821 lines
		
	
	
		
			23 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
			
		
		
	
	
			821 lines
		
	
	
		
			23 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
/* Flot plugin for rendering pie charts.
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Copyright (c) 2007-2014 IOLA and Ole Laursen.
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Licensed under the MIT license.
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The plugin assumes that each series has a single data value, and that each
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value is a positive integer or zero.  Negative numbers don't make sense for a
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pie chart, and have unpredictable results.  The values do NOT need to be
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passed in as percentages; the plugin will calculate the total and per-slice
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percentages internally.
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* Created by Brian Medendorp
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* Updated with contributions from btburnett3, Anthony Aragues and Xavi Ivars
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The plugin supports these options:
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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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More detail and specific examples can be found in the included HTML file.
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*/
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(function($) {
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	// Maximum redraw attempts when fitting labels within the plot
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	var REDRAW_ATTEMPTS = 10;
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	// Factor by which to shrink the pie when fitting labels within the plot
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	var REDRAW_SHRINK = 0.95;
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	function init(plot) {
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		var canvas = null,
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			target = null,
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			options = null,
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			maxRadius = null,
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			centerLeft = null,
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			centerTop = null,
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			processed = false,
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			ctx = null;
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		// interactive variables
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		var highlights = [];
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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(function(plot, options) {
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			if (options.series.pie.show) {
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				options.grid.show = false;
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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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				}
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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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				}
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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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				} else if (options.series.pie.tilt < 0) {
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					options.series.pie.tilt = 0;
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				}
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			}
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		});
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		plot.hooks.bindEvents.push(function(plot, eventHolder) {
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			var options = plot.getOptions();
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			if (options.series.pie.show) {
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				if (options.grid.hoverable) {
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					eventHolder.unbind("mousemove").mousemove(onMouseMove);
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				}
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				if (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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		plot.hooks.processDatapoints.push(function(plot, series, data, datapoints) {
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			var options = plot.getOptions();
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			if (options.series.pie.show) {
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				processDatapoints(plot, series, data, datapoints);
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			}
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		});
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		plot.hooks.drawOverlay.push(function(plot, octx) {
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			var options = plot.getOptions();
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			if (options.series.pie.show) {
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				drawOverlay(plot, octx);
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			}
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		});
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		plot.hooks.draw.push(function(plot, newCtx) {
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			var options = plot.getOptions();
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			if (options.series.pie.show) {
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				draw(plot, newCtx);
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			}
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		});
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		function processDatapoints(plot, series, datapoints) {
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			if (!processed)	{
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				processed = true;
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				canvas = plot.getCanvas();
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				target = $(canvas).parent();
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				options = plot.getOptions();
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				plot.setData(combine(plot.getData()));
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			}
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		}
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		function combine(data) {
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			var total = 0,
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				combined = 0,
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				numCombined = 0,
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				color = options.series.pie.combine.color,
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				newdata = [];
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			// Fix up the raw data from Flot, ensuring the data is numeric
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			for (var i = 0; i < data.length; ++i) {
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				var value = data[i].data;
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				// If the data is an array, we'll assume that it's a standard
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				// Flot x-y pair, and are concerned only with the second value.
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				// Note how we use the original array, rather than creating a
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				// new one; this is more efficient and preserves any extra data
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				// that the user may have stored in higher indexes.
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				if ($.isArray(value) && value.length == 1) {
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    				value = value[0];
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				}
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				if ($.isArray(value)) {
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					// Equivalent to $.isNumeric() but compatible with jQuery < 1.7
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					if (!isNaN(parseFloat(value[1])) && isFinite(value[1])) {
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						value[1] = +value[1];
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					} else {
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						value[1] = 0;
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					}
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				} else if (!isNaN(parseFloat(value)) && isFinite(value)) {
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					value = [1, +value];
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				} else {
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					value = [1, 0];
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				}
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				data[i].data = [value];
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			}
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			// Sum up all the slices, so we can calculate percentages for each
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			for (var i = 0; i < data.length; ++i) {
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				total += data[i].data[0][1];
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			}
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			// Count the number of slices with percentages below the combine
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			// threshold; if it turns out to be just one, we won't combine.
