Can the uiconfirm 'Cancel' response be used to directly stop the current callback?

Question

Allen 2021-7-12

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/876903-can-the-uiconfirm-cancel-response-be-used-to-directly-stop-the-current-callback

评论： Walter Roberson 2021-7-12

I currently use the questdlg to solicit a user response, paired with an if-statement to stop callback execution. Below is a short example of the code I typically use.

% Prompt the user to respond on how to proceed.
qans = questdlg('Do you wish to proceed?','Confirm to Proceed','Yes','No','Yes'); % Default button set to 'Yes'
% End callback function if the close dialog (X) or 'No' buttons are pushed
if isempty(qans) || strcmp(qans,'No')
    return
end
% Else continue with the remainder of the callback function

However, uiconfirm appears to allow the user to assign a CloseFcn for 'Cancel' responses, which includes the close dialog box. I would like to be able to assign return as the CloseFcn, but this is not directly allowed. The following are my attempts at this.

% Attempted to use the @mycallback function as shown in the Help
% documentation. This does not immediately terminate the callback.
qans = uiconfirm(app.UIFigure,"Do you wish to proceed?","Confirm to Proceed", ...
    "Options",["Yes","Cancel"],"DefaultOption",2,"CancelOption",2,"CloseFcn",@mycallback);
% Attempted to use return and @return directly within uiconfirm, but this
% is not a valid use of return.
qans = uiconfirm(app.UIFigure,"Do you wish to proceed?","Confirm to Proceed", ...
    "Options",["Yes","Cancel"],"DefaultOption",2,"CancelOption",2,"CloseFcn",return);

Is there another way to do this firectly within uiconfirm?

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

Walter Roberson 2021-7-12

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/876903-can-the-uiconfirm-cancel-response-be-used-to-directly-stop-the-current-callback#answer_745123

No. There is no way to do that.

2 个评论
显示无隐藏无

Allen 2021-7-12

Walter,

Thanks for the response. I will just continue using my current method.

Walter Roberson 2021-7-12

Except for a few callbacks that act as filters constraining ROI positions or zooming positions, all callbacks in MATLAB are executed in the base workspace (if they are not function handles) or as-if invoked from the top level. Their caller is not the function that invoked uiconfirm()

请先登录，再进行评论。