QListWidget Drag and Drop problem

[winkle99]

Hi,

I'm working on a project where I need to drag data from one QListWidget to another and I'm missing something simple. When I select an item to drag it's being marked/displayed as forbidden. I'm stumped as to why.

I have a class derived from QListWidget. In the constructor I set:

setDragEnabled( true );
viewport()->setAcceptDrops( true );
setDragDropMode( QAbstractItemView::DragDrop );
setDropIndicatorShown( true );

setDragEnabled( true );
viewport()->setAcceptDrops( true );
setDragDropMode( QAbstractItemView::DragDrop );
setDropIndicatorShown( true );

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I've derived a mousePressEvent method which I'm keeping really simple at this point:

void ModifyParamSetListWidget::mousePressEvent( QMouseEvent *event )
{
	QListWidgetItem *anItem = itemAt( event->pos() );
	if ( !anItem )
	{
		event->ignore();
		QListWidget::mousePressEvent( event);
		return;
	}
	if ( event->button() == Qt::LeftButton )
	{
		QDrag *drag = new QDrag( this );
		QMimeData *mimeData = new QMimeData;
		mimeData->setText( anItem->data( Qt::DisplayRole).toString() );
		drag->setMimeData( mimeData );
 		Qt::DropAction dropAction = drag->exec( Qt::CopyAction );
	} 
	else 
	{
		QListWidget::mousePressEvent( event );
	}
	return;	
}

void ModifyParamSetListWidget::mousePressEvent( QMouseEvent *event )
{
	QListWidgetItem *anItem = itemAt( event->pos() );
	if ( !anItem )
	{
		event->ignore();
		QListWidget::mousePressEvent( event);
		return;
	}
	if ( event->button() == Qt::LeftButton )
	{
		QDrag *drag = new QDrag( this );
		QMimeData *mimeData = new QMimeData;
		mimeData->setText( anItem->data( Qt::DisplayRole).toString() );
		drag->setMimeData( mimeData );
 		Qt::DropAction dropAction = drag->exec( Qt::CopyAction );
	} 
	else 
	{
		QListWidget::mousePressEvent( event );
	}
	return;	
}

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I'm just adding adding standard list widget items to the list.

QListWidgetItem *item = new QListWidgetItem();
item->setFlags(  Qt::ItemIsSelectable | Qt::ItemIsEnabled | Qt::ItemIsDropEnabled | Qt::ItemIsDragEnabled );
item->setText( itsName );

QListWidgetItem *item = new QListWidgetItem();
item->setFlags(  Qt::ItemIsSelectable | Qt::ItemIsEnabled | Qt::ItemIsDropEnabled | Qt::ItemIsDragEnabled );
item->setText( itsName );

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The problem I'm having is that when I select an item in the list to drag it's being marked as forbidden. I can't figure out what I've missed. I think it's something simple and obvious I'm just missing it. Can anyone help me out here?

thanks