/// <summary>
/// Sets the console for Interactive display. Uses GSDisplay Class to handle display events
/// UTF8 is setup for encoding. Callback handlers for StdIO are also set by calling base functions
/// </summary>
/// <returns>True if successful</returns>
protected bool SetConsole()
{
_pInstance = IntPtr.Zero;
IntPtr displayDevice_callback_handle;
_gsDisplay = new GSDisplay();
string[] strArray = GetArgsForDisplay();
// allocate a memory for the display device callback handler
displayDevice_callback_handle = Marshal.AllocCoTaskMem(_gsDisplay._callback.size);
// copy display device callback structure content to the pre-allocated block of memory
Marshal.StructureToPtr(_gsDisplay._callback, displayDevice_callback_handle, true);
_errNo = gsNewInstance(out _pInstance, IntPtr.Zero);
if (_errNo != 0)
{
return(false);
}
else
{
try
{
_errNo = gsSetArgEncoding(_pInstance, GS_ARG_ENCODING.UTF8);
if (_errNo < 0)
{
return(false);
}
_errNo = gsSetDisplayCallback(_pInstance, displayDevice_callback_handle);
if (_errNo < 0)
{
return(false);
}
_errNo = gsInitArgs(_pInstance, strArray.Length, strArray);
if (_errNo != 0)
{
return(false);
}
_errNo = gsSetStdio(_pInstance, StdIOIn, StdIOOut, StdIOErr);
if (_errNo != 0)
{
return(false);
}
}
catch (Exception)
{
_pInstance = IntPtr.Zero;
return(false);
}
}
return(true);
}
/// <summary>
/// Delete the stored Instance handler and make Display class null
/// </summary>
private void CleanUp()
{
if (_pInstance != IntPtr.Zero)
{
gsExit(_pInstance);
gsDeleteInstance(_pInstance);
}
if (_gsDisplay != null)
{
_gsDisplay = null;
}
}