use a push button to close the GUI

Question

avram alter 2019-9-26

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/482362-use-a-push-button-to-close-the-gui

评论： Adam Danz 2019-10-7

I have a GUI that has a pushbutton that gets enabled once a certain condition has been met. I want to use that push button to then close the GUI.

here is my code:

function varargout = WorkingGUI3(varargin)
% WORKINGGUI3 MATLAB code for WorkingGUI3.fig
%      WORKINGGUI3, by itself, creates a new WORKINGGUI3 or raises the existing
%      singleton*.
%
%      H = WORKINGGUI3 returns the handle to a new WORKINGGUI3 or the handle to
%      the existing singleton*.
%
%      WORKINGGUI3('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in WORKINGGUI3.M with the given input arguments.
%
%      WORKINGGUI3('Property','Value',...) creates a new WORKINGGUI3 or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before WorkingGUI3_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to WorkingGUI3_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 WorkingGUI3
% Last Modified by GUIDE v2.5 26-Sep-2019 17:02:03
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @WorkingGUI3_OpeningFcn, ...
                   'gui_OutputFcn',  @WorkingGUI3_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 WorkingGUI3 is made visible.
function WorkingGUI3_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 WorkingGUI3 (see VARARGIN)
handles.uipanels = [handles.uipanel1, handles.uipanel2];
set(handles.pushbutton5, 'enable', 'off');
% Choose default command line output for WorkingGUI3
handles.output = hObject;
% Update handles structure
guidata(hObject, handles);
% UIWAIT makes WorkingGUI3 wait for user response (see UIRESUME)
% uiwait(handles.figure1);
end
% --- Outputs from this function are returned to the command line.
function varargout = WorkingGUI3_OutputFcn(hObject, eventdata, handles)
delete(instrfind('Port', 'COM3')); 
tag = serial('COM3'); %check which port is used
fopen(tag);
BOX = char(zeros(2,14));
TrueValueData = 'C:\RfidChipTrueValues.xlsx';
[~,~,TrueValMat] = xlsread(TrueValueData);
% Creates matrix filled with the correct values, 
% indexed by box, which is the first row
% all proceeding rows are the master value
for i=1:inf
 for n = 1:2
     if i>10
         readData = fscanf(tag);
         if length(readData)>12
             BOX(str2num(readData(8)),1:14)= readData(11:24); 
             if strcmp(TrueValMat{2,n}, BOX(n,:)) 
                 set(handles.uipanels(n), 'BackgroundColor', 'g');
             else 
                set(handles.uipanels(n), 'BackgroundColor', 'r');
             end
             drawnow
              if strcmp(TrueValMat{2,1}, BOX(1,:))...
                    && strcmp(TrueValMat{2,2}, BOX(2,:)) == 1
                set(handles.pushbutton5, 'enable', 'on');
            end
             
             
 end
     end
 end
end
% 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;
end
% --- Executes on button press in pushbutton5.
function pushbutton5_Callback(hObject, eventdata, handles)
closereq();
end
% hObject    handle to pushbutton5 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
end

everythig works fine, the button becomes enabled after my conditions are met, but pressing the button does nothing. I have also used closereq, close(handles.WorkingGUI3), delete(handles.WorkingGUI3). all help is appreciated.

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Answer 1

Adam Danz 2019-9-26

3
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/482362-use-a-push-button-to-close-the-gui#answer_393686

编辑：Adam Danz 2019-9-26

在 MATLAB Online 中打开

Use the close request function

https://www.mathworks.com/help/matlab/ref/closereq.html

function pushbutton5_Callback(hObject, eventdata, handles)
closereq(); 
end

Only use gcf() or gca() when there is no other possible way to get the handle to a figure. For GUIDE GUIs, you can get the handle to the figure from the handles input (example: handles.figure1).

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Adam Danz 2019-9-26

编辑：Adam Danz 2019-9-26

在 MATLAB Online 中打开

I see now... First let's understand what went wrong so it doesn't happen again.

