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/* |
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Flot plugin for rendering pie charts. The plugin assumes the data is |
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coming is as a single data value for each series, and each of those |
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values is a positive value or zero (negative numbers don't make |
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any sense and will cause strange effects). The data values do |
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NOT need to be passed in as percentage values because it |
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internally calculates the total and percentages. |
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|
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* Created by Brian Medendorp, June 2009 |
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* Updated November 2009 with contributions from: btburnett3, Anthony Aragues and Xavi Ivars |
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|
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* Changes: |
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2009-10-22: lineJoin set to round |
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2009-10-23: IE full circle fix, donut |
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2009-11-11: Added basic hover from btburnett3 - does not work in IE, and center is off in Chrome and Opera |
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2009-11-17: Added IE hover capability submitted by Anthony Aragues |
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2009-11-18: Added bug fix submitted by Xavi Ivars (issues with arrays when other JS libraries are included as well) |
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|
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|
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Available options are: |
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series: { |
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pie: { |
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show: true/false |
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radius: 0-1 for percentage of fullsize, or a specified pixel length, or 'auto' |
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innerRadius: 0-1 for percentage of fullsize or a specified pixel length, for creating a donut effect |
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startAngle: 0-2 factor of PI used for starting angle (in radians) i.e 3/2 starts at the top, 0 and 2 have the same result |
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tilt: 0-1 for percentage to tilt the pie, where 1 is no tilt, and 0 is completely flat (nothing will show) |
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offset: { |
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top: integer value to move the pie up or down |
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left: integer value to move the pie left or right, or 'auto' |
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}, |
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stroke: { |
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color: any hexidecimal color value (other formats may or may not work, so best to stick with something like '#FFF') |
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width: integer pixel width of the stroke |
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}, |
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label: { |
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show: true/false, or 'auto' |
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formatter: a user-defined function that modifies the text/style of the label text |
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radius: 0-1 for percentage of fullsize, or a specified pixel length |
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background: { |
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color: any hexidecimal color value (other formats may or may not work, so best to stick with something like '#000') |
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opacity: 0-1 |
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}, |
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threshold: 0-1 for the percentage value at which to hide labels (if they're too small) |
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}, |
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combine: { |
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threshold: 0-1 for the percentage value at which to combine slices (if they're too small) |
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color: any hexidecimal color value (other formats may or may not work, so best to stick with something like '#CCC'), if null, the plugin will automatically use the color of the first slice to be combined |
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label: any text value of what the combined slice should be labeled |
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} |
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highlight: { |
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opacity: 0-1 |
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} |
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} |
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} |
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|
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More detail and specific examples can be found in the included HTML file. |
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|
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*/ |
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|
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(function ($) |
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{ |
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function init(plot) // this is the "body" of the plugin |
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{ |
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var canvas = null; |
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var target = null; |
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var maxRadius = null; |
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var centerLeft = null; |
