414 lines
24 KiB
HTML
414 lines
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<h1 class="title">slideshow.cpp Example File</h1>
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<span class="small-subtitle">demos/embedded/fluidlauncher/slideshow.cpp</span>
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<!-- $$$demos/embedded/fluidlauncher/slideshow.cpp-description -->
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<div class="descr"> <a name="details"></a>
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<pre class="cpp"> <span class="comment">/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the demonstration applications of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see http://www.qt.io/terms-conditions. For further
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** information use the contact form at http://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 or version 3 as published by the Free
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** Software Foundation and appearing in the file LICENSE.LGPLv21 and
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** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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** following information to ensure the GNU Lesser General Public License
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** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** As a special exception, The Qt Company gives you certain additional
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** rights. These rights are described in The Qt Company LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/</span>
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<span class="preprocessor">#include <QBasicTimer></span>
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<span class="preprocessor">#include <QList></span>
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<span class="preprocessor">#include <QImage></span>
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<span class="preprocessor">#include <QDir></span>
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<span class="preprocessor">#include <QPainter></span>
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<span class="preprocessor">#include <QPaintEvent></span>
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<span class="preprocessor">#include <QDebug></span>
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<span class="preprocessor">#include "slideshow.h"</span>
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<span class="keyword">class</span> SlideShowPrivate
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{
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<span class="keyword">public</span>:
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SlideShowPrivate();
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<span class="type">int</span> currentSlide;
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<span class="type">int</span> slideInterval;
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<span class="type"><a href="qbasictimer.html">QBasicTimer</a></span> interSlideTimer;
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<span class="type"><a href="qstringlist.html">QStringList</a></span> imagePaths;
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<span class="type">void</span> showNextSlide();
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};
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SlideShowPrivate<span class="operator">::</span>SlideShowPrivate()
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{
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currentSlide <span class="operator">=</span> <span class="number">0</span>;
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slideInterval <span class="operator">=</span> <span class="number">10000</span>; <span class="comment">// Default to 10 sec interval</span>
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}
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<span class="type">void</span> SlideShowPrivate<span class="operator">::</span>showNextSlide()
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{
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currentSlide<span class="operator">+</span><span class="operator">+</span>;
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<span class="keyword">if</span> (currentSlide <span class="operator">></span><span class="operator">=</span> imagePaths<span class="operator">.</span>size())
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currentSlide <span class="operator">=</span> <span class="number">0</span>;
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}
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SlideShow<span class="operator">::</span>SlideShow(<span class="type"><a href="qwidget.html">QWidget</a></span><span class="operator">*</span> parent) :
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<span class="type"><a href="qwidget.html">QWidget</a></span>(parent)
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{
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d <span class="operator">=</span> <span class="keyword">new</span> SlideShowPrivate;
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setAttribute(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>WA_StaticContents<span class="operator">,</span> <span class="keyword">true</span>);
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setAttribute(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>WA_OpaquePaintEvent<span class="operator">,</span> <span class="keyword">true</span>);
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setAttribute(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>WA_NoSystemBackground<span class="operator">,</span> <span class="keyword">true</span>);
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setMouseTracking(<span class="keyword">true</span>);
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}
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SlideShow<span class="operator">::</span><span class="operator">~</span>SlideShow()
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{
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<span class="keyword">delete</span> d;
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}
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<span class="type">void</span> SlideShow<span class="operator">::</span>addImageDir(<span class="type"><a href="qstring.html">QString</a></span> dirName)
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{
