osu/osu.Game/Screens/OsuScreenStack.cs

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// 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.Graphics;
using osu.Framework.Screens;
using osu.Game.Graphics.Containers;
namespace osu.Game.Screens
{
public class OsuScreenStack : ScreenStack
{
[Cached]
private BackgroundScreenStack backgroundScreenStack;
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private ParallaxContainer parallaxContainer;
protected float ParallaxAmount => parallaxContainer.ParallaxAmount;
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public OsuScreenStack()
{
initializeStack();
}
public OsuScreenStack(IScreen baseScreen)
: base(baseScreen)
{
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initializeStack();
}
private void initializeStack()
{
InternalChild = parallaxContainer = new ParallaxContainer
{
RelativeSizeAxes = Axes.Both,
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Child = backgroundScreenStack = new BackgroundScreenStack { RelativeSizeAxes = Axes.Both },
};
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ScreenPushed += onScreenChange;
ScreenExited += onScreenChange;
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}
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private void onScreenChange(IScreen prev, IScreen next)
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{
parallaxContainer.ParallaxAmount = ParallaxContainer.DEFAULT_PARALLAX_AMOUNT * ((IOsuScreen)next)?.BackgroundParallaxAmount ?? 1.0f;
}
}
}