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** This file is part of the documentation of the Qt Toolkit.
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#ifndef WINDOW_H
#define WINDOW_H
#include <QMainWindow>
class QAction;
class QTreeWidget;
class QTreeWidgetItem;
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
MainWindow();
public slots:
void findItems();
void insertItem();
void removeItem();
void sortAscending();
void sortDescending();
void updateMenus(QTreeWidgetItem *current);
void updateSortItems();
private:
void setupTreeItems();
QAction *ascendingAction;
QAction *autoSortAction;
QAction *descendingAction;
QAction *insertAction;
QAction *removeAction;
QTreeWidget *treeWidget;
};
#endif
#include <QtGui>
#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, SIGNAL(triggered()), this, SLOT(close()));
connect(ascendingAction, SIGNAL(triggered()), this, SLOT(sortAscending()));
connect(autoSortAction, SIGNAL(triggered()), this, SLOT(updateSortItems()));
connect(descendingAction, SIGNAL(triggered()), this, SLOT(sortDescending()));
connect(findItemsAction, SIGNAL(triggered()), this, SLOT(findItems()));
connect(insertAction, SIGNAL(triggered()), this, SLOT(insertItem()));
connect(removeAction, SIGNAL(triggered()), this, SLOT(removeItem()));
connect(treeWidget,
SIGNAL(currentItemChanged(QTreeWidgetItem *, QTreeWidgetItem *)),
this, SLOT(updateMenus(QTreeWidgetItem *)));
setupTreeItems();
updateMenus(treeWidget->currentItem());
setCentralWidget(treeWidget);
setWindowTitle(tr("Tree Widget"));
}
void MainWindow::setupTreeItems()
{
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"));
(new QTreeWidgetItem(cities))->setText(0, tr("Stockholm"));
(new QTreeWidgetItem(cities))->setText(0, tr("Helsinki"));
(new QTreeWidgetItem(cities))->setText(0, tr("Copenhagen"));
QTreeWidgetItem *planets = new QTreeWidgetItem(treeWidget, cities);
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 (including wildcards):"));
if (itemText.isEmpty())
return;
QTreeWidgetItem *item;
foreach (item, treeWidget->selectedItems())
treeWidget->setItemSelected(item, false);
QList<QTreeWidgetItem *> found = treeWidget->findItems(
itemText, Qt::MatchWildcard);
foreach (item, found) {
treeWidget->setItemSelected(item, true);
// Show the item->text(0) for each item.
}
}
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());
}
#include <QtGui>
#include "mainwindow.h"
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
MainWindow *window = new MainWindow;
window->show();
return app.exec();
}
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