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<title>Anchor Layout Example | Qt Widgets 5.12.6</title>
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<td >Qt 5.12</td><td ><a href="qtwidgets-index.html">Qt Widgets</a></td><td >Anchor Layout Example</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right"><a href="qtwidgets-index.html">Qt 5.12.6 Reference Documentation</a></td>
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<h3><a name="toc">Contents</a></h3>
<ul>
<li class="level1"><a href="#creating-a-qgraphicsscene">Creating a QGraphicsScene</a></li>
<li class="level1"><a href="#creating-widgets">Creating Widgets</a></li>
<li class="level1"><a href="#creating-a-layout">Creating a Layout</a></li>
<li class="level1"><a href="#creating-a-qgraphicswidget">Creating a QGraphicsWidget</a></li>
<li class="level1"><a href="#adding-anchors">Adding Anchors</a></li>
<li class="level1"><a href="#viewing-the-scene-with-qgraphicsview">Viewing the Scene with QGraphicsView</a></li>
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<h1 class="title">Anchor Layout Example</h1>
<span class="subtitle"></span>
<!-- $$$graphicsview/anchorlayout-brief -->
<p>Demonstrates anchor layout in a graphics view scene.</p>
<!-- @@@graphicsview/anchorlayout -->
<!-- $$$graphicsview/anchorlayout-description -->
<div class="descr"> <a name="details"></a>
<p>The Anchor Layout example demonstrates the use of the <a href="qgraphicsanchorlayout.html">QGraphicsAnchorLayout</a> class.</p>
<p class="centerAlign"><img src="images/graphicsanchorlayout-example.png" alt="" /></p><p>The basic steps of this example are:</p>
<ul>
<li>Create a <a href="qgraphicsscene.html">QGraphicsScene</a></li>
<li>Create widgets</li>
<li>Create a <a href="qgraphicsanchorlayout.html">QGraphicsAnchorLayout</a></li>
<li>Create a <a href="graphicsview.html#qgraphicswidget">QGraphicsWidget</a></li>
<li>Add vertical and horizontal anchors between the widgets</li>
<li>View the scene with a <a href="qgraphicsview.html">QGraphicsView</a> object</li>
</ul>
<a name="creating-a-qgraphicsscene"></a>
<h2 id="creating-a-qgraphicsscene">Creating a QGraphicsScene</h2>
<pre class="cpp">
<span class="type"><a href="qgraphicsscene.html">QGraphicsScene</a></span> scene;
scene<span class="operator">.</span>setSceneRect(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">800</span><span class="operator">,</span> <span class="number">480</span>);
</pre>
<a name="creating-widgets"></a>
<h2 id="creating-widgets">Creating Widgets</h2>
<pre class="cpp">
<span class="type"><a href="qgraphicsproxywidget.html">QGraphicsProxyWidget</a></span> <span class="operator">*</span>a <span class="operator">=</span> createItem(minSize<span class="operator">,</span> prefSize<span class="operator">,</span> maxSize<span class="operator">,</span> <span class="string">"A"</span>);
<span class="type"><a href="qgraphicsproxywidget.html">QGraphicsProxyWidget</a></span> <span class="operator">*</span>b <span class="operator">=</span> createItem(minSize<span class="operator">,</span> prefSize<span class="operator">,</span> maxSize<span class="operator">,</span> <span class="string">"B"</span>);
<span class="type"><a href="qgraphicsproxywidget.html">QGraphicsProxyWidget</a></span> <span class="operator">*</span>c <span class="operator">=</span> createItem(minSize<span class="operator">,</span> prefSize<span class="operator">,</span> maxSize<span class="operator">,</span> <span class="string">"C"</span>);
<span class="type"><a href="qgraphicsproxywidget.html">QGraphicsProxyWidget</a></span> <span class="operator">*</span>d <span class="operator">=</span> createItem(minSize<span class="operator">,</span> prefSize<span class="operator">,</span> maxSize<span class="operator">,</span> <span class="string">"D"</span>);
<span class="type"><a href="qgraphicsproxywidget.html">QGraphicsProxyWidget</a></span> <span class="operator">*</span>e <span class="operator">=</span> createItem(minSize<span class="operator">,</span> prefSize<span class="operator">,</span> maxSize<span class="operator">,</span> <span class="string">"E"</span>);
<span class="type"><a href="qgraphicsproxywidget.html">QGraphicsProxyWidget</a></span> <span class="operator">*</span>f <span class="operator">=</span> createItem(<span class="type"><a href="../qtcore/qsizef.html">QSizeF</a></span>(<span class="number">30</span><span class="operator">,</span> <span class="number">50</span>)<span class="operator">,</span> <span class="type"><a href="../qtcore/qsizef.html">QSizeF</a></span>(<span class="number">150</span><span class="operator">,</span> <span class="number">50</span>)<span class="operator">,</span> maxSize<span class="operator">,</span> <span class="string">"F (overflow)"</span>);
<span class="type"><a href="qgraphicsproxywidget.html">QGraphicsProxyWidget</a></span> <span class="operator">*</span>g <span class="operator">=</span> createItem(<span class="type"><a href="../qtcore/qsizef.html">QSizeF</a></span>(<span class="number">30</span><span class="operator">,</span> <span class="number">50</span>)<span class="operator">,</span> <span class="type"><a href="../qtcore/qsizef.html">QSizeF</a></span>(<span class="number">30</span><span class="operator">,</span> <span class="number">100</span>)<span class="operator">,</span> maxSize<span class="operator">,</span> <span class="string">"G (overflow)"</span>);
</pre>
<a name="creating-a-layout"></a>
<h2 id="creating-a-layout">Creating a Layout</h2>
<pre class="cpp">
<span class="type"><a href="qgraphicsanchorlayout.html">QGraphicsAnchorLayout</a></span> <span class="operator">*</span>l <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgraphicsanchorlayout.html">QGraphicsAnchorLayout</a></span>;
l<span class="operator">-</span><span class="operator">></span>setSpacing(<span class="number">0</span>);
</pre>
<a name="creating-a-qgraphicswidget"></a>
<h2 id="creating-a-qgraphicswidget">Creating a QGraphicsWidget</h2>
<pre class="cpp">
<span class="type"><a href="qgraphicswidget.html">QGraphicsWidget</a></span> <span class="operator">*</span>w <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgraphicswidget.html">QGraphicsWidget</a></span>(<span class="number">0</span><span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Window);
w<span class="operator">-</span><span class="operator">></span>setPos(<span class="number">20</span><span class="operator">,</span> <span class="number">20</span>);
w<span class="operator">-</span><span class="operator">></span>setLayout(l);
