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112 lines
4.2 KiB
JavaScript
112 lines
4.2 KiB
JavaScript
/**
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* Pie charts
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*/
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$.fn.sparkline.pie = pie = createClass($.fn.sparkline._base, {
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type: 'pie',
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init: function (el, values, options, width, height) {
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var total = 0, i;
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pie._super.init.call(this, el, values, options, width, height);
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this.shapes = {}; // map shape ids to value offsets
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this.valueShapes = {}; // maps value offsets to shape ids
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this.values = values = $.map(values, Number);
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if (options.get('width') === 'auto') {
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this.width = this.height;
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}
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if (values.length > 0) {
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for (i = values.length; i--;) {
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total += values[i];
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}
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}
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this.total = total;
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this.initTarget();
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this.radius = Math.floor(Math.min(this.canvasWidth, this.canvasHeight) / 2);
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},
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getRegion: function (el, x, y) {
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var shapeid = this.target.getShapeAt(el, x, y);
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return (shapeid !== undefined && this.shapes[shapeid] !== undefined) ? this.shapes[shapeid] : undefined;
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},
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getCurrentRegionFields: function () {
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var currentRegion = this.currentRegion;
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return {
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isNull: this.values[currentRegion] === undefined,
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value: this.values[currentRegion],
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percent: this.values[currentRegion] / this.total * 100,
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color: this.options.get('sliceColors')[currentRegion % this.options.get('sliceColors').length],
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offset: currentRegion
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};
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},
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changeHighlight: function (highlight) {
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var currentRegion = this.currentRegion,
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newslice = this.renderSlice(currentRegion, highlight),
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shapeid = this.valueShapes[currentRegion];
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delete this.shapes[shapeid];
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this.target.replaceWithShape(shapeid, newslice);
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this.valueShapes[currentRegion] = newslice.id;
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this.shapes[newslice.id] = currentRegion;
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},
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renderSlice: function (valuenum, highlight) {
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var target = this.target,
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options = this.options,
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radius = this.radius,
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borderWidth = options.get('borderWidth'),
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offset = options.get('offset'),
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circle = 2 * Math.PI,
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values = this.values,
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total = this.total,
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next = offset ? (2*Math.PI)*(offset/360) : 0,
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start, end, i, vlen, color;
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vlen = values.length;
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for (i = 0; i < vlen; i++) {
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start = next;
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end = next;
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if (total > 0) { // avoid divide by zero
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end = next + (circle * (values[i] / total));
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}
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if (valuenum === i) {
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color = options.get('sliceColors')[i % options.get('sliceColors').length];
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if (highlight) {
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color = this.calcHighlightColor(color, options);
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}
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return target.drawPieSlice(radius, radius, radius - borderWidth, start, end, undefined, color);
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}
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next = end;
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}
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},
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render: function () {
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var target = this.target,
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values = this.values,
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options = this.options,
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radius = this.radius,
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borderWidth = options.get('borderWidth'),
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shape, i;
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if (!pie._super.render.call(this)) {
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return;
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}
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if (borderWidth) {
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target.drawCircle(radius, radius, Math.floor(radius - (borderWidth / 2)),
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options.get('borderColor'), undefined, borderWidth).append();
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}
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for (i = values.length; i--;) {
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if (values[i]) { // don't render zero values
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shape = this.renderSlice(i).append();
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this.valueShapes[i] = shape.id; // store just the shapeid
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this.shapes[shape.id] = i;
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}
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}
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target.render();
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}
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});
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