MyEMS /
myems
| Conditions | 108 |
| Total Lines | 696 |
| Code Lines | 374 |
| Lines | 0 |
| Ratio | 0 % |
| Changes | 0 | ||
Small methods make your code easier to understand, in particular if combined with a good name. Besides, if your method is small, finding a good name is usually much easier.
For example, if you find yourself adding comments to a method's body, this is usually a good sign to extract the commented part to a new method, and use the comment as a starting point when coming up with a good name for this new method.
Commonly applied refactorings include:
If many parameters/temporary variables are present:
Complex classes like jquery.flot.pie.js ➔ init often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
| 1 | /* Flot plugin for rendering pie charts. |
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| 68 | function init(plot) { |
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| 69 | |||
| 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 | |||
| 79 | // interactive variables |
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| 80 | |||
| 81 | var highlights = []; |
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| 82 | |||
| 83 | // add hook to determine if pie plugin in enabled, and then perform necessary operations |
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| 84 | |||
| 85 | plot.hooks.processOptions.push(function(plot, options) { |
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| 86 | if (options.series.pie.show) { |
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| 87 | |||
| 88 | options.grid.show = false; |
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| 89 | |||
| 90 | // set labels.show |
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| 91 | |||
| 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 | |||
| 100 | // set radius |
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| 101 | |||
| 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 | |||
| 110 | // ensure sane tilt |
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| 111 | |||
| 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 | |||
| 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 | |||
| 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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|
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| 136 | } |
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| 137 | }); |
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| 138 | |||
| 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 | |||
| 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 | |||
| 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 = $(canvas).parent(); |
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| 158 | options = plot.getOptions(); |
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| 159 | plot.setData(combine(plot.getData())); |
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| 160 | } |
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| 161 | } |
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| 162 | |||
| 163 | function combine(data) { |
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| 164 | |||
| 165 | var total = 0, |
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| 166 | combined = 0, |
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| 167 | numCombined = 0, |
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| 168 | color = options.series.pie.combine.color, |
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| 169 | newdata = []; |
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| 170 | |||
| 171 | // Fix up the raw data from Flot, ensuring the data is numeric |
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| 172 | |||
| 173 | for (var i = 0; i < data.length; ++i) { |
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| 174 | |||
| 175 | var value = data[i].data; |
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| 176 | |||
| 177 | // If the data is an array, we'll assume that it's a standard |
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| 178 | // Flot x-y pair, and are concerned only with the second value. |
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| 179 | |||
| 180 | // Note how we use the original array, rather than creating a |
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| 181 | // new one; this is more efficient and preserves any extra data |
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| 182 | // that the user may have stored in higher indexes. |
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| 183 | |||
| 184 | if ($.isArray(value) && value.length == 1) { |
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| 185 | value = value[0]; |
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| 186 | } |
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| 187 | |||
| 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 | |||
| 201 | data[i].data = [value]; |
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| 202 | } |
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| 203 | |||
| 204 | // Sum up all the slices, so we can calculate percentages for each |
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| 205 | |||
| 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 | |||
| 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 | |||
| 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 | |||
| 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 | |||
| 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 | |||
| 250 | return newdata; |
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| 251 | } |
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| 252 | |||
| 253 | function draw(plot, newCtx) { |
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| 254 | |||
| 255 | if (!target) { |
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| 256 | return; // if no series were passed |
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| 257 | } |
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| 258 | |||
| 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 | |||
| 263 | ctx = newCtx; |
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| 264 | |||
| 265 | // WARNING: HACK! REWRITE THIS CODE AS SOON AS POSSIBLE! |
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| 266 | |||
| 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 | |||
| 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 | |||
| 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 | |||
| 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 | |||
| 286 | processed = false; |
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| 287 | |||
| 288 | // calculate maximum radius and center point |
