93 lines
2.1 KiB
Java
93 lines
2.1 KiB
Java
var Util = require('../util/index');
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var Shape = require('../core/shape');
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var Arrow = require('./util/arrow');
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var LineMath = require('./math/line');
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var Line = function Line(cfg) {
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Line.superclass.constructor.call(this, cfg);
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};
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Line.ATTRS = {
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x1: 0,
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y1: 0,
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x2: 0,
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y2: 0,
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lineWidth: 1,
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startArrow: false,
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endArrow: false
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};
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Util.extend(Line, Shape);
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Util.augment(Line, {
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canStroke: true,
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type: 'line',
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getDefaultAttrs: function getDefaultAttrs() {
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return {
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lineWidth: 1,
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startArrow: false,
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endArrow: false
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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 x1 = attrs.x1,
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y1 = attrs.y1,
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x2 = attrs.x2,
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y2 = attrs.y2;
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var lineWidth = this.getHitLineWidth();
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return LineMath.box(x1, y1, x2, y2, lineWidth);
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},
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createPath: function createPath(context) {
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var self = this;
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var attrs = this._attrs;
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var x1 = attrs.x1,
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y1 = attrs.y1,
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x2 = attrs.x2,
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y2 = attrs.y2; // 如果定义了箭头，并且是自定义箭头，线条相应缩进
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if (attrs.startArrow && attrs.startArrow.d) {
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var dist = Arrow.getShortenOffset(x1, y1, x2, y2, attrs.startArrow.d);
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x1 += dist.dx;
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y1 += dist.dy;
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}
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if (attrs.endArrow && attrs.endArrow.d) {
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var _dist = Arrow.getShortenOffset(x1, y1, x2, y2, attrs.endArrow.d);
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x2 -= _dist.dx;
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y2 -= _dist.dy;
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}
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context = context || self.get('context');
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context.beginPath();
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context.moveTo(x1, y1);
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context.lineTo(x2, y2);
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},
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afterPath: function afterPath(context) {
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var self = this;
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var attrs = self._attrs;
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var x1 = attrs.x1,
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y1 = attrs.y1,
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x2 = attrs.x2,
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y2 = attrs.y2;
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context = context || self.get('context');
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if (attrs.startArrow) {
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Arrow.addStartArrow(context, attrs, x2, y2, x1, y1);
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}
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if (attrs.endArrow) {
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Arrow.addEndArrow(context, attrs, x1, y1, x2, y2);
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}
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},
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getPoint: function getPoint(t) {
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var attrs = this._attrs;
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return {
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x: LineMath.at(attrs.x1, attrs.x2, t),
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y: LineMath.at(attrs.y1, attrs.y2, t)
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};
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}
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});
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module.exports = Line; |