Guide handing objects to functions

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Robert Worm
Robert Worm 2018-8-17
评论： Robert Worm 2018-8-17
Using Guide I have two radiobuttons. When pushing one the other has to be unchecked. So far this is my solution:
function distButton_Callback(hObject, eventdata, handles)
checkThis = get(handles.distButton, 'Value');
checkThat = get(handles.fftButton, 'Value');
if checkThis == checkThat
set(handles.fftButton, 'Value', ~checkThis);
end
Since there are four button pairs a function would save a couple of lines.
Calling the function:
checkThis('distButton', 'fftButton', handles);
However combining handles. with a string does not seem to convert this to 'distButton'
> Reference to non-existent field 'this'.
function checkThis(this, that, handles)
checkThis = get(handles.this, 'Value');
checkThat = get(handles.that, 'Value');
if checkThis == checkThat
set(handles.that, 'Value', ~checkThis);
end
It's probably a simple matter of syntax..
  2 个评论
Adam
Adam 2018-8-17
Why are you not just placing the radio buttons inside a uibuttongroup which does the mutual exclusivity for you?
Robert Worm
Robert Worm 2018-8-17
Since this is my first time working with guide, I was simply not aware of that. Thanks for the advice.

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采纳的回答

ES
ES 2018-8-17
function checkThis(this, that, handles)
checkThis = get(eval(['handles.', this]), 'Value');
checkThat = get(eval(['handles.', that]), 'Value');
if checkThis == checkThat
set(eval(['handles.', that]), 'Value', ~checkThis);
end
  3 个评论
显示 1更早的评论
Stephen23
Stephen23 2018-8-17
编辑：Stephen23 2018-8-17
Do NOT follow this answer! There is absolutely no point in using ugly eval like that, unless you want to force yourself into writing slow, complex, buggy, hard-to-debug code.
It is so easy to write simpler and much more efficient code:
function checkThis(this, that, handles)
checkThis = get(handles.(this),'Value');
checkThat = get(handles.(that),'Value');
if checkThis==checkThat
set(handles.(that),'Value',~checkThis);
end
https://www.mathworks.com/help/matlab/matlab_prog/generate-field-names-from-variables.html
And, as Adam already wrote, a uibuttongroup would be even simpler.
Robert Worm
Robert Worm 2018-8-17
Much appreciated. I will take this into account.

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