UI-Components: Cards with embedded charts (and other cool cards)

Dash Python
,
1

Wanted to start a thread similar to the Sidebar thread @AnnMarieW began.

Cards are a pretty ubiquitous UI component so i thought i’d share one i figured out. If you have others to share add them on.

This one embeds a “spark chart” onto the card itself so alongside the KPI you can get a visualization of that KPI across a short period of time.

image

Minimal example:

from dash import html, Dash, dcc, Input, Output, callback
import dash_mantine_components as dmc
import pandas as pd
import plotly.express as px
from datetime import datetime

app = Dash(__name__)

app.layout = dmc.Grid([
    dmc.Col([
        dmc.Paper([
            dcc.Location(id='url', refresh=False),
            dmc.Group([
                html.Div([
                    dmc.Title(id='tot-inv-title', order=5),
                    dmc.Title(id='tot-inv', order=1)
                ], style={'position': 'relative', 'z-index': '999'}),
                dcc.Graph(
                    id='tot-spark',
                    config={
                        'displayModeBar': False,
                        'staticPlot': True
                    },
                    responsive=True,
                    style={'height': 60, 'margin': '-1rem'})
            ], direction='column', grow=True)
        ], shadow="xl", p="md", withBorder=True, style={'margin-bottom': "1rem"})
    ], span=6)
])


@callback(
    [Output('tot-inv', 'children'),
     Output('tot-spark', 'figure'),
     Output('tot-inv-title', 'children')],
    Input('url', 'pathname')
)
def update_page(url):

    area_df = pd.DataFrame({
        'x': [20, 18, 489, 675, 1776],
        'y': [4, 25, 281, 600, 1900]
    }, index=[1990, 1997, 2003, 2009, 2014])

    fig = px.area(
        area_df,
        x="x", y="y",
        template='simple_white',
        log_y=True
    )

    fig.update_yaxes(visible=False),
    fig.update_xaxes(visible=False),
    fig.update_traces(
        line={'color': 'rgba(31, 119, 180, 0.2)'},
        fillcolor='rgba(31, 119, 180, 0.2)'
    ),
    fig.update_layout(
        margin={'t': 0, 'l': 0, 'b': 0, 'r': 0}
    )

    kpi_val = f'42'

    now = datetime.now()
    tot_inv_title = now.strftime('%m/%d/%Y')

    return kpi_val, fig, tot_inv_title


if __name__ == '__main__':
    app.run_server(
        host='0.0.0.0',
        port=8050,
        debug=True,
        dev_tools_props_check=True
    )
7 Likes
2

@tphil10 That looks awesome - thanks for posting! And for those who missed it from the original thread, here’s how the card looks in the app: The Bourbonhuntr

image
image1439×689 106 KB

3 Likes
3

Ok, Here’s another example. I hope it qualifies as a “cool card” :sunglasses:

It’s common to display KPIs in a group of cards. This app creates the cards in a loop. It’s styled dynamically based on the data using Bootstrap Utility classes and icons. It’s updated with “live data” every 10 seconds (to stay within the API’s free tier

image
image1027×269 27.3 KB 

import dash
from dash import Dash, dcc, html, Input, Output
import dash_bootstrap_components as dbc
import requests

app = Dash(__name__, external_stylesheets=[dbc.themes.SUPERHERO, dbc.icons.BOOTSTRAP])

coins = ["bitcoin", "ethereum", "binancecoin", "ripple"]
interval = 6000 # update frequency - adjust to keep within free tier
api_url = "https://api.coingecko.com/api/v3/coins/markets?vs_currency=usd"


def get_data():
    try:
        response = requests.get(api_url, timeout=1)
        return response.json()
    except requests.exceptions.RequestException as e:
        print(e)


def make_card(coin):
    change = coin["price_change_percentage_24h"]
    price = coin["current_price"]
    color = "danger" if change < 0 else "success"
    icon = "bi bi-arrow-down" if change < 0 else "bi bi-arrow-up"
    return dbc.Card(
        html.Div(
            [
                html.H4(
                    [
                        html.Img(src=coin["image"], height=35, className="me-1"),
                        coin["name"],
                    ]
                ),
                html.H4(f"${price:,}"),
                html.H5(
                    [f"{round(change, 2)}%", html.I(className=icon), " 24hr"],
                    className=f"text-{color}",
                ),
            ],
            className=f"border-{color} border-start border-5",
        ),
        className="text-center text-nowrap my-2 p-2",
    )


mention = html.A(
    "Data from CoinGecko", href="https://www.coingecko.com/en/api", className="small"
)
interval = dcc.Interval(interval=interval)
cards = html.Div()
app.layout = dbc.Container([interval, cards, mention], className="my-5")


@app.callback(Output(cards, "children"), Input(interval, "n_intervals"))
def update_cards(_):
    coin_data = get_data()
    if coin_data is None or type(coin_data) is dict:
        return dash.no_update
    # make a list of cards with updated prices
    coin_cards = []
    updated = None
    for coin in coin_data:
        if coin["id"] in coins:
            updated = coin.get("last_updated")
            coin_cards.append(make_card(coin))

    # make the card layout
    card_layout = [
        dbc.Row([dbc.Col(card, md=3) for card in coin_cards]),
        dbc.Row(dbc.Col(f"Last Updated {updated}")),
    ]
    return card_layout


if __name__ == "__main__":
    app.run_server(debug=True)
3 Likes
4

Ooooo @AnnMarieW I might have a use for this in another app of mine! Awesome!

1 Like