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** this package.

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#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:

//! [0]

    QListWidget *listWidget = new QListWidget(this);

//! [0]

*/

    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()

{

//! [1]

    new QListWidgetItem(tr("Oak"), listWidget);

    new QListWidgetItem(tr("Fir"), listWidget);

    new QListWidgetItem(tr("Pine"), listWidget);

//! [1]

    new QListWidgetItem(tr("Birch"), listWidget);

//! [2]

    new QListWidgetItem(tr("Hazel"), listWidget);

//! [2]

    new QListWidgetItem(tr("Redwood"), listWidget);

//! [3]

    new QListWidgetItem(tr("Sycamore"), listWidget);

    new QListWidgetItem(tr("Chestnut"), listWidget);

    new QListWidgetItem(tr("Mahogany"), listWidget);

//! [3]

}

void MainWindow::sortAscending()

{

//! [4]

    listWidget->sortItems(Qt::AscendingOrder);

//! [4]

}

void MainWindow::sortDescending()

{

//! [5]

    listWidget->sortItems(Qt::DescendingOrder);

//! [5]

}

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;

//! [6]

    QListWidgetItem *newItem = new QListWidgetItem;

    newItem->setText(itemText);

//! [6]

    int row = listWidget->row(listWidget->currentItem());

//! [7]

    listWidget->insertItem(row, newItem);

//! [7]

    QString toolTipText = tr("Tooltip:") + itemText;

    QString statusTipText = tr("Status tip:") + itemText;

    QString whatsThisText = tr("What's This?:") + itemText;

//! [8]

    newItem->setToolTip(toolTipText);

    newItem->setStatusTip(toolTipText);

    newItem->setWhatsThis(whatsThisText);

//! [8]

}

void MainWindow::removeItem()

{

    listWidget->takeItem(listWidget->row(listWidget->currentItem()));

}

void MainWindow::updateMenus(QListWidgetItem *current)

{

    insertAction->setEnabled(current != 0);

    removeAction->setEnabled(current != 0);

}