osu/osu.Game/Graphics/Containers/OsuHoverContainer.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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using osu.Framework.Allocation;
using osu.Framework.Extensions.IEnumerableExtensions;
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using osu.Framework.Graphics;
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using osu.Framework.Input.Events;
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using osuTK.Graphics;
using System.Collections.Generic;
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using osu.Game.Graphics.UserInterface;
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namespace osu.Game.Graphics.Containers
{
public class OsuHoverContainer : OsuClickableContainer
{
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protected const float FADE_DURATION = 500;
protected Color4 HoverColour;
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protected Color4 IdleColour = Color4.White;
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protected virtual IEnumerable<Drawable> EffectTargets => new[] { Content };
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public OsuHoverContainer(HoverSampleSet sampleSet = HoverSampleSet.Default)
: base(sampleSet)
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{
Enabled.ValueChanged += e =>
{
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if (isHovered)
{
if (e.NewValue)
fadeIn();
else
fadeOut();
}
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};
}
private bool isHovered;
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protected override bool OnHover(HoverEvent e)
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{
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if (isHovered)
return false;
isHovered = true;
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if (!Enabled.Value)
return false;
fadeIn();
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return base.OnHover(e);
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}
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protected override void OnHoverLost(HoverLostEvent e)
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{
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if (!isHovered)
return;
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isHovered = false;
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fadeOut();
base.OnHoverLost(e);
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}
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[BackgroundDependencyLoader]
private void load(OsuColour colours)
{
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if (HoverColour == default)
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HoverColour = colours.Yellow;
}
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protected override void LoadComplete()
{
base.LoadComplete();
EffectTargets.ForEach(d => d.FadeColour(IdleColour));
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}
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private void fadeIn() => EffectTargets.ForEach(d => d.FadeColour(HoverColour, FADE_DURATION, Easing.OutQuint));
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private void fadeOut() => EffectTargets.ForEach(d => d.FadeColour(IdleColour, FADE_DURATION, Easing.OutQuint));
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}
}