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			for (var i = 0; i < data.length; ++i) {
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				var value = data[i].data[0][1];
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				if (value / total <= options.series.pie.combine.threshold) {
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					combined += value;
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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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				}
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			}
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			for (var i = 0; i < data.length; ++i) {
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				var value = data[i].data[0][1];
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				if (numCombined < 2 || value / total > options.series.pie.combine.threshold) {
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					newdata.push(
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						$.extend(data[i], {     /* extend to allow keeping all other original data values
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						                           and using them e.g. in labelFormatter. */
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							data: [[1, value]],
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							color: data[i].color,
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							label: data[i].label,
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							angle: value * Math.PI * 2 / total,
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							percent: value / (total / 100)
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						})
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					);
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				}
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			}
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			if (numCombined > 1) {
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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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			}
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			return newdata;
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		}
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		function draw(plot, newCtx) {
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			if (!target) {
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				return; // if no series were passed
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			}
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			var canvasWidth = plot.getPlaceholder().width(),
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				canvasHeight = plot.getPlaceholder().height(),
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				legendWidth = target.children().filter(".legend").children().width() || 0;
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			ctx = newCtx;
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			// WARNING: HACK! REWRITE THIS CODE AS SOON AS POSSIBLE!
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			// When combining smaller slices into an 'other' slice, we need to
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			// add a new series.  Since Flot gives plugins no way to modify the
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			// list of series, the pie plugin uses a hack where the first call
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			// to processDatapoints results in a call to setData with the new
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			// list of series, then subsequent processDatapoints do nothing.
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			// The plugin-global 'processed' flag is used to control this hack;
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			// it starts out false, and is set to true after the first call to
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			// processDatapoints.
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			// Unfortunately this turns future setData calls into no-ops; they
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			// call processDatapoints, the flag is true, and nothing happens.
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			// To fix this we'll set the flag back to false here in draw, when
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			// all series have been processed, so the next sequence of calls to
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			// processDatapoints once again starts out with a slice-combine.
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			// This is really a hack; in 0.9 we need to give plugins a proper
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			// way to modify series before any processing begins.
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			processed = false;
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			// calculate maximum radius and center point
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			maxRadius =  Math.min(canvasWidth, canvasHeight / options.series.pie.tilt) / 2;
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			centerTop = canvasHeight / 2 + options.series.pie.offset.top;
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			centerLeft = canvasWidth / 2;
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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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				}
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				if (centerLeft < maxRadius) {
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					centerLeft = maxRadius;
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				} else if (centerLeft > canvasWidth - maxRadius) {
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					centerLeft = canvasWidth - maxRadius;
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				}
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			} else {
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				centerLeft += options.series.pie.offset.left;
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			}
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			var slices = plot.getData(),
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				attempts = 0;
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			// Keep shrinking the pie's radius until drawPie returns true,
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			// indicating that all the labels fit, or we try too many times.
