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/* Flot plugin for rendering pie charts. |
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|
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Copyright (c) 2007-2013 IOLA and Ole Laursen. |
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Licensed under the MIT license. |
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|
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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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|
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* Created by Brian Medendorp |
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|
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* Updated with contributions from btburnett3, Anthony Aragues and Xavi Ivars |
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|
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The plugin supports these options: |
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|
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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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// Maximum redraw attempts when fitting labels within the plot |
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|
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var REDRAW_ATTEMPTS = 10; |
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|
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// Factor by which to shrink the pie when fitting labels within the plot |
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|
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var REDRAW_SHRINK = 0.95; |
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|
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function init(plot) { |
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|
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var canvas = null, |
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target = 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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|
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// interactive variables |
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|
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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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|
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plot.hooks.processOptions.push(function(plot, options) { |
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if (options.series.pie.show) { |
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|
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options.grid.show = false; |
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|
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// set labels.show |
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|
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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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|
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// set radius |
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|
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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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|
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// ensure sane tilt |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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function combine(data) { |
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|
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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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|
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// Fix up the raw data from Flot, ensuring the data is numeric |
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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 value = data[i].data; |
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|
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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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|
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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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|
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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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|
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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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|
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data[i].data = [value]; |
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} |
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|
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// Sum up all the slices, so we can calculate percentages for each |
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|
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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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|
