How can I set the string of a pushbutton using another pushbutton created with uicontrol ?

Question

Philippe Vo 2017-2-9

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/324088-how-can-i-set-the-string-of-a-pushbutton-using-another-pushbutton-created-with-uicontrol

回答： Saurabh Gupta 2017-2-15

在 MATLAB Online 中打开

Inside Main Function (creates a pushbutton in separate figure)

uicontrol('Style','Pushbutton','Callback',@command_fc);

Separate function (another .m file) (set the string of pushbutton1 to 100 in the main figure)

function [  ] = command_fc( hObject, handles)
set(handles.pushbutton1,'String','100');
end

The error I get when I try this:

No appropriate method, property, or field
'pushbutton1' for class
'matlab.ui.eventdata.ActionData'.
Error in command_fc (line 5)
set(handles.pushbutton1,'String','100');
Error while evaluating UIControl Callback

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Saurabh Gupta 2017-2-15

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/324088-how-can-i-set-the-string-of-a-pushbutton-using-another-pushbutton-created-with-uicontrol#answer_254905

When you specify the callback function, you use the syntax '@command_fc', which means that the function can only have the default parameters: source handle and event-data. When you define the function 'command_fc', you are trying to use the second argument as 'handles', which appears to be custom argument and can not be mapped to event-data object (which is supposed to be there).

If you want to have additional arguments in your callback methods, you need to define them. Refer to the following link for more information on the syntax and the concept.

https://www.mathworks.com/help/matlab/creating_plots/callback-definition.html#buhztrr-8