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

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "mainwindow.h"
#include "colorswatch.h"
#include "toolbar.h"
#include <QActionGroup>
#include <QLayout>
#include <QMenu>
#include <QMenuBar>
#include <QStatusBar>
#include <QTextEdit>
#include <QFile>
#include <QDataStream>
#include <QFileDialog>
#include <QDialogButtonBox>
#include <QMessageBox>
#include <QApplication>
#include <QPainter>
#include <QMouseEvent>
#include <QLineEdit>
#include <QComboBox>
#include <QLabel>
#include <QPushButton>
#include <QTextEdit>
#include <QDebug>
static const char message[] =
"<p><b>Qt Main Window Example</b></p>"
"<p>This is a demonstration of the QMainWindow, QToolBar and "
"QDockWidget classes.</p>"
"<p>The tool bar and dock widgets can be dragged around and rearranged "
"using the mouse or via the menu.</p>"
"<p>Each dock widget contains a colored frame and a context "
"(right-click) menu.</p>"
#ifdef Q_OS_MAC
"<p>On OS X, the \"Black\" dock widget has been created as a "
"<em>Drawer</em>, which is a special kind of QDockWidget.</p>"
#endif
;
Q_DECLARE_METATYPE(QDockWidget::DockWidgetFeatures)
MainWindow::MainWindow(const CustomSizeHintMap &customSizeHints,
QWidget *parent, Qt::WindowFlags flags)
: QMainWindow(parent, flags)
{
Q_UNUSED(message);
setObjectName("MainWindow");
setWindowTitle("Qt Main Window Example");
QTextEdit *center = new QTextEdit(this);
center->setReadOnly(true);
center->setMinimumSize(400, 205);
setCentralWidget(center);
setupToolBar();
setupMenuBar();
setupDockWidgets(customSizeHints);
statusBar()->showMessage(tr("Status Bar"));
}
void MainWindow::actionTriggered(QAction *action)
{
qDebug("action '%s' triggered", action->text().toLocal8Bit().data());
}
void MainWindow::setupToolBar()
{
#ifdef Q_OS_MACOS
setUnifiedTitleAndToolBarOnMac(true);
#endif
for (int i = 0; i < 3; ++i) {
ToolBar *tb = new ToolBar(QString::fromLatin1("Tool Bar %1").arg(i + 1), this);
toolBars.append(tb);
addToolBar(tb);
}
}
void MainWindow::setupMenuBar()
{
QMenu *menu = menuBar()->addMenu(tr("&File"));
menu->addAction(tr("Save layout..."), this, &MainWindow::saveLayout);
menu->addAction(tr("Load layout..."), this, &MainWindow::loadLayout);
menu->addAction(tr("Switch layout direction"),this, &MainWindow::switchLayoutDirection);
menu->addSeparator();
menu->addAction(tr("&Quit"), this, &QWidget::close);
mainWindowMenu = menuBar()->addMenu(tr("Main window"));
QAction *action = mainWindowMenu->addAction(tr("Animated docks"));
action->setCheckable(true);
action->setChecked(dockOptions() & AnimatedDocks);
connect(action, &QAction::toggled, this, &MainWindow::setDockOptions);
action = mainWindowMenu->addAction(tr("Allow nested docks"));
action->setCheckable(true);
action->setChecked(dockOptions() & AllowNestedDocks);
connect(action, &QAction::toggled, this, &MainWindow::setDockOptions);
action = mainWindowMenu->addAction(tr("Allow tabbed docks"));
action->setCheckable(true);
action->setChecked(dockOptions() & AllowTabbedDocks);
connect(action, &QAction::toggled, this, &MainWindow::setDockOptions);
action = mainWindowMenu->addAction(tr("Force tabbed docks"));
action->setCheckable(true);
action->setChecked(dockOptions() & ForceTabbedDocks);
connect(action, &QAction::toggled, this, &MainWindow::setDockOptions);
