How to get cursor info in UIaxes

Question

Junfeng Liang 2022-4-20

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1701160-how-to-get-cursor-info-in-uiaxes

回答： chrisw23 2022-4-21

Hi

I am trying to duplicate the code below in the app designer. This code return the point selected with the mouse from a plot in the figure. I try to run it in the app designer. But I don't know how to pass the handle of my UIaxes to "dcm_obj"

x = linspace(0,10,150);
y = cos(5*x);
fig = figure;
plot(x,y,'Color',[0,0.7,0.9])
title('2-D Line Plot')
xlabel('x')
ylabel('cos(5x)')
% Enable data cursor mode
datacursormode on
dcm_obj = datacursormode(fig);
% Set update function
set(dcm_obj,'UpdateFcn',@myupdatefcn)
% Wait while the user to click
disp('Click line to display a data tip, then press "Return"')
pause 
% Export cursor to workspace
info_struct = getCursorInfo(dcm_obj);
if isfield(info_struct, 'Position')
    disp('Clicked positioin is')
    disp(info_struct.Position)
end
function output_txt = myupdatefcn(~,event_obj)
% ~            Currently not used (empty)
% event_obj    Object containing event data structure
% output_txt   Data cursor text
pos = get(event_obj, 'Position');
output_txt = {['x: ' num2str(pos(1))], ['y: ' num2str(pos(2))]};
end