In my app's main window, I have a button which should kill a process
from the running system processes. (Guess what - it is helpd.)
In -awakeFromNib:, a private app delegate method -checkHelpd: checks if
some other app has already launched helpd. If so, the button will be
drawn as enabled, else disabled.
When I press the button, another private method -killHelpd: definitely
kills the process, then -checkHelpd: is used again to check whether the
button's state should be disabled or enabled. This triggers a redraw of
the window - or at least should do. But the button is not redrawn (with
its new state) until I toggle the active app from my app to say Xcode
and back to my app.
This is the method in my AppDelegate.m which should update the button:
- (void)updateKillHelpdButton
{
[killHelpdButton setEnabled:[self checkHelpd]];
[killHelpdButton setNeedsDisplay:YES];
}
Can someone please tell me what else I should do to force the redraw?
Thank you in advance,
---Ulf Dunkel
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