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<h1 class="title">cameraexample.cpp Example File</h1>
<span class="small-subtitle">demos/mobile/qcamera/cameraexample.cpp</span>
<!-- $$$demos/mobile/qcamera/cameraexample.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 demonstration applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "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
** "AS IS" 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."
**
** $QT_END_LICENSE$
**
****************************************************************************/</span>
<span class="preprocessor">#include "cameraexample.h"</span>
<span class="preprocessor">#include "messagehandling.h"</span>
<span class="preprocessor">#include "contactsdlg.h"</span>
<span class="preprocessor">#include "button.h"</span>
<span class="preprocessor">#include "businesscardhandling.h"</span>
<span class="preprocessor">#include <QDebug></span>
<span class="comment">/*****************************************************************************
* MyVideoSurface
*/</span>
MyVideoSurface<span class="operator">::</span>MyVideoSurface(<span class="type"><a href="qwidget.html">QWidget</a></span><span class="operator">*</span> widget<span class="operator">,</span> VideoIF<span class="operator">*</span> target<span class="operator">,</span> <span class="type"><a href="qobject.html">QObject</a></span><span class="operator">*</span> parent)
: <span class="type"><a href="qabstractvideosurface.html">QAbstractVideoSurface</a></span>(parent)
{
m_targetWidget <span class="operator">=</span> widget;
m_target <span class="operator">=</span> target;
m_imageFormat <span class="operator">=</span> <span class="type"><a href="qimage.html">QImage</a></span><span class="operator">::</span>Format_Invalid;
}
MyVideoSurface<span class="operator">::</span><span class="operator">~</span>MyVideoSurface()
{
}
<span class="type">bool</span> MyVideoSurface<span class="operator">::</span>start(<span class="keyword">const</span> <span class="type"><a href="qvideosurfaceformat.html">QVideoSurfaceFormat</a></span> <span class="operator">&</span>format)
{
m_videoFormat <span class="operator">=</span> format;
<span class="keyword">const</span> <span class="type"><a href="qimage.html">QImage</a></span><span class="operator">::</span>Format imageFormat <span class="operator">=</span> <span class="type"><a href="qvideoframe.html">QVideoFrame</a></span><span class="operator">::</span>imageFormatFromPixelFormat(format<span class="operator">.</span>pixelFormat());
<span class="keyword">const</span> <span class="type"><a href="qsize.html">QSize</a></span> size <span class="operator">=</span> format<span class="operator">.</span>frameSize();
<span class="keyword">if</span> (imageFormat <span class="operator">!</span><span class="operator">=</span> <span class="type"><a href="qimage.html">QImage</a></span><span class="operator">::</span>Format_Invalid <span class="operator">&</span><span class="operator">&</span> <span class="operator">!</span>size<span class="operator">.</span>isEmpty()) {
m_imageFormat <span class="operator">=</span> imageFormat;
<span class="type"><a href="qabstractvideosurface.html">QAbstractVideoSurface</a></span><span class="operator">::</span>start(format);
<span class="keyword">return</span> <span class="keyword">true</span>;
} <span class="keyword">else</span> {
<span class="keyword">return</span> <span class="keyword">false</span>;
}
}
<span class="type">bool</span> MyVideoSurface<span class="operator">::</span>present(<span class="keyword">const</span> <span class="type"><a href="qvideoframe.html">QVideoFrame</a></span> <span class="operator">&</span>frame)
{
m_frame <span class="operator">=</span> frame;
<span class="keyword">if</span> (surfaceFormat()<span class="operator">.</span>pixelFormat() <span class="operator">!</span><span class="operator">=</span> m_frame<span class="operator">.</span>pixelFormat() <span class="operator">|</span><span class="operator">|</span>
surfaceFormat()<span class="operator">.</span>frameSize() <span class="operator">!</span><span class="operator">=</span> m_frame<span class="operator">.</span>size()) {
stop();
<span class="keyword">return</span> <span class="keyword">false</span>;
} <span class="keyword">else</span> {
m_target<span class="operator">-</span><span class="operator">></span>updateVideo();
<span class="keyword">return</span> <span class="keyword">true</span>;
}
}
<span class="type">void</span> MyVideoSurface<span class="operator">::</span>paint(<span class="type"><a href="qpainter.html">QPainter</a></span> <span class="operator">*</span>painter)
{
<span class="keyword">if</span> (m_frame<span class="operator">.</span>map(<span class="type"><a href="qabstractvideobuffer.html">QAbstractVideoBuffer</a></span><span class="operator">::</span>ReadOnly)) {
<span class="type"><a href="qimage.html">QImage</a></span> image(
m_frame<span class="operator">.</span>bits()<span class="operator">,</span>
m_frame<span class="operator">.</span>width()<span class="operator">,</span>
m_frame<span class="operator">.</span>height()<span class="operator">,</span>
