Output not shown in edit text box in GUI

I am trying to write the output(count of detected vehicles) in the edit box. Once I run the GUI, I get those values in the command window, but not in the edit text box. What am I doing wrong?

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Answer 1

[Geoff Hayes]

Smitha - try converting your numbers (the output of the call to Intelligent_Traffic_Control to strings using num2str

 set(handles.edit1,'String',num2str(output1));

I'm assuming that the output variables are numeric...

[Smitha K]

Hey, thanks for the reply. I've tried using num2str too.. doesn't work that way, either.

[Geoff Hayes]

Smitha - wait. Why is this code in the edit1_CreateFcn? If you are trying to update the text while this control is being created, then I don't think that this will work.

Please remove this code (to call your Intelligent_Traffic_Control and set the edit controls) and place it in the OpeningFcn of your GUI.

[Smitha K]

OpeningFcn or OutputFcn?

[Geoff Hayes]

Use the OpeningFcn. See Initializing UI components in GUIDE apps for details.

[Image Analyst]

Place Intelligent_Traffic_Control in whatever callback you want to call it in. Perhaps it's the OpeningFcn() but it might be in the callback of a "Go!" pushbutton that you perhaps push after you've done something like clicked on a video file in a listbox or clicked a button to snap a photo from a camera. I never ever put anything in the CreateFcn() functions. Basically you should just ignore all CreateFcn() callbacks and never put anything into them.

Be sure to see my additional corrections in my answer below.

Answer 2

[Image Analyst]

In addition to the correction Geoff gave you, your set() commands send the outputs all to the SAME edit field control, not different ones. Use different controls:

set(handles.edit1, 'String', num2str(output1));
set(handles.edit2, 'String', num2str(output2));
set(handles.edit3, 'String', num2str(output3));

Also, if you have R2014b or later, do it the modern OOP way:

handles.edit1.String = num2str(output1);
handles.edit2.String = num2str(output2);
handles.edit3.String = num2str(output3);

and make sure call guidata() before the end of the callback since you're changing the handles structure

% Update handles structure
guidata(hObject, handles);