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var centerTop = null; |
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var total = 0; |
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var redraw = true; |
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var redrawAttempts = 10; |
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var shrink = 0.95; |
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var legendWidth = 0; |
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var processed = false; |
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var raw = false; |
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|
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// interactive variables |
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var highlights = []; |
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|
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// add hook to determine if pie plugin in enabled, and then perform necessary operations |
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plot.hooks.processOptions.push(checkPieEnabled); |
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plot.hooks.bindEvents.push(bindEvents); |
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|
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// check to see if the pie plugin is enabled |
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function checkPieEnabled(plot, options) |
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{ |
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if (options.series.pie.show) |
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{ |
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//disable grid |
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options.grid.show = false; |
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|
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// set labels.show |
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if (options.series.pie.label.show=='auto') |
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if (options.legend.show) |
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options.series.pie.label.show = false; |
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else |
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options.series.pie.label.show = true; |
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|
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// set radius |
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if (options.series.pie.radius=='auto') |
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if (options.series.pie.label.show) |
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options.series.pie.radius = 3/4; |
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else |
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options.series.pie.radius = 1; |
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|
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// ensure sane tilt |
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if (options.series.pie.tilt>1) |
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options.series.pie.tilt=1; |
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if (options.series.pie.tilt<0) |
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options.series.pie.tilt=0; |
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|
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// add processData hook to do transformations on the data |
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plot.hooks.processDatapoints.push(processDatapoints); |
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plot.hooks.drawOverlay.push(drawOverlay); |
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|
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// add draw hook |
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plot.hooks.draw.push(draw); |
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} |
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} |
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|
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// bind hoverable events |
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function bindEvents(plot, eventHolder) |
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{ |
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var options = plot.getOptions(); |
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|
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if (options.series.pie.show && options.grid.hoverable) |
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eventHolder.unbind('mousemove').mousemove(onMouseMove); |
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|
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if (options.series.pie.show && options.grid.clickable) |
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eventHolder.unbind('click').click(onClick); |
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} |
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|
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|
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// debugging function that prints out an object |
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function alertObject(obj) |
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{ |
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var msg = ''; |
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function traverse(obj, depth) |
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{ |
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if (!depth) |
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depth = 0; |
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for (var i = 0; i < obj.length; ++i) |
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{ |
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for (var j=0; j<depth; j++) |
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msg += '\t'; |
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|
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if( typeof obj[i] == "object") |
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{ // its an object |
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msg += ''+i+':\n'; |
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traverse(obj[i], depth+1); |
