Datatip issue

I have an image and want to create a datatip. Then take its position. My problem is how do I 'wait' for the datatip to be create before using its position as a variable.

global X; %constant image, eg. imread('camera.tif');
datacursormode on;
i = cursor_info.Position;
k = i(1,1);
j = i(1,2);
a = X(k,:);
u = X(:,:);

So the issue is i = cursor_info.Position throws an error because it is trying to execute before it is created. How do i pause or hold the program until the datatip is export and named 'cursor_info'? or is there another method?

Thanks, Colm

Answer 1

[Sean de Wolski]

perhaps waitfor()?

Or a drawnow to force a flush of the graphics queue should work too.

[Colm]

Neither of those work.

I basically want the code to pause until a datatip is created.

[Sean de Wolski]

And then get its position immediately? Its position immediately will not exist. If you want to wait until the user clicks then it sounds like you want to modify its updatefcn.

I = imread('cameraman.tif');

datacursormode on;

Hfig = figure;

Hax = axes;

imshow(I,'parent',Hax);

Hdcm = datacursormode(Hfig);

datacursormode on;

drawnow;

info = getCursorInfo(Hdcm);