Objective-c – NSColor with calibrated values works differently than regular color

You said your init method was:

-(void)init {
[super init];
//set default color = black
toolColor.rd=1.0;
toolColor.grn=1.0;
toolColor.blu=1.0;
toolColor.alp=1.0;
//set default size
toolSize=0.8;
//set default toolType
toolType=0;
//oval
NSLog(@"Init %@",self);
}

This is definitely wrong; read up on how to create an init method in the Obj-C guide or by reading sample code. Here's what it should look like:

-(id)init {
if (self = [super init]) {
    //set default color = black
    toolColor.rd=1.0;
    toolColor.grn=1.0;
    toolColor.blu=1.0;
    toolColor.alp=1.0;
    //set default size
    toolSize=0.8;
    //set default toolType
    toolType=0;
    //oval
    NSLog(@"Init %@",self);
}
return self;
}

By not returning anything from -init, you were preventing the object's creation. Good luck! :-)

Edit: Ashley beat me to it...

The code works for me. Try debugging, did you remember to call -set on your color after creating it? Here is some example code that works:

static NSColor *colorFromRGB(unsigned char r, unsigned char g, unsigned char b)
{
    return [NSColor colorWithCalibratedRed:(r/255.0f) green:(g/255.0f) blue:(b/255.0f) alpha:1.0];
}

...

- (void)drawRect:(NSRect)rect {
    NSColor *c = colorFromRGB(50, 100, 255);
    [c set]; // <-- Important
    NSRectFill(rect);
}