javascript
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tentone.escher.js
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>JSDoc: Class: Pointer</title>

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<div id="main">

    <h1 class="page-title">Class: Pointer</h1>

    
<section>

<header>
    
        <h2><span class="attribs"><span class="type-signature"></span></span>Pointer<span class="signature">(domElement, canvas)</span><span class="type-signature"></span></h2>
        
    
</header>

<article>
    <div class="container-overview">
    
        
    <h4 class="name" id="Pointer"><span class="type-signature"></span>new Pointer<span class="signature">(domElement, canvas)</span><span class="type-signature"></span></h4>
    

<div class="description">
    Pointer object is used to called input from the user, works for booth mouse or touch screens.

It is responsible for synchronizing user input with the render of the graphics.
</div>


    <h5>Parameters:</h5>
    

<table class="params">
    <thead>
    <tr>
        
        <th>Name</th>
        

        <th>Type</th>

        
        <th class="last">Description</th>
    </tr>
    </thead>

    <tbody>
    

        <tr>
            
                <td class="name"><code>domElement</code></td>
            

            <td class="type">
            
                
<span class="param-type">Element</span>


            </td>

            
            <td class="description last">DOM element to create the pointer events.</td>
        </tr>

    
        <tr>
            
                <td class="name"><code>canvas</code></td>
            

            <td class="type">
            
                
<span class="param-type">Element</span>


            </td>

            
            <td class="description last">Canvas DOM element where the content is being drawn.</td>
        </tr>

    
    </tbody>
</table>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="input_Pointer.js.html">input/Pointer.js</a>, <a href="input_Pointer.js.html#line14">line 14</a>
    </li></ul></dd>
    

</dl>


    </div>

    
        <h3 class="subsection-title">Members</h3>

        
<h4 class="name" id=".BACK"><span class="type-signature">(static) </span>BACK<span class="type-signature"></span></h4>


<div class="description">
    Back pointer navigation button.
</div>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="input_Pointer.js.html">input/Pointer.js</a>, <a href="input_Pointer.js.html#line205">line 205</a>
    </li></ul></dd>
    

</dl>


<h4 class="name" id=".FORWARD"><span class="type-signature">(static) </span>FORWARD<span class="type-signature"></span></h4>


<div class="description">
    Forward pointer navigation button.
</div>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="input_Pointer.js.html">input/Pointer.js</a>, <a href="input_Pointer.js.html#line210">line 210</a>
    </li></ul></dd>
    

</dl>


<h4 class="name" id=".LEFT"><span class="type-signature">(static) </span>LEFT<span class="type-signature"></span></h4>


<div class="description">
    Left pointer button.
</div>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="input_Pointer.js.html">input/Pointer.js</a>, <a href="input_Pointer.js.html#line190">line 190</a>
    </li></ul></dd>
    

</dl>


<h4 class="name" id=".MIDDLE"><span class="type-signature">(static) </span>MIDDLE<span class="type-signature"></span></h4>


<div class="description">
    Middle pointer button.
</div>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="input_Pointer.js.html">input/Pointer.js</a>, <a href="input_Pointer.js.html#line195">line 195</a>
    </li></ul></dd>
    

</dl>


<h4 class="name" id=".RIGHT"><span class="type-signature">(static) </span>RIGHT<span class="type-signature"></span></h4>


<div class="description">
    Right pointer button.
</div>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="input_Pointer.js.html">input/Pointer.js</a>, <a href="input_Pointer.js.html#line200">line 200</a>
    </li></ul></dd>
    

</dl>


<h4 class="name" id="canvas"><span class="type-signature"></span>canvas<span class="type-signature"></span></h4>


<div class="description">
    Canvas attached to this pointer instance used to calculate position and delta in element space coordinates.
</div>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="input_Pointer.js.html">input/Pointer.js</a>, <a href="input_Pointer.js.html#line58">line 58</a>
    </li></ul></dd>
    

</dl>


<h4 class="name" id="delta"><span class="type-signature"></span>delta<span class="type-signature"></span></h4>


<div class="description">
    Pointer movement (coordinates in window space).
</div>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="input_Pointer.js.html">input/Pointer.js</a>, <a href="input_Pointer.js.html#line38">line 38</a>
    </li></ul></dd>
    

