How to populate "pop-up" menu based on a variable in an edit box

I have an editbox that displays the number of cameras I have connected to my computer, at the minute I have just manually placed:

1
2
3
4

as the string to my popup menu which lets the user select which camera to activate. How can I fill this popup menu based on how many cameras are connected? So, for example if I have two connected the string of my popup menu automatically displays:

1
2

And if I have 4:

1
2
3
4

I have a box that displays the number of cameras connected, so I just have to link the popup menu to this editbox?

Answer 1

[Geoff Hayes]

Jonathan - how is the text box populated with the number of connected cameras? I think that whenever this text box is updated, you would do the same for the popup menu. Something like

 % suppose the number of connected cameras is 12
 numConnectedCameras = 12;

 % update the text box
 set(handles.text1,'String',num2str(numConnectedCameras));

 % update the popup menu
 set(handles.popupmenu1,'String',num2str((1:numConnectedCameras)'));

If the user decides on the number of connected cameras (by entering a number in the edit box) then in its callback, you would add the third line from the above (after initializing numConnectedCameras with the contents from the edit box).

[Jonathan O'Neill]

Thanks Geoff, it was populated by this code:

[ret,NoOfCams]=GetAvailableCameras;

set(handles.NoCam,'String',NoOfCams);

So I just added this under it:

set(handles.SelCampopup,'String',num2str((1:NoOfCams)'));

Now when I find out how many cameras are connected to the computer it automatically populates this popup menu, cheers!