public MainViewModel(IMonitorService monitorService, IHotKeyService hotKeyService, ISettingsProvider settingsProvider,
IStartupService startupService, IDialogService dialogService)
{
var monitors = monitorService.GetPhysicalMonitors();
Monitor = new MonitorViewModel(monitors.First(), monitorService);
Monitor.BrightnessChanged += OnBrightnessChanged;
Settings = new SettingsViewModel(settingsProvider, dialogService);
Settings.SettingsChanged += OnSettingsChanged;
MouseWheelCommand = new RelayCommand <MouseWheelEventArgs>(OnMouseWheelScroll);
ShowWindowCommand = new RelayCommand(ShowWindow);
ExitApplicationCommand = new RelayCommand(ExitApplication);
IncreaseBrightnessCommand = new RelayCommand(IncreaseBrightness);
DecreaseBrightnessCommand = new RelayCommand(DecreaseBrightness);
_settingsProvider = settingsProvider;
_startupService = startupService;
_startupService.RunAppOnStartup(Settings.RunOnStartUp);
_hotKeyManager = new HotKeyManagerViewModel(hotKeyService, this);
_dialogService = dialogService;
}