action = mainWindowMenu->addAction(tr("Vertical tabs"));
action->setCheckable(true);
action->setChecked(dockOptions() & VerticalTabs);
connect(action, &QAction::toggled, this, &MainWindow::setDockOptions);
action = mainWindowMenu->addAction(tr("Grouped dragging"));
action->setCheckable(true);
action->setChecked(dockOptions() & GroupedDragging);
connect(action, &QAction::toggled, this, &MainWindow::setDockOptions);
QMenu *toolBarMenu = menuBar()->addMenu(tr("Tool bars"));
for (int i = 0; i < toolBars.count(); ++i)
toolBarMenu->addMenu(toolBars.at(i)->toolbarMenu());
#ifdef Q_OS_MACOS
toolBarMenu->addSeparator();
action = toolBarMenu->addAction(tr("Unified"));
action->setCheckable(true);
action->setChecked(unifiedTitleAndToolBarOnMac());
connect(action, &QAction::toggled, this, &QMainWindow::setUnifiedTitleAndToolBarOnMac);
#endif
dockWidgetMenu = menuBar()->addMenu(tr("&Dock Widgets"));
QMenu *aboutMenu = menuBar()->addMenu(tr("About"));
QAction *aboutAct = aboutMenu->addAction(tr("&About"), this, &MainWindow::about);
aboutAct->setStatusTip(tr("Show the application's About box"));
QAction *aboutQtAct = aboutMenu->addAction(tr("About &Qt"), qApp, &QApplication::aboutQt);
aboutQtAct->setStatusTip(tr("Show the Qt library's About box"));
}
void MainWindow::setDockOptions()
{
DockOptions opts;
QList<QAction*> actions = mainWindowMenu->actions();
if (actions.at(0)->isChecked())
opts |= AnimatedDocks;
if (actions.at(1)->isChecked())
opts |= AllowNestedDocks;
if (actions.at(2)->isChecked())
opts |= AllowTabbedDocks;
if (actions.at(3)->isChecked())
opts |= ForceTabbedDocks;
if (actions.at(4)->isChecked())
opts |= VerticalTabs;
if (actions.at(5)->isChecked())
opts |= GroupedDragging;
QMainWindow::setDockOptions(opts);
}
void MainWindow::saveLayout()
{
QString fileName
= QFileDialog::getSaveFileName(this, tr("Save layout"));
if (fileName.isEmpty())
return;
QFile file(fileName);
if (!file.open(QFile::WriteOnly)) {
QString msg = tr("Failed to open %1\n%2")
.arg(QDir::toNativeSeparators(fileName), file.errorString());
QMessageBox::warning(this, tr("Error"), msg);
return;
}
QByteArray geo_data = saveGeometry();
QByteArray layout_data = saveState();
bool ok = file.putChar((uchar)geo_data.size());
if (ok)
ok = file.write(geo_data) == geo_data.size();
if (ok)
ok = file.write(layout_data) == layout_data.size();
if (!ok) {
QString msg = tr("Error writing to %1\n%2")
.arg(QDir::toNativeSeparators(fileName), file.errorString());
QMessageBox::warning(this, tr("Error"), msg);
return;
}
}
void MainWindow::loadLayout()
{
QString fileName
= QFileDialog::getOpenFileName(this, tr("Load layout"));
if (fileName.isEmpty())
return;
QFile file(fileName);
if (!file.open(QFile::ReadOnly)) {
QString msg = tr("Failed to open %1\n%2")
.arg(QDir::toNativeSeparators(fileName), file.errorString());
QMessageBox::warning(this, tr("Error"), msg);
return;
}
uchar geo_size;
QByteArray geo_data;
QByteArray layout_data;
bool ok = file.getChar((char*)&geo_size);
if (ok) {
geo_data = file.read(geo_size);
ok = geo_data.size() == geo_size;
}
if (ok) {
layout_data = file.readAll();
ok = layout_data.size() > 0;
}
if (ok)
ok = restoreGeometry(geo_data);
if (ok)
ok = restoreState(layout_data);
if (!ok) {
QString msg = tr("Error reading %1").arg(QDir::toNativeSeparators(fileName));
