Setting ButtonDownFcn disables default datatip functionality on hover

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Ahmad Khaled 2020-4-15

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https://ww2.mathworks.cn/matlabcentral/answers/518097-setting-buttondownfcn-disables-default-datatip-functionality-on-hover

评论： Ahmad Khaled 2022-6-17

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Hello,

Matlab nicely has the builtin feature of viewing the data tips when the mosue hovers on a point in a plot.

However, when I try to set the ButtonDownFcn of the plot, this default data tip functionality is disabled.

Is there a way to have both: View data points on hover and fire a function when the plot is clicked?

Example:

figure()
a=plot(1:10,1:10)
%Figure now shows data tips perfectly
set(a,'HitTest', 'on', 'ButtonDownFcn',@(varargin)disp('Anything'))
%Running the last line disables the datatips on hovering to enable firing the disp function when plot is clicked

Many thanks!

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Michael Hotto 2021-12-14

编辑：Michael Hotto 2021-12-14

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I have the same issue, adding a simple ButtonDownFcn disables default mouse hover highlighting and datatips.

When comparing s1 to s2, the only property difference I could identify was the ButtonDownFcn field which is what I would expect.

Johannes's answer before me makes it so you have to physically deselect "Data Tips" in the figure interactivity menu in order for a button down function to work on a selected point. You will also have to deselect "Data Tips" if you want any of the other figure interactivities to work.

Example:

function interactive_sin()
% tested on MATLAB 2021b
X = 0:pi/100:2*pi;
Y = sin(X);
h = figure();
%s1 = scatter(X,Y,'filled'); -> has default MATLAB hover highlighting & datatips
s2 = scatter(X,Y,'filled','ButtonDownFcn',{@selected_pt,h}); % -> does NOT have default MATLAB hover highlighting & datatips
end
% -------------------------------------------------------------------------
function selected_pt(src,event,h)
pt = event.IntersectionPoint;
fprintf('You selected pt: [%0.2f %0.2f]\n',pt(1),pt(2))
% do more stuff with selected pt here but removed from this quick example for simplicity:
%
%
%
end