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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtGui>
#include "mainwindow.h"
#include "treemodel.h"
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
{
setupUi(this);
QStringList headers;
headers << tr("Title") << tr("Description");
QFile file(":/default.txt");
file.open(QIODevice::ReadOnly);
TreeModel *model = new TreeModel(headers, file.readAll());
file.close();
view->setModel(model);
for (int column = 0; column < model->columnCount(); ++column)
view->resizeColumnToContents(column);
connect(exitAction, SIGNAL(triggered()), qApp, SLOT(quit()));
connect(view->selectionModel(),
SIGNAL(selectionChanged(const QItemSelection &,
const QItemSelection &)),
this, SLOT(updateActions()));
connect(actionsMenu, SIGNAL(aboutToShow()), this, SLOT(updateActions()));
connect(insertRowAction, SIGNAL(triggered()), this, SLOT(insertRow()));
connect(insertColumnAction, SIGNAL(triggered()), this, SLOT(insertColumn()));
connect(removeRowAction, SIGNAL(triggered()), this, SLOT(removeRow()));
connect(removeColumnAction, SIGNAL(triggered()), this, SLOT(removeColumn()));
connect(insertChildAction, SIGNAL(triggered()), this, SLOT(insertChild()));
updateActions();
}
void MainWindow::insertChild()
{
QModelIndex index = view->selectionModel()->currentIndex();
QAbstractItemModel *model = view->model();
if (model->columnCount(index) == 0) {
if (!model->insertColumn(0, index))
return;
}
if (!model->insertRow(0, index))
return;
for (int column = 0; column < model->columnCount(index); ++column) {
QModelIndex child = model->index(0, column, index);
model->setData(child, QVariant("[No data]"), Qt::EditRole);
if (!model->headerData(column, Qt::Horizontal).isValid())
model->setHeaderData(column, Qt::Horizontal, QVariant("[No header]"),
Qt::EditRole);
}
view->selectionModel()->setCurrentIndex(model->index(0, 0, index),
QItemSelectionModel::ClearAndSelect);
updateActions();
}
bool MainWindow::insertColumn(const QModelIndex &parent)
{
QAbstractItemModel *model = view->model();
int column = view->selectionModel()->currentIndex().column();
// Insert a column in the parent item.
bool changed = model->insertColumn(column + 1, parent);
if (changed)
model->setHeaderData(column + 1, Qt::Horizontal, QVariant("[No header]"),
Qt::EditRole);
updateActions();
return changed;
}
void MainWindow::insertRow()
{
QModelIndex index = view->selectionModel()->currentIndex();
QAbstractItemModel *model = view->model();
if (!model->insertRow(index.row()+1, index.parent()))
return;
updateActions();
for (int column = 0; column < model->columnCount(index.parent()); ++column) {
QModelIndex child = model->index(index.row()+1, column, index.parent());
model->setData(child, QVariant("[No data]"), Qt::EditRole);
}
}
bool MainWindow::removeColumn(const QModelIndex &parent)
{
QAbstractItemModel *model = view->model();
int column = view->selectionModel()->currentIndex().column();
// Insert columns in each child of the parent item.
bool changed = model->removeColumn(column, parent);
if (!parent.isValid() && changed)
updateActions();
return changed;
}
void MainWindow::removeRow()
{
QModelIndex index = view->selectionModel()->currentIndex();
QAbstractItemModel *model = view->model();
if (model->removeRow(index.row(), index.parent()))
updateActions();
}
void MainWindow::updateActions()
{
bool hasSelection = !view->selectionModel()->selection().isEmpty();
removeRowAction->setEnabled(hasSelection);
removeColumnAction->setEnabled(hasSelection);
bool hasCurrent = view->selectionModel()->currentIndex().isValid();
insertRowAction->setEnabled(hasCurrent);
insertColumnAction->setEnabled(hasCurrent);
if (hasCurrent) {
view->closePersistentEditor(view->selectionModel()->currentIndex());
int row = view->selectionModel()->currentIndex().row();
int column = view->selectionModel()->currentIndex().column();
if (view->selectionModel()->currentIndex().parent().isValid())
statusBar()->showMessage(tr("Position: (%1,%2)").arg(row).arg(column));
else
statusBar()->showMessage(tr("Position: (%1,%2) in top level").arg(row).arg(column));
}
}
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