QTreeWidget Drag and Drop

[jpn]

QAbstractItemModel::dropMimeData() is called by QAbstractItemView::dropEvent() so reimplementing dropEvent() without calling the base class implementation prevents dropMimeData() from being called. Furthermore, reimplementing other drag and drop related event handlers, again, without calling the base class implementation like in the code above, prevents QAbstractItemView DND from functioning properly. Take a look at src/gui/itemviews/qabstractitemview.cpp and see what QAbstractItemView::dragEnterEvent() and QAbstractItemView::dragMoveEvent() do. Writing:

void myQTTreeWidget::dragEnterEvent(QDragEnterEvent *e)
{
    e->accept();
}
 
void myQTTreeWidget::dragMoveEvent(QDragMoveEvent *e)
{
    e->accept();       
}

void myQTTreeWidget::dragEnterEvent(QDragEnterEvent *e)
{
    e->accept();
}
 
void myQTTreeWidget::dragMoveEvent(QDragMoveEvent *e)
{
    e->accept();       
}

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overrides all that functionality with.. nothing.