Thread implementation in 4DGL

[RahulS]

haii...anybody knows any thread concept implementation in 4DGL...

[ESPsupport]

What are you trying to achieve?

You would tend to code a non blocking main loop checking the touch panel.

If you were using serial comms, you could also add a non blocking check/read for the comms buffer within the main loop.

So most other things could go in the same place, maybe

[RahulS]

Thanks for ur reply...I am designing a GUI application and in that, first i want to display a splash screen at the same time in the back side a comport polling has to occur. So when the COM get a value, then it has to switch to another screen from the currently running splash screen. For that, i want to process has to run in parallel...splash screen and comport reading...thanks..

[ESPsupport]

What I described should work well for you.

[RahulS]

Could plz give a sample code for a non blocking main loop...

[ESPsupport]

repeat
// check comms for command, how to NAK invalid command
if (com_Count() != 0)
cmd[cmdi++] := serin() ;

if (cmdi == 3) // assumes all serial commands are 2 bytes long
// process command in 'cmd'
cmdi := 0 ;
endif
endif

// touch code processing, more detail in many Visi samples
state := touch_Get(TOUCH_STATUS); // get touchscreen status
n := img_Touched(hndl,-1) ;

if ((state == TOUCH_PRESSED) || (state == TOUCH_RELEASED) || (state == TOUCH_MOVING))
// do whatever is required
endif

forever

[RahulS]

Yes...its working good..thanks a lot....