binary passage replaces the State after commits

I have a binary switch unique control of four similar processes.  I use an EVENT_COMMIT to trap the change in his condition.

However, I notice that because of hardware lag on the side of the output, the State of the binary switch (off to ON) takes a long time to change.  Indeed, visually LabWindows is not updated the State of GUI control until after all the stuff that happens in his recall.

This seems a strange behavior for me.  The help topic for the control States:

If the binary switch mode is warm or validation, a validation event is generated when the binary switch is active and you change its status.

That does not imply that the GUI would lead the control in another thread, while the callback is processed?

I also tried EVENT_VAL_CHANGED, but who behaved the same way.  Is there another type of event or mode of operation I could try so that when the binary file is changed, the GUI is updated immediately and the callback is processed at the same time?  I don't want that there is some lag so that my user is trying to hit a second time the binary!

ElectroLund ha scritto:

That does not imply that the GUI would lead the control in another thread, while the callback is processed?

No: the Visual representation of the control is updated at end of reminder, so if the recall is long to run, you don't see the switch state change until the treatment ends.

You can inform the user that something is happening by using SetWatCursor (1) early reminder and SetWaitCursor (0) to end of reminder, or force an update of the UI calling ProcessDrawEvents () somewhere in your code (but if there are several GUI updates in the meantime time can slow down the recall in a moment of junk.

Tags: NI Software

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