1 /*

     2  * Copyright (C) 2005 Apple Computer, Inc.  All rights reserved.

     3  *

     4  * Redistribution and use in source and binary forms, with or without

     5  * modification, are permitted provided that the following conditions

     6  * are met:

     7  * 1. Redistributions of source code must retain the above copyright

     8  *    notice, this list of conditions and the following disclaimer.

     9  * 2. Redistributions in binary form must reproduce the above copyright

    10  *    notice, this list of conditions and the following disclaimer in the

    11  *    documentation and/or other materials provided with the distribution.

    12  *

    13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY

    14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

    16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR

    17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

    18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

    19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

    20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

    21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

    22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

    23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

    24  */

    25 

    26 

    27 #import "ScalingImageView.h"

    28 

    29 @implementation ScalingImageView

    30 

    31 /*

    32  This class offers two behaviors different from the standard NSImageView

    33  (and which were not available w/o subclassing)

    34  1.  Scale an image proportionally up to fit a larger view (NSImageView refuses)

    35  2.  Draw a background color w/o needing to show a bezel.

    36 */

    37 

    38 - (void)drawRect:(NSRect)dirtyRect

    39 {

    40     [[NSColor whiteColor] set];

    41     NSRectFill(dirtyRect);

    42     

    43     NSSize imageSize = [[self image] size];

    44     float scale = 1.0f;

    45     if ([self imageScaling] == NSScaleProportionally && imageSize.width && imageSize.height) {

    46         float widthScale = [self bounds].size.width / imageSize.width;

    47         float heightScale = [self bounds].size.height / imageSize.height;

    48         scale = MIN(widthScale, heightScale);

    49     }

    50 

    51     float scaledHeight = imageSize.height * scale;

    52     NSRect destRect = NSMakeRect(0,[self bounds].size.height - scaledHeight,imageSize.width * scale, scaledHeight);

    53     [[self image] drawInRect:destRect

    54         fromRect:NSMakeRect(0,0,imageSize.width, imageSize.height) operation:NSCompositeSourceOver fraction:1.0];

    55 }

    56 

    57 @end