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| 289 | |||
| 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 | |||
| 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 | |||
| 309 | var slices = plot.getData(), |
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| 310 | attempts = 0; |
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| 311 | |||
| 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 | |||
| 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 | |||
| 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 | |||
| 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 | |||
| 336 | // we're actually done at this point, just defining internal functions at this point |
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| 337 | |||
| 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 | |||
| 343 | function drawShadow() { |
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| 344 | |||
| 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 | |||
| 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 | |||
| 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 | |||
| 360 | // center and rotate to starting position |
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| 361 | |||
| 362 | ctx.translate(centerLeft,centerTop); |
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| 363 | ctx.scale(1, options.series.pie.tilt); |
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| 364 | |||
| 365 | //radius -= edge; |
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| 366 | |||
| 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 | |||
| 374 | ctx.restore(); |
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| 375 | } |
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| 376 | |||
| 377 | function drawPie() { |
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| 378 | |||
| 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 | |||
| 382 | // center and rotate to starting position |
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| 383 | |||
| 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 | |||
| 389 | // draw slices |
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| 390 | |||
| 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 | |||
| 399 | // draw slice outlines |
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| 400 | |||
| 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 | |||
| 411 | // draw donut hole |
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| 412 | |||
| 413 | drawDonutHole(ctx); |
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| 414 | |||
| 415 | ctx.restore(); |
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| 416 | |||
| 417 | // Draw the labels, returning true if they fit within the plot |
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| 418 | |||
| 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 | |||
| 423 | function drawSlice(angle, color, fill) { |
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| 424 | |||
| 425 | if (angle <= 0 || isNaN(angle)) { |
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| 426 | return; |
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| 427 | } |
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| 428 | |||
| 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 | |||
| 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 | |||
| 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 | |||
| 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 | |||
| 455 | function drawLabels() { |
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| 456 | |||
| 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 | |||
| 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 | |||
| 469 | return true; |
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| 470 | |||
| 471 | function drawLabel(slice, startAngle, index) { |
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| 472 | |||
| 473 | if (slice.data[0][1] == 0) { |
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| 474 | return true; |
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| 475 | } |
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| 476 | |||
| 477 | // format label text |
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| 478 | |||
| 479 | var lf = options.legend.labelFormatter, text, plf = options.series.pie.label.formatter; |
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| 480 | |||
| 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 | |||
| 487 | if (plf) { |
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| 488 | text = plf(text, slice); |
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| 489 | } |
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| 490 | |||
| 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 | |||
| 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 | |||
| 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 | |||
| 502 | label.css("top", labelTop); |
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| 503 | label.css("left", labelLeft); |
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| 504 | |||
| 505 | // check to make sure that the label is not outside the canvas |
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| 506 | |||
| 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 | |||
| 511 | if (options.series.pie.label.background.opacity != 0) { |
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| 512 | |||
| 513 | // put in the transparent background separately to avoid blended labels and label boxes |
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| 514 | |||
| 515 | var c = options.series.pie.label.background.color; |
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| 516 | |||
| 517 | if (c == null) { |
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| 518 | c = slice.color; |
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| 519 | } |
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| 520 | |||
| 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 | |||
| 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 | |||
| 533 | // Placed here because it needs to be accessed from multiple locations |
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| 534 | |||
| 535 | function drawDonutHole(layer) { |
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| 536 | if (options.series.pie.innerRadius > 0) { |
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| 537 | |||
| 538 | // subtract the center |
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| 539 | |||
| 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 | |||
| 550 | // add inner stroke |
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| 551 | |||
