1 /****************************************************************************

     2 **

     3 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the documentation of the Qt Toolkit.

     8 **

     9 ** $QT_BEGIN_LICENSE:LGPL$

    10 ** No Commercial Usage

    11 ** This file contains pre-release code and may not be distributed.

    12 ** You may use this file in accordance with the terms and conditions

    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

    15 **

    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

    19 ** Foundation and appearing in the file LICENSE.LGPL included in the

    20 ** packaging of this file.  Please review the following information to

    21 ** ensure the GNU Lesser General Public License version 2.1 requirements

    22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

    23 **

    24 ** In addition, as a special exception, Nokia gives you certain additional

    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception

    26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

    27 **

    28 ** If you have questions regarding the use of this file, please contact

    29 ** Nokia at qt-info@nokia.com.

    30 **

    31 **

    32 **

    33 **

    34 **

    35 **

    36 **

    37 **

    38 ** $QT_END_LICENSE$

    39 **

    40 ****************************************************************************/

    41 

    42 #include <QtGui>

    43 

    44 #include "mainwindow.h"

    45 

    46 MainWindow::MainWindow()

    47 {

    48     QMenu *fileMenu = new QMenu(tr("&File"));

    49 

    50     QAction *quitAction = fileMenu->addAction(tr("E&xit"));

    51     quitAction->setShortcut(tr("Ctrl+Q"));

    52 

    53     QMenu *itemsMenu = new QMenu(tr("&Items"));

    54 

    55     insertAction = itemsMenu->addAction(tr("&Insert Item"));

    56     removeAction = itemsMenu->addAction(tr("&Remove Item"));

    57     QAction *ascendingAction = itemsMenu->addAction(tr("Sort in &Ascending Order"));

    58     QAction *descendingAction = itemsMenu->addAction(tr("Sort in &Descending Order"));

    59 

    60     menuBar()->addMenu(fileMenu);

    61     menuBar()->addMenu(itemsMenu);

    62 

    63 /*  For convenient quoting:

    64 //! [0]

    65     QListWidget *listWidget = new QListWidget(this);

    66 //! [0]

    67 */

    68     listWidget = new QListWidget(this);

    69     listWidget->setSelectionMode(QAbstractItemView::SingleSelection);

    70 

    71     connect(quitAction, SIGNAL(triggered()), this, SLOT(close()));

    72     connect(ascendingAction, SIGNAL(triggered()), this, SLOT(sortAscending()));

    73     connect(descendingAction, SIGNAL(triggered()), this, SLOT(sortDescending()));

    74     connect(insertAction, SIGNAL(triggered()), this, SLOT(insertItem()));

    75     connect(removeAction, SIGNAL(triggered()), this, SLOT(removeItem()));

    76     connect(listWidget,

    77             SIGNAL(currentItemChanged(QListWidgetItem *, QListWidgetItem *)),

    78             this, SLOT(updateMenus(QListWidgetItem *)));

    79 

    80     setupListItems();

    81     updateMenus(listWidget->currentItem());

    82 

    83     setCentralWidget(listWidget);

    84     setWindowTitle(tr("List Widget"));

    85 }

    86 

    87 void MainWindow::setupListItems()

    88 {

    89 //! [1]

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

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

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

    93 //! [1]

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

    95 //! [2]

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

    97 //! [2]

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

    99 //! [3]

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

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

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

   103 //! [3]

   104 }

   105 

   106 void MainWindow::sortAscending()

   107 {

   108 //! [4]

   109     listWidget->sortItems(Qt::AscendingOrder);

   110 //! [4]

   111 }

   112 

   113 void MainWindow::sortDescending()

   114 {

   115 //! [5]

   116     listWidget->sortItems(Qt::DescendingOrder);

   117 //! [5]

   118 }

   119 

   120 void MainWindow::insertItem()

   121 {

   122     if (!listWidget->currentItem())

   123         return;

   124 

   125     QString itemText = QInputDialog::getText(this, tr("Insert Item"),

   126         tr("Input text for the new item:"));

   127 

   128     if (itemText.isNull())

   129         return;

   130 

   131 //! [6]

   132     QListWidgetItem *newItem = new QListWidgetItem;

   133     newItem->setText(itemText);

   134 //! [6]

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

   136 //! [7]

   137     listWidget->insertItem(row, newItem);

   138 //! [7]

   139 

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

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

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

   143 //! [8]

   144     newItem->setToolTip(toolTipText);

   145     newItem->setStatusTip(toolTipText);

   146     newItem->setWhatsThis(whatsThisText);

   147 //! [8]

   148 }

   149 

   150 void MainWindow::removeItem()

   151 {

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

   153 }

   154 

   155 void MainWindow::updateMenus(QListWidgetItem *current)

   156 {

   157     insertAction->setEnabled(current != 0);

   158     removeAction->setEnabled(current != 0);

   159 }