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} |
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else |
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{ // its a value |
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msg += ''+i+': '+obj[i]+'\n'; |
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} |
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} |
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} |
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traverse(obj); |
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alert(msg); |
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} |
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|
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function calcTotal(data) |
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{ |
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for (var i = 0; i < data.length; ++i) |
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{ |
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var item = parseFloat(data[i].data[0][1]); |
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if (item) |
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total += item; |
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} |
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} |
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|
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function processDatapoints(plot, series, data, datapoints) |
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{ |
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if (!processed) |
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{ |
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processed = true; |
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|
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canvas = plot.getCanvas(); |
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target = $(canvas).parent(); |
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options = plot.getOptions(); |
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|
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plot.setData(combine(plot.getData())); |
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} |
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} |
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|
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function setupPie() |
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{ |
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legendWidth = target.children().filter('.legend').children().width(); |
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|
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// calculate maximum radius and center point |
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maxRadius = Math.min(canvas.width,(canvas.height/options.series.pie.tilt))/2; |
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centerTop = (canvas.height/2)+options.series.pie.offset.top; |
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centerLeft = (canvas.width/2); |
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|
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if (options.series.pie.offset.left=='auto') |
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if (options.legend.position.match('w')) |
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centerLeft += legendWidth/2; |
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else |
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centerLeft -= legendWidth/2; |
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else |
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centerLeft += options.series.pie.offset.left; |
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|
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if (centerLeft<maxRadius) |
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centerLeft = maxRadius; |
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else if (centerLeft>canvas.width-maxRadius) |
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centerLeft = canvas.width-maxRadius; |
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} |
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|
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function fixData(data) |
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{ |
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for (var i = 0; i < data.length; ++i) |
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{ |
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if (typeof(data[i].data)=='number') |
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data[i].data = [[1,data[i].data]]; |
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else if (typeof(data[i].data)=='undefined' || typeof(data[i].data[0])=='undefined') |
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{ |
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if (typeof(data[i].data)!='undefined' && typeof(data[i].data.label)!='undefined') |
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data[i].label = data[i].data.label; // fix weirdness coming from flot |
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data[i].data = [[1,0]]; |
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|
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} |
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} |
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return data; |
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} |
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|
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function combine(data) |
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{ |
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data = fixData(data); |
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calcTotal(data); |
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var combined = 0; |
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var numCombined = 0; |
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var color = options.series.pie.combine.color; |
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|
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var newdata = []; |
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for (var i = 0; i < data.length; ++i) |
