In my WPF app, when a ContextMenu
is opening, I want to tweak its menu items depending on whether or not the Alt
key is pressed.
I've got the logic working. XAML:
<my:Control ContextMenuOpening="MyContextMenu_Opening" />
Code:
private void MyContextMenu_Opening(object sender, RoutedEventArgs args) {
bool isAltDown = Keyboard.IsKeyDown(Key.LeftAlt);
/* tweak menu items here */
}
My problem is that when the Alt
key is pressed, the context menu opens and then immediately closes (I can see in the flash of it being open that my logic is at least working).
I wonder is this a WPF 'feature' in general because if I even hold Alt
while right clicking on a TextField
, the same thing happens - the built-in Cut/Copy/Paste menu flashes open then immediately closes.
One hunch is that it has something to do with Alt
activating the application menu bar. But an application menu bar does not apply to my situation, so if the solution involves messing with that, it will still work for me.