how to created and get data for use several action in pushbutton GUI?

Question

chan 2018-1-23

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/378464-how-to-created-and-get-data-for-use-several-action-in-pushbutton-gui

评论： Jan 2018-1-26

%Sample code
function a_input_Callback(hObject, eventdata, handles)
input = str2num(get(hObject,'String'));
if (isempty(input))
set(hObject,'String','0')
end
guidata(hObject, handles);
function a_input_Callback(hObject, eventdata, handles)
input = str2num(get(hObject,'String'));
if (isempty(input))
set(hObject,'String','0')
end
guidata(hObject, handles);
%for example I have push button
function add_push_Callback(hObject, eventdata, handles)
a = get(handles.a_input,'String');
b = get(handles.b_input,'String');
total = str2num(a) + str2num(b);
c = num2str(total);
set(handles.answer,'String',c);
guidata(hObject, handles);
function div_push_Callback(hObject, eventdata, handles)
a = get(handles.a_input,'String');
b = get(handles.b_input,'String');
total = str2num(a) / str2num(b);
c = num2str(total);
set(handles.answer,'String',c);
guidata(hObject, handles);
% What I want to as is, I dont want to create a = get(handles.a_input,'String'); 
% and b = get(handles.b_input,'String'); again and again in each button action
%just want to create it only one time and than we can call it to do use in each button.
Thanks!

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Jan 2018-1-23

Your question is hard to read. Please consider http://www.mathworks.com/matlabcentral/answers/13205-tutorial-how-to-format-your-question-with-markup.

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Answer 1

Jan 2018-1-23

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/378464-how-to-created-and-get-data-for-use-several-action-in-pushbutton-gui#answer_301368

在 MATLAB Online 中打开

You have 2 "a_input_Callback" in your posted code.

You can use the same callback with different input arguments, if you want to run the same code:

function op_push_Callback(hObject, eventdata, handles, operator)
a = str2num(get(handles.a_input, 'String'));
b = str2num(get(handles.b_input, 'String'));
switch operator
  case '+'
    r = a + b;
  case '/'
    r = a / b;
  otherwise
    error('Bad operator: %s', operator);
end
c = num2str(total);
set(handles.answer, 'String', c);
end

Now you can define the callbacks accordingly adding the wanted operator. I'm not sure how this works in GUIDE, but it must be easy to define it as additional argument.

If handles was not changed in a callback, guidata(hObject, handles); is not needed.