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{ |
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// make sure its a number |
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data[i].data[0][1] = parseFloat(data[i].data[0][1]); |
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if (!data[i].data[0][1]) |
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data[i].data[0][1] = 0; |
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|
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if (data[i].data[0][1]/total<=options.series.pie.combine.threshold) |
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{ |
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combined += data[i].data[0][1]; |
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numCombined++; |
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if (!color) |
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color = data[i].color; |
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} |
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else |
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{ |
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newdata.push({ |
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data: [[1,data[i].data[0][1]]], |
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color: data[i].color, |
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label: data[i].label, |
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angle: (data[i].data[0][1]*(Math.PI*2))/total, |
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percent: (data[i].data[0][1]/total*100) |
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}); |
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} |
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} |
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if (numCombined>0) |
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newdata.push({ |
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data: [[1,combined]], |
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color: color, |
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label: options.series.pie.combine.label, |
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angle: (combined*(Math.PI*2))/total, |
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percent: (combined/total*100) |
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}); |
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return newdata; |
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} |
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|
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function draw(plot, newCtx) |
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{ |
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if (!target) return; // if no series were passed |
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ctx = newCtx; |
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|
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setupPie(); |
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var slices = plot.getData(); |
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|
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var attempts = 0; |
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while (redraw && attempts<redrawAttempts) |
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{ |
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redraw = false; |
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if (attempts>0) |
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maxRadius *= shrink; |
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attempts += 1; |
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clear(); |
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if (options.series.pie.tilt<=0.8) |
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drawShadow(); |
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drawPie(); |
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} |
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if (attempts >= redrawAttempts) { |
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clear(); |
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target.prepend('<div class="error">Could not draw pie with labels contained inside canvas</div>'); |
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} |
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|
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if ( plot.setSeries && plot.insertLegend ) |
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{ |
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plot.setSeries(slices); |
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plot.insertLegend(); |
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} |
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|
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// we're actually done at this point, just defining internal functions at this point |
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|
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function clear() |
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{ |
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ctx.clearRect(0,0,canvas.width,canvas.height); |
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target.children().filter('.pieLabel, .pieLabelBackground').remove(); |
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} |
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|
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function drawShadow() |
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{ |
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var shadowLeft = 5; |
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var shadowTop = 15; |
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var edge = 10; |
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var alpha = 0.02; |
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|
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// set radius |
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if (options.series.pie.radius>1) |
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var radius = options.series.pie.radius; |
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else |
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var radius = maxRadius * options.series.pie.radius; |
