osu/osu.Game/Overlays/TabbableOnlineOverlay.cs

101 lines
2.8 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.
using System.Threading;
using osu.Framework.Allocation;
using osu.Framework.Bindables;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
using osu.Game.Online.API;
namespace osu.Game.Overlays
{
public abstract class TabbableOnlineOverlay<THeader, TEnum> : OnlineOverlay<THeader>
where THeader : TabControlOverlayHeader<TEnum>
{
private readonly IBindable<APIState> apiState = new Bindable<APIState>();
private CancellationTokenSource cancellationToken;
private bool displayUpdateRequired = true;
protected TabbableOnlineOverlay(OverlayColourScheme colourScheme)
: base(colourScheme)
{
}
[BackgroundDependencyLoader]
private void load(IAPIProvider api)
{
apiState.BindTo(api.State);
apiState.BindValueChanged(onlineStateChanged, true);
}
protected override void LoadComplete()
{
base.LoadComplete();
Header.Current.BindValueChanged(tab => OnTabChanged(tab.NewValue));
}
protected override void PopIn()
{
base.PopIn();
// We don't want to create a new display on every call, only when exiting from fully closed state.
if (displayUpdateRequired)
{
Header.Current.TriggerChange();
displayUpdateRequired = false;
}
}
protected override void PopOutComplete()
{
base.PopOutComplete();
LoadDisplay(Empty());
displayUpdateRequired = true;
}
protected void LoadDisplay(Drawable display)
{
ScrollFlow.ScrollToStart();
LoadComponentAsync(display, loaded =>
{
Loading.Hide();
Child = loaded;
}, (cancellationToken = new CancellationTokenSource()).Token);
}
protected virtual void OnTabChanged(TEnum tab)
{
cancellationToken?.Cancel();
Loading.Show();
if (!API.IsLoggedIn)
{
LoadDisplay(Empty());
return;
}
CreateDisplayToLoad(tab);
}
protected abstract void CreateDisplayToLoad(TEnum tab);
private void onlineStateChanged(ValueChangedEvent<APIState> state) => Schedule(() =>
{
if (State.Value == Visibility.Hidden)
return;
Header.Current.TriggerChange();
});
protected override void Dispose(bool isDisposing)
{
cancellationToken?.Cancel();
base.Dispose(isDisposing);
}
}
}