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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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|
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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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|
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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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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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|
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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) { |
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return; // if no series were passed |
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} |
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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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|
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ctx = newCtx; |
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|
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// WARNING: HACK! REWRITE THIS CODE AS SOON AS POSSIBLE! |
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|
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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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|
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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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|
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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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|
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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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|
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processed = false; |
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|
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// calculate maximum radius and center point |
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|
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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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|
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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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} else { |
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centerLeft += options.series.pie.offset.left; |
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} |
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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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|
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var slices = plot.getData(), |
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attempts = 0; |
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|
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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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|
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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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|
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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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|
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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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|
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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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ctx.clearRect(0, 0, canvasWidth, canvasHeight); |
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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 = 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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|
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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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|
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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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|
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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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|
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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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|
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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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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; |
| 378 |
|
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// center and rotate to starting position |
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|
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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 |
| 385 |
|
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// draw slices |
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|
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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); |
| 393 |
} |
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ctx.restore(); |
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|
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// draw slice outlines |
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|
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if (options.series.pie.stroke.width > 0) { |
| 399 |
ctx.save(); |
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ctx.lineWidth = options.series.pie.stroke.width; |
| 401 |
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); |
| 404 |
} |
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ctx.restore(); |
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} |
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|
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// draw donut hole |
| 409 |
|
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drawDonutHole(ctx); |
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|
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ctx.restore(); |
| 413 |
|
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// Draw the labels, returning true if they fit within the plot |
| 415 |
|
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if (options.series.pie.label.show) { |
| 417 |
return drawLabels(); |
| 418 |
} else return true; |
| 419 |
|
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function drawSlice(angle, color, fill) { |
| 421 |
|
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if (angle <= 0 || isNaN(angle)) { |
| 423 |
return; |
| 424 |
} |
| 425 |
|
| 426 |
if (fill) { |
| 427 |
ctx.fillStyle = color; |
| 428 |
} else { |
| 429 |
ctx.strokeStyle = color; |
| 430 |
ctx.lineJoin = "round"; |
| 431 |
} |
| 432 |
|
| 433 |
ctx.beginPath(); |
| 434 |
if (Math.abs(angle - Math.PI * 2) > 0.000000001) { |
| 435 |
ctx.moveTo(0, 0); // Center of the pie |
| 436 |
} |
| 437 |
|
| 438 |
//ctx.arc(0, 0, radius, 0, angle, false); // This doesn't work properly in Opera |
| 439 |
ctx.arc(0, 0, radius,currentAngle, currentAngle + angle / 2, false); |
| 440 |
ctx.arc(0, 0, radius,currentAngle + angle / 2, currentAngle + angle, false); |
| 441 |
ctx.closePath(); |
| 442 |
//ctx.rotate(angle); // This doesn't work properly in Opera |
| 443 |
currentAngle += angle; |
| 444 |
|
| 445 |
if (fill) { |
| 446 |
ctx.fill(); |
| 447 |
} else { |
| 448 |
ctx.stroke(); |
| 449 |
} |
| 450 |
} |
| 451 |
|
| 452 |
function drawLabels() { |
| 453 |
|
| 454 |
var currentAngle = startAngle; |
| 455 |
var radius = options.series.pie.label.radius > 1 ? options.series.pie.label.radius : maxRadius * options.series.pie.label.radius; |
| 456 |
|
| 457 |
for (var i = 0; i < slices.length; ++i) { |
| 458 |
if (slices[i].percent >= options.series.pie.label.threshold * 100) { |
| 459 |
if (!drawLabel(slices[i], currentAngle, i)) { |
| 460 |
return false; |
| 461 |
} |
| 462 |
} |
| 463 |
currentAngle += slices[i].angle; |
| 464 |
} |
| 465 |
|
| 466 |
return true; |
| 467 |
|
| 468 |
function drawLabel(slice, startAngle, index) { |
| 469 |
|
| 470 |
if (slice.data[0][1] == 0) { |
| 471 |
return true; |
| 472 |
} |
| 473 |
|
| 474 |
// format label text |
| 475 |
|
| 476 |
var lf = options.legend.labelFormatter, text, plf = options.series.pie.label.formatter; |
| 477 |
|
| 478 |
if (lf) { |
| 479 |
text = lf(slice.label, slice); |
| 480 |
} else { |
| 481 |
text = slice.label; |
| 482 |
} |
| 483 |
|
| 484 |
if (plf) { |
| 485 |
text = plf(text, slice); |
| 486 |
} |
| 487 |
|
| 488 |
var halfAngle = ((startAngle + slice.angle) + startAngle) / 2; |
| 489 |
var x = centerLeft + Math.round(Math.cos(halfAngle) * radius); |
| 490 |
var y = centerTop + Math.round(Math.sin(halfAngle) * radius) * options.series.pie.tilt; |
| 491 |
|
| 492 |
var html = "<span class='pieLabel' id='pieLabel" + index + "' style='position:absolute;top:" + y + "px;left:" + x + "px;'>" + text + "</span>"; |
| 493 |
target.append(html); |
| 494 |
|
| 495 |
var label = target.children("#pieLabel" + index); |
| 496 |
var labelTop = (y - label.height() / 2); |
| 497 |
var labelLeft = (x - label.width() / 2); |
| 498 |
|
| 499 |
label.css("top", labelTop); |
| 500 |
label.css("left", labelLeft); |
| 501 |
|
| 502 |
// check to make sure that the label is not outside the canvas |
| 503 |
|
| 504 |
if (0 - labelTop > 0 || 0 - labelLeft > 0 || canvasHeight - (labelTop + label.height()) < 0 || canvasWidth - (labelLeft + label.width()) < 0) { |
| 505 |
return false; |
| 506 |
} |
| 507 |
|
| 508 |
if (options.series.pie.label.background.opacity != 0) { |
| 509 |
|
| 510 |
// put in the transparent background separately to avoid blended labels and label boxes |
| 511 |
|
| 512 |
var c = options.series.pie.label.background.color; |
| 513 |
|
| 514 |
if (c == null) { |
| 515 |
c = slice.color; |
| 516 |
} |
| 517 |
|
| 518 |