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|
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if (radius>=(canvas.width/2)-shadowLeft || radius*options.series.pie.tilt>=(canvas.height/2)-shadowTop || radius<=edge) |
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return; // shadow would be outside canvas, so don't draw it |
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|
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ctx.save(); |
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ctx.translate(shadowLeft,shadowTop); |
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ctx.globalAlpha = alpha; |
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ctx.fillStyle = '#000'; |
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|
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// center and rotate to starting position |
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ctx.translate(centerLeft,centerTop); |
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ctx.scale(1, options.series.pie.tilt); |
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|
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//radius -= edge; |
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for (var i=1; i<=edge; i++) |
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{ |
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ctx.beginPath(); |
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ctx.arc(0,0,radius,0,Math.PI*2,false); |
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ctx.fill(); |
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radius -= i; |
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} |
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|
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ctx.restore(); |
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} |
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|
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function drawPie() |
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{ |
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startAngle = Math.PI*options.series.pie.startAngle; |
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|
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// set radius |
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if (options.series.pie.radius>1) |
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var radius = options.series.pie.radius; |
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else |
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var radius = maxRadius * options.series.pie.radius; |
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|
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// center and rotate to starting position |
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ctx.save(); |
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ctx.translate(centerLeft,centerTop); |
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ctx.scale(1, options.series.pie.tilt); |
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//ctx.rotate(startAngle); // start at top; -- This doesn't work properly in Opera |
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|
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// draw slices |
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ctx.save(); |
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var currentAngle = startAngle; |
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for (var i = 0; i < slices.length; ++i) |
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{ |
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slices[i].startAngle = currentAngle; |
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drawSlice(slices[i].angle, slices[i].color, true); |
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} |
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ctx.restore(); |
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|
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// draw slice outlines |
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ctx.save(); |
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ctx.lineWidth = options.series.pie.stroke.width; |
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currentAngle = startAngle; |
| 378 |
for (var i = 0; i < slices.length; ++i) |
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drawSlice(slices[i].angle, options.series.pie.stroke.color, false); |
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ctx.restore(); |
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|
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// draw donut hole |
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drawDonutHole(ctx); |
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|
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// draw labels |
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if (options.series.pie.label.show) |
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drawLabels(); |
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|
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// restore to original state |
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ctx.restore(); |
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|
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function drawSlice(angle, color, fill) |
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{ |
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if (angle<=0) |
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return; |
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|
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if (fill) |
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ctx.fillStyle = color; |
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else |
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{ |
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ctx.strokeStyle = color; |
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ctx.lineJoin = 'round'; |
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} |
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|
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ctx.beginPath(); |
| 406 |
if (Math.abs(angle - Math.PI*2) > 0.000000001) |
| 407 |
ctx.moveTo(0,0); // Center of the pie |
