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Problem with getting output from KeyPressFcn

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yuval
yuval 2018-2-9
评论： Adam 2018-2-9
Hello, I have a KeyPressFcn with two input variables and i would like one output variable.
Example of the code:
h = figure
set(h,'KeyPressFcn',{@pushbutton_callback,var1,var2});
function outputVar = pushbutton_callback(src,event,var1,var2)
outputVar = var1*var2;
end
The problem is that outputVar doesn't exist in the workspace afterwards...
I've read the documentation but still as it appears didn't really understand how to work with this function.
Thanks in advance.
  1 个评论
Adam
Adam 2018-2-9
Callbacks cannot define output arguments. You will need to save your value using e.g. guidata:
function pushbutton_callback(src,event,var1,var2)
hGUIData = guidata( src );
hGUIData.outputVar = var1*var2;
guidata( src, hGUIData );
end
Then it can be accessed via
hGUIData = guidata( h )
hGUIData.outputVar

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