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