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Display in a uicontextmenu the coordinates of clicked point in a uiimage

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Vlad Atanasiu
Vlad Atanasiu on 1 Oct 2020
Edited: Vlad Atanasiu on 2 Oct 2020
How do you display in a uicontextmenu the coordinates of the point in a uiimage of a uifigure clicked by the user while opening the context menu? Here is the code template. It shows how you can dynamically change the content of a uicontextmenu, but fails to capture the coordinates of the clicked point. Note that the coordinates of the clicked point are given by the property CurrentPoint of uiaxes and uifigure. The uiaxes information is not available since there are no axes, having created the image with the uiimage function, and the property is zero for uifigure.
function menucoordinates
% display coordinates of clicked point of uiimage in uicontextmenu
% ------------
% Run the function and right-click the image to show the contextual menu
% ------------
fig = uifigure;
% create context menu
cm = uicontextmenu(fig);
cm.ContextMenuOpeningFcn = @onRightClick;
m = uimenu(cm,'Text','');
% create image
im = uiimage(fig);
im.ImageSource = 'membrane.png';
im.ContextMenu = cm;
function onRightClick(src,event)
% update the menu text
% get coordinates of clicked point - HOW?
% ...
% clicked coordinates from uifigure are zero
disp(fig.CurrentPoint)
% dummy values
x = 1;
y = 1;
% display coordinates
m.Text = ['x ',num2str(x),', y ',num2str(y)];
end
end

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