osu-lazer/osu.Game/Overlays/Volume/MuteButton.cs

// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// See the LICENCE file in the repository root for full licence text.

using System;
using osu.Framework.Allocation;
using osu.Framework.Bindables;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Colour;
using osu.Framework.Graphics.Containers;
using osu.Framework.Graphics.Shapes;
using osu.Framework.Graphics.Sprites;
using osu.Framework.Graphics.UserInterface;
using osu.Framework.Input.Events;
using osu.Game.Graphics;
using osu.Game.Graphics.UserInterface;
using osuTK;

namespace osu.Game.Overlays.Volume
{
    public partial class MuteButton : OsuButton, IHasCurrentValue<bool>
    {
        private readonly Bindable<bool> current = new Bindable<bool>();

        public Bindable<bool> Current
        {
            get => current;
            set
            {
                ArgumentNullException.ThrowIfNull(value);

                current.UnbindBindings();
                current.BindTo(value);
            }
        }

        private ColourInfo hoveredBorderColour;
        private ColourInfo unhoveredBorderColour;
        private CompositeDrawable border = null!;

        public MuteButton()
        {
            const float width = 30;
            const float height = 30;

            Size = new Vector2(width, height);
            Content.CornerRadius = height / 2;
            Content.CornerExponent = 2;

            Action = () => Current.Value = !Current.Value;
        }

        [BackgroundDependencyLoader]
        private void load(OsuColour colours)
        {
            BackgroundColour = colours.Gray1;
            hoveredBorderColour = colours.PinkLight;
            unhoveredBorderColour = colours.Gray1;

            SpriteIcon icon;

            AddRange(new Drawable[]
            {
                icon = new SpriteIcon
                {
                    Anchor = Anchor.Centre,
                    Origin = Anchor.Centre,
                },
                border = new CircularContainer
                {
                    RelativeSizeAxes = Axes.Both,
                    Masking = true,
                    BorderThickness = 3,
                    BorderColour = unhoveredBorderColour,
                    Child = new Box
                    {
                        RelativeSizeAxes = Axes.Both,
                        Alpha = 0,
                        AlwaysPresent = true
                    }
                }
            });

            Current.BindValueChanged(muted =>
            {
                icon.Icon = muted.NewValue ? FontAwesome.Solid.VolumeMute : FontAwesome.Solid.VolumeUp;
                icon.Size = new Vector2(muted.NewValue ? 12 : 16);
                icon.Margin = new MarginPadding { Right = muted.NewValue ? 2 : 0 };
            }, true);
        }

        protected override bool OnHover(HoverEvent e)
        {
            border.TransformTo(nameof(BorderColour), hoveredBorderColour, 500, Easing.OutQuint);
            return false;
        }

        protected override void OnHoverLost(HoverLostEvent e)
        {
            border.TransformTo(nameof(BorderColour), unhoveredBorderColour, 500, Easing.OutQuint);
        }

        protected override bool OnMouseDown(MouseDownEvent e)
        {
            base.OnMouseDown(e);

            // Block mouse down to avoid dismissing overlays sitting behind the mute button
            return true;
        }
    }
}