hotkeys.m

- (void)registerIntervalHotKey {
    DDHotKeyCenter *startInterval = [[DDHotKeyCenter alloc] init];
    DDHotKeyCenter *stopInterval = [[DDHotKeyCenter alloc] init];
    DDHotKeyTask startIntervalTask = ^(NSEvent *hkEvent) {
        [Interval startInterval];
    };
    DDHotKeyTask stopIntervalTask = ^(NSEvent *hkEvent) {
        [Interval stopInterval];
    };
    
    if (![startInterval registerHotKeyWithKeyCode:21 modifierFlags:(NSControlKeyMask | NSCommandKeyMask) task:startIntervalTask]) {
        return;
    }
    if (![stopInterval registerHotKeyWithKeyCode:22 modifierFlags:(NSControlKeyMask | NSCommandKeyMask) task:stopIntervalTask]) {
        return;
    }
}