MATLAB: Passing data & connecting gui(s)

gui

Hi, i have 3 gui and i have 3 tab like this file that i upload how can i connect them together

every 3 gui icludes axes, pushbuttom,…

Best Answer

A specific question is more efficient than "I don't understand how it works". The code example contains useful comments already.

 % get the handle of Gui1
 h = findobj('Tag','Gui1');

Is this clear so far? Each GUI element, e.g. a figure, has a unique "handle", which can be used to access the object. Instead of seaching all GUI elements, e.g. all buttons, lines and menu entries, it is faster to restrict the search to the wanted object:

 h = findob(allchild(0), 'flat', 'Tag', 'Gui1');

Now only figures are searched.

 % if exists (not empty)
 if ~isempty(h)

A matching figure was found.

    % get handles and other user-defined data associated to Gui1
    g1data = guidata(h);

Now you can access the handles struct of the found figure. Do not get confused by the name "handles". It does contain handles of the GUI elements created by GUIDE, but you can store anything in this struct also.

Now the callback can access all elements of the figure with the tag 'Gui1', e.g. getting the values of toggle-buttons or draw in existing axes.

Search in this forum for "share data between callbacks". This works for callbacks of different figures also.

Related Solutions

MATLAB: Image file transfer from one GUI to another using setappdata and getappdata

Rupam - there are probably several different ways to do this, so here is one. Let's assume that you have two GUIs named Gui1 and Gui2 and that they are distinct GUIs (i.e. you are not running two instances of the same one). In the Property Inspector for Gui1, set the HandleVisibility property to on, and the Tag property to Gui1. This will allow us to search for the GUI given its (unique) tag. Do the same for Gui2 (except name the tag Gui2). Save both.

Now suppose that in Gui2 you want access to some of the data in Gui1. What you require, is the handle to the latter. In a (say) push button callback of Gui2, you can add the following code

 function pushbutton1_Callback(hObject, eventdata, handles)
 % get the handle of Gui1
 h = findobj('Tag','Gui1');
 % if exists (not empty)
 if ~isempty(h)
    % get handles and other user-defined data associated to Gui1
    g1data = guidata(h);
    % maybe you want to set the text in Gui2 with that from Gui1
    set(handles.text1,'String',get(g1data.edit1,'String'));
    % maybe you want to get some data that was saved to the Gui1 app
    x = getappdata(h,'x');
 end

The above example tests out two ways in which we can get data from the other GUI - use either guidata which gives us the handles to all widgets of Gui1 AND any user-defined data that had been saved in Gui1 to the handles object as

 function pushbutton3_Callback(hObject, eventdata, handles)
 % in some Gui1 callback, we create the following xData field in the handles

 % structure

 handles.xData = -2*pi:0.0001:2*pi;
 % now we save the data

 guidata(hObject,handles);

We then access this data as shown previously.

The other way is to use the setappdata and getappdata pairings. Using the previous callback for Gui1, we can save the app data as

 function pushbutton3_Callback(hObject, eventdata, handles)
 % in some Gui1 callback, we create the following xData field in the handles
 % structure
 handles.xData = -2*pi:0.0001:2*pi;
 % now we save the data
 guidata(hObject,handles);
 setappdata(handles.Gui1,'x',[1:53]);

and then retrieve it with getappdata.

NOTE how we use must use the handles.Gui1 to save/set the data. And that is it. Try the above and see what happens!

MATLAB: How to pass/share data between GUIs

Peng - please see https://www.mathworks.com/matlabcentral/answers/146215-pass-data-between-gui-s for an example of sharing data between GUIs. Your second GUI will need to be able to find the first GUI (via its tag/name) and then get the handles object for that first GUI.

In the OpenFcn of your second GUI, you could add code similar to

 % get the handle of Gui1
 h = findobj('Tag','Gui1');
 % if exists (not empty)
 if ~isempty(h)
    % get handles and other user-defined data associated to Gui1
    handlesGui1 = guidata(h);
    % get the number of tasks
    numberOfTasks = get(handlesGui1.Num_Task, 'Value')
 end

Best Answer

Related Solutions

MATLAB: Image file transfer from one GUI to another using setappdata and getappdata

MATLAB: How to pass/share data between GUIs

Related Question