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