protected override LResult WindowProcedure(WindowHandle window, MessageType message, WParam wParam, LParam lParam)
{
switch (message)
{
case MessageType.Create:
dcScreen = Gdi.CreateDeviceContext("DISPLAY", null);
window.SetTimer(ID_TIMER, 100);
return(0);
case MessageType.Timer:
Point pt = Windows.GetCursorPosition();
cr = dcScreen.GetPixel(pt);
// Not sure why the sample did this
// dcScreen.SetPixel(pt, 0);
if (cr != crLast)
{
crLast = cr;
window.GetDeviceContext().SetBackgroundColor(cr);
window.Invalidate(erase: false);
}
return(0);
case MessageType.Paint:
using (DeviceContext dc = window.BeginPaint())
{
dc.SelectObject(StockFont.SystemFixed);
Rectangle rc = window.GetClientRectangle();
dc.FillRectangle(rc, dc.GetCurrentBrush());
dc.DrawText($"0x{cr.R:X2} 0x{cr.G:X2} 0x{cr.B:X2}".AsSpan(), rc,
TextFormat.SingleLine | TextFormat.Center | TextFormat.VerticallyCenter);
}
return(0);
case MessageType.Destroy:
dcScreen.Dispose();
window.KillTimer(ID_TIMER);
break;
}
return(base.WindowProcedure(window, message, wParam, lParam));
}