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    <p>I did this in a previous project by using a matrix of custom <code>buttonCells</code>. I added a <code>backgroundColor</code> property to the button cell, so I could get a colored background on a cell with no border (which isn't possible with the standard cell types). Here is the subclass of <code>NSButtonCell</code> that I made:</p> <pre><code>@interface RDButtonCell : NSButtonCell &lt;NSCoding&gt; @property (retain) NSColor *selectedColor; @property (retain) NSColor *backgroundColor; -(id)initWithRGBAlpha:(NSArray *)rgbAlpha; @implementation RDButtonCell -(id)initWithRGBAlpha:(NSArray *)rgbAlpha { if (self = [super init]) { NSColor *color = [NSColor colorWithCalibratedRed:[rgbAlpha[0]doubleValue] green:[rgbAlpha[1]doubleValue] blue:[rgbAlpha[2]doubleValue] alpha:[rgbAlpha[3]doubleValue]]; [self setBackgroundColor:color]; [self setTitle:@""]; [self setBordered:NO]; [self setTag:0]; } return self; } -(void) setState:(NSInteger)value { if (value == 1) { self.backgroundColor = self.selectedColor; [super setState:value]; }else { self.backgroundColor = self.backgroundColor; [super setState:value]; } } -(void) setBackgroundColor:(NSColor *)color { _backgroundColor = color; _selectedColor = [color colorWithAlphaComponent:.75]; } - (void)encodeWithCoder:(NSCoder *)encoder { [super encodeWithCoder:encoder]; [encoder encodeObject:_backgroundColor forKey:@"bColor"]; } - (id)initWithCoder:(NSCoder *)decoder { self = [super initWithCoder:decoder]; _backgroundColor = [decoder decodeObjectForKey:@"bColor"]; return self; } </code></pre>
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