Make Parameters work with DynamicMap just as bound functions.

[MarcSkovMadsen]

Motivated by holoviz/panel#6543 where Philipp states this should absolute be supported.

I.e. pn.pane.HoloViews(hv.DynamicMap(watch_view.param.plot)) in the below should work just as if plot was a bound function.

import panel as pn
import param
import pandas as pd
import numpy as np
import hvplot.pandas
import holoviews as hv

pn.extension("plotly")


class Data(param.Parameterized):
    value = param.DataFrame()

    submit = param.Event()

    @pn.depends("submit", watch=True, on_init=True)
    def _update_value(self):
        x = np.random.rand(10)
        y = np.random.rand(10)
        self.value = pd.DataFrame({"x": x, "y": y})


class WatchStorage(param.Parameterized):
    data = param.ClassSelector(class_=Data, allow_refs=True)

    plot = param.Parameter()

    @pn.depends("data.value", watch=True, on_init=True)
    def _update_plot(self):
        self.plot = self.data.value.hvplot(x='x', y='y', title='Scatter Plot')


data = Data()

watch_view = WatchStorage(data=data)


pn.Column(
    pn.Row(
        pn.pane.HoloViews(hv.DynamicMap(watch_view.param.plot))
    ),
).servable()

Currently it does not work

[philippjfr]

Note this isn't about parameters specifically but all valid references including reactive expressions.