1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 | /** * Pie * * Formats the pies labels. * @param {Object} slice - Slice object * @return {String} Formatted pie label string */ (function () { var _ = Flotr._; Flotr.defaultPieLabelFormatter = function (total, value) { return (100 * value / total).toFixed(2)+'%'; }; Flotr.addType('pie', { options: { show: false, // => setting to true will show bars, false will hide lineWidth: 1, // => in pixels fill: true, // => true to fill the area from the line to the x axis, false for (transparent) no fill fillColor: null, // => fill color fillOpacity: 0.6, // => opacity of the fill color, set to 1 for a solid fill, 0 hides the fill explode: 6, // => the number of pixels the splices will be far from the center sizeRatio: 0.6, // => the size ratio of the pie relative to the plot startAngle: Math.PI/4, // => the first slice start angle labelFormatter: Flotr.defaultPieLabelFormatter, pie3D: false, // => whether to draw the pie in 3 dimenstions or not (ineffective) pie3DviewAngle: (Math.PI/2 * 0.8), pie3DspliceThickness: 20, epsilon: 0.1 // => how close do you have to get to hit empty slice }, draw : function (options) { // TODO 3D charts what? var data = options.data, context = options.context, canvas = context.canvas, lineWidth = options.lineWidth, shadowSize = options.shadowSize, sizeRatio = options.sizeRatio, height = options.height, width = options.width, explode = options.explode, color = options.color, fill = options.fill, fillStyle = options.fillStyle, radius = Math.min(canvas.width, canvas.height) * sizeRatio / 2, value = data[0][1], html = [], vScale = 1,//Math.cos(series.pie.viewAngle); measure = Math.PI * 2 * value / this.total, startAngle = this.startAngle || (2 * Math.PI * options.startAngle), // TODO: this initial startAngle is already in radians (fixing will be test-unstable) endAngle = startAngle + measure, bisection = startAngle + measure / 2, label = options.labelFormatter(this.total, value), //plotTickness = Math.sin(series.pie.viewAngle)*series.pie.spliceThickness / vScale; explodeCoeff = explode + radius + 4, distX = Math.cos(bisection) * explodeCoeff, distY = Math.sin(bisection) * explodeCoeff, textAlign = distX < 0 ? 'right' : 'left', textBaseline = distY > 0 ? 'top' : 'bottom', style, x, y; context.save(); context.translate(width / 2, height / 2); context.scale(1, vScale); x = Math.cos(bisection) * explode; y = Math.sin(bisection) * explode; // Shadows if (shadowSize > 0) { this.plotSlice(x + shadowSize, y + shadowSize, radius, startAngle, endAngle, context); if (fill) { context.fillStyle = 'rgba(0,0,0,0.1)'; context.fill(); } } this.plotSlice(x, y, radius, startAngle, endAngle, context); if (fill) { context.fillStyle = fillStyle; context.fill(); } context.lineWidth = lineWidth; context.strokeStyle = color; context.stroke(); style = { size : options.fontSize * 1.2, color : options.fontColor, weight : 1.5 }; if (label) { if (options.htmlText || !options.textEnabled) { divStyle = 'position:absolute;' + textBaseline + ':' + (height / 2 + (textBaseline === 'top' ? distY : -distY)) + 'px;'; divStyle += textAlign + ':' + (width / 2 + (textAlign === 'right' ? -distX : distX)) + 'px;'; html.push('<div style="', divStyle, '" class="flotr-grid-label">', label, '</div>'); } else { style.textAlign = textAlign; style.textBaseline = textBaseline; Flotr.drawText(context, label, distX, distY, style); } } if (options.htmlText || !options.textEnabled) { var div = Flotr.DOM.node('<div style="color:' + options.fontColor + '" class="flotr-labels"></div>'); Flotr.DOM.insert(div, html.join('')); Flotr.DOM.insert(options.element, div); } context.restore(); // New start angle this.startAngle = endAngle; this.slices = this.slices || []; this.slices.push({ radius : Math.min(canvas.width, canvas.height) * sizeRatio / 2, x : x, y : y, explode : explode, start : startAngle, end : endAngle }); }, plotSlice : function (x, y, radius, startAngle, endAngle, context) { context.beginPath(); context.moveTo(x, y); context.arc(x, y, radius, startAngle, endAngle, false); context.lineTo(x, y); context.closePath(); }, hit : function (options) { var data = options.data[0], args = options.args, index = options.index, mouse = args[0], n = args[1], slice = this.slices[index], x = mouse.relX - options.width / 2, y = mouse.relY - options.height / 2, r = Math.sqrt(x * x + y * y), theta = Math.atan(y / x), circle = Math.PI * 2, explode = slice.explode || options.explode, start = slice.start % circle, end = slice.end % circle, epsilon = options.epsilon; if (x < 0) { theta += Math.PI; } else if (x > 0 && y < 0) { theta += circle; } if (r < slice.radius + explode && r > explode) { if ( (theta > start && theta < end) || // Normal Slice (start > end && (theta < end || theta > start)) || // First slice // TODO: Document the two cases at the end: (start === end && ((slice.start === slice.end && Math.abs(theta - start) < epsilon) || (slice.start !== slice.end && Math.abs(theta-start) > epsilon))) ) { // TODO Decouple this from hit plugin (chart shouldn't know what n means) n.x = data[0]; n.y = data[1]; n.sAngle = start; n.eAngle = end; n.index = 0; n.seriesIndex = index; n.fraction = data[1] / this.total; } } }, drawHit: function (options) { var context = options.context, slice = this.slices[options.args.seriesIndex]; context.save(); context.translate(options.width / 2, options.height / 2); this.plotSlice(slice.x, slice.y, slice.radius, slice.start, slice.end, context); context.stroke(); context.restore(); }, clearHit : function (options) { var context = options.context, slice = this.slices[options.args.seriesIndex], padding = 2 * options.lineWidth, radius = slice.radius + padding; context.save(); context.translate(options.width / 2, options.height / 2); context.clearRect( slice.x - radius, slice.y - radius, 2 * radius + padding, 2 * radius + padding ); context.restore(); }, extendYRange : function (axis, data) { this.total = (this.total || 0) + data[0][1]; } }); })(); |