How to indicate that GUI is busy running?
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I would like to know how to indicate in my GUI that MATLAB is currently busy running some piece of code (e.g. a long computation). Currently, there is no indication in the GUI that the code is running, causing the user to wonder whether it is working or just not responsive.
采纳的回答
Titus Edelhofer
2011-7-12
Hi Kyle,
two typical main ways to do this: in your callback do
set(handles.figure1, 'pointer', 'watch')
drawnow;
% your computation
set(handles.figure1, 'pointer', 'arrow')
This shows the hour glass during the callback. If the callback indeed takes longer, use function "waitbar" to indicate progress ...
Titus
4 个评论
Kyle
2011-7-12
编辑：Walter Roberson
2020-8-31
Walter Roberson
2011-7-12
编辑：Walter Roberson
2020-7-8
The "% your computation" comment is the place you would put the code that will keep MATLAB occupied.
I would use slightly different code, though:
oldpointer = get(handles.figure1, 'pointer');
set(handles.figure1, 'pointer', 'watch')
drawnow;
% your computation goes here
set(handles.figure1, 'pointer', oldpointer)
That is, I prefer not to assume that the pointer was 'arrow' before.
Aash
2018-5-4
I tried doing this and it is giving this error Error using matlab.ui.control.UIControl/set There is no pointer property on the UIControl class.
Error in Control>error_Callback (line 435) set(handles.error, 'pointer', 'watch')
What does it mean?
Walter Roberson
2020-7-8
You can only set the Pointer for a figure, not for a uicontrol.
fig = ancestor(handles.error, 'figure');
oldpointer = get(fig, 'pointer');
set(fig, 'pointer', 'watch');
drawnow;
% your computation goes here
set(fig, 'pointer', oldpointer)
更多回答（3 个）
Kyle
2011-7-12
0 个投票
1 个评论
Sean de Wolski
2011-7-12
You have to manually update waitbar - look at the example in
doc waitbar
Aash
2018-5-9
My pointer is changing to the loading while computation but it isnt coming back to the orignal arrow after the code stops executing. Here is my code
oldpointer = get(handles.figure1, 'pointer');
set(handles.figure1, 'pointer', 'watch')
drawnow;
%code that runs
set(handles.figure1, 'pointer', oldpointer)
2 个评论
Ahmer Shahid
2019-1-13
How can I use this in app designer?
it's giving me error.
Error using matlab.ui.Figure/set
Functionality not supported with figures created with the uifigure function. For more information, see Graphics Support in App Designer.
syed Rahim
2020-6-12
isn't handles a GUIDE only graphics structure. For APP designer it should be App.Figure1.
Jan Siegmund
2020-7-8
编辑：Jan Siegmund
2020-8-31
0 个投票
Users that looked for a waitbar style solution should have a look at https://de.mathworks.com/help/matlab/ref/uiprogressdlg.html which is basically waitbar but with an up to date look.
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