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else if ($.browser.msie) |
| 409 |
angle -= 0.0001; |
| 410 |
//ctx.arc(0,0,radius,0,angle,false); // This doesn't work properly in Opera |
| 411 |
ctx.arc(0,0,radius,currentAngle,currentAngle+angle,false); |
| 412 |
ctx.closePath(); |
| 413 |
//ctx.rotate(angle); // This doesn't work properly in Opera |
| 414 |
currentAngle += angle; |
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|
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if (fill) |
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ctx.fill(); |
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else |
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ctx.stroke(); |
| 420 |
} |
| 421 |
|
| 422 |
function drawLabels() |
| 423 |
{ |
| 424 |
var currentAngle = startAngle; |
| 425 |
|
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// set radius |
| 427 |
if (options.series.pie.label.radius>1) |
| 428 |
var radius = options.series.pie.label.radius; |
| 429 |
else |
| 430 |
var radius = maxRadius * options.series.pie.label.radius; |
| 431 |
|
| 432 |
for (var i = 0; i < slices.length; ++i) |
| 433 |
{ |
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if (slices[i].percent >= options.series.pie.label.threshold*100) |
| 435 |
drawLabel(slices[i], currentAngle, i); |
| 436 |
currentAngle += slices[i].angle; |
| 437 |
} |
| 438 |
|
| 439 |
function drawLabel(slice, startAngle, index) |
| 440 |
{ |
| 441 |
if (slice.data[0][1]==0) |
| 442 |
return; |
| 443 |
|
| 444 |
// format label text |
| 445 |
var lf = options.legend.labelFormatter, text, plf = options.series.pie.label.formatter; |
| 446 |
if (lf) |
| 447 |
text = lf(slice.label, slice); |
| 448 |
else |
| 449 |
text = slice.label; |
| 450 |
if (plf) |
| 451 |
text = plf(text, slice); |
| 452 |
|
| 453 |
var halfAngle = ((startAngle+slice.angle) + startAngle)/2; |
| 454 |
var x = centerLeft + Math.round(Math.cos(halfAngle) * radius); |
| 455 |
var y = centerTop + Math.round(Math.sin(halfAngle) * radius) * options.series.pie.tilt; |
| 456 |
|
| 457 |
var html = '<span class="pieLabel" id="pieLabel'+index+'" style="position:absolute;top:' + y + 'px;left:' + x + 'px;">' + text + "</span>"; |
| 458 |
target.append(html); |
| 459 |
var label = target.children('#pieLabel'+index); |
| 460 |
var labelTop = (y - label.height()/2); |
| 461 |
var labelLeft = (x - label.width()/2); |
| 462 |
label.css('top', labelTop); |
| 463 |
label.css('left', labelLeft); |
| 464 |
|
| 465 |
// check to make sure that the label is not outside the canvas |
| 466 |
if (0-labelTop>0 || 0-labelLeft>0 || canvas.height-(labelTop+label.height())<0 || canvas.width-(labelLeft+label.width())<0) |
| 467 |
redraw = true; |
| 468 |
|
| 469 |
if (options.series.pie.label.background.opacity != 0) { |
| 470 |
// put in the transparent background separately to avoid blended labels and label boxes |
| 471 |
var c = options.series.pie.label.background.color; |
| 472 |
if (c == null) { |
| 473 |
c = slice.color; |
| 474 |
} |
| 475 |
var pos = 'top:'+labelTop+'px;left:'+labelLeft+'px;'; |
| 476 |
$('<div class="pieLabelBackground" style="position:absolute;width:' + label.width() + 'px;height:' + label.height() + 'px;' + pos +'background-color:' + c + ';"> </div>').insertBefore(label).css('opacity', options.series.pie.label.background.opacity); |
| 477 |
} |
| 478 |
} // end individual label function |
| 479 |
} // end drawLabels function |
| 480 |
} // end drawPie function |
| 481 |
} // end draw function |
| 482 |
|
| 483 |
// Placed here because it needs to be accessed from multiple locations |
| 484 |
function drawDonutHole(layer) |
| 485 |
{ |
| 486 |
// draw donut hole |
| 487 |
if(options.series.pie.innerRadius > 0) |
| 488 |
{ |
| 489 |
// subtract the center |
| 490 |
layer.save(); |
| 491 |
innerRadius = options.series.pie.innerRadius > 1 ? options.series.pie.innerRadius : maxRadius * options.series.pie.innerRadius; |
| 492 |
layer.globalCompositeOperation = 'destination-out'; // this does not work with excanvas, but it will fall back to using the stroke color |
| 493 |
layer.beginPath(); |
| 494 |
layer.fillStyle = options.series.pie.stroke.color; |
| 495 |
layer.arc(0,0,innerRadius,0,Math.PI*2,false); |
| 496 |
layer.fill(); |
| 497 |
layer.closePath(); |
| 498 |
layer.restore(); |
| 499 |
|
| 500 |
// add inner stroke |
| 501 |
layer.save(); |
| 502 |
layer.beginPath(); |
| 503 |
layer.strokeStyle = options.series.pie.stroke.color; |
| 504 |
layer.arc(0,0,innerRadius,0,Math.PI*2,false); |
| 505 |
layer.stroke(); |
| 506 |
layer.closePath(); |
| 507 |
layer.restore(); |
| 508 |
// TODO: add extra shadow inside hole (with a mask) if the pie is tilted. |
| 509 |
} |
| 510 |
} |
| 511 |
|
| 512 |
//-- Additional Interactive related functions -- |
| 513 |
|
| 514 |
function isPointInPoly(poly, pt) |
| 515 |
{ |
| 516 |
for(var c = false, i = -1, l = poly.length, j = l - 1; ++i < l; j = i) |
| 517 |
((poly[i][1] <= pt[1] && pt[1] < poly[j][1]) || (poly[j][1] <= pt[1] && pt[1]< poly[i][1])) |
| 518 |
&& (pt[0] < (poly[j][0] - poly[i][0]) * (pt[1] - poly[i][1]) / (poly[j][1] - poly[i][1]) + poly[i][0]) |
| 519 |
&& (c = !c); |
| 520 |
return c; |
| 521 |
} |
| 522 |
|
| 523 |
function findNearbySlice(mouseX, mouseY) |
| 524 |
{ |
| 525 |
var slices = plot.getData(), |
| 526 |
options = plot.getOptions(), |
| 527 |
radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius; |
| 528 |
|
| 529 |
for (var i = 0; i < slices.length; ++i) |
| 530 |
{ |
| 531 |
var s = slices[i]; |
| 532 |
|
| 533 |
if(s.pie.show) |
| 534 |
{ |
| 535 |
ctx.save(); |
| 536 |
ctx.beginPath(); |
| 537 |
ctx.moveTo(0,0); // Center of the pie |
| 538 |
//ctx.scale(1, options.series.pie.tilt); // this actually seems to break everything when here. |
| 539 |
ctx.arc(0,0,radius,s.startAngle,s.startAngle+s.angle,false); |
| 540 |
ctx.closePath(); |
| 541 |
x = mouseX-centerLeft; |
| 542 |
y = mouseY-centerTop; |
| 543 |
if(ctx.isPointInPath) |
| 544 |
{ |
| 545 |
if (ctx.isPointInPath(mouseX-centerLeft, mouseY-centerTop)) |
| 546 |
{ |
| 547 |
//alert('found slice!'); |
| 548 |
ctx.restore(); |
| 549 |
return {datapoint: [s.percent, s.data], dataIndex: 0, series: s, seriesIndex: i}; |
| 550 |
} |
| 551 |
} |
| 552 |
else |
| 553 |
{ |
| 554 |
// excanvas for IE doesn;t support isPointInPath, this is a workaround. |
| 555 |
p1X = (radius * Math.cos(s.startAngle)); |
| 556 |
p1Y = (radius * Math.sin(s.startAngle)); |
