qt5base-lts/examples/widgets/icons/mainwindow.cpp

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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: http://www.qt-project.org/
**
** This file is part of the examples 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 Nokia Corporation and its Subsidiary(-ies) 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."
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtWidgets>
#include "iconpreviewarea.h"
#include "iconsizespinbox.h"
#include "imagedelegate.h"
#include "mainwindow.h"
//! [0]
MainWindow::MainWindow()
{
centralWidget = new QWidget;
setCentralWidget(centralWidget);
createPreviewGroupBox();
createImagesGroupBox();
createIconSizeGroupBox();
createActions();
createMenus();
createContextMenu();
QGridLayout *mainLayout = new QGridLayout;
mainLayout->addWidget(previewGroupBox, 0, 0, 1, 2);
mainLayout->addWidget(imagesGroupBox, 1, 0);
mainLayout->addWidget(iconSizeGroupBox, 1, 1);
centralWidget->setLayout(mainLayout);
setWindowTitle(tr("Icons"));
checkCurrentStyle();
otherRadioButton->click();
resize(minimumSizeHint());
}
//! [0]
//! [1]
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, disabled, and selected) and "
"states (on and off) based on a set of images."));
}
//! [1]
//! [2]
void MainWindow::changeStyle(bool checked)
{
if (!checked)
return;
QAction *action = qobject_cast<QAction *>(sender());
//! [2] //! [3]
QStyle *style = QStyleFactory::create(action->data().toString());
//! [3] //! [4]
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();
}
//! [4]
//! [5]
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());
}
//! [5]
//! [6]
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;
//! [6] //! [7]
}
//! [7]
//! [8]
QString fileName = item0->data(Qt::UserRole).toString();
QImage image(fileName);
if (!image.isNull())
icon.addPixmap(QPixmap::fromImage(image), mode, state);
//! [8] //! [9]
}
//! [9] //! [10]
}
//! [10]
//! [11]
previewArea->setIcon(icon);
}
//! [11]
//! [12]
void MainWindow::addImages()
{
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);
//! [12]
//! [13]
QString imageName = QFileInfo(fileName).baseName();
//! [13] //! [14]
QTableWidgetItem *item0 = new QTableWidgetItem(imageName);
item0->setData(Qt::UserRole, fileName);
item0->setFlags(item0->flags() & ~Qt::ItemIsEditable);
//! [14]
//! [15]
QTableWidgetItem *item1 = new QTableWidgetItem(tr("Normal"));
//! [15] //! [16]
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"));
//! [16] //! [17]
}
//! [17]
//! [18]
imagesTable->setItem(row, 0, item0);
//! [18] //! [19]
imagesTable->setItem(row, 1, item1);
imagesTable->setItem(row, 2, item2);
imagesTable->openPersistentEditor(item1);
imagesTable->openPersistentEditor(item2);
item0->setCheckState(Qt::Checked);
}
}
}
//! [19]
//! [20]
void MainWindow::removeAllImages()
{
imagesTable->setRowCount(0);
changeIcon();
}
//! [20]
void MainWindow::createPreviewGroupBox()
{
previewGroupBox = new QGroupBox(tr("Preview"));
previewArea = new IconPreviewArea;
QVBoxLayout *layout = new QVBoxLayout;
layout->addWidget(previewArea);
previewGroupBox->setLayout(layout);
}
//! [21]
void MainWindow::createImagesGroupBox()
{
imagesGroupBox = new QGroupBox(tr("Images"));
imagesTable = new QTableWidget;
imagesTable->setSelectionMode(QAbstractItemView::NoSelection);
imagesTable->setItemDelegate(new ImageDelegate(this));
//! [21]
//! [22]
QStringList labels;
//! [22] //! [23]
labels << tr("Image") << tr("Mode") << tr("State");
imagesTable->horizontalHeader()->setDefaultSectionSize(90);
imagesTable->setColumnCount(3);
imagesTable->setHorizontalHeaderLabels(labels);
imagesTable->horizontalHeader()->setResizeMode(0, QHeaderView::Stretch);
imagesTable->horizontalHeader()->setResizeMode(1, QHeaderView::Fixed);
imagesTable->horizontalHeader()->setResizeMode(2, QHeaderView::Fixed);
imagesTable->verticalHeader()->hide();
//! [23]
//! [24]
connect(imagesTable, SIGNAL(itemChanged(QTableWidgetItem*)),
//! [24] //! [25]
this, SLOT(changeIcon()));
QVBoxLayout *layout = new QVBoxLayout;
layout->addWidget(imagesTable);
imagesGroupBox->setLayout(layout);
}
//! [25]
//! [26]
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);
//! [26]
//! [27]
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);
layout->setRowStretch(4, 1);
iconSizeGroupBox->setLayout(layout);
}
//! [27]
//! [28]
void MainWindow::createActions()
{
addImagesAct = new QAction(tr("&Add Images..."), this);
addImagesAct->setShortcut(tr("Ctrl+A"));
connect(addImagesAct, SIGNAL(triggered()), this, SLOT(addImages()));
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->setShortcuts(QKeySequence::Quit);
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()));
}
//! [28]
//! [29]
void MainWindow::createMenus()
{
fileMenu = menuBar()->addMenu(tr("&File"));
fileMenu->addAction(addImagesAct);
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);
}
//! [29]
//! [30]
void MainWindow::createContextMenu()
{
imagesTable->setContextMenuPolicy(Qt::ActionsContextMenu);
imagesTable->addAction(addImagesAct);
imagesTable->addAction(removeAllImagesAct);
}
//! [30]
//! [31]
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;
}
}
//! [31]