NSPopUpButtonCell within NSTextFieldCell: disappearing text

[Christiaan Hofman]

My guess is actually that you forgot to override selectWithFrame:...  
and editWithFrame:... This does everything you asked for:

@implementation MyPopUpTextFieldCell

- (id)initTextCell:(NSString *)aString {
     if (self = [super initTextCell:aString]) {
         popUpCell = [[NSPopUpButtonCell alloc] initTextCell:@""  
pullsDown:NO];
         [popUpCell setBordered:NO];
         [popUpCell addItemsWithTitles:[NSArray  
arrayWithObjects:@"One", @"Two", @"Three", nil]];
         [popUpCell selectItemAtIndex:0];
     }
     return self;
}

- (id)initWithCoder:(NSCoder *)decoder {
     if (self = [super initWithCoder:decoder]) {
         if (popUpCell == nil) {
             popUpCell = [[NSPopUpButtonCell alloc] initTextCell:@""  
pullsDown:NO];
             [popUpCell setBordered:NO];
             [popUpCell addItemsWithTitles:[NSArray  
arrayWithObjects:@"One", @"Two", @"Three", nil]];
             [popUpCell selectItemAtIndex:0];
         }
     }
     return self;
}

- (id)copyWithZone:(NSZone *)aZone {
     MyPopUpTextFieldCell *copy = [super copyWithZone:aZone];
     copy->popUpCell = [popUpCell copyWithZone:aZone];
     return copy;
}

- (void)dealloc {
     [popUpCell release];
     [super dealloc];
}

- (void)drawWithFrame:(NSRect)cellFrame inView:(NSView *)controlView {
     NSRect popUpRect, textRect;
     NSDivideRect(cellFrame, &popUpRect, &textRect, POPUP_WIDTH,  
NSMinXEdge);
     [super drawWithFrame:textRect inView:controlView];
     [popUpCell drawWithFrame:popUpRect inView:controlView];
}

- (void)selectWithFrame:(NSRect)aRect inView:(NSView *)controlView  
editor:(NSText *)textObj delegate:(id)anObject start:(int)selStart  
length:(int)selLength {
     NSRect popUpRect, textRect;
     NSDivideRect(aRect, &popUpRect, &textRect, POPUP_WIDTH,  
NSMinXEdge);
     [super selectWithFrame:textRect inView:controlView  
editor:textObj delegate:anObject start:selStart length:selLength];
}

- (void)editWithFrame:(NSRect)aRect inView:(NSView *)controlView  
editor:(NSText *)textObj delegate:(id)anObject event:(NSEvent *) 
theEvent {
     NSRect popUpRect, textRect;
     NSDivideRect(aRect, &popUpRect, &textRect, POPUP_WIDTH,  
NSMinXEdge);
     [super editWithFrame:textRect inView:controlView editor:textObj  
delegate:anObject event:theEvent];
}

- (BOOL)trackMouse:(NSEvent *)theEvent inRect:(NSRect)cellFrame  
ofView:(NSView *)controlView untilMouseUp:(BOOL)untilMouseUp {
     NSPoint point = [controlView convertPoint:[theEvent  
locationInWindow] fromView:nil];
     NSRect popUpRect, textRect;
     NSDivideRect(cellFrame, &popUpRect, &textRect, POPUP_WIDTH,  
NSMinXEdge);
     if (NSPointInRect(point, popUpRect))
        return [popUpCell trackMouse:theEvent inRect:popUpRect  
ofView:controlView untilMouseUp:untilMouseUp];
     return NO;
}

@end


Christiaan

On 6 Aug 2007, at 1:19 PM, Michael Dupuis wrote:

>
> --- Alan Smith <alanrogersmith at gmail.com> wrote:
>
>> I suggest not subclassing NSTextFieldCell but
>> NSCell. That way you
>> don't have to worry about overriding some of
>> NSTextFieldCell's
>> behavior. If you override NSCell just create a
>> NSTextFieldCell and
>> NSPopUpButtonCell as instance variables and draw
>> them in
>> drawWithFrame::
>
> Thanks Alan, that's pretty much what I wound up doing.
> I was hoping to use NSTextFieldCell to get a bunch of
> stuff "for free" but ultimately, it didn't work. I'd
> still be interested in the "why?" of it not working
> though.
>
> Michael
>
>
>
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