| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the documentation of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:BSD$ |
| ** Commercial License Usage |
| ** Licensees holding valid commercial Qt licenses may use this file in |
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| ** 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: |
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| ** distribution. |
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| ** from this software without specific prior written permission. |
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| ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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| ****************************************************************************/ |
| |
| #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: |
| //! [0] |
| QTreeWidget *treeWidget = new QTreeWidget(this); |
| //! [0] |
| */ |
| treeWidget = new QTreeWidget(this); |
| //! [1] |
| treeWidget->setColumnCount(2); |
| //! [1] //! [2] |
| QStringList headers; |
| headers << tr("Subject") << tr("Default"); |
| treeWidget->setHeaderLabels(headers); |
| //! [2] |
| |
| 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() |
| { |
| //! [3] |
| QTreeWidgetItem *cities = new QTreeWidgetItem(treeWidget); |
| cities->setText(0, tr("Cities")); |
| QTreeWidgetItem *osloItem = new QTreeWidgetItem(cities); |
| osloItem->setText(0, tr("Oslo")); |
| osloItem->setText(1, tr("Yes")); |
| //! [3] |
| |
| (new QTreeWidgetItem(cities))->setText(0, tr("Stockholm")); |
| (new QTreeWidgetItem(cities))->setText(0, tr("Helsinki")); |
| (new QTreeWidgetItem(cities))->setText(0, tr("Copenhagen")); |
| |
| //! [4] //! [5] |
| QTreeWidgetItem *planets = new QTreeWidgetItem(treeWidget, cities); |
| //! [4] |
| planets->setText(0, tr("Planets")); |
| //! [5] |
| (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 (including wildcards):")); |
| |
| if (itemText.isEmpty()) |
| return; |
| |
| const QList<QTreeWidgetItem *> items = treeWidget->selectedItems(); |
| for (QTreeWidgetItem *item : items) |
| item->setSelected(false); |
| |
| //! [7] |
| const QList<QTreeWidgetItem *> found = treeWidget->findItems( |
| itemText, Qt::MatchWildcard); |
| |
| for (QTreeWidgetItem *item : found) { |
| item->setSelected(true); |
| // Show the item->text(0) for each item. |
| } |
| //! [7] |
| } |
| |
| 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; |
| |
| //! [8] |
| QTreeWidgetItem *parent = currentItem->parent(); |
| QTreeWidgetItem *newItem; |
| if (parent) |
| newItem = new QTreeWidgetItem(parent, treeWidget->currentItem()); |
| else |
| //! [8] //! [9] |
| newItem = new QTreeWidgetItem(treeWidget, treeWidget->currentItem()); |
| //! [9] |
| |
| newItem->setText(0, itemText); |
| } |
| |
| void MainWindow::removeItem() |
| { |
| QTreeWidgetItem *currentItem = treeWidget->currentItem(); |
| |
| if (!currentItem) |
| return; |
| |
| //! [10] |
| 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); |
| //! [10] //! [11] |
| } |
| //! [11] |
| } |
| |
| 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()); |
| } |