Prevent a QMenu from closing when one of its QAction is triggered

Question

Hi,

I'm using a QMenu as context menu. This menu is filled with QActions. One of these QActions is checkable, and I'd like to be able to check/uncheck it without closing the context menu (and having to re-open it again to choose the option that I want).

I've tried disconnecting the signals emitted by the checkable QAction with no luck.

Any ideas? Thanks.

Answer 1

Hey,

Here are couple ideas I've had... Not sure at all they will work tho ;)

1) Try to catch the Event by using the QMenu's method aboutToHide(); Maybe you can "Cancel" the hide process ?

2) Maybe you could consider using an EventFilter ?

Try to have a look at : http://qt.nokia.com/doc/4.6/qobject.html#installEventFilter

3) Otherwise you could reimplement QMenu to add your own behavior, but it seems a lot of work to me...

Hope this helps a bit !

Answer 2

Use a QWidgetAction and QCheckBox for a "checkable action" which doesn't cause the menu to close.

QCheckBox *checkBox = new QCheckBox(menu);
QWidgetAction *checkableAction = new QWidgetAction(menu);
checkableAction->setDefaultWidget(checkBox);
menu->addAction(checkableAction);

In some styles, this won't appear exactly the same as a checkable action. For example, for the Plastique style, the check box needs to be indented a bit.

Answer 3

I have the same probleme, i tried to do my Qmenu with QWidgetAction and Checkbox, but when I set the defaultWidget of my QWidgetAction the text in the menu isn't show, but the checkbow is show ....