PyCafe - Dash

app.py
requirements.txt
app.py
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import dash
from dash import dcc, html
import pytz
from datetime import datetime
import random
import dash.dependencies as dd

app = dash.Dash(__name__)

def get_current_time_in_timezone(tz_name):
    tz = pytz.timezone(tz_name)
    return datetime.now(tz)

timezones = {
    "New York": "America/New_York", "Amsterdam": "Europe/Amsterdam",
    "Brasilia": "America/Sao_Paulo", "Tokyo": "Asia/Tokyo",
    "London": "Europe/London", "Paris": "Europe/Paris",
    "Berlin": "Europe/Berlin", "Ottawa": "America/Toronto",
    "Moscow": "Europe/Moscow", "Canberra": "Australia/Sydney",
    "Budapest": "Europe/Budapest", "Vienna": "Europe/Vienna",
    "Madrid": "Europe/Madrid", "Brussels": "Europe/Brussels",
    "Buenos Aires": "America/Argentina/Buenos_Aires", "Washington": "America/New_York"
}

# Függvény véletlenszerű gradiens generálásához
def random_gradient():
    c1 = f'#{random.randint(0, 0xFFFFFF):06x}'
    c2 = f'#{random.randint(0, 0xFFFFFF):06x}'
    return f'linear-gradient(135deg, {c1}, {c2})'

app.layout = html.Div([
    html.H1("Current Times in World Capitals", style={'textAlign': 'center', 'color': 'white', 'padding': '20px'}),
    
    html.Div([
        dcc.Dropdown(
            id='city-dropdown',
            options=[{'label': city, 'value': city} for city in timezones.keys()],
            multi=True,
            value=['Budapest', 'Tokyo'],
            style={'width': '50%', 'margin': '0 auto', 'color': 'black'}
        )
    ], style={'padding': '20px'}),

    html.Div(id='city-cards-container', style={'display': 'flex', 'flexWrap': 'wrap', 'justifyContent': 'center', 'padding': '20px'})
], style={'backgroundColor': '#121212', 'minHeight': '100vh', 'fontFamily': 'sans-serif'})

@app.callback(
    dd.Output('city-cards-container', 'children'),
    [dd.Input('city-dropdown', 'value')]
)
def update_city_cards(selected_cities):
    if not selected_cities:
        return []
        
    city_cards = []
    for city in selected_cities:
        current_time = get_current_time_in_timezone(timezones[city])
        formatted_time = current_time.strftime('%H:%M:%S')
        date_str = current_time.strftime('%Y-%m-%d')

        city_cards.append(
            html.Div([
                html.H3(city, style={'color': 'white', 'marginBottom': '10px', 'fontSize': '20px'}),
                html.P(formatted_time, style={'fontSize': '24px', 'fontWeight': 'bold', 'color': 'white', 'margin': '0'}),
                html.P(date_str, style={'fontSize': '14px', 'color': 'rgba(255,255,255,0.8)'})
            ], style={
                'display': 'flex',
                'flexDirection': 'column',
                'justifyContent': 'center',
                'alignItems': 'center',
                'width': '180px',
                'height': '180px',
                'borderRadius': '50%',
                'background': random_gradient(), # Itt kapja meg a gradienst
                'margin': '15px',
                'boxShadow': '0px 10px 20px rgba(0, 0, 0, 0.3)',
                'transition': 'transform 0.3s'
            })
        )
    return city_cards

if __name__ == '__main__':
    app.run_server(debug=True)