Command Window Output to GUI

Question

carlos Uribe 2013-4-8

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/71078-command-window-output-to-gui

评论： Prajwol Tamrakar 2021-4-14

Hello everyone,

I'm creating a GUI and at some point of it I need to run some cshells that begin printing many notifications in the command window. This all works fine, however, it would be great if all that output can be printed in the GUI itself. Is there a way of doing this? Sort of like cloning the command window into a "Static Text" field or similar in the GUI.

Any help is appreciated.

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Answer 1

Image Analyst 2013-4-8

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链接

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https://ww2.mathworks.cn/matlabcentral/answers/71078-command-window-output-to-gui#answer_81535

See if diary() or echo() can help you do what you want.

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carlos Uribe 2013-4-11

This gives me an output to a file that I haven't been able to update on the GUI

Image Analyst 2013-4-11

Then you may have to change the functions that are spewing the stuff to the command window to return the text in a string instead. If it just sort of freely spews text out asynchronously to the command window, then you may be out of luck.

Try Yair Altman's site: http://undocumentedmatlab.com/

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Answer 2

Yair Altman 2013-4-15

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/71078-command-window-output-to-gui#answer_82310

在 MATLAB Online 中打开

You can access the CW text programmatically as follows:

jDesktop = com.mathworks.mde.desk.MLDesktop.getInstance;
jCmdWin = jDesktop.getClient('Command Window');
jTextArea = jCmdWin.getComponent(0).getViewport.getView;
cwText = char(jTextArea.getText);

You can place a callback that will update your GUI whenever new text is added to the CW:

set(jTextArea,'CaretUpdateCallback',@myUpdateFcn)

More details on how the CW works internally can be found in:

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Image Analyst 2020-3-14

What version are you using? Did you compile with the -m option or the -e option? If the -e option, there is no console window so that would explain it. If -m then perhaps the compiled version does not consider the console window to be the "command" window.

Yair Altman 2020-3-15

编辑：Yair Altman 2020-3-15

Compiled applications that have a console use plain-text output, and do not send output to a Desktop window ("client") called "Command Window". Such a window is only available when you use the Matlab Desktop, and not in compiled apps (which do not display the Desktop).

The trick that I showed above uses Java code to query the text displayed in the "Command Window" client window. Compiled apps do not have such a window, so you can not query their text.

You need to programmatically redirect console output to your GUI using dedicated commands, and not rely on simple fprintf() commands.

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Answer 3

crawler 2019-2-21

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/71078-command-window-output-to-gui#answer_362116

编辑：crawler 2019-2-21

在 MATLAB Online 中打开

To use the method by @Yair Altman, you can make the intialisations (setting callbacks etc..) at the startp function of the window containing the console e.g.

function startupFcn(app)
    try
        jDesktop = com.mathworks.mde.desk.MLDesktop.getInstance;
        jCmdWin = jDesktop.getClient('Command Window');
        jTextArea = jCmdWin.getComponent(0).getViewport.getView;
        set(jTextArea,'CaretUpdateCallback',@app.setPromptFcn)
    catch
        warndlg('fatal error');
    end
end

You can add a textarea at the window to display the console text.

Then you can make a private function for the event handler as such:

methods (Access = private)
        
        function setPromptFcn(app,jTextArea,eventData,newPrompt)
           % Prevent overlapping reentry due to prompt replacement
          persistent inProgress
          if isempty(inProgress)
            inProgress = 1;  %#ok unused
          else
            return;
          end
         
          try
            % *** Prompt modification code goes here ***
            cwText = char(jTextArea.getText);
            app.TextArea.Value = cwText;
            % force prompt-change callback to fizzle-out...
            pause(0.02);
          catch
            % Never mind - ignore errors...
          end
         
          % Enable new callbacks now that the prompt has been modified
          inProgress = [];
         
        end  % setPromptFcn
    end