| 557 |
p2X = (radius * Math.cos(s.startAngle+(s.angle/4))); |
| 558 |
p2Y = (radius * Math.sin(s.startAngle+(s.angle/4))); |
| 559 |
p3X = (radius * Math.cos(s.startAngle+(s.angle/2))); |
| 560 |
p3Y = (radius * Math.sin(s.startAngle+(s.angle/2))); |
| 561 |
p4X = (radius * Math.cos(s.startAngle+(s.angle/1.5))); |
| 562 |
p4Y = (radius * Math.sin(s.startAngle+(s.angle/1.5))); |
| 563 |
p5X = (radius * Math.cos(s.startAngle+s.angle)); |
| 564 |
p5Y = (radius * Math.sin(s.startAngle+s.angle)); |
| 565 |
arrPoly = [[0,0],[p1X,p1Y],[p2X,p2Y],[p3X,p3Y],[p4X,p4Y],[p5X,p5Y]]; |
| 566 |
arrPoint = [x,y]; |
| 567 |
// TODO: perhaps do some mathmatical trickery here with the Y-coordinate to compensate for pie tilt? |
| 568 |
if(isPointInPoly(arrPoly, arrPoint)) |
| 569 |
{ |
| 570 |
ctx.restore(); |
| 571 |
return {datapoint: [s.percent, s.data], dataIndex: 0, series: s, seriesIndex: i}; |
| 572 |
} |
| 573 |
} |
| 574 |
ctx.restore(); |
| 575 |
} |
| 576 |
} |
| 577 |
|
| 578 |
return null; |
| 579 |
} |
| 580 |
|
| 581 |
function onMouseMove(e) |
| 582 |
{ |
| 583 |
triggerClickHoverEvent('plothover', e); |
| 584 |
} |
| 585 |
|
| 586 |
function onClick(e) |
| 587 |
{ |
| 588 |
triggerClickHoverEvent('plotclick', e); |
| 589 |
} |
| 590 |
|
| 591 |
// trigger click or hover event (they send the same parameters so we share their code) |
| 592 |
function triggerClickHoverEvent(eventname, e) |
| 593 |
{ |
| 594 |
var offset = plot.offset(), |
| 595 |
canvasX = parseInt(e.pageX - offset.left), |
| 596 |
canvasY = parseInt(e.pageY - offset.top), |
| 597 |
item = findNearbySlice(canvasX, canvasY); |
| 598 |
|
| 599 |
if (options.grid.autoHighlight) |
| 600 |
{ |
| 601 |
// clear auto-highlights |
| 602 |
for (var i = 0; i < highlights.length; ++i) |
| 603 |
{ |
| 604 |
var h = highlights[i]; |
| 605 |
if (h.auto == eventname && !(item && h.series == item.series)) |
| 606 |
unhighlight(h.series); |
| 607 |
} |
| 608 |
} |
| 609 |
|
| 610 |
// highlight the slice |
| 611 |
if (item) |
| 612 |
highlight(item.series, eventname); |
| 613 |
|
| 614 |
// trigger any hover bind events |
| 615 |
var pos = { pageX: e.pageX, pageY: e.pageY }; |
| 616 |
target.trigger(eventname, [ pos, item ]); |
| 617 |
} |
| 618 |
|
| 619 |
function highlight(s, auto) |
| 620 |
{ |
| 621 |
if (typeof s == "number") |
| 622 |
s = series[s]; |
| 623 |
|
| 624 |
var i = indexOfHighlight(s); |
| 625 |
if (i == -1) |
| 626 |
{ |
| 627 |
highlights.push({ series: s, auto: auto }); |
| 628 |
plot.triggerRedrawOverlay(); |
| 629 |
} |
| 630 |
else if (!auto) |
| 631 |
highlights[i].auto = false; |
| 632 |
} |
| 633 |
|
| 634 |
function unhighlight(s) |
| 635 |
{ |
| 636 |
if (s == null) |
| 637 |
{ |
| 638 |
highlights = []; |
| 639 |
plot.triggerRedrawOverlay(); |
| 640 |
} |
| 641 |
|
| 642 |
if (typeof s == "number") |
| 643 |
s = series[s]; |
| 644 |
|
| 645 |
var i = indexOfHighlight(s); |
| 646 |
if (i != -1) |
| 647 |
{ |
| 648 |
highlights.splice(i, 1); |
| 649 |
plot.triggerRedrawOverlay(); |
| 650 |
} |
| 651 |
} |
| 652 |
|
| 653 |
function indexOfHighlight(s) |
| 654 |
{ |
| 655 |
for (var i = 0; i < highlights.length; ++i) |
| 656 |
{ |
| 657 |
var h = highlights[i]; |
| 658 |
if (h.series == s) |
| 659 |
return i; |
| 660 |
} |
| 661 |
return -1; |
| 662 |
} |
| 663 |
|
| 664 |
function drawOverlay(plot, octx) |
| 665 |
{ |
| 666 |
//alert(options.series.pie.radius); |
| 667 |
var options = plot.getOptions(); |
| 668 |
//alert(options.series.pie.radius); |
| 669 |
|
| 670 |
var radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius; |
| 671 |
|
| 672 |
octx.save(); |
| 673 |
octx.translate(centerLeft, centerTop); |
| 674 |
octx.scale(1, options.series.pie.tilt); |
| 675 |
|
| 676 |
for (i = 0; i < highlights.length; ++i) |
| 677 |
drawHighlight(highlights[i].series); |
| 678 |
|
| 679 |
drawDonutHole(octx); |
| 680 |
|
| 681 |
octx.restore(); |
| 682 |
|
| 683 |
function drawHighlight(series) |
| 684 |
{ |
| 685 |
if (series.angle < 0) return; |
| 686 |
|
| 687 |
//octx.fillStyle = parseColor(options.series.pie.highlight.color).scale(null, null, null, options.series.pie.highlight.opacity).toString(); |
| 688 |
octx.fillStyle = "rgba(255, 255, 255, "+options.series.pie.highlight.opacity+")"; // this is temporary until we have access to parseColor |
| 689 |
|
| 690 |
octx.beginPath(); |
| 691 |
if (Math.abs(series.angle - Math.PI*2) > 0.000000001) |
| 692 |
octx.moveTo(0,0); // Center of the pie |
| 693 |
octx.arc(0,0,radius,series.startAngle,series.startAngle+series.angle,false); |
| 694 |
octx.closePath(); |
| 695 |
octx.fill(); |
| 696 |
} |
| 697 |
|
| 698 |
} |
| 699 |
|
| 700 |
} // end init (plugin body) |
| 701 |
|
| 702 |
// define pie specific options and their default values |
| 703 |
var options = { |
| 704 |
series: { |
| 705 |
pie: { |
| 706 |
show: false, |
| 707 |
radius: 'auto', // actual radius of the visible pie (based on full calculated radius if <=1, or hard pixel value) |
| 708 |
innerRadius:0, /* for donut */ |
| 709 |
startAngle: 3/2, |
| 710 |
tilt: 1, |
| 711 |
offset: { |
| 712 |
top: 0, |
| 713 |
left: 'auto' |
| 714 |
}, |
| 715 |
stroke: { |
| 716 |
color: '#FFF', |
| 717 |
width: 1 |
| 718 |
}, |
| 719 |
label: { |
| 720 |
show: 'auto', |
| 721 |
formatter: function(label, slice){ |
| 722 |
return '<div style="font-size:x-small;text-align:center;padding:2px;color:'+slice.color+';">'+label+'<br/>'+Math.round(slice.percent)+'%</div>'; |
| 723 |
}, // formatter function |
| 724 |
radius: 1, // radius at which to place the labels (based on full calculated radius if <=1, or hard pixel value) |
| 725 |
background: { |
| 726 |
color: null, |
| 727 |
opacity: 0 |
| 728 |
}, |
| 729 |
threshold: 0 // percentage at which to hide the label (i.e. the slice is too narrow) |
| 730 |
}, |
| 731 |
combine: { |
| 732 |
threshold: -1, // percentage at which to combine little slices into one larger slice |
| 733 |
color: null, // color to give the new slice (auto-generated if null) |
| 734 |
label: 'Other' // label to give the new slice |
| 735 |
}, |
| 736 |
highlight: { |
| 737 |
//color: '#FFF', // will add this functionality once parseColor is available |
| 738 |
opacity: 0.5 |
| 739 |
} |
| 740 |
} |
| 741 |
} |
| 742 |
}; |
| 743 |
|
| 744 |
$.plot.plugins.push({ |
| 745 |
init: init, |
| 746 |
options: options, |
| 747 |
name: "pie", |
| 748 |
version: "1.0" |
| 749 |
}); |
| 750 |
})(jQuery); |
| 751 |
|
