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144 lines
4.1 KiB
C#
144 lines
4.1 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;
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using System.Linq;
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using osu.Framework;
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using osuTK;
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using osuTK.Graphics;
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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.Shapes;
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using osu.Framework.Input.Events;
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using osu.Framework.Threading;
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using osu.Game.Graphics.Containers;
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using osu.Game.Overlays.Toolbar;
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namespace osu.Game.Overlays.Settings
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{
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public class Sidebar : Container<SidebarButton>, IStateful<ExpandedState>
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{
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private readonly FillFlowContainer<SidebarButton> content;
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public const float DEFAULT_WIDTH = ToolbarButton.WIDTH;
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public const int EXPANDED_WIDTH = 200;
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public event Action<ExpandedState> StateChanged;
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protected override Container<SidebarButton> Content => content;
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public Sidebar()
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{
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RelativeSizeAxes = Axes.Y;
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InternalChildren = new Drawable[]
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{
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new Box
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{
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Colour = Color4.Black,
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RelativeSizeAxes = Axes.Both,
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},
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new SidebarScrollContainer
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{
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Children = new[]
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{
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content = new FillFlowContainer<SidebarButton>
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{
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Origin = Anchor.CentreLeft,
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Anchor = Anchor.CentreLeft,
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AutoSizeAxes = Axes.Y,
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RelativeSizeAxes = Axes.X,
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Direction = FillDirection.Vertical,
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}
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}
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},
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};
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}
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private ScheduledDelegate expandEvent;
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private ExpandedState state;
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protected override bool OnHover(HoverEvent e)
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{
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queueExpandIfHovering();
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return true;
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}
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protected override void OnHoverLost(HoverLostEvent e)
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{
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expandEvent?.Cancel();
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lastHoveredButton = null;
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State = ExpandedState.Contracted;
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base.OnHoverLost(e);
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}
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protected override bool OnMouseMove(MouseMoveEvent e)
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{
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queueExpandIfHovering();
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return base.OnMouseMove(e);
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}
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private class SidebarScrollContainer : OsuScrollContainer
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{
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public SidebarScrollContainer()
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{
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Content.Anchor = Anchor.CentreLeft;
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Content.Origin = Anchor.CentreLeft;
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RelativeSizeAxes = Axes.Both;
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ScrollbarVisible = false;
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}
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}
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public ExpandedState State
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{
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get => state;
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set
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{
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expandEvent?.Cancel();
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if (state == value) return;
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state = value;
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switch (state)
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{
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default:
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this.ResizeTo(new Vector2(DEFAULT_WIDTH, Height), 500, Easing.OutQuint);
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break;
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case ExpandedState.Expanded:
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this.ResizeTo(new Vector2(EXPANDED_WIDTH, Height), 500, Easing.OutQuint);
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break;
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}
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StateChanged?.Invoke(State);
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}
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}
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private Drawable lastHoveredButton;
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private Drawable hoveredButton => content.Children.FirstOrDefault(c => c.IsHovered);
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private void queueExpandIfHovering()
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{
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// only expand when we hover a different button.
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if (lastHoveredButton == hoveredButton) return;
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if (!IsHovered) return;
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if (State != ExpandedState.Expanded)
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{
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expandEvent?.Cancel();
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expandEvent = Scheduler.AddDelayed(() => State = ExpandedState.Expanded, 750);
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}
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lastHoveredButton = hoveredButton;
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}
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}
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public enum ExpandedState
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{
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Contracted,
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Expanded,
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}
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}
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