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-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the examples of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, 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."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include "mainwindow.h"
-#include "iconpreviewarea.h"
-#include "iconsizespinbox.h"
-#include "imagedelegate.h"
-
-#include <QActionGroup>
-#include <QApplication>
-#include <QButtonGroup>
-#include <QCheckBox>
-#include <QFileDialog>
-#include <QHeaderView>
-#include <QFormLayout>
-#include <QGridLayout>
-#include <QGroupBox>
-#include <QImageReader>
-#include <QLabel>
-#include <QMenuBar>
-#include <QMessageBox>
-#include <QRadioButton>
-#include <QScreen>
-#include <QStandardPaths>
-#include <QStyleFactory>
-#include <QTableWidget>
-#include <QWindow>
-
-//! [40]
-enum { OtherSize = QStyle::PM_CustomBase };
-//! [40]
-
-//! [0]
-MainWindow::MainWindow(QWidget *parent)
- : QMainWindow(parent)
-{
- QWidget *centralWidget = new QWidget(this);
- setCentralWidget(centralWidget);
-
- createActions();
-
- QGridLayout *mainLayout = new QGridLayout(centralWidget);
-
- QGroupBox *previewGroupBox = new QGroupBox(tr("Preview"));
- previewArea = new IconPreviewArea(previewGroupBox);
- QVBoxLayout *previewLayout = new QVBoxLayout(previewGroupBox);
- previewLayout->addWidget(previewArea);
-
- mainLayout->addWidget(previewGroupBox, 0, 0, 1, 2);
- mainLayout->addWidget(createImagesGroupBox(), 1, 0);
- QVBoxLayout *vBox = new QVBoxLayout;
- vBox->addWidget(createIconSizeGroupBox());
- vBox->addWidget(createHighDpiIconSizeGroupBox());
- vBox->addItem(new QSpacerItem(0, 0, QSizePolicy::Ignored, QSizePolicy::MinimumExpanding));
- mainLayout->addLayout(vBox, 1, 1);
- createContextMenu();
-
- setWindowTitle(tr("Icons"));
- checkCurrentStyle();
- sizeButtonGroup->button(OtherSize)->click();
-}
-//! [0]
-
-//! [44]
-void MainWindow::show()
-{
- QMainWindow::show();
- connect(windowHandle(), &QWindow::screenChanged, this, &MainWindow::screenChanged);
- screenChanged();
-}
-//! [44]
-
-//! [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;
-
- const QAction *action = qobject_cast<QAction *>(sender());
-//! [2] //! [3]
- QStyle *style = QStyleFactory::create(action->data().toString());
-//! [3] //! [4]
- Q_ASSERT(style);
- QApplication::setStyle(style);
-
- const QList<QAbstractButton*> buttons = sizeButtonGroup->buttons();
- for (QAbstractButton *button : buttons) {
- const QStyle::PixelMetric metric = static_cast<QStyle::PixelMetric>(sizeButtonGroup->id(button));
- const int value = style->pixelMetric(metric);
- switch (metric) {
- case QStyle::PM_SmallIconSize:
- button->setText(tr("Small (%1 x %1)").arg(value));
- break;
- case QStyle::PM_LargeIconSize:
- button->setText(tr("Large (%1 x %1)").arg(value));
- break;
- case QStyle::PM_ToolBarIconSize:
- button->setText(tr("Toolbars (%1 x %1)").arg(value));
- break;
- case QStyle::PM_ListViewIconSize:
- button->setText(tr("List views (%1 x %1)").arg(value));
- break;
- case QStyle::PM_IconViewIconSize:
- button->setText(tr("Icon views (%1 x %1)").arg(value));
- break;
- case QStyle::PM_TabBarIconSize:
- button->setText(tr("Tab bars (%1 x %1)").arg(value));
- break;
- default:
- break;
- }
- }
-
- triggerChangeSize();
-}
-//! [4]
-
-//! [5]
-void MainWindow::changeSize(QAbstractButton *button, bool checked)
-{
- if (!checked)
- return;
-
- const int index = sizeButtonGroup->id(button);
- const bool other = index == int(OtherSize);
- const int extent = other
- ? otherSpinBox->value()
- : QApplication::style()->pixelMetric(static_cast<QStyle::PixelMetric>(index));
-
- previewArea->setSize(QSize(extent, extent));
- otherSpinBox->setEnabled(other);
-}
-
-void MainWindow::triggerChangeSize()
-{
