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View Full Version : Hide drag and drop icon



Alundra
16th June 2014, 20:29
Hi all,
When you drag and drop from a QListView or QTreeView you have the cursor + the icon or the row of the tree.
Is it possible to hide and only keep the cursor when the drag and drop is in a QWidget ?
Thanks for the help

ChrisW67
17th June 2014, 03:44
Does QDrag::setPixmap() with an empty QPixmap do it?

Alundra
17th June 2014, 04:47
Thanks, that works using this code :


class CListView : public QListView
{
public:

CListView( QWidget* Parent ) :
QListView( Parent )
{
}

protected:

virtual void startDrag( Qt::DropActions supportedActions )
{
QDrag Drag( this );
const QModelIndexList indexes = selectedIndexes();
Drag.setMimeData( model()->mimeData( indexes ) );
Drag.exec( supportedActions );
}
};

Is it possible to only hide the pixmap when it's outside of the QListView ?
Maybe "dragLeaveEvent ( QDragLeaveEvent * e )" is a way to think about but then "QDrag Drag( this );" has to be stored ?
But still the problem of "m_DetailList->setViewMode( QListView::IconMode );".
It's impossible to drag and drop internaly using QListView with IconMode.
Using "QListView::ListMode" that works normally.
I hope you know the solution.

EDIT : Apparently it's because "m_DetailList->setMovement( QListView::Static );"
But without it, you can move items that is not good for what I do, does a way exist to just allow drag and drop but not move ?
Thanks

EDIT2 : Here the solution of the Static problem :


m_DetailList->setMovement( QListView::Snap );



virtual void dropEvent( QDropEvent* e )
{
if( indexAt( e->pos() ).isValid() )
QListView::dropEvent( e );
else
e->ignore();
}

I do all that under your control, say me if what I do is not correct.