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<h1 class="title">blurpicker.cpp Example File</h1>
<span class="small-subtitle">effects/blurpicker/blurpicker.cpp</span>
<!-- $$$effects/blurpicker/blurpicker.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:
**
** &quot;Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * 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
** contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** &quot;AS IS&quot; AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** 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
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.&quot;
**
** $QT_END_LICENSE$
**
****************************************************************************/</span>
<span class="preprocessor">#include &quot;blurpicker.h&quot;</span>
<span class="preprocessor">#include &lt;QtGui&gt;</span>
<span class="preprocessor">#include &quot;blureffect.h&quot;</span>
<span class="preprocessor">#ifndef M_PI</span>
<span class="preprocessor">#define M_PI 3.14159265358979323846</span>
<span class="preprocessor">#endif</span>
BlurPicker<span class="operator">::</span>BlurPicker(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent): <span class="type"><a href="qgraphicsview.html">QGraphicsView</a></span>(parent)<span class="operator">,</span> m_index(<span class="number">0.0</span>)<span class="operator">,</span> m_animation(<span class="keyword">this</span><span class="operator">,</span> <span class="string">&quot;index&quot;</span>)
{
setBackgroundBrush(<span class="type"><a href="qpixmap.html">QPixmap</a></span>(<span class="string">&quot;:/images/background.jpg&quot;</span>));
setScene(<span class="keyword">new</span> <span class="type"><a href="qgraphicsscene.html">QGraphicsScene</a></span>(<span class="keyword">this</span>));
setupScene();
setIndex(<span class="number">0</span>);
m_animation<span class="operator">.</span>setDuration(<span class="number">400</span>);
m_animation<span class="operator">.</span>setEasingCurve(<span class="type"><a href="qeasingcurve.html">QEasingCurve</a></span><span class="operator">::</span>InOutSine);
setRenderHint(<span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>Antialiasing<span class="operator">,</span> <span class="keyword">true</span>);
setFrameStyle(<span class="type"><a href="qframe.html">QFrame</a></span><span class="operator">::</span>NoFrame);
}
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> BlurPicker<span class="operator">::</span>index() <span class="keyword">const</span>
{
<span class="keyword">return</span> m_index;
}
<span class="type">void</span> BlurPicker<span class="operator">::</span>setIndex(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> index)
{
m_index <span class="operator">=</span> index;
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> baseline <span class="operator">=</span> <span class="number">0</span>;
<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> m_icons<span class="operator">.</span>count(); <span class="operator">+</span><span class="operator">+</span>i) {
<span class="type"><a href="qgraphicsitem.html">QGraphicsItem</a></span> <span class="operator">*</span>icon <span class="operator">=</span> m_icons<span class="operator">[</span>i<span class="operator">]</span>;
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> a <span class="operator">=</span> ((i <span class="operator">+</span> m_index) <span class="operator">*</span> <span class="number">2</span> <span class="operator">*</span> M_PI) <span class="operator">/</span> m_icons<span class="operator">.</span>count();
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> xs <span class="operator">=</span> <span class="number">170</span> <span class="operator">*</span> sin(a);
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> ys <span class="operator">=</span> <span class="number">100</span> <span class="operator">*</span> cos(a);
<span class="type"><a href="qpointf.html">QPointF</a></span> pos(xs<span class="operator">,</span> ys);
pos <span class="operator">=</span> <span class="type"><a href="qtransform.html">QTransform</a></span>()<span class="operator">.</span>rotate(<span class="operator">-</span><span class="number">20</span>)<span class="operator">.</span>map(pos);
pos <span class="operator">-</span><span class="operator">=</span> <span class="type"><a href="qpointf.html">QPointF</a></span>(<span class="number">40</span><span class="operator">,</span> <span class="number">40</span>);
icon<span class="operator">-</span><span class="operator">&gt;</span>setPos(pos);
baseline <span class="operator">=</span> <a href="qtglobal.html#qMax">qMax</a>(baseline<span class="operator">,</span> ys);
<span class="keyword">static_cast</span><span class="operator">&lt;</span>BlurEffect <span class="operator">*</span><span class="operator">&gt;</span>(icon<span class="operator">-</span><span class="operator">&gt;</span>graphicsEffect())<span class="operator">-</span><span class="operator">&gt;</span>setBaseLine(baseline);
}
scene()<span class="operator">-</span><span class="operator">&gt;</span>update();
}
<span class="type">void</span> BlurPicker<span class="operator">::</span>setupScene()
{
scene()<span class="operator">-</span><span class="operator">&gt;</span>setSceneRect(<span class="operator">-</span><span class="number">200</span><span class="operator">,</span> <span class="operator">-</span><span class="number">120</span><span class="operator">,</span> <span class="number">400</span><span class="operator">,</span> <span class="number">240</span>);
<span class="type"><a href="qstringlist.html">QStringList</a></span> names;
names <span class="operator">&lt;</span><span class="operator">&lt;</span> <span class="string">&quot;:/images/accessories-calculator.png&quot;</span>;