- changeSize(sizeButtonGroup->checkedButton(), true);
-}
-//! [5]
-
-//! [6]
-void MainWindow::changeIcon()
-{
- QIcon icon;
-
- for (int row = 0; row < imagesTable->rowCount(); ++row) {
- const QTableWidgetItem *fileItem = imagesTable->item(row, 0);
- const QTableWidgetItem *modeItem = imagesTable->item(row, 1);
- const QTableWidgetItem *stateItem = imagesTable->item(row, 2);
-
- if (fileItem->checkState() == Qt::Checked) {
- const int modeIndex = IconPreviewArea::iconModeNames().indexOf(modeItem->text());
- Q_ASSERT(modeIndex >= 0);
- const int stateIndex = IconPreviewArea::iconStateNames().indexOf(stateItem->text());
- Q_ASSERT(stateIndex >= 0);
- const QIcon::Mode mode = IconPreviewArea::iconModes().at(modeIndex);
- const QIcon::State state = IconPreviewArea::iconStates().at(stateIndex);
-//! [6]
-
-//! [8]
- const QString fileName = fileItem->data(Qt::UserRole).toString();
- QImage image(fileName);
- if (!image.isNull())
- icon.addPixmap(QPixmap::fromImage(image), mode, state);
-//! [8]
- }
- }
-//! [11]
- previewArea->setIcon(icon);
-//! [11]
-}
-
-void MainWindow::addSampleImages()
-{
- addImages(QLatin1String(SRCDIR) + QLatin1String("/images"));
-}
-
-void MainWindow::addOtherImages()
-{
- static bool firstInvocation = true;
- QString directory;
- if (firstInvocation) {
- firstInvocation = false;
- directory = QStandardPaths::standardLocations(QStandardPaths::PicturesLocation).value(0, QString());
- }
- addImages(directory);
-}
-
-//! [12]
-void MainWindow::addImages(const QString &directory)
-{
- QFileDialog fileDialog(this, tr("Open Images"), directory);
- QStringList mimeTypeFilters;
- const QList<QByteArray> mimeTypes = QImageReader::supportedMimeTypes();
- for (const QByteArray &mimeTypeName : mimeTypes)
- mimeTypeFilters.append(mimeTypeName);
- mimeTypeFilters.sort();
- fileDialog.setMimeTypeFilters(mimeTypeFilters);
- fileDialog.selectMimeTypeFilter(QLatin1String("image/png"));
- fileDialog.setAcceptMode(QFileDialog::AcceptOpen);
- fileDialog.setFileMode(QFileDialog::ExistingFiles);
- if (!nativeFileDialogAct->isChecked())
- fileDialog.setOption(QFileDialog::DontUseNativeDialog);
- if (fileDialog.exec() == QDialog::Accepted)
- loadImages(fileDialog.selectedFiles());
-//! [12]
-}
-
-void MainWindow::loadImages(const QStringList &fileNames)
-{
- for (const QString &fileName : fileNames) {
- const int row = imagesTable->rowCount();
- imagesTable->setRowCount(row + 1);
-//! [13]
- const QFileInfo fileInfo(fileName);
- const QString imageName = fileInfo.baseName();
- const QString fileName2x = fileInfo.absolutePath()
- + QLatin1Char('/') + imageName + QLatin1String("@2x.") + fileInfo.suffix();
- const QFileInfo fileInfo2x(fileName2x);
- const QImage image(fileName);
- const QString toolTip =
- tr("Directory: %1\nFile: %2\nFile@2x: %3\nSize: %4x%5")
- .arg(QDir::toNativeSeparators(fileInfo.absolutePath()), fileInfo.fileName())
- .arg(fileInfo2x.exists() ? fileInfo2x.fileName() : tr("<None>"))
- .arg(image.width()).arg(image.height());
- QTableWidgetItem *fileItem = new QTableWidgetItem(imageName);
- fileItem->setData(Qt::UserRole, fileName);
- fileItem->setIcon(QPixmap::fromImage(image));
- fileItem->setFlags((fileItem->flags() | Qt::ItemIsUserCheckable) & ~Qt::ItemIsEditable);
- fileItem->setToolTip(toolTip);
-//! [13]
-
-//! [15]
- QIcon::Mode mode = QIcon::Normal;
- QIcon::State state = QIcon::Off;
- if (guessModeStateAct->isChecked()) {
- if (imageName.contains(QLatin1String("_act"), Qt::CaseInsensitive))
- mode = QIcon::Active;
- else if (imageName.contains(QLatin1String("_dis"), Qt::CaseInsensitive))
- mode = QIcon::Disabled;
- else if (imageName.contains(QLatin1String("_sel"), Qt::CaseInsensitive))
- mode = QIcon::Selected;
-
- if (imageName.contains(QLatin1String("_on"), Qt::CaseInsensitive))