QMessageBox::warning(this, tr("Error"), msg);
return;
}
}
static QAction *addCornerAction(const QString &text, QMainWindow *mw, QMenu *menu, QActionGroup *group,
Qt::Corner c, Qt::DockWidgetArea a)
{
QAction *result = menu->addAction(text, mw, [=]() { mw->setCorner(c, a); });
result->setCheckable(true);
group->addAction(result);
return result;
}
void MainWindow::setupDockWidgets(const CustomSizeHintMap &customSizeHints)
{
qRegisterMetaType<QDockWidget::DockWidgetFeatures>();
QMenu *cornerMenu = dockWidgetMenu->addMenu(tr("Top left corner"));
QActionGroup *group = new QActionGroup(this);
group->setExclusive(true);
QAction *cornerAction = addCornerAction(tr("Top dock area"), this, cornerMenu, group, Qt::TopLeftCorner, Qt::TopDockWidgetArea);
cornerAction->setChecked(true);
addCornerAction(tr("Left dock area"), this, cornerMenu, group, Qt::TopLeftCorner, Qt::LeftDockWidgetArea);
cornerMenu = dockWidgetMenu->addMenu(tr("Top right corner"));
group = new QActionGroup(this);
group->setExclusive(true);
cornerAction = addCornerAction(tr("Top dock area"), this, cornerMenu, group, Qt::TopRightCorner, Qt::TopDockWidgetArea);
cornerAction->setChecked(true);
addCornerAction(tr("Right dock area"), this, cornerMenu, group, Qt::TopRightCorner, Qt::RightDockWidgetArea);
cornerMenu = dockWidgetMenu->addMenu(tr("Bottom left corner"));
group = new QActionGroup(this);
group->setExclusive(true);
cornerAction = addCornerAction(tr("Bottom dock area"), this, cornerMenu, group, Qt::BottomLeftCorner, Qt::BottomDockWidgetArea);
cornerAction->setChecked(true);
addCornerAction(tr("Left dock area"), this, cornerMenu, group, Qt::BottomLeftCorner, Qt::LeftDockWidgetArea);
cornerMenu = dockWidgetMenu->addMenu(tr("Bottom right corner"));
group = new QActionGroup(this);
group->setExclusive(true);
cornerAction = addCornerAction(tr("Bottom dock area"), this, cornerMenu, group, Qt::BottomRightCorner, Qt::BottomDockWidgetArea);
cornerAction->setChecked(true);
addCornerAction(tr("Right dock area"), this, cornerMenu, group, Qt::BottomRightCorner, Qt::RightDockWidgetArea);
dockWidgetMenu->addSeparator();
static const struct Set {
const char * name;
uint flags;
Qt::DockWidgetArea area;
} sets [] = {
#ifndef Q_OS_MAC
{ "Black", 0, Qt::LeftDockWidgetArea },
#else
{ "Black", Qt::Drawer, Qt::LeftDockWidgetArea },
#endif
{ "White", 0, Qt::RightDockWidgetArea },
{ "Red", 0, Qt::TopDockWidgetArea },
{ "Green", 0, Qt::TopDockWidgetArea },
{ "Blue", 0, Qt::BottomDockWidgetArea },
{ "Yellow", 0, Qt::BottomDockWidgetArea }
};
const int setCount = sizeof(sets) / sizeof(Set);
const QIcon qtIcon(QPixmap(":/res/qt.png"));
for (int i = 0; i < setCount; ++i) {
ColorSwatch *swatch = new ColorSwatch(tr(sets[i].name), this, Qt::WindowFlags(sets[i].flags));
if (i % 2)
swatch->setWindowIcon(qtIcon);
if (qstrcmp(sets[i].name, "Blue") == 0) {
BlueTitleBar *titlebar = new BlueTitleBar(swatch);
swatch->setTitleBarWidget(titlebar);
connect(swatch, &QDockWidget::topLevelChanged, titlebar, &BlueTitleBar::updateMask);
connect(swatch, &QDockWidget::featuresChanged, titlebar, &BlueTitleBar::updateMask, Qt::QueuedConnection);
}
QString name = QString::fromLatin1(sets[i].name);
if (customSizeHints.contains(name))
swatch->setCustomSizeHint(customSizeHints.value(name));
addDockWidget(sets[i].area, swatch);
