C++/Qt/QAction — различия между версиями
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Текущая версия на 13:25, 25 мая 2010
Содержание
Link QAction and button
<source lang="cpp"> Foundations of Qt Development\Chapter04\sdi\main.cpp /*
* Copyright (c) 2006-2007, Johan Thelin * * All rights reserved. * * 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 APress 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. * */
- include <QApplication>
- include "sdiwindow.h"
int main( int argc, char **argv ) {
QApplication app( argc, argv ); (new SdiWindow)->show(); return app.exec();
}
Foundations of Qt Development\Chapter04\sdi\sdiwindow.cpp /*
* Copyright (c) 2006-2007, Johan Thelin * * All rights reserved. * * 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 APress 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. * */
- include <QApplication>
- include <QMenuBar>
- include <QToolBar>
- include <QStatusBar>
- include <QCloseEvent>
- include <QMessageBox>
- include <QTextEdit>
- include "sdiwindow.h"
SdiWindow::SdiWindow( QWidget *parent ) : QMainWindow( parent ) {
setAttribute( Qt::WA_DeleteOnClose ); setWindowTitle( tr("%1[*] - %2" ).arg(tr("unnamed")).arg(tr("SDI")) ); docWidget = new QTextEdit( this ); setCentralWidget( docWidget ); connect( docWidget->document(), SIGNAL(modificationChanged(bool)), this, SLOT(setWindowModified(bool)) ); createActions(); createMenus(); createToolbars(); statusBar()->showMessage( tr("Done") );
}
void SdiWindow::closeEvent( QCloseEvent *event ) {
if( isSafeToClose() ) event->accept(); else event->ignore();
} bool SdiWindow::isSafeToClose() {
if( isWindowModified() ) { switch( QMessageBox::warning( this, tr("SDI"), tr("The document has unsaved changes.\n" "Do you want to save it before it is closed?"), QMessageBox::Discard | QMessageBox::Cancel ) ) { case QMessageBox::Cancel: return false; default: return true; } } return true;
}
void SdiWindow::fileNew() {
(new SdiWindow())->show();
} void SdiWindow::helpAbout() {
QMessageBox::about( this, tr("About SDI"), tr("A single document interface application.") );
} void SdiWindow::createActions() {
newAction = new QAction( QIcon(":/images/new.png"), tr("&New"), this ); newAction->setShortcut( tr("Ctrl+N") ); newAction->setStatusTip( tr("Create a new document") ); connect( newAction, SIGNAL(triggered()), this, SLOT(fileNew()) ); closeAction = new QAction( tr("&Close"), this ); closeAction->setShortcut( tr("Ctrl+W") ); closeAction->setStatusTip( tr("Close this document") ); connect( closeAction, SIGNAL(triggered()), this, SLOT(close()) ); exitAction = new QAction( tr("E&xit"), this ); exitAction->setShortcut( tr("Ctrl+Q") ); exitAction->setStatusTip( tr("Quit the application") ); connect( exitAction, SIGNAL(triggered()), qApp, SLOT(closeAllWindows()) ); cutAction = new QAction( QIcon(":/images/cut.png"), tr("Cu&t"), this ); cutAction->setShortcut( tr("Ctrl+X") ); cutAction->setStatusTip( tr("Cut") ); cutAction->setEnabled(false); connect( docWidget, SIGNAL(copyAvailable(bool)), cutAction, SLOT(setEnabled(bool)) ); connect( cutAction, SIGNAL(triggered()), docWidget, SLOT(cut()) ); copyAction = new QAction( QIcon(":/images/copy.png"), tr("&Copy"), this ); copyAction->setShortcut( tr("Ctrl+C") ); copyAction->setStatusTip( tr("Copy") ); copyAction->setEnabled(false); connect( docWidget, SIGNAL(copyAvailable(bool)), copyAction, SLOT(setEnabled(bool)) ); connect( copyAction, SIGNAL(triggered()), docWidget, SLOT(copy()) ); pasteAction = new QAction( QIcon(":/images/paste.png"), tr("&Paste"), this ); pasteAction->setShortcut( tr("Ctrl+V") ); pasteAction->setStatusTip( tr("Paste") ); connect( pasteAction, SIGNAL(triggered()), docWidget, SLOT(paste()) ); aboutAction = new QAction( tr("&About"), this ); aboutAction->setStatusTip( tr("About this application") ); connect( aboutAction, SIGNAL(triggered()), this, SLOT(helpAbout()) ); aboutQtAction = new QAction( tr("About &Qt"), this ); aboutQtAction->setStatusTip( tr("About the Qt toolkit") ); connect( aboutQtAction, SIGNAL(triggered()), qApp, SLOT(aboutQt()) );
