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fabric.Canvas.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>JSDoc: Class: Canvas</title>
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<h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="fabric.ActiveSelection.html">ActiveSelection</a></li><li><a href="fabric.BaseBrush.html">BaseBrush</a></li><li><a href="fabric.Canvas.html">Canvas</a></li><li><a href="fabric.Circle.html">Circle</a></li><li><a href="fabric.CircleBrush.html">CircleBrush</a></li><li><a href="fabric.Color.html">Color</a></li><li><a href="fabric.Ellipse.html">Ellipse</a></li><li><a href="fabric.Gradient.html">Gradient</a></li><li><a href="fabric.Group.html">Group</a></li><li><a href="fabric.Image.html">Image</a></li><li><a href="fabric.Image.filters.BaseFilter.html">BaseFilter</a></li><li><a href="fabric.Image.filters.Blur.html">Blur</a></li><li><a href="fabric.Image.filters.Brightness.html">Brightness</a></li><li><a href="fabric.Image.filters.ColorMatrix.html">ColorMatrix</a></li><li><a href="fabric.Image.filters.Contrast.html">Contrast</a></li><li><a href="fabric.Image.filters.Convolute.html">Convolute</a></li><li><a href="fabric.Image.filters.fabric.Image.filter.BlendColor.html">BlendColor</a></li><li><a href="fabric.Image.filters.fabric.Image.filter.BlendImage.html">BlendImage</a></li><li><a href="fabric.Image.filters.Gamma.html">Gamma</a></li><li><a href="fabric.Image.filters.Grayscale.html">Grayscale</a></li><li><a href="fabric.Image.filters.HueRotation.html">HueRotation</a></li><li><a href="fabric.Image.filters.Invert.html">Invert</a></li><li><a href="fabric.Image.filters.Noise.html">Noise</a></li><li><a href="fabric.Image.filters.Pixelate.html">Pixelate</a></li><li><a href="fabric.Image.filters.RemoveColor.html">RemoveColor</a></li><li><a href="fabric.Image.filters.Resize.html">Resize</a></li><li><a href="fabric.Image.filters.Saturation.html">Saturation</a></li><li><a href="fabric.Intersection.html">Intersection</a></li><li><a href="fabric.IText.html">IText</a></li><li><a href="fabric.Line.html">Line</a></li><li><a href="fabric.Object.html">Object</a></li><li><a href="fabric.Path.html">Path</a></li><li><a href="fabric.Pattern.html">Pattern</a></li><li><a href="fabric.PatternBrush.html">PatternBrush</a></li><li><a href="fabric.PencilBrush.html">PencilBrush</a></li><li><a href="fabric.Point.html">Point</a></li><li><a href="fabric.Polygon.html">Polygon</a></li><li><a href="fabric.Polyline.html">Polyline</a></li><li><a href="fabric.Rect.html">Rect</a></li><li><a href="fabric.Shadow.html">Shadow</a></li><li><a href="fabric.SprayBrush.html">SprayBrush</a></li><li><a href="fabric.StaticCanvas.html">StaticCanvas</a></li><li><a href="fabric.Text.html">Text</a></li><li><a href="fabric.Textbox.html">Textbox</a></li><li><a href="fabric.Triangle.html">Triangle</a></li></ul><h3>Namespaces</h3><ul><li><a href="fabric.html">fabric</a></li><li><a href="fabric.Collection.html">Collection</a></li><li><a href="fabric.CommonMethods.html">CommonMethods</a></li><li><a href="fabric.Image.filters.html">filters</a></li><li><a href="fabric.Observable.html">Observable</a></li><li><a href="fabric.util.html">util</a></li><li><a href="fabric.util.array.html">array</a></li><li><a href="fabric.util.ease.html">ease</a></li><li><a href="fabric.util.object.html">object</a></li><li><a href="fabric.util.string.html">string</a></li></ul><h3>Global</h3><ul><li><a href="global.html#__cachedLines">__cachedLines</a></li><li><a href="global.html#_splitTextIntoLines">_splitTextIntoLines</a></li><li><a href="global.html#_wrapLine">_wrapLine</a></li><li><a href="global.html#_wrapText">_wrapText</a></li><li><a href="global.html#applyFilters">applyFilters</a></li><li><a href="global.html#copyGLTo2DDrawImage">copyGLTo2DDrawImage</a></li><li><a href="global.html#copyGLTo2DPutImageData">copyGLTo2DPutImageData</a></li><li><a href="global.html#dynamicMinWidth">dynamicMinWidth</a></li><li><a href="global.html#isEmptyStyles">isEmptyStyles</a></li><li><a href="global.html#isEndOfWrapping">isEndOfWrapping</a></li><li><a href="global.html#lockScalingFlip">lockScalingFlip</a></li><li><a href="global.html#minWidth">minWidth</a></li><li><a href="global.html#missingNewlineOffset">missingNewlineOffset</a></li><li><a href="global.html#noScaleCache">noScaleCache</a></li><li><a href="global.html#splitByGrapheme">splitByGrapheme</a></li><li><a href="global.html#styleHas">styleHas</a></li><li><a href="global.html#toObject">toObject</a></li><li><a href="global.html#type">type</a></li></ul>