m_frame<span class="operator">.</span>bytesPerLine()<span class="operator">,</span>
m_imageFormat);
<span class="type"><a href="qrect.html">QRect</a></span> r <span class="operator">=</span> m_targetWidget<span class="operator">-</span><span class="operator">></span>rect();
<span class="type"><a href="qpoint.html">QPoint</a></span> centerPic((<a href="qtglobal.html#qAbs">qAbs</a>(r<span class="operator">.</span>size()<span class="operator">.</span>width() <span class="operator">-</span> image<span class="operator">.</span>size()<span class="operator">.</span>width())) <span class="operator">/</span> <span class="number">2</span><span class="operator">,</span> (<a href="qtglobal.html#qAbs">qAbs</a>(
r<span class="operator">.</span>size()<span class="operator">.</span>height() <span class="operator">-</span> image<span class="operator">.</span>size()<span class="operator">.</span>height())) <span class="operator">/</span> <span class="number">2</span>);
<span class="keyword">if</span> (<span class="operator">!</span>image<span class="operator">.</span>isNull()) {
painter<span class="operator">-</span><span class="operator">></span>drawImage(centerPic<span class="operator">,</span>image);
}
m_frame<span class="operator">.</span>unmap();
}
}
<span class="type"><a href="qlist.html">QList</a></span><span class="operator"><</span><span class="type"><a href="qvideoframe.html">QVideoFrame</a></span><span class="operator">::</span>PixelFormat<span class="operator">></span> MyVideoSurface<span class="operator">::</span>supportedPixelFormats(
<span class="type"><a href="qabstractvideobuffer.html">QAbstractVideoBuffer</a></span><span class="operator">::</span>HandleType handleType) <span class="keyword">const</span>
{
<span class="keyword">if</span> (handleType <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qabstractvideobuffer.html">QAbstractVideoBuffer</a></span><span class="operator">::</span>NoHandle) {
<span class="keyword">return</span> <span class="type"><a href="qlist.html">QList</a></span><span class="operator"><</span><span class="type"><a href="qvideoframe.html">QVideoFrame</a></span><span class="operator">::</span>PixelFormat<span class="operator">></span>()
<span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qvideoframe.html">QVideoFrame</a></span><span class="operator">::</span>Format_RGB32
<span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qvideoframe.html">QVideoFrame</a></span><span class="operator">::</span>Format_ARGB32
<span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qvideoframe.html">QVideoFrame</a></span><span class="operator">::</span>Format_ARGB32_Premultiplied
<span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qvideoframe.html">QVideoFrame</a></span><span class="operator">::</span>Format_RGB565
<span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qvideoframe.html">QVideoFrame</a></span><span class="operator">::</span>Format_RGB555;
} <span class="keyword">else</span> {
<span class="keyword">return</span> <span class="type"><a href="qlist.html">QList</a></span><span class="operator"><</span><span class="type"><a href="qvideoframe.html">QVideoFrame</a></span><span class="operator">::</span>PixelFormat<span class="operator">></span>();
}
}
<span class="comment">/*****************************************************************************
* CameraExample
*/</span>
CameraExample<span class="operator">::</span>CameraExample(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent) :
<span class="type"><a href="qmainwindow.html">QMainWindow</a></span>(parent)
{
setWindowTitle(<span class="string">"QCameraExample"</span>);
<span class="comment">// Opitimizations for screen update and drawing qwidget</span>
setAutoFillBackground(<span class="keyword">false</span>);
<span class="comment">// Prevent to screensaver to activate</span>
m_systemScreenSaver <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QSystemScreenSaver</span>(<span class="keyword">this</span>);
m_systemScreenSaver<span class="operator">-</span><span class="operator">></span>setScreenSaverInhibit();
m_myVideoSurface <span class="operator">=</span> <span class="number">0</span>;
pictureCaptured <span class="operator">=</span> <span class="keyword">false</span>;
showViewFinder <span class="operator">=</span> <span class="keyword">false</span>;
m_focusing <span class="operator">=</span> <span class="keyword">false</span>;
<span class="comment">// MMS handling</span>
m_message <span class="operator">=</span> <span class="keyword">new</span> Message(<span class="keyword">this</span>);
<span class="type"><a href="qobject.html">QObject</a></span><span class="operator">::</span>connect(m_message<span class="operator">,</span> SIGNAL(messageStateChanged(<span class="type">int</span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(messageStateChanged(<span class="type">int</span>)));
