transmission/macosx/InfoTabButtonCell.m

/******************************************************************************
 * $Id$
 *
 * Copyright (c) 2007 Transmission authors and contributors
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *****************************************************************************/

#import "InfoTabButtonCell.h"

@implementation InfoTabButtonCell

- (void) awakeFromNib
{
    NSNotificationCenter * nc = [NSNotificationCenter defaultCenter];
    [nc addObserver: self selector: @selector(updateControlTint:)
            name: NSControlTintDidChangeNotification object: nil];
    
    fSelected = NO;
}

- (void) dealloc
{
    [[NSNotificationCenter defaultCenter] removeObserver: self];
    
    [fIcon release];
    
    [fRegularImage release];
    [fSelectedImage release];
    [super dealloc];
}

- (void) setIcon: (NSImage *) image
{
    [fIcon release];
    fIcon = image ? [image retain] : nil;
    
    if (fRegularImage)
    {
        [fRegularImage release];
        fRegularImage = nil;
    }
    if (fSelectedImage)
    {
        [fSelectedImage release];
        fSelectedImage = nil;
    }
    
    [self setSelectedTab: fSelected];
}

- (void) setSelectedTab: (BOOL) selected
{
    fSelected = selected;
    
    NSImage * tabImage;
    BOOL createImage = NO;
    if (fSelected)
    {
        if (!fSelectedImage)
        {
            fSelectedImage = [NSColor currentControlTint] == NSGraphiteControlTint ? [[NSImage imageNamed: @"InfoTabBackBlue.tif"] copy]
                                : [[NSImage imageNamed: @"InfoTabBackBlue.tif"] copy];
            createImage = YES;
        }
        tabImage = fSelectedImage;
    }
    else
    {
        if (!fRegularImage)
        {
            fRegularImage = [[NSImage imageNamed: @"InfoTabBack.tif"] copy];
            createImage = YES;
        }
        tabImage = fRegularImage;
    }
    
    if (createImage)
    {
        if (fIcon)
        {
            NSSize iconSize = [fIcon size];
            NSRect imageRect = NSMakeRect(0, 0, [tabImage size].width, [tabImage size].height);
            NSRect rect = NSMakeRect(imageRect.origin.x + (imageRect.size.width - iconSize.width) * 0.5,
                            imageRect.origin.y + (imageRect.size.height - iconSize.height) * 0.5, iconSize.width, iconSize.height);

            [tabImage lockFocus];
            [fIcon drawInRect: rect fromRect: NSZeroRect operation: NSCompositeSourceOver fraction: 1.0];
            [tabImage unlockFocus];
        }
    }
    
    [self setImage: tabImage];
}

- (void) updateControlTint: (NSNotification *) notification
{
    if (fSelectedImage)
    {
        [fSelectedImage release];
        fSelectedImage = nil;
    }
    
    if (fSelected)
        [self setSelectedTab: YES];
}

@end