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<div id="main">
<h1 class="page-title">Class: Canvas</h1>
<section>
<header>
<h2>
<span class="ancestors"><a href="fabric.html">fabric</a>.</span>Canvas</h2>
</header>
<article>
<div class="container-overview">
<h4 class="name" id="Canvas"><a href="#Canvas" ><span class="type-signature"></span>new Canvas<span class="signature">()</span><span class="type-signature"></span></a></h4>
<div class="description">
Canvas class
</div>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="fabric.js.html">fabric.js</a>, <a href="fabric.js.html#line9395">line 9395</a>
</li></ul></dd>
<dt class="tag-tutorial">Tutorials:</dt>
<dd class="tag-tutorial">
<ul>
<li><em class="disabled">Tutorial: <a href="http://fabricjs.com/fabric-intro-part-1#canvas">http://fabricjs.com/fabric-intro-part-1#canvas</a></em></li>
</ul>
</dd>
<dt class="tag-see">See:</dt>
<dd class="tag-see">
<ul>
<li><a href="fabric.Canvas.html#initialize">fabric.Canvas#initialize</a> for constructor definition</li>
</ul>
</dd>
</dl>
<h5>Fires:</h5>
<ul>
<li>object:modified at the end of a transform or any change when statefull is true</li>
<li>object:rotated at the end of a rotation transform</li>
<li>object:scaled at the end of a scale transform</li>
<li>object:moved at the end of translation transform</li>
<li>object:skewed at the end of a skew transform</li>
<li>object:rotating while an object is being rotated from the control</li>
<li>object:scaling while an object is being scaled by controls</li>
<li>object:moving while an object is being dragged</li>
<li>object:skewing while an object is being skewed from the controls</li>
<li>object:selected this event is deprecated.event: use selection:created</li>
<li>before:transform before a transform is is started</li>
<li>before:selection:cleared</li>
<li>selection:cleared</li>
<li>selection:updated</li>
<li>selection:created</li>
<li>path:created after a drawing operation ends and the path is added</li>
<li>mouse:down</li>
<li>mouse:move</li>
<li>mouse:up</li>
<li>mouse:down:before on mouse down,event: before the inner fabric logic runs</li>
<li>mouse:move:before on mouse move,event: before the inner fabric logic runs</li>
<li>mouse:up:before on mouse up,event: before the inner fabric logic runs</li>
<li>mouse:over</li>
<li>mouse:out</li>
<li>mouse:dblclick whenever a native dbl click event fires on the canvas.</li>
<li>event:dragover</li>
<li>event:dragenter</li>
<li>event:dragleave</li>
<li>event:drop</li>
<li>after:render at the end of the render process,event: receives the context in the callback</li>
<li>before:render at start the render process,event: receives the context in the callback</li>
</ul>
</div>
<h3 class="subsection-title">Extends</h3>
<ul>
<li><a href="fabric.StaticCanvas.html">fabric.StaticCanvas</a></li>
</ul>
<h3 class="subsection-title">Members</h3>
<div class="inherited">
<h4 class="name" id="allowTouchScrolling"><a href="#allowTouchScrolling" ><span class="type-signature"></span>allowTouchScrolling<span class="type-signature"> :Boolean</span></a></h4>
<div class="description">
Indicates whether the browser can be scrolled when using a touchscreen and dragging on the canvas
</div>
<h5>Type:</h5>
<ul>
<li>
<span class="param-type">Boolean</span>
</li>
</ul>
<dl class="details">
<dt class="inherited-from">Inherited From:</dt>
<dd class="inherited-from"><ul class="dummy"><li>
<a href="fabric.StaticCanvas.html#allowTouchScrolling">fabric.StaticCanvas#allowTouchScrolling</a>
</li></ul></dd>
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="fabric.js.html">fabric.js</a>, <a href="fabric.js.html#line6788">line 6788</a>
</li></ul></dd>
</dl>
</div>
<h4 class="name" id="altActionKey"><a href="#altActionKey" ><span class="type-signature"></span>altActionKey<span class="type-signature"> :String</span></a></h4>
<div class="description">
Indicates which key enable alternate action on corner
values: 'altKey', 'shiftKey', 'ctrlKey'.
