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/****************************************************************************
** $Id$
**
** Implementation of QMultiInputContext class
**
** Copyright (C) 2004 immodule for Qt Project. All rights reserved.
**
** This file is written to contribute to Trolltech AS under their own
** licence. You may use this file under your Qt license. Following
** description is copied from their original file headers. Contact
** immodule-qt@freedesktop.org if any conditions of this licensing are
** not clear to you.
**
**
** This file is part of the input method module of the Qt GUI Toolkit.
**
** This file may be distributed under the terms of the Q Public License
** as defined by Trolltech AS of Norway and appearing in the file
** LICENSE.QPL included in the packaging of this file.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
** licenses may use this file in accordance with the Qt Commercial License
** Agreement provided with the Software.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
** information about Qt Commercial License Agreements.
** See http://www.trolltech.com/qpl/ for QPL licensing information.
** See http://www.trolltech.com/gpl/ for GPL licensing information.
**
** Contact info@trolltech.com if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/
#ifndef QT_NO_IM
#include "qmultiinputcontext.h"
#include <qinputcontextfactory.h>
#include <qstringlist.h>
#include <qpopupmenu.h>
#ifndef QT_NO_IM_EXTENSIONS
#include <qsettings.h>
#endif
#include <cstdlib>
#define QT_NO_IM_QMULTIINPUTCONTEXT_IMINDEX
QMultiInputContext::QMultiInputContext()
: QInputContext(), _slave( 0 ), imIndex( 0 ), cachedFocus( FALSE ),
cachedFocusWidget( 0 ), cachedHolderWidget( 0 ),
beIndirectlyConnected( FALSE ), popup( NULL ), currentIMKey( QString::null )
{
keyDict.setAutoDelete( true );
keyDict.clear();
if ( getenv( "QT_IM_MODULE" ) ) {
currentIMKey = getenv( "QT_IM_MODULE" );
} else {
#ifndef QT_NO_IM_EXTENSIONS
QSettings settings;
currentIMKey = settings.readEntry( "/qt/DefaultInputMethod", "xim" );
#else
currentIMKey = "xim";
#endif
}
}
QMultiInputContext::~QMultiInputContext()
{
keyDict.clear();
}
QString QMultiInputContext::identifierName()
{
return ( slave() ) ? slave()->identifierName() : "";
}
QString QMultiInputContext::language()
{
return ( slave() ) ? slave()->language() : "";
}
#if defined(Q_WS_X11)
bool QMultiInputContext::x11FilterEvent( QWidget *keywidget, XEvent *event )
{
return ( slave() ) ? slave()->x11FilterEvent( keywidget, event ) : FALSE;
}
#endif // Q_WS_X11
bool QMultiInputContext::filterEvent( const QEvent *event )
{
#if !defined(QT_NO_IM_QMULTIINPUTCONTEXT_IMINDEX)
if ( event->type() == QEvent::KeyPress ) {
QKeyEvent *keyevent = (QKeyEvent *)event;
// filter selection key
// Control+Alt+Key_Down: change to next input method
// Control+Alt+Key_Up: change to previous input method
if ( ( keyevent->state() & Qt::ControlButton ) &&
( keyevent->state() & Qt::AltButton ) ) {
if ( keyevent->key() == Qt::Key_Up ) {
changeInputMethod( --imIndex );
return TRUE;
} else if ( keyevent->key() == Qt::Key_Down ) {
changeInputMethod( ++imIndex );
return TRUE;
}
}
}
#endif
return ( slave() ) ? slave()->filterEvent( event ) : FALSE;
}
void QMultiInputContext::reset()
{
if ( slave() )
slave()->reset();
}
void QMultiInputContext::setFocus()
{
cachedFocus = TRUE;
if ( slave() )
slave()->setFocus();
}
void QMultiInputContext::unsetFocus()
{
cachedFocus = FALSE;
if ( slave() )
slave()->unsetFocus();
}
void QMultiInputContext::setMicroFocus( int x, int y, int w, int h, QFont *f )
{
if ( slave() )
slave()->setMicroFocus( x, y, w, h, f );
}
void QMultiInputContext::mouseHandler( int x, QEvent::Type type,
Qt::ButtonState button,
Qt::ButtonState state )
{
if ( slave() )
slave()->mouseHandler( x, type, button, state );
}
QFont QMultiInputContext::font() const
{
return ( slave() ) ? slave()->font() : QInputContext::font();
}
void QMultiInputContext::destroyInputContext()
{
if ( _slave ) {
// _slave->reset() may not properly work in the case, so we
// manually resets the composing state of text widget
if ( _slave->focusWidget() ) {
QIMEvent *terminator = new QIMEvent( QEvent::IMEnd, QString::null, -1 );
emit imEventGenerated( _slave->focusWidget(), terminator );
}
_slave->deleteLater();
_slave = 0;
}
}
/*!
This function is a placeholder for future experiment or extension
such as commit string snooping. set beIndirectlyConnected = TRUE
to activate this virtual function.
