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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include <QtWidgets>
#include "mainwindow.h"
MainWindow::MainWindow()
{
QMenu *fileMenu = new QMenu(tr("&File"));
QAction *quitAction = fileMenu->addAction(tr("E&xit"));
quitAction->setShortcut(tr("Ctrl+Q"));
QMenu *itemsMenu = new QMenu(tr("&Items"));
insertAction = itemsMenu->addAction(tr("&Insert Item"));
removeAction = itemsMenu->addAction(tr("&Remove Item"));
removeAction->setEnabled(false);
itemsMenu->addSeparator();
ascendingAction = itemsMenu->addAction(tr("Sort in &Ascending Order"));
descendingAction = itemsMenu->addAction(tr("Sort in &Descending Order"));
autoSortAction = itemsMenu->addAction(tr("&Automatically Sort Items"));
autoSortAction->setCheckable(true);
itemsMenu->addSeparator();
QAction *findItemsAction = itemsMenu->addAction(tr("&Find Items"));
findItemsAction->setShortcut(tr("Ctrl+F"));
menuBar()->addMenu(fileMenu);
menuBar()->addMenu(itemsMenu);
/* For convenient quoting:
QTreeWidget *treeWidget = new QTreeWidget(this);
*/
treeWidget = new QTreeWidget(this);
treeWidget->setColumnCount(2);
QStringList headers;
headers << tr("Subject") << tr("Default");
treeWidget->setHeaderLabels(headers);
connect(quitAction, &QAction::triggered, this, &QWidget::close);
connect(ascendingAction, &QAction::triggered, this, &MainWindow::sortAscending);
connect(autoSortAction, &QAction::triggered, this, &MainWindow::updateSortItems);
connect(descendingAction, &QAction::triggered, this, &MainWindow::sortDescending);
connect(findItemsAction, &QAction::triggered, this, &MainWindow::findItems);
connect(insertAction, &QAction::triggered, this, &MainWindow::insertItem);
connect(removeAction, &QAction::triggered, this, &MainWindow::removeItem);
connect(treeWidget, &QTreeWidget::currentItemChanged,
this, &MainWindow::updateMenus);
setupTreeItems();
updateMenus(treeWidget->currentItem());
setCentralWidget(treeWidget);
setWindowTitle(tr("Tree Widget"));
}
void MainWindow::setupTreeItems()
{
QTreeWidgetItem *planets = new QTreeWidgetItem(treeWidget);
planets->setText(0, tr("Planets"));
(new QTreeWidgetItem(planets))->setText(0, tr("Mercury"));
(new QTreeWidgetItem(planets))->setText(0, tr("Venus"));
QTreeWidgetItem *earthItem = new QTreeWidgetItem(planets);
earthItem->setText(0, tr("Earth"));
earthItem->setText(1, tr("Yes"));
(new QTreeWidgetItem(planets))->setText(0, tr("Mars"));
(new QTreeWidgetItem(planets))->setText(0, tr("Jupiter"));
(new QTreeWidgetItem(planets))->setText(0, tr("Saturn"));
(new QTreeWidgetItem(planets))->setText(0, tr("Uranus"));
(new QTreeWidgetItem(planets))->setText(0, tr("Neptune"));
(new QTreeWidgetItem(planets))->setText(0, tr("Pluto"));
}
void MainWindow::findItems()
{
QString itemText = QInputDialog::getText(this, tr("Find Items"),
tr("Text to find:"));
if (itemText.isEmpty())
return;
//! [0]
QTreeWidgetItemIterator it(treeWidget);
while (*it) {
if ((*it)->text(0) == itemText)
(*it)->setSelected(true);
++it;
}
//! [0]
}
void MainWindow::insertItem()
{
QTreeWidgetItem *currentItem = treeWidget->currentItem();
if (!currentItem)
return;
QString itemText = QInputDialog::getText(this, tr("Insert Item"),
tr("Input text for the new item:"));
if (itemText.isEmpty())
return;
QTreeWidgetItem *parent = currentItem->parent();
QTreeWidgetItem *newItem;
if (parent)
newItem = new QTreeWidgetItem(parent, treeWidget->currentItem());
else
newItem = new QTreeWidgetItem(treeWidget, treeWidget->currentItem());
newItem->setText(0, itemText);
}
void MainWindow::removeItem()
{
QTreeWidgetItem *currentItem = treeWidget->currentItem();
if (!currentItem)
return;
QTreeWidgetItem *parent = currentItem->parent();
int index;
if (parent) {
index = parent->indexOfChild(treeWidget->currentItem());
delete parent->takeChild(index);
} else {
index = treeWidget->indexOfTopLevelItem(treeWidget->currentItem());
delete treeWidget->takeTopLevelItem(index);
}
}
void MainWindow::sortAscending()
{
treeWidget->sortItems(0, Qt::AscendingOrder);
}
void MainWindow::sortDescending()
{
treeWidget->sortItems(0, Qt::DescendingOrder);
}
void MainWindow::updateMenus(QTreeWidgetItem *current)
{
insertAction->setEnabled(current != 0);
removeAction->setEnabled(current != 0);
}
void MainWindow::updateSortItems()
{
ascendingAction->setEnabled(!autoSortAction->isChecked());
descendingAction->setEnabled(!autoSortAction->isChecked());
treeWidget->setSortingEnabled(autoSortAction->isChecked());
}
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