Changing the displayed value of a popup item by a call

Perhaps your update code needs to run ControlUpdate/W=panelName popupControlName

Thanks for the command, however, I tried and it did not update the popup item as expected. This is what I used:

"panelName" is the string of the panel name, and SampFreqStr is the "Name" of the popup menu.

On reading the help file, it seems this commands actually update the popup by changing its underlying list of available popstr. In my case, I am not changing the list of pop string, instead I was trying to make it switch from one to another.

Roughly this is what I am trying to do:

>Set a value in the measurement panel, say SampFreq = 1e6
>It creates a string ("1e6") which matches the second one that is available in the instrument popup string list

>The popup value in the instrument panel got updated to 1e6

The problem I have was that in SetVariable the box can be associated with a variable stored somewhere. If that variable is updated I can update the displayed value in the panel. But it seems popup menu doesn't have the same association with a certain string variable.

The only (and possible ugly) method I have now is to destroy the popup box and create a new one with the popstr set to what I want.

I believe that you want to use this approach.

string pvstr = "1e6"
Popupmenu SampFreqStr, window=panelname, popvalue=pystr

The syntax for ControlUpdate is:

ControlUpdate [/A /W=winName ] [controlName ]

Note that those are names and not strings.

Usage example:
 

jjweimer wrote:

I believe that you want to use this approach.

string pvstr = "1e6"
Popupmenu SampFreqStr, window=panelname, popvalue=pystr

popMatch is more likely to work:

popmatch=matchStr    Sets mode to the enabled menu item that matches matchStr. matchStr may be a "wildcard" expression. See stringmatch. If no item is matched, mode is unchanged.

And window=panelName isn't right: wiin=panelName is right:

jjweimer wrote:

I believe that you want to use this approach.

string pvstr = "1e6"
Popupmenu SampFreqStr, window=panelname, popvalue=pystr

 

I also tried this, but strangely it didn't work (not updating the pop menu).
This can work if I added the optional argument mode=2:

JimProuty wrote:

 

jjweimer wrote:

 

I believe that you want to use this approach.

string pvstr = "1e6"
Popupmenu SampFreqStr, window=panelname, popvalue=pystr

 

 

popMatch is more likely to work:

popmatch=matchStr    Sets mode to the enabled menu item that matches matchStr. matchStr may be a "wildcard" expression. See stringmatch. If no item is matched, mode is unchanged.

And window=panelName isn't right: wiin=panelName is right:

string pvstr = "1e6"
string SampFreqStr= "sampFreq" // assuming the name of the control is "sampFreq"
String panelNameStr= "Panel0" // assming the name of the panel is "Panel0"
Popupmenu $SampFreqStr, win=$panelNameStr, popmatch=pystr

 

Thanks a lot for looking into the issue, the popmatch works and does exactly what I meant! 

I recently fixed a bug in which popMatch didn't update the displayed value. Please get the latest nightly build.

In my case the bug didn't seem to kick in, I am using Version: 8.0.2.1 (Build 32405)

The popmatch command works for me.

Thanks John for the corrections and other recommendations!