Selecting radio button resets GUI [GUIDE, R2017b]

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TJ 2018-1-4

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评论： Image Analyst 2018-8-3

Hello,

I have a GUI with several edit boxes which sow the names of files which have been selected by the user. I aso have some radio buttons which dictate what operation to complete on the data which is loaded vvia the GUI.

When I have loaded the data and then click a radio button which was not the default, all the edit boxes clear and it seems as though the GUI is reinitialised. I have not used the radio button group call back for selectionChanged. All I do is check which radio button has been clicked when it comes to performing the calculations. Does anyone know why the radio button keeps reinitialising the GUI?

The code for initialising the GUI objects I have written is:

function defaultVals(hObject, handles)
% 
% This function takes the handle to the GUI figure, and structure with 
% handles and user data and sets the values of the various 
% objects on the GUI.
% Call this function in the Openingfunction of the GUI to set initial
%   values for the GUI objects.
set(handles.textPath,'string','No file loaded.');   % sets default value of textFile
set(handles.textFile,'string','No file loaded.');   % sets default value of textData
set(handles.checkbox1 , 'Enable','off');   % disable checkbox1;

I placed this function in the OpeningFcn. After using the dbstack (Thanks to Jan Simon's suggestion) I found the following call stack was produced when I placed 'dbstack' in my defaultVals function:

   In VoltageResonance>defaultVals (line 272)
    In VoltageResonance>VoltageResonance_OpeningFcn (line 58)
    In gui_mainfcn (line 220)
    In VoltageResonance (line 42)
    In matlab.graphics.internal.figfile.FigFile/read>@(hObject,eventdata)VoltageResonance('trainConfigGroup_SelectionChangedFcn',get(hObject,'SelectedObject'),eventdata,guidata(get(hObject,'SelectedObject')))

It appears that the function matlab.graphics.internal.figfile.FigFile/read causes the GUI to be run again but I am not sure where that function arises from by changing a radio button. Kind regards, TJ

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Answer 1

Jan 2018-1-4

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Then the callback of the radio button contains some code, which initializes the contents of the GUI. Without seeing the code, we cannot guess, which command it is. But you can find this out easily using the debugger: https://www.mathworks.com/help/matlab/matlab_prog/debugging-process-and-features.html Set a breakpoint in the callback and step through the code line by line. You will find, which command causes the reset. Finally remove this command.

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TJ 2018-1-4

编辑：TJ 2018-1-4

在 MATLAB Online 中打开

Hi Jan,

So I went through and debugged the code and when I have no code in the radio button callbacks. However, I did notice where the problem arises. I have a initialise function which sets all the edit text boxes and enable status' for my GUI. I placed this function call into the following function:

% --- Executes just before VoltageResonance is made visible.
function VoltageResonance_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% varargin   command line arguments to VoltageResonance (see VARARGIN)
% Choose default command line output for VoltageResonance
handles.output = hObject;
defaultVals(hObject, handles);
% Update handles structure
guidata(hObject, handles);

When I select a different radio button for some reason the code then goes to the GUI OpeningFcn.

Not sure as to why the change in a radio button causes this function to execute.

TJ 2018-1-4

在 MATLAB Online 中打开

I have played around a bit more and it seems when you click on a radio button, the code is interrupted and goes directly to the top of the m-file, in my case the GUI was called Voltage Resonance:

function varargout = VoltageResonance(varargin)
% VOLTAGERESONANCE MATLAB code for VoltageResonance.fig
%      VOLTAGERESONANCE, by itself, creates a new VOLTAGERESONANCE or raises the existing
%      singleton*.
%
%      H = VOLTAGERESONANCE returns the handle to a new VOLTAGERESONANCE or the handle to
%      the existing singleton*.
%
%      VOLTAGERESONANCE('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in VOLTAGERESONANCE.M with the given input arguments.
%
%      VOLTAGERESONANCE('Property','Value',...) creates a new VOLTAGERESONANCE or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before VoltageResonance_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to VoltageResonance_OpeningFcn via varargin.
%
%      *See GUI Options on GUIDE's Tools menu.  Choose "GUI allows only one
%      instance to run (singleton)".
%
% See also: GUIDE, GUIDATA, GUIHANDLES
% Edit the above text to modify the response to help VoltageResonance
% Last Modified by GUIDE v2.5 04-Jan-2018 18:39:01
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @VoltageResonance_OpeningFcn, ...
                   'gui_OutputFcn',  @VoltageResonance_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);

So interestingly there is a handle to the OpeningFcn so anything there would be executed every time a radio button is selected. I am not able to find any information on why the radio button triggers the .m file to start over (or call the top GUI function).

Jan 2018-8-3

@Duijnhouwer: Please post some code which reproduces the behavior you observe.

Image Analyst 2018-8-3

Sounds like user error to me. Why would you remove the callback that runs when you click on a radio button???

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Answer 2

Image Analyst 2018-1-5

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Put the function call in the OutputFcn() rather than the OpeningFcn() and see if that helps.

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