/**************************************************************************** ** ** 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 a Qt Solutions component. ** ** Commercial Usage ** Licensees holding valid Qt Commercial licenses may use this file in ** accordance with the Qt Solutions Commercial License Agreement provided ** with the Software or, alternatively, in accordance with the terms ** contained in a written agreement between you and Nokia. ** ** 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. ** ** 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. ** ** Please note Third Party Software included with Qt Solutions may impose ** additional restrictions and it is the user's responsibility to ensure ** that they have met the licensing requirements of the GPL, LGPL, or Qt ** Solutions Commercial license and the relevant license of the Third ** Party Software they are using. ** ** If you are unsure which license is appropriate for your use, please ** contact Nokia at qt-info@nokia.com. ** ****************************************************************************/ #include <qtsingleapplication.h> #include <QtCore/QFile> #include <QtGui/QMainWindow> #include <QtGui/QPrinter> #include <QtGui/QPainter> #include <QtGui/QTextEdit> #include <QtGui/QMdiArea> #include <QtCore/QTextStream> class MainWindow : public QMainWindow { Q_OBJECT public: MainWindow(); public slots: void handleMessage(const QString& message); signals: void needToShow(); private: QMdiArea *workspace; }; MainWindow::MainWindow() { workspace = new QMdiArea(this); setCentralWidget(workspace); } void MainWindow::handleMessage(const QString& message) { enum Action { Nothing, Open, Print } action; action = Nothing; QString filename = message; if (message.toLower().startsWith("/print ")) { filename = filename.mid(7); action = Print; } else if (!message.isEmpty()) { action = Open; } if (action == Nothing) { emit needToShow(); return; } QFile file(filename); QString contents; if (file.open(QIODevice::ReadOnly)) contents = file.readAll(); else contents = "[[Error: Could not load file " + filename + "]]"; QTextEdit *view = new QTextEdit; view->setPlainText(contents); switch(action) { case Print: { QPrinter printer; view->print(&printer); delete view; } break; case Open: { workspace->addSubWindow(view); view->setWindowTitle(message); view->show(); emit needToShow(); } break; default: break; }; } #include "main.moc" int main(int argc, char **argv) { QtSingleApplication instance("File loader QtSingleApplication example", argc, argv); QString message; for (int a = 1; a < argc; ++a) { message += argv[a]; if (a < argc-1) message += " "; } if (instance.sendMessage(message)) return 0; MainWindow mw; mw.handleMessage(message); mw.show(); QObject::connect(&instance, SIGNAL(messageReceived(const QString&)), &mw, SLOT(handleMessage(const QString&))); instance.setActivationWindow(&mw, false); QObject::connect(&mw, SIGNAL(needToShow()), &instance, SLOT(activateWindow())); return instance.exec(); }