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osu-lazer/osu.Game/Screens/Edit/Compose/Components/SelectionBoxControl.cs

97 lines
2.7 KiB
C#

// 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 System;
using osu.Framework.Allocation;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
using osu.Framework.Graphics.Shapes;
using osu.Framework.Input.Events;
using osu.Game.Graphics;
namespace osu.Game.Screens.Edit.Compose.Components
{
/// <summary>
/// Represents the base appearance for UI controls of the <see cref="SelectionBox"/>,
/// such as scale handles, rotation handles, buttons, etc...
/// </summary>
public abstract class SelectionBoxControl : CompositeDrawable
{
public event Action OperationStarted;
public event Action OperationEnded;
internal event Action HoverGained;
internal event Action HoverLost;
private Circle circle;
[Resolved]
protected OsuColour Colours { get; private set; }
[BackgroundDependencyLoader]
private void load()
{
Origin = Anchor.Centre;
InternalChildren = new Drawable[]
{
circle = new Circle
{
RelativeSizeAxes = Axes.Both,
Anchor = Anchor.Centre,
Origin = Anchor.Centre,
},
};
}
protected override void LoadComplete()
{
base.LoadComplete();
UpdateHoverState();
}
protected override bool OnHover(HoverEvent e)
{
UpdateHoverState();
HoverGained?.Invoke();
return true;
}
protected override void OnHoverLost(HoverLostEvent e)
{
base.OnHoverLost(e);
HoverLost?.Invoke();
UpdateHoverState();
}
/// <summary>
/// Whether this control is currently handling mouse down input.
/// </summary>
protected bool HandlingMouse { get; set; }
protected override bool OnMouseDown(MouseDownEvent e)
{
HandlingMouse = true;
UpdateHoverState();
return true;
}
protected override void OnMouseUp(MouseUpEvent e)
{
HandlingMouse = false;
UpdateHoverState();
base.OnMouseUp(e);
}
protected virtual void UpdateHoverState()
{
circle.Colour = HandlingMouse ? Colours.GrayF : (IsHovered ? Colours.Red : Colours.YellowDark);
this.ScaleTo(HandlingMouse || IsHovered ? 1.5f : 1, 100, Easing.OutQuint);
}
protected void OnOperationStarted() => OperationStarted?.Invoke();
protected void OnOperationEnded() => OperationEnded?.Invoke();
}
}