How to update GUI in matlab App during a callback

Question

Timo 2022-4-21

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1701530-how-to-update-gui-in-matlab-app-during-a-callback

评论： Hiro Yoshino 2022-4-21

采纳的回答： Bruno Luong

在 MATLAB Online 中打开

Hello

Environement: matlab R2021b and R2021a, windows 10

I would like to change the color of a button during a callback in an Matlab App created with the App Designer.

% Button pushed function: LoadButton
function LoadButtonPushed(app, event)
set(app.LoadButton,'BackgroundColor',[1, 0, 0])%set color of the button to red
%... do things..
set(app.LoadButton,'BackgroundColor',[0, 1, 0])%set color of the button to green            
end

I see only the green button in the end, but not the red button while the callback function is running. It seems that there is something like a refresh or update, somthine like guidata in GUIDE is needed.

How do I update the user interface inbetween?

Many thanks and best wishes

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

Bruno Luong 2022-4-21

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1701530-how-to-update-gui-in-matlab-app-during-a-callback#answer_947405

在 MATLAB Online 中打开

Try to force refresh with drawnow

% Button pushed function: LoadButton
function LoadButtonPushed(app, event)
set(app.LoadButton,'BackgroundColor',[1, 0, 0])%set color of the button to red
drawnow
%... do things..
set(app.LoadButton,'BackgroundColor',[0, 1, 0])%set color of the button to green            
drawnow
end

4 个评论
显示 2更早的评论隐藏 2更早的评论

Timo 2022-4-21

编辑：Timo 2022-4-21

Works perfectly. Many thanks Bruno!

Hiro Yoshino 2022-4-21

Wow it's great ☺

请先登录，再进行评论。

Answer 2

Hiro Yoshino 2022-4-21

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1701530-how-to-update-gui-in-matlab-app-during-a-callback#answer_947400

Please see here: https://www.mathworks.com/help/matlab/creating_guis/write-callbacks-for-gui-in-app-designer.html

the changes made by valuChanged callback functions are reflected later. If you want to see the changes dinamically, you should use valuChanging callback functions.