<?xml version="1.0" encoding="iso-8859-1"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <title>Qt 4.2: screenshot.cpp Example File (desktop/screenshot/screenshot.cpp)</title> <link href="classic.css" rel="stylesheet" type="text/css" /> </head> <body> <table border="0" cellpadding="0" cellspacing="0" width="100%"> <tr> <td align="left" valign="top" width="32"><a href="http://www.trolltech.com/products/qt"><img src="images/qt-logo.png" align="left" width="32" height="32" border="0" /></a></td> <td width="1"> </td><td class="postheader" valign="center"><a href="index.html"><font color="#004faf">Home</font></a> · <a href="classes.html"><font color="#004faf">All Classes</font></a> · <a href="mainclasses.html"><font color="#004faf">Main Classes</font></a> · <a href="groups.html"><font color="#004faf">Grouped Classes</font></a> · <a href="modules.html"><font color="#004faf">Modules</font></a> · <a href="functions.html"><font color="#004faf">Functions</font></a></td> <td align="right" valign="top" width="230"><a href="http://www.trolltech.com"><img src="images/trolltech-logo.png" align="right" width="203" height="32" border="0" /></a></td></tr></table><h1 align="center">screenshot.cpp Example File<br /><sup><sup>desktop/screenshot/screenshot.cpp</sup></sup></h1> <pre> /**************************************************************************** ** ** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved. ** ** This file is part of the example classes of the Qt Toolkit. ** ** This file may be used under the terms of the GNU General Public ** License version 2.0 as published by the Free Software Foundation ** and appearing in the file LICENSE.GPL included in the packaging of ** this file. Please review the following information to ensure GNU ** General Public Licensing requirements will be met: ** http:<span class="comment">//www.trolltech.com/products/qt/opensource.html</span> ** ** If you are unsure which license is appropriate for your use, please ** review the following information: ** http:<span class="comment">//www.trolltech.com/products/qt/licensing.html or contact the</span> ** sales department at sales@trolltech.com. ** ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. ** ****************************************************************************/ #include <QtGui> #include "screenshot.h" Screenshot::Screenshot() { screenshotLabel = new QLabel; screenshotLabel->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding); screenshotLabel->setAlignment(Qt::AlignCenter); screenshotLabel->setMinimumSize(240, 160); createOptionsGroupBox(); createButtonsLayout(); mainLayout = new QVBoxLayout; mainLayout->addWidget(screenshotLabel); mainLayout->addWidget(optionsGroupBox); mainLayout->addLayout(buttonsLayout); setLayout(mainLayout); shootScreen(); delaySpinBox->setValue(5); setWindowTitle(tr("Screenshot")); resize(300, 200); } void Screenshot::resizeEvent(QResizeEvent * /* event */) { QSize scaledSize = originalPixmap.size(); scaledSize.scale(screenshotLabel->size(), Qt::KeepAspectRatio); if (!screenshotLabel->pixmap() || scaledSize != screenshotLabel->pixmap()->size()) updateScreenshotLabel(); } void Screenshot::newScreenshot() { if (hideThisWindowCheckBox->isChecked()) hide(); newScreenshotButton->setDisabled(true); QTimer::singleShot(delaySpinBox->value() * 1000, this, SLOT(shootScreen())); } void Screenshot::saveScreenshot() { QString format = "png"; QString initialPath = QDir::currentPath() + tr("/untitled.") + format; QString fileName = QFileDialog::getSaveFileName(this, tr("Save As"), initialPath, tr("%1 Files (*.%2);;All Files (*)") .arg(format.toUpper()) .arg(format)); if (!fileName.isEmpty()) originalPixmap.save(fileName, format.toAscii()); } void Screenshot::shootScreen() { if (delaySpinBox->value() != 0) qApp->beep(); originalPixmap = QPixmap::grabWindow(QApplication::desktop()->winId()); updateScreenshotLabel(); newScreenshotButton->setDisabled(false); if (hideThisWindowCheckBox->isChecked()) show(); } void Screenshot::updateCheckBox() { if (delaySpinBox->value() == 0) hideThisWindowCheckBox->setDisabled(true); else hideThisWindowCheckBox->setDisabled(false); } void Screenshot::createOptionsGroupBox() { optionsGroupBox = new QGroupBox(tr("Options")); delaySpinBox = new QSpinBox; delaySpinBox->setSuffix(tr(" s")); delaySpinBox->setMaximum(60); connect(delaySpinBox, SIGNAL(valueChanged(int)), this, SLOT(updateCheckBox())); delaySpinBoxLabel = new QLabel(tr("Screenshot Delay:")); hideThisWindowCheckBox = new QCheckBox(tr("Hide This Window")); optionsGroupBoxLayout = new QGridLayout; optionsGroupBoxLayout->addWidget(delaySpinBoxLabel, 0, 0); optionsGroupBoxLayout->addWidget(delaySpinBox, 0, 1); optionsGroupBoxLayout->addWidget(hideThisWindowCheckBox, 1, 0, 1, 2); optionsGroupBox->setLayout(optionsGroupBoxLayout); } void Screenshot::createButtonsLayout() { newScreenshotButton = createButton(tr("New Screenshot"), this, SLOT(newScreenshot())); saveScreenshotButton = createButton(tr("Save Screenshot"), this, SLOT(saveScreenshot())); quitScreenshotButton = createButton(tr("Quit"), this, SLOT(close())); buttonsLayout = new QHBoxLayout; buttonsLayout->addStretch(); buttonsLayout->addWidget(newScreenshotButton); buttonsLayout->addWidget(saveScreenshotButton); buttonsLayout->addWidget(quitScreenshotButton); } QPushButton *Screenshot::createButton(const QString &text, QWidget *receiver, const char *member) { QPushButton *button = new QPushButton(text); button->connect(button, SIGNAL(clicked()), receiver, member); return button; } void Screenshot::updateScreenshotLabel() { screenshotLabel->setPixmap(originalPixmap.scaled(screenshotLabel->size(), Qt::KeepAspectRatio, Qt::SmoothTransformation)); }</pre> <p /><address><hr /><div align="center"> <table width="100%" cellspacing="0" border="0"><tr class="address"> <td width="30%">Copyright © 2006 <a href="trolltech.html">Trolltech</a></td> <td width="40%" align="center"><a href="trademarks.html">Trademarks</a></td> <td width="30%" align="right"><div align="right">Qt 4.2.1</div></td> </tr></table></div></address></body> </html>