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			do {
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				if (attempts > 0) {
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					maxRadius *= REDRAW_SHRINK;
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				}
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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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				}
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			} while (!drawPie() && attempts < REDRAW_ATTEMPTS)
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			if (attempts >= REDRAW_ATTEMPTS) {
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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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			if (plot.setSeries && plot.insertLegend) {
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				plot.setSeries(slices);
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				plot.insertLegend();
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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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			function clear() {
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				ctx.clearRect(0, 0, canvasWidth, canvasHeight);
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				target.children().filter(".pieLabel, .pieLabelBackground").remove();
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			}
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			function drawShadow() {
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				var shadowLeft = options.series.pie.shadow.left;
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				var shadowTop = options.series.pie.shadow.top;
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				var edge = 10;
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				var alpha = options.series.pie.shadow.alpha;
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				var radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius;
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				if (radius >= canvasWidth / 2 - shadowLeft || radius * options.series.pie.tilt >= canvasHeight / 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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				// 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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				//radius -= edge;
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				for (var i = 1; i <= edge; i++) {
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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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				ctx.restore();
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			}
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			function drawPie() {
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				var startAngle = Math.PI * options.series.pie.startAngle;
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				var radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius;
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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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				// 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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					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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				// draw slice outlines
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				if (options.series.pie.stroke.width > 0) {
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					ctx.save();
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					ctx.lineWidth = options.series.pie.stroke.width;
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					currentAngle = startAngle;
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					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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					}
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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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				ctx.restore();
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				// Draw the labels, returning true if they fit within the plot
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				if (options.series.pie.label.show) {
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					return drawLabels();
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				} else return true;
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				function drawSlice(angle, color, fill) {
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					if (angle <= 0 || isNaN(angle)) {
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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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						ctx.strokeStyle = color;
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						ctx.lineJoin = "round";
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					}
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					ctx.beginPath();
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					if (Math.abs(angle - Math.PI * 2) > 0.000000001) {
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						ctx.moveTo(0, 0); // Center of the pie
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					}
