0,0 → 1,334 |
/** |
* Copyright (c) 2009 Chris Leonello |
* jqPlot is currently available for use in all personal or commercial projects |
* under both the MIT and GPL version 2.0 licenses. This means that you can |
* choose the license that best suits your project and use it accordingly. |
* |
* The author would appreciate an email letting him know of any substantial |
* use of jqPlot. You can reach the author at: chris dot leonello at gmail |
* dot com or see http://www.jqplot.com/info.php . This is, of course, |
* not required. |
* |
* If you are feeling kind and generous, consider supporting the project by |
* making a donation at: http://www.jqplot.com/donate.php . |
* |
* Thanks for using jqPlot! |
* |
*/ |
(function($) { |
|
// Class: $.jqplot.BarRenderer |
// A plugin renderer for jqPlot to draw a bar plot. |
// Draws series as a line. |
|
$.jqplot.BarRenderer = function(){ |
$.jqplot.LineRenderer.call(this); |
}; |
|
$.jqplot.BarRenderer.prototype = new $.jqplot.LineRenderer(); |
$.jqplot.BarRenderer.prototype.constructor = $.jqplot.BarRenderer; |
|
// called with scope of series. |
$.jqplot.BarRenderer.prototype.init = function(options) { |
// Group: Properties |
// |
// prop: barPadding |
// Number of pixels between adjacent bars at the same axis value. |
this.barPadding = 8; |
// prop: barMargin |
// Number of pixels between groups of bars at adjacent axis values. |
this.barMargin = 10; |
// prop: barDirection |
// 'vertical' = up and down bars, 'horizontal' = side to side bars |
this.barDirection = 'vertical'; |
// prop: barWidth |
// Width of the bar in pixels (auto by devaul). null = calculated automatically. |
this.barWidth = null; |
// prop: shadowOffset |
// offset of the shadow from the slice and offset of |
// each succesive stroke of the shadow from the last. |
this.shadowOffset = 2; |
// prop: shadowDepth |
// number of strokes to apply to the shadow, |
// each stroke offset shadowOffset from the last. |
this.shadowDepth = 5; |
// prop: shadowAlpha |
// transparency of the shadow (0 = transparent, 1 = opaque) |
this.shadowAlpha = 0.08; |
$.extend(true, this, options); |
// fill is still needed to properly draw the legend. |
// bars have to be filled. |
this.fill = true; |
if (this.barDirection == 'vertical' ) { |
this._primaryAxis = '_xaxis'; |
this._stackAxis = 'y'; |
this.fillAxis = 'y'; |
} |
else { |
this._primaryAxis = '_yaxis'; |
this._stackAxis = 'x'; |
this.fillAxis = 'x'; |
} |
// set the shape renderer options |
var opts = {lineJoin:'miter', lineCap:'round', fill:true, isarc:false, strokeStyle:this.color, fillStyle:this.color, closePath:this.fill}; |
this.renderer.shapeRenderer.init(opts); |
// set the shadow renderer options |
var sopts = {lineJoin:'miter', lineCap:'round', fill:true, isarc:false, angle:this.shadowAngle, offset:this.shadowOffset, alpha:this.shadowAlpha, depth:this.shadowDepth, closePath:this.fill}; |
this.renderer.shadowRenderer.init(sopts); |
}; |
|
// called with scope of series |
function barPreInit(target, data, seriesDefaults, options) { |
if (this.rendererOptions.barDirection == 'horizontal') { |
this._stackAxis = 'x'; |
this._primaryAxis = '_yaxis'; |
} |
} |
|
$.jqplot.preSeriesInitHooks.push(barPreInit); |
|
// needs to be called with scope of series, not renderer. |
$.jqplot.BarRenderer.prototype.calcSeriesNumbers = function() { |
var nvals = 0; |
var nseries = 0; |
var paxis = this[this._primaryAxis]; |
var s, series, pos; |