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<span class="type"><a href="qdir.html">QDir</a></span> dir(dirName);
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<span class="type"><a href="qstringlist.html">QStringList</a></span> fileNames <span class="operator">=</span> dir<span class="operator">.</span>entryList(<span class="type"><a href="qdir.html">QDir</a></span><span class="operator">::</span>Files <span class="operator">|</span> <span class="type"><a href="qdir.html">QDir</a></span><span class="operator">::</span>Readable<span class="operator">,</span> <span class="type"><a href="qdir.html">QDir</a></span><span class="operator">::</span>Name);
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<span class="keyword">for</span> (<span class="type">int</span> i<span class="operator">=</span><span class="number">0</span>; i<span class="operator"><</span>fileNames<span class="operator">.</span>count(); i<span class="operator">+</span><span class="operator">+</span>)
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d<span class="operator">-</span><span class="operator">></span>imagePaths <span class="operator"><</span><span class="operator"><</span> dir<span class="operator">.</span>absoluteFilePath(fileNames<span class="operator">[</span>i<span class="operator">]</span>);
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}
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<span class="type">void</span> SlideShow<span class="operator">::</span>addImage(<span class="type"><a href="qstring.html">QString</a></span> filename)
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{
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d<span class="operator">-</span><span class="operator">></span>imagePaths <span class="operator"><</span><span class="operator"><</span> filename;
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}
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<span class="type">void</span> SlideShow<span class="operator">::</span>clearImages()
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{
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d<span class="operator">-</span><span class="operator">></span>imagePaths<span class="operator">.</span>clear();
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}
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<span class="type">void</span> SlideShow<span class="operator">::</span>startShow()
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{
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d<span class="operator">-</span><span class="operator">></span>interSlideTimer<span class="operator">.</span>start(d<span class="operator">-</span><span class="operator">></span>slideInterval<span class="operator">,</span> <span class="keyword">this</span>);
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d<span class="operator">-</span><span class="operator">></span>showNextSlide();
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update();
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}
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<span class="type">void</span> SlideShow<span class="operator">::</span>stopShow()
|
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{
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d<span class="operator">-</span><span class="operator">></span>interSlideTimer<span class="operator">.</span>stop();
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}
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<span class="type">int</span> SlideShow<span class="operator">::</span>slideInterval()
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{
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<span class="keyword">return</span> d<span class="operator">-</span><span class="operator">></span>slideInterval;
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}
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<span class="type">void</span> SlideShow<span class="operator">::</span>setSlideInterval(<span class="type">int</span> val)
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{
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d<span class="operator">-</span><span class="operator">></span>slideInterval <span class="operator">=</span> val;
|
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}
|
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|
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<span class="type">void</span> SlideShow<span class="operator">::</span>timerEvent(<span class="type"><a href="qtimerevent.html">QTimerEvent</a></span><span class="operator">*</span> event)
|
|
{
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Q_UNUSED(event);
|
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d<span class="operator">-</span><span class="operator">></span>showNextSlide();
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update();
|
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}
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<span class="type">void</span> SlideShow<span class="operator">::</span>paintEvent(<span class="type"><a href="qpaintevent.html">QPaintEvent</a></span> <span class="operator">*</span>event)
|
|
{
|
|
<span class="type"><a href="qpainter.html">QPainter</a></span> painter(<span class="keyword">this</span>);
|
|
painter<span class="operator">.</span>setRenderHint(<span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>Antialiasing<span class="operator">,</span> <span class="keyword">false</span>);
|
|
|
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<span class="keyword">if</span> (d<span class="operator">-</span><span class="operator">></span>imagePaths<span class="operator">.</span>size() <span class="operator">></span> <span class="number">0</span>) {
|
|
<span class="type"><a href="qpixmap.html">QPixmap</a></span> slide <span class="operator">=</span> <span class="type"><a href="qpixmap.html">QPixmap</a></span>(d<span class="operator">-</span><span class="operator">></span>imagePaths<span class="operator">[</span>d<span class="operator">-</span><span class="operator">></span>currentSlide<span class="operator">]</span>);
|
|
<span class="type"><a href="qsize.html">QSize</a></span> slideSize <span class="operator">=</span> slide<span class="operator">.</span>size();
|
|
<span class="type"><a href="qsize.html">QSize</a></span> scaledSize <span class="operator">=</span> <span class="type"><a href="qsize.html">QSize</a></span>(<a href="qtglobal.html#qMin">qMin</a>(slideSize<span class="operator">.</span>width()<span class="operator">,</span> size()<span class="operator">.</span>width())<span class="operator">,</span>
