make the XTickLabel mouse sensitive in UIAxes

hi

i would like to make the XTickLabel entries (or Y or Z dimension) mouse sensitive in UIAxes. pressing a mouse left on a label should callback a function.

thanks a lot !!!

mat

[Shlomi Bejerano]

works great thanks !!!

[Shlomi Bejerano]

sorry - checked it in my environment - ran your script and got:

"Functionality not supported with figures created with the uifigure function. For more information, see Graphics Support in App Designer."

what am i doing wrong?

thanks again!

mat

[Adam Danz]

It works in 2020b. I see you're using 19a so you'll need to update. The feature wasn't supported in your release.

• UIAxes properties (r2019a)
• UIAxes properties (r2020a)
• UIAxes properties (r2020b) <-- first time ButtonDownFcn is supported

[Shlomi Bejerano]

thanks again!..

so, there is no way to circumvent this in 2019a in App Designer?

[Adam Danz]

Well, you could replace the uiaxes with regular axes which support the ButtonDownFcn in 19a.

[Shlomi Bejerano]

as a last resort.. :)

thanks a lot for all your prompt replies and suggestions !!

Answer 1

[Adam Danz]

This demo uses a ButtonDownFcn function on the axes to detect when the left mouse button selects an x-tick label. The selection updates the axis title. Requires Matlab r2020b or later.

% Create demo UI Figure
fig = uifigure();
ax = uiaxes(fig);
ax.ButtonDownFcn = @axisButtonDownFcn;

function axisButtonDownFcn(ax, event)
    % Responds to mouse click on axes.  If click is above the lower y-axis
    % there is no action. If the click is on or around the x-axis ticks, 
    % the nearest tick is located. Only accepts left mouse clicks.
    
    % Only accept left mouse clicks
    if event.Button ~= 1
        return
    end
    
    % Only accepts clicks lower than min(ylim)
    if event.IntersectionPoint(2) > min(ax.YLim)
        return
    end
    
    % Get closest x-tick to the click
    [~, tickIdx] = min(abs(ax.XTick - event.IntersectionPoint(1)));
    tickSelected = ax.XTick(tickIdx);
    
    % Update axis title to indicat tick selected
    ax.Title.String = sprintf('x=%.4g selected', tickSelected);
end