MdiWindow based editor
Foundations of Qt Development\Chapter04\mdi\documentwindow.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 "documentwindow.h"
DocumentWindow::DocumentWindow( QWidget *parent ) : QTextEdit( parent )
{
setAttribute( Qt::WA_DeleteOnClose );
setWindowTitle( tr("%1[*]" ).arg("unnamed") );
connect( document(), SIGNAL(modificationChanged(bool)), this, SLOT(setWindowModified(bool)) );
}
void DocumentWindow::closeEvent( QCloseEvent *event )
{
if( isSafeToClose() )
event->accept();
else
event->ignore();
}
bool DocumentWindow::isSafeToClose()
{
if( document()->isModified() )
{
switch( QMessageBox::warning( this, tr("MDI"),
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;
}
Foundations of Qt Development\Chapter04\mdi\documentwindow.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 DOCUMENTWINDOW_H
#define DOCUMENTWINDOW_H
#include <QTextEdit>
class DocumentWindow : public QTextEdit
{
Q_OBJECT
public:
DocumentWindow( QWidget *parent = 0 );
protected:
void closeEvent( QCloseEvent *event );
private:
bool isSafeToClose();
};
#endif // DOCUMENTWINDOW_H
Foundations of Qt Development\Chapter04\mdi\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 "mdiwindow.h"
int main( int argc, char **argv )
{
QApplication app( argc, argv );
MdiWindow win;
win.show();
return app.exec();
}
Foundations of Qt Development\Chapter04\mdi\mdiwindow.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 <QWorkspace>
#include <QSignalMapper>
#include "mdiwindow.h"
#include "documentwindow.h"
MdiWindow::MdiWindow( QWidget *parent ) : QMainWindow( parent )
{
setWindowTitle( tr( "MDI" ) );
workspace = new QWorkspace;
setCentralWidget( workspace );
connect( workspace, SIGNAL(windowActivated(QWidget *)), this, SLOT(enableActions()));
mapper = new QSignalMapper( this );
connect( mapper, SIGNAL(mapped(QWidget*)), workspace, SLOT(setActiveWindow(QWidget*)) );
createActions();
createMenus();
createToolbars();
statusBar()->showMessage( tr("Done") );
enableActions();
}
void MdiWindow::closeEvent( QCloseEvent *event )
{
workspace->closeAllWindows();
if( !activeDocument() )
event->accept();
else
event->ignore();
}
void MdiWindow::fileNew()
{
DocumentWindow *document = new DocumentWindow;
workspace->addWindow( document );
connect( document, SIGNAL(copyAvailable(bool)), cutAction, SLOT(setEnabled(bool)) );
connect( document, SIGNAL(copyAvailable(bool)), copyAction, SLOT(setEnabled(bool)) );
document->show();
}
void MdiWindow::helpAbout()
{
QMessageBox::about( this, tr("About MDI"), tr("A multiple document interface application.") );
}
DocumentWindow *MdiWindow::activeDocument()
{
return qobject_cast<DocumentWindow*>(workspace->activeWindow());
}
void MdiWindow::enableActions()
{
bool hasDocuments = (activeDocument() != 0 );
closeAction->setEnabled( hasDocuments );
pasteAction->setEnabled( hasDocuments );
tileAction->setEnabled( hasDocuments );
cascadeAction->setEnabled( hasDocuments );
nextAction->setEnabled( hasDocuments );
previousAction->setEnabled( hasDocuments );
separatorAction->setVisible( hasDocuments );
bool hasSelection = hasDocuments && activeDocument()->textCursor().hasSelection();
cutAction->setEnabled( hasSelection );
copyAction->setEnabled( hasSelection );
}
void MdiWindow::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()), workspace, SLOT(closeActiveWindow()) );
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( cutAction, SIGNAL(triggered()), this, SLOT(editCut()) );
copyAction = new QAction( QIcon(":/images/copy.png"), tr("&Copy"), this );
copyAction->setShortcut( tr("Ctrl+C") );
copyAction->setStatusTip( tr("Copy") );
copyAction->setEnabled(false);
