cpp-danmaku/danmaku/AppDelegate.m

//
//  AppDelegate.m
//  danmaku
//
//  Created by Sam Jaffe on 5/24/19.
//  Copyright © 2019 Sam Jaffe. All rights reserved.
//

#import "AppDelegate.h"

@implementation AppDelegate

@synthesize gameview;

NSWindowStyleMask const resizable = NSWindowStyleMaskResizable;
NSWindowStyleMask const borderless = NSWindowStyleMaskBorderless;

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
  gameview = [[GameView alloc] initWithFrame:[[self window] frame]];
  
  // Insert code here to initialize your application
  [[self window] setStyleMask:[[self window] styleMask] & ~resizable];
  [[self window] setDelegate:[self gameview]];
  [[self window] makeMainWindow];
}

- (BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)app {
  return YES;
}

@end

@implementation GameWindow

- (id)initWithContentRect:(NSRect)contentRect
                styleMask:(NSWindowStyleMask)aStyle
                  backing:(NSBackingStoreType)bufferingType
                    defer:(BOOL)flag {
  
  // Using NSBorderlessWindowMask results in a window without a title bar.
  self = [super initWithContentRect:contentRect
                          styleMask:(aStyle | borderless) & ~resizable
                            backing:NSBackingStoreBuffered
                              defer:NO];
  return self;
}

- (BOOL)canBecomeMainWindow {
  return YES;
}

- (BOOL)canBecomeKeyWindow {
  return YES;
}

@end