*/
void QMultiInputContext::postIMEvent( QObject *receiver, QIMEvent *event )
{
emit imEventGenerated( receiver, event );
}
#if defined(Q_WS_X11)
QWidget *QMultiInputContext::focusWidget() const
{
return ( slave() ) ? slave()->focusWidget() : 0;
}
QWidget *QMultiInputContext::holderWidget() const
{
return ( slave() ) ? slave()->holderWidget() : 0;
}
void QMultiInputContext::setFocusWidget( QWidget *w )
{
cachedFocusWidget = w;
if ( slave() )
slave()->setFocusWidget( w );
}
void QMultiInputContext::setHolderWidget( QWidget *w )
{
cachedHolderWidget = w;
if ( slave() )
slave()->setHolderWidget( w );
}
void QMultiInputContext::releaseComposingWidget( QWidget *w )
{
if ( slave() )
slave()->releaseComposingWidget( w );
}
#endif
bool QMultiInputContext::isComposing() const
{
return ( slave() ) ? slave()->isComposing() : FALSE;
}
bool QMultiInputContext::isPreeditRelocationEnabled()
{
return ( slave() ) ? slave()->isPreeditRelocationEnabled() : FALSE;
}
QInputContext *QMultiInputContext::slave()
{
if ( ! _slave ) {
#if !defined(QT_NO_IM_QMULTIINPUTCONTEXT_IMINDEX)
changeInputMethod( imIndex );
#else
changeInputMethod( currentIMKey );
#endif
}
return _slave;
}
const QInputContext *QMultiInputContext::slave() const
{
return _slave;
}
void QMultiInputContext::changeInputMethod( int newIndex )
{
#if !defined(QT_NO_IM_QMULTIINPUTCONTEXT_IMINDEX)
QStringList keys = QInputContextFactory::keys();
if ( keys.size() == 0 )
return;
if ( newIndex >= (int)keys.size() ) {
imIndex = 0;
} else if ( newIndex < 0 ) {
imIndex = keys.size() - 1;
} else {
imIndex = newIndex;
}
changeInputMethod( keys[imIndex] );
#endif
}
void QMultiInputContext::changeInputMethod( QString key )
{
QStringList keys = QInputContextFactory::keys();
if ( keys.size() == 0 )
return;
if ( key.isEmpty() )
key = keys[0];
if ( _slave ) {
_slave->reset();
delete _slave;
}
_slave = QInputContextFactory::create( key, cachedHolderWidget );
if ( _slave ) {
insertChild( _slave );
const char *method;
if ( beIndirectlyConnected ) {
method = SLOT(imEventReceived(QObject *,QIMEvent *));
} else {
method = SIGNAL(imEventGenerated(QObject *,QIMEvent *));
}
connect( _slave, SIGNAL(imEventGenerated(QObject *,QIMEvent *)),
this, method );
connect( _slave, SIGNAL(deletionRequested()),
this, SLOT(destroyInputContext()) );
if ( cachedFocus ) {
_slave->setFocus();
_slave->setFocusWidget( cachedFocusWidget );
}
currentIMKey = key;
//tqDebug( "QMultiInputContext::changeInputMethod(): index=%d, slave=%s",
// imIndex, (const char *)_slave->identifierName() );
}
}
QPtrList<QInputContextMenu> *QMultiInputContext::menus()
{
QInputContextMenu *imSelMenu = new QInputContextMenu;
imSelMenu->title = tr( "Select Input &Method" );
imSelMenu->popup = createImSelPopup();
QPtrList<QInputContextMenu> *result = new QPtrList<QInputContextMenu>;
result->append( imSelMenu );
QPtrList<QInputContextMenu> *slaveMenus = ( slave() ) ? slave()->menus() : 0;
if ( slaveMenus ) {
for ( QPtrList<QInputContextMenu>::Iterator it = slaveMenus->begin();
it != slaveMenus->end();
++it ) {
QInputContextMenu *slaveMenu = *it;
result->append( slaveMenu );
}
delete slaveMenus;
}
return result;
}
QPopupMenu *QMultiInputContext::createImSelPopup()
{
if ( popup )
delete popup;
popup = new QPopupMenu();
keyDict.clear();
QStringList keys = QInputContextFactory::keys();
for ( uint i=0; i < keys.size(); i++ ) {
QString idName = keys[i];
bool isIMSwitcher = idName.startsWith( "imsw-" );
if ( ! isIMSwitcher ) {
QString dispName = QInputContextFactory::displayName( idName );
if ( dispName.isEmpty() )
dispName = idName;
int id = popup->insertItem( dispName );
keyDict.insert( (long)id, new QString( idName ) );
if ( idName == currentIMKey )
popup->setItemChecked( id, true );
QString descriptionStr = QInputContextFactory::description( idName );
if ( ! descriptionStr.isEmpty() )
popup->setWhatsThis( id, descriptionStr );
}
}
QObject::connect( popup, SIGNAL(activated(int)),
this, SLOT(changeInputMethodWithMenuId(int)) );
return popup;
}
void QMultiInputContext::changeInputMethodWithMenuId( int menuid )
{
QString *key = keyDict.find( (long)menuid );
changeInputMethod( (*key) );
}
#endif
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