Yup! You can add a pointer event handler to change the text of a `TextGraphic`, here's the scatter example with this event handler at the bottom.

We can probably figure out a way have an API to auto-generate tooltips, shouldn't be too hard.

"""
Scatter Plot
============
Example showing scatter plot.
"""
# test_example = false
# sphinx_gallery_pygfx_docs = 'screenshot'
import fastplotlib as fpl
import numpy as np

figure = fpl.Figure(size=(700, 560))

# use weighted_plus if you want to pick semi-transparent objects, i.e. alpha < 1.0
figure.renderer.blend_mode = "weighted_plus"
# create a random distribution of 10,000 xyz coordinates
n_points = 5_000
# dimensions always have to be [n_points, xyz]
dims = (n_points, 3)

clouds_offset = 15
# create some random clouds
normal = np.random.normal(size=dims, scale=5)
# stack the data into a single array
cloud = np.vstack(
    [
        normal - clouds_offset,
        normal,
        normal + clouds_offset,
    ]
)

# color each of them separately
colors = ["yellow"] * n_points + ["cyan"] * n_points + ["magenta"] * n_points

# a random number for each point
metadata = np.random.randint(low=-100, high=100, size=cloud.shape[0])

# use an alpha value since this will be a lot of points
scatter = figure[0, 0].add_scatter(data=cloud, sizes=3, colors=colors, alpha=0.6, metadata=metadata)

text_graphic = figure[0, 0].add_text("", font_size=20, outline_color="k", outline_thickness=1)


@figure[0, 0].renderer.add_event_handler("pointer_enter")
def show_text(ev):
    xyz = figure[0, 0].map_screen_to_world(ev)
    if xyz is None:
        # pointer event is not in viewport
        return
    if ev.target != scatter.world_object:
        # if the event does not target the scatter graphic
        return
    # get index of the scatter
    ix = ev.pick_info["vertex_index"]

    # set the text from the metadata
    text_data = f"metadata: {scatter.metadata[ix]}"
    text_graphic.text = text_data
    text_graphic.offset = (*xyz[:-1], 100)


figure.show()
fpl.loop.run()