pixi.js/docs/files/src_pixi_text_Text.js.html
Mat Groves 847eb6c48e Docs updated
Fixed issue where alpha not being set correctly in canvas spriteBatch
Fixed issue where previous stage events did not get removed correctly
2014-01-28 00:08:50 +00:00

491 lines
17 KiB
HTML

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>src/pixi/text/Text.js - pixi.js</title>
<link rel="stylesheet" href="http://yui.yahooapis.com/3.9.1/build/cssgrids/cssgrids-min.css">
<link rel="stylesheet" href="../assets/vendor/prettify/prettify-min.css">
<link rel="stylesheet" href="../assets/css/main.css" id="site_styles">
<link rel="shortcut icon" type="image/png" href="../assets/favicon.png">
<script src="http://yui.yahooapis.com/combo?3.9.1/build/yui/yui-min.js"></script>
</head>
<body class="yui3-skin-sam">
<div id="doc">
<div id="hd" class="yui3-g header">
<div class="yui3-u-3-4">
<h1><img src="http://www.goodboydigital.com/pixijs/logo_small.png" title="pixi.js"></h1>
</div>
<div class="yui3-u-1-4 version">
<em>API Docs for: 1.4.3</em>
</div>
</div>
<div id="bd" class="yui3-g">
<div class="yui3-u-1-4">
<div id="docs-sidebar" class="sidebar apidocs">
<div id="api-list">
<h2 class="off-left">APIs</h2>
<div id="api-tabview" class="tabview">
<ul class="tabs">
<li><a href="#api-classes">Classes</a></li>
<li><a href="#api-modules">Modules</a></li>
</ul>
<div id="api-tabview-filter">
<input type="search" id="api-filter" placeholder="Type to filter APIs">
</div>
<div id="api-tabview-panel">
<ul id="api-classes" class="apis classes">
<li><a href="../classes/AbstractFilter.html">AbstractFilter</a></li>
<li><a href="../classes/AlphaMaskFilter.html">AlphaMaskFilter</a></li>
<li><a href="../classes/AssetLoader.html">AssetLoader</a></li>
<li><a href="../classes/AtlasLoader.html">AtlasLoader</a></li>
<li><a href="../classes/BaseTexture.html">BaseTexture</a></li>
<li><a href="../classes/BitmapFontLoader.html">BitmapFontLoader</a></li>
<li><a href="../classes/BitmapText.html">BitmapText</a></li>
<li><a href="../classes/BlurFilter.html">BlurFilter</a></li>
<li><a href="../classes/CanvasGraphics.html">CanvasGraphics</a></li>
<li><a href="../classes/CanvasRenderer.html">CanvasRenderer</a></li>
<li><a href="../classes/Circle.html">Circle</a></li>
<li><a href="../classes/ColorMatrixFilter.html">ColorMatrixFilter</a></li>
<li><a href="../classes/ColorStepFilter.html">ColorStepFilter</a></li>
<li><a href="../classes/DisplacementFilter.html">DisplacementFilter</a></li>
<li><a href="../classes/DisplayObject.html">DisplayObject</a></li>
<li><a href="../classes/DisplayObjectContainer.html">DisplayObjectContainer</a></li>
<li><a href="../classes/DotScreenFilter.html">DotScreenFilter</a></li>
<li><a href="../classes/Ellipse.html">Ellipse</a></li>
<li><a href="../classes/EventTarget.html">EventTarget</a></li>
<li><a href="../classes/Graphics.html">Graphics</a></li>
<li><a href="../classes/GrayFilter.html">GrayFilter</a></li>
<li><a href="../classes/ImageLoader.html">ImageLoader</a></li>
<li><a href="../classes/InvertFilter.html">InvertFilter</a></li>
<li><a href="../classes/JsonLoader.html">JsonLoader</a></li>
<li><a href="../classes/MovieClip.html">MovieClip</a></li>
<li><a href="../classes/PixelateFilter.html">PixelateFilter</a></li>
<li><a href="../classes/PIXI.PixiFastShader.html">PIXI.PixiFastShader</a></li>
<li><a href="../classes/PIXI.PixiShader.html">PIXI.PixiShader</a></li>
<li><a href="../classes/Point.html">Point</a></li>
<li><a href="../classes/Polygon.html">Polygon</a></li>
<li><a href="../classes/PolyK._convex.html">PolyK._convex</a></li>
<li><a href="../classes/PolyK._PointInTriangle.html">PolyK._PointInTriangle</a></li>
<li><a href="../classes/PolyK.AjaxRequest.html">PolyK.AjaxRequest</a></li>
<li><a href="../classes/PolyK.InteractionData.html">PolyK.InteractionData</a></li>
