/// <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);
});
}
/// <summary>
/// Starts observing display information for changes.
/// </summary>
/// <remarks>
/// Display events will be never invoked before calling this method.
/// </remarks>
public void StartListening()
{
Display.StateChanged +=
(s, e) =>
{
DisplayChanged?.Invoke(s, new DisplayStateEventArgs(EnumMapper.DisplayStateMapper(e.State)));
};
SystemSettings.ScreenBacklightTimeChanged +=
(s, e) =>
{
ScreenBacklightTimeChanged?.Invoke(s,
new SystemInfo.Model.Display.ScreenBacklightTimeChangedEventArgs(e.Value));
};
}
