Question

I already have the functions required to drag and drop a single box in a figure in MATLAB. The code I wrote fills the figure with several boxes. With another loop I filled the figure with more boxes (which hold different information in string form).

These two sets of boxes are related by the numbers I placed in their UserData (corresponding numbers; for each box, there’s another with the same UserData content). By finding boxes containing the same UserData (and thus relating them) I want to be able to relocate a member of the first set of boxes to the same position relative to the corresponding member of the second set of boxes, by means of right clicking on the box I just dragged (uicontextmenu).

function recallfcn(hObject,eventdata)
for ydx=1:2
    diag_detail=get(gco,'UserData');   % This line should be in the drag fcn
    diag_pos=get(gco,'Position');      % So should this one (for current objects)
    xvar=diag_pos(1,1);
    yvar=diag_pos(1,2);
    detail=[diag_detail ydx]; 
    set(findobj('UserData',detail),'Position',[xvar+(ydx-1.5) yvar+0.5 0.8 0.8]);
end
end

% ydx is only there to add another level of detail as I'm actually looking to move     
% two boxes of the 'first kind', each of which have 2 numbers in user data, the first  
% number being the same, and the second number distinguishing the first box from the 
% second. The premise is the same.

Answer 1

I usually use findall instead of findobj, in case the handles of the objects are not visible from the outside. Other than that I don’t see why your code wouldn’t work.

Here’s an example:

%# make a figure with two buttons, same userData
fh=figure,
uicontrol('userdata',[2 3],'parent',fh)
uicontrol('userData',[2 3],'units','normalized','position',[0.5 0.5,0.1 0.1],'parent',fh)

%# change color to red
set(findall(fh,'userData',[2 3]),'backgroundcolor','r')

%# move to the same position
set(findall(fh,'userData',[2 3]),'position',[0.3,0.3,0.1,0.1])