Advanced MATLAB: Handles and other inputs to GUIDE callbacks

There are three inputs to every automatically generated callback from GUIDE:

function edit1_Callback(hObject, eventdata, handles)

A common question that I am asked is “What is the handles structure?” This four minute video will show a simple GUI where you edit some text, and press a button that will copy that text into a third uicontrol. This is all done using the handles structure. The other two inputs: hObject and eventdata will be briefly discussed also.

Video Content

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9 Responses to “Advanced MATLAB: Handles and other inputs to GUIDE callbacks”

Quan replied on April 17th, 2008 at 5:15 pm :

Nice video as usual. You need a nickname of some sorts . . . I was thinking “The MATLAB Evangelist” might a good one.

But seriously, good videos. I want to start linking them from blinkdagger because I think the tutorials supplement each other very well.

naor replied on April 17th, 2008 at 7:49 pm :

Doug,
Can you explain about guidata(hObject,handles)? I thought this was necessary after any change to handles.
Thanks

Doug replied on April 18th, 2008 at 8:15 am :

Quan,

We actually had “MATLAB Evangelist” as a title for while when Scott was looking for people. Looks like we took that out of the title, but there are plenty of jobs like that for MATLAB geeks.

http://www.mathworks.com/company/jobs/opportunities/ApplicationEngineering.html

Send me a resume, we will see what we can do.

Doug

Doug replied on April 18th, 2008 at 8:17 am :

Naor,

About GUIDATA: That is a a different way of interacting with handles. I prefer handles to be more of a read-only type of structure. If I want to store data, then I advocate SETAPPDATA. See my video on this:

http://www.mathworks.com/matlabcentral/fileexchange/loadFile.do?objectId=8616&objectType=FILE

Doug

jiro replied on April 18th, 2008 at 3:21 pm :

Quan,

There’s actually 6 of us at The MathWorks with an internal title of “LTC Evangelist” (LTC = Language of Technical Computing = MATLAB). I am one of them, and Doug used to be in this group as well.

amiryousuf replied on May 6th, 2008 at 3:31 am :

Hello, Can we output data entered by user in dialogbox to command window?
thanks in advance.

Administrator replied on May 6th, 2008 at 11:00 am :

Amir,

You would simply modify the callback to use the DISP command to display any data you want.

Doug

amiryousuf replied on May 7th, 2008 at 6:53 am :

thanks for the idea. it is working.

Tayfun replied on July 27th, 2008 at 6:38 am :

ıt is very good video. I learn a lot of new things about gui

About

Doug Hull is an Application Engineer at The MathWorks. A MATLAB user since 1994, he gets paid to live, eat, and breathe MATLAB! This blog is dedicated to promoting the File Exchange by highlighting files and original video content.

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April 17th, 2008