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<td >Qt 5.9</td><td ><a href="qtqml-index.html">Qt QML</a></td><td ><a href="qtqml-module.html">C++ Classes</a></td><td >QQmlImageProviderBase</td></tr></table><table class="buildversion"><tr>
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<h3><a name="toc">Contents</a></h3>
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<li class="level1"><a href="#public-types">Public Types</a></li>
<li class="level1"><a href="#public-functions">Public Functions</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
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<h1 class="title">QQmlImageProviderBase Class</h1>
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<p>The <a href="qqmlimageproviderbase.html">QQmlImageProviderBase</a> class is used to register image providers in the QML engine. <a href="#details">More...</a></p>
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<tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign"> <span class="preprocessor">#include <QQmlImageProviderBase></span>
</td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> QT += qml</td></tr></table></div><ul>
<li><a href="qqmlimageproviderbase-members.html">List of all members, including inherited members</a></li>
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<h2 id="public-types">Public Types</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> enum </td><td class="memItemRight bottomAlign"><b><a href="qqmlimageproviderbase.html#Flag-enum">Flag</a></b> { ForceAsynchronousImageLoading }</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> flags </td><td class="memItemRight bottomAlign"><b><a href="qqmlimageproviderbase.html#Flag-enum">Flags</a></b></td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> enum </td><td class="memItemRight bottomAlign"><b><a href="qqmlimageproviderbase.html#ImageType-enum">ImageType</a></b> { Image, Pixmap, Texture, ImageResponse }</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> virtual Flags </td><td class="memItemRight bottomAlign"><b><a href="qqmlimageproviderbase.html#flags">flags</a></b>() const = 0</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual ImageType </td><td class="memItemRight bottomAlign"><b><a href="qqmlimageproviderbase.html#imageType">imageType</a></b>() const = 0</td></tr>
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<h2 id="details">Detailed Description</h2>
<p>The <a href="qqmlimageproviderbase.html">QQmlImageProviderBase</a> class is used to register image providers in the QML engine.</p>
<p>Image providers must be registered with the QML engine. The only information the QML engine knows about image providers is the type of image data they provide. To use an image provider to acquire image data, you must cast the <a href="qqmlimageproviderbase.html">QQmlImageProviderBase</a> pointer to a QQuickImageProvider pointer.</p>
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<p><b>See also </b>QQuickImageProvider and QQuickTextureFactory.</p>
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<h2>Member Type Documentation</h2>
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<h3 class="flags" id="Flag-enum"><a name="Flag-enum"></a>enum QQmlImageProviderBase::<span class="name">Flag</span><br/>flags QQmlImageProviderBase::<span class="name">Flags</span></h3>
<p>Defines specific requirements or features of this image provider.</p>
<div class="table"><table class="valuelist"><tr valign="top" class="odd"><th class="tblConst">Constant</th><th class="tblval">Value</th><th class="tbldscr">Description</th></tr>
<tr><td class="topAlign"><code>QQmlImageProviderBase::ForceAsynchronousImageLoading</code></td><td class="topAlign tblval"><code>0x01</code></td><td class="topAlign">Ensures that image requests to the provider are run in a separate thread, which allows the provider to spend as much time as needed on producing the image without blocking the main thread.</td></tr>
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<p>The Flags type is a typedef for <a href="../qtcore/qflags.html">QFlags</a><Flag>. It stores an OR combination of Flag values.</p>
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<h3 class="fn" id="ImageType-enum"><a name="ImageType-enum"></a>enum QQmlImageProviderBase::<span class="name">ImageType</span></h3>
<p>Defines the type of image supported by this image provider.</p>
<div class="table"><table class="valuelist"><tr valign="top" class="odd"><th class="tblConst">Constant</th><th class="tblval">Value</th><th class="tbldscr">Description</th></tr>
<tr><td class="topAlign"><code>QQmlImageProviderBase::Image</code></td><td class="topAlign tblval"><code>0</code></td><td class="topAlign">The Image Provider provides <a href="../qtgui/qimage.html">QImage</a> images. The QQuickImageProvider::requestImage() method will be called for all image requests.</td></tr>
<tr><td class="topAlign"><code>QQmlImageProviderBase::Pixmap</code></td><td class="topAlign tblval"><code>1</code></td><td class="topAlign">The Image Provider provides <a href="../qtgui/qpixmap.html">QPixmap</a> images. The QQuickImageProvider::requestPixmap() method will be called for all image requests.</td></tr>
<tr><td class="topAlign"><code>QQmlImageProviderBase::Texture</code></td><td class="topAlign tblval"><code>2</code></td><td class="topAlign">The Image Provider provides QSGTextureProvider based images. The QQuickImageProvider::requestTexture() method will be called for all image requests.</td></tr>
<tr><td class="topAlign"><code>QQmlImageProviderBase::ImageResponse</code></td><td class="topAlign tblval"><code>4</code></td><td class="topAlign">The Image provider provides QQuickTextureFactory based images. Should only be used in QQuickAsyncImageProvider or its subclasses. The QQuickAsyncImageProvider::requestImageResponse() method will be called for all image requests. Since Qt 5.6</td></tr>
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<h2>Member Function Documentation</h2>
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<h3 class="fn" id="flags"><a name="flags"></a><code>[pure virtual] </code><span class="type"><a href="qqmlimageproviderbase.html#Flag-enum">Flags</a></span> QQmlImageProviderBase::<span class="name">flags</span>() const</h3>
<p>Implement this to return the properties of this image provider.</p>
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<h3 class="fn" id="imageType"><a name="imageType"></a><code>[pure virtual] </code><span class="type"><a href="qqmlimageproviderbase.html#ImageType-enum">ImageType</a></span> QQmlImageProviderBase::<span class="name">imageType</span>() const</h3>
<p>Implement this method to return the image type supported by this image provider.</p>
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