How can I continuously get the mouse coordinates?

Question

Jordan Burnett 2017-1-29

0
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https://ww2.mathworks.cn/matlabcentral/answers/322434-how-can-i-continuously-get-the-mouse-coordinates

回答： Walter Roberson 2017-1-29

I'm trying to track the position of the mouse as it scrolls across the figure, so I need the coordinates relative to that figure's axes. The best I have so far is this:

    % code
    function [x, y] = mouseMove(hobject,eventdata)
        C = get(gca,'currentpoint');
        x = C(1);
        y = C(2);
    end
    axis equal;
    axis([-8,8,-7,18]);
    hold on;
    set(gcf,'WindowButtonMotionFcn',@mouseMove);
    while 1
        loc = get(gca, 'CurrentPoint');
        plot(loc(1), loc(2), 'r.', 'markersize', 15);
        pause(.03);
    end

However, even this only plots according to the mouse's x position (it plots a straight line, with both the x and y values of that line being equal to the mouse's relative x position). So I'm halfway there, but I'm not sure why the y value is equal to the x value all the time.