osu/osu.Game/Graphics/UserInterface/BreadcrumbControl.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 System;
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using osuTK;
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using osu.Framework;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
using osu.Framework.Graphics.UserInterface;
using System.Linq;
using osu.Framework.Graphics.Sprites;
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namespace osu.Game.Graphics.UserInterface
{
public class BreadcrumbControl<T> : OsuTabControl<T>
{
private const float padding = 10;
private const float item_chevron_size = 10;
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protected override TabItem<T> CreateTabItem(T value) => new BreadcrumbTabItem(value)
{
AccentColour = AccentColour,
};
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protected override float StripWidth() => base.StripWidth() - (padding + item_chevron_size);
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public BreadcrumbControl()
{
Height = 32;
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TabContainer.Spacing = new Vector2(padding, 0f);
Current.ValueChanged += index =>
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{
foreach (var t in TabContainer.Children.OfType<BreadcrumbTabItem>())
{
var tIndex = TabContainer.IndexOf(t);
var tabIndex = TabContainer.IndexOf(TabMap[index.NewValue]);
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t.State = tIndex < tabIndex ? Visibility.Hidden : Visibility.Visible;
t.Chevron.FadeTo(tIndex <= tabIndex ? 0f : 1f, 500, Easing.OutQuint);
}
};
}
private class BreadcrumbTabItem : OsuTabItem, IStateful<Visibility>
{
public event Action<Visibility> StateChanged;
public readonly SpriteIcon Chevron;
//don't allow clicking between transitions and don't make the chevron clickable
public override bool ReceivePositionalInputAt(Vector2 screenSpacePos) => Alpha == 1f && Text.ReceivePositionalInputAt(screenSpacePos);
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public override bool HandleNonPositionalInput => State == Visibility.Visible;
public override bool HandlePositionalInput => State == Visibility.Visible;
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private Visibility state;
public Visibility State
{
get => state;
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set
{
if (value == state) return;
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state = value;
const float transition_duration = 500;
if (State == Visibility.Visible)
{
this.FadeIn(transition_duration, Easing.OutQuint);
this.ScaleTo(new Vector2(1f), transition_duration, Easing.OutQuint);
}
else
{
this.FadeOut(transition_duration, Easing.OutQuint);
this.ScaleTo(new Vector2(0.8f, 1f), transition_duration, Easing.OutQuint);
}
StateChanged?.Invoke(State);
}
}
public override void Hide() => State = Visibility.Hidden;
public override void Show() => State = Visibility.Visible;
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public BreadcrumbTabItem(T value)
: base(value)
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{
Text.Font = Text.Font.With(size: 18);
Text.Margin = new MarginPadding { Vertical = 8 };
Padding = new MarginPadding { Right = padding + item_chevron_size };
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Add(Chevron = new SpriteIcon
{
Anchor = Anchor.CentreRight,
Origin = Anchor.CentreLeft,
Size = new Vector2(item_chevron_size),
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Icon = FontAwesome.Solid.ChevronRight,
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Margin = new MarginPadding { Left = padding },
Alpha = 0f,
});
}
}
}
}