/**
* Register the callback type selected by the user.
*
* @param acq Reference to an acquisition interface.
* @param callbackType Selected callback to be registered.
* @param userContext Object to be used at the other side of the callback.
* @return If the registration was sucessfull.
*/
static bool registerCallbackType(ref HFramegrabber acq, HTuple callbackType,
object userContext)
{
IntPtr contextPtr, funcPtr;
funcPtr = Marshal.GetFunctionPointerForDelegate(gDelegateCallback);
contextPtr = Marshal.AllocHGlobal(Marshal.SizeOf(userContext));
Marshal.StructureToPtr(userContext, contextPtr, false);
try
{
// If the user context is not needed, IntPtr.Zero can be passed.
acq.SetFramegrabberCallback(callbackType.S.ToString(), funcPtr,
contextPtr);
}
catch (HalconException exc)
{
Console.WriteLine(System.Environment.NewLine + "Callback " +
callbackType.S.ToString() + " registration failed!");
Console.WriteLine(exc.GetErrorMessage());
return(false);
}
return(true);
}
/**
* Clean up an exit the program.
*
* @param acq Acquisition handle.
* @param callbackTpye Registered callback.
* @param waiting Activate waiting for user interaction.
*/
static void exitProgram(ref HFramegrabber acq, string callbackType,
bool waiting)
{
if (waiting)
{
waitUserInteraction();
}
if (null == acq)
{
System.Environment.Exit(1);
}
// Unregister the callback.
if (null != callbackType)
{
try
{
IntPtr currentCallback, context;
currentCallback =
acq.GetFramegrabberCallback(callbackType, out context);
// Already unregistered?
if (IntPtr.Zero != currentCallback)
{
acq.SetFramegrabberCallback(callbackType, IntPtr.Zero, IntPtr.Zero);
}
}
catch (HalconException exc)
{
Console.WriteLine(exc.GetErrorMessage());
}
}
// Abort the workerThread.
if (gThreadRunning)
{
try
{
// abort the current grab.
acq.SetFramegrabberParam("do_abort_grab", 1);
}
catch (HalconException exc)
{
Console.WriteLine(exc.GetErrorMessage());
}
gAcqMutex.LockMutex();
gThreadRunning = false;
gAcqCondition.SignalCondition();
gAcqMutex.UnlockMutex();
gThreadHandle.Join();
}
try
{
// Close the framegrabber.
acq.Dispose();
// Clean up.
gAcqMutex.Dispose();
gAcqCondition.Dispose();
}
catch (HalconException exc)
{
Console.WriteLine(exc.GetErrorMessage());
}
System.Environment.Exit(1);
}