</pre>
<a name="adding-anchors"></a>
<h2 id="adding-anchors">Adding Anchors</h2>
<pre class="cpp">
<span class="comment">// vertical</span>
l<span class="operator">-</span><span class="operator">></span>addAnchor(a<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorTop<span class="operator">,</span> l<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorTop);
l<span class="operator">-</span><span class="operator">></span>addAnchor(b<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorTop<span class="operator">,</span> l<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorTop);
l<span class="operator">-</span><span class="operator">></span>addAnchor(c<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorTop<span class="operator">,</span> a<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorBottom);
l<span class="operator">-</span><span class="operator">></span>addAnchor(c<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorTop<span class="operator">,</span> b<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorBottom);
l<span class="operator">-</span><span class="operator">></span>addAnchor(c<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorBottom<span class="operator">,</span> d<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorTop);
l<span class="operator">-</span><span class="operator">></span>addAnchor(c<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorBottom<span class="operator">,</span> e<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorTop);
l<span class="operator">-</span><span class="operator">></span>addAnchor(d<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorBottom<span class="operator">,</span> l<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorBottom);
l<span class="operator">-</span><span class="operator">></span>addAnchor(e<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorBottom<span class="operator">,</span> l<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorBottom);
l<span class="operator">-</span><span class="operator">></span>addAnchor(c<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorTop<span class="operator">,</span> f<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorTop);
l<span class="operator">-</span><span class="operator">></span>addAnchor(c<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorVerticalCenter<span class="operator">,</span> f<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorBottom);
l<span class="operator">-</span><span class="operator">></span>addAnchor(f<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorBottom<span class="operator">,</span> g<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorTop);
l<span class="operator">-</span><span class="operator">></span>addAnchor(c<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorBottom<span class="operator">,</span> g<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorBottom);
<span class="comment">// horizontal</span>
l<span class="operator">-</span><span class="operator">></span>addAnchor(l<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorLeft<span class="operator">,</span> a<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorLeft);
l<span class="operator">-</span><span class="operator">></span>addAnchor(l<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorLeft<span class="operator">,</span> d<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorLeft);
l<span class="operator">-</span><span class="operator">></span>addAnchor(a<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorRight<span class="operator">,</span> b<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorLeft);
l<span class="operator">-</span><span class="operator">></span>addAnchor(a<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorRight<span class="operator">,</span> c<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorLeft);
l<span class="operator">-</span><span class="operator">></span>addAnchor(c<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorRight<span class="operator">,</span> e<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorLeft);
l<span class="operator">-</span><span class="operator">></span>addAnchor(b<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorRight<span class="operator">,</span> l<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorRight);
l<span class="operator">-</span><span class="operator">></span>addAnchor(e<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorRight<span class="operator">,</span> l<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorRight);
l<span class="operator">-</span><span class="operator">></span>addAnchor(d<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorRight<span class="operator">,</span> e<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorLeft);
l<span class="operator">-</span><span class="operator">></span>addAnchor(l<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorLeft<span class="operator">,</span> f<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorLeft);
l<span class="operator">-</span><span class="operator">></span>addAnchor(l<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorLeft<span class="operator">,</span> g<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorLeft);
l<span class="operator">-</span><span class="operator">></span>addAnchor(f<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorRight<span class="operator">,</span> g<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorRight);
</pre>
<a name="viewing-the-scene-with-qgraphicsview"></a>
<h2 id="viewing-the-scene-with-qgraphicsview">Viewing the Scene with QGraphicsView</h2>
<pre class="cpp">
scene<span class="operator">.</span>addItem(w);
scene<span class="operator">.</span>setBackgroundBrush(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>darkGreen);
<span class="type"><a href="qgraphicsview.html">QGraphicsView</a></span> view(<span class="operator">&</span>scene);
view<span class="operator">.</span>show();
</pre>
<p>Files:</p>
<ul>
<li><a href="qtwidgets-graphicsview-anchorlayout-anchorlayout-pro.html">graphicsview/anchorlayout/anchorlayout.pro</a></li>
<li><a href="qtwidgets-graphicsview-anchorlayout-main-cpp.html">graphicsview/anchorlayout/main.cpp</a></li>
</ul>
</div>
<p><b>See also </b><a href="qtwidgets-graphicsview-simpleanchorlayout-example.html">Simple Anchor Layout Example</a>.</p>
<!-- @@@graphicsview/anchorlayout -->
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