var pos = "top:" + labelTop + "px;left:" + labelLeft + "px;"; |
| 519 |
$("<div class='pieLabelBackground' style='position:absolute;width:" + label.width() + "px;height:" + label.height() + "px;" + pos + "background-color:" + c + ";'></div>") |
| 520 |
.css("opacity", options.series.pie.label.background.opacity) |
| 521 |
.insertBefore(label); |
| 522 |
} |
| 523 |
|
| 524 |
return true; |
| 525 |
} // end individual label function |
| 526 |
} // end drawLabels function |
| 527 |
} // end drawPie function |
| 528 |
} // end draw function |
| 529 |
|
| 530 |
// Placed here because it needs to be accessed from multiple locations |
| 531 |
|
| 532 |
function drawDonutHole(layer) { |
| 533 |
if (options.series.pie.innerRadius > 0) { |
| 534 |
|
| 535 |
// subtract the center |
| 536 |
|
| 537 |
layer.save(); |
| 538 |
var innerRadius = options.series.pie.innerRadius > 1 ? options.series.pie.innerRadius : maxRadius * options.series.pie.innerRadius; |
| 539 |
layer.globalCompositeOperation = "destination-out"; // this does not work with excanvas, but it will fall back to using the stroke color |
| 540 |
layer.beginPath(); |
| 541 |
layer.fillStyle = options.series.pie.stroke.color; |
| 542 |
layer.arc(0, 0, innerRadius, 0, Math.PI * 2, false); |
| 543 |
layer.fill(); |
| 544 |
layer.closePath(); |
| 545 |
layer.restore(); |
| 546 |
|
| 547 |
// add inner stroke |
| 548 |
|
| 549 |
layer.save(); |
| 550 |
layer.beginPath(); |
| 551 |
layer.strokeStyle = options.series.pie.stroke.color; |
| 552 |
layer.arc(0, 0, innerRadius, 0, Math.PI * 2, false); |
| 553 |
layer.stroke(); |
| 554 |
layer.closePath(); |
| 555 |
layer.restore(); |
| 556 |
|
| 557 |
// TODO: add extra shadow inside hole (with a mask) if the pie is tilted. |
| 558 |
} |
| 559 |
} |
| 560 |
|
| 561 |
//-- Additional Interactive related functions -- |
| 562 |
|
| 563 |
function isPointInPoly(poly, pt) { |
| 564 |
for(var c = false, i = -1, l = poly.length, j = l - 1; ++i < l; j = i) |
| 565 |
((poly[i][1] <= pt[1] && pt[1] < poly[j][1]) || (poly[j][1] <= pt[1] && pt[1]< poly[i][1])) |
| 566 |
&& (pt[0] < (poly[j][0] - poly[i][0]) * (pt[1] - poly[i][1]) / (poly[j][1] - poly[i][1]) + poly[i][0]) |
| 567 |
&& (c = !c); |
| 568 |
return c; |
| 569 |
} |
| 570 |
|
| 571 |
function findNearbySlice(mouseX, mouseY) { |
| 572 |
|
| 573 |
var slices = plot.getData(), |
| 574 |
options = plot.getOptions(), |
| 575 |
radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius, |
| 576 |
x, y; |
| 577 |
|
| 578 |
for (var i = 0; i < slices.length; ++i) { |
| 579 |
|
| 580 |
var s = slices[i]; |
| 581 |
|
| 582 |
if (s.pie.show) { |
| 583 |
|
| 584 |
ctx.save(); |
| 585 |
ctx.beginPath(); |
| 586 |
ctx.moveTo(0, 0); // Center of the pie |
| 587 |
//ctx.scale(1, options.series.pie.tilt); // this actually seems to break everything when here. |
| 588 |
ctx.arc(0, 0, radius, s.startAngle, s.startAngle + s.angle / 2, false); |
| 589 |
ctx.arc(0, 0, radius, s.startAngle + s.angle / 2, s.startAngle + s.angle, false); |
| 590 |
ctx.closePath(); |
| 591 |
x = mouseX - centerLeft; |
| 592 |
y = mouseY - centerTop; |
| 593 |
|
| 594 |
if (ctx.isPointInPath) { |
| 595 |
if (ctx.isPointInPath(mouseX - centerLeft, mouseY - centerTop)) { |
| 596 |
ctx.restore(); |
| 597 |
return { |
| 598 |
datapoint: [s.percent, s.data], |
| 599 |
dataIndex: 0, |
| 600 |
series: s, |
| 601 |
seriesIndex: i |
| 602 |
}; |
| 603 |
} |
| 604 |
} else { |
| 605 |
|
| 606 |
// excanvas for IE doesn;t support isPointInPath, this is a workaround. |
| 607 |
|
| 608 |
var p1X = radius * Math.cos(s.startAngle), |
| 609 |
p1Y = radius * Math.sin(s.startAngle), |
| 610 |
p2X = radius * Math.cos(s.startAngle + s.angle / 4), |
| 611 |
p2Y = radius * Math.sin(s.startAngle + s.angle / 4), |
| 612 |
p3X = radius * Math.cos(s.startAngle + s.angle / 2), |
| 613 |
p3Y = radius * Math.sin(s.startAngle + s.angle / 2), |
| 614 |
p4X = radius * Math.cos(s.startAngle + s.angle / 1.5), |
| 615 |
p4Y = radius * Math.sin(s.startAngle + s.angle / 1.5), |
| 616 |
p5X = radius * Math.cos(s.startAngle + s.angle), |
| 617 |
p5Y = radius * Math.sin(s.startAngle + s.angle), |
| 618 |
arrPoly = [[0, 0], [p1X, p1Y], [p2X, p2Y], [p3X, p3Y], [p4X, p4Y], [p5X, p5Y]], |
| 619 |
arrPoint = [x, y]; |
| 620 |
|
| 621 |
// TODO: perhaps do some mathmatical trickery here with the Y-coordinate to compensate for pie tilt? |
| 622 |
|
| 623 |
if (isPointInPoly(arrPoly, arrPoint)) { |
| 624 |
ctx.restore(); |
| 625 |
return { |
| 626 |
datapoint: [s.percent, s.data], |
| 627 |
dataIndex: 0, |
| 628 |
series: s, |
| 629 |
seriesIndex: i |
| 630 |
}; |
| 631 |
} |
| 632 |
} |
| 633 |
|
| 634 |
ctx.restore(); |
| 635 |
} |
| 636 |
} |
| 637 |
|
| 638 |
return null; |
| 639 |
} |
| 640 |
|
| 641 |
function onMouseMove(e) { |
| 642 |
triggerClickHoverEvent("plothover", e); |
| 643 |
} |
| 644 |
|
| 645 |
function onClick(e) { |
| 646 |
triggerClickHoverEvent("plotclick", e); |
| 647 |
} |
| 648 |
|
| 649 |
// trigger click or hover event (they send the same parameters so we share their code) |
| 650 |
|
| 651 |
function triggerClickHoverEvent(eventname, e) { |
| 652 |
|
| 653 |
var offset = plot.offset(); |
| 654 |
var canvasX = parseInt(e.pageX - offset.left); |
