mainwindow.cpp Example File
widgets/icons/mainwindow.cpp
/****************************************************************************
**
** Copyright (C) 2005-2005 Trolltech AS. All rights reserved.
**
** This file is part of the documentation 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://www.trolltech.com/products/qt/opensource.html
**
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** review the following information:
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** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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****************************************************************************/
#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)));
changeSize();
}
void MainWindow::changeSize()
{
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 {
metric = QStyle::PM_IconViewIconSize;
}
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 {
mode = QIcon::Disabled;
}
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"));
}
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;
otherRadioButton = new QRadioButton(tr("Other:"));
otherSpinBox = new IconSizeSpinBox;
otherSpinBox->setRange(8, 128);
otherSpinBox->setValue(64);
connect(toolBarRadioButton, SIGNAL(toggled(bool)),
this, SLOT(changeSize()));
connect(listViewRadioButton, SIGNAL(toggled(bool)),
this, SLOT(changeSize()));
connect(iconViewRadioButton, SIGNAL(toggled(bool)),
this, SLOT(changeSize()));
connect(smallRadioButton, SIGNAL(toggled(bool)), this, SLOT(changeSize()));
connect(largeRadioButton, SIGNAL(toggled(bool)), this, SLOT(changeSize()));
connect(otherRadioButton, SIGNAL(toggled(bool)), this, SLOT(changeSize()));
connect(otherSpinBox, SIGNAL(valueChanged(int)), this, SLOT(changeSize()));
QHBoxLayout *otherSizeLayout = new QHBoxLayout;
otherSizeLayout->addWidget(otherRadioButton);
otherSizeLayout->addWidget(otherSpinBox);
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->addLayout(otherSizeLayout, 2, 1);
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;
}
}