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					//ctx.arc(0, 0, radius, 0, angle, false); // This doesn't work properly in Opera
 | 
						|
					ctx.arc(0, 0, radius,currentAngle, currentAngle + angle / 2, false);
 | 
						|
					ctx.arc(0, 0, radius,currentAngle + angle / 2, currentAngle + angle, false);
 | 
						|
					ctx.closePath();
 | 
						|
					//ctx.rotate(angle); // This doesn't work properly in Opera
 | 
						|
					currentAngle += angle;
 | 
						|
 | 
						|
					if (fill) {
 | 
						|
						ctx.fill();
 | 
						|
					} else {
 | 
						|
						ctx.stroke();
 | 
						|
					}
 | 
						|
				}
 | 
						|
 | 
						|
				function drawLabels() {
 | 
						|
 | 
						|
					var currentAngle = startAngle;
 | 
						|
					var radius = options.series.pie.label.radius > 1 ? options.series.pie.label.radius : maxRadius * options.series.pie.label.radius;
 | 
						|
 | 
						|
					for (var i = 0; i < slices.length; ++i) {
 | 
						|
						if (slices[i].percent >= options.series.pie.label.threshold * 100) {
 | 
						|
							if (!drawLabel(slices[i], currentAngle, i)) {
 | 
						|
								return false;
 | 
						|
							}
 | 
						|
						}
 | 
						|
						currentAngle += slices[i].angle;
 | 
						|
					}
 | 
						|
 | 
						|
					return true;
 | 
						|
 | 
						|
					function drawLabel(slice, startAngle, index) {
 | 
						|
 | 
						|
						if (slice.data[0][1] == 0) {
 | 
						|
							return true;
 | 
						|
						}
 | 
						|
 | 
						|
						// format label text
 | 
						|
 | 
						|
						var lf = options.legend.labelFormatter, text, plf = options.series.pie.label.formatter;
 | 
						|
 | 
						|
						if (lf) {
 | 
						|
							text = lf(slice.label, slice);
 | 
						|
						} else {
 | 
						|
							text = slice.label;
 | 
						|
						}
 | 
						|
 | 
						|
						if (plf) {
 | 
						|
							text = plf(text, slice);
 | 
						|
						}
 | 
						|
 | 
						|
						var halfAngle = ((startAngle + slice.angle) + startAngle) / 2;
 | 
						|
						var x = centerLeft + Math.round(Math.cos(halfAngle) * radius);
 | 
						|
						var y = centerTop + Math.round(Math.sin(halfAngle) * radius) * options.series.pie.tilt;
 | 
						|
 | 
						|
						var html = "<span class='pieLabel' id='pieLabel" + index + "' style='position:absolute;top:" + y + "px;left:" + x + "px;'>" + text + "</span>";
 | 
						|
						target.append(html);
 | 
						|
 | 
						|
						var label = target.children("#pieLabel" + index);
 | 
						|
						var labelTop = (y - label.height() / 2);
 | 
						|
						var labelLeft = (x - label.width() / 2);
 | 
						|
 | 
						|
						label.css("top", labelTop);
 | 
						|
						label.css("left", labelLeft);
 | 
						|
 | 
						|
						// check to make sure that the label is not outside the canvas
 | 
						|
 | 
						|
						if (0 - labelTop > 0 || 0 - labelLeft > 0 || canvasHeight - (labelTop + label.height()) < 0 || canvasWidth - (labelLeft + label.width()) < 0) {
 | 
						|
							return false;
 | 
						|
						}
 | 
						|
 | 
						|
						if (options.series.pie.label.background.opacity != 0) {
 | 
						|
 | 
						|
							// put in the transparent background separately to avoid blended labels and label boxes
 | 
						|
 | 
						|
							var c = options.series.pie.label.background.color;
 | 
						|
 | 
						|
							if (c == null) {
 | 
						|
								c = slice.color;
 | 
						|
							}
 | 
						|
 | 
						|
							var pos = "top:" + labelTop + "px;left:" + labelLeft + "px;";
 | 
						|
							$("<div class='pieLabelBackground' style='position:absolute;width:" + label.width() + "px;height:" + label.height() + "px;" + pos + "background-color:" + c + ";'></div>")
 | 
						|
								.css("opacity", options.series.pie.label.background.opacity)
 | 
						|
								.insertBefore(label);
 | 
						|
						}
 | 
						|
 | 
						|
						return true;
 | 
						|
					} // end individual label function
 | 
						|
				} // end drawLabels function
 | 
						|
			} // end drawPie function
 | 
						|
		} // end draw function
 | 
						|
 | 
						|
		// Placed here because it needs to be accessed from multiple locations
 | 
						|
 | 
						|
		function drawDonutHole(layer) {
 | 
						|
			if (options.series.pie.innerRadius > 0) {
 | 
						|
 | 
						|
				// subtract the center
 | 
						|
 | 
						|
				layer.save();
 | 
						|
				var innerRadius = options.series.pie.innerRadius > 1 ? options.series.pie.innerRadius : maxRadius * options.series.pie.innerRadius;
 | 
						|
				layer.globalCompositeOperation = "destination-out"; // this does not work with excanvas, but it will fall back to using the stroke color
 | 
						|
				layer.beginPath();
 | 
						|
				layer.fillStyle = options.series.pie.stroke.color;
 | 
						|
				layer.arc(0, 0, innerRadius, 0, Math.PI * 2, false);
 | 
						|
				layer.fill();
 | 
						|
				layer.closePath();
 | 
						|
				layer.restore();
 | 
						|
 | 
						|
				// add inner stroke
 | 
						|
 | 
						|
				layer.save();
 | 
						|
				layer.beginPath();
 | 
						|
				layer.strokeStyle = options.series.pie.stroke.color;
 | 
						|
				layer.arc(0, 0, innerRadius, 0, Math.PI * 2, false);
 | 
						|
				layer.stroke();
 | 
						|
				layer.closePath();
 | 
						|
				layer.restore();
 | 
						|
 | 
						|
				// TODO: add extra shadow inside hole (with a mask) if the pie is tilted.
