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1 /** 2 * jqPlot 3 * Pure JavaScript plotting plugin using jQuery 4 * 5 * Version: 1.0.2 6 * Revision: 1108 7 * 8 * Copyright (c) 2009-2011 Chris Leonello 9 * jqPlot is currently available for use in all personal or commercial projects 10 * under both the MIT (http://www.opensource.org/licenses/mit-license.php) and GPL 11 * version 2.0 (http://www.gnu.org/licenses/gpl-2.0.html) licenses. This means that you can 12 * choose the license that best suits your project and use it accordingly. 13 * 14 * Although not required, the author would appreciate an email letting him 15 * know of any substantial use of jqPlot. You can reach the author at: 16 * chris at jqplot dot com or see http://www.jqplot.com/info.php . 17 * 18 * If you are feeling kind and generous, consider supporting the project by 19 * making a donation at: http://www.jqplot.com/donate.php . 20 * 21 * sprintf functions contained in jqplot.sprintf.js by Ash Searle: 22 * 23 * version 2007.04.27 24 * author Ash Searle 25 * http://hexmen.com/blog/2007/03/printf-sprintf/ 26 * http://hexmen.com/js/sprintf.js 27 * The author (Ash Searle) has placed this code in the public domain: 28 * "This code is unrestricted: you are free to use it however you like." 29 * 30 */ 31 (function($) { 32 33 /** 34 * Class: $.jqplot.PointLabels 35 * Plugin for putting labels at the data points. 36 * 37 * To use this plugin, include the js 38 * file in your source: 39 * 40 * > <script type="text/javascript" src="plugins/jqplot.pointLabels.js"></script> 41 * 42 * By default, the last value in the data ponit array in the data series is used 43 * for the label. For most series renderers, extra data can be added to the 44 * data point arrays and the last value will be used as the label. 45 * 46 * For instance, 47 * this series: 48 * 49 * > [[1,4], [3,5], [7,2]] 50 * 51 * Would, by default, use the y values in the labels. 52 * Extra data can be added to the series like so: 53 * 54 * > [[1,4,'mid'], [3 5,'hi'], [7,2,'low']] 55 * 56 * And now the point labels would be 'mid', 'low', and 'hi'. 57 * 58 * Options to the point labels and a custom labels array can be passed into the 59 * "pointLabels" option on the series option like so: 60 * 61 * > series:[{pointLabels:{ 62 * > labels:['mid', 'hi', 'low'], 63 * > location:'se', 64 * > ypadding: 12 65 * > } 66 * > }] 67 * 68 * A custom labels array in the options takes precendence over any labels 69 * in the series data. If you have a custom labels array in the options, 70 * but still want to use values from the series array as labels, set the 71 * "labelsFromSeries" option to true. 72 * 73 * By default, html entities (<, >, etc.) are escaped in point labels. 74 * If you want to include actual html markup in the labels, 75 * set the "escapeHTML" option to false. 76 * 77 */ 78 $.jqplot.PointLabels = function(options) { 79 // Group: Properties 80 // 81 // prop: show 82 // show the labels or not. 83 this.show = $.jqplot.config.enablePlugins; 84 // prop: location 85 // compass location where to position the label around the point. 86 // 'n', 'ne', 'e', 'se', 's', 'sw', 'w', 'nw' 87 this.location = 'n'; 88 // prop: labelsFromSeries 89 // true to use labels within data point arrays. 90 this.labelsFromSeries = false; 91 // prop: seriesLabelIndex 92 // array index for location of labels within data point arrays. 93 // if null, will use the last element of the data point array. 94 this.seriesLabelIndex = null; 95 // prop: labels 96 // array of arrays of labels, one array for each series. 97 this.labels = []; 98 // actual labels that will get displayed. 99 // needed to preserve user specified labels in labels array. 100 this._labels = []; 101 // prop: stackedValue 102 // true to display value as stacked in a stacked plot. 103 // no effect if labels is specified. 104 this.stackedValue = false; 105 // prop: ypadding 106 // vertical padding in pixels between point and label 107 this.ypadding = 6; 108 // prop: xpadding 109 // horizontal padding in pixels between point and label 110 this.xpadding = 6; 111 // prop: escapeHTML 112 // true to escape html entities in the labels. 