ATColorCell.m

/*
     File: ATColorCell.m
 Abstract: A simple cell that draws a color swatch next to the color's name.
 
  Version: 1.1
 
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 MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
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 */
 
#import "ATColorCell.h"
 
#define INSET_FROM_IMAGE_TO_TEXT 4.0
 
@implementation ATColorCell
 
- (id)init {
    self = [super init];
    [self setUsesSingleLineMode:YES];
    [self setLineBreakMode:NSLineBreakByTruncatingTail];
    return self;
}
 
- (id)copyWithZone:(NSZone *)zone {
    self = [super copyWithZone:zone];
    self->_color = [_color retain];
    return self;
}
 
- (void)dealloc {
    [_color release];
    [super dealloc];
}
 
@synthesize color = _color;
 
- (NSRect)colorRectForFrame:(NSRect)frame {
    NSRect result = frame;
    result.size.width = frame.size.height;
    return result;
}
 
- (NSRect)_titleFrameForInteriorFrame:(NSRect)frame {
    NSRect colorFrame = [self colorRectForFrame:frame];
    NSRect result = colorFrame;
    result.origin.x = NSMaxX(colorFrame) + INSET_FROM_IMAGE_TO_TEXT;
    // Go as wide as we can
    result.size.width = NSMaxX(frame) - NSMinX(result);
    // Center in the height
    // Move the title above the Y centerline of the image. 
    NSSize naturalSize = [super cellSize];
    result.origin.y = floor(NSMidY(frame) - naturalSize.height / 2.0);
    result.size.height = naturalSize.height;
    return result;
}
 
- (void)drawInteriorWithFrame:(NSRect)frame inView:(NSView *)controlView {
    if (_color) {
        [_color set];
        NSRect colorFrame = [self colorRectForFrame:frame];
        NSRectFill(colorFrame);
        [[NSColor lightGrayColor] set];
        NSFrameRectWithWidth(colorFrame, 1.0);
    }
    
    NSRect titleFrame = [self _titleFrameForInteriorFrame:frame];
    [super drawInteriorWithFrame:titleFrame inView:controlView];
}
 
- (NSUInteger)hitTestForEvent:(NSEvent *)event inRect:(NSRect)frame ofView:(NSView *)controlView {
    NSPoint point = [controlView convertPoint:[event locationInWindow] fromView:nil];
    NSRect colorRect = [self colorRectForFrame:frame];
    if (NSPointInRect(point, colorRect)) {
        // We combine in our own hit test marker
        return NSCellHitTrackableArea | ATCellHitTestColorRect;
    } else {
        NSUInteger result = [super hitTestForEvent:event inRect:[self _titleFrameForInteriorFrame:frame] ofView:controlView];
        // We don't want the label to be editable
        result = result & ~NSCellHitEditableTextArea;
        return result;
    }
    
}
 
 
@end