var i = 0;
var colorcount = colorScheme.length;
var tabrow;
var columns = this.options.tableColumns;
for (var label in setNames)
{
var legendcolor = colorScheme[i%colorcount];
var legendbox = DIV({'class': 'legendbox', 'className':
'legendbox'});
legendbox.style.width = "10px";
legendbox.style.height = "10px";
legendbox.style.backgroundColor = legendcolor.toHexString();
legendbox.style.borderWidth = "1px";
legendbox.style.borderStyle = "solid";
legendbox.style.borderColor = "#000000";
var boxcell = TD(null, legendbox);
var labelcell = TD({'class': 'legendlabel', 'className':
'legendlabel'}, setNames[i]);
labelcell.style.font = 'normal 10pt arial';
if (!(i % columns))
{
tabrow = partial(TR, null);
}
tabrow = partial(tabrow, boxcell, labelcell);
if (i % columns)
{
tabrow = tabrow(null);
tabbody = partial(tabbody, tabrow);
}
i++;
}
if ((setNames % columns))
{
tabrow = tabrow(TD(null), TD(null));
tabbody = partial(tabbody, tabrow);
}
tabbody = tabbody(null);
tab = TABLE({'class': 'legendcontainer', 'className':
'legendcontainer'}, tabhead, tabfoot, tabbody);
tab.style.marginTop = '1em';
tab.style.marginLeft = '1.5em';
tab.style.marginBottom = '1em';
tab.style.borderWidth = '1px';
tab.style.borderStyle = 'solid';
tab.style.borderColor = '#000000';
return tab;
};
// Namespace Iniitialisation
PlotKit.Legend = {}
PlotKit.Legend.LegendRenderer = PlotKit.LegendRenderer;
PlotKit.Legend.EXPORT = [
"LegendRenderer"
];
PlotKit.Legend.EXPORT_OK = [
"LegendRenderer"
];
PlotKit.Legend.__new__ = function() {
var m = MochiKit.Base;
m.nameFunctions(this);
this.EXPORT_TAGS = {
":common": this.EXPORT,
":all": m.concat(this.EXPORT, this.EXPORT_OK)
};
};
PlotKit.Legend.__new__();
MochiKit.Base._exportSymbols(this, PlotKit.Legend);
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