123 lines
4.3 KiB
Plaintext
123 lines
4.3 KiB
Plaintext
// TODO minAngle
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define(function (require) {
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var numberUtil = require('../../util/number');
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var parsePercent = numberUtil.parsePercent;
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var labelLayout = require('./labelLayout');
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var zrUtil = require('zrender/core/util');
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var PI2 = Math.PI * 2;
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var RADIAN = Math.PI / 180;
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return function (seriesType, ecModel, api) {
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ecModel.eachSeriesByType(seriesType, function (seriesModel) {
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var center = seriesModel.get('center');
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var radius = seriesModel.get('radius');
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if (!zrUtil.isArray(radius)) {
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radius = [0, radius];
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}
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if (!zrUtil.isArray(center)) {
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center = [center, center];
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}
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var width = api.getWidth();
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var height = api.getHeight();
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var size = Math.min(width, height);
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var cx = parsePercent(center[0], width);
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var cy = parsePercent(center[1], height);
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var r0 = parsePercent(radius[0], size / 2);
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var r = parsePercent(radius[1], size / 2);
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var data = seriesModel.getData();
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var startAngle = -seriesModel.get('startAngle') * RADIAN;
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var minAngle = seriesModel.get('minAngle') * RADIAN;
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var sum = data.getSum('value');
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// Sum may be 0
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var unitRadian = Math.PI / (sum || data.count()) * 2;
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var clockwise = seriesModel.get('clockwise');
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var roseType = seriesModel.get('roseType');
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// [0...max]
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var extent = data.getDataExtent('value');
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extent[0] = 0;
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// In the case some sector angle is smaller than minAngle
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var restAngle = PI2;
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var valueSumLargerThanMinAngle = 0;
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var currentAngle = startAngle;
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var dir = clockwise ? 1 : -1;
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data.each('value', function (value, idx) {
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var angle;
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// FIXME 兼容 2.0 但是 roseType 是 area 的时候才是这样？
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if (roseType !== 'area') {
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angle = sum === 0 ? unitRadian : (value * unitRadian);
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}
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else {
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angle = PI2 / (data.count() || 1);
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}
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if (angle < minAngle) {
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angle = minAngle;
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restAngle -= minAngle;
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}
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else {
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valueSumLargerThanMinAngle += value;
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}
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var endAngle = currentAngle + dir * angle;
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data.setItemLayout(idx, {
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angle: angle,
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startAngle: currentAngle,
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endAngle: endAngle,
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clockwise: clockwise,
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cx: cx,
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cy: cy,
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r0: r0,
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r: roseType
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? numberUtil.linearMap(value, extent, [r0, r])
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: r
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});
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currentAngle = endAngle;
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}, true);
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// Some sector is constrained by minAngle
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// Rest sectors needs recalculate angle
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if (restAngle < PI2) {
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// Average the angle if rest angle is not enough after all angles is
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// Constrained by minAngle
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if (restAngle <= 1e-3) {
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var angle = PI2 / data.count();
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data.each(function (idx) {
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var layout = data.getItemLayout(idx);
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layout.startAngle = startAngle + dir * idx * angle;
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layout.endAngle = startAngle + dir * (idx + 1) * angle;
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});
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}
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else {
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unitRadian = restAngle / valueSumLargerThanMinAngle;
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currentAngle = startAngle;
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data.each('value', function (value, idx) {
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var layout = data.getItemLayout(idx);
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var angle = layout.angle === minAngle
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? minAngle : value * unitRadian;
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layout.startAngle = currentAngle;
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layout.endAngle = currentAngle + dir * angle;
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currentAngle += angle;
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});
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}
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}
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labelLayout(seriesModel, r, width, height);
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});
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};
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}); |