Remove item from QListWidget by dropping it outside the widget?

Question

I have searched the web for possibilities to realize this but haven't found a solution. Is there a simple way of removing an item from the list that is dropped on a non-receiving area or even outside the application's window?

So far I accept the delete key for removing items by means of a shortcut:

QShortcut *shortcut = new QShortcut(QKeySequence(Qt::Key_Delete), myList); shortcut->setContext(Qt::WidgetShortcut); connect(shortcut, SIGNAL(activated()), this, SLOT(deleteSelection()));

But since I add items to the list via drag and drop, I would like to be able to remove them in the same way, too. The items in the list can also be ordered via drag and drop.

Any hints or links are appreciated.

@KamilKlimek So you think I would have to subclass the widget to be able to do that? Is there no other way? I would have thought that was a pretty standard thing to want from a QListWidget. — steps
– steps, Commented Feb 20, 2012 at 21:18

swongu · Accepted Answer · 2012-02-29 21:58:51Z

1

This seems to work for me:

The drag-and-drop action should be Qt::MoveAction
Ensure the parent of the QListWidget (e.g., QDialog) has the following:
- dragEnterEvent() implemented
- dropEvent() implemented (ignore the mime data here)
- setAcceptDrops(true);

Ignoring the mime data in dropEvent() in a Qt::MoveAction should be equivalent to a item remove operation.

Good luck!

answered Feb 29, 2012 at 21:58

swongu

2,2993 gold badges19 silver badges24 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

steps Over a year ago

In the Qt Designer, I set all properties to what you suggested and installed an event filter on the list widget, as Kamil said, to catch the dragEnter/dragLeave/dropEvents but the occasions on which an event is fired or not seem almost random to me. The dragLeaveEvent for example doesn't even seem to get fired at all. The event filter approach makes sense to me and the events being fired or not seems a very Qt specific issue, so I posted a more detailed question here, in case you're interested. Thanks for your help!

Collectives™ on Stack Overflow

Remove item from QListWidget by dropping it outside the widget?

1 Answer 1

1 Comment

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Related