</dl>


<h4 class="name" id="domElement"><span class="type-signature"></span>domElement<span class="type-signature"></span></h4>


<div class="description">
    DOM element where to attach the pointer events.
</div>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="input_Pointer.js.html">input/Pointer.js</a>, <a href="input_Pointer.js.html#line53">line 53</a>
    </li></ul></dd>
    

</dl>


<h4 class="name" id="doubleClicked"><span class="type-signature"></span>doubleClicked<span class="type-signature"></span></h4>


<div class="description">
    Indicates a button of the pointer was double clicked.
</div>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="input_Pointer.js.html">input/Pointer.js</a>, <a href="input_Pointer.js.html#line48">line 48</a>
    </li></ul></dd>
    

</dl>


<h4 class="name" id="events"><span class="type-signature"></span>events<span class="type-signature"></span></h4>


<div class="description">
    Event manager responsible for updating the raw data variables.

Diferent events are used depending on the host platform.

When the update method is called the raw data is reset.
</div>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="input_Pointer.js.html">input/Pointer.js</a>, <a href="input_Pointer.js.html#line71">line 71</a>
    </li></ul></dd>
    

</dl>


<h4 class="name" id="keys"><span class="type-signature"></span>keys<span class="type-signature"></span></h4>


<div class="description">
    Array with pointer buttons status.
</div>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="input_Pointer.js.html">input/Pointer.js</a>, <a href="input_Pointer.js.html#line28">line 28</a>
    </li></ul></dd>
    

</dl>


<h4 class="name" id="position"><span class="type-signature"></span>position<span class="type-signature"></span></h4>


<div class="description">
    Pointer position inside of the window (coordinates in window space).
</div>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="input_Pointer.js.html">input/Pointer.js</a>, <a href="input_Pointer.js.html#line33">line 33</a>
    </li></ul></dd>
    

</dl>


<h4 class="name" id="wheel"><span class="type-signature"></span>wheel<span class="type-signature"></span></h4>


<div class="description">
    Pointer scroll wheel movement.
</div>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="input_Pointer.js.html">input/Pointer.js</a>, <a href="input_Pointer.js.html#line43">line 43</a>
    </li></ul></dd>
    

</dl>


        <h3 class="subsection-title">Methods</h3>

        
    <h4 class="name" id=".buttonDoubleClicked"><span class="type-signature">(static) </span>buttonDoubleClicked<span class="signature">(button)</span><span class="type-signature"> &rarr; {boolean}</span></h4>
    

<div class="description">
    Check if pointer button was double clicked.
</div>


    <h5>Parameters:</h5>
    

<table class="params">
    <thead>
    <tr>
        
        <th>Name</th>
        

        <th>Type</th>

        
        <th class="last">Description</th>
    </tr>
    </thead>

    <tbody>
    

        <tr>
            
                <td class="name"><code>button</code></td>
            

            <td class="type">
            
                
<span class="param-type">Number</span>


            </td>

            
            <td class="description last">Button to check status of</td>
        </tr>

    
    </tbody>
</table>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="input_Pointer.js.html">input/Pointer.js</a>, <a href="input_Pointer.js.html#line261">line 261</a>
    </li></ul></dd>
    

</dl>


<h5>Returns:</h5>

        
<div class="param-desc">
    True if some pointer button was just double clicked
</div>


<dl>
    <dt>
        Type
    </dt>
    <dd>
        
<span class="param-type">boolean</span>


    </dd>
</dl>

    
    <h4 class="name" id=".buttonJustPressed"><span class="type-signature">(static) </span>buttonJustPressed<span class="signature">(button)</span><span class="type-signature"> &rarr; {boolean}</span></h4>
    

<div class="description">
    Check if a pointer button was just pressed.
</div>


    <h5>Parameters:</h5>
    

<table class="params">
    <thead>
    <tr>
        
        <th>Name</th>
        

        <th>Type</th>

        
        <th class="last">Description</th>
    </tr>
    </thead>

    <tbody>
    

        <tr>
            
                <td class="name"><code>button</code></td>
            

            <td class="type">
            
                
<span class="param-type">Number</span>


            </td>

            
            <td class="description last">Button to check status of</td>
        </tr>

    
    </tbody>
</table>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="input_Pointer.js.html">input/Pointer.js</a>, <a href="input_Pointer.js.html#line272">line 272</a>
    </li></ul></dd>
    