If `null` or 'none' or any other string that is not a modifier key
feature is disabled feature disabled.
</div>
<h5>Type:</h5>
<ul>
<li>
<span class="param-type">String</span>
</li>
</ul>
<dl class="details">
<dt class="tag-since">Since:</dt>
<dd class="tag-since"><ul class="dummy"><li>1.6.2</li></ul></dd>
<dt class="tag-default">Default Value:</dt>
<dd class="tag-default"><ul class="dummy">
<li>shiftKey</li>
</ul></dd>
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="fabric.js.html">fabric.js</a>, <a href="fabric.js.html#line9511">line 9511</a>
</li></ul></dd>
</dl>
<h4 class="name" id="altSelectionKey"><a href="#altSelectionKey" ><span class="type-signature"></span>altSelectionKey<span class="type-signature"> :null|String</span></a></h4>
<div class="description">
Indicates which key enable alternative selection
in case of target overlapping with active object
values: 'altKey', 'shiftKey', 'ctrlKey'.
For a series of reason that come from the general expectations on how
things should work, this feature works only for preserveObjectStacking true.
If `null` or 'none' or any other string that is not a modifier key
feature is disabled.
</div>
<h5>Type:</h5>
<ul>
<li>
<span class="param-type">null</span>
|
<span class="param-type">String</span>
</li>
</ul>
<dl class="details">
<dt class="tag-since">Since:</dt>
<dd class="tag-since"><ul class="dummy"><li>1.6.5</li></ul></dd>
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="fabric.js.html">fabric.js</a>, <a href="fabric.js.html#line9551">line 9551</a>
</li></ul></dd>
</dl>
<div class="inherited">
<h4 class="name" id="backgroundColor"><a href="#backgroundColor" ><span class="type-signature"></span>backgroundColor<span class="type-signature"> :String|<a href="fabric.Pattern.html">fabric.Pattern</a></span></a></h4>
<div class="description">
Background color of canvas instance.
Should be set via <a href="fabric.StaticCanvas.html#setBackgroundColor">fabric.StaticCanvas#setBackgroundColor</a>.
</div>
<h5>Type:</h5>
<ul>
<li>
<span class="param-type">String</span>
|
<span class="param-type"><a href="fabric.Pattern.html">fabric.Pattern</a></span>
</li>
</ul>
<dl class="details">
<dt class="inherited-from">Inherited From:</dt>
<dd class="inherited-from"><ul class="dummy"><li>
<a href="fabric.StaticCanvas.html#backgroundColor">fabric.StaticCanvas#backgroundColor</a>
</li></ul></dd>
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="fabric.js.html">fabric.js</a>, <a href="fabric.js.html#line6698">line 6698</a>
</li></ul></dd>
</dl>
</div>
<div class="inherited">
<h4 class="name" id="backgroundImage"><a href="#backgroundImage" ><span class="type-signature"></span>backgroundImage<span class="type-signature"> :<a href="fabric.Image.html">fabric.Image</a></span></a></h4>
<div class="description">
Background image of canvas instance.
Should be set via <a href="fabric.StaticCanvas.html#setBackgroundImage">fabric.StaticCanvas#setBackgroundImage</a>.
<b>Backwards incompatibility note:</b> The "backgroundImageOpacity"
and "backgroundImageStretch" properties are deprecated since 1.3.9.
