Mercurial > hg > extraction-interface
annotate geotemco/lib/flot/jquery.flot.pie.js @ 44:3163d8ca0b62 default
closing default branch, we use extractapp branch
author | Zoe Hong <zhong@mpiwg-berlin.mpg.de> |
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date | Fri, 13 Mar 2015 09:55:07 +0100 |
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1 /* Flot plugin for rendering pie charts. |
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2 |
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3 Copyright (c) 2007-2013 IOLA and Ole Laursen. |
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4 Licensed under the MIT license. |
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5 |
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6 The plugin assumes that each series has a single data value, and that each |
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7 value is a positive integer or zero. Negative numbers don't make sense for a |
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8 pie chart, and have unpredictable results. The values do NOT need to be |
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9 passed in as percentages; the plugin will calculate the total and per-slice |
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10 percentages internally. |
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11 |
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12 * Created by Brian Medendorp |
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13 |
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14 * Updated with contributions from btburnett3, Anthony Aragues and Xavi Ivars |
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15 |
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16 The plugin supports these options: |
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17 |
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18 series: { |
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19 pie: { |
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20 show: true/false |
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21 radius: 0-1 for percentage of fullsize, or a specified pixel length, or 'auto' |
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22 innerRadius: 0-1 for percentage of fullsize or a specified pixel length, for creating a donut effect |
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23 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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24 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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25 offset: { |
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26 top: integer value to move the pie up or down |
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27 left: integer value to move the pie left or right, or 'auto' |
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28 }, |
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29 stroke: { |
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30 color: any hexidecimal color value (other formats may or may not work, so best to stick with something like '#FFF') |
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31 width: integer pixel width of the stroke |
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32 }, |
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33 label: { |
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34 show: true/false, or 'auto' |
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35 formatter: a user-defined function that modifies the text/style of the label text |
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36 radius: 0-1 for percentage of fullsize, or a specified pixel length |
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37 background: { |
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38 color: any hexidecimal color value (other formats may or may not work, so best to stick with something like '#000') |
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39 opacity: 0-1 |
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40 }, |
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41 threshold: 0-1 for the percentage value at which to hide labels (if they're too small) |
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42 }, |
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43 combine: { |
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44 threshold: 0-1 for the percentage value at which to combine slices (if they're too small) |
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45 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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46 label: any text value of what the combined slice should be labeled |
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47 } |
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48 highlight: { |
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49 opacity: 0-1 |
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50 } |
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51 } |
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52 } |
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53 |
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54 More detail and specific examples can be found in the included HTML file. |
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55 |
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56 */ |
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57 |
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58 (function($) { |
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59 |
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60 // Maximum redraw attempts when fitting labels within the plot |
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61 |
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62 var REDRAW_ATTEMPTS = 10; |
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63 |
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64 // Factor by which to shrink the pie when fitting labels within the plot |
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65 |
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66 var REDRAW_SHRINK = 0.95; |
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67 |
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68 function init(plot) { |
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69 |
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70 var canvas = null, |
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71 target = null, |
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72 options = null, |
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73 maxRadius = null, |
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74 centerLeft = null, |
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75 centerTop = null, |
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76 processed = false, |
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77 ctx = null; |
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78 |
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79 // interactive variables |
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80 |
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81 var highlights = []; |
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82 |
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83 // add hook to determine if pie plugin in enabled, and then perform necessary operations |
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84 |
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85 plot.hooks.processOptions.push(function(plot, options) { |
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86 if (options.series.pie.show) { |
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87 |
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88 options.grid.show = false; |
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89 |
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90 // set labels.show |
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91 |
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92 if (options.series.pie.label.show == "auto") { |
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93 if (options.legend.show) { |
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94 options.series.pie.label.show = false; |
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95 } else { |
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96 options.series.pie.label.show = true; |
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97 } |