<span class="type"><a href="qobject.html">QObject</a></span><span class="operator">::</span>connect(m_message<span class="operator">,</span> SIGNAL(messageReceived(<span class="type"><a href="qstring.html">QString</a></span><span class="operator">,</span><span class="type"><a href="qstring.html">QString</a></span><span class="operator">,</span><span class="type"><a href="qpixmap.html">QPixmap</a></span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(messageReceived(<span class="type"><a href="qstring.html">QString</a></span><span class="operator">,</span><span class="type"><a href="qstring.html">QString</a></span><span class="operator">,</span><span class="type"><a href="qpixmap.html">QPixmap</a></span>)));
<span class="comment">// Business card handling (Contact's avatar picture)</span>
m_businessCardHandling <span class="operator">=</span> <span class="keyword">new</span> BusinessCardHandling(<span class="keyword">this</span>);
<span class="comment">// Black background</span>
<span class="type"><a href="qpalette.html">QPalette</a></span> palette <span class="operator">=</span> <span class="keyword">this</span><span class="operator">-</span><span class="operator">></span>palette();
palette<span class="operator">.</span>setColor(<span class="type"><a href="qpalette.html">QPalette</a></span><span class="operator">::</span>Background<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>black);
setPalette(palette);
<span class="comment">// Main widget & layout</span>
<span class="type"><a href="qwidget.html">QWidget</a></span><span class="operator">*</span> mainWidget <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qwidget.html">QWidget</a></span>(<span class="keyword">this</span>);
mainWidget<span class="operator">-</span><span class="operator">></span>setPalette(palette);
<span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span><span class="operator">*</span> hboxl <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span>;
hboxl<span class="operator">-</span><span class="operator">></span>setSpacing(<span class="number">0</span>);
hboxl<span class="operator">-</span><span class="operator">></span>setMargin(<span class="number">0</span>);
<span class="comment">// UI stack</span>
m_stackedWidget <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qstackedwidget.html">QStackedWidget</a></span>();
m_stackedWidget<span class="operator">-</span><span class="operator">></span>setPalette(palette);
<span class="comment">// First widget to stack</span>
m_videoWidget <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qwidget.html">QWidget</a></span>();
m_videoWidget<span class="operator">-</span><span class="operator">></span>setPalette(palette);
m_stackedWidget<span class="operator">-</span><span class="operator">></span>addWidget(m_videoWidget);
<span class="comment">// Second widget to stack</span>
<span class="type"><a href="qwidget.html">QWidget</a></span><span class="operator">*</span> secondWidget <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qwidget.html">QWidget</a></span>(<span class="keyword">this</span>);
secondWidget<span class="operator">-</span><span class="operator">></span>setPalette(palette);
m_stackedWidget<span class="operator">-</span><span class="operator">></span>addWidget(secondWidget);
m_stackedWidget<span class="operator">-</span><span class="operator">></span>setCurrentIndex(<span class="number">0</span>);
hboxl<span class="operator">-</span><span class="operator">></span>addWidget(m_stackedWidget);
<span class="comment">// Buttons</span>
<span class="type"><a href="qsize.html">QSize</a></span> iconSize(<span class="number">80</span><span class="operator">,</span> <span class="number">80</span>);
<span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span><span class="operator">*</span> vboxl <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>;
vboxl<span class="operator">-</span><span class="operator">></span>setSpacing(<span class="number">0</span>);
vboxl<span class="operator">-</span><span class="operator">></span>setMargin(<span class="number">0</span>);
<span class="comment">// Exit button</span>
m_exit <span class="operator">=</span> <span class="keyword">new</span> Button(<span class="keyword">this</span>);
<span class="type"><a href="qobject.html">QObject</a></span><span class="operator">::</span>connect(m_exit<span class="operator">,</span> SIGNAL(pressed())<span class="operator">,</span> qApp<span class="operator">,</span> SLOT(quit()));
<span class="type"><a href="qpixmap.html">QPixmap</a></span> p <span class="operator">=</span> <span class="type"><a href="qpixmap.html">QPixmap</a></span>(<span class="string">":/icons/exit.png"</span>);
m_exit<span class="operator">-</span><span class="operator">></span>setPixmap(p<span class="operator">.</span>scaled(iconSize<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>KeepAspectRatio<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>SmoothTransformation));
vboxl<span class="operator">-</span><span class="operator">></span>addWidget(m_exit);
vboxl<span class="operator">-</span><span class="operator">></span>setAlignment(m_exit<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>AlignHCenter <span class="operator">|</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>AlignTop);
<span class="comment">// Camera button</span>
m_cameraBtn <span class="operator">=</span> <span class="keyword">new</span> Button(<span class="keyword">this</span>);
