SDK Question Changing MFD buttons

[Goth]

It's not possible to change the name of the MFD buttons real-time, is it?
This is why we see something like

Prv <
Nxt <
+   <
-   <

in IMFD for example: a workaround.
For what I guess, the function char *MFD::ButtonLabel (int bt) is called by Orbiter only when the MFD it's loaded.
Indeed I tried something like this:

// Return button labels
char *MFD::ButtonLabel (int bt)
{
    // The labels for the buttons used by our MFD mode
    char *label[NButtons] = { //not "static char" but just "char"
        "B1","B2","B3","B4","B5","B6","B7","B8","B9"
    };
    if(changeButton) //an example boolean variable
        strcpy(label[0],"New"); //this changes the button
    return (bt < NButtons ? label[bt] : 0);
}

and it works only if I change the variable "changeButton" at the constructor of the MFD class, so it's useless.

So my question is: why this is not allowed by the SDK?
If there isn't any particular reason I do a request for it ^^

Thanks for reading.

 

[jarmonik]

Yes, there is a way. oapiRefreshMFDButtons() function should do the trick.:thumbup:

Edit: IMFD is using MFD::InvalidateButtons() function to update the button labels.

 

[Goth]

Oh, thanks for the answer, I will try this function.

Edit: IMFD is using MFD::InvalidateButtons() function to update the button labels.

Your MFD do not update the labels. :blink:
Or you mean "to update what the buttons do"?

 

[jarmonik]

Your MFD do not update the labels. :blink:

It do update the labels but first you need to turn on the "GlassCockbitMode" from the configuration page. I don't remenber why it was disabled by default.

 

[Goth]

Ah! Just tried. :lol:
Actually this could be set by default.

 

[Wishbone]

The source code in Precession MFD uses 2-D arrays to simplify button maintenance.