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98 } |
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99 |
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100 // set radius |
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101 |
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102 if (options.series.pie.radius == "auto") { |
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103 if (options.series.pie.label.show) { |
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104 options.series.pie.radius = 3/4; |
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105 } else { |
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106 options.series.pie.radius = 1; |
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107 } |
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108 } |
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109 |
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110 // ensure sane tilt |
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111 |
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112 if (options.series.pie.tilt > 1) { |
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113 options.series.pie.tilt = 1; |
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114 } else if (options.series.pie.tilt < 0) { |
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115 options.series.pie.tilt = 0; |
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116 } |
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117 } |
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118 }); |
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119 |
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120 plot.hooks.bindEvents.push(function(plot, eventHolder) { |
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121 var options = plot.getOptions(); |
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122 if (options.series.pie.show) { |
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123 if (options.grid.hoverable) { |
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124 eventHolder.unbind("mousemove").mousemove(onMouseMove); |
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125 } |
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126 if (options.grid.clickable) { |
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127 eventHolder.unbind("click").click(onClick); |
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128 } |
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129 } |
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130 }); |
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131 |
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132 plot.hooks.processDatapoints.push(function(plot, series, data, datapoints) { |
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133 var options = plot.getOptions(); |
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134 if (options.series.pie.show) { |
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135 processDatapoints(plot, series, data, datapoints); |
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136 } |
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137 }); |
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138 |
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139 plot.hooks.drawOverlay.push(function(plot, octx) { |
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140 var options = plot.getOptions(); |
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141 if (options.series.pie.show) { |
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142 drawOverlay(plot, octx); |
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143 } |
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144 }); |
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145 |
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146 plot.hooks.draw.push(function(plot, newCtx) { |
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147 var options = plot.getOptions(); |
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148 if (options.series.pie.show) { |
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149 draw(plot, newCtx); |
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150 } |
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151 }); |
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152 |
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153 function processDatapoints(plot, series, datapoints) { |
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154 if (!processed) { |
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155 processed = true; |
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156 canvas = plot.getCanvas(); |
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157 target = $(canvas).parent(); |
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158 options = plot.getOptions(); |
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159 plot.setData(combine(plot.getData())); |
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160 } |
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161 } |
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162 |
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163 function combine(data) { |
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164 |
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165 var total = 0, |
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166 combined = 0, |
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167 numCombined = 0, |
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168 color = options.series.pie.combine.color, |
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169 newdata = []; |
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170 |
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171 // Fix up the raw data from Flot, ensuring the data is numeric |
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172 |
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173 for (var i = 0; i < data.length; ++i) { |
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174 |
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175 var value = data[i].data; |
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176 |
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177 // If the data is an array, we'll assume that it's a standard |
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178 // Flot x-y pair, and are concerned only with the second value. |
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179 |
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180 // Note how we use the original array, rather than creating a |
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181 // new one; this is more efficient and preserves any extra data |
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182 // that the user may have stored in higher indexes. |
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183 |
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184 if ($.isArray(value) && value.length == 1) { |
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185 value = value[0]; |
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186 } |
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187 |
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188 if ($.isArray(value)) { |
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189 // Equivalent to $.isNumeric() but compatible with jQuery < 1.7 |
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190 if (!isNaN(parseFloat(value[1])) && isFinite(value[1])) { |
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191 value[1] = +value[1]; |
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192 } else { |
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193 value[1] = 0; |
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194 } |
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195 } else if (!isNaN(parseFloat(value)) && isFinite(value)) { |
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196 value = [1, +value]; |
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197 } else { |
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198 value = [1, 0]; |
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199 } |
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200 |
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201 data[i].data = [value]; |
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202 } |
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203 |
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204 // Sum up all the slices, so we can calculate percentages for each |
