/// <summary>
/// Default class constructor.
/// </summary>
public Display()
{
_service = DependencyService.Get <IDisplay>();
_service.DisplayChanged += (s, e) => { DisplayStateChanged?.Invoke(s, e); };
_service.ScreenBacklightTimeChanged += (s, e) => { ScreenBacklightTimeChanged?.Invoke(s, e); };
_service.StartListening();
var oldBrightness = MainDisplayBrightness;
Device.StartTimer(TimeSpan.FromSeconds(3), () =>
{
var brightness = _service.MainDisplayBrightness;
if (oldBrightness == brightness)
{
return(true);
}
oldBrightness = brightness;
DisplayBrightnessChanged?.Invoke(this, new DisplayBrightnessEventArgs(brightness));
return(true);
});
}
public SystemEventManager()
{
SystemEvents.DisplaySettingsChanging += SystemEventsOnDisplaySettingsChanging;
SystemEvents.DisplaySettingsChanged += SystemEventsOnDisplaySettingsChanged;
_powerSettingEvents.AddIfNotNull(PowerSettingEvent.TryRegister(
Guid.Parse("6FE69556-704A-47A0-8F24-C28D936FDA47"),
() => DisplayStateChanged?.Invoke(this, EventArgs.Empty))
);
}
private void RegisterAllEvents()
{
// Display state changed
var powerSettingEvent = PowerSettingEvent.Register(
new Guid("6FE69556-704A-47A0-8F24-C28D936FDA47"),
() => DisplayStateChanged?.Invoke(this, EventArgs.Empty)
);
if (powerSettingEvent != null)
{
_powerSettingEvents.Add(powerSettingEvent);
}
else
{
Debug.WriteLine("Failed to register power setting event.");
}
}
