osu/osu.Game/Graphics/UserInterfaceV2/SwitchButton.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.Bindables;
using osu.Framework.Extensions.Color4Extensions;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Colour;
using osu.Framework.Graphics.Containers;
using osu.Framework.Graphics.Shapes;
using osu.Framework.Graphics.UserInterface;
using osu.Framework.Input.Events;
using osuTK;
using osuTK.Graphics;
2019-09-25 08:53:08 +00:00
namespace osu.Game.Graphics.UserInterfaceV2
{
public class SwitchButton : Checkbox
{
private const float border_thickness = 4.5f;
private const float padding = 1.25f;
private readonly Box fill;
private readonly Container switchContainer;
private readonly Drawable switchCircle;
private readonly CircularBorderContainer circularContainer;
private Color4 enabledColour;
private Color4 disabledColour;
public SwitchButton()
{
Size = new Vector2(45, 20);
InternalChild = circularContainer = new CircularBorderContainer
{
RelativeSizeAxes = Axes.Both,
BorderColour = Color4.White,
BorderThickness = border_thickness,
Masking = true,
Children = new Drawable[]
{
fill = new Box
{
RelativeSizeAxes = Axes.Both,
AlwaysPresent = true,
Alpha = 0
},
new Container
{
RelativeSizeAxes = Axes.Both,
Padding = new MarginPadding(border_thickness + padding),
Child = switchContainer = new Container
{
RelativeSizeAxes = Axes.Both,
Child = switchCircle = new CircularContainer
{
RelativeSizeAxes = Axes.Both,
FillMode = FillMode.Fit,
Masking = true,
Child = new Box { RelativeSizeAxes = Axes.Both }
}
}
}
}
};
}
[BackgroundDependencyLoader]
private void load(OsuColour colours)
{
enabledColour = colours.BlueDark;
disabledColour = colours.Gray3;
switchContainer.Colour = enabledColour;
fill.Colour = disabledColour;
}
protected override void LoadComplete()
{
base.LoadComplete();
Current.BindValueChanged(updateState, true);
FinishTransforms(true);
}
private void updateState(ValueChangedEvent<bool> state)
{
switchCircle.MoveToX(state.NewValue ? switchContainer.DrawWidth - switchCircle.DrawWidth : 0, 200, Easing.OutQuint);
fill.FadeTo(state.NewValue ? 1 : 0, 250, Easing.OutQuint);
updateBorder();
}
protected override bool OnHover(HoverEvent e)
{
updateBorder();
return base.OnHover(e);
}
protected override void OnHoverLost(HoverLostEvent e)
{
updateBorder();
base.OnHoverLost(e);
}
private void updateBorder()
{
circularContainer.TransformBorderTo((Current.Value ? enabledColour : disabledColour).Lighten(IsHovered ? 0.3f : 0));
}
private class CircularBorderContainer : CircularContainer
{
public void TransformBorderTo(SRGBColour colour)
=> this.TransformTo(nameof(BorderColour), colour, 250, Easing.OutQuint);
}
}
}