mouseDragged: on CGRect - cocoa

Question

I am trying to drag a CGRect, but nothing happens. The rect stays in the same place. Here is my mouseDragged: code:
-(void)mouseDragged:(NSEvent *)theEvent{
NSPoint eventLocation = [theEvent locationInWindow];
NSPoint location = [self convertPoint:eventLocation fromView:self];
int locationX = location.x;
int locationY = location.y;
[self setNeedsDisplay:TRUE];
if(CGRectContainsPoint(myRect, location)){
myRect.origin.x = locationX;
myRect.origin.y = locationY;
}
}
This code is inside of an NSView. I draw the rect myRect in drawRect:
Here is my drawRect:
- (void)drawRect:(NSRect)rect
{
int width = self.bounds.size.width;
int height = self.bounds.size.height;
myRect = CGRectMake((width/2)-50, (height /2)-50, 100, 100);
CGContextRef myContext = [[NSGraphicsContext currentContext] graphicsPort];
CGContextSetRGBFillColor(myContext, 1, 0, 0, 1);
CGContextFillRect(myContext, myRect);
NSLog(#"drawRect: called");
}
Any ideas?

Answer 1

You're always setting myRect to a constant value inside of drawRect:. It seems like what you want is to not set myRect at all in drawRect: and to draw it with its current value. So something like this:
- (void)drawRect:(NSRect)rect
{
CGContextRef myContext = [[NSGraphicsContext currentContext] graphicsPort];
CGContextSetRGBFillColor(myContext, 1, 0, 0, 1);
CGContextFillRect(myContext, myRect);
NSLog(#"drawRect: called");
}