mirror of
https://github.com/scratchfoundation/paper.js.git
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116 lines
3 KiB
JavaScript
116 lines
3 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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* Distributed under the MIT license. See LICENSE file for details.
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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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* All rights reserved.
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*/
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var PointText = this.PointText = TextItem.extend({
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/** @lends PointText# */
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beans: true,
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/**
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* Creates a point text item
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*
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* @param {Point} point the position where the text will start
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*
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* @constructs PointText
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*
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* @class A PointText item represents a piece of typography in your Paper.js
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* project which starts from a certain point and extends by the amount of
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* characters contained in it.
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*
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* Sample code:
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* <pre>
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* var text = new PointText(new Point(50, 100));
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* text.paragraphStyle.justification = 'center';
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* text.content = 'The contents of the point text';
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* text.fillColor = 'black';
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* </pre>
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*
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* @extends TextItem
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* @extends Item
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*/
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initialize: function(point) {
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this.base();
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var point = Point.read(arguments);
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this.content = '';
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this._point = LinkedPoint.create(this, 'setPoint', point.x, point.y);
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this._matrix = new Matrix().translate(point);
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},
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clone: function() {
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var copy = this._clone(new PointText(this._point));
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copy.content = this.content;
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// Use Matrix#initialize to easily copy over values.
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copy._matrix.initialize(this._matrix);
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return copy;
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},
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/**
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* The PointText's anchor point
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*
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* @type Point
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* @bean
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*/
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getPoint: function() {
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return this._point;
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},
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setPoint: function(point) {
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this._transform(new Matrix().translate(
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Point.read(arguments).subtract(this._point)));
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},
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// TODO: position should be the center point of the bounds
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// but we currently don't support bounds for PointText.
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getPosition: function() {
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return this._point;
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},
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setPosition: function(point) {
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this.setPoint.apply(this, arguments);
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},
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_transform: function(matrix, flags) {
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this._matrix.preConcatenate(matrix);
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// We need to transform the LinkedPoint, passing true for dontNotify so
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// chaning it won't trigger calls of setPoint(), leading to an endless
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// recursion.
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matrix._transformPoint(this._point, this._point, true);
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},
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draw: function(ctx) {
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if (this.content == null)
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return;
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ctx.save();
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ctx.font = this._characterStyle.fontSize + 'pt ' +
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this._characterStyle.font;
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ctx.textAlign = this._paragraphStyle.justification;
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this._matrix.applyToContext(ctx);
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var fillColor = this.getFillColor();
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var strokeColor = this.getStrokeColor();
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if (!fillColor || !strokeColor)
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ctx.globalAlpha = this.opacity;
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if (fillColor) {
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ctx.fillStyle = fillColor.getCanvasStyle(ctx);
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ctx.fillText(this.content, 0, 0);
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}
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if (strokeColor) {
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ctx.strokeStyle = strokeColor.getCanvasStyle(ctx);
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ctx.strokeText(this.content, 0, 0);
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}
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ctx.restore();
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}
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});
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