Guide handing objects to functions

Question

Robert Worm 2018-8-17

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/415215-guide-handing-objects-to-functions

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
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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 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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Answer 1

ES 2018-8-17

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/415215-guide-handing-objects-to-functions#answer_333107

在 MATLAB Online 中打开

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
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Stephen23 2018-8-17

编辑：Stephen23 2018-8-17

在 MATLAB Online 中打开

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