import fastplotlib as fpl
import numpy as np

fig = fpl.Figure((3, 1))
sels = list()

for subplot in fig:
    lg = subplot.add_line(np.sin(np.linspace(0, np.pi * 10, 100)))
    sel = lg.add_linear_selector()
    sels.append(sel)


# create event handler and just add it to all graphics
# don't need to worry worry when event graphs have cycles
def set_selection(ev):
    for sel in sels:
        sel.selection = ev.info["value"]

for sel in sels:
    sel.add_event_handler(set_selection, "selection")

fig.show(maintain_aspect=False)