glmakie row selection heatmap

glmakie_row_selection_heatmap.jl

using GLMakie


data = Observable(randn(30, 30))
lineindex = Observable(1)
linedata = @lift $data[:, $lineindex]

f, ax, hm = heatmap(data, axis = (; aspect = 1))
selectionrect = @lift Rect2f(0.5, $lineindex-0.5, size($data, 1), 1)
wireframe!(selectionrect, color = :white)
lines(f[1, 2], linedata)

register_interaction!(ax, :my_interaction) do event::MouseEvent, axis
    if event.type === MouseEventTypes.leftclick
        i = round(Int, event.data[2])
        if 1 <= i <= size(data[], 1)
            lineindex[] = i
        end
    end
end

f