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osu-lazer/osu.Game/Graphics/UserInterface/LoadingSpinner.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.
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#nullable disable
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using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
using osu.Framework.Graphics.Shapes;
using osu.Framework.Graphics.Sprites;
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using osuTK;
using osuTK.Graphics;
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namespace osu.Game.Graphics.UserInterface
{
/// <summary>
/// A loading spinner.
/// </summary>
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public partial class LoadingSpinner : VisibilityContainer
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{
private readonly SpriteIcon spinner;
protected override bool StartHidden => true;
protected Container MainContents;
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public const float TRANSITION_DURATION = 500;
private const float spin_duration = 900;
/// <summary>
/// Constuct a new loading spinner.
/// </summary>
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/// <param name="withBox">Whether the spinner should have a surrounding black box for visibility.</param>
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/// <param name="inverted">Whether colours should be inverted (black spinner instead of white).</param>
public LoadingSpinner(bool withBox = false, bool inverted = false)
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{
Size = new Vector2(60);
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Anchor = Anchor.Centre;
Origin = Anchor.Centre;
Child = MainContents = new Container
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{
RelativeSizeAxes = Axes.Both,
Masking = true,
CornerRadius = 20,
Anchor = Anchor.Centre,
Origin = Anchor.Centre,
Children = new Drawable[]
{
new Box
{
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Colour = inverted ? Color4.White : Color4.Black,
RelativeSizeAxes = Axes.Both,
Alpha = withBox ? 0.7f : 0
},
spinner = new SpriteIcon
{
Anchor = Anchor.Centre,
Origin = Anchor.Centre,
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Colour = inverted ? Color4.Black : Color4.White,
Scale = new Vector2(withBox ? 0.6f : 1),
RelativeSizeAxes = Axes.Both,
Icon = FontAwesome.Solid.CircleNotch
}
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}
};
}
protected override void LoadComplete()
{
base.LoadComplete();
rotate();
}
protected override void Update()
{
base.Update();
MainContents.CornerRadius = MainContents.DrawWidth / 4;
}
protected override void PopIn()
{
if (Alpha < 0.5f)
// reset animation if the user can't see us.
rotate();
MainContents.ScaleTo(1, TRANSITION_DURATION, Easing.OutQuint);
this.FadeIn(TRANSITION_DURATION * 2, Easing.OutQuint);
}
protected override void PopOut()
{
MainContents.ScaleTo(0.8f, TRANSITION_DURATION / 2, Easing.In);
this.FadeOut(TRANSITION_DURATION, Easing.OutQuint);
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}
private void rotate()
{
spinner.Spin(spin_duration * 3.5f, RotationDirection.Clockwise);
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MainContents.RotateTo(0).Then()
.RotateTo(90, spin_duration, Easing.InOutQuart).Then()
.RotateTo(180, spin_duration, Easing.InOutQuart).Then()
.RotateTo(270, spin_duration, Easing.InOutQuart).Then()
.RotateTo(360, spin_duration, Easing.InOutQuart).Then()
.Loop();
}
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}
}