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osu-lazer/osu.Game/Graphics/UserInterface/OsuTabControl.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;
using System.Linq;
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using osuTK;
using osuTK.Graphics;
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using osu.Framework.Allocation;
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using osu.Framework.Bindables;
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using osu.Framework.Extensions;
using osu.Framework.Extensions.Color4Extensions;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Shapes;
using osu.Framework.Graphics.Sprites;
using osu.Framework.Graphics.UserInterface;
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using osu.Framework.Input.Events;
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using osu.Framework.Utils;
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using osu.Game.Graphics.Sprites;
namespace osu.Game.Graphics.UserInterface
{
public class OsuTabControl<T> : TabControl<T>
{
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private Color4 accentColour;
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public const float HORIZONTAL_SPACING = 10;
public virtual Color4 AccentColour
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{
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get => accentColour;
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set
{
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accentColour = value;
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if (Dropdown is IHasAccentColour dropdown)
dropdown.AccentColour = value;
foreach (var i in TabContainer.Children.OfType<IHasAccentColour>())
i.AccentColour = value;
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}
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}
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private readonly Box strip;
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protected override Dropdown<T> CreateDropdown() => new OsuTabDropdown<T>();
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protected override TabItem<T> CreateTabItem(T value) => new OsuTabItem(value);
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protected virtual float StripWidth => TabContainer.Children.Sum(c => c.IsPresent ? c.DrawWidth + TabContainer.Spacing.X : 0) - TabContainer.Spacing.X;
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/// <summary>
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/// Whether entries should be automatically populated if <typeparamref name="T"/> is an <see cref="Enum"/> type.
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/// </summary>
protected virtual bool AddEnumEntriesAutomatically => true;
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private static bool isEnumType => typeof(T).IsEnum;
public OsuTabControl()
{
TabContainer.Spacing = new Vector2(HORIZONTAL_SPACING, 0f);
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AddInternal(strip = new Box
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{
Anchor = Anchor.BottomLeft,
Origin = Anchor.BottomLeft,
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Height = 1,
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Colour = Color4.White.Opacity(0),
});
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if (isEnumType && AddEnumEntriesAutomatically)
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{
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foreach (var val in (T[])Enum.GetValues(typeof(T)))
AddItem(val);
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}
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}
[BackgroundDependencyLoader]
private void load(OsuColour colours)
{
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if (accentColour == default)
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AccentColour = colours.Blue;
}
public Color4 StripColour
{
get => strip.Colour;
set => strip.Colour = value;
}
protected override void UpdateAfterChildren()
{
base.UpdateAfterChildren();
// dont bother calculating if the strip is invisible
if (strip.Colour.MaxAlpha > 0)
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strip.Width = Interpolation.ValueAt(Math.Clamp(Clock.ElapsedFrameTime, 0, 1000), strip.Width, StripWidth, 0, 500, Easing.OutQuint);
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}
public class OsuTabItem : TabItem<T>, IHasAccentColour
{
protected readonly SpriteText Text;
protected readonly Box Bar;
private Color4 accentColour;
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public Color4 AccentColour
{
get => accentColour;
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set
{
accentColour = value;
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if (!Active.Value)
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Text.Colour = value;
}
}
private const float transition_length = 500;
protected void FadeHovered()
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{
Bar.FadeIn(transition_length, Easing.OutQuint);
Text.FadeColour(Color4.White, transition_length, Easing.OutQuint);
}
protected void FadeUnhovered()
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{
Bar.FadeTo(IsHovered ? 1 : 0, transition_length, Easing.OutQuint);
Text.FadeColour(IsHovered ? Color4.White : AccentColour, transition_length, Easing.OutQuint);
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}
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protected override bool OnHover(HoverEvent e)
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{
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if (!Active.Value)
FadeHovered();
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return true;
}
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protected override void OnHoverLost(HoverLostEvent e)
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{
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if (!Active.Value)
FadeUnhovered();
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}
[BackgroundDependencyLoader]
private void load(OsuColour colours)
{
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if (accentColour == default)
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AccentColour = colours.Blue;
}
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public OsuTabItem(T value)
: base(value)
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{
AutoSizeAxes = Axes.X;
RelativeSizeAxes = Axes.Y;
Children = new Drawable[]
{
Text = new OsuSpriteText
{
Margin = new MarginPadding { Top = 5, Bottom = 5 },
Origin = Anchor.BottomLeft,
Anchor = Anchor.BottomLeft,
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Text = (value as IHasDescription)?.Description ?? (value as Enum)?.GetDescription() ?? value.ToString(),
Font = OsuFont.GetFont(size: 14)
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},
Bar = new Box
{
RelativeSizeAxes = Axes.X,
Height = 1,
Alpha = 0,
Colour = Color4.White,
Origin = Anchor.BottomLeft,
Anchor = Anchor.BottomLeft,
},
new HoverClickSounds()
};
}
protected override void OnActivated()
{
Text.Font = Text.Font.With(weight: FontWeight.Bold);
FadeHovered();
}
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protected override void OnDeactivated()
{
Text.Font = Text.Font.With(weight: FontWeight.Medium);
FadeUnhovered();
}
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}
}
}