<span class="type"><a href="qobject.html">QObject</a></span><span class="operator">::</span>connect(m_cameraBtn<span class="operator">,</span> SIGNAL(pressed())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(searchAndLock()));
p <span class="operator">=</span> <span class="type"><a href="qpixmap.html">QPixmap</a></span>(<span class="string">":/icons/camera.png"</span>);
m_cameraBtn<span class="operator">-</span><span class="operator">></span>setPixmap(p<span class="operator">.</span>scaled(iconSize<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>KeepAspectRatio<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>SmoothTransformation));
vboxl<span class="operator">-</span><span class="operator">></span>addWidget(m_cameraBtn);
vboxl<span class="operator">-</span><span class="operator">></span>setAlignment(m_cameraBtn<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>AlignCenter);
<span class="comment">// Send MMS button</span>
m_mms <span class="operator">=</span> <span class="keyword">new</span> Button(<span class="keyword">this</span>);
<span class="type"><a href="qobject.html">QObject</a></span><span class="operator">::</span>connect(m_mms<span class="operator">,</span> SIGNAL(pressed())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(openContactsDlg()));
p <span class="operator">=</span> <span class="type"><a href="qpixmap.html">QPixmap</a></span>(<span class="string">":/icons/mms.png"</span>);
m_mms<span class="operator">-</span><span class="operator">></span>setPixmap(p<span class="operator">.</span>scaled(iconSize<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>KeepAspectRatio<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>SmoothTransformation));
vboxl<span class="operator">-</span><span class="operator">></span>addWidget(m_mms);
vboxl<span class="operator">-</span><span class="operator">></span>setAlignment(m_mms<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>AlignHCenter <span class="operator">|</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>AlignBottom);
<span class="preprocessor">#ifndef MESSAGING_ENABLED</span>
m_mms<span class="operator">-</span><span class="operator">></span>disableBtn(<span class="keyword">true</span>);
m_mms<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>);
<span class="preprocessor">#endif</span>
hboxl<span class="operator">-</span><span class="operator">></span>addLayout(vboxl);
mainWidget<span class="operator">-</span><span class="operator">></span>setLayout(hboxl);
setCentralWidget(mainWidget);
<span class="comment">// Enable camera after 1s, so that the application is started</span>
<span class="comment">// and widget is created to landscape orientation</span>
<span class="type"><a href="qtimer.html">QTimer</a></span><span class="operator">::</span>singleShot(<span class="number">1000</span><span class="operator">,</span><span class="keyword">this</span><span class="operator">,</span>SLOT(enableCamera()));
}
CameraExample<span class="operator">::</span><span class="operator">~</span>CameraExample()
{
<span class="keyword">if</span> (m_myVideoSurface)
m_myVideoSurface<span class="operator">-</span><span class="operator">></span>stop();
m_camera<span class="operator">-</span><span class="operator">></span>stop();
<span class="keyword">delete</span> m_stackedWidget;
<span class="keyword">delete</span> m_stillImageCapture;
<span class="keyword">delete</span> m_camera;
}
<span class="type">void</span> CameraExample<span class="operator">::</span>enableCamera()
{
m_camera <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QCamera</span>();
m_camera<span class="operator">-</span><span class="operator">></span>setCaptureMode(<span class="type">QCamera</span><span class="operator">::</span>CaptureStillImage);
connect(m_camera<span class="operator">,</span> SIGNAL(error(<span class="type">QCamera</span><span class="operator">::</span>Error))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(error(<span class="type">QCamera</span><span class="operator">::</span>Error)));
connect(m_camera<span class="operator">,</span> SIGNAL(lockStatusChanged(<span class="type">QCamera</span><span class="operator">::</span>LockStatus<span class="operator">,</span><span class="type">QCamera</span><span class="operator">::</span>LockChangeReason))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(lockStatusChanged(<span class="type">QCamera</span><span class="operator">::</span>LockStatus<span class="operator">,</span><span class="type">QCamera</span><span class="operator">::</span>LockChangeReason)));
<span class="comment">// Own video output drawing that shows camera view finder pictures</span>
<span class="type">QMediaService</span><span class="operator">*</span> ms <span class="operator">=</span> m_camera<span class="operator">-</span><span class="operator">></span>service();
<span class="type">QVideoRendererControl</span><span class="operator">*</span> vrc <span class="operator">=</span> ms<span class="operator">-</span><span class="operator">></span>requestControl<span class="operator"><</span><span class="type">QVideoRendererControl</span><span class="operator">*</span><span class="operator">></span>();
