<?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: mainwindow.cpp Example File (widgets/icons/mainwindow.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">mainwindow.cpp Example File<br /><sup><sup>widgets/icons/mainwindow.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 "iconpreviewarea.h" #include "iconsizespinbox.h" #include "imagedelegate.h" #include "mainwindow.h" MainWindow::MainWindow() { centralWidget = new QWidget; setCentralWidget(centralWidget); createPreviewGroupBox(); createImagesGroupBox(); createIconSizeGroupBox(); createActions(); createMenus(); createContextMenu(); QGridLayout *mainLayout = new QGridLayout; mainLayout->addWidget(imagesGroupBox, 0, 0); mainLayout->addWidget(iconSizeGroupBox, 1, 0); mainLayout->addWidget(previewGroupBox, 0, 1, 2, 1); centralWidget->setLayout(mainLayout); setWindowTitle(tr("Icons")); checkCurrentStyle(); otherRadioButton->click(); resize(860, 400); } void MainWindow::about() { QMessageBox::about(this, tr("About Icons"), tr("The <b>Icons</b> example illustrates how Qt renders an icon in " "different modes (active, normal, and disabled) and states (on " "and off) based on a set of images.")); } void MainWindow::changeStyle(bool checked) { if (!checked) return; QAction *action = qobject_cast<QAction *>(sender()); QStyle *style = QStyleFactory::create(action->data().toString()); Q_ASSERT(style); QApplication::setStyle(style); smallRadioButton->setText(tr("Small (%1 x %1)") .arg(style->pixelMetric(QStyle::PM_SmallIconSize))); largeRadioButton->setText(tr("Large (%1 x %1)") .arg(style->pixelMetric(QStyle::PM_LargeIconSize))); toolBarRadioButton->setText(tr("Toolbars (%1 x %1)") .arg(style->pixelMetric(QStyle::PM_ToolBarIconSize))); listViewRadioButton->setText(tr("List views (%1 x %1)") .arg(style->pixelMetric(QStyle::PM_ListViewIconSize))); iconViewRadioButton->setText(tr("Icon views (%1 x %1)") .arg(style->pixelMetric(QStyle::PM_IconViewIconSize))); tabBarRadioButton->setText(tr("Tab bars (%1 x %1)") .arg(style->pixelMetric(QStyle::PM_TabBarIconSize))); changeSize(); } void MainWindow::changeSize(bool checked) { if (!checked) return; int extent; if (otherRadioButton->isChecked()) { extent = otherSpinBox->value(); } else { QStyle::PixelMetric metric; if (smallRadioButton->isChecked()) { metric = QStyle::PM_SmallIconSize; } else if (largeRadioButton->isChecked()) { metric = QStyle::PM_LargeIconSize; } else if (toolBarRadioButton->isChecked()) { metric = QStyle::PM_ToolBarIconSize; } else if (listViewRadioButton->isChecked()) { metric = QStyle::PM_ListViewIconSize; } else if (iconViewRadioButton->isChecked()) { metric = QStyle::PM_IconViewIconSize; } else { metric = QStyle::PM_TabBarIconSize; } extent = QApplication::style()->pixelMetric(metric); } previewArea->setSize(QSize(extent, extent)); otherSpinBox->setEnabled(otherRadioButton->isChecked()); } void MainWindow::changeIcon() { QIcon icon; for (int row = 0; row < imagesTable->rowCount(); ++row) { QTableWidgetItem *item0 = imagesTable->item(row, 0); QTableWidgetItem *item1 = imagesTable->item(row, 1); QTableWidgetItem *item2 = imagesTable->item(row, 2); if (item0->checkState() == Qt::Checked) { QIcon::Mode mode; if (item1->text() == tr("Normal")) { mode = QIcon::Normal; } else if (item1->text() == tr("Active")) { mode = QIcon::Active; } else if (item1->text() == tr("Disabled")) { mode = QIcon::Disabled; } else { mode = QIcon::Selected; } QIcon::State state; if (item2->text() == tr("On")) { state = QIcon::On; } else { state = QIcon::Off; } QString fileName = item0->data(Qt::UserRole).toString(); QImage image(fileName); if (!image.isNull()) icon.addPixmap(QPixmap::fromImage(image), mode, state); } } previewArea->setIcon(icon); } void MainWindow::addImage() { QStringList fileNames = QFileDialog::getOpenFileNames(this, tr("Open Images"), "", tr("Images (*.png *.xpm *.jpg);;" "All Files (*)")); if (!fileNames.isEmpty()) { foreach (QString fileName, fileNames) { int row = imagesTable->rowCount(); imagesTable->setRowCount(row + 1); QString imageName = QFileInfo(fileName).baseName(); QTableWidgetItem *item0 = new QTableWidgetItem(imageName); item0->setData(Qt::UserRole, fileName); item0->setFlags(item0->flags() & ~Qt::ItemIsEditable); QTableWidgetItem *item1 = new QTableWidgetItem(tr("Normal")); QTableWidgetItem *item2 = new QTableWidgetItem(tr("Off")); if (guessModeStateAct->isChecked()) { if (fileName.contains("_act")) { item1->setText(tr("Active")); } else if (fileName.contains("_dis")) { item1->setText(tr("Disabled")); } else if (fileName.contains("_sel")) { item1->setText(tr("Selected")); } if (fileName.contains("_on")) item2->setText(tr("On")); } imagesTable->setItem(row, 0, item0); imagesTable->setItem(row, 1, item1); imagesTable->setItem(row, 2, item2); imagesTable->openPersistentEditor(item1); imagesTable->openPersistentEditor(item2); item0->setCheckState(Qt::Checked); } } } void MainWindow::removeAllImages() { imagesTable->setRowCount(0); changeIcon(); } void MainWindow::createPreviewGroupBox() { previewGroupBox = new QGroupBox(tr("Preview")); previewArea = new IconPreviewArea; QVBoxLayout *layout = new QVBoxLayout; layout->addWidget(previewArea); previewGroupBox->setLayout(layout); } void MainWindow::createImagesGroupBox() { imagesGroupBox = new QGroupBox(tr("Images")); imagesGroupBox->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding); QStringList labels; labels << tr("Image") << tr("Mode") << tr("State"); imagesTable = new QTableWidget; imagesTable->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Ignored); imagesTable->setSelectionMode(QAbstractItemView::NoSelection); imagesTable->setColumnCount(3); imagesTable->setHorizontalHeaderLabels(labels); imagesTable->setItemDelegate(new ImageDelegate(this)); imagesTable->horizontalHeader()->resizeSection(0, 160); imagesTable->horizontalHeader()->resizeSection(1, 80); imagesTable->horizontalHeader()->resizeSection(2, 80); imagesTable->verticalHeader()->hide(); connect(imagesTable, SIGNAL(itemChanged(QTableWidgetItem *)), this, SLOT(changeIcon())); QVBoxLayout *layout = new QVBoxLayout; layout->addWidget(imagesTable); imagesGroupBox->setLayout(layout); } void MainWindow::createIconSizeGroupBox() { iconSizeGroupBox = new QGroupBox(tr("Icon Size")); smallRadioButton = new QRadioButton; largeRadioButton = new QRadioButton; toolBarRadioButton = new QRadioButton; listViewRadioButton = new QRadioButton; iconViewRadioButton = new QRadioButton; tabBarRadioButton = new QRadioButton; otherRadioButton = new QRadioButton(tr("Other:")); otherSpinBox = new IconSizeSpinBox; otherSpinBox->setRange(8, 