Re: NSTabView and edit fields

FROM : John Stiles
DATE : Tue Aug 01 19:09:30 2006

I will experiment some more with 
performSelector:withObject:afterDelay:, then.
Do you think this merits a radar? I can see how Cocoa gets into this 
botched up state, but I think the text field control ought to be 
smart enough to realize that it doesn't deserve a halo if it doesn't 
really have focus.


On Aug 1, 2006, at 9:38 AM, Matt Neuburg wrote:

> On Tue, 01 Aug 2006 08:30:40 -0700, John Stiles 
> <<email_removed>> said:
>

>> I don't think it's apparent that a control in the window /must/ have
>> focus. The window itself, or the window frame container, can have the
>> focus. That's perfectly legitimate AFAICS. And I certainly don't 
>> think
>> the impetus is on the developer to force focus on a control in a 
>> window
>> whenever you show a window or sheet---this certainly isn't a common
>> Cocoa programming technique.

>
> Well, try it with a window containing nothing but an NSTextField 
> (not in a
> tab view). When the app starts up and the window appears, the text 
> field has
> focus. So exactly the same thing should happen even when the 
> NSTextField
> *is* in a tab view.
>
> In any case, the problem you are having is merely a variety of a 
> very old
> problem. You are hitting Return in the text field as a way 
> triggering the
> default button. When Cocoa finishes triggering the default button, 
> though,
> it puts the focus back where it was. Since you are changing the 
> focus inside
> the button's action method, Cocoa puts the focus back where it was 
> *after*
> the button's action method has finished. Delayed performance solves 
> the
> problem, one way or another. This has been dealt with many times 
> here, so
> check the archives. The solution I provided years go, though rather 
> naively
> written (I was young and foolish in those days, and didn't really 
> know what
> a selector was), still works - and it works in the case of your 
> example,
> which is the important thing.
>
> <http://www.cocoabuilder.com/archive/message/cocoa/2002/9/16/70936>
>
> So:
>
> - (IBAction)goToSecondTab:(id)sender
> {
>  [myTextField setStringValue:@""];
>  [myTabView selectTabViewItemAtIndex:1];
> }
>
> - (BOOL)control:(NSControl *)control
>      textView:(NSTextView *)textView doCommandBySelector:(SEL)
> command {
>  if (command == @selector(insertNewline:)) {
>    if ([[control window] makeFirstResponder: [control window]]) {
>        [[[control window] defaultButtonCell]
>            performSelector:@selector(performClick:)
>                  withObject: nil
>                  afterDelay: 0.05];
>    }
>    return YES;
>  }
>  return NO;
> }
>
> m.
>
> --
> matt neuburg, phd = <email_removed>, <http://www.tidbits.com/matt/>
> A fool + a tool + an autorelease pool = cool!
> AppleScript: the Definitive Guide - Second Edition!
> <http://www.amazon.com/gp/product/0596102119>
>
>
>