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197 lines
6.5 KiB
C#
197 lines
6.5 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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#nullable disable
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using System.Collections.Generic;
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using osu.Framework.Allocation;
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using osu.Framework.Bindables;
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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 osu.Game.Graphics.UserInterface;
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using osu.Game.Resources.Localisation.Web;
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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="UserTrackingScrollContainer"/> which provides <see cref="ScrollBackButton"/>. Mostly used in <see cref="FullscreenOverlay{T}"/>.
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/// </summary>
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public partial class OverlayScrollContainer : UserTrackingScrollContainer
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{
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/// <summary>
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/// Scroll position at which the <see cref="ScrollBackButton"/> will be shown.
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/// </summary>
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private const int button_scroll_position = 200;
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public ScrollBackButton Button { get; private set; }
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private readonly Bindable<float?> lastScrollTarget = new Bindable<float?>();
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[BackgroundDependencyLoader]
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private void load()
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{
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AddInternal(Button = new ScrollBackButton
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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 = scrollBack,
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LastScrollTarget = { BindTarget = lastScrollTarget }
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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 || lastScrollTarget.Value != null ? Visibility.Visible : Visibility.Hidden;
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}
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protected override void OnUserScroll(float value, bool animated = true, double? distanceDecay = default)
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{
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base.OnUserScroll(value, animated, distanceDecay);
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lastScrollTarget.Value = null;
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}
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private void scrollBack()
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{
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if (lastScrollTarget.Value == null)
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{
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lastScrollTarget.Value = Target;
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ScrollToStart();
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}
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else
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{
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ScrollTo(lastScrollTarget.Value.Value);
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lastScrollTarget.Value = null;
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}
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}
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public partial class ScrollBackButton : 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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private readonly SpriteIcon spriteIcon;
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public Bindable<float?> LastScrollTarget = new Bindable<float?>();
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public ScrollBackButton()
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: base(HoverSampleSet.ScrollToTop)
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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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spriteIcon = 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 = CommonStrings.ButtonsBackToTop;
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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 void LoadComplete()
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{
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base.LoadComplete();
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LastScrollTarget.BindValueChanged(target =>
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{
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spriteIcon.RotateTo(target.NewValue != null ? 180 : 0, fade_duration, Easing.OutQuint);
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TooltipText = target.NewValue != null ? CommonStrings.ButtonsBackToPrevious : CommonStrings.ButtonsBackToTop;
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}, true);
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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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protected override bool OnHover(HoverEvent e)
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{
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base.OnHover(e);
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return true;
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}
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}
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}
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}
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