How can I pass the handles structure to 'WindowButtonUpFcn' associated callback?

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MRR on 13 Aug 2012
Commented: Walter Roberson on 23 Apr 2018
I am currently developing a Guide. Within callbacks functions created by the Guide itself I have no problem to get the handles inside them, i.e.:
function listbox1_Callback(hObject, eventdata, handles)
% here I have access to handles structure, I can modify anything and can save %the
% modifications by doing "guidata(hObject, handles)"
However, I have associated a set of functions for mouse operations:
How could I pass to them the handles structure automatically?. For example, this does not work (and however works in any callback created by Guide, i.e, any function associated with a Guide object).
function mouse_up(hObject,eventdata,handles)
%I dont get handles here structure here
My temporal and poor solution is to save the handles structure by doing set(0,'userdata',handles) and handles = get(0,'UserData') within the aforementioned functions, but I would simply like to use guidata(hObject, handles) as I do for all the callback functions associated with each guide object.

Accepted Answer

Walter Roberson
Walter Roberson on 13 Aug 2012
function mouse_up(hObject,eventdata)
handles = guidata( ancestor(hObject, 'figure') );
Walter Roberson
Walter Roberson on 23 Apr 2018

It turns out that guidata() automatically chases ancestor(), so you can just do

function mouse_up(hObject, eventdat)
  handles = guidata(hObject);

This will be empty in any CreateFcn that is run before the OpenFcn is run (that is, it will be empty for all CreateFcn for objects created out of the .fig file because you pre-created them in GUIDE.)

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