Thread Subject: how to read from 'set'

hi,
i've got such a question:
this line of a code gets me the value that is returnet by
function 'update':

set(handles.figure1,'windowbuttondownfcn','p=update')

but now i want to put whis value (p) into some variable, so
that i can use it later.but i do not know how.
can anyone suggest me anything?

 kind regards

"mark b." <john.doe.nospam@mathworks.com> wrote in message
<g3dki1$of8$1@fred.mathworks.com>...
> hi,
> i've got such a question:
> this line of a code gets me the value that is returnet by
> function 'update':
>
> set(handles.figure1,'windowbuttondownfcn','p=update')
>
> but now i want to put whis value (p) into some variable, so
> that i can use it later.but i do not know how.
> can anyone suggest me anything?
>
> kind regards

get(handles.figure1,'WindowButtonDownFcn') may work,
assuming i've understood your query properly.

i tried it, but it returns me:
ans =

p=update;

and i need the values in 'p'

"mark b." <john.doe.nospam@mathworks.com> wrote in message
news:g3dki1$of8$1@fred.mathworks.com...
> hi,
> i've got such a question:
> this line of a code gets me the value that is returnet by
> function 'update':
>
> set(handles.figure1,'windowbuttondownfcn','p=update')
>
> but now i want to put whis value (p) into some variable, so
> that i can use it later.but i do not know how.
> can anyone suggest me anything?

When you write a callback like this, the string you SET as your
WindowButtonDownFcn is executed as though you typed it at the command line,
so the variable p is created in the base workspace.

Instead, I'd recommend either modifying the update function so that it
stores the value it would have output in the figure's UserData property or
in the handles structure (using GUIDATA and/or GUIHANDLES) or explicitly
setting the output into UserData in the callback.


set(handles.figure1,'windowbuttondownfcn','set(handles.figure1,
''UserData'', update)')


Then access either the handles structure or the figure's UserData property
to access the output of the update function.

--
Steve Lord
slord@mathworks.com

set(handles.figure1,'windowbuttondownfcn','set
(handles.figure1, ''UserData'', update)')

it returns me
??? Undefined variable "handles" or class "handles.figure1".

"mark b." <john.doe.nospam@mathworks.com> wrote in message
<g3dnup$43c$1@fred.mathworks.com>...
> set(handles.figure1,'windowbuttondownfcn','set
> (handles.figure1, ''UserData'', update)')
>
> it returns me
> ??? Undefined variable "handles" or class "handles.figure1".
>
>

help GCBF

as in

set(h.f1,'..','set(gcbf,''userdata'',update)') ;

Jos

but such a thing:

 set(handles.figure1,'windowbuttondownfcn','set
(gcbf, ''UserData'', update)')
get(handles.figure1, 'UserData')


returns me:
ans =

   Empty matrix: 1-by-0

i've noticed that
set(handles.figure1,'windowbuttondownfcn','set
(gcbf, ''UserData'', update)')
    get(handles.figure1, 'UserData')

is done in the same time, so that is the reason
    get(handles.figure1, 'UserData')
returns me an empty matrix. but when i try to do it for
example:

if (set(handles.figure1,'windowbuttondownfcn','set
(gcbf, ''UserData'', update)'))

    get(handles.figure1, 'UserData')

end

it returns me: > modelGUI
??? Error using ==> set
One or more output arguments not assigned during call
to "set".

can anyone help me with that?

i've noticed that
set(handles.figure1,'windowbuttondownfcn','set
(gcbf, ''UserData'', update)')
    get(handles.figure1, 'UserData')

is done in the same time, so that is the reason
    get(handles.figure1, 'UserData')
returns me an empty matrix. but when i try to do it for
example:

if (set(handles.figure1,'windowbuttondownfcn','set
(gcbf, ''UserData'', update)'))

    get(handles.figure1, 'UserData')

end

it returns me: > modelGUI
??? Error using ==> set
One or more output arguments not assigned during call
to "set".

can anyone help me with that?

i've noticed that
set(handles.figure1,'windowbuttondownfcn','set
(gcbf, ''UserData'', update)')
    get(handles.figure1, 'UserData')

is done in the same time, so that is the reason
    get(handles.figure1, 'UserData')
returns me an empty matrix. but when i try to do it for
example:

if (set(handles.figure1,'windowbuttondownfcn','set
(gcbf, ''UserData'', update)'))

    get(handles.figure1, 'UserData')

end

it returns me: > modelGUI
??? Error using ==> set
One or more output arguments not assigned during call
to "set".

can anyone help me with that?

Why don't you just change your update function?

function update
fig=gcbf;
%your original function
.............
set(fig,'UserData',p);

finally!! :)

thank You very much:)

hmm, i think i was happy too fast.

actually it doesn't work and really do not know what to do
with this. my update function(that is not GUI!!):

function p= update
fig=gcbf;
%my function
.............
set(fig,'UserData',p);

function in GUI:

function setMouse_Callback(hObject, eventdata, handles)

set(handles.figure1,'windowbuttondownfcn','set
(gcbf, ''UserData'', update)')
points = { get(gcbf, 'UserData')}


 or

set(handles.figure1,'windowbuttondownfcn','update;')
points = { get(gcbf, 'UserData')}


or

points = { get(gcbf, 'UserData')}


all of this returns me only

    [1x0 double]



do You maybe know what still is wrong?

kind regards,