State of Player Widget

seanlaw · December 1, 2021, 4:04pm

With the player widget, is there an attribute to know whether the player is currently “playing” or if it is “paused”/“stopped”?

ahuang11 · December 1, 2021, 5:14pm

I think not, but can be submitted as a Github feature request to create a “playing” variable here (if I’m not mistaken):

github.com

holoviz/panel/blob/master/panel/models/player.ts

import {Enum} from "@bokehjs/core/kinds"
import * as p from "@bokehjs/core/properties"
import {div} from "@bokehjs/core/dom"
import {Widget, WidgetView} from "@bokehjs/models/widgets/widget"


function press(btn_list: HTMLButtonElement[]): void {
  btn_list.forEach((btn) => btn.style.borderStyle = 'inset')
}

function unpress(btn_list: HTMLButtonElement[]): void {
  btn_list.forEach((btn) => btn.style.borderStyle = 'outset')
}

export class PlayerView extends WidgetView {
  model: Player

  protected buttonEl: HTMLDivElement
  protected groupEl: HTMLDivElement
  protected sliderEl: HTMLInputElement

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And then expose it here.

github.com

holoviz/panel/blob/master/panel/widgets/player.py

"""
Defines Player widgets which offer media-player like controls.
"""
import param

from ..models.widgets import Player as _BkPlayer
from ..util import isIn, indexOf
from .base import Widget
from .select import SelectBase


class PlayerBase(Widget):

    interval = param.Integer(default=500, doc="Interval between updates")

    loop_policy = param.ObjectSelector(default='once',
                                       objects=['once', 'loop', 'reflect'], doc="""
        Policy used when player hits last frame""")

    step = param.Integer(default=1, doc="""

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Hoxbro · December 1, 2021, 6:00pm

If you can’t wait you can expose the direction parameter:

import panel as pn
import param

pn.extension()

class Player2(pn.widgets.Player):
    direction = param.Integer(readonly=True)

player = Player2(name='Player', start=0, end=100, value=32, loop_policy='loop')

pn.Column(player, player.param.direction)

player