how KeyPressFcn function works?

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Daniele Morello 2015-9-24

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https://ww2.mathworks.cn/matlabcentral/answers/244923-how-keypressfcn-function-works

评论： Luke Perry 2018-7-13

hi everyone, i have an edit text, pressing backspace, only when edit text become empty i want to set a string into a static text. how can i do? something like:

function edit_T KeyPressFcn(hObject, eventdata, handles)
if "press backspace" && "edit_T is empty"
       set(handles.static_text,'String',string);

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Answer 1

Walter Roberson 2015-9-24

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/244923-how-keypressfcn-function-works#answer_193617

http://www.mathworks.com/help/matlab/ref/uicontrol-properties.html#property_keypressfcn

"If you specify this property as a function handle (or cell array containing a function handle), MATLAB passes an object containing callback data as the second argument to the callback function. This object contains the properties described in the following table."

For backspace, the 'key' property will contain 'backspace'