jScrollPane.java.HORIZONTAL_SCROLLBAR_AS_NEEDED

Alternately, as mentioned above, you can always use the numeric values of these enumerated policies. They are less readable/maintainable, but they always work

It works only half for me, hopefully you can point me in the correct direction. Currently working with :

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MATLAB Version 7.4.0.287 (R2007a)
Operating System: Microsoft Windows XP Version 5.1 (Build 2600: Service Pack 3)
Java VM Version: Java 1.5.0_07 with Sun Microsystems Inc. Java HotSpot(TM) Client VM mixed mode
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For testing I put a button and edit on a figure in GUIDE, I have a function to change the properties of the edit:

function r = set_edit_props(varargin)
 
r = true;
try
    h           = findobj('Tag', 'edit2');
    jScrollPane = findjobj(h);
    jViewPort   = jScrollPane.getViewport;
    jEditbox    = jViewPort.getComponent(0);
    %set(jScrollPane,'HorizontalScrollBarPolicy', jScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
    %set(jScrollPane,'VerticalScrollBarPolicy', jScrollPane.VERTICAL_SCROLLBAR_NEVER);
    set(jScrollPane,'HorizontalScrollBarPolicy', 32);
    set(jScrollPane,'VerticalScrollBarPolicy', 21);
    jEditbox.setWrapping(false);
catch
    disp(lasterr)
    r = false;
end

I used the integer-values for the scrollbars because the named constants are not part of the Java object.

Problem: when I call the above function from the button-callback, then it works. But this is not what I want, I want that when the figure is made visible, the scrollbars are automatically OK. So what I tried:

1) call ‘set_edit_props’ from edit create-callback:

jScrollPane =

handle: 0-by-0

No appropriate method or public field getViewport for class handle.handle.

2) call ‘set_edit_props’ after a 2 secs delay (timer-object) started within edit create-callback (try to let everything become visible before access is requested):

jScrollPane =

handle: 1-by-0

No appropriate method or public field getViewport for class handle.handle.

3) call ‘set_edit_props’ from OpeningFcn: result as with 2)

4) call ‘set_edit_props’ via timer from OpeningFcn: result as with 1) (!)

Nothing works. Maybe you have some ideas….

Regards,

Jeroen

In the meantime, you can try Carrie’s solution above – simply use the number 30 instead of jScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED

jViewPort = jScrollPane.getViewport;
jEditbox = jViewPort.getComponent(0);
jEditbox.setWrapping(false);  % do *NOT* use set(...)!!!
newPolicy = jScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED;
set(jScrollPane,'HorizontalScrollBarPolicy',newPolicy);

but am getting this error:
?? No appropriate method, property, or field HORIZONTAL_SCROLLBAR_AS_NEEDED for class javahandle_withcallbacks.com.mathworks.hg.peer.utils.UIScrollPane.

Error in ==> blblblb at 8
newPolicy = jScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED;

Second, when using the findjobj, it returned a 1×2 matrix of objects. Turned out the UIScrollPane was the second object in the matrix, so to set the scrollbar, I did:

set(set(jScrollPane(2), 'VerticalScrollBarPolicy', 21);

Of note, Matlab said “No appropriate method, property, or field … when I tried to use jScrollPane(2).VERTICAL_SCROLLBAR_AS_NEVER instead of 21.