osu/osu.Game/Skinning/SkinnableTargetContainer.cs

100 lines
3.8 KiB
C#

// 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.
#nullable disable
using System;
using System.Linq;
using System.Threading;
using osu.Framework.Bindables;
using osu.Framework.Graphics;
namespace osu.Game.Skinning
{
public class SkinnableTargetContainer : SkinReloadableDrawable, ISkinnableTarget
{
private SkinnableTargetComponentsContainer content;
public SkinnableTarget Target { get; }
public IBindableList<ISkinnableDrawable> Components => components;
private readonly BindableList<ISkinnableDrawable> components = new BindableList<ISkinnableDrawable>();
public override bool IsPresent => base.IsPresent || Scheduler.HasPendingTasks; // ensure that components are loaded even if the target container is hidden (ie. due to user toggle).
public bool ComponentsLoaded { get; private set; }
private CancellationTokenSource cancellationSource;
public SkinnableTargetContainer(SkinnableTarget target)
{
Target = target;
}
/// <summary>
/// Reload all components in this container from the current skin.
/// </summary>
public void Reload()
{
ClearInternal();
components.Clear();
ComponentsLoaded = false;
content = CurrentSkin.GetDrawableComponent(new SkinnableTargetComponent(Target)) as SkinnableTargetComponentsContainer;
cancellationSource?.Cancel();
cancellationSource = null;
if (content != null)
{
LoadComponentAsync(content, wrapper =>
{
AddInternal(wrapper);
components.AddRange(wrapper.Children.OfType<ISkinnableDrawable>());
ComponentsLoaded = true;
}, (cancellationSource = new CancellationTokenSource()).Token);
}
else
ComponentsLoaded = true;
}
/// <inheritdoc cref="ISkinnableTarget"/>
/// <exception cref="NotSupportedException">Thrown when attempting to add an element to a target which is not supported by the current skin.</exception>
/// <exception cref="ArgumentException">Thrown if the provided instance is not a <see cref="Drawable"/>.</exception>
public void Add(ISkinnableDrawable component)
{
if (content == null)
throw new NotSupportedException("Attempting to add a new component to a target container which is not supported by the current skin.");
if (!(component is Drawable drawable))
throw new ArgumentException($"Provided argument must be of type {nameof(Drawable)}.", nameof(component));
content.Add(drawable);
components.Add(component);
}
/// <inheritdoc cref="ISkinnableTarget"/>
/// <exception cref="NotSupportedException">Thrown when attempting to add an element to a target which is not supported by the current skin.</exception>
/// <exception cref="ArgumentException">Thrown if the provided instance is not a <see cref="Drawable"/>.</exception>
public void Remove(ISkinnableDrawable component)
{
if (content == null)
throw new NotSupportedException("Attempting to remove a new component from a target container which is not supported by the current skin.");
if (!(component is Drawable drawable))
throw new ArgumentException($"Provided argument must be of type {nameof(Drawable)}.", nameof(component));
content.Remove(drawable);
components.Remove(component);
}
protected override void SkinChanged(ISkinSource skin)
{
base.SkinChanged(skin);
Reload();
}
}
}