How to update value of a variable when a button is pushed? What am I doing wrong in this code?
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Safeena Ahsan
on 5 Jun 2020
Answered: Image Analyst
on 6 Jun 2020
I have introduced a variable "value" in the opening function. I want to add a specific number in the same variable when a button is pressed and then want it to update on when next button is pressed. Then I want to display the final value of the variable "value" when pushbutton10 is pressed.
When I run this code, it gives zero as output no matter what button is pressed. Please check this code and tell me what am I doing wrong here? It would be a great help!
function varargout = aaabbb(varargin)
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name', mfilename, ...
'gui_Singleton', gui_Singleton, ...
'gui_OpeningFcn', @aaabbb_OpeningFcn, ...
'gui_OutputFcn', @aaabbb_OutputFcn, ...
'gui_LayoutFcn', [], ...
'gui_Callback', []);
if nargin && ischar(varargin{1})
gui_State.gui_Callback = str2func(varargin{1});
end
if nargout
[varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
gui_mainfcn(gui_State, varargin{:});
end
% End initialization code - DO NOT EDIT
% --- Executes just before aaabbb is made visible.
function aaabbb_OpeningFcn(hObject, eventdata, handles, varargin)
% Choose default command line output for aaabbb
handles.output = hObject;
handles.value=0;
% Update handles structure
guidata(hObject, handles);
% --- Outputs from this function are returned to the command line.
function varargout = aaabbb_OutputFcn(hObject, eventdata, handles)
varargout{1} = handles.output;
% --- Executes on button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)
handles.value = handles.value + 148;
% --- Executes on button press in pushbutton2.
function pushbutton2_Callback(hObject, eventdata, handles)
handles.value = handles.value + 161;
% --- Executes on button press in pushbutton3.
function pushbutton3_Callback(hObject, eventdata, handles)
handles.value = handles.value + 7;
% --- Executes on button press in pushbutton4.
function pushbutton4_Callback(hObject, eventdata, handles)
handles.value = handles.value + 0;
% --- Executes on button press in pushbutton5.
function pushbutton5_Callback(hObject, eventdata, handles)
handles.value = handles.value + 45;
% --- Executes on button press in pushbutton6.
function pushbutton6_Callback(hObject, eventdata, handles)
handles.value = handles.value + 80;
% --- Executes on button press in pushbutton7.
function pushbutton7_Callback(hObject, eventdata, handles)
handles.value = handles.value + 82;
% --- Executes on button press in pushbutton8.
function pushbutton8_Callback(hObject, eventdata, handles)
handles.value = handles.value + 3;
% --- Executes on button press in pushbutton9.
function pushbutton9_Callback(hObject, eventdata, handles)
handles.value = handles.value + 0;
% --- Executes on button press in pushbutton10.
function pushbutton10_Callback(hObject, eventdata, handles)
disp(handles.value)
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Accepted Answer
Image Analyst
on 6 Jun 2020
You need to put a static text label on your GUI with a tag of txtValue (or whatever you want). Then in each callback where you want to change handles.value you need to have this:
handles.value = handles.value + 80; % Or whatever value you want.
handles.txtValue.String = sprintf('The Value now = %.1f', handle.value);
% Update handles structure
guidata(hObject, handles); % Not calling this was your problem.
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