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#include <QtGui>

#include "mainwindow.h"

#include "model.h"

/*!

    The main window constructor creates and populates a model with values

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

    QListView widget.

*/

MainWindow::MainWindow(QWidget *parent)

    : QMainWindow(parent)

{

    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"));

    menuBar()->addMenu(fileMenu);

    menuBar()->addMenu(itemsMenu);

    QStringList numbers;

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

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

    model = new StringListModel(numbers);

    QListView *view = new QListView(this);

    view->setModel(model);

    selectionModel = view->selectionModel();

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

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

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

    connect(selectionModel,

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

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

    setCentralWidget(view);

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

}

void MainWindow::insertItem()

{

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

        return;

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

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

    if (itemText.isNull())

        return;

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

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

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

}

void MainWindow::removeItem()

{

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

        return;

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

    model->removeRows(row, 1);

}

void MainWindow::updateMenus(const QModelIndex &currentIndex)

{

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

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

}