names <span class="operator">&lt;</span><span class="operator">&lt;</span> <span class="string">&quot;:/images/accessories-text-editor.png&quot;</span>;
names <span class="operator">&lt;</span><span class="operator">&lt;</span> <span class="string">&quot;:/images/help-browser.png&quot;</span>;
names <span class="operator">&lt;</span><span class="operator">&lt;</span> <span class="string">&quot;:/images/internet-group-chat.png&quot;</span>;
names <span class="operator">&lt;</span><span class="operator">&lt;</span> <span class="string">&quot;:/images/internet-mail.png&quot;</span>;
names <span class="operator">&lt;</span><span class="operator">&lt;</span> <span class="string">&quot;:/images/internet-web-browser.png&quot;</span>;
names <span class="operator">&lt;</span><span class="operator">&lt;</span> <span class="string">&quot;:/images/office-calendar.png&quot;</span>;
names <span class="operator">&lt;</span><span class="operator">&lt;</span> <span class="string">&quot;:/images/system-users.png&quot;</span>;
<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> names<span class="operator">.</span>count(); i<span class="operator">+</span><span class="operator">+</span>) {
<span class="type"><a href="qpixmap.html">QPixmap</a></span> pixmap(names<span class="operator">[</span>i<span class="operator">]</span>);
<span class="type"><a href="qgraphicspixmapitem.html">QGraphicsPixmapItem</a></span> <span class="operator">*</span>icon <span class="operator">=</span> scene()<span class="operator">-</span><span class="operator">&gt;</span>addPixmap(pixmap);
icon<span class="operator">-</span><span class="operator">&gt;</span>setZValue(<span class="number">1</span>);
icon<span class="operator">-</span><span class="operator">&gt;</span>setGraphicsEffect(<span class="keyword">new</span> BlurEffect(icon));
m_icons <span class="operator">&lt;</span><span class="operator">&lt;</span> icon;
}
<span class="type"><a href="qgraphicspixmapitem.html">QGraphicsPixmapItem</a></span> <span class="operator">*</span>bg <span class="operator">=</span> scene()<span class="operator">-</span><span class="operator">&gt;</span>addPixmap(<span class="type"><a href="qpixmap.html">QPixmap</a></span>(<span class="string">&quot;:/images/background.jpg&quot;</span>));
bg<span class="operator">-</span><span class="operator">&gt;</span>setZValue(<span class="number">0</span>);
bg<span class="operator">-</span><span class="operator">&gt;</span>setPos(<span class="operator">-</span><span class="number">200</span><span class="operator">,</span> <span class="operator">-</span><span class="number">150</span>);
}
<span class="type">void</span> BlurPicker<span class="operator">::</span>keyPressEvent(<span class="type"><a href="qkeyevent.html">QKeyEvent</a></span> <span class="operator">*</span>event)
{
<span class="type">int</span> delta <span class="operator">=</span> <span class="number">0</span>;
<span class="keyword">switch</span> (event<span class="operator">-</span><span class="operator">&gt;</span>key())
{
<span class="keyword">case</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_Left:
delta <span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>;
<span class="keyword">break</span>;
<span class="keyword">case</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_Right:
delta <span class="operator">=</span> <span class="number">1</span>;
<span class="keyword">break</span>;
<span class="keyword">default</span>:
<span class="keyword">break</span>;
}
<span class="keyword">if</span> (m_animation<span class="operator">.</span>state() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qabstractanimation.html">QAbstractAnimation</a></span><span class="operator">::</span>Stopped <span class="operator">&amp;</span><span class="operator">&amp;</span> delta) {
m_animation<span class="operator">.</span>setEndValue(m_index <span class="operator">+</span> delta);
m_animation<span class="operator">.</span>start();
event<span class="operator">-</span><span class="operator">&gt;</span>accept();
}
}
<span class="type">void</span> BlurPicker<span class="operator">::</span>resizeEvent(<span class="type"><a href="qresizeevent.html">QResizeEvent</a></span> <span class="operator">*</span><span class="comment">/*event*/</span>)
{
<span class="preprocessor">#if defined(Q_WS_S60) || defined(Q_WS_MAEMO_5) || defined(Q_WS_SIMULATOR)</span>
fitInView(sceneRect()<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>KeepAspectRatio);
<span class="preprocessor">#endif</span>
}
<span class="type">void</span> BlurPicker<span class="operator">::</span>mousePressEvent(<span class="type"><a href="qmouseevent.html">QMouseEvent</a></span> <span class="operator">*</span>event)
{
<span class="type">int</span> delta <span class="operator">=</span> <span class="number">0</span>;
<span class="keyword">if</span>(event<span class="operator">-</span><span class="operator">&gt;</span>x() <span class="operator">&gt;</span> (width() <span class="operator">/</span> <span class="number">2</span>))
{
delta <span class="operator">=</span> <span class="number">1</span>;
}
<span class="keyword">else</span>
{
delta <span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>;
}
<span class="keyword">if</span> (m_animation<span class="operator">.</span>state() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qabstractanimation.html">QAbstractAnimation</a></span><span class="operator">::</span>Stopped <span class="operator">&amp;</span><span class="operator">&amp;</span> delta) {
m_animation<span class="operator">.</span>setEndValue(m_index <span class="operator">+</span> delta);
m_animation<span class="operator">.</span>start();
event<span class="operator">-</span><span class="operator">&gt;</span>accept();
}
}</pre>
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<!-- @@@effects/blurpicker/blurpicker.cpp -->
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