- state = QIcon::On;
-//! [15]
- }
-
-//! [18]
- imagesTable->setItem(row, 0, fileItem);
- QTableWidgetItem *modeItem =
- new QTableWidgetItem(IconPreviewArea::iconModeNames().at(IconPreviewArea::iconModes().indexOf(mode)));
- modeItem->setToolTip(toolTip);
- imagesTable->setItem(row, 1, modeItem);
- QTableWidgetItem *stateItem =
- new QTableWidgetItem(IconPreviewArea::iconStateNames().at(IconPreviewArea::iconStates().indexOf(state)));
- stateItem->setToolTip(toolTip);
- imagesTable->setItem(row, 2, stateItem);
- imagesTable->openPersistentEditor(modeItem);
- imagesTable->openPersistentEditor(stateItem);
-
- fileItem->setCheckState(Qt::Checked);
-//! [18]
- }
-}
-
-//! [20]
-void MainWindow::removeAllImages()
-{
- imagesTable->setRowCount(0);
- changeIcon();
-}
-//! [20]
-
-//! [21]
-QWidget *MainWindow::createImagesGroupBox()
-{
- QGroupBox *imagesGroupBox = new QGroupBox(tr("Images"));
-
- imagesTable = new QTableWidget;
- imagesTable->setSelectionMode(QAbstractItemView::NoSelection);
- imagesTable->setItemDelegate(new ImageDelegate(this));
-//! [21]
-
-//! [22]
- const QStringList labels({tr("Image"), tr("Mode"), tr("State")});
-
- imagesTable->horizontalHeader()->setDefaultSectionSize(90);
- imagesTable->setColumnCount(3);
- imagesTable->setHorizontalHeaderLabels(labels);
- imagesTable->horizontalHeader()->setSectionResizeMode(0, QHeaderView::Stretch);
- imagesTable->horizontalHeader()->setSectionResizeMode(1, QHeaderView::Fixed);
- imagesTable->horizontalHeader()->setSectionResizeMode(2, QHeaderView::Fixed);
- imagesTable->verticalHeader()->hide();
-//! [22]
-
-//! [24]
- connect(imagesTable, &QTableWidget::itemChanged,
- this, &MainWindow::changeIcon);
-
- QVBoxLayout *layout = new QVBoxLayout(imagesGroupBox);
- layout->addWidget(imagesTable);
- return imagesGroupBox;
-//! [24]
-}
-
-//! [26]
-QWidget *MainWindow::createIconSizeGroupBox()
-{
- QGroupBox *iconSizeGroupBox = new QGroupBox(tr("Icon Size"));
-
- sizeButtonGroup = new QButtonGroup(this);
- sizeButtonGroup->setExclusive(true);
-
- connect(sizeButtonGroup, &QButtonGroup::buttonToggled,
- this, &MainWindow::changeSize);
-
- QRadioButton *smallRadioButton = new QRadioButton;
- sizeButtonGroup->addButton(smallRadioButton, QStyle::PM_SmallIconSize);
- QRadioButton *largeRadioButton = new QRadioButton;
- sizeButtonGroup->addButton(largeRadioButton, QStyle::PM_LargeIconSize);
- QRadioButton *toolBarRadioButton = new QRadioButton;
- sizeButtonGroup->addButton(toolBarRadioButton, QStyle::PM_ToolBarIconSize);
- QRadioButton *listViewRadioButton = new QRadioButton;
- sizeButtonGroup->addButton(listViewRadioButton, QStyle::PM_ListViewIconSize);
- QRadioButton *iconViewRadioButton = new QRadioButton;
- sizeButtonGroup->addButton(iconViewRadioButton, QStyle::PM_IconViewIconSize);
- QRadioButton *tabBarRadioButton = new QRadioButton;
- sizeButtonGroup->addButton(tabBarRadioButton, QStyle::PM_TabBarIconSize);
- QRadioButton *otherRadioButton = new QRadioButton(tr("Other:"));
- sizeButtonGroup->addButton(otherRadioButton, OtherSize);
- otherSpinBox = new IconSizeSpinBox;
- otherSpinBox->setRange(8, 256);
- const QString spinBoxToolTip =
- tr("Enter a custom size within %1..%2")
- .arg(otherSpinBox->minimum()).arg(otherSpinBox->maximum());
- otherSpinBox->setValue(64);
- otherSpinBox->setToolTip(spinBoxToolTip);
- otherRadioButton->setToolTip(spinBoxToolTip);
-//! [26]
-
-//! [27]
- connect(otherSpinBox, &QSpinBox::valueChanged,
- this, &MainWindow::triggerChangeSize);
-
- QHBoxLayout *otherSizeLayout = new QHBoxLayout;
- otherSizeLayout->addWidget(otherRadioButton);
- otherSizeLayout->addWidget(otherSpinBox);
- otherSizeLayout->addStretch();
-
- QGridLayout *layout = new QGridLayout(iconSizeGroupBox);
- 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);
