How to programmatically allocate a subclass of NSButton with a custom NSButtonCell? - objective-c

Question

I' m trying to create a subclass of NSButton thats use also a subclass of NSButtonCell but I can' t do that in code!
This is my NSButonCell subclass that's works well if I create the button in IB and set his cell class directly in IB:
#import "MyCustomCell.h"
#implementation MyCustomCell
- (void)drawImage:(NSImage*)image withFrame:(NSRect)frame inView:(NSView*)controlView
{
NSGraphicsContext *ctx = [NSGraphicsContext currentContext];
CGContextRef contextRef = [ctx graphicsPort];
NSData *data = [image TIFFRepresentation];
CGImageSourceRef source = CGImageSourceCreateWithData((CFDataRef)data, NULL);
if(source) {
CGImageRef imageRef = CGImageSourceCreateImageAtIndex(source, 0, NULL);
CFRelease(source);
CGContextSaveGState(contextRef);
{
NSRect rect = NSOffsetRect(frame, 0.0f, 1.0f);
CGFloat white = [self isHighlighted] ? 0.2f : 0.35f;
CGContextClipToMask(contextRef, NSRectToCGRect(rect), imageRef);
[[NSColor colorWithDeviceWhite:white alpha:1.0f] setFill];
NSRectFill(rect);
}
CGContextRestoreGState(contextRef);
CGContextSaveGState(contextRef);
{
NSRect rect = frame;
CGContextClipToMask(contextRef, NSRectToCGRect(rect), imageRef);
[[NSColor colorWithDeviceWhite:0.1f alpha:1.0f] setFill];
NSRectFill(rect);
}
CGContextRestoreGState(contextRef);
CFRelease(imageRef);
}
}
- (void)drawBezelWithFrame:(NSRect)frame inView:(NSView *)controlView
{
NSGraphicsContext *ctx = [NSGraphicsContext currentContext];
CGFloat roundedRadius = 3.0f;
BOOL outer = YES;
BOOL background = YES;
BOOL stroke = YES;
BOOL innerStroke = YES;
if(outer) {
[ctx saveGraphicsState];
NSBezierPath *outerClip = [NSBezierPath bezierPathWithRoundedRect:frame xRadius:roundedRadius yRadius:roundedRadius];
[outerClip setClip];
NSGradient *outerGradient = [[NSGradient alloc] initWithColorsAndLocations:
[NSColor colorWithDeviceWhite:0.20f alpha:1.0f], 0.0f,
[NSColor colorWithDeviceWhite:0.21f alpha:1.0f], 1.0f,
nil];
[outerGradient drawInRect:[outerClip bounds] angle:90.0f];
[outerGradient release];
[ctx restoreGraphicsState];
}
if(background) {
[ctx saveGraphicsState];
NSBezierPath *backgroundPath = [NSBezierPath bezierPathWithRoundedRect:NSInsetRect(frame, 2.0f, 2.0f) xRadius:roundedRadius yRadius:roundedRadius];
[backgroundPath setClip];
NSGradient *backgroundGradient = [[NSGradient alloc] initWithColorsAndLocations:
[NSColor colorWithDeviceWhite:0.17f alpha:1.0f], 0.0f,
[NSColor colorWithDeviceWhite:0.20f alpha:1.0f], 0.12f,
[NSColor colorWithDeviceWhite:0.27f alpha:1.0f], 0.5f,
[NSColor colorWithDeviceWhite:0.30f alpha:1.0f], 0.5f,
[NSColor colorWithDeviceWhite:0.42f alpha:1.0f], 0.98f,
[NSColor colorWithDeviceWhite:0.50f alpha:1.0f], 1.0f,
nil];
[backgroundGradient drawInRect:[backgroundPath bounds] angle:270.0f];
[backgroundGradient release];
[ctx restoreGraphicsState];
}
if(stroke) {
[ctx saveGraphicsState];
[[NSColor colorWithDeviceWhite:0.12f alpha:1.0f] setStroke];
[[NSBezierPath bezierPathWithRoundedRect:NSInsetRect(frame, 1.5f, 1.5f) xRadius:roundedRadius yRadius:roundedRadius] stroke];
[ctx restoreGraphicsState];
}
if(innerStroke) {
[ctx saveGraphicsState];
[[NSColor colorWithDeviceWhite:1.0f alpha:0.05f] setStroke];
[[NSBezierPath bezierPathWithRoundedRect:NSInsetRect(frame, 2.5f, 2.5f) xRadius:roundedRadius yRadius:roundedRadius] stroke];
[ctx restoreGraphicsState];
}
if([self isHighlighted]) {
[ctx saveGraphicsState];
[[NSBezierPath bezierPathWithRoundedRect:NSInsetRect(frame, 2.0f, 2.0f) xRadius:roundedRadius yRadius:roundedRadius] setClip];
[[NSColor colorWithCalibratedWhite:0.0f alpha:0.35] setFill];
NSRectFillUsingOperation(frame, NSCompositeSourceOver);
[ctx restoreGraphicsState];
}
}
#end
I also create a custom NSButton sublclass that use this NSButtonCell
#import "myButton.h"
#import "MyCustomCell.h"
#implementation myButton
- (id)initWithFrame:(NSRect)frame
{
self = [super initWithFrame:frame];
if (self)
{
[self setCell:[[MyCustomCell alloc] init]];
self.image = [NSImage imageNamed:#"add"];
}
return self;
}
#end
But when I create this button in my view the look of the button is the default one and not the customized style of the NSButtonCell subclass. If I set the cell in IB all work great but not in code. Anyone have an idea to solve that problem? Thanks!

Answer 1

I understand how to fix the problem.
It' s needed to set the bezel style on the button calling setBezelStyle. With this line of code all works great except for the fact that the image is upside-down.

Answer 2

Have you tried to use the cellClass class method?
+ (Class)cellClass {
return MyCustomCell.class;
}