m_myVideoSurface <span class="operator">=</span> <span class="keyword">new</span> MyVideoSurface(<span class="keyword">this</span><span class="operator">,</span><span class="keyword">this</span><span class="operator">,</span><span class="keyword">this</span>);
vrc<span class="operator">-</span><span class="operator">></span>setSurface(m_myVideoSurface);
<span class="comment">// Image capturer</span>
m_stillImageCapture <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QCameraImageCapture</span>(m_camera);
connect(m_stillImageCapture<span class="operator">,</span> SIGNAL(imageCaptured(<span class="type">int</span><span class="operator">,</span><span class="type"><a href="qimage.html">QImage</a></span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(imageCaptured(<span class="type">int</span><span class="operator">,</span><span class="type"><a href="qimage.html">QImage</a></span>)));
<span class="comment">// Start camera</span>
<span class="keyword">if</span> (m_camera<span class="operator">-</span><span class="operator">></span>state() <span class="operator">=</span><span class="operator">=</span> <span class="type">QCamera</span><span class="operator">::</span>ActiveState) {
m_camera<span class="operator">-</span><span class="operator">></span>stop();
}
m_videoWidget<span class="operator">-</span><span class="operator">></span>show();
m_camera<span class="operator">-</span><span class="operator">></span>start();
showViewFinder <span class="operator">=</span> <span class="keyword">true</span>;
}
<span class="type">void</span> CameraExample<span class="operator">::</span>mousePressEvent(<span class="type"><a href="qmouseevent.html">QMouseEvent</a></span> <span class="operator">*</span>event)
{
<span class="type"><a href="qmainwindow.html">QMainWindow</a></span><span class="operator">::</span>mousePressEvent(event);
<span class="keyword">if</span> (pictureCaptured) {
<span class="comment">// Starting view finder</span>
pictureCaptured <span class="operator">=</span> <span class="keyword">false</span>;
m_stackedWidget<span class="operator">-</span><span class="operator">></span>setCurrentIndex(<span class="number">0</span>);
<span class="keyword">if</span> (m_myVideoSurface) {
showViewFinder <span class="operator">=</span> <span class="keyword">true</span>;
}
}
}
<span class="type">void</span> CameraExample<span class="operator">::</span>searchAndLock()
{
m_focusing <span class="operator">=</span> <span class="keyword">false</span>;
m_focusMessage<span class="operator">.</span>clear();
<span class="keyword">if</span> (pictureCaptured) {
<span class="comment">// Starting view finder again</span>
pictureCaptured <span class="operator">=</span> <span class="keyword">false</span>;
m_stackedWidget<span class="operator">-</span><span class="operator">></span>setCurrentIndex(<span class="number">0</span>);
<span class="keyword">if</span> (m_myVideoSurface) {
showViewFinder <span class="operator">=</span> <span class="keyword">true</span>;
}
}
<span class="keyword">else</span> {
<span class="comment">// Search and lock picture (=focus)</span>
<span class="keyword">if</span> (m_camera<span class="operator">-</span><span class="operator">></span>supportedLocks() <span class="operator">&</span> <span class="type">QCamera</span><span class="operator">::</span>LockFocus) {
m_focusing <span class="operator">=</span> <span class="keyword">true</span>;
m_focusMessage <span class="operator">=</span> <span class="string">"Focusing..."</span>;
m_camera<span class="operator">-</span><span class="operator">></span>searchAndLock(<span class="type">QCamera</span><span class="operator">::</span>LockFocus);
} <span class="keyword">else</span> {
<span class="comment">// No focus functionality, take picture right away</span>
captureImage();
}
}
}
<span class="type">void</span> CameraExample<span class="operator">::</span>lockStatusChanged(<span class="type">QCamera</span><span class="operator">::</span>LockStatus status<span class="operator">,</span> <span class="type">QCamera</span><span class="operator">::</span>LockChangeReason reason)
{
<span class="keyword">if</span> (status <span class="operator">=</span><span class="operator">=</span> <span class="type">QCamera</span><span class="operator">::</span>Locked) {
<span class="keyword">if</span> (reason <span class="operator">=</span><span class="operator">=</span> <span class="type">QCamera</span><span class="operator">::</span>LockAcquired) {
<span class="comment">// Focus locked</span>
m_focusMessage<span class="operator">.</span>clear();
m_focusing <span class="operator">=</span> <span class="keyword">false</span>;
<span class="comment">// Capture new image</span>
captureImage();
<span class="comment">// Unlock camera</span>
m_camera<span class="operator">-</span><span class="operator">></span>unlock();
} <span class="keyword">else</span> {
<span class="keyword">if</span> (m_focusing)
m_focusMessage <span class="operator">=</span> <span class="string">"No focus, try again"</span>;
}
