mirror of
https://github.com/ppy/osu.git
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150 lines
4.8 KiB
C#
150 lines
4.8 KiB
C#
// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
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// See the LICENCE file in the repository root for full licence text.
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using System.Collections.Generic;
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using osu.Framework.Allocation;
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using osu.Framework.Extensions.Color4Extensions;
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using osu.Framework.Graphics;
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using osu.Framework.Graphics.Containers;
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using osu.Framework.Graphics.Effects;
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using osu.Framework.Graphics.Shapes;
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using osu.Framework.Graphics.Sprites;
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using osu.Framework.Input.Events;
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using osu.Game.Graphics.Containers;
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using osuTK;
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using osuTK.Graphics;
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namespace osu.Game.Overlays
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{
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/// <summary>
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/// <see cref="OsuScrollContainer"/> which provides <see cref="ScrollToTopButton"/>. Mostly used in <see cref="FullscreenOverlay"/>.
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/// </summary>
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public class OverlayScrollContainer : OsuScrollContainer
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{
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/// <summary>
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/// Scroll position at which the <see cref="ScrollToTopButton"/> will be shown.
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/// </summary>
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private const int button_scroll_position = 200;
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protected readonly ScrollToTopButton Button;
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public OverlayScrollContainer()
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{
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AddInternal(Button = new ScrollToTopButton
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{
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Anchor = Anchor.BottomRight,
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Origin = Anchor.BottomRight,
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Margin = new MarginPadding(20),
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Action = () =>
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{
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ScrollToStart();
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Button.State = Visibility.Hidden;
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}
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});
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}
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protected override void UpdateAfterChildren()
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{
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base.UpdateAfterChildren();
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if (ScrollContent.DrawHeight + button_scroll_position < DrawHeight)
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{
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Button.State = Visibility.Hidden;
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return;
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}
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Button.State = Target > button_scroll_position ? Visibility.Visible : Visibility.Hidden;
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}
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public class ScrollToTopButton : OsuHoverContainer
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{
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private const int fade_duration = 500;
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private Visibility state;
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public Visibility State
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{
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get => state;
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set
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{
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if (value == state)
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return;
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state = value;
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Enabled.Value = state == Visibility.Visible;
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this.FadeTo(state == Visibility.Visible ? 1 : 0, fade_duration, Easing.OutQuint);
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}
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}
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protected override IEnumerable<Drawable> EffectTargets => new[] { background };
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private Color4 flashColour;
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private readonly Container content;
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private readonly Box background;
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public ScrollToTopButton()
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{
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Size = new Vector2(50);
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Alpha = 0;
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Add(content = new CircularContainer
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{
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RelativeSizeAxes = Axes.Both,
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Anchor = Anchor.Centre,
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Origin = Anchor.Centre,
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Masking = true,
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EdgeEffect = new EdgeEffectParameters
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{
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Type = EdgeEffectType.Shadow,
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Offset = new Vector2(0f, 1f),
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Radius = 3f,
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Colour = Color4.Black.Opacity(0.25f),
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},
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Children = new Drawable[]
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{
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background = new Box
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{
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RelativeSizeAxes = Axes.Both
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},
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new SpriteIcon
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{
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Anchor = Anchor.Centre,
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Origin = Anchor.Centre,
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Size = new Vector2(15),
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Icon = FontAwesome.Solid.ChevronUp
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}
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}
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});
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TooltipText = "Scroll to top";
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}
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[BackgroundDependencyLoader]
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private void load(OverlayColourProvider colourProvider)
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{
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IdleColour = colourProvider.Background6;
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HoverColour = colourProvider.Background5;
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flashColour = colourProvider.Light1;
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}
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protected override bool OnClick(ClickEvent e)
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{
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background.FlashColour(flashColour, 800, Easing.OutQuint);
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return base.OnClick(e);
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}
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protected override bool OnMouseDown(MouseDownEvent e)
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{
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content.ScaleTo(0.75f, 2000, Easing.OutQuint);
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return true;
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}
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protected override void OnMouseUp(MouseUpEvent e)
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{
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content.ScaleTo(1, 1000, Easing.OutElastic);
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base.OnMouseUp(e);
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}
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}
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}
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}
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