import panel as pn
import numpy as np
import holoviews as hv

pn.extension(sizing_mode='stretch_width')

bootstrap = pn.template.BootstrapTemplate(title='Bootstrap Template')

xs = np.linspace(0, np.pi)
freq = pn.widgets.FloatSlider(name="Frequency", start=0, end=10, value=2)
phase = pn.widgets.FloatSlider(name="Phase", start=0, end=np.pi)

@pn.depends(freq=freq, phase=phase)
def sine(freq, phase):
    return hv.Curve((xs, np.sin(xs*freq+phase))).opts(
        responsive=True, min_height=400)

@pn.depends(freq=freq, phase=phase)
def cosine(freq, phase):
    return hv.Curve((xs, np.cos(xs*freq+phase))).opts(
        responsive=True, min_height=400)

bootstrap.sidebar.append(freq)
bootstrap.sidebar.append(phase)

bootstrap.main.append(
    pn.Row(
        pn.Card(hv.DynamicMap(sine), title='Sine'),
        pn.Card(hv.DynamicMap(cosine), title='Cosine')
    )
)

import time

# Callback that will be called when the About button is clicked
def about_callback(event):
    bootstrap.open_modal()
    time.sleep(10)
    bootstrap.close_modal()

# Create, link and add the button to the sidebar
btn = pn.widgets.Button(name="About")
btn.on_click(about_callback)
bootstrap.sidebar.append(btn)

# Add some content to the modal
bootstrap.modal.append("# About...")

from panel.template import DefaultTheme

DefaultTheme.find_theme(pn.template.MaterialTemplate)

import param

from panel.template.theme import Theme
from bokeh.themes import DARK_MINIMAL

class DarkTheme(Theme):
    """
    The DarkTheme provides a dark color palette
    """

    bokeh_theme = param.ClassSelector(class_=(Theme, str), default=DARK_MINIMAL)

class MaterialDarkTheme(DarkTheme):

    # css = param.Filename() Here we could declare some custom CSS to apply
    
    # This tells Panel to use this implementation
    _template = pn.template.MaterialTemplate

from panel.template import DarkTheme

dark_material = pn.template.MaterialTemplate(title='Material Template', theme=DarkTheme)

dark_material.sidebar.append(freq)
dark_material.sidebar.append(phase)

dark_material.main.append(
    pn.Row(
        pn.Card(hv.DynamicMap(sine), title='Sine'),
        pn.Card(hv.DynamicMap(cosine), title='Cosine')
    )
)

template = """
{% extends base %}

<!-- goes in body -->
{% block postamble %}
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">
{% endblock %}

<!-- goes in body -->
{% block contents %}
{{ app_title }}
<p>This is a Panel app with a custom template allowing us to compose multiple Panel objects into a single HTML document.</p>
<br>
<div class="container">
  <div class="row">
    <div class="col-sm">
      {{ embed(roots.A) }}
    </div>
    <div class="col-sm">
      {{ embed(roots.B) }}
    </div>
  </div>
</div>
{% endblock %}
"""

tmpl = pn.Template(template)

tmpl.add_variable('app_title', '<h1>Custom Template App</h1>')

tmpl.add_panel('A', hv.Curve([1, 2, 3]))
tmpl.add_panel('B', hv.Curve([1, 2, 3]))

tmpl

nb_template = """
{% extends base %}

{% block contents %}
{{ app_title }}
<p>This is a Panel app with a custom template allowing us to compose multiple Panel objects into a single HTML document.</p>
<br>
<div style="display:table; width: 100%">
  <div style="display:table-cell; margin: auto">
    {{ embed(roots.A) }}
  </div>
  <div style="display:table-cell; margin: auto">
    {{ embed(roots.B) }}
  </div>
</div>
{% endblock %}
"""

tmpl = pn.Template(template, nb_template=nb_template)

tmpl.add_variable('app_title', '<h1>Custom Template App</h1>')

tmpl.add_panel('A', hv.Curve([1, 2, 3]))
tmpl.add_panel('B', hv.Curve([1, 2, 3]))

tmpl

from jinja2 import Environment, FileSystemLoader

env = Environment(loader=FileSystemLoader('.'))
jinja_template = env.get_template('sample_template.html')

tmpl = pn.Template(jinja_template)

tmpl.add_panel('A', hv.Curve([1, 2, 3]))
tmpl.add_panel('B', hv.Curve([1, 2, 3]))
tmpl.servable()