<li><a href="../classes/PolyK.InteractionManager.html">PolyK.InteractionManager</a></li>
<li><a href="../classes/Rectangle.html">Rectangle</a></li>
<li><a href="../classes/RenderTexture.html">RenderTexture</a></li>
<li><a href="../classes/SepiaFilter.html">SepiaFilter</a></li>
<li><a href="../classes/Spine.html">Spine</a></li>
<li><a href="../classes/Sprite.html">Sprite</a></li>
<li><a href="../classes/SpriteSheetLoader.html">SpriteSheetLoader</a></li>
<li><a href="../classes/Stage.html">Stage</a></li>
<li><a href="../classes/Text.html">Text</a></li>
<li><a href="../classes/Texture.html">Texture</a></li>
<li><a href="../classes/TilingSprite.html">TilingSprite</a></li>
<li><a href="../classes/TwistFilter.html">TwistFilter</a></li>
<li><a href="../classes/WebGLRenderer.html">WebGLRenderer</a></li>
</ul>
<ul id="api-modules" class="apis modules">
<li><a href="../modules/PIXI.html">PIXI</a></li>
</ul>
</div>
</div>
</div>
</div>
</div>
<div class="yui3-u-3-4">
<div id="api-options">
Show:
<label for="api-show-inherited">
<input type="checkbox" id="api-show-inherited" checked>
Inherited
</label>
<label for="api-show-protected">
<input type="checkbox" id="api-show-protected">
Protected
</label>
<label for="api-show-private">
<input type="checkbox" id="api-show-private">
Private
</label>
<label for="api-show-deprecated">
<input type="checkbox" id="api-show-deprecated">
Deprecated
</label>
</div>
<div class="apidocs">
<div id="docs-main">
<div class="content">
<h1 class="file-heading">File: src/pixi/text/Text.js</h1>
<div class="file">
<pre class="code prettyprint linenums">
/**
* @author Mat Groves http://matgroves.com/ @Doormat23
*/
/**
* A Text Object will create a line(s) of text. To split a line you can use &#x27;\n&#x27;
*
* @class Text
* @extends Sprite
* @constructor
* @param text {String} The copy that you would like the text to display
* @param [style] {Object} The style parameters
* @param [style.font] {String} default &#x27;bold 20pt Arial&#x27; The style and size of the font
* @param [style.fill=&#x27;black&#x27;] {Object} A canvas fillstyle that will be used on the text eg &#x27;red&#x27;, &#x27;#00FF00&#x27;
* @param [style.align=&#x27;left&#x27;] {String} Alignment for multiline text (&#x27;left&#x27;, &#x27;center&#x27; or &#x27;right&#x27;), does not affect single line text
* @param [style.stroke] {String} A canvas fillstyle that will be used on the text stroke eg &#x27;blue&#x27;, &#x27;#FCFF00&#x27;
* @param [style.strokeThickness=0] {Number} A number that represents the thickness of the stroke. Default is 0 (no stroke)
* @param [style.wordWrap=false] {Boolean} Indicates if word wrap should be used
* @param [style.wordWrapWidth=100] {Number} The width at which text will wrap
*/
PIXI.Text = function(text, style)
{
this.canvas = document.createElement(&#x27;canvas&#x27;);
this.context = this.canvas.getContext(&#x27;2d&#x27;);
PIXI.Sprite.call(this, PIXI.Texture.fromCanvas(this.canvas));
this.setText(text);
this.setStyle(style);
this.updateText();
this.dirty = false;
};
// constructor
PIXI.Text.prototype = Object.create(PIXI.Sprite.prototype);
PIXI.Text.prototype.constructor = PIXI.Text;
/**
* Set the style of the text
*
* @method setStyle
* @param [style] {Object} The style parameters
* @param [style.font=&#x27;bold 20pt Arial&#x27;] {String} The style and size of the font
* @param [style.fill=&#x27;black&#x27;] {Object} A canvas fillstyle that will be used on the text eg &#x27;red&#x27;, &#x27;#00FF00&#x27;
* @param [style.align=&#x27;left&#x27;] {String} Alignment for multiline text (&#x27;left&#x27;, &#x27;center&#x27; or &#x27;right&#x27;), does not affect single line text
* @param [style.stroke=&#x27;black&#x27;] {String} A canvas fillstyle that will be used on the text stroke eg &#x27;blue&#x27;, &#x27;#FCFF00&#x27;
* @param [style.strokeThickness=0] {Number} A number that represents the thickness of the stroke. Default is 0 (no stroke)