} <span class="keyword">else</span> <span class="keyword">if</span> (status <span class="operator">=</span><span class="operator">=</span> <span class="type">QCamera</span><span class="operator">::</span>Unlocked <span class="operator">&</span><span class="operator">&</span> m_focusing) {
m_focusMessage <span class="operator">=</span> <span class="string">"No focus, try again"</span>;
}
}
<span class="type">void</span> CameraExample<span class="operator">::</span>captureImage()
{
<span class="keyword">if</span> (pictureCaptured) {
<span class="comment">// Starting view finder again</span>
pictureCaptured <span class="operator">=</span> <span class="keyword">false</span>;
m_stackedWidget<span class="operator">-</span><span class="operator">></span>setCurrentIndex(<span class="number">0</span>);
showViewFinder <span class="operator">=</span> <span class="keyword">true</span>;
}
<span class="keyword">else</span> {
<span class="comment">// Capturing image</span>
showViewFinder <span class="operator">=</span> <span class="keyword">false</span>;
<span class="comment">// Get picture location where to store captured images</span>
<span class="type"><a href="qstring.html">QString</a></span> path(<span class="type"><a href="qdesktopservices.html">QDesktopServices</a></span><span class="operator">::</span>storageLocation(<span class="type"><a href="qdesktopservices.html">QDesktopServices</a></span><span class="operator">::</span>PicturesLocation));
<span class="type"><a href="qdir.html">QDir</a></span> dir(path);
<span class="comment">// Get next filename</span>
<span class="type"><a href="qstringlist.html">QStringList</a></span> files <span class="operator">=</span> dir<span class="operator">.</span>entryList(<span class="type"><a href="qstringlist.html">QStringList</a></span>() <span class="operator"><</span><span class="operator"><</span> <span class="string">"camera_*.jpg"</span>);
<span class="type">int</span> lastImage <span class="operator">=</span> <span class="number">0</span>;
foreach ( <span class="type"><a href="qstring.html">QString</a></span> fileName<span class="operator">,</span> files ) {
<span class="type">int</span> imgNumber <span class="operator">=</span> fileName<span class="operator">.</span>mid(<span class="number">7</span><span class="operator">,</span> fileName<span class="operator">.</span>size() <span class="operator">-</span> <span class="number">11</span>)<span class="operator">.</span>toInt();
lastImage <span class="operator">=</span> <a href="qtglobal.html#qMax">qMax</a>(lastImage<span class="operator">,</span> imgNumber);
}
<span class="comment">// Capture image</span>
<span class="keyword">if</span> (m_stillImageCapture<span class="operator">-</span><span class="operator">></span>isReadyForCapture()) {
m_imageName <span class="operator">=</span> <span class="type"><a href="qstring.html">QString</a></span>(<span class="string">"camera_%1.jpg"</span>)<span class="operator">.</span>arg(lastImage<span class="operator">+</span><span class="number">1</span>);
m_stillImageCapture<span class="operator">-</span><span class="operator">></span>capture(m_imageName);
}
}
}
<span class="type">void</span> CameraExample<span class="operator">::</span>imageCaptured(<span class="type">int</span> id<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qimage.html">QImage</a></span> <span class="operator">&</span>preview)
{
showViewFinder <span class="operator">=</span> <span class="keyword">false</span>;
m_focusing <span class="operator">=</span> <span class="keyword">false</span>;
<span class="comment">// Image captured, show it to the user</span>
m_stackedWidget<span class="operator">-</span><span class="operator">></span>setCurrentIndex(<span class="number">1</span>);
<span class="comment">// Get picture location</span>
<span class="type"><a href="qstring.html">QString</a></span> path(<span class="type"><a href="qdesktopservices.html">QDesktopServices</a></span><span class="operator">::</span>storageLocation(<span class="type"><a href="qdesktopservices.html">QDesktopServices</a></span><span class="operator">::</span>PicturesLocation));
m_imageName<span class="operator">.</span>prepend(path <span class="operator">+</span> <span class="string">"/"</span>);
m_capturedImage <span class="operator">=</span> preview;
<span class="comment">// Set suitable size to the image</span>
<span class="type"><a href="qsize.html">QSize</a></span> s <span class="operator">=</span> m_videoWidget<span class="operator">-</span><span class="operator">></span>size();
s <span class="operator">=</span> s <span class="operator">-</span> <span class="type"><a href="qsize.html">QSize</a></span>(<span class="number">20</span><span class="operator">,</span> <span class="number">20</span>);
m_capturedImage <span class="operator">=</span> m_capturedImage<span class="operator">.</span>scaled(s<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>KeepAspectRatio<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>SmoothTransformation);
pictureCaptured <span class="operator">=</span> <span class="keyword">true</span>;
update();
}
<span class="type">void</span> CameraExample<span class="operator">::</span>error(<span class="type">QCamera</span><span class="operator">::</span>Error e)