 | 
						|
			}
 | 
						|
		}
 | 
						|
 | 
						|
		//-- Additional Interactive related functions --
 | 
						|
 | 
						|
		function isPointInPoly(poly, pt) {
 | 
						|
			for(var c = false, i = -1, l = poly.length, j = l - 1; ++i < l; j = i)
 | 
						|
				((poly[i][1] <= pt[1] && pt[1] < poly[j][1]) || (poly[j][1] <= pt[1] && pt[1]< poly[i][1]))
 | 
						|
				&& (pt[0] < (poly[j][0] - poly[i][0]) * (pt[1] - poly[i][1]) / (poly[j][1] - poly[i][1]) + poly[i][0])
 | 
						|
				&& (c = !c);
 | 
						|
			return c;
 | 
						|
		}
 | 
						|
 | 
						|
		function findNearbySlice(mouseX, mouseY) {
 | 
						|
 | 
						|
			var slices = plot.getData(),
 | 
						|
				options = plot.getOptions(),
 | 
						|
				radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius,
 | 
						|
				x, y;
 | 
						|
 | 
						|
			for (var i = 0; i < slices.length; ++i) {
 | 
						|
 | 
						|
				var s = slices[i];
 | 
						|
 | 
						|
				if (s.pie.show) {
 | 
						|
 | 
						|
					ctx.save();
 | 
						|
					ctx.beginPath();
 | 
						|
					ctx.moveTo(0, 0); // Center of the pie
 | 
						|
					//ctx.scale(1, options.series.pie.tilt);	// this actually seems to break everything when here.
 | 
						|
					ctx.arc(0, 0, radius, s.startAngle, s.startAngle + s.angle / 2, false);
 | 
						|
					ctx.arc(0, 0, radius, s.startAngle + s.angle / 2, s.startAngle + s.angle, false);
 | 
						|
					ctx.closePath();
 | 
						|
					x = mouseX - centerLeft;
 | 
						|
					y = mouseY - centerTop;
 | 
						|
 | 
						|
					if (ctx.isPointInPath) {
 | 
						|
						if (ctx.isPointInPath(mouseX - centerLeft, mouseY - centerTop)) {
 | 
						|
							ctx.restore();
 | 
						|
							return {
 | 
						|
								datapoint: [s.percent, s.data],
 | 
						|
								dataIndex: 0,
 | 
						|
								series: s,
 | 
						|
								seriesIndex: i
 | 
						|
							};
 | 
						|
						}
 | 
						|
					} else {
 | 
						|
 | 
						|
						// excanvas for IE doesn;t support isPointInPath, this is a workaround.
 | 
						|
 | 
						|
						var p1X = radius * Math.cos(s.startAngle),
 | 
						|
							p1Y = radius * Math.sin(s.startAngle),
 | 
						|
							p2X = radius * Math.cos(s.startAngle + s.angle / 4),
 | 
						|
							p2Y = radius * Math.sin(s.startAngle + s.angle / 4),
 | 
						|
							p3X = radius * Math.cos(s.startAngle + s.angle / 2),
 | 
						|
							p3Y = radius * Math.sin(s.startAngle + s.angle / 2),
 | 
						|
							p4X = radius * Math.cos(s.startAngle + s.angle / 1.5),
 | 
						|
							p4Y = radius * Math.sin(s.startAngle + s.angle / 1.5),
 | 
						|
							p5X = radius * Math.cos(s.startAngle + s.angle),
 | 
						|
							p5Y = radius * Math.sin(s.startAngle + s.angle),
 | 
						|
							arrPoly = [[0, 0], [p1X, p1Y], [p2X, p2Y], [p3X, p3Y], [p4X, p4Y], [p5X, p5Y]],
 | 
						|
							arrPoint = [x, y];
 | 
						|
 | 
						|
						// TODO: perhaps do some mathmatical trickery here with the Y-coordinate to compensate for pie tilt?