</dl>


<h5>Returns:</h5>

        
<div class="param-desc">
    True if button was just pressed
</div>


<dl>
    <dt>
        Type
    </dt>
    <dd>
        
<span class="param-type">boolean</span>


    </dd>
</dl>

    
    <h4 class="name" id=".buttonJustReleased"><span class="type-signature">(static) </span>buttonJustReleased<span class="signature">(button)</span><span class="type-signature"> &rarr; {boolean}</span></h4>
    

<div class="description">
    Check if a pointer button was just released.
</div>


    <h5>Parameters:</h5>
    

<table class="params">
    <thead>
    <tr>
        
        <th>Name</th>
        

        <th>Type</th>

        
        <th class="last">Description</th>
    </tr>
    </thead>

    <tbody>
    

        <tr>
            
                <td class="name"><code>button</code></td>
            

            <td class="type">
            
                
<span class="param-type">Number</span>


            </td>

            
            <td class="description last">Button to check status of</td>
        </tr>

    
    </tbody>
</table>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="input_Pointer.js.html">input/Pointer.js</a>, <a href="input_Pointer.js.html#line283">line 283</a>
    </li></ul></dd>
    

</dl>


<h5>Returns:</h5>

        
<div class="param-desc">
    True if button was just released
</div>


<dl>
    <dt>
        Type
    </dt>
    <dd>
        
<span class="param-type">boolean</span>


    </dd>
</dl>

    
    <h4 class="name" id=".buttonPressed"><span class="type-signature">(static) </span>buttonPressed<span class="signature">(button)</span><span class="type-signature"> &rarr; {boolean}</span></h4>
    

<div class="description">
    Check if pointer button is currently pressed.
</div>


    <h5>Parameters:</h5>
    

<table class="params">
    <thead>
    <tr>
        
        <th>Name</th>
        

        <th>Type</th>

        
        <th class="last">Description</th>
    </tr>
    </thead>

    <tbody>
    

        <tr>
            
                <td class="name"><code>button</code></td>
            

            <td class="type">
            
                
<span class="param-type">Number</span>


            </td>

            
            <td class="description last">Button to check status of</td>
        </tr>

    
    </tbody>
</table>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="input_Pointer.js.html">input/Pointer.js</a>, <a href="input_Pointer.js.html#line250">line 250</a>
    </li></ul></dd>
    

</dl>


<h5>Returns:</h5>

        
<div class="param-desc">
    True if button is currently pressed
</div>


<dl>
    <dt>
        Type
    </dt>
    <dd>
        
<span class="param-type">boolean</span>


    </dd>
</dl>

    
    <h4 class="name" id=".create"><span class="type-signature">(static) </span>create<span class="signature">()</span><span class="type-signature"></span></h4>
    

<div class="description">
    Create pointer events.
</div>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="input_Pointer.js.html">input/Pointer.js</a>, <a href="input_Pointer.js.html#line390">line 390</a>
    </li></ul></dd>
    

</dl>


    <h4 class="name" id=".dispose"><span class="type-signature">(static) </span>dispose<span class="signature">()</span><span class="type-signature"></span></h4>
    

<div class="description">
    Dispose pointer events.
</div>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="input_Pointer.js.html">input/Pointer.js</a>, <a href="input_Pointer.js.html#line398">line 398</a>
    </li></ul></dd>
    

</dl>


    <h4 class="name" id=".insideCanvas"><span class="type-signature">(static) </span>insideCanvas<span class="signature">()</span><span class="type-signature"> &rarr; {boolean}</span></h4>
    

<div class="description">
    Check if pointer is inside attached canvas (updated async).
</div>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="input_Pointer.js.html">input/Pointer.js</a>, <a href="input_Pointer.js.html#line239">line 239</a>
    </li></ul></dd>
    

</dl>


<h5>Returns:</h5>

        
<div class="param-desc">
    True if pointer is currently inside the canvas
</div>


