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adium / Source / SetupWizardBackgroundView.m

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//
//  SetupWizardBackgroundView.m
//  Adium
//
//  Created by Evan Schoenberg on 12/4/05.
//  Copyright 2006 The Adium Team. All rights reserved.
//

#import "SetupWizardBackgroundView.h"
#import <AIUtilities/AIImageDrawingAdditions.h>

@implementation SetupWizardBackgroundView

- (id)initWithFrame:(NSRect)inFrame
{
        if ((self = [super initWithFrame:inFrame])) {
                transparentRect = NSZeroRect;
        }

        return self;
}

- (void)setBackgroundImage:(NSImage *)inImage
{
        if (backgroundImage != inImage) {
                [backgroundImage release];
                backgroundImage = [inImage retain];     
        }
        
        [self setNeedsDisplay:YES];
}

- (void) dealloc {
        [backgroundImage release]; backgroundImage = nil;
        [super dealloc];
}

- (void)setTransparentRect:(NSRect)inTransparentRect
{
        transparentRect = inTransparentRect;

        [self setNeedsDisplay:YES];
}

/*!
 * @brief Draw our background image
 *
 * The image is drawn faded behind our content view and solid elsewhere.
 *
 * Random Things I Remembered note: Unless you have a good reason, you always want to use -[NSBezierPath addClip], not -[NSBezierPath setClip],
 * so you take into account the existing clip rect.
 */
- (void)drawRect:(NSRect)rect {
        NSRect           imageDrawingRect = NSInsetRect([self bounds], 3, 0);

        if (backgroundImage && NSIntersectsRect(imageDrawingRect, rect)) {
                NSSize           imageSize = [backgroundImage size];
                NSBezierPath *path;

                //Clip to our content view and draw faded if we're supposed to draw in that area
                path = [NSBezierPath bezierPathWithRect:transparentRect];
                if (NSIntersectsRect(transparentRect, rect)) {
                        [NSGraphicsContext saveGraphicsState];
                        [path addClip];
                        
                        [backgroundImage drawInRect:imageDrawingRect
                                                                 atSize:imageSize
                                                           position:IMAGE_POSITION_LEFT
                                                           fraction:.30];
                        [NSGraphicsContext restoreGraphicsState];
                }               

                //Now clip to everywhere that isn't our content view and draw non-faded
                [path appendBezierPathWithRect:NSInsetRect([self bounds], -1, -1)];
                [path setWindingRule:NSEvenOddWindingRule];

                [NSGraphicsContext saveGraphicsState];
                [path addClip];
        
                [backgroundImage drawInRect:imageDrawingRect
                                                         atSize:imageSize
                                                   position:IMAGE_POSITION_LEFT
                                                   fraction:1.0];
                [NSGraphicsContext restoreGraphicsState];
        }
}

@end