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| author | Alexis Menard <alexis.menard@nokia.com> | 2009-04-17 14:06:06 (GMT) |
|---|---|---|
| committer | Alexis Menard <alexis.menard@nokia.com> | 2009-04-17 14:06:06 (GMT) |
| commit | f15b8a83e2e51955776a3f07cb85ebfc342dd8ef (patch) | |
| tree | c5dc684986051654898db11ce73e03b9fec8db99 /examples/mainwindows/mdi/mdichild.cpp | |
| download | Qt-f15b8a83e2e51955776a3f07cb85ebfc342dd8ef.zip Qt-f15b8a83e2e51955776a3f07cb85ebfc342dd8ef.tar.gz Qt-f15b8a83e2e51955776a3f07cb85ebfc342dd8ef.tar.bz2 | |
Initial import of statemachine branch from the old kinetic repository
Diffstat (limited to 'examples/mainwindows/mdi/mdichild.cpp')
| -rw-r--r-- | examples/mainwindows/mdi/mdichild.cpp | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/examples/mainwindows/mdi/mdichild.cpp b/examples/mainwindows/mdi/mdichild.cpp new file mode 100644 index 0000000..1433450 --- /dev/null +++ b/examples/mainwindows/mdi/mdichild.cpp @@ -0,0 +1,176 @@ +/**************************************************************************** +** +** 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 "mdichild.h" + +MdiChild::MdiChild() +{ + setAttribute(Qt::WA_DeleteOnClose); + isUntitled = true; +} + +void MdiChild::newFile() +{ + static int sequenceNumber = 1; + + isUntitled = true; + curFile = tr("document%1.txt").arg(sequenceNumber++); + setWindowTitle(curFile + "[*]"); + + connect(document(), SIGNAL(contentsChanged()), + this, SLOT(documentWasModified())); +} + +bool MdiChild::loadFile(const QString &fileName) +{ + QFile file(fileName); + if (!file.open(QFile::ReadOnly | QFile::Text)) { + QMessageBox::warning(this, tr("MDI"), + tr("Cannot read file %1:\n%2.") + .arg(fileName) + .arg(file.errorString())); + return false; + } + + QTextStream in(&file); + QApplication::setOverrideCursor(Qt::WaitCursor); + setPlainText(in.readAll()); + QApplication::restoreOverrideCursor(); + + setCurrentFile(fileName); + + connect(document(), SIGNAL(contentsChanged()), + this, SLOT(documentWasModified())); + + return true; +} + +bool MdiChild::save() +{ + if (isUntitled) { + return saveAs(); + } else { + return saveFile(curFile); + } +} + +bool MdiChild::saveAs() +{ + QString fileName = QFileDialog::getSaveFileName(this, tr("Save As"), + curFile); + if (fileName.isEmpty()) + return false; + + return saveFile(fileName); +} + +bool MdiChild::saveFile(const QString &fileName) +{ + QFile file(fileName); + if (!file.open(QFile::WriteOnly | QFile::Text)) { + QMessageBox::warning(this, tr("MDI"), + tr("Cannot write file %1:\n%2.") + .arg(fileName) + .arg(file.errorString())); + return false; + } + + QTextStream out(&file); + QApplication::setOverrideCursor(Qt::WaitCursor); + out << toPlainText(); + QApplication::restoreOverrideCursor(); + + setCurrentFile(fileName); + return true; +} + +QString MdiChild::userFriendlyCurrentFile() +{ + return strippedName(curFile); +} + +void MdiChild::closeEvent(QCloseEvent *event) +{ + if (maybeSave()) { + event->accept(); + } else { + event->ignore(); + } +} + +void MdiChild::documentWasModified() +{ + setWindowModified(document()->isModified()); +} + +bool MdiChild::maybeSave() +{ + if (document()->isModified()) { + QMessageBox::StandardButton ret; + ret = QMessageBox::warning(this, tr("MDI"), + tr("'%1' has been modified.\n" + "Do you want to save your changes?") + .arg(userFriendlyCurrentFile()), + QMessageBox::Save | QMessageBox::Discard + | QMessageBox::Cancel); + if (ret == QMessageBox::Save) + return save(); + else if (ret == QMessageBox::Cancel) + return false; + } + return true; +} + +void MdiChild::setCurrentFile(const QString &fileName) +{ + curFile = QFileInfo(fileName).canonicalFilePath(); + isUntitled = false; + document()->setModified(false); + setWindowModified(false); + setWindowTitle(userFriendlyCurrentFile() + "[*]"); +} + +QString MdiChild::strippedName(const QString &fullFileName) +{ + return QFileInfo(fullFileName).fileName(); +} |