<dl>
    <dt>
        Type
    </dt>
    <dd>
        
<span class="param-type">boolean</span>


    </dd>
</dl>

    
    <h4 class="name" id=".setCanvas"><span class="type-signature">(static) </span>setCanvas<span class="signature">(canvas)</span><span class="type-signature"></span></h4>
    

<div class="description">
    Element to be used for coordinates calculation relative to that canvas.
</div>


    <h5>Parameters:</h5>
    

<table class="params">
    <thead>
    <tr>
        
        <th>Name</th>
        

        <th>Type</th>

        
        <th class="last">Description</th>
    </tr>
    </thead>

    <tbody>
    

        <tr>
            
                <td class="name"><code>canvas</code></td>
            

            <td class="type">
            
                
<span class="param-type"><a href="DOM.html">DOM</a></span>


            </td>

            
            <td class="description last">Canvas to be attached to the Pointer instance</td>
        </tr>

    
    </tbody>
</table>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="input_Pointer.js.html">input/Pointer.js</a>, <a href="input_Pointer.js.html#line217">line 217</a>
    </li></ul></dd>
    

</dl>


    <h4 class="name" id=".update"><span class="type-signature">(static) </span>update<span class="signature">()</span><span class="type-signature"></span></h4>
    

<div class="description">
    Update pointer buttons state, position, wheel and delta synchronously.
</div>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="input_Pointer.js.html">input/Pointer.js</a>, <a href="input_Pointer.js.html#line332">line 332</a>
    </li></ul></dd>
    

</dl>


    <h4 class="name" id=".updateKey"><span class="type-signature">(static) </span>updateKey<span class="signature">(button, action)</span><span class="type-signature"></span></h4>
    

<div class="description">
    Update a pointer button.

Automatically called by the runtime.
</div>


    <h5>Parameters:</h5>
    

<table class="params">
    <thead>
    <tr>
        
        <th>Name</th>
        

        <th>Type</th>

        
        <th class="last">Description</th>
    </tr>
    </thead>

    <tbody>
    

        <tr>
            
                <td class="name"><code>button</code></td>
            

            <td class="type">
            
                
<span class="param-type">Number</span>


            </td>

            
            <td class="description last"></td>
        </tr>

    
        <tr>
            
                <td class="name"><code>action</code></td>
            

            <td class="type">
            
                
<span class="param-type">Number</span>


            </td>

            
            <td class="description last"></td>
        </tr>

    
    </tbody>
</table>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="input_Pointer.js.html">input/Pointer.js</a>, <a href="input_Pointer.js.html#line321">line 321</a>
    </li></ul></dd>
    

</dl>


    <h4 class="name" id=".updatePosition"><span class="type-signature">(static) </span>updatePosition<span class="signature">(x, y, xDiff, yDiff)</span><span class="type-signature"></span></h4>
    

<div class="description">
    Update pointer position.

Automatically called by the runtime.
</div>


    <h5>Parameters:</h5>
    

<table class="params">
    <thead>
    <tr>
        
        <th>Name</th>
        

        <th>Type</th>

        
        <th class="last">Description</th>
    </tr>
    </thead>

    <tbody>
    

        <tr>
            
                <td class="name"><code>x</code></td>
            

            <td class="type">
            
                
<span class="param-type">Number</span>


            </td>

            
            <td class="description last"></td>
        </tr>

    
        <tr>
            
                <td class="name"><code>y</code></td>
            

            <td class="type">
            
                
<span class="param-type">Number</span>


            </td>

            
            <td class="description last"></td>
        </tr>

    
        <tr>
            
                <td class="name"><code>xDiff</code></td>
            

            <td class="type">
            
                
<span class="param-type">Number</span>


            </td>

            
            <td class="description last"></td>
        </tr>

    
        <tr>
            
                <td class="name"><code>yDiff</code></td>
            

            <td class="type">
            
                
<span class="param-type">Number</span>


            </td>

            
            <td class="description last"></td>
        </tr>

    
    </tbody>
</table>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="input_Pointer.js.html">input/Pointer.js</a>, <a href="input_Pointer.js.html#line298">line 298</a>
    </li></ul></dd>
    

</dl>


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