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205 |
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206 for (var i = 0; i < data.length; ++i) { |
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207 total += data[i].data[0][1]; |
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208 } |
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209 |
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210 // Count the number of slices with percentages below the combine |
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211 // threshold; if it turns out to be just one, we won't combine. |
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212 |
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213 for (var i = 0; i < data.length; ++i) { |
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214 var value = data[i].data[0][1]; |
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215 if (value / total <= options.series.pie.combine.threshold) { |
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216 combined += value; |
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217 numCombined++; |
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218 if (!color) { |
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219 color = data[i].color; |
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220 } |
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221 } |
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222 } |
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223 |
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224 for (var i = 0; i < data.length; ++i) { |
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225 var value = data[i].data[0][1]; |
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226 if (numCombined < 2 || value / total > options.series.pie.combine.threshold) { |
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227 newdata.push( |
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228 $.extend(data[i], { /* extend to allow keeping all other original data values |
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229 and using them e.g. in labelFormatter. */ |
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230 data: [[1, value]], |
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231 color: data[i].color, |
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232 label: data[i].label, |
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233 angle: value * Math.PI * 2 / total, |
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234 percent: value / (total / 100) |
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235 }) |
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236 ); |
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237 } |
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238 } |
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239 |
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240 if (numCombined > 1) { |
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241 newdata.push({ |
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242 data: [[1, combined]], |
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243 color: color, |
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244 label: options.series.pie.combine.label, |
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245 angle: combined * Math.PI * 2 / total, |
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246 percent: combined / (total / 100) |
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247 }); |
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248 } |
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249 |
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250 return newdata; |
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251 } |
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252 |
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253 function draw(plot, newCtx) { |
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254 |
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255 if (!target) { |
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256 return; // if no series were passed |
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257 } |
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258 |
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259 var canvasWidth = plot.getPlaceholder().width(), |
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260 canvasHeight = plot.getPlaceholder().height(), |
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261 legendWidth = target.children().filter(".legend").children().width() || 0; |
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262 |
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263 ctx = newCtx; |
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264 |
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265 // WARNING: HACK! REWRITE THIS CODE AS SOON AS POSSIBLE! |
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266 |
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267 // When combining smaller slices into an 'other' slice, we need to |
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268 // add a new series. Since Flot gives plugins no way to modify the |
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269 // list of series, the pie plugin uses a hack where the first call |
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270 // to processDatapoints results in a call to setData with the new |
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271 // list of series, then subsequent processDatapoints do nothing. |
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272 |
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273 // The plugin-global 'processed' flag is used to control this hack; |
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274 // it starts out false, and is set to true after the first call to |
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275 // processDatapoints. |
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276 |
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277 // Unfortunately this turns future setData calls into no-ops; they |
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278 // call processDatapoints, the flag is true, and nothing happens. |
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279 |
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280 // To fix this we'll set the flag back to false here in draw, when |
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281 // all series have been processed, so the next sequence of calls to |
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282 // processDatapoints once again starts out with a slice-combine. |
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283 // This is really a hack; in 0.9 we need to give plugins a proper |
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284 // way to modify series before any processing begins. |
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285 |
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286 processed = false; |
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287 |
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288 // calculate maximum radius and center point |
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289 |
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290 maxRadius = Math.min(canvasWidth, canvasHeight / options.series.pie.tilt) / 2; |
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291 centerTop = canvasHeight / 2 + options.series.pie.offset.top; |
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292 centerLeft = canvasWidth / 2; |
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293 |
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294 if (options.series.pie.offset.left == "auto") { |
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295 if (options.legend.position.match("w")) { |
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296 centerLeft += legendWidth / 2; |
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297 } else { |
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298 centerLeft -= legendWidth / 2; |
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299 } |
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300 if (centerLeft < maxRadius) { |
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301 centerLeft = maxRadius; |
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302 } else if (centerLeft > canvasWidth - maxRadius) { |
