How can you use an image as a background for a text box in Cocoa?

Question

Can I use an image as a background for a text box in Cocoa? If so, how?

Answer 1

I don't know if this is the “right” way to do it, but the first thing that comes to mind is to create a custom subclass of NSTextField that might look something like this:

- (void)awakeFromNib
{
    [self setDrawsBackground:NO];
}

- (void)drawRect:(NSRect)rect
{
    [super drawRect:rect];

    [self lockFocus];
    [[NSImage imageNamed:@"<#image filename#>"] drawInRect:rect
        fromRect:rect
        operation:NSCompositeSourceOver
        fraction:1.0];
    [self unlockFocus];
}

Again, this is just a rough outline of the main parts.

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NSTextField Objective-C (File → New File...), , NSTextField NSObject, , :

#import <Cocoa/Cocoa.h>

@interface BGImageTextField : NSTextField
{
}

@end

, (, BGImageTextField.m), @implementation @end.

. -, Cocoa Programming for Mac OS X Aaron Hillegass - Cocoa, , Cocoa . -, , , , , , , , , NSTextField.

Answer 2

NSTextField [NSColor clearColor] .