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66 lines
2.8 KiB
66 lines
2.8 KiB
/**
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* Discrete charts
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*/
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$.fn.sparkline.discrete = discrete = createClass($.fn.sparkline._base, barHighlightMixin, {
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type: 'discrete',
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init: function (el, values, options, width, height) {
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discrete._super.init.call(this, el, values, options, width, height);
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this.regionShapes = {};
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this.values = values = $.map(values, Number);
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this.min = Math.min.apply(Math, values);
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this.max = Math.max.apply(Math, values);
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this.range = this.max - this.min;
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this.width = width = options.get('width') === 'auto' ? values.length * 2 : this.width;
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this.interval = Math.floor(width / values.length);
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this.itemWidth = width / values.length;
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if (options.get('chartRangeMin') !== undefined && (options.get('chartRangeClip') || options.get('chartRangeMin') < this.min)) {
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this.min = options.get('chartRangeMin');
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}
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if (options.get('chartRangeMax') !== undefined && (options.get('chartRangeClip') || options.get('chartRangeMax') > this.max)) {
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this.max = options.get('chartRangeMax');
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}
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this.initTarget();
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if (this.target) {
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this.lineHeight = options.get('lineHeight') === 'auto' ? Math.round(this.canvasHeight * 0.3) : options.get('lineHeight');
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}
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},
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getRegion: function (el, x, y) {
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return Math.floor(x / this.itemWidth);
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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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offset: currentRegion
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};
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},
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renderRegion: function (valuenum, highlight) {
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var values = this.values,
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options = this.options,
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min = this.min,
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max = this.max,
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range = this.range,
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interval = this.interval,
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target = this.target,
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canvasHeight = this.canvasHeight,
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lineHeight = this.lineHeight,
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pheight = canvasHeight - lineHeight,
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ytop, val, color, x;
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val = clipval(values[valuenum], min, max);
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x = valuenum * interval;
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ytop = Math.round(pheight - pheight * ((val - min) / range));
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color = (options.get('thresholdColor') && val < options.get('thresholdValue')) ? options.get('thresholdColor') : options.get('lineColor');
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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.drawLine(x, ytop, x, ytop + lineHeight, color);
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}
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});
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