Clear Filters
Clear Filters

How to show the position of your mouse in a GUI that has two Axes?

5 views (last 30 days)
Dear all,
I have a GUI that has two axes, Main_Axes and Side_Axes.
Now I want when mouse is over a point in the Main_Axes, it will show the same position of the mouse in the Side_Axes.
So I made a function that I called 'mouseMove', that start * the mouse position
function mouseMove (object, eventdata)
C = get (gca, 'CurrentPoint');
X = C(1,1);
Y = C(1,2);
I = getimage;
hold on
plot(X, Y, 'y*')
hold off
Now in the callback I add this code
imshow(I) % to show 'I' in the Main_Axes
set (gca, 'WindowButtonMotionFcn', @mouseMove);
This makes the yellow star always appear in the Main_Axes, but it should appear in the Side_Axes.
Any idea how to fix that?

Accepted Answer

Walter Roberson
Walter Roberson on 9 Feb 2016
set (gca, 'WindowButtonMotionFcn', {@mouseMove, handles});
function mouseMove(object, eventdata, handles)
if ~isfield(handles, 'side_pointer') || ~ishandle(handles.side_pointer)
pointersize = 30;
handles.side_pointer = scatter(nan, nan, pointersize, 'y', 'Marker', '*');
guidata(object, handles);
C = get(handles.Main_Axes, 'CurrentPoint');
x = C(1,1); y = C(1,2);
%move the cursor
set(handles.side_pointer, 'XData', x, 'YData', y);
%zoom around the cursor
zoomwidth = 64;
xleft = max(0, x-zoomwidth/2);
ybot = max(0, y-zoomwidth/2);
set(handles.Side_Axes, 'XLim', [xleft xleft+zoomwidth], 'YLim', [ybot ybot+zoomwidth]);
Adam Danz
Adam Danz on 16 Jun 2020
If I'm not mistaken, I think that first line should be
set(gcf, . . . )
WindowButtonMotionFcn is a figure property.

Sign in to comment.

More Answers (2)

John BG
John BG on 8 Feb 2016
Hi Meshoo
may be you can modify GetMousePosition.m to achive
'when mouse is over a point in the Main_Axes, it will show the same position of the mouse in the Side_Axes.'
what is the purpose of doing so?
  1 Comment
Meshooo on 9 Feb 2016
Thank you for the link. I didn't explain the purpose from that because I don't want to make it more complicated. So the idea is to show a zoom in the Side_Axes of the same point where the mouse is over in the Main_Axes. This will help the user to see more details in the Side_Axes.
Do you know any one tried to do similar thing?

Sign in to comment.

Ruben Gaitan Ortiz
Ruben Gaitan Ortiz on 16 Nov 2018
I had a similar problem. Thank you!


Find more on Interactive Control and Callbacks in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!