} void SdiWindow::createMenus() {
QMenu *menu; menu = menuBar()->addMenu( tr("&File") ); menu->addAction( newAction ); menu->addAction( closeAction ); menu->addSeparator(); menu->addAction( exitAction ); menu = menuBar()->addMenu( tr("&Edit") ); menu->addAction( cutAction ); menu->addAction( copyAction ); menu->addAction( pasteAction ); menu = menuBar()->addMenu( tr("&Help") ); menu->addAction( aboutAction ); menu->addAction( aboutQtAction );
} void SdiWindow::createToolbars() {
QToolBar *toolbar; toolbar = addToolBar( tr("File") ); toolbar->addAction( newAction ); toolbar = addToolBar( tr("Edit") ); toolbar->addAction( cutAction ); toolbar->addAction( copyAction ); toolbar->addAction( pasteAction );
}
Foundations of Qt Development\Chapter04\sdi\sdiwindow.h
/*
* Copyright (c) 2006-2007, Johan Thelin * * All rights reserved. * * 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 APress 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. * */
- ifndef SDIWINDOW_H
- define SDIWINDOW_H
- include <QMainWindow>
class QAction; class QTextEdit; class SdiWindow : public QMainWindow {
Q_OBJECT
public:
SdiWindow( QWidget *parent = 0 );
protected:
void closeEvent( QCloseEvent *event );
private slots:
void fileNew(); void helpAbout();
private:
void createActions(); void createMenus(); void createToolbars(); bool isSafeToClose(); QTextEdit *docWidget; QAction *newAction; QAction *closeAction; QAction *exitAction; QAction *cutAction; QAction *copyAction; QAction *pasteAction; QAction *aboutAction; QAction *aboutQtAction;
};
- endif // SDIWINDOW_H
</source>
QAction with shortcut
<source lang="cpp"> /****************************************************************************
- 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 documentation of the Qt Toolkit.
- $QT_BEGIN_LICENSE:LGPL$
- Commercial Usage
- Licensees holding valid Qt Commercial licenses may use this file in
- accordance with the Qt 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.
- If you have questions regarding the use of this file, please contact
- Nokia at qt-info@nokia.com.
- $QT_END_LICENSE$
-
- /
- include <QtGui>
class MainWindow : public QMainWindow { public:
MainWindow(); QAction *newAct;
}; MainWindow() {
newAct = new QAction(tr("&New"), this); newAct->setShortcut(tr("Ctrl+N")); newAct->setStatusTip(tr("Create a new file")); newAct->setWhatsThis(tr("Click this option to create a new file."));
} int main() {
return 0;
}
</source>
Set up Menu bar with QAction
<source lang="cpp"> Foundations of Qt Development\Chapter08\readwriteapplication\main.cpp /*
* Copyright (c) 2006-2007, Johan Thelin * * All rights reserved. * * 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 APress 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. * */
- include <QApplication>
- include "sdiwindow.h"
int main( int argc, char **argv ) {
QApplication app( argc, argv ); (new SdiWindow)->show(); QObject::connect( &app, SIGNAL(lastWindowClosed()), &app, SLOT(quit()) ); return app.exec();
}
Foundations of Qt Development\Chapter08\readwriteapplication\sdiwindow.cpp /*
* Copyright (c) 2006-2007, Johan Thelin * * All rights reserved. * * 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 APress 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. * */
- include <QApplication>
- include <QMenuBar>
- include <QToolBar>
- include <QStatusBar>
- include <QCloseEvent>
- include <QMessageBox>
- include <QTextEdit>
- include <QFile>
- include <QTextStream>
- include <QFileDialog>
- include "sdiwindow.h"
SdiWindow::SdiWindow( QWidget *parent ) : QMainWindow( parent ) {