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303 centerLeft = canvasWidth - maxRadius; |
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304 } |
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305 } else { |
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306 centerLeft += options.series.pie.offset.left; |
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307 } |
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308 |
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309 var slices = plot.getData(), |
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310 attempts = 0; |
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311 |
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312 // Keep shrinking the pie's radius until drawPie returns true, |
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313 // indicating that all the labels fit, or we try too many times. |
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314 |
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315 do { |
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316 if (attempts > 0) { |
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317 maxRadius *= REDRAW_SHRINK; |
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318 } |
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319 attempts += 1; |
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320 clear(); |
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321 if (options.series.pie.tilt <= 0.8) { |
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322 drawShadow(); |
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323 } |
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324 } while (!drawPie() && attempts < REDRAW_ATTEMPTS) |
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325 |
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326 if (attempts >= REDRAW_ATTEMPTS) { |
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327 clear(); |
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328 target.prepend("<div class='error'>Could not draw pie with labels contained inside canvas</div>"); |
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329 } |
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330 |
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331 if (plot.setSeries && plot.insertLegend) { |
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332 plot.setSeries(slices); |
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333 plot.insertLegend(); |
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334 } |
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335 |
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336 // we're actually done at this point, just defining internal functions at this point |
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337 |
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338 function clear() { |
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339 ctx.clearRect(0, 0, canvasWidth, canvasHeight); |
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340 target.children().filter(".pieLabel, .pieLabelBackground").remove(); |
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341 } |
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342 |
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343 function drawShadow() { |
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344 |
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345 var shadowLeft = options.series.pie.shadow.left; |
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346 var shadowTop = options.series.pie.shadow.top; |
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347 var edge = 10; |
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348 var alpha = options.series.pie.shadow.alpha; |
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349 var radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius; |
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350 |
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351 if (radius >= canvasWidth / 2 - shadowLeft || radius * options.series.pie.tilt >= canvasHeight / 2 - shadowTop || radius <= edge) { |
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352 return; // shadow would be outside canvas, so don't draw it |
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353 } |
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354 |
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355 ctx.save(); |
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356 ctx.translate(shadowLeft,shadowTop); |
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357 ctx.globalAlpha = alpha; |
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358 ctx.fillStyle = "#000"; |
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359 |
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360 // center and rotate to starting position |
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361 |
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362 ctx.translate(centerLeft,centerTop); |
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363 ctx.scale(1, options.series.pie.tilt); |
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364 |
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365 //radius -= edge; |
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366 |
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367 for (var i = 1; i <= edge; i++) { |
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368 ctx.beginPath(); |
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369 ctx.arc(0, 0, radius, 0, Math.PI * 2, false); |
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370 ctx.fill(); |
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371 radius -= i; |
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372 } |
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373 |
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374 ctx.restore(); |
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375 } |
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376 |
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377 function drawPie() { |
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378 |
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379 var startAngle = Math.PI * options.series.pie.startAngle; |
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380 var radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius; |
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381 |
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382 // center and rotate to starting position |
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383 |
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384 ctx.save(); |
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385 ctx.translate(centerLeft,centerTop); |
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386 ctx.scale(1, options.series.pie.tilt); |
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387 //ctx.rotate(startAngle); // start at top; -- This doesn't work properly in Opera |
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388 |
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389 // draw slices |
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390 |
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391 ctx.save(); |
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392 var currentAngle = startAngle; |
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393 for (var i = 0; i < slices.length; ++i) { |
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394 slices[i].startAngle = currentAngle; |
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395 drawSlice(slices[i].angle, slices[i].color, true); |
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396 } |
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397 ctx.restore(); |
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398 |
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399 // draw slice outlines |
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400 |
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401 if (options.series.pie.stroke.width > 0) { |
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402 ctx.save(); |
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403 ctx.lineWidth = options.series.pie.stroke.width; |
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404 currentAngle = startAngle; |
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405 for (var i = 0; i < slices.length; ++i) { |
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406 drawSlice(slices[i].angle, options.series.pie.stroke.color, false); |