dockWidgetMenu->addMenu(swatch->colorSwatchMenu());
}
destroyDockWidgetMenu = new QMenu(tr("Destroy dock widget"), this);
destroyDockWidgetMenu->setEnabled(false);
connect(destroyDockWidgetMenu, &QMenu::triggered, this, &MainWindow::destroyDockWidget);
dockWidgetMenu->addSeparator();
dockWidgetMenu->addAction(tr("Add dock widget..."), this, &MainWindow::createDockWidget);
dockWidgetMenu->addMenu(destroyDockWidgetMenu);
}
void MainWindow::switchLayoutDirection()
{
if (layoutDirection() == Qt::LeftToRight)
QApplication::setLayoutDirection(Qt::RightToLeft);
else
QApplication::setLayoutDirection(Qt::LeftToRight);
}
class CreateDockWidgetDialog : public QDialog
{
public:
explicit CreateDockWidgetDialog(QWidget *parent = nullptr);
QString enteredObjectName() const { return m_objectName->text(); }
Qt::DockWidgetArea location() const;
private:
QLineEdit *m_objectName;
QComboBox *m_location;
};
CreateDockWidgetDialog::CreateDockWidgetDialog(QWidget *parent)
: QDialog(parent)
, m_objectName(new QLineEdit(this))
, m_location(new QComboBox(this))
{
setWindowTitle(tr("Add Dock Widget"));
setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
QGridLayout *layout = new QGridLayout(this);
layout->addWidget(new QLabel(tr("Object name:")), 0, 0);
layout->addWidget(m_objectName, 0, 1);
layout->addWidget(new QLabel(tr("Location:")), 1, 0);
m_location->setEditable(false);
m_location->addItem(tr("Top"));
m_location->addItem(tr("Left"));
m_location->addItem(tr("Right"));
m_location->addItem(tr("Bottom"));
m_location->addItem(tr("Restore"));
layout->addWidget(m_location, 1, 1);
QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel, this);
connect(buttonBox, &QDialogButtonBox::rejected, this, &QDialog::reject);
connect(buttonBox, &QDialogButtonBox::accepted, this, &QDialog::accept);
layout->addWidget(buttonBox, 2, 0, 1, 2);
}
Qt::DockWidgetArea CreateDockWidgetDialog::location() const
{
switch (m_location->currentIndex()) {
case 0: return Qt::TopDockWidgetArea;
case 1: return Qt::LeftDockWidgetArea;
case 2: return Qt::RightDockWidgetArea;
case 3: return Qt::BottomDockWidgetArea;
default:
break;
}
return Qt::NoDockWidgetArea;
}
void MainWindow::createDockWidget()
{
CreateDockWidgetDialog dialog(this);
if (dialog.exec() == QDialog::Rejected)
return;
QDockWidget *dw = new QDockWidget;
const QString name = dialog.enteredObjectName();
dw->setObjectName(name);
dw->setWindowTitle(name);
dw->setWidget(new QTextEdit);
Qt::DockWidgetArea area = dialog.location();
switch (area) {
case Qt::LeftDockWidgetArea:
case Qt::RightDockWidgetArea:
case Qt::TopDockWidgetArea:
case Qt::BottomDockWidgetArea:
addDockWidget(area, dw);
break;
default:
if (!restoreDockWidget(dw)) {
QMessageBox::warning(this, QString(), tr("Failed to restore dock widget"));
delete dw;
return;
}
break;
}
extraDockWidgets.append(dw);
destroyDockWidgetMenu->setEnabled(true);
destroyDockWidgetMenu->addAction(new QAction(name, this));
}
void MainWindow::destroyDockWidget(QAction *action)
{
int index = destroyDockWidgetMenu->actions().indexOf(action);
delete extraDockWidgets.takeAt(index);
destroyDockWidgetMenu->removeAction(action);
action->deleteLater();
if (destroyDockWidgetMenu->isEmpty())
destroyDockWidgetMenu->setEnabled(false);
}
void MainWindow::about()
{
QMessageBox::about(this, tr("About MainWindows"), message);
}