setAttribute( Qt::WA_DeleteOnClose ); setWindowTitle( tr("%1[*] - %2" ).arg(tr("unnamed")).arg(tr("SDI")) ); docWidget = new QTextEdit( this ); setCentralWidget( docWidget ); connect( docWidget->document(), SIGNAL(modificationChanged(bool)), this, SLOT(setWindowModified(bool)) ); createActions(); createMenus(); createToolbars(); statusBar()->showMessage( tr("Done") );
}
void SdiWindow::closeEvent( QCloseEvent *event ) {
if( isSafeToClose() ) event->accept(); else event->ignore();
}
void SdiWindow::fileNew() {
(new SdiWindow())->show();
} void SdiWindow::helpAbout() {
QMessageBox::about( this, tr("About SDI"), tr("A single document interface application.") );
} void SdiWindow::createActions() {
newAction = new QAction( QIcon(":/images/new.png"), tr("&New"), this ); newAction->setShortcut( tr("Ctrl+N") ); newAction->setStatusTip( tr("Create a new document") ); connect( newAction, SIGNAL(triggered()), this, SLOT(fileNew()) ); openAction = new QAction( tr("&Open"), this ); openAction->setShortcut( tr("Ctrl+O") ); openAction->setStatusTip( tr("Open a document") ); connect( openAction, SIGNAL(triggered()), this, SLOT(fileOpen()) ); saveAction = new QAction( tr("&Save"), this ); saveAction->setShortcut( tr("Ctrl+S") ); saveAction->setStatusTip( tr("Save the document") ); connect( saveAction, SIGNAL(triggered()), this, SLOT(fileSave()) ); saveAsAction = new QAction( tr("Save &As"), this ); saveAsAction->setStatusTip( tr("Save the document as") ); connect( saveAsAction, SIGNAL(triggered()), this, SLOT(fileSaveAs()) ); closeAction = new QAction( tr("&Close"), this ); closeAction->setShortcut( tr("Ctrl+W") ); closeAction->setStatusTip( tr("Close this document") ); connect( closeAction, SIGNAL(triggered()), this, SLOT(close()) ); exitAction = new QAction( tr("E&xit"), this ); exitAction->setShortcut( tr("Ctrl+Q") ); exitAction->setStatusTip( tr("Quit the application") ); connect( exitAction, SIGNAL(triggered()), qApp, SLOT(closeAllWindows()) ); cutAction = new QAction( QIcon(":/images/cut.png"), tr("Cu&t"), this ); cutAction->setShortcut( tr("Ctrl+X") ); cutAction->setStatusTip( tr("Cut") ); cutAction->setEnabled(false); connect( docWidget, SIGNAL(copyAvailable(bool)), cutAction, SLOT(setEnabled(bool)) ); connect( cutAction, SIGNAL(triggered()), docWidget, SLOT(cut()) ); copyAction = new QAction( QIcon(":/images/copy.png"), tr("&Copy"), this ); copyAction->setShortcut( tr("Ctrl+C") ); copyAction->setStatusTip( tr("Copy") ); copyAction->setEnabled(false); connect( docWidget, SIGNAL(copyAvailable(bool)), copyAction, SLOT(setEnabled(bool)) ); connect( copyAction, SIGNAL(triggered()), docWidget, SLOT(copy()) );
pasteAction = new QAction( QIcon(":/images/paste.png"), tr("&Paste"), this ); pasteAction->setShortcut( tr("Ctrl+V") ); pasteAction->setStatusTip( tr("Paste") ); connect( pasteAction, SIGNAL(triggered()), docWidget, SLOT(paste()) ); aboutAction = new QAction( tr("&About"), this ); aboutAction->setStatusTip( tr("About this application") ); connect( aboutAction, SIGNAL(triggered()), this, SLOT(helpAbout()) ); aboutQtAction = new QAction( tr("About &Qt"), this ); aboutQtAction->setStatusTip( tr("About the Qt toolkit") ); connect( aboutQtAction, SIGNAL(triggered()), qApp, SLOT(aboutQt()) );
} void SdiWindow::createMenus() {
QMenu *menu; menu = menuBar()->addMenu( tr("&File") ); menu->addAction( newAction ); menu->addSeparator(); menu->addAction( openAction ); menu->addAction( saveAction ); menu->addAction( saveAsAction ); menu->addSeparator(); menu->addAction( closeAction ); menu->addSeparator(); menu->addAction( exitAction ); menu = menuBar()->addMenu( tr("&Edit") ); menu->addAction( cutAction ); menu->addAction( copyAction ); menu->addAction( pasteAction ); menu = menuBar()->addMenu( tr("&Help") ); menu->addAction( aboutAction ); menu->addAction( aboutQtAction );
