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/**********************************************************************
** Copyright (C) 2005-2008 Trolltech ASA. All rights reserved.
**
** This file is part of TQt Designer.
**
** This file may be used under the terms of the GNU General
** Public License versions 2.0 or 3.0 as published by the Free
** Software Foundation and appearing in the files LICENSE.GPL2
** and LICENSE.GPL3 included in the packaging of this file.
** Alternatively you may (at your option) use any later version
** of the GNU General Public License if such license has been
** publicly approved by Trolltech ASA (or its successors, if any)
** and the KDE Free TQt Foundation.
**
** Please review the following information to ensure GNU General
** Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/.
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at sales@trolltech.com.
**
** Licensees holding valid TQt Commercial licenses may use this file in
** accordance with the TQt Commercial License Agreement provided with
** the Software.
**
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
** herein.
**
**********************************************************************/
#include "listdnd.h"
#include <tqwidget.h>
#include <tqpainter.h>
ListDnd::ListDnd( TQScrollView * eventSource, const char * name )
: TQObject( eventSource, name ),
dragInside( FALSE ), dragDelete( TRUE ), dropConfirmed( FALSE ), dMode( Both )
{
src = eventSource;
src->setAcceptDrops( TRUE );
src->installEventFilter( this );
src->viewport()->installEventFilter( this );
line = new TQWidget( src->viewport(), 0, (WFlags)(TQt::WStyle_NoBorder | TQt::WStyle_StaysOnTop) );
line->setBackgroundColor( TQt::black );
line->resize( src->viewport()->width(), 2 );
line->hide();
}
void ListDnd::setDragMode( int mode )
{
dMode = mode;
}
int ListDnd::dragMode() const
{
return dMode;
}
bool ListDnd::eventFilter( TQObject *, TQEvent * event )
{
switch ( event->type() ) {
case TQEvent::DragEnter:
return dragEnterEvent( (TQDragEnterEvent *) event );
case TQEvent::DragLeave:
return dragLeaveEvent( (TQDragLeaveEvent *) event );
case TQEvent::DragMove:
return dragMoveEvent( (TQDragMoveEvent *) event );
case TQEvent::Drop:
return dropEvent( (TQDropEvent *) event );
case TQEvent::MouseButtonPress:
return mousePressEvent( (TQMouseEvent *) event );
case TQEvent::MouseMove:
return mouseMoveEvent( (TQMouseEvent *) event );
default:
break;
}
return FALSE;
}
bool ListDnd::dragEnterEvent( TQDragEnterEvent * event )
{
if ( dMode == None ) {
return TRUE;
}
bool ok = ( ( ( dMode & Both ) == Both ) ||
( ( dMode & Internal ) && ( event->source() == src ) ) ||
( ( dMode & External ) && ( event->source() != src ) ) );
if ( ok && canDecode( event ) ) {
event->accept();
dragInside = TRUE;
if ( !( dMode & NullDrop ) ) {
updateLine( event->pos() );
line->show();
}
}
return TRUE;
}
bool ListDnd::dragLeaveEvent( TQDragLeaveEvent * )
{
dragInside = FALSE;
line->hide();
return TRUE;
}
bool ListDnd::dragMoveEvent( TQDragMoveEvent * event )
{
if ( dragInside && dMode && !( dMode & NullDrop ) ) {
updateLine( event->pos() );
}
return TRUE;
}
bool ListDnd::dropEvent( TQDropEvent * )
{
// do nothing
return FALSE;
}
bool ListDnd::mousePressEvent( TQMouseEvent * event )
{
if ( event->button() == Qt::LeftButton )
mousePressPos = event->pos();
return FALSE;
}
bool ListDnd::mouseMoveEvent( TQMouseEvent * )
{
// do nothing
return FALSE;
}
void ListDnd::updateLine( const TQPoint & )
{
// do nothing
}
bool ListDnd::canDecode( TQDragEnterEvent * )
{
// do nothing
return FALSE;
}
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