|
|
<a href="qtglobal.html#qMin">qMin</a>(slideSize<span class="operator">.</span>height()<span class="operator">,</span> size()<span class="operator">.</span>height()));
|
|
<span class="keyword">if</span> (slideSize <span class="operator">!</span><span class="operator">=</span> scaledSize)
|
|
slide <span class="operator">=</span> slide<span class="operator">.</span>scaled(scaledSize<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>KeepAspectRatio);
|
|
|
|
<span class="type"><a href="qrect.html">QRect</a></span> pixmapRect(<a href="qtglobal.html#qMax">qMax</a>( (size()<span class="operator">.</span>width() <span class="operator">-</span> slide<span class="operator">.</span>width())<span class="operator">/</span><span class="number">2</span><span class="operator">,</span> <span class="number">0</span>)<span class="operator">,</span>
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|
<a href="qtglobal.html#qMax">qMax</a>( (size()<span class="operator">.</span>height() <span class="operator">-</span> slide<span class="operator">.</span>height())<span class="operator">/</span><span class="number">2</span><span class="operator">,</span> <span class="number">0</span>)<span class="operator">,</span>
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|
slide<span class="operator">.</span>width()<span class="operator">,</span>
|
|
slide<span class="operator">.</span>height());
|
|
|
|
<span class="keyword">if</span> (pixmapRect<span class="operator">.</span>top() <span class="operator">></span> <span class="number">0</span>) {
|
|
<span class="comment">// Fill in top & bottom rectangles:</span>
|
|
painter<span class="operator">.</span>fillRect(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> size()<span class="operator">.</span>width()<span class="operator">,</span> pixmapRect<span class="operator">.</span>top()<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>black);
|
|
painter<span class="operator">.</span>fillRect(<span class="number">0</span><span class="operator">,</span> pixmapRect<span class="operator">.</span>bottom()<span class="operator">,</span> size()<span class="operator">.</span>width()<span class="operator">,</span> size()<span class="operator">.</span>height()<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>black);
|
|
}
|
|
|
|
<span class="keyword">if</span> (pixmapRect<span class="operator">.</span>left() <span class="operator">></span> <span class="number">0</span>) {
|
|
<span class="comment">// Fill in left & right rectangles:</span>
|
|
painter<span class="operator">.</span>fillRect(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> pixmapRect<span class="operator">.</span>left()<span class="operator">,</span> size()<span class="operator">.</span>height()<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>black);
|
|
painter<span class="operator">.</span>fillRect(pixmapRect<span class="operator">.</span>right()<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> size()<span class="operator">.</span>width()<span class="operator">,</span> size()<span class="operator">.</span>height()<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>black);
|
|
}
|
|
|
|
painter<span class="operator">.</span>drawPixmap(pixmapRect<span class="operator">,</span> slide);
|
|
|
|
} <span class="keyword">else</span>
|
|
painter<span class="operator">.</span>fillRect(event<span class="operator">-</span><span class="operator">></span>rect()<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>black);
|
|
}
|
|
|
|
<span class="type">void</span> SlideShow<span class="operator">::</span>keyPressEvent(<span class="type"><a href="qkeyevent.html">QKeyEvent</a></span><span class="operator">*</span> event)
|
|
{
|
|
Q_UNUSED(event);
|
|
<span class="keyword">emit</span> inputReceived();
|
|
}
|
|
|
|
<span class="type">void</span> SlideShow<span class="operator">::</span>mouseMoveEvent(<span class="type"><a href="qmouseevent.html">QMouseEvent</a></span><span class="operator">*</span> event)
|
|
{
|
|
Q_UNUSED(event);
|
|
<span class="keyword">emit</span> inputReceived();
|
|
}
|
|
|
|
<span class="type">void</span> SlideShow<span class="operator">::</span>mousePressEvent(<span class="type"><a href="qmouseevent.html">QMouseEvent</a></span><span class="operator">*</span> event)
|
|
{
|
|
Q_UNUSED(event);
|
|
<span class="keyword">emit</span> inputReceived();
|
|
}
|
|
|
|
<span class="type">void</span> SlideShow<span class="operator">::</span>mouseReleaseEvent(<span class="type"><a href="qmouseevent.html">QMouseEvent</a></span><span class="operator">*</span> event)
|
|
{
|
|
Q_UNUSED(event);
|
|
<span class="keyword">emit</span> inputReceived();
|
|
}
|
|
|
|
<span class="type">void</span> SlideShow<span class="operator">::</span>showEvent(<span class="type"><a href="qshowevent.html">QShowEvent</a></span> <span class="operator">*</span> event )
|
|
{
|
|
Q_UNUSED(event);
|
|
<span class="preprocessor">#ifndef QT_NO_CURSOR</span>
|
|
setCursor(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>BlankCursor);
|
|
<span class="preprocessor">#endif</span>
|
|
}</pre>
|
|
</div>
|
|
<!-- @@@demos/embedded/fluidlauncher/slideshow.cpp -->
|
|
</div>
|
|
</div>
|
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<p>
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<acronym title="Copyright">©</acronym> 2015 The Qt Company Ltd.
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Documentation contributions included herein are the copyrights of
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their respective owners.</p>
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<br />
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<p>
|
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The documentation provided herein is licensed under the terms of the
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<a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation
|
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License version 1.3</a> as published by the Free Software Foundation.</p>
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<p>
|
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Documentation sources may be obtained from <a href="http://www.qt-project.org">
|
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www.qt-project.org</a>.</p>
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<br />
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<p>
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Qt and respective logos are trademarks of The Qt Company Ltd
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