NSTextField - Subclassing & drawRect cause text not to load

Question

Trying to round out the border of an NSTextField (the little black box in the upper-left corner): http://cl.ly/image/2V2L1u3b3u0G

So I subclassed NSTextField:

MYTextField.h

#import <Cocoa/Cocoa.h> @interface HATrackCounterField : NSTextField @end

MYTextField.m

#import "HATrackCounterField.h" @implementation HATrackCounterField - (id)initWithFrame:(NSRect)frame { self = [super initWithFrame:frame]; if (self) {} return self; } - (void)drawRect:(NSRect)dirtyRect { [[NSColor blackColor] setFill]; [[NSBezierPath bezierPathWithRoundedRect:dirtyRect xRadius:3.0 yRadius:3.0] fill]; } @end

Now its not showing the text-field text: http://cl.ly/image/1J2W3K431C04

I'm new at objective-c, it seems like this should be easy, so I'm probably just doing something wrong...

Thanks!

Note: I'm setting the text through a collection view, and I've tried setStringValue: at different points also to no avail.

Dmitry · Accepted Answer · 2012-08-06 08:28:25Z

Your text-field's text isn't showing because you overwrite -drawRect and don't call [super drawRect:dirtyRect] in it.

In your case, I think the easiest way to do what you want is using clip mask: just let NSTextField perform drawing ant then clip the region:

- (void)drawRect:(NSRect)dirtyRect { [NSGraphicsContext saveGraphicsState]; [[NSBezierPath bezierPathWithRoundedRect:dirtyRect xRadius:3.0 yRadius:3.0] setClip]; [super drawRect:dirtyRect]; [NSGraphicsContext restoreGraphicsState]; }

In general it is better to subclass NSTextFieldCell instead to make custom drawing, because cells are responsible for drawing.

Yes, but you should overwrite -drawWithFrame:inView: of NSCell instead of -drawRect:.

Vervious · Accepted Answer · 2012-08-06 17:35:14Z

For reference for future readers, this is probably how you should do it, by subclassing NSTextFieldCell:

- (void)drawWithFrame:(NSRect)cellFrame inView:(NSView *)controlView { NSBezierPath *betterBounds = [NSBezierPath bezierPathWithRoundedRect:cellFrame xRadius:CORNER_RADIUS yRadius:CORNER_RADIUS]; [betterBounds addClip]; [super drawWithFrame:cellFrame inView:controlView]; if (self.isBezeled) { // optional, but provides an example of drawing a prettier border [betterBounds setLineWidth:2]; [[NSColor colorWithCalibratedRed:0.510 green:0.643 blue:0.804 alpha:1] setStroke]; [betterBounds stroke]; } }

I draw an additional bluish border here (though that seems to be unnecessary for your black box)

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