| 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 | |||
| 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 | |||
| 564 | //-- Additional Interactive related functions -- |
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| 565 | |||
| 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 | |||
| 574 | function findNearbySlice(mouseX, mouseY) { |
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| 575 | |||
| 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 | |||
| 581 | for (var i = 0; i < slices.length; ++i) { |
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| 582 | |||
| 583 | var s = slices[i]; |
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| 584 | |||
| 585 | if (s.pie.show) { |
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| 586 | |||
| 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 | |||
| 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 { |
||
| 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 |
||
| 605 | }; |
||
| 606 | } |
||
| 607 | } else { |
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| 608 | |||
| 609 | // excanvas for IE doesn;t support isPointInPath, this is a workaround. |
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| 610 | |||
| 611 | var p1X = radius * Math.cos(s.startAngle), |
||
| 612 | p1Y = radius * Math.sin(s.startAngle), |
||
| 613 | p2X = radius * Math.cos(s.startAngle + s.angle / 4), |
||
| 614 | p2Y = radius * Math.sin(s.startAngle + s.angle / 4), |
||
| 615 | p3X = radius * Math.cos(s.startAngle + s.angle / 2), |
||
| 616 | p3Y = radius * Math.sin(s.startAngle + s.angle / 2), |
||
| 617 | p4X = radius * Math.cos(s.startAngle + s.angle / 1.5), |
||
| 618 | p4Y = radius * Math.sin(s.startAngle + s.angle / 1.5), |
||
| 619 | p5X = radius * Math.cos(s.startAngle + s.angle), |
||
| 620 | p5Y = radius * Math.sin(s.startAngle + s.angle), |
||
| 621 | arrPoly = [[0, 0], [p1X, p1Y], [p2X, p2Y], [p3X, p3Y], [p4X, p4Y], [p5X, p5Y]], |
||
| 622 | arrPoint = [x, y]; |
||
| 623 | |||
| 624 | // TODO: perhaps do some mathmatical trickery here with the Y-coordinate to compensate for pie tilt? |
||
| 625 | |||
| 626 | if (isPointInPoly(arrPoly, arrPoint)) { |
||
| 627 | ctx.restore(); |
||
| 628 | return { |
||
| 629 | datapoint: [s.percent, s.data], |
||
| 630 | dataIndex: 0, |
||
| 631 | series: s, |
||
| 632 | seriesIndex: i |
||
| 633 | }; |
||
| 634 | } |
||
| 635 | } |
||
| 636 | |||
| 637 | ctx.restore(); |
||
| 638 | } |
||
| 639 | } |
||
| 640 | |||
| 641 | return null; |
||
| 642 | } |
||
| 643 | |||
| 644 | function onMouseMove(e) { |
||
| 645 | triggerClickHoverEvent("plothover", e); |
||
| 646 | } |
||
| 647 | |||
| 648 | function onClick(e) { |
||
| 649 | triggerClickHoverEvent("plotclick", e); |
||
| 650 | } |
||
| 651 | |||
| 652 | // trigger click or hover event (they send the same parameters so we share their code) |
||
| 653 | |||
| 654 | function triggerClickHoverEvent(eventname, e) { |
||
| 655 | |||
| 656 | var offset = plot.offset(); |
||
| 657 | var canvasX = parseInt(e.pageX - offset.left); |
||
| 658 | var canvasY = parseInt(e.pageY - offset.top); |
||
| 659 | var item = findNearbySlice(canvasX, canvasY); |
||
| 660 | |||
| 661 | if (options.grid.autoHighlight) { |
||
| 662 | |||
| 663 | // clear auto-highlights |
||
| 664 | |||
| 665 | for (var i = 0; i < highlights.length; ++i) { |
||
| 666 | var h = highlights[i]; |
||
| 667 | if (h.auto == eventname && !(item && h.series == item.series)) { |
||
| 668 | unhighlight(h.series); |
||
| 669 | } |
||
| 670 | } |
||
| 671 | } |
||
| 672 | |||
| 673 | // highlight the slice |
||
| 674 | |||
| 675 | if (item) { |
||
| 676 | highlight(item.series, eventname); |
||
| 677 | } |
||
| 678 | |||
| 679 | // trigger any hover bind events |
||
| 680 | |||
| 681 | var pos = { pageX: e.pageX, pageY: e.pageY }; |
||
| 682 | target.trigger(eventname, [pos, item]); |
||
| 683 | } |
||
| 684 | |||
| 685 | function highlight(s, auto) { |
||
| 686 | //if (typeof s == "number") { |
||
| 687 | // s = series[s]; |
||
| 688 | //} |
||
| 689 | |||
| 690 | var i = indexOfHighlight(s); |
||
| 691 | |||
| 692 | if (i == -1) { |
||
| 693 | highlights.push({ series: s, auto: auto }); |
||
| 694 | plot.triggerRedrawOverlay(); |
||
| 695 | } else if (!auto) { |
||
| 696 | highlights[i].auto = false; |
||
| 697 | } |
||
| 698 | } |
||
| 699 | |||
| 700 | function unhighlight(s) { |
||
| 701 | if (s == null) { |
||
| 702 | highlights = []; |
||
| 703 | plot.triggerRedrawOverlay(); |
||
| 704 | } |
||
| 705 | |||
| 706 | //if (typeof s == "number") { |
||
| 707 | // s = series[s]; |
||
| 708 | //} |
||
| 709 | |||
| 710 | var i = indexOfHighlight(s); |
||
| 711 | |||
| 712 | if (i != -1) { |
||
| 713 | highlights.splice(i, 1); |
||
| 714 | plot.triggerRedrawOverlay(); |
||
| 715 | } |
||
| 716 | } |
||
| 717 | |||
| 718 | function indexOfHighlight(s) { |
||
| 719 | for (var i = 0; i < highlights.length; ++i) { |
||
| 720 | var h = highlights[i]; |
||
| 721 | if (h.series == s) |
||
| 722 | return i; |
||
| 723 | } |
||
| 724 | return -1; |
||
| 725 | } |
||
| 726 | |||
| 727 | function drawOverlay(plot, octx) { |
||
| 728 | |||
| 729 | var options = plot.getOptions(); |
||
| 730 | |||
| 731 | var radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius; |
||
| 732 | |||
| 733 | octx.save(); |
||
| 734 | octx.translate(centerLeft, centerTop); |
||
| 735 | octx.scale(1, options.series.pie.tilt); |
||
| 736 | |||
| 737 | for (var i = 0; i < highlights.length; ++i) { |
||
| 738 | drawHighlight(highlights[i].series); |
||
| 739 | } |
||
| 740 | |||
| 741 | drawDonutHole(octx); |
||
| 742 | |||
| 743 | octx.restore(); |
||
| 744 | |||
| 745 | function drawHighlight(series) { |
||
| 746 | |||
| 747 | if (series.angle <= 0 || isNaN(series.angle)) { |
||
| 748 | return; |
||
| 749 | } |
||
| 750 | |||
| 751 | //octx.fillStyle = parseColor(options.series.pie.highlight.color).scale(null, null, null, options.series.pie.highlight.opacity).toString(); |
||
| 752 | octx.fillStyle = "rgba(255, 255, 255, " + options.series.pie.highlight.opacity + ")"; // this is temporary until we have access to parseColor |
||
| 753 | octx.beginPath(); |
||
| 754 | if (Math.abs(series.angle - Math.PI * 2) > 0.000000001) { |
||
| 755 | octx.moveTo(0, 0); // Center of the pie |
||
| 756 | } |
||
| 757 | octx.arc(0, 0, radius, series.startAngle, series.startAngle + series.angle / 2, false); |
||
| 758 | octx.arc(0, 0, radius, series.startAngle + series.angle / 2, series.startAngle + series.angle, false); |
||
| 759 | octx.closePath(); |
||
| 760 | octx.fill(); |
||
| 761 | } |
||
| 762 | } |
||
| 763 | } // end init (plugin body) |
||
| 764 | |||
| 821 |
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