Makie position popup along multiple axes

position_popup.jl

using Makie
using Makie.AbstractPlotting.MakieLayout


function position_popup!(
        scene, axes;
        formatter = (point::Point2f0) -> string(round.(Float64.(point), digits = 3)),
    )

    visible = Observable(false)

    poprect = Observable{FRect2D}(FRect(1, 1, 1, 1))
    textpos = Observable{Vec3f0}(Vec3f0(1, 1, 120))

    rect = poly!(
        scene,
        poprect;
        color = :white,
        strokewidth = 2,
        strokecolor = :black,
        visible = visible,
    )[end]

    translate!(rect, Vec3f0(0, 0, 100))

    textnode = Node(" ")

    text!(
        scene,
        textnode;
        textsize = 20,
        position = textpos,
        color = :blue,
        align = (:center, :center),
        raw = true,
        visible = visible
    )

    axis_scenes = getproperty.(axes, :scene)

    current_scene = scene

    lift(scene.events.mouseposition, scene.events.mousebuttons, current_scene) do mp, mb, current_scene
        # search for the axis which the mouse is over
        for axis in axes
            if Point2f0(mp) in pixelarea(axis.scene)[]
                current_scene = axis.scene
                break
            end
        end
        # update the observables
        poprect[] = FRect((mp .+ 5), 250, 40)
        textpos[] = Vec3f0((mp .+ 5 .+ (250/2, 40 / 2))..., 120)
        textnode[] = to_world(current_scene, Point2f0(mp) .- Makie.AbstractPlotting.GeometryBasics.origin(pixelarea(current_scene)[])) |> formatter

        if ispressed(scene, Mouse.left) && current_scene ∈ axis_scenes
            visible[] = true
        else
            visible[] = false
        end
    end

end

using Makie
using Makie.AbstractPlotting.MakieLayout

scene, layout = layoutscene()

layout[1:2, 1:3] = axes = LAxis[LAxis(scene; title = string(i*3 + j)) for i in 0:1, j in 1:3]

display(scene)

position_popup!(scene, axes)