Simple Problem - Message Box Function
显示 更早的评论
I have no experience with GUI programing in Matlab. I've written a very simple callback function to display some text when a message box is closed. The text never shows, so I think the callback function is not being called. Can you please take a look and tell me what I'm doing wrong?
Cheers, Josh
function messageBox
h1=msgbox('Message Display','','none','non-modal');
set(h1,'CloseRequestFcn',@closeMsg);
function closeMsg(src,eventdata)
disp('working')
end
waitfor(h1)
end
采纳的回答
Matt Fig
2011-5-4
function messageBox
h1=msgbox('Message Display','','none','non-modal');
set(h1,'Deletefcn',@closeMsg);
function closeMsg(src,eventdata)
disp('working')
end
end
If you look at the code for MSGBOX, you will see that pressing the button calls DELETE, which does not use the closerequestfcn. You can see this in the doc for CLOSE (but not in the doc for DELETE?).
3 个评论
Matt Tearle
2011-5-4
To elaborate: the action is actually a callback for the pushbutton, which is a child of the message box window. Try this to see what's going on:
h1=msgbox('Message Display','','none','non-modal');
h = findobj(h1,'type','uicontrol');
get(h,'Callback')
So you can either change that callback (set(h,'Callback',@closeMsg)) or, as Matt Fig says, change the Deletefcn callback for the window, which is invoked by the Callback callback of the uicontrol (yes, that sentence does make sense...!).
Not sure if that clarified anything at all!
Matt Tearle
2011-5-4
BTW, notice that if you click the "x" close button on the window (top right corner), your code actually works. *That* is calling the CloseRequestFcn callback.
Matt Fig
2011-5-4
*That* is calling the CloseRequestFcn callback.
Not quite like the OP is imagining, I would guess.
(Try it out...)
更多回答（2 个）
Sean de Wolski
2011-5-4
0 个投票
You're modifying the closerequestfcn not the callback function for when it's pushed. If you click on the x like you're trying to exit the message box and then click on the okay button it will display 'working'.
3 个评论
Matt Fig
2011-5-4
But that is not the problem, see the end of my post for explanation...
Sean de Wolski
2011-5-4
But not if you click the X in the corner! If you click the X in the corner it does call the closerequestfcn and once the waitfor() is taken care of by deleting (by clicking the okay button) it will execute the closerequestfcn.
Matt Fig
2011-5-4
True enough, see my comment above on my answer. BTW, I was commenting (on your answer) on your previously posted code, not on your newer explanation, which is perfectly fine.
类别
在 帮助中心 和 File Exchange 中查找有关 Entering Commands 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