Use <a href="fabric.Image.html#opacity">fabric.Image#opacity</a>, <a href="fabric.Image.html#width">fabric.Image#width</a> and <a href="fabric.Image.html#height">fabric.Image#height</a>.
since 2.4.0 image caching is active, please when putting an image as background, add to the
canvas property a reference to the canvas it is on. Otherwise the image cannot detect the zoom
vale. As an alternative you can disable image objectCaching
</div>
<h5>Type:</h5>
<ul>
<li>
<span class="param-type"><a href="fabric.Image.html">fabric.Image</a></span>
</li>
</ul>
<dl class="details">
<dt class="inherited-from">Inherited From:</dt>
<dd class="inherited-from"><ul class="dummy"><li>
<a href="fabric.StaticCanvas.html#backgroundImage">fabric.StaticCanvas#backgroundImage</a>
</li></ul></dd>
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="fabric.js.html">fabric.js</a>, <a href="fabric.js.html#line6712">line 6712</a>
</li></ul></dd>
</dl>
</div>
<div class="inherited">
<h4 class="name" id="backgroundVpt"><a href="#backgroundVpt" ><span class="type-signature"></span>backgroundVpt<span class="type-signature"> :Boolean</span></a></h4>
<div class="description">
if set to false background image is not affected by viewport transform
</div>
<h5>Type:</h5>
<ul>
<li>
<span class="param-type">Boolean</span>
</li>
</ul>
<dl class="details">
<dt class="tag-since">Since:</dt>
<dd class="tag-since"><ul class="dummy"><li>1.6.3</li></ul></dd>
<dt class="inherited-from">Inherited From:</dt>
<dd class="inherited-from"><ul class="dummy"><li>
<a href="fabric.StaticCanvas.html#backgroundVpt">fabric.StaticCanvas#backgroundVpt</a>
</li></ul></dd>
<dt class="tag-default">Default Value:</dt>
<dd class="tag-default"><ul class="dummy">
<li>true</li>
</ul></dd>
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="fabric.js.html">fabric.js</a>, <a href="fabric.js.html#line6810">line 6810</a>
</li></ul></dd>
</dl>
</div>
<h4 class="name" id="centeredKey"><a href="#centeredKey" ><span class="type-signature"></span>centeredKey<span class="type-signature"> :String</span></a></h4>
<div class="description">
Indicates which key enable centered Transform
values: 'altKey', 'shiftKey', 'ctrlKey'.
If `null` or 'none' or any other string that is not a modifier key
feature is disabled feature disabled.
</div>
<h5>Type:</h5>
<ul>
<li>
<span class="param-type">String</span>
</li>
</ul>
<dl class="details">
<dt class="tag-since">Since:</dt>
<dd class="tag-since"><ul class="dummy"><li>1.6.2</li></ul></dd>
<dt class="tag-default">Default Value:</dt>
<dd class="tag-default"><ul class="dummy">
<li>altKey</li>
</ul></dd>
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="fabric.js.html">fabric.js</a>, <a href="fabric.js.html#line9500">line 9500</a>
</li></ul></dd>
</dl>
<h4 class="name" id="centeredRotation"><a href="#centeredRotation" ><span class="type-signature"></span>centeredRotation<span class="type-signature"> :Boolean</span></a></h4>
<div class="description">
When true, objects use center point as the origin of rotate transformation.
<b>Backwards incompatibility note:</b> This property replaces "centerTransform" (Boolean).
</div>
<h5>Type:</h5>
<ul>
<li>
<span class="param-type">Boolean</span>
</li>
</ul>
<dl class="details">
<dt class="tag-since">Since:</dt>
<dd class="tag-since"><ul class="dummy"><li>1.3.4</li></ul></dd>
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="fabric.js.html">fabric.js</a>, <a href="fabric.js.html#line9489">line 9489</a>
</li></ul></dd>
</dl>
<h4 class="name" id="centeredScaling"><a href="#centeredScaling" ><span class="type-signature"></span>centeredScaling<span class="type-signature"> :Boolean</span></a></h4>
<div class="description">
When true, objects use center point as the origin of scale transformation.
<b>Backwards incompatibility note:</b> This property replaces "centerTransform" (Boolean).
</div>
<h5>Type:</h5>
<ul>
<li>
<span class="param-type">Boolean</span>
</li>
</ul>
<dl class="details">
<dt class="tag-since">Since:</dt>
<dd class="tag-since"><ul class="dummy"><li>1.3.4</li></ul></dd>
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="fabric.js.html">fabric.js</a>, <a href="fabric.js.html#line9480">line 9480</a>
</li></ul></dd>
</dl>
<div class="inherited">