 | 
						|
 | 
						|
						if (isPointInPoly(arrPoly, arrPoint)) {
 | 
						|
							ctx.restore();
 | 
						|
							return {
 | 
						|
								datapoint: [s.percent, s.data],
 | 
						|
								dataIndex: 0,
 | 
						|
								series: s,
 | 
						|
								seriesIndex: i
 | 
						|
							};
 | 
						|
						}
 | 
						|
					}
 | 
						|
 | 
						|
					ctx.restore();
 | 
						|
				}
 | 
						|
			}
 | 
						|
 | 
						|
			return null;
 | 
						|
		}
 | 
						|
 | 
						|
		function onMouseMove(e) {
 | 
						|
			triggerClickHoverEvent("plothover", e);
 | 
						|
		}
 | 
						|
 | 
						|
		function onClick(e) {
 | 
						|
			triggerClickHoverEvent("plotclick", e);
 | 
						|
		}
 | 
						|
 | 
						|
		// trigger click or hover event (they send the same parameters so we share their code)
 | 
						|
 | 
						|
		function triggerClickHoverEvent(eventname, e) {
 | 
						|
 | 
						|
			var offset = plot.offset();
 | 
						|
			var canvasX = parseInt(e.pageX - offset.left);
 | 
						|
			var canvasY =  parseInt(e.pageY - offset.top);
 | 
						|
			var item = findNearbySlice(canvasX, canvasY);
 | 
						|
 | 
						|
			if (options.grid.autoHighlight) {
 | 
						|
 | 
						|
				// clear auto-highlights
 | 
						|
 | 
						|
				for (var i = 0; i < highlights.length; ++i) {
 | 
						|
					var h = highlights[i];
 | 
						|
					if (h.auto == eventname && !(item && h.series == item.series)) {
 | 
						|
						unhighlight(h.series);
 | 
						|
					}
 | 
						|
				}
 | 
						|
			}
 | 
						|
 | 
						|
			// highlight the slice
 | 
						|
 | 
						|
			if (item) {
 | 
						|
				highlight(item.series, eventname);
 | 
						|
			}
 | 
						|
 | 
						|
			// trigger any hover bind events
 | 
						|
 | 
						|
			var pos = { pageX: e.pageX, pageY: e.pageY };
 | 
						|
			target.trigger(eventname, [pos, item]);
 | 
						|
		}
 | 
						|
 | 
						|
		function highlight(s, auto) {
 | 
						|
			//if (typeof s == "number") {
 | 
						|
			//	s = series[s];
 | 
						|
			//}
 | 
						|
 | 
						|
			var i = indexOfHighlight(s);
 | 
						|
 | 
						|
			if (i == -1) {
 | 
						|
				highlights.push({ series: s, auto: auto });
 | 
						|
				plot.triggerRedrawOverlay();
 | 
						|
			} else if (!auto) {
 | 
						|
				highlights[i].auto = false;
 | 
						|
			}
 | 
						|
		}
 | 
						|
 | 
						|
		function unhighlight(s) {
 | 
						|
			if (s == null) {
 | 
						|
				highlights = [];
 | 
						|
				plot.triggerRedrawOverlay();
 | 
						|
			}
 | 
						|
 | 
						|
			//if (typeof s == "number") {
 | 
						|
			//	s = series[s];
 | 
						|
			//}
 | 
						|
 | 
						|
			var i = indexOfHighlight(s);
 | 
						|
 | 
						|
			if (i != -1) {
 | 
						|
				highlights.splice(i, 1);
 | 
						|
				plot.triggerRedrawOverlay();
 | 
						|
			}
 | 
						|
		}
 | 
						|
 | 
						|
		function indexOfHighlight(s) {
 | 
						|
			for (var i = 0; i < highlights.length; ++i) {
 | 
						|
				var h = highlights[i];
 | 
						|
				if (h.series == s)
 | 
						|
					return i;
 | 
						|
			}
 | 
						|
			return -1;
 | 
						|
		}
 | 
						|
 | 
						|
		function drawOverlay(plot, octx) {
 | 
						|
 | 
						|
			var options = plot.getOptions();
 | 
						|
 | 
						|
			var radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius;
 | 
						|
 | 
						|
			octx.save();
 | 
						|
			octx.translate(centerLeft, centerTop);
 | 
						|
			octx.scale(1, options.series.pie.tilt);
