osu/osu.Game/Online/OnlineViewContainer.cs

98 lines
3.6 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.
using osu.Framework.Allocation;
using osu.Framework.Bindables;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
using osu.Game.Graphics.UserInterface;
using osu.Game.Online.API;
using osu.Game.Online.Placeholders;
namespace osu.Game.Online
{
/// <summary>
/// A <see cref="Container"/> for displaying online content which require a local user to be logged in.
/// Shows its children only when the local user is logged in and supports displaying a placeholder if not.
/// </summary>
public class OnlineViewContainer : Container
{
protected LoadingSpinner LoadingSpinner { get; private set; }
protected override Container<Drawable> Content { get; } = new Container { RelativeSizeAxes = Axes.Both };
private readonly string placeholderMessage;
private Drawable placeholder;
private const double transform_duration = 300;
[Resolved]
protected IAPIProvider API { get; private set; }
/// <summary>
/// Construct a new instance of an online view container.
/// </summary>
/// <param name="placeholderMessage">The message to display when not logged in. If empty, no button will display.</param>
public OnlineViewContainer(string placeholderMessage)
{
this.placeholderMessage = placeholderMessage;
}
private readonly IBindable<APIState> apiState = new Bindable<APIState>();
[BackgroundDependencyLoader]
private void load(IAPIProvider api)
{
InternalChildren = new[]
{
Content,
placeholder = string.IsNullOrEmpty(placeholderMessage) ? Empty() : new LoginPlaceholder(placeholderMessage),
LoadingSpinner = new LoadingSpinner
{
Alpha = 0,
}
};
apiState.BindTo(api.State);
apiState.BindValueChanged(onlineStateChanged, true);
}
private void onlineStateChanged(ValueChangedEvent<APIState> state) => Schedule(() =>
{
switch (state.NewValue)
{
case APIState.Offline:
PopContentOut(Content);
placeholder.ScaleTo(0.8f).Then().ScaleTo(1, 3 * transform_duration, Easing.OutQuint);
placeholder.FadeInFromZero(2 * transform_duration, Easing.OutQuint);
LoadingSpinner.Hide();
break;
case APIState.Online:
PopContentIn(Content);
placeholder.FadeOut(transform_duration / 2, Easing.OutQuint);
LoadingSpinner.Hide();
break;
case APIState.Failing:
case APIState.Connecting:
PopContentOut(Content);
LoadingSpinner.Show();
placeholder.FadeOut(transform_duration / 2, Easing.OutQuint);
break;
}
});
/// <summary>
/// Applies a transform to the online content to make it hidden.
/// </summary>
protected virtual void PopContentOut(Drawable content) => content.FadeOut(transform_duration / 2, Easing.OutQuint);
/// <summary>
/// Applies a transform to the online content to make it visible.
/// </summary>
protected virtual void PopContentIn(Drawable content) => content.FadeIn(transform_duration, Easing.OutQuint);
}
}