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Issue with GUI editbox callback

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Zeke Merchant
Zeke Merchant 2014-7-14
评论： Sara 2014-7-14
I need to save the text entered into two edit boxes so that I can concatenate them with other strings to create the name of a desired file. Example code below:
function subject_editbox_Callback(hObject, eventdata, handles)
% hObject handle to subject_editbox (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
input=get(hObject,'String');
display(input)
sub=input;
function trial_editbox_Callback(hObject, eventdata, handles)
% hObject handle to trial_editbox (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
input = get(hObject,'String');
display(input)
trial = num2str(input);
% --- Executes on button press in createfile.
function createfile_Callback(hObject, eventdata, handles)
% hObject handle to createfile (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
Note: variables "displacement and "file_type" specified in individual button group SelectionChangeFcn callbacks
filed=strcat(sub,displacement);
filedesi=strcat(filed,trial);
filedesired=strcat(filedesi, file_type)
display(filedesired)
When I click on the pushbutton, it says:
"Undefined function or variable 'sub'.
Error in Vicon_GUI_Zeke>createfile_Callback (line 225) filed=strcat(sub,displacement);
Error in gui_mainfcn (line 95) feval(varargin{:});
Error in Vicon_GUI_Zeke (line 42) gui_mainfcn(gui_State, varargin{:});
Error in @(hObject,eventdata)Vicon_GUI_Zeke('createfile_Callback',hObject,eventdata,guidata(hObject))
Error while evaluating uicontrol Callback"

