public static void CalibrateTouchscreen(NwazetGoImaging.VirtualCanvas canvas)
{
try
{
var sd = new NwazetGoSD.SDCardReader();
sd.Initialize(GoSockets.Socket8);
var calibrationDataFilename = @"SD\TouchscreenCalibration.bin";
// If the touchscreen calibration data was previously retrieved from the display module and was stored to an SD card,
// the calibration data can be sent to the display module instead of calling TouchscreenCalibration() before using
// the touchscreen for the first time.
if (File.Exists(calibrationDataFilename))
{
using (var calibrationDataFile = new FileStream(calibrationDataFilename, FileMode.Open))
{
var context = new NwazetGoHelpers.BasicTypeDeSerializerContext(calibrationDataFile);
var matrix = new NwazetGoDisplayTouchScreen.CalibrationMatrix();
matrix.Get(context);
canvas.SetTouchscreenCalibrationMatrix(matrix);
}
}
else
{
// No pre-existing calibration data, create it...
using (var calibrationDataFile = new FileStream(calibrationDataFilename, FileMode.Create))
{
var matrix = canvas.GetTouchscreenCalibrationMatrix();
var context = new NwazetGoHelpers.BasicTypeSerializerContext(calibrationDataFile);
matrix.Put(context);
}
}
sd.Dispose();
}
catch (Exception)
{
Debug.Print("SD Card or file I/O error: manual calibration required.");
canvas.TouchscreenCalibration();
}
}