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407 } |
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408 ctx.restore(); |
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409 } |
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410 |
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411 // draw donut hole |
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412 |
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413 drawDonutHole(ctx); |
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414 |
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415 ctx.restore(); |
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416 |
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417 // Draw the labels, returning true if they fit within the plot |
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418 |
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419 if (options.series.pie.label.show) { |
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420 return drawLabels(); |
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421 } else return true; |
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422 |
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423 function drawSlice(angle, color, fill) { |
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424 |
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425 if (angle <= 0 || isNaN(angle)) { |
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426 return; |
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427 } |
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428 |
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429 if (fill) { |
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430 ctx.fillStyle = color; |
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431 } else { |
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432 ctx.strokeStyle = color; |
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433 ctx.lineJoin = "round"; |
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434 } |
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435 |
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436 ctx.beginPath(); |
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437 if (Math.abs(angle - Math.PI * 2) > 0.000000001) { |
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438 ctx.moveTo(0, 0); // Center of the pie |
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439 } |
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440 |
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441 //ctx.arc(0, 0, radius, 0, angle, false); // This doesn't work properly in Opera |
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442 ctx.arc(0, 0, radius,currentAngle, currentAngle + angle / 2, false); |
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443 ctx.arc(0, 0, radius,currentAngle + angle / 2, currentAngle + angle, false); |
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444 ctx.closePath(); |
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445 //ctx.rotate(angle); // This doesn't work properly in Opera |
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446 currentAngle += angle; |
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447 |
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448 if (fill) { |
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449 ctx.fill(); |
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450 } else { |
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451 ctx.stroke(); |
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452 } |
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453 } |
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454 |
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455 function drawLabels() { |
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456 |
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457 var currentAngle = startAngle; |
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458 var radius = options.series.pie.label.radius > 1 ? options.series.pie.label.radius : maxRadius * options.series.pie.label.radius; |
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459 |
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460 for (var i = 0; i < slices.length; ++i) { |
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461 if (slices[i].percent >= options.series.pie.label.threshold * 100) { |
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462 if (!drawLabel(slices[i], currentAngle, i)) { |
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463 return false; |
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464 } |
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465 } |
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466 currentAngle += slices[i].angle; |
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467 } |
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468 |
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469 return true; |
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470 |
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471 function drawLabel(slice, startAngle, index) { |
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472 |
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473 if (slice.data[0][1] == 0) { |
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474 return true; |
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475 } |
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476 |
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477 // format label text |
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478 |
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479 var lf = options.legend.labelFormatter, text, plf = options.series.pie.label.formatter; |
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480 |
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481 if (lf) { |
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482 text = lf(slice.label, slice); |
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483 } else { |
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484 text = slice.label; |
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485 } |
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486 |
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487 if (plf) { |
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488 text = plf(text, slice); |
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489 } |
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490 |
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491 var halfAngle = ((startAngle + slice.angle) + startAngle) / 2; |
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492 var x = centerLeft + Math.round(Math.cos(halfAngle) * radius); |
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493 var y = centerTop + Math.round(Math.sin(halfAngle) * radius) * options.series.pie.tilt; |
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494 |
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495 var html = "<span class='pieLabel' id='pieLabel" + index + "' style='position:absolute;top:" + y + "px;left:" + x + "px;'>" + text + "</span>"; |
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496 target.append(html); |
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497 |
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498 var label = target.children("#pieLabel" + index); |
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499 var labelTop = (y - label.height() / 2); |
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500 var labelLeft = (x - label.width() / 2); |
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501 |
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502 label.css("top", labelTop); |
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503 label.css("left", labelLeft); |
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504 |
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505 // check to make sure that the label is not outside the canvas |
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506 |
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507 if (0 - labelTop > 0 || 0 - labelLeft > 0 || canvasHeight - (labelTop + label.height()) < 0 || canvasWidth - (labelLeft + label.width()) < 0) { |
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508 return false; |
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509 } |
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510 |
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511 if (options.series.pie.label.background.opacity != 0) { |
