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    41 

    42 #include <QtGui>

    43 

    44 #include "mainwindow.h"

    45 #include "model.h"

    46 

    47 /*!

    48     The main window constructor creates and populates a model with values

    49     from a string list then displays the contents of the model using a

    50     QListView widget.

    51 */

    52 

    53 MainWindow::MainWindow(QWidget *parent)

    54     : QMainWindow(parent)

    55 {

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

    57 

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

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

    60 

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

    62 

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

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

    65 

    66     menuBar()->addMenu(fileMenu);

    67     menuBar()->addMenu(itemsMenu);

    68 

    69     QStringList numbers;

    70     numbers << tr("One") << tr("Two") << tr("Three") << tr("Four") << tr("Five")

    71             << tr("Six") << tr("Seven") << tr("Eight") << tr("Nine") << tr("Ten");

    72 

    73     model = new StringListModel(numbers);

    74     QListView *view = new QListView(this);

    75     view->setModel(model);

    76 

    77     selectionModel = view->selectionModel();

    78 

    79     connect(quitAction, SIGNAL(triggered()), qApp, SLOT(quit()));

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

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

    82     connect(selectionModel,

    83             SIGNAL(currentChanged(const QModelIndex &, const QModelIndex &)),

    84             this, SLOT(updateMenus(const QModelIndex &)));

    85     

    86     setCentralWidget(view);

    87     setWindowTitle("View onto a string list model");

    88 }

    89 

    90 void MainWindow::insertItem()

    91 {

    92     if (!selectionModel->currentIndex().isValid())

    93         return;

    94 

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

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

    97 

    98     if (itemText.isNull())

    99         return;

   100 

   101     int row = selectionModel->currentIndex().row();

   102 

   103     if (model->insertRows(row, 1))

   104         model->setData(model->index(row, 0), itemText, Qt::EditRole);

   105 }

   106 

   107 void MainWindow::removeItem()

   108 {

   109     if (!selectionModel->currentIndex().isValid())

   110         return;

   111 

   112     int row = selectionModel->currentIndex().row();

   113 

   114     model->removeRows(row, 1);

   115 }

   116 

   117 void MainWindow::updateMenus(const QModelIndex &currentIndex)

   118 {

   119     insertAction->setEnabled(currentIndex.isValid());

   120     removeAction->setEnabled(currentIndex.isValid());

   121 }