128); otherSpinBox->setValue(64); connect(smallRadioButton, SIGNAL(toggled(bool)), this, SLOT(changeSize(bool))); connect(largeRadioButton, SIGNAL(toggled(bool)), this, SLOT(changeSize(bool))); connect(toolBarRadioButton, SIGNAL(toggled(bool)), this, SLOT(changeSize(bool))); connect(listViewRadioButton, SIGNAL(toggled(bool)), this, SLOT(changeSize(bool))); connect(iconViewRadioButton, SIGNAL(toggled(bool)), this, SLOT(changeSize(bool))); connect(tabBarRadioButton, SIGNAL(toggled(bool)), this, SLOT(changeSize(bool))); connect(otherRadioButton, SIGNAL(toggled(bool)), this, SLOT(changeSize(bool))); connect(otherSpinBox, SIGNAL(valueChanged(int)), this, SLOT(changeSize())); QHBoxLayout *otherSizeLayout = new QHBoxLayout; otherSizeLayout->addWidget(otherRadioButton); otherSizeLayout->addWidget(otherSpinBox); otherSizeLayout->addStretch(); QGridLayout *layout = new QGridLayout; layout->addWidget(smallRadioButton, 0, 0); layout->addWidget(largeRadioButton, 1, 0); layout->addWidget(toolBarRadioButton, 2, 0); layout->addWidget(listViewRadioButton, 0, 1); layout->addWidget(iconViewRadioButton, 1, 1); layout->addWidget(tabBarRadioButton, 2, 1); layout->addLayout(otherSizeLayout, 3, 0, 1, 2); iconSizeGroupBox->setLayout(layout); } void MainWindow::createActions() { addImageAct = new QAction(tr("&Add Image..."), this); addImageAct->setShortcut(tr("Ctrl+A")); connect(addImageAct, SIGNAL(triggered()), this, SLOT(addImage())); removeAllImagesAct = new QAction(tr("&Remove All Images"), this); removeAllImagesAct->setShortcut(tr("Ctrl+R")); connect(removeAllImagesAct, SIGNAL(triggered()), this, SLOT(removeAllImages())); exitAct = new QAction(tr("&Quit"), this); exitAct->setShortcut(tr("Ctrl+Q")); connect(exitAct, SIGNAL(triggered()), this, SLOT(close())); styleActionGroup = new QActionGroup(this); foreach (QString styleName, QStyleFactory::keys()) { QAction *action = new QAction(styleActionGroup); action->setText(tr("%1 Style").arg(styleName)); action->setData(styleName); action->setCheckable(true); connect(action, SIGNAL(triggered(bool)), this, SLOT(changeStyle(bool))); } guessModeStateAct = new QAction(tr("&Guess Image Mode/State"), this); guessModeStateAct->setCheckable(true); guessModeStateAct->setChecked(true); aboutAct = new QAction(tr("&About"), this); connect(aboutAct, SIGNAL(triggered()), this, SLOT(about())); aboutQtAct = new QAction(tr("About &Qt"), this); connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(aboutQt())); } void MainWindow::createMenus() { fileMenu = menuBar()->addMenu(tr("&File")); fileMenu->addAction(addImageAct); fileMenu->addAction(removeAllImagesAct); fileMenu->addSeparator(); fileMenu->addAction(exitAct); viewMenu = menuBar()->addMenu(tr("&View")); foreach (QAction *action, styleActionGroup->actions()) viewMenu->addAction(action); viewMenu->addSeparator(); viewMenu->addAction(guessModeStateAct); menuBar()->addSeparator(); helpMenu = menuBar()->addMenu(tr("&Help")); helpMenu->addAction(aboutAct); helpMenu->addAction(aboutQtAct); } void MainWindow::createContextMenu() { imagesTable->setContextMenuPolicy(Qt::ActionsContextMenu); imagesTable->addAction(addImageAct); imagesTable->addAction(removeAllImagesAct); } void MainWindow::checkCurrentStyle() { foreach (QAction *action, styleActionGroup->actions()) { QString styleName = action->data().toString(); QStyle *candidate = QStyleFactory::create(styleName); Q_ASSERT(candidate); if (candidate->metaObject()->className() == QApplication::style()->metaObject()->className()) { action->trigger(); return; } delete candidate; } }</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>