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512 |
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513 // put in the transparent background separately to avoid blended labels and label boxes |
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514 |
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515 var c = options.series.pie.label.background.color; |
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516 |
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517 if (c == null) { |
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518 c = slice.color; |
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519 } |
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520 |
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521 var pos = "top:" + labelTop + "px;left:" + labelLeft + "px;"; |
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522 $("<div class='pieLabelBackground' style='position:absolute;width:" + label.width() + "px;height:" + label.height() + "px;" + pos + "background-color:" + c + ";'></div>") |
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523 .css("opacity", options.series.pie.label.background.opacity) |
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524 .insertBefore(label); |
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525 } |
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526 |
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527 return true; |
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528 } // end individual label function |
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529 } // end drawLabels function |
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530 } // end drawPie function |
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531 } // end draw function |
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532 |
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533 // Placed here because it needs to be accessed from multiple locations |
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534 |
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535 function drawDonutHole(layer) { |
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536 if (options.series.pie.innerRadius > 0) { |
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537 |
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538 // subtract the center |
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539 |
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540 layer.save(); |
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541 var innerRadius = options.series.pie.innerRadius > 1 ? options.series.pie.innerRadius : maxRadius * options.series.pie.innerRadius; |
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542 layer.globalCompositeOperation = "destination-out"; // this does not work with excanvas, but it will fall back to using the stroke color |
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543 layer.beginPath(); |
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544 layer.fillStyle = options.series.pie.stroke.color; |
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545 layer.arc(0, 0, innerRadius, 0, Math.PI * 2, false); |
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546 layer.fill(); |
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547 layer.closePath(); |
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548 layer.restore(); |
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549 |
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550 // add inner stroke |
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551 |
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552 layer.save(); |
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553 layer.beginPath(); |
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554 layer.strokeStyle = options.series.pie.stroke.color; |
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555 layer.arc(0, 0, innerRadius, 0, Math.PI * 2, false); |
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556 layer.stroke(); |
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557 layer.closePath(); |
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558 layer.restore(); |
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559 |
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560 // TODO: add extra shadow inside hole (with a mask) if the pie is tilted. |
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561 } |
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562 } |
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563 |
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564 //-- Additional Interactive related functions -- |
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565 |
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566 function isPointInPoly(poly, pt) { |
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567 for(var c = false, i = -1, l = poly.length, j = l - 1; ++i < l; j = i) |
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568 ((poly[i][1] <= pt[1] && pt[1] < poly[j][1]) || (poly[j][1] <= pt[1] && pt[1]< poly[i][1])) |
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569 && (pt[0] < (poly[j][0] - poly[i][0]) * (pt[1] - poly[i][1]) / (poly[j][1] - poly[i][1]) + poly[i][0]) |
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570 && (c = !c); |
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571 return c; |
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572 } |
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573 |
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574 function findNearbySlice(mouseX, mouseY) { |
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575 |
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576 var slices = plot.getData(), |
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577 options = plot.getOptions(), |
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578 radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius, |
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579 x, y; |
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580 |
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581 for (var i = 0; i < slices.length; ++i) { |
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582 |
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583 var s = slices[i]; |
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584 |
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585 if (s.pie.show) { |
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586 |
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587 ctx.save(); |
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588 ctx.beginPath(); |
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589 ctx.moveTo(0, 0); // Center of the pie |
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590 //ctx.scale(1, options.series.pie.tilt); // this actually seems to break everything when here. |
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591 ctx.arc(0, 0, radius, s.startAngle, s.startAngle + s.angle / 2, false); |
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592 ctx.arc(0, 0, radius, s.startAngle + s.angle / 2, s.startAngle + s.angle, false); |
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593 ctx.closePath(); |
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594 x = mouseX - centerLeft; |
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595 y = mouseY - centerTop; |
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596 |
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597 if (ctx.isPointInPath) { |
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598 if (ctx.isPointInPath(mouseX - centerLeft, mouseY - centerTop)) { |
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599 ctx.restore(); |
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600 return { |
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601 datapoint: [s.percent, s.data], |
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602 dataIndex: 0, |
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603 series: s, |
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604 seriesIndex: i |
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605 }; |
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606 } |
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607 } else { |
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608 |
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609 // excanvas for IE doesn;t support isPointInPath, this is a workaround. |