} void SdiWindow::createToolbars() {
QToolBar *toolbar; toolbar = addToolBar( tr("File") ); toolbar->addAction( newAction ); toolbar = addToolBar( tr("Edit") ); toolbar->addAction( cutAction ); toolbar->addAction( copyAction ); toolbar->addAction( pasteAction );
}
bool SdiWindow::isSafeToClose() {
if( isWindowModified() ) { switch( QMessageBox::warning( this, tr("SDI"), tr("The document has unsaved changes.\n" "Do you want to save it before it is closed?"), QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel ) ) { case QMessageBox::Cancel: return false; case QMessageBox::Save: return fileSave(); default: return true; } } return true;
} void SdiWindow::fileOpen() {
QString filename = QFileDialog::getOpenFileName( this ); if( filename.isEmpty() ) return; if( currentFilename.isEmpty() && !docWidget->document()->isModified() ) loadFile( filename ); else { SdiWindow *window = new SdiWindow(); window->loadFile( filename ); window->show(); }
} bool SdiWindow::fileSave() {
if( currentFilename.isEmpty() ) return fileSaveAs(); else return saveFile( currentFilename );
} bool SdiWindow::fileSaveAs() {
QString filename = QFileDialog::getSaveFileName( this, tr("Save As"), currentFilename ); if( filename.isEmpty() ) return false; return saveFile( filename );
} bool SdiWindow::saveFile( QString filename ) {
QFile file( filename ); if( !file.open( QIODevice::WriteOnly | QIODevice::Text ) ) { QMessageBox::warning( this, tr("SDI"), tr("Failed to save file.") ); return false; } QTextStream stream( &file ); stream << docWidget->toPlainText(); currentFilename = filename; docWidget->document()->setModified( false ); setWindowTitle( tr("%1[*] - %2" ).arg(filename).arg(tr("SDI")) ); return true;
} void SdiWindow::loadFile( QString filename ) {
QFile file( filename ); if( !file.open( QIODevice::ReadOnly | QIODevice::Text ) ) { QMessageBox::warning( this, tr("SDI"), tr("Failed to open file.") ); return; } QTextStream stream( &file ); docWidget->setPlainText( stream.readAll() ); currentFilename = filename; docWidget->document()->setModified( false ); setWindowTitle( tr("%1[*] - %2" ).arg(filename).arg(tr("SDI")) );
}
Foundations of Qt Development\Chapter08\readwriteapplication\sdiwindow.h /*
* Copyright (c) 2006-2007, Johan Thelin * * All rights reserved. * * 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 APress 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. * */
- ifndef SDIWINDOW_H
- define SDIWINDOW_H
- include <QMainWindow>
class QAction; class QTextEdit; class SdiWindow : public QMainWindow {
Q_OBJECT
public:
SdiWindow( QWidget *parent = 0 );
protected:
void closeEvent( QCloseEvent *event );
private slots:
void fileNew(); void helpAbout(); void fileOpen(); bool fileSave(); bool fileSaveAs();
private:
void createActions(); void createMenus(); void createToolbars(); bool isSafeToClose(); bool saveFile( QString filename ); void loadFile( QString filename ); QString currentFilename; QTextEdit *docWidget; QAction *newAction; QAction *openAction; QAction *saveAction; QAction *saveAsAction; QAction *closeAction; QAction *exitAction; QAction *cutAction; QAction *copyAction; QAction *pasteAction; QAction *aboutAction; QAction *aboutQtAction;
};
- endif // SDIWINDOW_H
</source>
Set up toolbar with QAction
<source lang="cpp">
Foundations of Qt Development\Chapter08\readwriteapplication\main.cpp /*
* Copyright (c) 2006-2007, Johan Thelin * * All rights reserved. * * 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 APress 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. * */
- include <QApplication>
- include "sdiwindow.h"
int main( int argc, char **argv ) {
QApplication app( argc, argv ); (new SdiWindow)->show(); QObject::connect( &app, SIGNAL(lastWindowClosed()), &app, SLOT(quit()) ); return app.exec();
}
