Updating Handles in WindowKeyPressFcn

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Matt
Matt 2013-1-2
评论： PIEASIAN ISB 2019-8-27
I'm trying to make a panel visible when the user presses the 'a' key. However the handles structure is not updating like I want it to.
function figure1_WindowKeyPressFcn(hObject , eventdata , handles)
switch eventdata.Key
case 'a'
set(handles.mypanel,'visible','on');
end
guidata(hObject,handles);
Any ideas why this is not causing the panel to become visible? Or a workaround?
Thanks, Matt
  1 个评论
PIEASIAN ISB
PIEASIAN ISB 2019-8-27
Hi, i am calling a callback function by using uimenu. Function name movx. In movx i define a windowkeypressfunc key1. I press desired key and perform the task upto this its ok. But how disable this windowkeypressfunc. I want disable this windowkeypressfunc and when i call it back it should be enabled. Kindly any suggestions help Thanks

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回答（3 个）

Walter Roberson
Walter Roberson 2013-1-2
编辑：Walter Roberson 2013-1-2
Try adding a
drawnow()
after the set()
Do you want the panel to become visible on "a" or on "m" ? You coded "m"
Note: you do not need to guidata() in the case you show.
  2 个评论
Matt
Matt 2013-1-2
Sorry, it should be an 'a'. drawnow() did not work either. I use several set and get statements in callbacks and custom functions throughout the script. It is only in the WindowKeyPressFcn in which this became a problem. Any other suggestions? Thanks for your time.
Walter Roberson
Walter Roberson 2013-1-2
Can you confirm that the function is being activated? Such as by putting
disp(eventdata)
just under the function header?

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Sean de Wolski
Sean de Wolski 2013-1-2
  • Stick a break point on the set() line. What does:
ishandle(handles.mypanel)
return?
  • Are you sure the panel exists and that its stacking order is above another panel that it might be hiding behind?
doc uistack %for more info
Jan
Jan 2013-1-2
I do not see the connection between the code and updating the handles struct. The handles struct is not modified at all in the code, therefore the guidata(hObject, handles) command is useless here. But there might be another problem, see FAQ: Incomplete handles struct in callbacks:
function figure1_WindowKeyPressFcn(hObject , eventdata , handles)
...
guidata(hObject,handles);
The handles struct from the input arguments is not the current version. If this causes your problems, use this:
function figure1_WindowKeyPressFcn(hObject , eventdata , handles)
handles = guidata(hObject); % Current version!
handles.myData = rand(5); % Any changes
guidata(hObject, handles); % Store updated struct

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