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610 |
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611 var p1X = radius * Math.cos(s.startAngle), |
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612 p1Y = radius * Math.sin(s.startAngle), |
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613 p2X = radius * Math.cos(s.startAngle + s.angle / 4), |
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614 p2Y = radius * Math.sin(s.startAngle + s.angle / 4), |
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615 p3X = radius * Math.cos(s.startAngle + s.angle / 2), |
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616 p3Y = radius * Math.sin(s.startAngle + s.angle / 2), |
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617 p4X = radius * Math.cos(s.startAngle + s.angle / 1.5), |
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618 p4Y = radius * Math.sin(s.startAngle + s.angle / 1.5), |
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619 p5X = radius * Math.cos(s.startAngle + s.angle), |
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620 p5Y = radius * Math.sin(s.startAngle + s.angle), |
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621 arrPoly = [[0, 0], [p1X, p1Y], [p2X, p2Y], [p3X, p3Y], [p4X, p4Y], [p5X, p5Y]], |
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622 arrPoint = [x, y]; |
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623 |
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624 // TODO: perhaps do some mathmatical trickery here with the Y-coordinate to compensate for pie tilt? |
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625 |
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626 if (isPointInPoly(arrPoly, arrPoint)) { |
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627 ctx.restore(); |
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628 return { |
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629 datapoint: [s.percent, s.data], |
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630 dataIndex: 0, |
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631 series: s, |
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632 seriesIndex: i |
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633 }; |
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634 } |
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635 } |
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636 |
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637 ctx.restore(); |
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638 } |
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639 } |
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640 |
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641 return null; |
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642 } |
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643 |
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644 function onMouseMove(e) { |
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645 triggerClickHoverEvent("plothover", e); |
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646 } |
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647 |
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648 function onClick(e) { |
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649 triggerClickHoverEvent("plotclick", e); |
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650 } |
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651 |
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652 // trigger click or hover event (they send the same parameters so we share their code) |
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653 |
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654 function triggerClickHoverEvent(eventname, e) { |
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655 |
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656 var offset = plot.offset(); |
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657 var canvasX = parseInt(e.pageX - offset.left); |
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658 var canvasY = parseInt(e.pageY - offset.top); |
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659 var item = findNearbySlice(canvasX, canvasY); |
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660 |
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661 if (options.grid.autoHighlight) { |
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662 |
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663 // clear auto-highlights |
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664 |
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665 for (var i = 0; i < highlights.length; ++i) { |
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666 var h = highlights[i]; |
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667 if (h.auto == eventname && !(item && h.series == item.series)) { |
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668 unhighlight(h.series); |
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669 } |
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670 } |
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671 } |
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672 |
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673 // highlight the slice |
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674 |
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675 if (item) { |
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676 highlight(item.series, eventname); |
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677 } |
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678 |
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679 // trigger any hover bind events |
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680 |
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681 var pos = { pageX: e.pageX, pageY: e.pageY }; |
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682 target.trigger(eventname, [pos, item]); |
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683 } |
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684 |
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685 function highlight(s, auto) { |
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686 //if (typeof s == "number") { |
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687 // s = series[s]; |
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688 //} |
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689 |
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690 var i = indexOfHighlight(s); |
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691 |
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692 if (i == -1) { |
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693 highlights.push({ series: s, auto: auto }); |
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694 plot.triggerRedrawOverlay(); |
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695 } else if (!auto) { |
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696 highlights[i].auto = false; |
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697 } |
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698 } |
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699 |
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700 function unhighlight(s) { |
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701 if (s == null) { |
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702 highlights = []; |
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703 plot.triggerRedrawOverlay(); |
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704 } |
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705 |
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706 //if (typeof s == "number") { |
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707 // s = series[s]; |
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708 //} |
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709 |
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710 var i = indexOfHighlight(s); |
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711 |
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712 if (i != -1) { |
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713 highlights.splice(i, 1); |
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714 plot.triggerRedrawOverlay(); |
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715 } |
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716 } |
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717 |
