amra@cis.ohio-state.edu (Nasir K Amra) (07/03/89)
Can I simply say:
[panel_outlet display];
in the method of the object that is supposed to respond to a
button click with displaying a panel that was previously hidden. Or,
do I have to do some more preparations. All view objects in my program
was created by IB and I've hooked up the proper target/action &
outlet/panel connections, but I get an warning message with the following
method:
- displayresultpanel: sender
{ [ resultpanel display];
return self;
}
where the warning message states that ' can not find method' ( I assume
display) and another warning message : 'return type for display defaults to
id'
When I run the compiled program, clicking on the button does
not bring up the panel.
Any help would be greatly appreciated.
== Nasirali@polya.Stanford.EDU (Ali T. Ozer) (07/05/89)
In article <53602@tut.cis.ohio-state.edu> Nasir K Amra writes: > ... I get an warning message with the following method: > >- displayresultpanel: sender >{ [ resultpanel display]; > return self; >} > >where the warning message states that ' can not find method' ( I assume >display) and another warning message : 'return type for display defaults to >id' You should "#import" the interface for any class referenced/used in a file. In the above example you say the "resultpanel" instance variable is a object of class Panel; in that case, you should have a #import <appkit/Panel.h> at the top of the above .m file. This will assure that all Panel methods are known to the compiler, and if you get any warnings, you are indeed calling a method that doesn't exist. The method that makes panels and windows to come on-screen is orderFront:, not display. The display method causes a redraw of the whole panel, including the border view and the content view, and all subviews. orderFront: simply brings the panel on screen. Because orderFront: is a target-action method, you can usually connect a button or menu item to a panel or window without having to create a glue method; in the above case you wouldn't need the displayresultpanel: method, for instance. Ali Ozer, NeXT Developer Support aozer@NeXT.com
amra@python.cis.ohio-state.edu (Nasir K Amra) (07/05/89)
AHHHH, I see now what I did wrong. You have certainly clarified a lot for me. However, since I want to record that the button was clicked in a log file that records such events, it seems to me I can't go directly from the clicked button to the panel, but must interject an intermediate object for that extra processing. Do you know of any other way I could do it? Thanks a lot, Nasir Amra -=- Nasir K. Amra amra@cis.ohio-state.edu