* @param [style.wordWrap=false] {Boolean} Indicates if word wrap should be used
* @param [style.wordWrapWidth=100] {Number} The width at which text will wrap
*/
PIXI.Text.prototype.setStyle = function(style)
{
style = style || {};
style.font = style.font || &#x27;bold 20pt Arial&#x27;;
style.fill = style.fill || &#x27;black&#x27;;
style.align = style.align || &#x27;left&#x27;;
style.stroke = style.stroke || &#x27;black&#x27;; //provide a default, see: https://github.com/GoodBoyDigital/pixi.js/issues/136
style.strokeThickness = style.strokeThickness || 0;
style.wordWrap = style.wordWrap || false;
style.wordWrapWidth = style.wordWrapWidth || 100;
this.style = style;
this.dirty = true;
};
/**
* Set the copy for the text object. To split a line you can use &#x27;\n&#x27;
*
* @method setText
* @param {String} text The copy that you would like the text to display
*/
PIXI.Text.prototype.setText = function(text)
{
this.text = text.toString() || &#x27; &#x27;;
this.dirty = true;
};
/**
* Renders text
*
* @method updateText
* @private
*/
PIXI.Text.prototype.updateText = function()
{
this.context.font = this.style.font;
var outputText = this.text;
// word wrap
// preserve original text
if(this.style.wordWrap)outputText = this.wordWrap(this.text);
//split text into lines
var lines = outputText.split(/(?:\r\n|\r|\n)/);
//calculate text width
var lineWidths = [];
var maxLineWidth = 0;
for (var i = 0; i &lt; lines.length; i++)
{
var lineWidth = this.context.measureText(lines[i]).width;
lineWidths[i] = lineWidth;
maxLineWidth = Math.max(maxLineWidth, lineWidth);
}
this.canvas.width = maxLineWidth + this.style.strokeThickness;
//calculate text height
var lineHeight = this.determineFontHeight(&#x27;font: &#x27; + this.style.font + &#x27;;&#x27;) + this.style.strokeThickness;
this.canvas.height = lineHeight * lines.length;
if(navigator.isCocoonJS) this.context.clearRect(0,0,this.canvas.width,this.canvas.height);
//set canvas text styles
this.context.fillStyle = this.style.fill;
this.context.font = this.style.font;
this.context.strokeStyle = this.style.stroke;
this.context.lineWidth = this.style.strokeThickness;
this.context.textBaseline = &#x27;top&#x27;;
//draw lines line by line
for (i = 0; i &lt; lines.length; i++)
{
var linePosition = new PIXI.Point(this.style.strokeThickness / 2, this.style.strokeThickness / 2 + i * lineHeight);
if(this.style.align === &#x27;right&#x27;)
{
linePosition.x += maxLineWidth - lineWidths[i];
}
else if(this.style.align === &#x27;center&#x27;)
{
linePosition.x += (maxLineWidth - lineWidths[i]) / 2;
}
if(this.style.stroke &amp;&amp; this.style.strokeThickness)
{
this.context.strokeText(lines[i], linePosition.x, linePosition.y);
}
if(this.style.fill)
{
this.context.fillText(lines[i], linePosition.x, linePosition.y);
}
}
this.updateTexture();
};
/**
* Updates texture size based on canvas size
*
* @method updateTexture
* @private
*/
PIXI.Text.prototype.updateTexture = function()
{
this.texture.baseTexture.width = this.canvas.width;
this.texture.baseTexture.height = this.canvas.height;
this.texture.frame.width = this.canvas.width;
this.texture.frame.height = this.canvas.height;
this._width = this.canvas.width;
this._height = this.canvas.height;
this.requiresUpdate = true;
};
PIXI.Text.prototype._renderWebGL = function(renderSession)
{
if(this.requiresUpdate)
{
this.requiresUpdate = false;
PIXI.updateWebGLTexture(this.texture.baseTexture, renderSession.gl);
}
PIXI.Sprite.prototype._renderWebGL.call(this, renderSession);
};
/**
* Updates the transform of this object
*
* @method updateTransform
* @private
*/
PIXI.Text.prototype.updateTransform = function()
{
if(this.dirty)
{
this.updateText();
this.dirty = false;
}
PIXI.Sprite.prototype.updateTransform.call(this);
};
/*
* http://stackoverflow.com/users/34441/ellisbben
* great solution to the problem!
