How to interact with plot using keyboard arros? - plot

Question

My interactive plot (topoplot) reacts to mouse signals, but how to make it reacting to keyboard signals?
Here is my code:
f = Figure()
xs = 1:1:193 #range(-30, 120, length = size(dat_e, 2))
sg = SliderGrid(f[2, 1],
(label="time", range=xs, format = "{:d} ms", startvalue = 100),
)
time = sg.sliders[1].value
str = lift(t -> "[$t ms]", time)
topo_slice = lift((t, data) -> mean(data[1:30, t, :], dims=2)[:,1], time, dat_e)
topo_axis = Axis(f[1, 1], aspect = DataAspect())
topo = eeg_topoplot!(topo_axis, topo_slice,
raw.ch_names[1:30];
positions=pos, # produced automatically from ch_names
label_text=true) # aspect ratio, correlation of height and width
text!(topo_axis, 1, 1, text = str, align = (:center, :center))
#topo_slice = lift((t, data) -> data[:, :, t], time, topo)
xlims!(-0.2, 1.1)
ylims!(-0.2, 1.2)
hidedecorations!(topo_axis)
hidespines!(topo_axis)
f
There is an official instruction https://docs.juliahub.com/AbstractPlotting/6fydZ/0.12.11/interaction.html, but as usual with Julia documentations, there is no example and I have no idea how implement it in my code.
How my plot looks like:

Answer 1

Expanding on the answer from before:
T = 10
pts = range(-1, 1, length=100)
ts = reshape(1:T, 1, 1, :)
topo = cos.(pts) .+ cos.(ts .* pts')
fig = Figure()
ax = Axis(fig[1, 1])
sg = SliderGrid(fig[2,1],
(label="time", range=1:T))
time = sg.sliders[1].value
str = lift(t -> "[$t ms]", time)
text!(ax, str)
topo_slice = lift((t, data) -> data[:, :, t], time, topo)
# decrement/increment slider with left/right keys
on(events(fig).keyboardbutton) do btn
if btn.action in (Keyboard.press, Keyboard.repeat)
if btn.key == Keyboard.left
set_close_to!(sg.sliders[1], time[] - 1)
elseif btn.key == Keyboard.right
set_close_to!(sg.sliders[1], time[] + 1)
end
end
end
contour!(ax, topo_slice)
hidedecorations!(ax)
hidespines!(ax)
fig