gistfile1.txt

//
//  ViewController.m
//  MouseDownTest
//
//  Created by Chris Hamons on 12/4/14.
//  Copyright (c) 2014 Chris Hamons. All rights reserved.
//

#import "ViewController.h"

@interface MyView : NSView


@end

@implementation MyView

- (void) mouseDown:(NSEvent *)theEvent {
    NSLog (@"Down");
    [super mouseDown:theEvent];
}

- (void) drawRect:(NSRect)dirtyRect {
    CGContextRef context = [[NSGraphicsContext currentContext] graphicsPort];
    CGContextSetRGBFillColor (context, 1, 0, 0, 1);
    CGContextFillRect(context, dirtyRect);
}

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    MyView * view = [MyView new];
    view.frame = CGRectMake(10, 10, 100, 100);
    [[self view] addSubview:view];
    
    // Do any additional setup after loading the view.
}

- (void)setRepresentedObject:(id)representedObject {
    [super setRepresentedObject:representedObject];

    // Update the view, if already loaded.
}

@end