*
* @method determineFontHeight
* @param fontStyle {Object}
* @private
*/
PIXI.Text.prototype.determineFontHeight = function(fontStyle)
{
// build a little reference dictionary so if the font style has been used return a
// cached version...
var result = PIXI.Text.heightCache[fontStyle];
if(!result)
{
var body = document.getElementsByTagName(&#x27;body&#x27;)[0];
var dummy = document.createElement(&#x27;div&#x27;);
var dummyText = document.createTextNode(&#x27;M&#x27;);
dummy.appendChild(dummyText);
dummy.setAttribute(&#x27;style&#x27;, fontStyle + &#x27;;position:absolute;top:0;left:0&#x27;);
body.appendChild(dummy);
result = dummy.offsetHeight;
PIXI.Text.heightCache[fontStyle] = result;
body.removeChild(dummy);
}
return result;
};
/**
* Applies newlines to a string to have it optimally fit into the horizontal
* bounds set by the Text object&#x27;s wordWrapWidth property.
*
* @method wordWrap
* @param text {String}
* @private
*/
PIXI.Text.prototype.wordWrap = function(text)
{
// Greedy wrapping algorithm that will wrap words as the line grows longer
// than its horizontal bounds.
var result = &#x27;&#x27;;
var lines = text.split(&#x27;\n&#x27;);
for (var i = 0; i &lt; lines.length; i++)
{
var spaceLeft = this.style.wordWrapWidth;
var words = lines[i].split(&#x27; &#x27;);
for (var j = 0; j &lt; words.length; j++)
{
var wordWidth = this.context.measureText(words[j]).width;
var wordWidthWithSpace = wordWidth + this.context.measureText(&#x27; &#x27;).width;
if(wordWidthWithSpace &gt; spaceLeft)
{
// Skip printing the newline if it&#x27;s the first word of the line that is
// greater than the word wrap width.
if(j &gt; 0)
{
result += &#x27;\n&#x27;;
}
result += words[j] + &#x27; &#x27;;
spaceLeft = this.style.wordWrapWidth - wordWidth;
}
else
{
spaceLeft -= wordWidthWithSpace;
result += words[j] + &#x27; &#x27;;
}
}
result += &#x27;\n&#x27;;
}
return result;
};
/**
* Destroys this text object
*
* @method destroy
* @param destroyTexture {Boolean}
*/
PIXI.Text.prototype.destroy = function(destroyTexture)
{
if(destroyTexture)
{
this.texture.destroy();
}
};
PIXI.Text.heightCache = {};
</pre>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<script src="../assets/vendor/prettify/prettify-min.js"></script>
<script>prettyPrint();</script>
<script src="../assets/js/yui-prettify.js"></script>
<script src="../assets/../api.js"></script>
<script src="../assets/js/api-filter.js"></script>
<script src="../assets/js/api-list.js"></script>
<script src="../assets/js/api-search.js"></script>
<script src="../assets/js/apidocs.js"></script>
</body>
</html>