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Re: Cocoa bug? Arrow keys stop working in table view
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Re: Cocoa bug? Arrow keys stop working in table view


  • Subject: Re: Cocoa bug? Arrow keys stop working in table view
  • From: Andrew Merenbach <email@hidden>
  • Date: Fri, 28 Jul 2006 20:54:07 -0700

Thanks for the tip, Corbin, but I'm still a little confused. Why does my custom table view support arrow-key navigation when it is *not* inside of a tab view? Making it a subview of a split view or basic custom view doesn't disable the arrow keys; why should putting it inside a tab view (using the "Make subviews of" menu in IB) make any difference at all as to whether super's keyDown: is being called?

Cheers,
	Andrew

On Jul 28, 2006, at 6:03 PM, Corbin Dunn wrote:


On Jul 28, 2006, at 5:38 PM, Andrew Merenbach wrote:

Hi, all. I wonder whether I've found a possible bug with the Cocoa GUI system. I have an NSTableView that I subclassed for delete-key and escape-key support, amongst other things. For some reason after I put the table view inside of a tab view (as the only child view of the first tab view item, I might add) the default (untouched!) arrow-key support stops working.

My key-handling code is as follows:

- (void)keyDown:(NSEvent *)event {
    consumedKeyDown = NO;
    [self interpretKeyEvents:[NSArray arrayWithObject:event]];
    if (!consumedKeyDown) [super keyDown:event];
}

- (void)doCommandBySelector:(SEL)selector {
    consumedKeyDown = [self tryToPerform:selector with:nil];
}

(Where consumedKeyDown is a BOOL instance variable set to NO in - awakeFromNib.)

Switching the table's class back to a regular table view solves the problem, as does commenting out the one line in - doCommandBySelector:

I haven't been able to find anything in the docs or in the archives to explain the lack of arrow key functionality that I'm experiencing. Does anyone have any pointers? Is the tab view interfering with the arrow keys somehow?


The keyboard nav for tableviews is handled in [super keyDown:]. Chances are, you aren't calling it. You may want to special case those keys to let them through.


-corbin

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References: 
 >Cocoa bug? Arrow keys stop working in table view (From: Andrew Merenbach <email@hidden>)
 >Re: Cocoa bug? Arrow keys stop working in table view (From: Corbin Dunn <email@hidden>)

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