how to check edit textbox for character arguements

Question

Nicholas Mun 2022-4-13

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1695360-how-to-check-edit-textbox-for-character-arguements

回答： Image Analyst 2022-4-13

I want to make a textboc input where if the input is '1' function a will excecute, and if input is '2' then function b will execute, but i am getting an error in the if arguement. here is the complete code

function varargout = FOPfinal(varargin)
% FOPFINAL MATLAB code for FOPfinal.fig
%      FOPFINAL, by itself, creates a new FOPFINAL or raises the existing
%      singleton*.
%
%      H = FOPFINAL returns the handle to a new FOPFINAL or the handle to
%      the existing singleton*.
%
%      FOPFINAL('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in FOPFINAL.M with the given input arguments.
%
%      FOPFINAL('Property','Value',...) creates a new FOPFINAL or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before FOPfinal_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to FOPfinal_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 FOPfinal
% Last Modified by GUIDE v2.5 13-Apr-2022 11:59:36
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @FOPfinal_OpeningFcn, ...
                   'gui_OutputFcn',  @FOPfinal_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 FOPfinal is made visible.
function FOPfinal_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 FOPfinal (see VARARGIN)
% Choose default command line output for FOPfinal
handles.output = hObject;
% Update handles structure
guidata(hObject, handles);
% UIWAIT makes FOPfinal wait for user response (see UIRESUME)
% uiwait(handles.figure1);
% --- Outputs from this function are returned to the command line.
function varargout = FOPfinal_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;
% --- Executes on button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)
errordlg ('Covert any text into morse code with this app! To decode morse code back into text, press the SWITCH button','Help me')
% 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)
function text_input_Callback(hObject, eventdata, handles)
% hObject    handle to text_input (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% Hints: get(hObject,'String') returns contents of text_input as text
%        str2double(get(hObject,'String')) returns contents of text_input as a double
text_input=get(hObject,'string');
handles.text_input=text_input;
guidata(hObject,handles);
% --- Executes during object creation, after text_setting all properties.
function text_input_CreateFcn(hObject, eventdata, handles)
% hObject    handle to text_input (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 pushbutton2.
function pushbutton2_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
setting_text = get(handles.text_setting);
userinput = handles.text_input;
moutput = '';
if setting_text == 1
    userinput = upper(userinput);
    userinput = strjoin(strsplit(userinput));
    morsecode={'.----','..---','...--','....-','.....','-....','--...','---..','----.','-----','.-','-...','-.-.','-..','.','..-.','--.','....','..','.---','-.-','.-..','--','-.','---','.--.','--.-','.-.','...','-','..-','...-','.--','-..-','-.--','--..','/'};
    NumberOrLetter={'1','2','3','4','5','6','7','8','9','0','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z',' '};
    for i=1:length(userinput);
        [~, index] = ismember(userinput(i), NumberOrLetter);
        if index > 0
            moutput = [moutput ' ' morsecode{index}];
        end     
    end
    
    set(handles.morse, 'String' , moutput);
end
if setting_text == 2
    morsecode = {'.-','-...','-.-.','-..','.','..-.','--.','....','..','.---','-.-','.-..', ...
            '--','-.','---','.--.','--.-','.-.','...','-','..-','...-','.--','-..-', ...
            '-.--','--..'};
    letter = char('A':'Z');
    symbol = strsplit(userinput, ' ');
    for i = 1:length(symbol)
        moutput = [moutput ' ' morsecode{i}]
    end
    set(handles.morse, 'String' , moutput);
end
function text_setting_Callback(hObject, eventdata, handles)
% hObject    handle to text_setting (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% Hints: get(hObject,'String') returns contents of text_setting as text
%        str2double(get(hObject,'String')) returns contents of text_setting as a double
text_setting=get(hObject,'string');
handles.text_setting=text_setting;
guidata(hObject,handles);
% --- Executes during object creation, after text_setting all properties.
function text_setting_CreateFcn(hObject, eventdata, handles)
% hObject    handle to text_setting (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 pushbutton4.
function pushbutton4_Callback(hObject, eventdata, handles)
errordlg ('To convert text into morse code, enter "1" into the box, and to convert morse code back into text please enter "2" into the box','Tutorial')
% hObject    handle to pushbutton4 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

This is the part of the code where the if function arguement is used. the error says that '==' is not a supported operand type of 'struct' but i dont know how to fix that

if setting_text == 1
    userinput = upper(userinput);
    userinput = strjoin(strsplit(userinput));
    morsecode={'.----','..---','...--','....-','.....','-....','--...','---..','----.','-----','.-','-...','-.-.','-..','.','..-.','--.','....','..','.---','-.-','.-..','--','-.','---','.--.','--.-','.-.','...','-','..-','...-','.--','-..-','-.--','--..','/'};
    NumberOrLetter={'1','2','3','4','5','6','7','8','9','0','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z',' '};
    for i=1:length(userinput);
        [~, index] = ismember(userinput(i), NumberOrLetter);
        if index > 0
            moutput = [moutput ' ' morsecode{index}];
        end     
    end
    
    set(handles.morse, 'String' , moutput);
end

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Answer 1

Walter Roberson 2022-4-13

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1695360-how-to-check-edit-textbox-for-character-arguements#answer_941700

编辑：Walter Roberson 2022-4-13

在 MATLAB Online 中打开

text_setting=get(hObject,'string');

It says right there, text_setting will be a string (well, really, character vector rather than string() object.)

if setting_text == 1

You are comparing the character vector to a numeric value. That is not likely to do what you want.

Have you considered using a checkbox or pushbutton or listbox instead of a uicontrol 'edit' ? If you use a checkbox or pushbutton then you would fetch the 'Value' property from the object, and it would be 0 (not checked, not pushed) or 1 (checked, or pushed), or it would be 1 through the number of entries in the listbox (unless the user had not selected anything, in which case it could be empty.)

If for some reason you want to continue using a uicontrol style 'edit' then you need

text_setting = str2double(get(hObject, 'String'));

Note: the 'String' property for a uicontrol checkbox or pushbutton is the label for the control, and has nothing to do with the state of the control. The 'String' property for a dropbox or listbox is the list of labels, in order, and does not reflect which one the user has chosen.