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718 function indexOfHighlight(s) { |
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719 for (var i = 0; i < highlights.length; ++i) { |
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720 var h = highlights[i]; |
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721 if (h.series == s) |
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722 return i; |
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723 } |
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724 return -1; |
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725 } |
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726 |
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727 function drawOverlay(plot, octx) { |
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728 |
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729 var options = plot.getOptions(); |
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730 |
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731 var radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius; |
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732 |
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733 octx.save(); |
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734 octx.translate(centerLeft, centerTop); |
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735 octx.scale(1, options.series.pie.tilt); |
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736 |
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737 for (var i = 0; i < highlights.length; ++i) { |
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738 drawHighlight(highlights[i].series); |
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739 } |
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740 |
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741 drawDonutHole(octx); |
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742 |
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743 octx.restore(); |
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744 |
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745 function drawHighlight(series) { |
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746 |
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747 if (series.angle <= 0 || isNaN(series.angle)) { |
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748 return; |
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749 } |
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750 |
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751 //octx.fillStyle = parseColor(options.series.pie.highlight.color).scale(null, null, null, options.series.pie.highlight.opacity).toString(); |
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752 octx.fillStyle = "rgba(255, 255, 255, " + options.series.pie.highlight.opacity + ")"; // this is temporary until we have access to parseColor |
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753 octx.beginPath(); |
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754 if (Math.abs(series.angle - Math.PI * 2) > 0.000000001) { |
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755 octx.moveTo(0, 0); // Center of the pie |
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756 } |
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757 octx.arc(0, 0, radius, series.startAngle, series.startAngle + series.angle / 2, false); |
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758 octx.arc(0, 0, radius, series.startAngle + series.angle / 2, series.startAngle + series.angle, false); |
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759 octx.closePath(); |
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760 octx.fill(); |
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761 } |
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762 } |
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763 } // end init (plugin body) |
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764 |
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765 // define pie specific options and their default values |
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766 |
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767 var options = { |
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768 series: { |
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769 pie: { |
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770 show: false, |
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771 radius: "auto", // actual radius of the visible pie (based on full calculated radius if <=1, or hard pixel value) |
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772 innerRadius: 0, /* for donut */ |
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773 startAngle: 3/2, |
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774 tilt: 1, |
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775 shadow: { |
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776 left: 5, // shadow left offset |
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777 top: 15, // shadow top offset |
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778 alpha: 0.02 // shadow alpha |
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779 }, |
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780 offset: { |
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781 top: 0, |
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782 left: "auto" |
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783 }, |
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784 stroke: { |
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785 color: "#fff", |
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786 width: 1 |
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787 }, |
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788 label: { |
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789 show: "auto", |
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790 formatter: function(label, slice) { |
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791 return "<div style='font-size:x-small;text-align:center;padding:2px;color:" + slice.color + ";'>" + label + "<br/>" + Math.round(slice.percent) + "%</div>"; |
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792 }, // formatter function |
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793 radius: 1, // radius at which to place the labels (based on full calculated radius if <=1, or hard pixel value) |
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794 background: { |
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795 color: null, |
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796 opacity: 0 |
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797 }, |
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798 threshold: 0 // percentage at which to hide the label (i.e. the slice is too narrow) |
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799 }, |
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800 combine: { |
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801 threshold: -1, // percentage at which to combine little slices into one larger slice |
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802 color: null, // color to give the new slice (auto-generated if null) |
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803 label: "Other" // label to give the new slice |
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804 }, |
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805 highlight: { |
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806 //color: "#fff", // will add this functionality once parseColor is available |
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807 opacity: 0.5 |
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808 } |
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809 } |
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810 } |
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811 }; |
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812 |
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813 $.plot.plugins.push({ |
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814 init: init, |
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815 options: options, |
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816 name: "pie", |
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817 version: "1.1" |
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818 }); |
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819 |
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820 })(jQuery); |