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71 lines
2.2 KiB
C#
71 lines
2.2 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.Collections.Generic;
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using osu.Framework.Bindables;
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namespace osu.Game.Screens.Select.Carousel
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{
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public abstract class CarouselItem
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{
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public readonly BindableBool Filtered = new BindableBool();
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public readonly Bindable<CarouselItemState> State = new Bindable<CarouselItemState>(CarouselItemState.NotSelected);
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/// <summary>
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/// This item is not in a hidden state.
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/// </summary>
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public bool Visible => State.Value != CarouselItemState.Collapsed && !Filtered.Value;
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public virtual List<DrawableCarouselItem> Drawables
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{
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get
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{
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var items = new List<DrawableCarouselItem>();
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var self = DrawableRepresentation.Value;
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if (self?.IsPresent == true) items.Add(self);
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return items;
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}
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}
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protected CarouselItem()
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{
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DrawableRepresentation = new Lazy<DrawableCarouselItem>(CreateDrawableRepresentation);
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Filtered.ValueChanged += filtered =>
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{
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if (filtered.NewValue && State.Value == CarouselItemState.Selected)
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State.Value = CarouselItemState.NotSelected;
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};
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}
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protected readonly Lazy<DrawableCarouselItem> DrawableRepresentation;
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/// <summary>
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/// Used as a default sort method for <see cref="CarouselItem"/>s of differing types.
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/// </summary>
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internal ulong ChildID;
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/// <summary>
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/// Create a fresh drawable version of this item. If you wish to consume the current representation, use <see cref="DrawableRepresentation"/> instead.
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/// </summary>
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protected abstract DrawableCarouselItem CreateDrawableRepresentation();
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public virtual void Filter(FilterCriteria criteria)
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{
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}
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public virtual int CompareTo(FilterCriteria criteria, CarouselItem other) => ChildID.CompareTo(other.ChildID);
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}
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public enum CarouselItemState
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{
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Collapsed,
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NotSelected,
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Selected,
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}
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}
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