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osu-lazer/osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/Components/PathControlPointPiece.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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#nullable disable
using System;
using System.Collections.Generic;
using System.Linq;
using JetBrains.Annotations;
using osu.Framework.Allocation;
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using osu.Framework.Bindables;
using osu.Framework.Extensions.Color4Extensions;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
using osu.Framework.Graphics.Cursor;
using osu.Framework.Graphics.Primitives;
using osu.Framework.Graphics.Shapes;
using osu.Framework.Input.Events;
using osu.Framework.Localisation;
using osu.Framework.Utils;
using osu.Game.Graphics;
using osu.Game.Rulesets.Objects;
using osu.Game.Rulesets.Objects.Types;
using osu.Game.Rulesets.Osu.Objects;
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using osuTK;
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using osuTK.Graphics;
using osuTK.Input;
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namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
{
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/// <summary>
/// A visualisation of a single <see cref="PathControlPoint"/> in an osu hit object with a path.
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/// </summary>
/// <typeparam name="T">The type of <see cref="OsuHitObject"/> which this <see cref="PathControlPointPiece{T}"/> visualises.</typeparam>
public partial class PathControlPointPiece<T> : BlueprintPiece<T>, IHasTooltip where T : OsuHitObject, IHasPath
{
public Action<PathControlPointPiece<T>, MouseButtonEvent> RequestSelection;
public Action<PathControlPoint> DragStarted;
public Action<DragEvent> DragInProgress;
public Action DragEnded;
public List<PathControlPoint> PointsInSegment;
public readonly BindableBool IsSelected = new BindableBool();
public readonly PathControlPoint ControlPoint;
private readonly T hitObject;
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private readonly Container marker;
private readonly Drawable markerRing;
[Resolved]
private OsuColour colours { get; set; }
private IBindable<Vector2> hitObjectPosition;
private IBindable<float> hitObjectScale;
[UsedImplicitly]
private readonly IBindable<int> hitObjectVersion;
public PathControlPointPiece(T hitObject, PathControlPoint controlPoint)
{
this.hitObject = hitObject;
ControlPoint = controlPoint;
// we don't want to run the path type update on construction as it may inadvertently change the hit object.
cachePoints(hitObject);
hitObjectVersion = hitObject.Path.Version.GetBoundCopy();
// schedule ensure that updates are only applied after all operations from a single frame are applied.
// this avoids inadvertently changing the hit object path type for batch operations.
hitObjectVersion.BindValueChanged(_ => Scheduler.AddOnce(() =>
{
cachePoints(hitObject);
updatePathType();
}));
controlPoint.Changed += updateMarkerDisplay;
Origin = Anchor.Centre;
AutoSizeAxes = Axes.Both;
InternalChildren = new Drawable[]
{
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marker = new Container
{
Anchor = Anchor.Centre,
Origin = Anchor.Centre,
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AutoSizeAxes = Axes.Both,
Children = new[]
{
new Circle
{
Anchor = Anchor.Centre,
Origin = Anchor.Centre,
Size = new Vector2(20),
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},
markerRing = new CircularContainer
{
Anchor = Anchor.Centre,
Origin = Anchor.Centre,
Size = new Vector2(28),
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Masking = true,
BorderThickness = 2,
BorderColour = Color4.White,
Alpha = 0,
Child = new Box
{
RelativeSizeAxes = Axes.Both,
Alpha = 0,
AlwaysPresent = true
}
}
}
}
};
}
protected override void LoadComplete()
{
base.LoadComplete();
hitObjectPosition = hitObject.PositionBindable.GetBoundCopy();
hitObjectPosition.BindValueChanged(_ => updateMarkerDisplay());
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hitObjectScale = hitObject.ScaleBindable.GetBoundCopy();
hitObjectScale.BindValueChanged(_ => updateMarkerDisplay());
IsSelected.BindValueChanged(_ => updateMarkerDisplay());
updateMarkerDisplay();
}
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// The connecting path is excluded from positional input
public override bool ReceivePositionalInputAt(Vector2 screenSpacePos) => marker.ReceivePositionalInputAt(screenSpacePos);
protected override bool OnHover(HoverEvent e)
{
updateMarkerDisplay();
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return false;
}
protected override void OnHoverLost(HoverLostEvent e)
{
updateMarkerDisplay();
}
// Used to pair up mouse down/drag events with their corresponding mouse up events,
// to avoid deselecting the piece by accident when the mouse up corresponding to the mouse down/drag fires.
private bool keepSelection;
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protected override bool OnMouseDown(MouseDownEvent e)
{
if (RequestSelection == null)
return false;
switch (e.Button)
{
case MouseButton.Left:
// if control is pressed, do not do anything as the user may be adding to current selection
// or dragging all currently selected control points.
// if it isn't and the user's intent is to deselect, deselection will happen on mouse up.
if (e.ControlPressed && IsSelected.Value)
return true;
RequestSelection.Invoke(this, e);
keepSelection = true;
return true;
case MouseButton.Right:
if (!IsSelected.Value)
RequestSelection.Invoke(this, e);
keepSelection = true;
return false; // Allow context menu to show
}
return false;
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}
protected override void OnMouseUp(MouseUpEvent e)
{
base.OnMouseUp(e);
// ctrl+click deselects this piece, but only if this event
// wasn't immediately preceded by a matching mouse down or drag.
if (IsSelected.Value && e.ControlPressed && !keepSelection)
IsSelected.Value = false;
keepSelection = false;
}
protected override bool OnClick(ClickEvent e) => RequestSelection != null;
protected override bool OnDragStart(DragStartEvent e)
{
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if (RequestSelection == null)
return false;
if (e.Button == MouseButton.Left)
{
DragStarted?.Invoke(ControlPoint);
keepSelection = true;
return true;
}
return false;
}
protected override void OnDrag(DragEvent e) => DragInProgress?.Invoke(e);
protected override void OnDragEnd(DragEndEvent e) => DragEnded?.Invoke();
private void cachePoints(T hitObject) => PointsInSegment = hitObject.Path.PointsInSegment(ControlPoint);
/// <summary>
/// Handles correction of invalid path types.
/// </summary>
private void updatePathType()
{
if (ControlPoint.Type != PathType.PerfectCurve)
return;
if (PointsInSegment.Count > 3)
ControlPoint.Type = PathType.Bezier;
if (PointsInSegment.Count != 3)
return;
ReadOnlySpan<Vector2> points = PointsInSegment.Select(p => p.Position).ToArray();
RectangleF boundingBox = PathApproximator.CircularArcBoundingBox(points);
if (boundingBox.Width >= 640 || boundingBox.Height >= 480)
ControlPoint.Type = PathType.Bezier;
}
/// <summary>
/// Updates the state of the circular control point marker.
/// </summary>
private void updateMarkerDisplay()
{
Position = hitObject.StackedPosition + ControlPoint.Position;
markerRing.Alpha = IsSelected.Value ? 1 : 0;
Color4 colour = getColourFromNodeType();
if (IsHovered || IsSelected.Value)
colour = colour.Lighten(1);
marker.Colour = colour;
marker.Scale = new Vector2(hitObject.Scale);
}
private Color4 getColourFromNodeType()
{
if (!(ControlPoint.Type is PathType pathType))
return colours.Yellow;
switch (pathType)
{
case PathType.Catmull:
return colours.SeaFoam;
case PathType.Bezier:
return colours.Pink;
case PathType.PerfectCurve:
return colours.PurpleDark;
default:
return colours.Red;
}
}
public LocalisableString TooltipText => ControlPoint.Type.ToString() ?? string.Empty;
}
}