| 655 |
var canvasY = parseInt(e.pageY - offset.top); |
| 656 |
var item = findNearbySlice(canvasX, canvasY); |
| 657 |
|
| 658 |
if (options.grid.autoHighlight) { |
| 659 |
|
| 660 |
// clear auto-highlights |
| 661 |
|
| 662 |
for (var i = 0; i < highlights.length; ++i) { |
| 663 |
var h = highlights[i]; |
| 664 |
if (h.auto == eventname && !(item && h.series == item.series)) { |
| 665 |
unhighlight(h.series); |
| 666 |
} |
| 667 |
} |
| 668 |
} |
| 669 |
|
| 670 |
// highlight the slice |
| 671 |
|
| 672 |
if (item) { |
| 673 |
highlight(item.series, eventname); |
| 674 |
} |
| 675 |
|
| 676 |
// trigger any hover bind events |
| 677 |
|
| 678 |
var pos = { pageX: e.pageX, pageY: e.pageY }; |
| 679 |
target.trigger(eventname, [pos, item]); |
| 680 |
} |
| 681 |
|
| 682 |
function highlight(s, auto) { |
| 683 |
//if (typeof s == "number") { |
| 684 |
// s = series[s]; |
| 685 |
//} |
| 686 |
|
| 687 |
var i = indexOfHighlight(s); |
| 688 |
|
| 689 |
if (i == -1) { |
| 690 |
highlights.push({ series: s, auto: auto }); |
| 691 |
plot.triggerRedrawOverlay(); |
| 692 |
} else if (!auto) { |
| 693 |
highlights[i].auto = false; |
| 694 |
} |
| 695 |
} |
| 696 |
|
| 697 |
function unhighlight(s) { |
| 698 |
if (s == null) { |
| 699 |
highlights = []; |
| 700 |
plot.triggerRedrawOverlay(); |
| 701 |
} |
| 702 |
|
| 703 |
//if (typeof s == "number") { |
| 704 |
// s = series[s]; |
| 705 |
//} |
| 706 |
|
| 707 |
var i = indexOfHighlight(s); |
| 708 |
|
| 709 |
if (i != -1) { |
| 710 |
highlights.splice(i, 1); |
| 711 |
plot.triggerRedrawOverlay(); |
| 712 |
} |
| 713 |
} |
| 714 |
|
| 715 |
function indexOfHighlight(s) { |
| 716 |
for (var i = 0; i < highlights.length; ++i) { |
| 717 |
var h = highlights[i]; |
| 718 |
if (h.series == s) |
| 719 |
return i; |
| 720 |
} |
| 721 |
return -1; |
| 722 |
} |
| 723 |
|
| 724 |
function drawOverlay(plot, octx) { |
| 725 |
|
| 726 |
var options = plot.getOptions(); |
| 727 |
|
| 728 |
var radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius; |
| 729 |
|
| 730 |
octx.save(); |
| 731 |
octx.translate(centerLeft, centerTop); |
| 732 |
octx.scale(1, options.series.pie.tilt); |
| 733 |
|
| 734 |
for (var i = 0; i < highlights.length; ++i) { |
| 735 |
drawHighlight(highlights[i].series); |
| 736 |
} |
| 737 |
|
| 738 |
drawDonutHole(octx); |
| 739 |
|
| 740 |
octx.restore(); |
| 741 |
|
| 742 |
function drawHighlight(series) { |
| 743 |
|
| 744 |
if (series.angle <= 0 || isNaN(series.angle)) { |
| 745 |
return; |
| 746 |
} |
| 747 |
|
| 748 |
//octx.fillStyle = parseColor(options.series.pie.highlight.color).scale(null, null, null, options.series.pie.highlight.opacity).toString(); |
| 749 |
octx.fillStyle = "rgba(255, 255, 255, " + options.series.pie.highlight.opacity + ")"; // this is temporary until we have access to parseColor |
| 750 |
octx.beginPath(); |
| 751 |
if (Math.abs(series.angle - Math.PI * 2) > 0.000000001) { |
| 752 |
octx.moveTo(0, 0); // Center of the pie |
| 753 |
} |
| 754 |
octx.arc(0, 0, radius, series.startAngle, series.startAngle + series.angle / 2, false); |
| 755 |
octx.arc(0, 0, radius, series.startAngle + series.angle / 2, series.startAngle + series.angle, false); |
| 756 |
octx.closePath(); |
| 757 |
octx.fill(); |
| 758 |
} |
| 759 |
} |
| 760 |
} // end init (plugin body) |
| 761 |
|
| 762 |
// define pie specific options and their default values |
| 763 |
|
| 764 |
var options = { |
| 765 |
series: { |
| 766 |
pie: { |
| 767 |
show: false, |
| 768 |
radius: "auto", // actual radius of the visible pie (based on full calculated radius if <=1, or hard pixel value) |
| 769 |
innerRadius: 0, /* for donut */ |
| 770 |
startAngle: 3/2, |
| 771 |
tilt: 1, |
| 772 |
shadow: { |
| 773 |
left: 5, // shadow left offset |
| 774 |
top: 15, // shadow top offset |
| 775 |
alpha: 0.02 // shadow alpha |
| 776 |
}, |
| 777 |
offset: { |
| 778 |
top: 0, |
| 779 |
left: "auto" |
| 780 |
}, |
| 781 |
stroke: { |
| 782 |
color: "#fff", |
| 783 |
width: 1 |
| 784 |
}, |
| 785 |
label: { |
| 786 |
show: "auto", |
| 787 |
formatter: function(label, slice) { |
| 788 |
return "<div style='font-size:x-small;text-align:center;padding:2px;color:" + slice.color + ";'>" + label + "<br/>" + Math.round(slice.percent) + "%</div>"; |
| 789 |
}, // formatter function |
| 790 |
radius: 1, // radius at which to place the labels (based on full calculated radius if <=1, or hard pixel value) |
| 791 |
background: { |
| 792 |
color: null, |
| 793 |
opacity: 0 |
| 794 |
}, |
| 795 |
threshold: 0 // percentage at which to hide the label (i.e. the slice is too narrow) |
| 796 |
}, |
| 797 |
combine: { |
| 798 |
threshold: -1, // percentage at which to combine little slices into one larger slice |
| 799 |
color: null, // color to give the new slice (auto-generated if null) |
| 800 |
label: "Other" // label to give the new slice |
| 801 |
}, |
| 802 |
highlight: { |
| 803 |
//color: "#fff", // will add this functionality once parseColor is available |
| 804 |
opacity: 0.5 |
| 805 |
} |
| 806 |
} |
| 807 |
} |
| 808 |
}; |
| 809 |
|
| 810 |
$.plot.plugins.push({ |
| 811 |
init: init, |
| 812 |
options: options, |
| 813 |
name: "pie", |
| 814 |
version: "1.1" |
| 815 |
}); |
| 816 |
|
| 817 |
})(jQuery); |
