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Breadcrumbs go here --> </ul> </div> <div class="toolbuttons toolblock"> <ul> <li id="smallA" class="t_button">A</li> <li id="medA" class="t_button active">A</li> <li id="bigA" class="t_button">A</li> <li id="print" class="t_button"><a href="javascript:this.print();"> <span>Print</span></a></li> </ul> </div> </div> <div class="content mainContent"> <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 --> </div> </div> </div> <div class="ft"> <span></span> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2015 The Qt Company Ltd. 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