- return iconSizeGroupBox;
-//! [27]
-}
-
-void MainWindow::screenChanged()
-{
- devicePixelRatioLabel->setText(QString::number(devicePixelRatioF()));
- if (const QWindow *window = windowHandle()) {
- const QScreen *screen = window->screen();
- const QString screenDescription =
- tr("\"%1\" (%2x%3)").arg(screen->name())
- .arg(screen->geometry().width()).arg(screen->geometry().height());
- screenNameLabel->setText(screenDescription);
- }
- changeIcon();
-}
-
-QWidget *MainWindow::createHighDpiIconSizeGroupBox()
-{
- QGroupBox *highDpiGroupBox = new QGroupBox(tr("High DPI Scaling"));
- QFormLayout *layout = new QFormLayout(highDpiGroupBox);
- devicePixelRatioLabel = new QLabel(highDpiGroupBox);
- screenNameLabel = new QLabel(highDpiGroupBox);
- layout->addRow(tr("Screen:"), screenNameLabel);
- layout->addRow(tr("Device pixel ratio:"), devicePixelRatioLabel);
- return highDpiGroupBox;
-}
-
-//! [28]
-void MainWindow::createActions()
-{
- QMenu *fileMenu = menuBar()->addMenu(tr("&File"));
-
- addSampleImagesAct = new QAction(tr("Add &Sample Images..."), this);
- addSampleImagesAct->setShortcut(tr("Ctrl+A"));
- connect(addSampleImagesAct, &QAction::triggered, this, &MainWindow::addSampleImages);
- fileMenu->addAction(addSampleImagesAct);
-
- addOtherImagesAct = new QAction(tr("&Add Images..."), this);
- addOtherImagesAct->setShortcut(QKeySequence::Open);
- connect(addOtherImagesAct, &QAction::triggered, this, &MainWindow::addOtherImages);
- fileMenu->addAction(addOtherImagesAct);
-
- removeAllImagesAct = new QAction(tr("&Remove All Images"), this);
- removeAllImagesAct->setShortcut(tr("Ctrl+R"));
- connect(removeAllImagesAct, &QAction::triggered,
- this, &MainWindow::removeAllImages);
- fileMenu->addAction(removeAllImagesAct);
-
- fileMenu->addSeparator();
-
- QAction *exitAct = fileMenu->addAction(tr("&Quit"), this, &QWidget::close);
- exitAct->setShortcuts(QKeySequence::Quit);
-
- QMenu *viewMenu = menuBar()->addMenu(tr("&View"));
-
- styleActionGroup = new QActionGroup(this);
- const QStringList styleKeys = QStyleFactory::keys();
- for (const QString &styleName : styleKeys) {
- QAction *action = new QAction(tr("%1 Style").arg(styleName), styleActionGroup);
- action->setData(styleName);
- action->setCheckable(true);
- connect(action, &QAction::triggered, this, &MainWindow::changeStyle);
- viewMenu->addAction(action);
- }
-
- QMenu *settingsMenu = menuBar()->addMenu(tr("&Settings"));
-
- guessModeStateAct = new QAction(tr("&Guess Image Mode/State"), this);
- guessModeStateAct->setCheckable(true);
- guessModeStateAct->setChecked(true);
- settingsMenu->addAction(guessModeStateAct);
-
- nativeFileDialogAct = new QAction(tr("&Use Native File Dialog"), this);
- nativeFileDialogAct->setCheckable(true);
- nativeFileDialogAct->setChecked(true);
- settingsMenu->addAction(nativeFileDialogAct);
-
- QMenu *helpMenu = menuBar()->addMenu(tr("&Help"));
- helpMenu->addAction(tr("&About"), this, &MainWindow::about);
- helpMenu->addAction(tr("About &Qt"), qApp, &QApplication::aboutQt);
-}
-//! [28]
-
-//! [30]
-void MainWindow::createContextMenu()
-{
- imagesTable->setContextMenuPolicy(Qt::ActionsContextMenu);
- imagesTable->addAction(addSampleImagesAct);
- imagesTable->addAction(addOtherImagesAct);
- imagesTable->addAction(removeAllImagesAct);
-}
-//! [30]
-
-//! [31]
-void MainWindow::checkCurrentStyle()
-{
- const QList<QAction *> actions = styleActionGroup->actions();
- for (QAction *action : actions) {
- const QString styleName = action->data().toString();
- const std::unique_ptr<QStyle> candidate{QStyleFactory::create(styleName)};
- Q_ASSERT(candidate);
- if (candidate->metaObject()->className()
- == QApplication::style()->metaObject()->className()) {
- action->trigger();
- return;
- }
- }
-}
-//! [31]