Hot to set fields from one GUI to another

Dear all,

I've been able to transfer variables from one gui to another, there's plenty of stuff around on that.

What I haven't been able to do is to set a field of a GUI from another GUI.

Here's an example: I have two GUIs opened: GUI1 and GUI2. GUI1 has a text box, GUI2 has a push button. Now, when I push the button on GUI2 I would like so set the string in the text box of GUI1 to something.

How can I achieve this?

Thanks!

Lorenzo

Answer 1

[Mischa Kim]

Hello Lorenzo, check out this answer.

[Lorenzo]

Thanks a lot Mischa. I'm not sure the answer you posted is for the same issue I am having though (but I might be wrong...)

What I need is to have something like this in my sub_GUI: set(mainGui.edit,'String','My string')

Thanks again!

Lorenzo

Answer 2

[Jan]

If you can provide variables from one GUI to the other, you can provide the handles struct also. And there you find the handles of the GUI objects. If your GUIs have the tags "GUI1" and "GUI2" (a bad choice, by the way), you can set the text of an object in GUI1 from a callback of GUI2:

function ButtonCallback(hObject, EventData, handles)
% Better do this once only!
gui1H = findobj(allchild(0), 'flat', 'tag', 'GUI1');   % [EDITED]

gui1Handles = guidata(gui1H);
set(gui1Handles.Button1, 'String', 'hello')

Add a TRY/CATCH for a meaningful error message, if the 2nd GUI has been closed before.

[Lorenzo]

Thanks Jan.

Quick question: as you said, this way I can set a textBox in GUI1 using a button in GUI2. To this extent, why is your findobj looking for GUI2 instead of GUI1 if the handle I need to set is GUI1?

Thanks again!

[Jan]

@Lorenzo: This was a typo. Fixed now.

Answer 3

[Lorenzo]

Mischa, Jan,

I found my answer in Mischa's link: in my GUI2 I now have:

function pushbutton1_Callback(hObject, eventdata, handles)
mainGUIdata = guidata(GUI1);
set(mainGUIdata.edit1, 'String', 'Hello')

and this is working.

Now, what is the purpose of

gui2H = findobj(allchild(0), 'flat', 'tag', 'GUI2');

in Jan's reply?

Thanks again for your time.

[Jan]

In the code you have posted, the variable GUI1 seems to be undefined. Beside the typo, that in my code GUI2 and GUI1 have been confused, the FINDOBJ is used to find the handle of the other GUI. It would be better to obtain this handle e.g. when the other figure is created.

[Lorenzo]

GUI1 is the name of my first GUI (ie I call it with GUI1.m). It works apparently... This is not a good way to achieve that?

[Lorenzo]

The fact is no matter what I keep getting:

gui1H =

     Empty matrix: 0-by-1

[Lorenzo]

Sorry to keep adding stuff... it appears to be working now, I had to use My GUI's tag in the place of 'GUI1', still, I would be interested if there was a more direct way to do this when my gui is started

Answer 4

[Lorenzo]

I guess it doesn't work eventually... when I do guidata(GUI1) it appears to be working but indedd it runs GUI1 from start back again.... Any advise?

Thanks!

[Lorenzo]

Meaning: as Jan suggested, how can I get the handle of a gui once this is launched? SOmething like:

myGuiHandle=GUI1