 | 
						|
 | 
						|
			for (var i = 0; i < highlights.length; ++i) {
 | 
						|
				drawHighlight(highlights[i].series);
 | 
						|
			}
 | 
						|
 | 
						|
			drawDonutHole(octx);
 | 
						|
 | 
						|
			octx.restore();
 | 
						|
 | 
						|
			function drawHighlight(series) {
 | 
						|
 | 
						|
				if (series.angle <= 0 || isNaN(series.angle)) {
 | 
						|
					return;
 | 
						|
				}
 | 
						|
 | 
						|
				//octx.fillStyle = parseColor(options.series.pie.highlight.color).scale(null, null, null, options.series.pie.highlight.opacity).toString();
 | 
						|
				octx.fillStyle = "rgba(255, 255, 255, " + options.series.pie.highlight.opacity + ")"; // this is temporary until we have access to parseColor
 | 
						|
				octx.beginPath();
 | 
						|
				if (Math.abs(series.angle - Math.PI * 2) > 0.000000001) {
 | 
						|
					octx.moveTo(0, 0); // Center of the pie
 | 
						|
				}
 | 
						|
				octx.arc(0, 0, radius, series.startAngle, series.startAngle + series.angle / 2, false);
 | 
						|
				octx.arc(0, 0, radius, series.startAngle + series.angle / 2, series.startAngle + series.angle, false);
 | 
						|
				octx.closePath();
 | 
						|
				octx.fill();
 | 
						|
			}
 | 
						|
		}
 | 
						|
	} // end init (plugin body)
 | 
						|
 | 
						|
	// define pie specific options and their default values
 | 
						|
 | 
						|
	var options = {
 | 
						|
		series: {
 | 
						|
			pie: {
 | 
						|
				show: false,
 | 
						|
				radius: "auto",	// actual radius of the visible pie (based on full calculated radius if <=1, or hard pixel value)
 | 
						|
				innerRadius: 0, /* for donut */
 | 
						|
				startAngle: 3/2,
 | 
						|
				tilt: 1,
 | 
						|
				shadow: {
 | 
						|
					left: 5,	// shadow left offset
 | 
						|
					top: 15,	// shadow top offset
 | 
						|
					alpha: 0.02	// shadow alpha
 | 
						|
				},
 | 
						|
				offset: {
 | 
						|
					top: 0,
 | 
						|
					left: "auto"
 | 
						|
				},
 | 
						|
				stroke: {
 | 
						|
					color: "#fff",
 | 
						|
					width: 1
 | 
						|
				},
 | 
						|
				label: {
 | 
						|
					show: "auto",
 | 
						|
					formatter: function(label, slice) {
 | 
						|
						return "<div style='font-size:x-small;text-align:center;padding:2px;color:" + slice.color + ";'>" + label + "<br/>" + Math.round(slice.percent) + "%</div>";
 | 
						|
					},	// formatter function
 | 
						|
					radius: 1,	// radius at which to place the labels (based on full calculated radius if <=1, or hard pixel value)
 | 
						|
					background: {
 | 
						|
						color: null,
 | 
						|
						opacity: 0
 | 
						|
					},
 | 
						|
					threshold: 0	// percentage at which to hide the label (i.e. the slice is too narrow)
 | 
						|
				},
 | 
						|
				combine: {
 | 
						|
					threshold: -1,	// percentage at which to combine little slices into one larger slice
 | 
						|
					color: null,	// color to give the new slice (auto-generated if null)
 | 
						|
					label: "Other"	// label to give the new slice
 | 
						|
				},
 | 
						|
				highlight: {
 | 
						|
					//color: "#fff",		// will add this functionality once parseColor is available
 | 
						|
					opacity: 0.5
 | 
						|
				}
 | 
						|
			}
 | 
						|
		}
 | 
						|
	};
 | 
						|
 | 
						|
	$.plot.plugins.push({
 | 
						|
		init: init,
 | 
						|
		options: options,
 | 
						|
		name: "pie",
 | 
						|
		version: "1.1"
 | 
						|
	});
 | 
						|
 | 
						|
})(jQuery);
 |