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<h1 class="title">droparea.cpp Example File</h1>
<span class="small-subtitle">draganddrop/dropsite/droparea.cpp</span>
<!-- $$$draganddrop/dropsite/droparea.cpp-description -->
<div class="descr"> <a name="details"></a>
<pre class="cpp"> <span class="comment">/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
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** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
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** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of The Qt Company Ltd nor the names of its
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** from this software without specific prior written permission.
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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**
** $QT_END_LICENSE$
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****************************************************************************/</span>
<span class="preprocessor">#include &lt;QtGui&gt;</span>
<span class="preprocessor">#include &quot;droparea.h&quot;</span>
DropArea<span class="operator">::</span>DropArea(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent)
: <span class="type"><a href="qlabel.html">QLabel</a></span>(parent)
{
setMinimumSize(<span class="number">200</span><span class="operator">,</span> <span class="number">200</span>);
setFrameStyle(<span class="type"><a href="qframe.html">QFrame</a></span><span class="operator">::</span>Sunken <span class="operator">|</span> <span class="type"><a href="qframe.html">QFrame</a></span><span class="operator">::</span>StyledPanel);
setAlignment(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>AlignCenter);
setAcceptDrops(<span class="keyword">true</span>);
setAutoFillBackground(<span class="keyword">true</span>);
clear();
}
<span class="type">void</span> DropArea<span class="operator">::</span>dragEnterEvent(<span class="type"><a href="qdragenterevent.html">QDragEnterEvent</a></span> <span class="operator">*</span>event)
{
setText(tr(<span class="string">&quot;&lt;drop content&gt;&quot;</span>));
setBackgroundRole(<span class="type"><a href="qpalette.html">QPalette</a></span><span class="operator">::</span>Highlight);
event<span class="operator">-</span><span class="operator">&gt;</span>acceptProposedAction();
<span class="keyword">emit</span> changed(event<span class="operator">-</span><span class="operator">&gt;</span>mimeData());
}
<span class="type">void</span> DropArea<span class="operator">::</span>dragMoveEvent(<span class="type"><a href="qdragmoveevent.html">QDragMoveEvent</a></span> <span class="operator">*</span>event)
{
event<span class="operator">-</span><span class="operator">&gt;</span>acceptProposedAction();
}
<span class="type">void</span> DropArea<span class="operator">::</span>dropEvent(<span class="type"><a href="qdropevent.html">QDropEvent</a></span> <span class="operator">*</span>event)
{
<span class="keyword">const</span> <span class="type"><a href="qmimedata.html">QMimeData</a></span> <span class="operator">*</span>mimeData <span class="operator">=</span> event<span class="operator">-</span><span class="operator">&gt;</span>mimeData();
<span class="keyword">if</span> (mimeData<span class="operator">-</span><span class="operator">&gt;</span>hasImage()) {
setPixmap(qvariant_cast<span class="operator">&lt;</span><span class="type"><a href="qpixmap.html">QPixmap</a></span><span class="operator">&gt;</span>(mimeData<span class="operator">-</span><span class="operator">&gt;</span>imageData()));
} <span class="keyword">else</span> <span class="keyword">if</span> (mimeData<span class="operator">-</span><span class="operator">&gt;</span>hasHtml()) {
setText(mimeData<span class="operator">-</span><span class="operator">&gt;</span>html());
setTextFormat(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>RichText);
} <span class="keyword">else</span> <span class="keyword">if</span> (mimeData<span class="operator">-</span><span class="operator">&gt;</span>hasText()) {
setText(mimeData<span class="operator">-</span><span class="operator">&gt;</span>text());
setTextFormat(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>PlainText);
} <span class="keyword">else</span> <span class="keyword">if</span> (mimeData<span class="operator">-</span><span class="operator">&gt;</span>hasUrls()) {
<span class="type"><a href="qlist.html">QList</a></span><span class="operator">&lt;</span><span class="type"><a href="qurl.html">QUrl</a></span><span class="operator">&gt;</span> urlList <span class="operator">=</span> mimeData<span class="operator">-</span><span class="operator">&gt;</span>urls();
<span class="type"><a href="qstring.html">QString</a></span> text;
<span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator">&lt;</span> urlList<span class="operator">.</span>size() <span class="operator">&amp;</span><span class="operator">&amp;</span> i <span class="operator">&lt;</span> <span class="number">32</span>; <span class="operator">+</span><span class="operator">+</span>i) {
<span class="type"><a href="qstring.html">QString</a></span> url <span class="operator">=</span> urlList<span class="operator">.</span>at(i)<span class="operator">.</span>path();
text <span class="operator">+</span><span class="operator">=</span> url <span class="operator">+</span> <span class="type"><a href="qstring.html">QString</a></span>(<span class="string">&quot;\n&quot;</span>);
}
setText(text);
} <span class="keyword">else</span> {
setText(tr(<span class="string">&quot;Cannot display data&quot;</span>));
}
setBackgroundRole(<span class="type"><a href="qpalette.html">QPalette</a></span><span class="operator">::</span>Dark);
event<span class="operator">-</span><span class="operator">&gt;</span>acceptProposedAction();
}
<span class="type">void</span> DropArea<span class="operator">::</span>dragLeaveEvent(<span class="type"><a href="qdragleaveevent.html">QDragLeaveEvent</a></span> <span class="operator">*</span>event)
{
clear();
event<span class="operator">-</span><span class="operator">&gt;</span>accept();
}
<span class="type">void</span> DropArea<span class="operator">::</span>clear()
{
setText(tr(<span class="string">&quot;&lt;drop content&gt;&quot;</span>));
setBackgroundRole(<span class="type"><a href="qpalette.html">QPalette</a></span><span class="operator">::</span>Dark);
<span class="keyword">emit</span> changed();
}</pre>
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<!-- @@@draganddrop/dropsite/droparea.cpp -->
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