{
<span class="keyword">switch</span> (e) {
<span class="keyword">case</span> <span class="type">QCamera</span><span class="operator">::</span>NoError:
{
<span class="keyword">break</span>;
}
<span class="keyword">case</span> <span class="type">QCamera</span><span class="operator">::</span>CameraError:
{
<span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>warning(<span class="keyword">this</span><span class="operator">,</span> <span class="string">"QCameraExample"</span><span class="operator">,</span> <span class="string">"General Camera error"</span>);
<span class="keyword">break</span>;
}
<span class="keyword">case</span> <span class="type">QCamera</span><span class="operator">::</span>InvalidRequestError:
{
<span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>warning(<span class="keyword">this</span><span class="operator">,</span> <span class="string">"QCameraExample"</span><span class="operator">,</span> <span class="string">"Camera invalid request error"</span>);
<span class="keyword">break</span>;
}
<span class="keyword">case</span> <span class="type">QCamera</span><span class="operator">::</span>ServiceMissingError:
{
<span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>warning(<span class="keyword">this</span><span class="operator">,</span> <span class="string">"QCameraExample"</span><span class="operator">,</span> <span class="string">"Camera service missing error"</span>);
<span class="keyword">break</span>;
}
<span class="keyword">case</span> <span class="type">QCamera</span><span class="operator">::</span>NotSupportedFeatureError :
{
<span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>warning(<span class="keyword">this</span><span class="operator">,</span> <span class="string">"QCameraExample"</span><span class="operator">,</span> <span class="string">"Camera not supported error"</span>);
<span class="keyword">break</span>;
}
};
}
<span class="type">void</span> CameraExample<span class="operator">::</span>openContactsDlg()
{
<span class="comment">// Open dialog for showing contacts</span>
<span class="keyword">if</span> (<span class="operator">!</span>m_contactsDialog) {
<span class="keyword">if</span> (m_capturedImage<span class="operator">.</span>isNull()) {
<span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>information(<span class="keyword">this</span><span class="operator">,</span> <span class="string">"QCameraExample"</span><span class="operator">,</span> <span class="string">"Take picture first"</span>);
<span class="keyword">return</span>;
}
<span class="comment">// Show dialog</span>
m_contactsDialog <span class="operator">=</span> <span class="keyword">new</span> ContactsDialog(<span class="keyword">this</span>);
<span class="type"><a href="qobject.html">QObject</a></span><span class="operator">::</span>connect(m_contactsDialog<span class="operator">,</span> SIGNAL(contactSelected(<span class="type"><a href="qstring.html">QString</a></span>))<span class="operator">,</span>
<span class="keyword">this</span><span class="operator">,</span> SLOT(contactSelected(<span class="type"><a href="qstring.html">QString</a></span>)));
m_contactsDialog<span class="operator">-</span><span class="operator">></span>exec();
<span class="type"><a href="qobject.html">QObject</a></span><span class="operator">::</span>disconnect(m_contactsDialog<span class="operator">,</span> SIGNAL(contactSelected(<span class="type"><a href="qstring.html">QString</a></span>))<span class="operator">,</span>
<span class="keyword">this</span><span class="operator">,</span> SLOT(contactSelected(<span class="type"><a href="qstring.html">QString</a></span>)));
<span class="keyword">delete</span> m_contactsDialog;
m_contactsDialog <span class="operator">=</span> <span class="number">0</span>;
}
}
<span class="type">void</span> CameraExample<span class="operator">::</span>contactSelected(<span class="type"><a href="qstring.html">QString</a></span> phoneNumber)
{
m_phoneNumber <span class="operator">=</span> phoneNumber;
<span class="type"><a href="qtimer.html">QTimer</a></span><span class="operator">::</span>singleShot(<span class="number">1000</span><span class="operator">,</span><span class="keyword">this</span><span class="operator">,</span>SLOT(sendMMS()));
}
<span class="type">void</span> CameraExample<span class="operator">::</span>sendMMS()
{
<span class="preprocessor">#ifdef MESSAGING_ENABLED</span>
m_message<span class="operator">-</span><span class="operator">></span>sendMMS(m_imageName<span class="operator">,</span> m_phoneNumber);
<span class="preprocessor">#endif</span>
}
<span class="type">void</span> CameraExample<span class="operator">::</span>messageStateChanged(<span class="type">int</span> <span class="comment">/*error*/</span>)
{
}
<span class="type">void</span> CameraExample<span class="operator">::</span>updateVideo()
{
<span class="keyword">if</span> (showViewFinder) {
repaint();
}
}
<span class="type">void</span> CameraExample<span class="operator">::</span>paintEvent(<span class="type"><a href="qpaintevent.html">QPaintEvent</a></span> <span class="operator">*</span>event)
