Retired Document
Important: This sample code may not represent best practices for current development. The project may use deprecated symbols and illustrate technologies and techniques that are no longer recommended.
ImageAndTextCell.m
/* |
File: ImageAndTextCell.m |
Abstract: |
Subclass of NSTextFieldCell which can display text and an image simultaneously. |
Version: <1.0> |
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install, modify or redistribute this Apple software. |
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"Apple Software"), to use, reproduce, modify and redistribute the Apple |
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text and disclaimers in all such redistributions of the Apple Software. |
Neither the name, trademarks, service marks or logos of Apple Computer, |
Inc. may be used to endorse or promote products derived from the Apple |
Software without specific prior written permission from Apple. Except |
as expressly stated in this notice, no other rights or licenses, express |
or implied, are granted by Apple herein, including but not limited to |
any patent rights that may be infringed by your derivative works or by |
other works in which the Apple Software may be incorporated. |
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MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION |
THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS |
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Copyright © 2005 Apple Computer, Inc., All Rights Reserved |
*/ |
#import "ImageAndTextCell.h" |
@implementation ImageAndTextCell |
- (void)dealloc { |
[image release]; |
image = nil; |
[super dealloc]; |
} |
// Returns a new instance thatÕs a copy of the receiver. |
// Memory for the new instance is allocated from zone, which may be nil. |
- copyWithZone:(NSZone *)zone { |
ImageAndTextCell *cell = (ImageAndTextCell *)[super copyWithZone:zone]; |
cell->image = [image retain]; |
return cell; |
} |
// image setter |
- (void)setImage:(NSImage *)anImage { |
if (anImage != image) { |
[image release]; |
image = [anImage retain]; |
} |
} |
// getter |
- (NSImage *)image { |
return image; |
} |
// return a rect corresponding to the image cell frame |
- (NSRect)imageFrameForCellFrame:(NSRect)cellFrame { |
if (image != nil) { |
NSRect imageFrame; |
imageFrame.size = [image size]; |
imageFrame.origin = cellFrame.origin; |
imageFrame.origin.x += 3; |
imageFrame.origin.y += ceil((cellFrame.size.height - imageFrame.size.height) / 2); |
return imageFrame; |
} |
else |
return NSZeroRect; |
} |
// edit the cell |
- (void)editWithFrame:(NSRect)aRect inView:(NSView *)controlView editor:(NSText *)textObj delegate:(id)anObject event:(NSEvent *)theEvent { |
NSRect textFrame, imageFrame; |
NSDivideRect (aRect, &imageFrame, &textFrame, 3 + [image size].width, NSMinXEdge); |
[super editWithFrame: textFrame inView: controlView editor:textObj delegate:anObject event: theEvent]; |
} |
// select the edit cell frame |
- (void)selectWithFrame:(NSRect)aRect inView:(NSView *)controlView editor:(NSText *)textObj delegate:(id)anObject start:(int)selStart length:(int)selLength { |
NSRect textFrame, imageFrame; |
NSDivideRect (aRect, &imageFrame, &textFrame, 3 + [image size].width, NSMinXEdge); |
[super selectWithFrame: textFrame inView: controlView editor:textObj delegate:anObject start:selStart length:selLength]; |
} |
// draw the edit cell |
- (void)drawWithFrame:(NSRect)cellFrame inView:(NSView *)controlView { |
if (image != nil) { |
NSSize imageSize; |
NSRect imageFrame; |
imageSize = [image size]; |
NSDivideRect(cellFrame, &imageFrame, &cellFrame, 3 + imageSize.width, NSMinXEdge); |
if ([self drawsBackground]) { |
[[self backgroundColor] set]; |
NSRectFill(imageFrame); |
} |
imageFrame.origin.x += 3; |
imageFrame.size = imageSize; |
if ([controlView isFlipped]) |
imageFrame.origin.y += ceil((cellFrame.size.height + imageFrame.size.height) / 2); |
else |
imageFrame.origin.y += ceil((cellFrame.size.height - imageFrame.size.height) / 2); |
[image compositeToPoint:imageFrame.origin operation:NSCompositeSourceOver]; |
} |
[super drawWithFrame:cellFrame inView:controlView]; |
} |
- (NSSize)cellSize { |
NSSize cellSize = [super cellSize]; |
cellSize.width += (image ? [image size].width : 0) + 3; |
return cellSize; |
} |
@end |
Copyright © 2006 Apple Computer, Inc. All Rights Reserved. Terms of Use | Privacy Policy | Updated: 2006-01-03