jqplot.blockRenderer.js
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/**
* jqPlot
* Pure JavaScript plotting plugin using jQuery
*
* Version: 1.0.4
* Revision: 1121
*
* Copyright (c) 2009-2012 Chris Leonello
* jqPlot is currently available for use in all personal or commercial projects
* under both the MIT (http://www.opensource.org/licenses/mit-license.php) and GPL
* version 2.0 (http://www.gnu.org/licenses/gpl-2.0.html) licenses. This means that you can
* choose the license that best suits your project and use it accordingly.
*
* Although not required, the author would appreciate an email letting him
* know of any substantial use of jqPlot. You can reach the author at:
* chris at jqplot dot com or see http://www.jqplot.com/info.php .
*
* If you are feeling kind and generous, consider supporting the project by
* making a donation at: http://www.jqplot.com/donate.php .
*
* sprintf functions contained in jqplot.sprintf.js by Ash Searle:
*
* version 2007.04.27
* author Ash Searle
* http://hexmen.com/blog/2007/03/printf-sprintf/
* http://hexmen.com/js/sprintf.js
* The author (Ash Searle) has placed this code in the public domain:
* "This code is unrestricted: you are free to use it however you like."
*
*/
(function($) {
/**
* Class: $.jqplot.BlockRenderer
* Plugin renderer to draw a x-y block chart. A Block chart has data points displayed as
* colored squares with a text label inside. Data must be supplied in the form:
*
* > [[x1, y1, "label 1", {css}], [x2, y2, "label 2", {css}], ...]
*
* The label and css object are optional. If the label is ommitted, the
* box will collapse unless a css height and/or width is specified.
*
* The css object is an object specifying css properties
* such as:
*
* > {background:'#4f98a5', border:'3px solid gray', padding:'1px'}
*
* Note that css properties specified with the data point override defaults
* specified with the series.
*
*/
$.jqplot.BlockRenderer = function(){
$.jqplot.LineRenderer.call(this);
};
$.jqplot.BlockRenderer.prototype = new $.jqplot.LineRenderer();
$.jqplot.BlockRenderer.prototype.constructor = $.jqplot.BlockRenderer;
// called with scope of a series
$.jqplot.BlockRenderer.prototype.init = function(options) {
// Group: Properties
//
// prop: css
// default css styles that will be applied to all data blocks.
// these values will be overridden by css styles supplied with the
// individulal data points.
this.css = {padding:'2px', border:'1px solid #999', textAlign:'center'};
// prop: escapeHtml
// true to escape html in the box label.
this.escapeHtml = false;
// prop: insertBreaks
// true to turn spaces in data block label into html breaks <br />.
this.insertBreaks = true;
// prop: varyBlockColors
// true to vary the color of each block in this series according to
// the seriesColors array. False to set each block to the color
// specified on this series. This has no effect if a css background color
// option is specified in the renderer css options.
this.varyBlockColors = false;
$.extend(true, this, options);
if (this.css.backgroundColor) {
this.color = this.css.backgroundColor;
}
else if (this.css.background) {
this.color = this.css.background;
}
else if (!this.varyBlockColors) {
this.css.background = this.color;
}
this.canvas = new $.jqplot.BlockCanvas();
this.shadowCanvas = new $.jqplot.BlockCanvas();
this.canvas._plotDimensions = this._plotDimensions;
this.shadowCanvas._plotDimensions = this._plotDimensions;
this._type = 'block';
// group: Methods
//
// Method: moveBlock
// Moves an individual block. More efficient than redrawing
// the whole series by calling plot.drawSeries().
// Properties:
// idx - the 0 based index of the block or point in this series.
// x - the x coordinate in data units (value on x axis) to move the block to.
// y - the y coordinate in data units (value on the y axis) to move the block to.
