private static void EventListenerStart()
{
s_handler = (int type, IntPtr value, IntPtr data) =>
{
int val = value.ToInt32();
DisplayStateChangedEventArgs e = new DisplayStateChangedEventArgs()
{
State = (DisplayState)val
};
s_stateChanged?.Invoke(null, e);
return(true);
};
Interop.Device.DeviceAddCallback(EventType.DisplayState, s_handler, IntPtr.Zero);
}
// Raised when the screen of the device is on/off/dim.
private void Display_StateChanged(object sender, TSystem.DisplayStateChangedEventArgs e)
{
Console.WriteLine("[Display_StateChanged] " + e.State);
// When device's screen turns on
if (e.State == TSystem.DisplayState.Normal)
{
// Update Time for UI update
WatchTime time = GetCurrentTime();
_viewModel.Time = time.UtcTimestamp + TimeSpan.FromMilliseconds(time.Millisecond);
// Update Information about Weather & Battery
_viewModel.UpdateInformation();
}
else if (e.State == TSystem.DisplayState.Off)
{
// When the screen of the device is off
_viewModel.UnregisterEvents();
}
}
