get control back on dragged items

4n0d3v

hey guys,
I got an issue with Qt 5.15.2 and items dragged from a list...

the code :
draglist.h

#define DRAGLIST_H

#include <QListWidget>
#include <QMimeData>

class DragList : public QListWidget
{
    Q_OBJECT
public:
    explicit DragList(QWidget *parent = nullptr);

protected:
    QMimeData *mimeData(const QList<QListWidgetItem*> items) const
    {
        QString s="";
        foreach (auto item, items)
            s += item->text() + "\n";
        QMimeData *md = QListWidget::mimeData(items);
        md->setText(s.left(s.length()-1));
        return md;
    }
};

#endif // DRAGLIST_H

draglist.cpp

#include "draglist.h"

DragList::DragList(QWidget *parent)
    : QListWidget(parent)
{
}

I use that very simple class to be able to drag items (url actually) from a QListWidget
So you can easily reproduce : just throw a QListWidget on a form and check its dragEnabled field, change its dragDropMode to DragOnly and promote it to DragList and voilà !
oh yes just add an entry to the list, let's say "https://www.google.com"

.

The issue :

if you drag that item (https://www.google.com) and drop it into a Chrome window, it opens a google page and your item is still present into the QListWidget component. But do the very same thing with a Firefox window and your item disappears from the list.

.

Solutions ?

Is there a way to tells Qt that items of this QlistWidget won't be transferred but only copied - no matter what - ? (knowing we already got the defaultDropAction of that QListWidget set to CopyAction, but i guess this property is about things dropped into that list, not about the action to take after one of its items was dropped)
Or is there a way to intercept the drop message to ignore it (as somehow chrome says to my Qt app "i copied that item" while firefox says "thank u for givin me that item, hope u won't miss it too much ;)")

Thank you for your time, guys and hopefully your solutions :)

By the way i know as a workaround i might answer to the event of selection changing or item deletion by simply saving the selection before the drag and re-add the potentially missing items if needed, but I would like a more elegant solution which doesn't involve repairing the damage, but preventing it