113 // If you want to include markup in the labels, set to false. 114 this.escapeHTML = true; 115 // prop: edgeTolerance 116 // Number of pixels that the label must be away from an axis 117 // boundary in order to be drawn. Negative values will allow overlap 118 // with the grid boundaries. 119 this.edgeTolerance = -5; 120 // prop: formatter 121 // A class of a formatter for the tick text. sprintf by default. 122 this.formatter = $.jqplot.DefaultTickFormatter; 123 // prop: formatString 124 // string passed to the formatter. 125 this.formatString = ''; 126 // prop: hideZeros 127 // true to not show a label for a value which is 0. 128 this.hideZeros = false; 129 this._elems = []; 130 131 $.extend(true, this, options); 132 }; 133 134 var locations = ['nw', 'n', 'ne', 'e', 'se', 's', 'sw', 'w']; 135 var locationIndicies = {'nw':0, 'n':1, 'ne':2, 'e':3, 'se':4, 's':5, 'sw':6, 'w':7}; 136 var oppositeLocations = ['se', 's', 'sw', 'w', 'nw', 'n', 'ne', 'e']; 137 138 // called with scope of a series 139 $.jqplot.PointLabels.init = function (target, data, seriesDefaults, opts, plot){ 140 var options = $.extend(true, {}, seriesDefaults, opts); 141 options.pointLabels = options.pointLabels || {}; 142 if (this.renderer.constructor === $.jqplot.BarRenderer && this.barDirection === 'horizontal' && !options.pointLabels.location) { 143 options.pointLabels.location = 'e'; 144 } 145 // add a pointLabels attribute to the series plugins 146 this.plugins.pointLabels = new $.jqplot.PointLabels(options.pointLabels); 147 this.plugins.pointLabels.setLabels.call(this); 148 }; 149 150 // called with scope of series 151 $.jqplot.PointLabels.prototype.setLabels = function() { 152 var p = this.plugins.pointLabels; 153 var labelIdx; 154 if (p.seriesLabelIndex != null) { 155 labelIdx = p.seriesLabelIndex; 156 } 157 else if (this.renderer.constructor === $.jqplot.BarRenderer && this.barDirection === 'horizontal') { 158 labelIdx = 0; 159 } 160 else { 161 labelIdx = (this._plotData.length === 0) ? 0 : this._plotData[0].length -1; 162 } 163 p._labels = []; 164 if (p.labels.length === 0 || p.labelsFromSeries) { 165 if (p.stackedValue) { 166 if (this._plotData.length && this._plotData[0].length){ 167 // var idx = p.seriesLabelIndex || this._plotData[0].length -1; 168 for (var i=0; i<this._plotData.length; i++) { 169 p._labels.push(this._plotData[i][labelIdx]); 170 } 171 } 172 } 173 else { 174 // var d = this._plotData; 175 var d = this.data; 176 if (this.renderer.constructor === $.jqplot.BarRenderer && this.waterfall) { 177 d = this._data; 178 } 179 if (d.length && d[0].length) { 180 // var idx = p.seriesLabelIndex || d[0].length -1; 181 for (var i=0; i<d.length; i++) { 182 p._labels.push(d[i][labelIdx]); 183 } 184 } 185 d = null; 186 } 187 } 188 else if (p.labels.length){ 189 p._labels = p.labels; 190 } 191 }; 192 193 $.jqplot.PointLabels.prototype.xOffset = function(elem, location, padding) { 194 location = location || this.location; 195 padding = padding || this.xpadding; 196 var offset; 197 198 switch (location) { 199 case 'nw': 200 offset = -elem.outerWidth(true) - this.xpadding; 201 break; 202 case 'n': 203 offset = -elem.outerWidth(true)/2; 204 break; 205 case 'ne': 206 offset = this.xpadding; 207 break; 208 case 'e': 209 offset = this.xpadding; 210 break; 211 case 'se': 212 offset = this.xpadding; 213 break; 214 case 's': 215 offset = -elem.outerWidth(true)/2; 216 break; 217 case 'sw': 218 offset = -elem.outerWidth(true) - this.xpadding; 219 break; 220 case 'w': 221 offset = -elem.outerWidth(true) - this.xpadding; 222 break; 223 default: // same as 'nw' 224 offset = -elem.outerWidth(true) - this.xpadding; 225 break; 226 } 227 return offset; 228 }; 229 230 $.jqplot.PointLabels.prototype.yOffset = function(elem, location, padding) { 231 location = location || this.location; 232 padding = padding || this.xpadding; 233 var offset; 234 235 switch (location) { 236 case 'nw': 237 offset = -elem.outerHeight(true) - this.ypadding; 238 break; 239 case 'n': 240 offset = -elem.outerHeight(true) - this.ypadding; 241 break; 242 case 'ne': 243 offset = -elem.outerHeight(true) - this.ypadding; 244 break; 245 case 'e': 246 offset = -elem.outerHeight(true)/2; 247 break; 248 case 'se': 249 offset = this.ypadding; 250 break; 251 case 's': 252 offset = this.ypadding; 253 break; 254 case 'sw': 255 offset = this.ypadding; 256 break; 257 case 'w': 258 offset = -elem.outerHeight(true)/2; 259 break; 260 default: // same as 'nw' 261 offset = -elem.outerHeight(true) - this.ypadding; 262 break; 263 } 264 return offset; 265 }; 266 267 // called with scope of series 268 $.jqplot.PointLabels.draw = function (sctx, options, plot) { 269 var p = this.plugins.pointLabels; 270 // set labels again in case they have changed. 271 p.setLabels.call(this); 272 // remove any previous labels 273 for (var i=0; i<p._elems.length; i++) { 274 // Memory Leaks patch 275 // p._elems[i].remove(); 276 p._elems[i].emptyForce(); 277 } 278 p._elems.splice(0, p._elems.length); 279 280 if (p.show) { 281 var ax = '_'+this._stackAxis+'axis'; 282 283 if (!p.formatString) { 284 p.formatString = this[ax]._ticks[0].formatString; 285 p.formatter = this[ax]._ticks[0].formatter; 286 } 287 288 var pd = this._plotData; 289 var ppd = this._prevPlotData; 290 var xax = this._xaxis; 291 var yax = this._yaxis; 292 var elem, helem; 293 294 for (var i=0, l=p._labels.length; i < l; i++) { 295 var label = p._labels[i]; 296 297 if (p.hideZeros && parseInt(p._labels[i], 10) == 0) { 298 label = ''; 299 } 300 301 if (label != null) { 302 label = p.formatter(p.formatString, label); 303 } 304 305 helem = document.createElement('div'); 306 p._elems[i] = $(helem); 307 308 elem = p._elems[i]; 309 310 311 elem.addClass('jqplot-point-label jqplot-series-'+this.index+' jqplot-point-'+i); 312 elem.css('position', 'absolute'); 313 elem.insertAfter(sctx.canvas); 314 315 if (p.escapeHTML) { 316 elem.text(label); 317 } 318 else { 319 elem.html(label); 320 } 321 var location = p.location; 322 if ((this.fillToZero && pd[i][1] < 0) || (this.fillToZero && this._type === 'bar' && this.barDirection === 'horizontal' && pd[i][0] < 0) || (this.waterfall && parseInt(label, 10)) < 0) { 323 location = oppositeLocations[locationIndicies[location]]; 324 } 325 326 327 var ell = xax.u2p(pd[i][0]) + p.xOffset(elem, location); 328 var elt = yax.u2p(pd[i][1]) + p.yOffset(elem, location); 329 330 // we have stacked chart but are not showing stacked values, 331 // place labels in center. 332 if (this._stack && !p.stackedValue) { 333 if (this.barDirection === "vertical") { 334 elt = (this._barPoints[i][0][1] + this._barPoints[i][1][1]) / 2 + plot._gridPadding.top - 0.5 * elem.outerHeight(true); 335 } 336 else { 337 ell = (this._barPoints[i][2][0] + this._barPoints[i][0][0]) / 2 + plot._gridPadding.left - 0.5 * elem.outerWidth(true); 338 } 339 } 340 341 if (this.renderer.constructor == $.jqplot.BarRenderer) { 342 if (this.barDirection == "vertical") { 343 ell += this._barNudge; 344 } 345 else { 346 elt -= this._barNudge; 347 } 348 } 349 elem.css('left', ell); 350 elem.css('top', elt); 351 var elr = ell + elem.width(); 352 var elb = elt + elem.height(); 353 var et = p.edgeTolerance; 354 var scl = $(sctx.canvas).position().left; 355 var sct = $(sctx.canvas).position().top; 356 var scr = sctx.canvas.width + scl; 357 var scb = sctx.canvas.height + sct; 358 // if label is outside of allowed area, remove it 359 if (ell - et < scl || elt - et < sct || elr + et > scr || elb + et > scb) { 360 elem.remove(); 361 } 362 363 elem = null; 364 helem = null; 365 } 366 367 // finally, animate them if the series is animated 368 // if (this.renderer.animation && this.renderer.animation._supported && this.renderer.animation.show && plot._drawCount < 2) { 369 // var sel = '.jqplot-point-label.jqplot-series-'+this.index; 370 // $(sel).hide(); 371 // $(sel).fadeIn(1000); 372 // } 373 374 } 375 }; 376 377 $.jqplot.postSeriesInitHooks.push($.jqplot.PointLabels.init); 378 $.jqplot.postDrawSeriesHooks.push($.jqplot.PointLabels.draw); 379 })(jQuery);
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