The problem

When I open your GUI I get an error "Port: COM3 is not available" because the outputFcn is working with a serial port that apparently isn't available on my machine. The GUI still appears despite the error but when I press the button, the error appears again. I assume this is not a problem for you so I just added a "return" at the top of the function so I could continue troubleshooting.

Then when I pressed the Certify button, another error came up that you should have also seen and reported in this thread:

Unrecognized function or variable 'pushbutton5_Callback'.
Error in gui_mainfcn (line 95)
        feval(varargin{:});
Error in WorkingGUI3 (line 42)
    gui_mainfcn(gui_State, varargin{:});
Error in
matlab.graphics.internal.figfile.FigFile/read>@(hObject,eventdata)WorkingGUI3('pushbutton5_Callback',hObject,eventdata,guidata(hObject)) 
Error while evaluating UIControl Callback.

Your m file does have that function but the GUI doesn't recognize it. This happens when a callback function is added, deleted, or it's name was changed from within the m-file rather than from GUIDE. This is one of the major pains with GUIDE GUIs. All callbacks must be added, removed, and renamed from withing GUIDE.

The solution

Here are the steps to fix this.

Backup the m-file and fig-file in case additional problems arise (you can always download them from your attachment above, too).
Open the m-file.
If the outputFcn is throwing an error (as I shared above), comment that stuff out or remove it for now - that's a separate issue.
This step is optional but recommended. Select the entire m-file (ctrl+a) and smart-indent the code so everything is properly aligned (ctrl+i)
Select the entire pushbutton5_Callback function and delete all of it. That's 7 lines of code including comments.
I see you added "end" to all functions (including the main function). That's not necessary so remove all of the "end"s for the functions: one for the WorkingGUI3_OpeningFcn, one for WorkingGUI3_OutputFcn, and one for the main function on the last line (3 total).
Save the m-file and remove all breaks, if any. To do that, from the editor select Breakpoints > Clear All; then close the m file and the figure.
Open the figure in GUIDE: guide WorkingGUI3
Right click the Certify button and open property inspector.
Select everything in the Callback row on the right and delete it; close the property inspector.
Click file > save (this will probably open the m file again which is OK).
Again from within GUIDE, right click Certify button, select View Callbacks, and then select "Callback". That will add a new callback function to your m-code.
Save the GUIDE and close it.
In the new callback function added to your m-file, you can modify it to add the closereq();
Save the m-file and run the GUI.

Adam Danz 2019-10-2

在 MATLAB Online 中打开

Good that you're not geting the com3 error.

Two things...

First, I noticed that your pushbutton5 is still not linked to your GUIDE gui. I opened your GUI in GUIDE, right-clicked the button, and selected callback. Then this window popped up (r2019a & b)

Close your GUI, open it in GUIDE and do the same thing. When this window appears. select Yes. Then save the gui but before running the gui, add this line of code in your pushbutton5 callback function:

disp('Success')

Then run the GUI and press the button. To confrirm that the callback is linked to the GUI you should see that message in the command window.

Second thing: After doing that, your GUI will not close when you press that button. For whatever reason, prior to this change your GUI closed for me but not anymore. To fix that, you have to add the closereq() to the callback (see my 'answer' above).

That should solve the problem.

Here are some additional steps if the problem persists after those changes:

Are you sure you're saving and re-opening the figure after you make changes?
Are you sure the button is enabled when you're pressing it (it looks different when disabled)?
Have you checked that there aren't multiple m and fig files with the same name and that you're using the updated m and fig files?

avram alter 2019-10-7

I could try that, but I don't see any need to. I think the reason you aren't having the problem is that the incoming serial data is interfering. Maybe not. I don't know.

Adam Danz 2019-10-7

Ahhhh..... I see. That's probably it. Thanks for the update!

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use a push button to close the GUI

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