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采纳的回答

Sara
Sara 2014-7-14
You need to save your variables (i.e. the strings from the editboxes) as fields of the structure handles. So correct your functions as the one below:
function subject_editbox_Callback(hObject, eventdata, handles)
input=get(hObject,'String');
display(input)
handles.sub=input;
guidata(hObject, handles);
Only then you can concatenate handles.sub with handles.displacement
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Zeke Merchant
Zeke Merchant 2014-7-14
function varargout = Vicon_GUI_Zeke(varargin) % VICON_GUI_ZEKE M-file for Vicon_GUI_Zeke.fig % VICON_GUI_ZEKE, by itself, creates a new VICON_GUI_ZEKE or raises the existing % singleton*. % % H = VICON_GUI_ZEKE returns the handle to a new VICON_GUI_ZEKE or the handle to % the existing singleton*. % % VICON_GUI_ZEKE('CALLBACK',hObject,eventData,handles,...) calls the local % function named CALLBACK in VICON_GUI_ZEKE.M with the given input arguments. % % VICON_GUI_ZEKE('Property','Value',...) creates a new VICON_GUI_ZEKE or raises the % existing singleton*. Starting from the left, property value pairs are % applied to the GUI before Vicon_GUI_Zeke_OpeningFunction gets called. An % unrecognized property name or invalid value makes property application % stop. All inputs are passed to Vicon_GUI_Zeke_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 Vicon_GUI_Zeke
% Last Modified by GUIDE v2.5 14-Jul-2014 13:30:31
% Begin initialization code - DO NOT EDIT gui_Singleton = 1; gui_State = struct('gui_Name', mfilename, ... 'gui_Singleton', gui_Singleton, ... 'gui_OpeningFcn', @Vicon_GUI_Zeke_OpeningFcn, ... 'gui_OutputFcn', @Vicon_GUI_Zeke_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 Vicon_GUI_Zeke is made visible. function Vicon_GUI_Zeke_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 Vicon_GUI_Zeke (see VARARGIN)
% Choose default command line output for Vicon_GUI_Zeke handles.output = hObject;
% Update handles structure guidata(hObject, handles);
% UIWAIT makes Vicon_GUI_Zeke wait for user response (see UIRESUME) % uiwait(handles.figure1);
% --- Outputs from this function are returned to the command line. function varargout = Vicon_GUI_Zeke_OutputFcn(hObject, eventdata, handles) % varargout cell array for returning output args (see VARARGOUT); % hObject handle to figure % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)
% Get default command line output from handles structure varargout{1} = handles.output;
function subject_editbox_Callback(hObject, eventdata, handles)
% hObject handle to subject_editbox (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
input=get(hObject,'String');
display(input)
handles.sub=input
guidata(hObject, handles);
% Hints: get(hObject,'String') returns contents of subject_editbox as text
% str2double(get(hObject,'String')) returns contents of
subject_editbox as a double
% --- Executes during object creation, after setting all properties.
function subject_editbox_CreateFcn(hObject, eventdata, handles)
% hObject handle to subject_editbox (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called
% Hint: edit controls usually have a white background on Windows.
% See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'),
get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end
% --- Executes on button press in radiobutton1.
function radiobutton1_Callback(hObject, eventdata, handles)
% hObject handle to radiobutton1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hint: get(hObject,'Value') returns toggle state of radiobutton1
% --- Executes on button press in radiobutton4.
function radiobutton4_Callback(hObject, eventdata, handles)
% hObject handle to radiobutton4 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hint: get(hObject,'Value') returns toggle state of radiobutton4
% --- Executes on button press in radiobutton16.
function radiobutton16_Callback(hObject, eventdata, handles)
% hObject handle to radiobutton16 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hint: get(hObject,'Value') returns toggle state of radiobutton16
% --- Executes on button press in radiobutton3LD.
function radiobutton3LD_Callback(hObject, eventdata, handles)
% hObject handle to radiobutton3LD (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hint: get(hObject,'Value') returns toggle state of radiobutton3LD
% --- Executes on button press in radiobutton3LA.
function radiobutton3LA_Callback(hObject, eventdata, handles)
% hObject handle to radiobutton3LA (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hint: get(hObject,'Value') returns toggle state of radiobutton3LA
% --- Executes on button press in radiobutton3LV.
function radiobutton3LV_Callback(hObject, eventdata, handles)
% hObject handle to radiobutton3LV (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hint: get(hObject,'Value') returns toggle state of radiobutton3LV
function trial_editbox_Callback(hObject, eventdata, handles)
% hObject handle to trial_editbox (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
input = get(hObject,'String');
display(input)
handles.trial=input;
guidata(hObject, handles);
% Hints: get(hObject,'String') returns contents of trial_editbox as text
% str2double(get(hObject,'String')) returns contents of
trial_editbox as a double
% --- Executes during object creation, after setting all properties.
function trial_editbox_CreateFcn(hObject, eventdata, handles)
% hObject handle to trial_editbox (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called
% Hint: edit controls usually have a white background on Windows.
% See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'),
get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end
% --- Executes when selected object is changed in displacement_buttongroup.
function displacement_buttongroup_SelectionChangeFcn(hObject, eventdata, handles)
% hObject handle to the selected object in displacement_buttongroup
% eventdata structure with the following fields (see UIBUTTONGROUP)
% EventName: string 'SelectionChanged' (read only)
% OldValue: handle of the previously selected object or empty if none was selected
% NewValue: handle of the currently selected object
% handles structure with handles and user data (see GUIDATA)
switch get(eventdata.NewValue,'Tag') % Get Tag of selected object.
case 'radiobutton1'
handles.displacement='afc01c1asfh_';
case 'radiobutton4'
handles.displacement='afc04c1asfh_';
case 'radiobutton16'
handles.displacement='afc16c1asfh_';
guidata(hObject, handles);
end
% --- Executes when selected object is changed in typedata_buttongroup.
function typedata_buttongroup_SelectionChangeFcn(hObject, eventdata, handles)
% hObject handle to the selected object in typedata_buttongroup
% eventdata structure with the following fields (see UIBUTTONGROUP)
% EventName: string 'SelectionChanged' (read only)
% OldValue: handle of the previously selected object or empty if none was selected
% NewValue: handle of the currently selected object
% handles structure with handles and user data (see GUIDATA)
switch get(eventdata.NewValue,'Tag') % Get Tag of selected object.
case 'radiobutton3LD'
handles.file_type='.3LD';
case 'radiobutton_3LV'
handles.file_type='.3LV';
case 'radiobutton3LA'
handles.file_type='.3LA';
guidata(hObject, handles);
end
% --- Executes on button press in createfile.
function createfile_Callback(hObject, eventdata, handles)
% hObject handle to createfile (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
handles = guidata(hObject);
filed=strcat(handles.sub, handles.displacement);
filedesi=strcat(filed, handles.trial);
filedesired=strcat(filedesi, handles.file_type)
display(filedesired)
guidata(hObject,handles)
Sara
Sara 2014-7-14
In
displacement_buttongroup_SelectionChangeFcn
typedata_buttongroup_SelectionChangeFcn
move guidata(hObject, handles); after the switch end.

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更多回答（1 个）

Ben11
Ben11 2014-7-14
You need to "share" the data between the different callbacks of your GUI, otherwise each callback does not know what is in other callbacks.
As a solution you could store both names you wish to concatenate in the GUI handles structure and get them in any callback you want. For example you could have:
function subject_editbox_Callback(hObject, eventdata, handles)
% hObject handle to subject_editbox (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
input=get(hObject,'String');
display(input)
handles.sub=input;
guidata(hObject,handles); % IMPORTANT, keeps the handles structure updated
where handles.sub contains the name you want to use in other callbacks. Then in those callbacks, you retrieve the structure with this:
handles = guidata(hObject)
...insert your code here
guidata(hObject,handles)
Hope it's clear enough :) If not please ask for more details.

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