MATLAB: How to save data from a GUI edit box to table using push button

guitable

I am trying to figure out a way to import data from 3 edit boxes using 1 push button to a table. Please help me with that. I want to say thank you in advance!

Best Answer

Dang - use the handles structure that is passed in as the third parameter to the push button callback to get the handles to the three edit text controls. If the table is part of your GUI (i.e. an uitable) then you would again use the handles structure to get the table handle and use that to update the table. For example,

 function pushbutton1_Callback(hObject, eventdata, handles)
 % get the string data from the three edit controls
 str1 = char(get(handles.edit1,'String'));
 str2 = char(get(handles.edit2,'String'));
 str3 = char(get(handles.edit3,'String'));
 % do some work 
 % update the table
 set(handles.uitable1,'Data',data);

where data is an mxn cell array of data that you wish to display within your table.

Related Solutions

MATLAB: GUI ‘uitable’ with option to add rows using push button

Add button to your code of this form: handles.uitable is the handle to your uitable.

% --- Executes on button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
data = get(handles.uitable, 'data');
data(end+1,:) = 0;
set(handles.uitable,'data',data)

MATLAB: Notification when data in a uitable changes

Stuart - I think that you can minimize the coding to achieve what you want if you use a listener against a certain property of the uitable. For example, your push buttons to add or remove a row (or column?) from your table probably do something like

 % add a new row to table
 function pushbutton1_Callback(hObject, eventdata, handles)
 data = get(handles.uitable1,'Data');
 data = [data ; cell(1,size(data,2))];
 set(handles.uitable1,'Data',data);
 % remove the last row
 function pushbutton2_Callback(hObject, eventdata, handles)
 data = get(handles.uitable1,'Data');
 if ~isempty(data)
    data(end,:) = [];
 end
 set(handles.uitable1,'Data',data);

In both cases, we update the Data property of the table. So if we listen to a change in this property then we can notify the user that he or she must save their changes.

If using GUIDE, in the _OpeningFcn of your GUI, we need to create the listener as

 function UITableListenerExample_OpeningFcn(hObject, eventdata, handles, varargin)
 handles.output = hObject;
 handles.saveBtnDefaultBColour = get(handles.pushbutton3,'BackgroundColor');
 handles.hUitableListener       =  ...
     addlistener(handles.uitable1,'Data','PostSet', ...
     @(src,event)uitableDataChangeCallback(handles.uitable1,src,event));
 % Update handles structure
 guidata(hObject, handles);

The saveBtnDefaultBColour is just to save the default background colour of the button (see how used later) and the listener will listen for Data "change" events for uitable1. When such an event occurs, the uitableDataChangeCallback will fire. By default (?) there are the source src and event input parameters. We add a third one which is just the handle to the uitable. This callback does the following

 function uitableDataChangeCallback(hObject,~,~)
 handles = guidata(hObject);
 set(handles.pushbutton3,'BackgroundColor','g');

Given the handle to the uitable, we use guidata to get the handles to all controls and user-defined data of the GUI. In this case, we are interested in the "save" button whose background we change to green to indicate to the user that their changes need to be saved.

The above only seems to work (on R2014a) when a change is made to Data explicitly. This same callback is not called when the user modifies a cell in the table. If you want the uitableDataChangeCallback to be called when a cell is modified, you would need to call this callback from the table's cell edit callback as

 function uitable1_CellEditCallback(hObject, eventdata, handles)
 uitableDataChangeCallback(hObject,[],[]);

See the attached for a working example. Perhaps some of it will be of use to you.

Best Answer

Related Solutions

MATLAB: GUI ‘uitable’ with option to add rows using push button

MATLAB: Notification when data in a uitable changes

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