connect( copyAction, SIGNAL(triggered()), this, SLOT(editCopy()) );
pasteAction = new QAction( QIcon(":/images/paste.png"), tr("&Paste"), this );
pasteAction->setShortcut( tr("Ctrl+V") );
pasteAction->setStatusTip( tr("Paste") );
connect( pasteAction, SIGNAL(triggered()), this, SLOT(editPaste()) );
tileAction = new QAction( tr("&Tile"), this );
tileAction->setStatusTip( tr("Tile the windows") );
connect( tileAction, SIGNAL(triggered()), workspace, SLOT(tile()) );
cascadeAction = new QAction( tr("&Cascade"), this );
cascadeAction->setStatusTip( tr("Cascade the windows") );
connect( cascadeAction, SIGNAL(triggered()), workspace, SLOT(cascade()) );
nextAction = new QAction( tr("&Next window"), this );
nextAction->setStatusTip( tr("Move to the next window") );
connect( nextAction, SIGNAL(triggered()), workspace, SLOT(activateNextWindow()) );
previousAction = new QAction( tr("&Previous window"), this );
previousAction->setStatusTip( tr("Move to the previous window") );
connect( previousAction, SIGNAL(triggered()), workspace, SLOT(activatePreviousWindow()) );
separatorAction = new QAction( this );
separatorAction->setSeparator( true );
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 MdiWindow::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 );
windowMenu = menuBar()->addMenu( tr("&Window") );
connect( windowMenu, SIGNAL(aboutToShow()), this, SLOT(updateWindowList()) );
menu = menuBar()->addMenu( tr("&Help") );
menu->addAction( aboutAction );
menu->addAction( aboutQtAction );
}
void MdiWindow::createToolbars()
{
QToolBar *toolbar;
toolbar = addToolBar( tr("File") );
toolbar->addAction( newAction );
toolbar = addToolBar( tr("Edit") );
toolbar->addAction( cutAction );
toolbar->addAction( copyAction );
toolbar->addAction( pasteAction );
}
void MdiWindow::editCut()
{
activeDocument()->cut();
}
void MdiWindow::editCopy()
{
activeDocument()->copy();
}
void MdiWindow::editPaste()
{
activeDocument()->paste();
}
void MdiWindow::updateWindowList()
{
windowMenu->clear();
windowMenu->addAction( tileAction );
windowMenu->addAction( cascadeAction );
windowMenu->addSeparator();
windowMenu->addAction( nextAction );
windowMenu->addAction( previousAction );
windowMenu->addAction( separatorAction );
int i=1;
foreach( QWidget *w, workspace->windowList() )
{
QString text;
if( i<10 )
text = tr("&%1 %2").arg( i++ ).arg( w->windowTitle() );
else
text = w->windowTitle();
QAction *action = windowMenu->addAction( text );
action->setCheckable( true );
action->setChecked( w == activeDocument() );
connect( action, SIGNAL(triggered()), mapper, SLOT(map()) );
mapper->setMapping( action, w );
}
}
Foundations of Qt Development\Chapter04\mdi\mdiwindow.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 MDIWINDOW_H
#define MDIWINDOW_H
#include <QMainWindow>
class QAction;
class QWorkspace;
class QSignalMapper;
class QMenu;
class DocumentWindow;
class MdiWindow : public QMainWindow
{
Q_OBJECT
public:
MdiWindow( QWidget *parent = 0 );
protected:
void closeEvent( QCloseEvent *event );
private slots:
void fileNew();
void editCut();
void editCopy();
void editPaste();
void helpAbout();
void enableActions();
void updateWindowList();
private:
void createActions();
void createMenus();
void createToolbars();
DocumentWindow *activeDocument();
QWorkspace *workspace;
QSignalMapper *mapper;
QAction *newAction;
QAction *closeAction;
QAction *exitAction;
QAction *cutAction;
QAction *copyAction;
QAction *pasteAction;
QAction *tileAction;
QAction *cascadeAction;
QAction *nextAction;
QAction *previousAction;
QAction *separatorAction;
QAction *aboutAction;
QAction *aboutQtAction;
QMenu *windowMenu;
};
#endif // MDIWINDOW_H
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