// loop through all series on this axis |
for (var i=0; i < paxis._series.length; i++) { |
series = paxis._series[i]; |
if (series === this) { |
pos = i; |
} |
// is the series rendered as a bar? |
if (series.renderer.constructor == $.jqplot.BarRenderer) { |
// gridData may not be computed yet, use data length insted |
nvals += series.data.length; |
nseries += 1; |
} |
} |
return [nvals, nseries, pos]; |
}; |
|
$.jqplot.BarRenderer.prototype.setBarWidth = function() { |
// need to know how many data values we have on the approprate axis and figure it out. |
var i; |
var nvals = 0; |
var nseries = 0; |
var paxis = this[this._primaryAxis]; |
var s, series, pos; |
var temp = this.renderer.calcSeriesNumbers.call(this); |
nvals = temp[0]; |
nseries = temp[1]; |
var nticks = paxis.numberTicks; |
var nbins = (nticks-1)/2; |
// so, now we have total number of axis values. |
if (paxis.name == 'xaxis' || paxis.name == 'x2axis') { |
if (this._stack) { |
this.barWidth = (paxis._offsets.max - paxis._offsets.min) / nvals * nseries - this.barMargin; |
} |
else { |
this.barWidth = ((paxis._offsets.max - paxis._offsets.min)/nbins - this.barPadding * (nseries-1) - this.barMargin*2)/nseries; |
// this.barWidth = (paxis._offsets.max - paxis._offsets.min) / nvals - this.barPadding - this.barMargin/nseries; |
} |
} |
else { |
if (this._stack) { |
this.barWidth = (paxis._offsets.min - paxis._offsets.max) / nvals * nseries - this.barMargin; |
} |
else { |
this.barWidth = ((paxis._offsets.min - paxis._offsets.max)/nbins - this.barPadding * (nseries-1) - this.barMargin*2)/nseries; |
// this.barWidth = (paxis._offsets.min - paxis._offsets.max) / nvals - this.barPadding - this.barMargin/nseries; |
} |
} |
return [nvals, nseries]; |
}; |
|
$.jqplot.BarRenderer.prototype.draw = function(ctx, gridData, options) { |
var i; |
var opts = (options != undefined) ? options : {}; |
var shadow = (opts.shadow != undefined) ? opts.shadow : this.shadow; |
var showLine = (opts.showLine != undefined) ? opts.showLine : this.showLine; |
var fill = (opts.fill != undefined) ? opts.fill : this.fill; |
var xaxis = this.xaxis; |
var yaxis = this.yaxis; |
var xp = this._xaxis.series_u2p; |
var yp = this._yaxis.series_u2p; |
var pointx, pointy, nvals, nseries, pos; |
|
if (this.barWidth == null) { |
this.renderer.setBarWidth.call(this); |
} |
|
var temp = this.renderer.calcSeriesNumbers.call(this); |
nvals = temp[0]; |
nseries = temp[1]; |
pos = temp[2]; |
|
if (this._stack) { |
this._barNudge = 0; |
} |
else { |
this._barNudge = (-Math.abs(nseries/2 - 0.5) + pos) * (this.barWidth + this.barPadding); |
} |
if (showLine) { |
var negativeColors = new $.jqplot.ColorGenerator(this.negativeSeriesColors); |
var negativeColor = negativeColors.get(this.index); |
var isnegative = false; |
var posfs = opts.fillStyle; |
var tempfs; |
|
if (this.barDirection == 'vertical') { |
for (var i=0; i<gridData.length; i++) { |
points = []; |
var base = gridData[i][0] + this._barNudge; |
var ystart; |
|
// stacked |
if (this._stack && this._prevGridData.length) { |
ystart = this._prevGridData[i][1]; |
} |
// not stacked and first series in stack |
else { |
if (this.fillToZero) { |
ystart = this._yaxis.series_u2p(0); |
} |
else { |
ystart = ctx.canvas.height; |
} |
} |
if (this.fillToZero && this._plotData[i][1] < 0) { |
isnegative = true; |
opts.fillStyle = negativeColor; |
} |
else { |
opts.fillStyle = posfs; |
isnegative = false; |
} |
|
