DataCursormode - Selecting Points on Graph

I attempted to implement this idea:

http://www.mathworks.com/support/solutions/en/data/1-143T59/

However, suppose I want to limit the mouse clicks to a variable

function pick_Callback(hObject, eventdata, handles)
pick = handles.pick %Pick could be any random number
dcm_obj = datacursormode(figure (8));
set(dcm_obj,'DisplayStyle','datatip',...
    'SnapToDataVertex','off','Enable','on')
c_info = getCursorInfo(dcm_obj);

if(numel(c_info)==numel(pick))
    set(dcm_obj,'Enable','off');
end

For some reason, it allows me to continue selecting points. I want it to stop at numel(pick).

Answer 1

[T]

Or suppose I use

[x,y] = ginput(number)

Suppose further that a button initiates this action but the figure appears in a separate window.