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-rw-r--r--kdevdesigner/designer/listdnd.cpp142
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diff --git a/kdevdesigner/designer/listdnd.cpp b/kdevdesigner/designer/listdnd.cpp
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+/**********************************************************************
+** Copyright (C) 2002 Trolltech AS. All rights reserved.
+**
+** This file is part of Qt Designer.
+**
+** 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/gpl/ for GPL licensing information.
+** See http://www.trolltech.com/pricing.html or email [email protected] for
+** information about Qt Commercial License Agreements.
+**
+** Contact [email protected] if any conditions of this licensing are
+** not clear to you.
+**
+**********************************************************************/
+
+#include "listdnd.h"
+#include <qwidget.h>
+#include <qpainter.h>
+
+ListDnd::ListDnd( QScrollView * eventSource, const char * name )
+ : QObject( eventSource, name ),
+ dragInside( FALSE ), dragDelete( TRUE ), dropConfirmed( FALSE ), dMode( Both )
+{
+ src = eventSource;
+ src->setAcceptDrops( TRUE );
+ src->installEventFilter( this );
+ src->viewport()->installEventFilter( this );
+
+ line = new QWidget( src->viewport(), 0, Qt::WStyle_NoBorder | WStyle_StaysOnTop );
+ line->setBackgroundColor( Qt::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( QObject *, QEvent * event )
+{
+ switch ( event->type() ) {
+ case QEvent::DragEnter:
+ return dragEnterEvent( (QDragEnterEvent *) event );
+ case QEvent::DragLeave:
+ return dragLeaveEvent( (QDragLeaveEvent *) event );
+ case QEvent::DragMove:
+ return dragMoveEvent( (QDragMoveEvent *) event );
+ case QEvent::Drop:
+ return dropEvent( (QDropEvent *) event );
+ case QEvent::MouseButtonPress:
+ return mousePressEvent( (QMouseEvent *) event );
+ case QEvent::MouseMove:
+ return mouseMoveEvent( (QMouseEvent *) event );
+ default:
+ break;
+ }
+ return FALSE;
+}
+
+
+bool ListDnd::dragEnterEvent( QDragEnterEvent * 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( QDragLeaveEvent * )
+{
+ dragInside = FALSE;
+ line->hide();
+ return TRUE;
+}
+
+bool ListDnd::dragMoveEvent( QDragMoveEvent * event )
+{
+ if ( dragInside && dMode && !( dMode & NullDrop ) ) {
+ updateLine( event->pos() );
+ }
+ return TRUE;
+}
+
+bool ListDnd::dropEvent( QDropEvent * )
+{
+ // do nothing
+ return FALSE;
+}
+
+bool ListDnd::mousePressEvent( QMouseEvent * event )
+{
+ if ( event->button() == LeftButton )
+ mousePressPos = event->pos();
+ return FALSE;
+}
+
+bool ListDnd::mouseMoveEvent( QMouseEvent * )
+{
+ // do nothing
+ return FALSE;
+}
+
+void ListDnd::updateLine( const QPoint & )
+{
+ // do nothing
+}
+
+bool ListDnd::canDecode( QDragEnterEvent * )
+{
+ // do nothing
+ return FALSE;
+}