Foundations of Qt Development\Chapter08\readwriteapplication\sdiwindow.cpp /*
* Copyright (c) 2006-2007, Johan Thelin * * All rights reserved. * * 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 APress 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. * */
- include <QApplication>
- include <QMenuBar>
- include <QToolBar>
- include <QStatusBar>
- include <QCloseEvent>
- include <QMessageBox>
- include <QTextEdit>
- include <QFile>
- include <QTextStream>
- include <QFileDialog>
- include "sdiwindow.h"
SdiWindow::SdiWindow( QWidget *parent ) : QMainWindow( parent ) {
setAttribute( Qt::WA_DeleteOnClose ); setWindowTitle( tr("%1[*] - %2" ).arg(tr("unnamed")).arg(tr("SDI")) ); docWidget = new QTextEdit( this ); setCentralWidget( docWidget ); connect( docWidget->document(), SIGNAL(modificationChanged(bool)), this, SLOT(setWindowModified(bool)) ); createActions(); createMenus(); createToolbars(); statusBar()->showMessage( tr("Done") );
}
void SdiWindow::closeEvent( QCloseEvent *event ) {
if( isSafeToClose() ) event->accept(); else event->ignore();
}
void SdiWindow::fileNew() {
(new SdiWindow())->show();
} void SdiWindow::helpAbout() {
QMessageBox::about( this, tr("About SDI"), tr("A single document interface application.") );
} void SdiWindow::createActions() {
newAction = new QAction( QIcon(":/images/new.png"), tr("&New"), this ); newAction->setShortcut( tr("Ctrl+N") ); newAction->setStatusTip( tr("Create a new document") ); connect( newAction, SIGNAL(triggered()), this, SLOT(fileNew()) ); openAction = new QAction( tr("&Open"), this ); openAction->setShortcut( tr("Ctrl+O") ); openAction->setStatusTip( tr("Open a document") ); connect( openAction, SIGNAL(triggered()), this, SLOT(fileOpen()) ); saveAction = new QAction( tr("&Save"), this ); saveAction->setShortcut( tr("Ctrl+S") ); saveAction->setStatusTip( tr("Save the document") ); connect( saveAction, SIGNAL(triggered()), this, SLOT(fileSave()) ); saveAsAction = new QAction( tr("Save &As"), this ); saveAsAction->setStatusTip( tr("Save the document as") ); connect( saveAsAction, SIGNAL(triggered()), this, SLOT(fileSaveAs()) ); closeAction = new QAction( tr("&Close"), this ); closeAction->setShortcut( tr("Ctrl+W") ); closeAction->setStatusTip( tr("Close this document") ); connect( closeAction, SIGNAL(triggered()), this, SLOT(close()) ); exitAction = new QAction( tr("E&xit"), this ); exitAction->setShortcut( tr("Ctrl+Q") ); exitAction->setStatusTip( tr("Quit the application") ); connect( exitAction, SIGNAL(triggered()), qApp, SLOT(closeAllWindows()) ); cutAction = new QAction( QIcon(":/images/cut.png"), tr("Cu&t"), this ); cutAction->setShortcut( tr("Ctrl+X") ); cutAction->setStatusTip( tr("Cut") ); cutAction->setEnabled(false); connect( docWidget, SIGNAL(copyAvailable(bool)), cutAction, SLOT(setEnabled(bool)) ); connect( cutAction, SIGNAL(triggered()), docWidget, SLOT(cut()) ); copyAction = new QAction( QIcon(":/images/copy.png"), tr("&Copy"), this ); copyAction->setShortcut( tr("Ctrl+C") ); copyAction->setStatusTip( tr("Copy") ); copyAction->setEnabled(false); connect( docWidget, SIGNAL(copyAvailable(bool)), copyAction, SLOT(setEnabled(bool)) ); connect( copyAction, SIGNAL(triggered()), docWidget, SLOT(copy()) );
pasteAction = new QAction( QIcon(":/images/paste.png"), tr("&Paste"), this ); pasteAction->setShortcut( tr("Ctrl+V") ); pasteAction->setStatusTip( tr("Paste") ); connect( pasteAction, SIGNAL(triggered()), docWidget, SLOT(paste()) ); aboutAction = new QAction( tr("&About"), this ); aboutAction->setStatusTip( tr("About this application") ); connect( aboutAction, SIGNAL(triggered()), this, SLOT(helpAbout()) ); aboutQtAction = new QAction( tr("About &Qt"), this ); aboutQtAction->setStatusTip( tr("About the Qt toolkit") ); connect( aboutQtAction, SIGNAL(triggered()), qApp, SLOT(aboutQt()) );
