📄 biimagepreloader.html
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<h1 id="BiImagePreloader">BiImagePreloader</h1>
<p>
This class handles preloading of an image. There will never be more than
one instance of this class per image URI. So if there already exists a
preloader for the given URI that will be returned.<br>
<br>
Since there might be other objects dependent on the current instance it
is not a good idea to call dispose on the instance object. Disposal is
handled by the system.
</p>
<p>This class extends
<code><a href="BiEventTarget.html">BiEventTarget</a></code>
and therefore all methods and fields available for
<code><a href="BiEventTarget.html">BiEventTarget</a></code>
are also available for <code>BiImagePreloader</code>.</p>
<ul class="partial-class-tree">
<li><code><a href="BiObject.html">BiObject</a></code><ul>
<li><code><a href="BiEventTarget.html">BiEventTarget</a></code><ul><li><code>BiImagePreloader</code><ul id="api-derived-classes"></ul></li></ul></li></ul>
</li>
</ul>
<h2>Constructor</h2>
<p><code>
new BiImagePreloader(<span class="methodArgument">sUri</span>)</code></p>
<h3>Parameters</h3>
<table>
<thead>
<tr>
<td>Name</td>
<td>Type</td>
<td class="optional-header">Optional</td>
<td>Default</td>
<td>Descripton</td>
</tr>
</thead>
<tbody>
<tr>
<td><code>sUri</code></td>
<td><code class="type">String</code></td>
<td class="optional-column"></td>
<td></td>
<td>The location of the image file to preload</td>
</tr>
</tbody>
</table>
<h2>Properties</h2>
<table>
<thead>
<tr>
<td>Name</td>
<td>Type</td>
<td class="get-header">get</td>
<td class="set-header">set</td>
<td>Descripton</td>
</tr>
</thead>
<tbody>
<tr>
<td><a name="height"></a><code>height</code></td>
<td><code class="type">Number</code></td>
<td class="get-column"><img src="check.png" alt="checked"></td>
<td class="set-column"></td>
<td>The natural height of the image.
This might be undefined before the image has loaded</td>
</tr>
<tr>
<td><a name="loaded"></a><code>loaded</code></td>
<td><code class="type">Boolean</code></td>
<td class="get-column"><img src="check.png" alt="checked"></td>
<td class="set-column"></td>
<td>
This becomes <code>true</code> once the image is loaded
</td>
</tr>
<tr>
<td><a name="width"></a><code>width</code></td>
<td><code class="type">Number</code></td>
<td class="get-column"><img src="check.png" alt="checked"></td>
<td class="set-column"></td>
<td>The natural width of the image.
This might be undefined before the image has loaded</td>
</tr>
</tbody>
</table>
<h2>Methods</h2>
<p>None.</p>
<h2>Events</h2>
<table>
<thead>
<tr>
<td>Name</td>
<td>Type</td>
<td class="bubbles-header">Bubbles</td>
<td>Descripton</td>
</tr>
</thead>
<tbody>
<tr>
<td><a name="error"></a><code>error</code></td>
<td><code class="type"><code><a href="BiEvent.html">BiEvent</a></code></code></td>
<td class="bubbles-column"></td>
<td>Fires if the image file fails to load</td>
</tr>
<tr>
<td><a name="load"></a><code>load</code></td>
<td><code class="type"><code><a href="BiEvent.html">BiEvent</a></code></code></td>
<td class="bubbles-column"></td>
<td>Fires when the image file loads</td>
</tr>
</tbody>
</table>
<h2>Static Methods</h2>
<p>None.</p>
<h2>Static Fields</h2>
<p>None.</p>
<h2>Remarks</h2>
<p>
The image file might already be loaded when the constructor returns and
therefore it is not sufficient to depend on the <code><a href="#load">load</a></code> event.
Therefore it is a good idea to check <code><a href="#loaded">loaded</a></code> as well.
</p>
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