mirror of
https://github.com/scratchfoundation/paper.js.git
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93 lines
2.1 KiB
JavaScript
93 lines
2.1 KiB
JavaScript
/*
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* Paper.js
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*
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* This file is part of Paper.js, a JavaScript Vector Graphics Library,
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* based on Scriptographer.org and designed to be largely API compatible.
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* http://paperjs.org/
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* http://scriptographer.org/
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*
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* Copyright (c) 2011, Juerg Lehni & Jonathan Puckey
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* http://lehni.org/ & http://jonathanpuckey.com/
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*
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* Distributed under the MIT license. See LICENSE file for details.
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*
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* All rights reserved.
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*/
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/**
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* @name SegmentPoint
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* @class An internal version of Point that notifies its segment of each change
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* Note: This prototype is not exported.
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*
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* @private
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*/
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var SegmentPoint = Point.extend({
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set: function(x, y) {
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this._x = x;
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this._y = y;
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this._owner._changed(this);
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return this;
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},
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getX: function() {
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return this._x;
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},
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setX: function(x) {
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this._x = x;
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this._owner._changed(this);
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},
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getY: function() {
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return this._y;
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},
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setY: function(y) {
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this._y = y;
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this._owner._changed(this);
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},
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isZero: function() {
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// Provide our own version of Point#isZero() that does not use the x / y
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// accessors but the internal properties directly, for performance
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// reasons, since it is used a lot internally.
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return this._x == 0 && this._y == 0;
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},
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setSelected: function(selected) {
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this._owner._setSelected(this, selected);
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},
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isSelected: function() {
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return this._owner._isSelected(this);
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},
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statics: {
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create: function(segment, key, pt) {
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var point = new SegmentPoint(SegmentPoint.dont),
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x, y, selected;
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if (!pt) {
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x = y = 0;
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} else if ((x = pt[0]) !== undefined) { // Array-like
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y = pt[1];
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} else {
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// If not Point-like already, read Point from pt = 3rd argument
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if ((x = pt.x) === undefined) {
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pt = Point.read(arguments, 2, 1);
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x = pt.x;
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}
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y = pt.y;
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selected = pt.selected;
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}
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point._x = x;
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point._y = y;
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point._owner = segment;
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// We need to set the point on the segment before copying over the
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// selected state, as otherwise this won't actually select it.
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segment[key] = point;
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if (selected)
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point.setSelected(true);
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return point;
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}
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}
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});
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