no update from textbox with inserttextboxline or resettextbox command

[jzhu0000]

Maybe there is an attribute to configure. After a command with inserttextbox or resettextbox, there is no update on the textbox display. But if I run displaypanel again, the new text shows up in the textbox. Why the response of textbox is delayed or skipped?

Thanks,

Jie.

[Wolfgang]

Can you provide some more information, e.g., the code of your function call or if you call InsertTextBoxLine within a callback routine ...

Did you try (and inspect) the example textbox.cws shipping with CVI?

[jzhu0000]

I ran textbox.cws with debug mode step by step using breakpoint. After inserttextboxline command is finished, there is no update in the textbox (no line is inserted). After the whole callback function is done, the update is then shown in the textbox. Could you please try?

int CVICALLBACK InsertCallback (int panel, int control, int event,
                                void *callbackData, int eventData1,
                                int eventData2)
{
    if (event == EVENT_COMMIT)
        {
        g_lineCount++;
        InsertTextBoxLine (panel, PANEL_ACTIONBOX, 0,
                           "This line is inserted at index 0 (at the top)");
        }
    return 0;
}

[jzhu0000]

If I add a line "Delay (10.0);" after inserttextboxline line, the panel textbox update will happen after the 10 seconds delay.

[Wolfgang]

---

@jzhu0000 wrote:

I ran textbox.cws with debug mode step by step using breakpoint. After inserttextboxline command is finished, there is no update in the textbox (no line is inserted). After the whole callback function is done, the update is then shown in the textbox.

---

That's what I would have expected...see here

[jzhu0000]

Yes, that fixed the problem.

Thanks a lot, Wolfgang!

[hendra@ngms]

Call ProcessDrawEvents() right after the insertion.

[jzhu0000]

Yes, that is what Wolfgang's link recommends.

Thanks.

[hendra@ngms]

Good.  Did not see that. 

I profusely use ProcessDrawEvents(),.  I write applications that typically have several asynchronous threads running.  Every time a thread updates some panel controls --buttons, textboxes, strip charts, etc -- ProcessDrawEvents() is called.