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Diffstat (limited to 'examples/itemviews/editabletreemodel/mainwindow.cpp')
| -rw-r--r-- | examples/itemviews/editabletreemodel/mainwindow.cpp | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/examples/itemviews/editabletreemodel/mainwindow.cpp b/examples/itemviews/editabletreemodel/mainwindow.cpp new file mode 100644 index 0000000..f81b2fe --- /dev/null +++ b/examples/itemviews/editabletreemodel/mainwindow.cpp @@ -0,0 +1,181 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (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 either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@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)); + } +} |