63 lines
1.5 KiB
Java
63 lines
1.5 KiB
Java
var Util = require('../util/index');
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var Shape = require('../core/shape');
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var Ellipse = function Ellipse(cfg) {
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Ellipse.superclass.constructor.call(this, cfg);
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};
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Ellipse.ATTRS = {
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x: 0,
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y: 0,
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rx: 1,
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ry: 1,
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lineWidth: 1
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};
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Util.extend(Ellipse, Shape);
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Util.augment(Ellipse, {
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canFill: true,
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canStroke: true,
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type: 'ellipse',
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getDefaultAttrs: function getDefaultAttrs() {
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return {
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lineWidth: 1
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};
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},
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calculateBox: function calculateBox() {
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var attrs = this._attrs;
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var cx = attrs.x;
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var cy = attrs.y;
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var rx = attrs.rx;
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var ry = attrs.ry;
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var lineWidth = this.getHitLineWidth();
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var halfXWidth = rx + lineWidth / 2;
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var halfYWidth = ry + lineWidth / 2;
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return {
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minX: cx - halfXWidth,
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minY: cy - halfYWidth,
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maxX: cx + halfXWidth,
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maxY: cy + halfYWidth
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};
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},
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createPath: function createPath(context) {
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var attrs = this._attrs;
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var cx = attrs.x;
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var cy = attrs.y;
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var rx = attrs.rx;
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var ry = attrs.ry;
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context = context || self.get('context');
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var r = rx > ry ? rx : ry;
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var scaleX = rx > ry ? 1 : rx / ry;
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var scaleY = rx > ry ? ry / rx : 1;
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var m = [1, 0, 0, 0, 1, 0, 0, 0, 1];
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Util.mat3.scale(m, m, [scaleX, scaleY]);
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Util.mat3.translate(m, m, [cx, cy]);
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context.beginPath();
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context.save();
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context.transform(m[0], m[1], m[3], m[4], m[6], m[7]);
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context.arc(0, 0, r, 0, Math.PI * 2);
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context.restore();
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context.closePath();
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}
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});
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module.exports = Ellipse; |