// duration - optional parameter to create an animated movement. Can be a
// number (higher is slower animation) or 'fast', 'normal' or 'slow'. If not
// provided, the element is moved without any animation.
this.moveBlock = function (idx, x, y, duration) {
// update plotData, stackData, data and gridData
// x and y are in data coordinates.
var el = this.canvas._elem.children(':eq('+idx+')');
this.data[idx][0] = x;
this.data[idx][1] = y;
this._plotData[idx][0] = x;
this._plotData[idx][1] = y;
this._stackData[idx][0] = x;
this._stackData[idx][1] = y;
this.gridData[idx][0] = this._xaxis.series_u2p(x);
this.gridData[idx][1] = this._yaxis.series_u2p(y);
var w = el.outerWidth();
var h = el.outerHeight();
var left = this.gridData[idx][0] - w/2 + 'px';
var top = this.gridData[idx][1] - h/2 + 'px';
if (duration) {
if (parseInt(duration, 10)) {
duration = parseInt(duration, 10);
}
el.animate({left:left, top:top}, duration);
}
else {
el.css({left:left, top:top});
}
el = null;
};
};
// called with scope of series
$.jqplot.BlockRenderer.prototype.draw = function (ctx, gd, options) {
if (this.plugins.pointLabels) {
this.plugins.pointLabels.show = false;
}
var i, el, d, gd, t, css, w, h, left, top;
var opts = (options != undefined) ? options : {};
var colorGenerator = new $.jqplot.ColorGenerator(this.seriesColors);
this.canvas._elem.empty();
for (i=0; i<this.gridData.length; i++) {
d = this.data[i];
gd = this.gridData[i];
t = '';
css = {};
if (typeof d[2] == 'string') {
t = d[2];
}
else if (typeof d[2] == 'object') {
css = d[2];
}
if (typeof d[3] == 'object') {
css = d[3];
}
if (this.insertBreaks){
t = t.replace(/ /g, '<br />');
}
css = $.extend(true, {}, this.css, css);
// create a div
el = $('<div style="position:absolute;margin-left:auto;margin-right:auto;"></div>');
this.canvas._elem.append(el);
// set text
this.escapeHtml ? el.text(t) : el.html(t);
// style it
// remove styles we don't want overridden.
delete css.position;
delete css.marginRight;
delete css.marginLeft;
if (!css.background && !css.backgroundColor && !css.backgroundImage){
css.background = colorGenerator.next();
}
el.css(css);
w = el.outerWidth();
h = el.outerHeight();
left = gd[0] - w/2 + 'px';
top = gd[1] - h/2 + 'px';
el.css({left:left, top:top});
el = null;
}
};
$.jqplot.BlockCanvas = function() {
$.jqplot.ElemContainer.call(this);
this._ctx;
};
$.jqplot.BlockCanvas.prototype = new $.jqplot.ElemContainer();
$.jqplot.BlockCanvas.prototype.constructor = $.jqplot.BlockCanvas;
$.jqplot.BlockCanvas.prototype.createElement = function(offsets, clss, plotDimensions) {
this._offsets = offsets;
var klass = 'jqplot-blockCanvas';
if (clss != undefined) {
klass = clss;
}
var elem;
// if this canvas already has a dom element, don't make a new one.
if (this._elem) {
elem = this._elem.get(0);
}
else {
elem = document.createElement('div');
}
// if new plotDimensions supplied, use them.
if (plotDimensions != undefined) {
this._plotDimensions = plotDimensions;
}
var w = this._plotDimensions.width - this._offsets.left - this._offsets.right + 'px';
var h = this._plotDimensions.height - this._offsets.top - this._offsets.bottom + 'px';
this._elem = $(elem);
this._elem.css({ position: 'absolute', width:w, height:h, left: this._offsets.left, top: this._offsets.top });
this._elem.addClass(klass);
return this._elem;
};
$.jqplot.BlockCanvas.prototype.setContext = function() {
this._ctx = {
canvas:{
width:0,
height:0
},
clearRect:function(){return null;}
};
return this._ctx;
};
})(jQuery);