points.push([base-this.barWidth/2, ystart]); |
points.push([base-this.barWidth/2, gridData[i][1]]); |
points.push([base+this.barWidth/2, gridData[i][1]]); |
points.push([base+this.barWidth/2, ystart]); |
// now draw the shadows if not stacked. |
// for stacked plots, they are predrawn by drawShadow |
if (shadow && !this._stack) { |
this.renderer.shadowRenderer.draw(ctx, points, opts); |
} |
this.renderer.shapeRenderer.draw(ctx, points, opts); |
} |
} |
|
else if (this.barDirection == 'horizontal'){ |
for (var i=0; i<gridData.length; i++) { |
points = []; |
var base = gridData[i][1] - this._barNudge; |
var xstart; |
|
if (this._stack && this._prevGridData.length) { |
xstart = this._prevGridData[i][0]; |
} |
else { |
xstart = 0; |
} |
|
points.push([xstart, base+this.barWidth/2]); |
points.push([gridData[i][0], base+this.barWidth/2]); |
points.push([gridData[i][0], base-this.barWidth/2]); |
points.push([xstart, base-this.barWidth/2]); |
// now draw the shadows if not stacked. |
// for stacked plots, they are predrawn by drawShadow |
if (shadow && !this._stack) { |
this.renderer.shadowRenderer.draw(ctx, points, opts); |
} |
this.renderer.shapeRenderer.draw(ctx, points, opts); |
} |
} |
} |
|
}; |
|
|
// for stacked plots, shadows will be pre drawn by drawShadow. |
$.jqplot.BarRenderer.prototype.drawShadow = function(ctx, gridData, options) { |
var i; |
var opts = (options != undefined) ? options : {}; |
var shadow = (opts.shadow != undefined) ? opts.shadow : this.shadow; |
var showLine = (opts.showLine != undefined) ? opts.showLine : this.showLine; |
var fill = (opts.fill != undefined) ? opts.fill : this.fill; |
var xaxis = this.xaxis; |
var yaxis = this.yaxis; |
var xp = this._xaxis.series_u2p; |
var yp = this._yaxis.series_u2p; |
var pointx, pointy, nvals, nseries, pos; |
|
if (this._stack && this.shadow) { |
if (this.barWidth == null) { |
this.renderer.setBarWidth.call(this); |
} |
|
var temp = this.renderer.calcSeriesNumbers.call(this); |
nvals = temp[0]; |
nseries = temp[1]; |
pos = temp[2]; |
|
if (this._stack) { |
this._barNudge = 0; |
} |
else { |
this._barNudge = (-Math.abs(nseries/2 - 0.5) + pos) * (this.barWidth + this.barPadding); |
} |
if (showLine) { |
|
if (this.barDirection == 'vertical') { |
for (var i=0; i<gridData.length; i++) { |
points = []; |
var base = gridData[i][0] + this._barNudge; |
var ystart; |
|
if (this._stack && this._prevGridData.length) { |
ystart = this._prevGridData[i][1]; |
} |
else { |
if (this.fillToZero) { |
ystart = this._yaxis.series_u2p(0); |
} |
else { |
ystart = ctx.canvas.height; |
} |
} |
|
points.push([base-this.barWidth/2, ystart]); |
points.push([base-this.barWidth/2, gridData[i][1]]); |
points.push([base+this.barWidth/2, gridData[i][1]]); |
points.push([base+this.barWidth/2, ystart]); |
this.renderer.shadowRenderer.draw(ctx, points, opts); |
} |
} |
|
else if (this.barDirection == 'horizontal'){ |
for (var i=0; i<gridData.length; i++) { |
points = []; |
var base = gridData[i][1] - this._barNudge; |
var xstart; |
|
if (this._stack && this._prevGridData.length) { |
xstart = this._prevGridData[i][0]; |
} |
else { |
xstart = 0; |
} |
|
points.push([xstart, base+this.barWidth/2]); |
points.push([gridData[i][0], base+this.barWidth/2]); |
points.push([gridData[i][0], base-this.barWidth/2]); |
points.push([xstart, base-this.barWidth/2]); |
this.renderer.shadowRenderer.draw(ctx, points, opts); |
} |
} |
} |
|
} |
|
|
}; |
})(jQuerySysStatWidget || jQuery); |