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Diffstat (limited to 'examples/itemviews/editabletreemodel/mainwindow.cpp')
-rw-r--r-- | examples/itemviews/editabletreemodel/mainwindow.cpp | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/examples/itemviews/editabletreemodel/mainwindow.cpp b/examples/itemviews/editabletreemodel/mainwindow.cpp new file mode 100644 index 0000000000..6f08ced0e9 --- /dev/null +++ b/examples/itemviews/editabletreemodel/mainwindow.cpp @@ -0,0 +1,180 @@ +/**************************************************************************** +** +** Copyright (C) 2011 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. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#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)); + } +} |