Mega Code Archive
QListWidget
<![CDATA[
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef WINDOW_H
#define WINDOW_H
#include <QMainWindow>
class QAction;
class QListWidget;
class QListWidgetItem;
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
MainWindow();
public slots:
void insertItem();
void removeItem();
void sortAscending();
void sortDescending();
void updateMenus(QListWidgetItem *current);
private:
void setupListItems();
QAction *insertAction;
QAction *removeAction;
QListWidget *listWidget;
};
#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"));
QAction *ascendingAction = itemsMenu->addAction(tr("Sort in &Ascending Order"));
QAction *descendingAction = itemsMenu->addAction(tr("Sort in &Descending Order"));
menuBar()->addMenu(fileMenu);
menuBar()->addMenu(itemsMenu);
/* For convenient quoting:
QListWidget *listWidget = new QListWidget(this);
*/
listWidget = new QListWidget(this);
listWidget->setSelectionMode(QAbstractItemView::SingleSelection);
connect(quitAction, SIGNAL(triggered()), this, SLOT(close()));
connect(ascendingAction, SIGNAL(triggered()), this, SLOT(sortAscending()));
connect(descendingAction, SIGNAL(triggered()), this, SLOT(sortDescending()));
connect(insertAction, SIGNAL(triggered()), this, SLOT(insertItem()));
connect(removeAction, SIGNAL(triggered()), this, SLOT(removeItem()));
connect(listWidget,
SIGNAL(currentItemChanged(QListWidgetItem *, QListWidgetItem *)),
this, SLOT(updateMenus(QListWidgetItem *)));
setupListItems();
updateMenus(listWidget->currentItem());
setCentralWidget(listWidget);
setWindowTitle(tr("List Widget"));
}
void MainWindow::setupListItems()
{
new QListWidgetItem(tr("Oak"), listWidget);
new QListWidgetItem(tr("Fir"), listWidget);
new QListWidgetItem(tr("Pine"), listWidget);
new QListWidgetItem(tr("Birch"), listWidget);
new QListWidgetItem(tr("Hazel"), listWidget);
new QListWidgetItem(tr("Redwood"), listWidget);
new QListWidgetItem(tr("Sycamore"), listWidget);
new QListWidgetItem(tr("Chestnut"), listWidget);
new QListWidgetItem(tr("Mahogany"), listWidget);
}
void MainWindow::sortAscending()
{
listWidget->sortItems(Qt::AscendingOrder);
}
void MainWindow::sortDescending()
{
listWidget->sortItems(Qt::DescendingOrder);
}
void MainWindow::insertItem()
{
if (!listWidget->currentItem())
return;
QString itemText = QInputDialog::getText(this, tr("Insert Item"),
tr("Input text for the new item:"));
if (itemText.isNull())
return;
QListWidgetItem *newItem = new QListWidgetItem;
newItem->setText(itemText);
int row = listWidget->row(listWidget->currentItem());
listWidget->insertItem(row, newItem);
QString toolTipText = tr("Tooltip:") + itemText;
QString statusTipText = tr("Status tip:") + itemText;
QString whatsThisText = tr("What's This?:") + itemText;
newItem->setToolTip(toolTipText);
newItem->setStatusTip(toolTipText);
newItem->setWhatsThis(whatsThisText);
}
void MainWindow::removeItem()
{
listWidget->takeItem(listWidget->row(listWidget->currentItem()));
}
void MainWindow::updateMenus(QListWidgetItem *current)
{
insertAction->setEnabled(current != 0);
removeAction->setEnabled(current != 0);
}
#include <QtGui>
#include "mainwindow.h"
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
MainWindow *window = new MainWindow;
window->show();
return app.exec();
}
]]>