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     2 **

     3 ** Copyright (C) 2009 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

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    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.

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

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

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    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     removeAction->setEnabled(false);

    58     itemsMenu->addSeparator();

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

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

    61     autoSortAction = itemsMenu->addAction(tr("&Automatically Sort Items"));

    62     autoSortAction->setCheckable(true);

    63     itemsMenu->addSeparator();

    64     QAction *findItemsAction = itemsMenu->addAction(tr("&Find Items"));

    65     findItemsAction->setShortcut(tr("Ctrl+F"));

    66 

    67     menuBar()->addMenu(fileMenu);

    68     menuBar()->addMenu(itemsMenu);

    69 

    70 /*  For convenient quoting:

    71     QTreeWidget *treeWidget = new QTreeWidget(this);

    72 */

    73     treeWidget = new QTreeWidget(this);

    74     treeWidget->setColumnCount(2);

    75     QStringList headers;

    76     headers << tr("Subject") << tr("Default");

    77     treeWidget->setHeaderLabels(headers);

    78 

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

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

    81     connect(autoSortAction, SIGNAL(triggered()), this, SLOT(updateSortItems()));

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

    83     connect(findItemsAction, SIGNAL(triggered()), this, SLOT(findItems()));

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

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

    86     connect(treeWidget,

    87             SIGNAL(currentItemChanged(QTreeWidgetItem *, QTreeWidgetItem *)),

    88             this, SLOT(updateMenus(QTreeWidgetItem *)));

    89 

    90     setupTreeItems();

    91     updateMenus(treeWidget->currentItem());

    92 

    93     setCentralWidget(treeWidget);

    94     setWindowTitle(tr("Tree Widget"));

    95 }

    96 

    97 void MainWindow::setupTreeItems()

    98 {

    99     QTreeWidgetItem *planets = new QTreeWidgetItem(treeWidget);

   100     planets->setText(0, tr("Planets"));

   101     (new QTreeWidgetItem(planets))->setText(0, tr("Mercury"));

   102     (new QTreeWidgetItem(planets))->setText(0, tr("Venus"));

   103 

   104     QTreeWidgetItem *earthItem = new QTreeWidgetItem(planets);

   105     earthItem->setText(0, tr("Earth"));

   106     earthItem->setText(1, tr("Yes"));

   107 

   108     (new QTreeWidgetItem(planets))->setText(0, tr("Mars"));

   109     (new QTreeWidgetItem(planets))->setText(0, tr("Jupiter"));

   110     (new QTreeWidgetItem(planets))->setText(0, tr("Saturn"));

   111     (new QTreeWidgetItem(planets))->setText(0, tr("Uranus"));

   112     (new QTreeWidgetItem(planets))->setText(0, tr("Neptune"));

   113     (new QTreeWidgetItem(planets))->setText(0, tr("Pluto"));

   114 }

   115 

   116 void MainWindow::findItems()

   117 {

   118     QString itemText = QInputDialog::getText(this, tr("Find Items"),

   119         tr("Text to find:"));

   120 

   121     if (itemText.isEmpty())

   122         return;

   123 

   124 //! [0]

   125     QTreeWidgetItemIterator it(treeWidget);

   126     while (*it) {

   127         if ((*it)->text(0) == itemText)

   128             (*it)->setSelected(true);

   129         ++it;

   130     }

   131 //! [0]

   132 }

   133 

   134 void MainWindow::insertItem()

   135 {

   136     QTreeWidgetItem *currentItem = treeWidget->currentItem();

   137 

   138     if (!currentItem)

   139         return;

   140 

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

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

   143 

   144     if (itemText.isEmpty())

   145         return;

   146 

   147     QTreeWidgetItem *parent = currentItem->parent();

   148     QTreeWidgetItem *newItem;

   149     if (parent)

   150         newItem = new QTreeWidgetItem(parent, treeWidget->currentItem());

   151     else

   152         newItem = new QTreeWidgetItem(treeWidget, treeWidget->currentItem());

   153 

   154     newItem->setText(0, itemText);

   155 }

   156 

   157 void MainWindow::removeItem()

   158 {

   159     QTreeWidgetItem *currentItem = treeWidget->currentItem();

   160 

   161     if (!currentItem)

   162         return;

   163 

   164     QTreeWidgetItem *parent = currentItem->parent();

   165     int index;

   166 

   167     if (parent) {

   168         index = parent->indexOfChild(treeWidget->currentItem());

   169         delete parent->takeChild(index);

   170     } else {

   171         index = treeWidget->indexOfTopLevelItem(treeWidget->currentItem());

   172         delete treeWidget->takeTopLevelItem(index);

   173     }

   174 }

   175 

   176 void MainWindow::sortAscending()

   177 {

   178     treeWidget->sortItems(0, Qt::AscendingOrder);

   179 }

   180 

   181 void MainWindow::sortDescending()

   182 {

   183     treeWidget->sortItems(0, Qt::DescendingOrder);

   184 }

   185 

   186 void MainWindow::updateMenus(QTreeWidgetItem *current)

   187 {

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

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

   190 }

   191 

   192 void MainWindow::updateSortItems()

   193 {

   194     ascendingAction->setEnabled(!autoSortAction->isChecked());

   195     descendingAction->setEnabled(!autoSortAction->isChecked());

   196 

   197     treeWidget->setSortingEnabled(autoSortAction->isChecked());

   198 }