{
<span class="comment">//QMainWindow::paintEvent(event);</span>
<span class="type"><a href="qpainter.html">QPainter</a></span> painter(<span class="keyword">this</span>);
<span class="type"><a href="qrect.html">QRect</a></span> r <span class="operator">=</span> <span class="keyword">this</span><span class="operator">-</span><span class="operator">></span>rect();
<span class="type"><a href="qfont.html">QFont</a></span> font <span class="operator">=</span> painter<span class="operator">.</span>font();
font<span class="operator">.</span>setPixelSize(<span class="number">20</span>);
painter<span class="operator">.</span>setFont(font);
painter<span class="operator">.</span>setPen(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>white);
<span class="keyword">if</span> (showViewFinder <span class="operator">&</span><span class="operator">&</span> m_myVideoSurface <span class="operator">&</span><span class="operator">&</span> m_myVideoSurface<span class="operator">-</span><span class="operator">></span>isActive()) {
<span class="comment">// Show view finder</span>
m_myVideoSurface<span class="operator">-</span><span class="operator">></span>paint(<span class="operator">&</span>painter);
<span class="comment">// Paint focus message</span>
<span class="keyword">if</span> (<span class="operator">!</span>m_focusMessage<span class="operator">.</span>isEmpty())
painter<span class="operator">.</span>drawText(r<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>AlignCenter<span class="operator">,</span> m_focusMessage);
} <span class="keyword">else</span> {
<span class="comment">// Draw black</span>
painter<span class="operator">.</span>fillRect(event<span class="operator">-</span><span class="operator">></span>rect()<span class="operator">,</span> palette()<span class="operator">.</span>background());
<span class="comment">// Show captured image</span>
<span class="keyword">if</span> (pictureCaptured) {
<span class="comment">// Paint captured image</span>
<span class="type"><a href="qpoint.html">QPoint</a></span> centerPic((<a href="qtglobal.html#qAbs">qAbs</a>(r<span class="operator">.</span>size()<span class="operator">.</span>width() <span class="operator">-</span> m_capturedImage<span class="operator">.</span>size()<span class="operator">.</span>width())) <span class="operator">/</span> <span class="number">2</span><span class="operator">,</span> (<a href="qtglobal.html#qAbs">qAbs</a>(
r<span class="operator">.</span>size()<span class="operator">.</span>height() <span class="operator">-</span> m_capturedImage<span class="operator">.</span>size()<span class="operator">.</span>height())) <span class="operator">/</span> <span class="number">2</span>);
painter<span class="operator">.</span>drawImage(centerPic<span class="operator">,</span> m_capturedImage);
<span class="comment">// Paint filename</span>
painter<span class="operator">.</span>drawText(r<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>AlignBottom <span class="operator">|</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>AlignCenter<span class="operator">,</span> m_imageName);
}
}
}
<span class="type">void</span> CameraExample<span class="operator">::</span>messageReceived(<span class="type"><a href="qstring.html">QString</a></span> phoneNumber<span class="operator">,</span> <span class="type"><a href="qstring.html">QString</a></span> filename<span class="operator">,</span> <span class="type"><a href="qpixmap.html">QPixmap</a></span> pixmap)
{
<span class="preprocessor">#ifdef MESSAGING_ENABLED</span>
<span class="comment">// MMS message received</span>
<span class="comment">// Check that is came from some of our contact</span>
<span class="type">QContact</span> contact;
<span class="keyword">if</span> (m_businessCardHandling<span class="operator">-</span><span class="operator">></span>findContact(phoneNumber<span class="operator">,</span> contact)) {
<span class="comment">// Ask from user to store it as sender avatar picture into contacts</span>
<span class="keyword">if</span> (<span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>question(
<span class="keyword">this</span><span class="operator">,</span>
<span class="string">"QCameraExample"</span><span class="operator">,</span>
<span class="type"><a href="qstring.html">QString</a></span>(
<span class="string">"MMS picture message received from %1. Do you want to store it as sender avatar picture?"</span>)<span class="operator">.</span>arg(
contact<span class="operator">.</span>displayLabel())<span class="operator">,</span> <span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>Yes <span class="operator">|</span> <span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>No) <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>Yes) {
m_businessCardHandling<span class="operator">-</span><span class="operator">></span>storeAvatarToContact(phoneNumber<span class="operator">,</span> filename<span class="operator">,</span> pixmap);
}
}
<span class="preprocessor">#endif</span>
}</pre>
</div>
<!-- @@@demos/mobile/qcamera/cameraexample.cpp -->
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