Py.Cafe

awesome.panel.org/

reflex-dashboard

A Panel dashboard similar to the one from Reflex dashboard tutorial

DocsPricing
  • app.py
  • panel-dashboard.gif
  • requirements.txt
app.py
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"""Basic App

The purpose is to enable comparision of Panel and Reflex Dashboards.

See https://reflex.dev/docs/getting-started/dashboard-tutorial/.
"""
import panel as pn
import param
import pandas as pd
from panel_modal import Modal

ACCENT = "#805AD5"

pn.extension(
    "vizzu",
    "tabulator",
    "modal",
    notifications=True,
    design="material",
    sizing_mode="stretch_width",
    global_css=[f":root {{ --design-primary-color: {ACCENT}; }}"],
)


class User(param.Parameterized):
    """User Model."""

    name = param.String(default="")
    email = param.String(default="")
    gender = param.Selector(objects=["Female", "Male"])


class State(param.Parameterized):
    """Application State."""

    users = param.List(
        default=[
            User(name="Danilo Sousa", email="danilo@panel.org", gender="Male"),
            User(name="Zahra Ambessa", email="zahra@panel.org", gender="Female"),
        ],
        item_type=User,
    )

    user_data = param.DataFrame()
    gender_data = param.DataFrame()

    def add_user(self, name, email, gender):
        """Add a user and update the data."""
        new_user = User(name=name, email=email, gender=gender)
        self.users = self.users + [new_user]

    @param.depends("users", watch=True, on_init=True)
    def _transform_to_table_data(self):
        """Transform user gender group data into a format suitable for visualization in graphs."""
        data = [
            {"Name": user.name, "Email": user.email, "Gender": user.gender} for user in self.users
        ]
        self.user_data = pd.DataFrame(data).sort_values("Name").reset_index()

    @param.depends("users", watch=True, on_init=True)
    def _transform_to_plot_data(self):
        """Transform user gender group data into a format suitable for visualization in graphs."""
        gender_counts = (
            pd.DataFrame([{"gender": user.gender} for user in self.users])
            .value_counts()
            .reset_index(name="count")
        )
        gender_counts.columns = ["Name", "Count"]
        self.gender_data = gender_counts


state = State()

# Create the Add User Form
new_user = User(name="")
cancel_button = pn.widgets.Button(name="Cancel")
submit_button = pn.widgets.Button(name="Submit", button_type="primary")
message = pn.pane.Alert("Please fill out all fields!", visible=False, alert_type="danger")
add_user_form = pn.Column(
    "## Add New User\n\nFill the form with the user's info.",
    message,
    pn.widgets.TextInput.from_param(new_user.param.name, placeholder="User Name"),
    pn.widgets.TextInput.from_param(new_user.param.email, placeholder="name@panel.org"),
    pn.widgets.Select.from_param(new_user.param.gender),
    pn.Row(cancel_button, submit_button),
)

modal = Modal(add_user_form, width=600, sizing_mode="fixed")


def open_modal(e):
    modal.open = True


add_user_button = pn.widgets.Button(
    name="Add User",
    icon="plus",
    button_type="primary",
    width=150,
    align="center",
    on_click=open_modal,
)
header = pn.pane.Markdown(
    "# Panel Dashboard", align="center", sizing_mode="fixed", styles={"font-size": "24px", "margin-left": "40px"}
)
user_table = pn.widgets.Tabulator(
    state.param.user_data,
    theme="materialize",
    layout="fit_columns",
    show_index=False,
    disabled=True,
    sortable=False,
)
gender_plot = pn.pane.Vizzu(
    state.param.gender_data,
    config={"geometry": "rectangle", "x": "Name", "y": "Count"},
    duration=400,
    style={"plot": {"marker": {"colorPalette": ACCENT}}},
    height=400,
    sizing_mode="stretch_width",
    tooltip=True,
)
credits_text = "Credits: [Reflex Dashboard Tutorial](https://reflex.dev/docs/getting-started/dashboard-tutorial/)"


@param.depends(submit_button.param.value, watch=True)
def submit(_):
    name_input = new_user.name
    email_input = new_user.email
    gender_input = new_user.gender
    if name_input and email_input and gender_input:
        state.add_user(name=name_input, email=email_input, gender=gender_input)
        new_user.name = ""
        new_user.email = ""
        new_user.gender = "Female"
        modal.close = True
        message.visible = False
        pn.state.notifications.send(
            "User added successfully!",
            duration=2000,
            background=ACCENT,
            icon='<i class="fas fa-burn"></i>',
        )
    else:
        message.visible = True


@param.depends(cancel_button.param.value, watch=True)
def close_modal(_):
    modal.close = True


pn.Column(
    modal,
    header,
    add_user_button,
    user_table,
    gender_plot,
    credits_text,
    max_width=800,
    align="center",
    styles={"margin": "auto"},
).servable()