} void SdiWindow::createMenus() {
QMenu *menu; menu = menuBar()->addMenu( tr("&File") ); menu->addAction( newAction ); menu->addSeparator(); menu->addAction( openAction ); menu->addAction( saveAction ); menu->addAction( saveAsAction ); menu->addSeparator(); menu->addAction( closeAction ); menu->addSeparator(); menu->addAction( exitAction ); menu = menuBar()->addMenu( tr("&Edit") ); menu->addAction( cutAction ); menu->addAction( copyAction ); menu->addAction( pasteAction ); menu = menuBar()->addMenu( tr("&Help") ); menu->addAction( aboutAction ); menu->addAction( aboutQtAction );
} void SdiWindow::createToolbars() {
QToolBar *toolbar; toolbar = addToolBar( tr("File") ); toolbar->addAction( newAction ); toolbar = addToolBar( tr("Edit") ); toolbar->addAction( cutAction ); toolbar->addAction( copyAction ); toolbar->addAction( pasteAction );
}
bool SdiWindow::isSafeToClose() {
if( isWindowModified() ) { switch( QMessageBox::warning( this, tr("SDI"), tr("The document has unsaved changes.\n" "Do you want to save it before it is closed?"), QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel ) ) { case QMessageBox::Cancel: return false; case QMessageBox::Save: return fileSave(); default: return true; } } return true;
} void SdiWindow::fileOpen() {
QString filename = QFileDialog::getOpenFileName( this ); if( filename.isEmpty() ) return; if( currentFilename.isEmpty() && !docWidget->document()->isModified() ) loadFile( filename ); else { SdiWindow *window = new SdiWindow(); window->loadFile( filename ); window->show(); }
} bool SdiWindow::fileSave() {
if( currentFilename.isEmpty() ) return fileSaveAs(); else return saveFile( currentFilename );
} bool SdiWindow::fileSaveAs() {
QString filename = QFileDialog::getSaveFileName( this, tr("Save As"), currentFilename ); if( filename.isEmpty() ) return false; return saveFile( filename );
} bool SdiWindow::saveFile( QString filename ) {
QFile file( filename ); if( !file.open( QIODevice::WriteOnly | QIODevice::Text ) ) { QMessageBox::warning( this, tr("SDI"), tr("Failed to save file.") ); return false; } QTextStream stream( &file ); stream << docWidget->toPlainText(); currentFilename = filename; docWidget->document()->setModified( false ); setWindowTitle( tr("%1[*] - %2" ).arg(filename).arg(tr("SDI")) ); return true;
} void SdiWindow::loadFile( QString filename ) {
QFile file( filename ); if( !file.open( QIODevice::ReadOnly | QIODevice::Text ) ) { QMessageBox::warning( this, tr("SDI"), tr("Failed to open file.") ); return; } QTextStream stream( &file ); docWidget->setPlainText( stream.readAll() ); currentFilename = filename; docWidget->document()->setModified( false ); setWindowTitle( tr("%1[*] - %2" ).arg(filename).arg(tr("SDI")) );
}
Foundations of Qt Development\Chapter08\readwriteapplication\sdiwindow.h /*
* Copyright (c) 2006-2007, Johan Thelin * * All rights reserved. * * 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 APress 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. * */
- ifndef SDIWINDOW_H
- define SDIWINDOW_H
- include <QMainWindow>
class QAction; class QTextEdit; class SdiWindow : public QMainWindow {
Q_OBJECT
public:
SdiWindow( QWidget *parent = 0 );
protected:
void closeEvent( QCloseEvent *event );
private slots:
void fileNew(); void helpAbout(); void fileOpen(); bool fileSave(); bool fileSaveAs();
private:
void createActions(); void createMenus(); void createToolbars(); bool isSafeToClose(); bool saveFile( QString filename ); void loadFile( QString filename ); QString currentFilename; QTextEdit *docWidget; QAction *newAction; QAction *openAction; QAction *saveAction; QAction *saveAsAction; QAction *closeAction; QAction *exitAction; QAction *cutAction; QAction *copyAction; QAction *pasteAction; QAction *aboutAction; QAction *aboutQtAction;
};
- endif // SDIWINDOW_H
</source>