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osu-lazer/osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/SliderSelectionBlueprint.cs
2020-01-24 17:50:09 +09:00

180 lines
6.9 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.Collections.Generic;
using System.Diagnostics;
using osu.Framework.Allocation;
using osu.Framework.Bindables;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Primitives;
using osu.Framework.Graphics.UserInterface;
using osu.Framework.Input.Events;
using osu.Game.Graphics.UserInterface;
using osu.Game.Rulesets.Edit;
using osu.Game.Rulesets.Objects;
using osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components;
using osu.Game.Rulesets.Osu.Objects;
using osu.Game.Rulesets.Osu.Objects.Drawables;
using osu.Game.Screens.Edit.Compose;
using osuTK;
using osuTK.Input;
namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
{
public class SliderSelectionBlueprint : OsuSelectionBlueprint<Slider>
{
protected readonly SliderBodyPiece BodyPiece;
protected readonly SliderCircleSelectionBlueprint HeadBlueprint;
protected readonly SliderCircleSelectionBlueprint TailBlueprint;
protected readonly PathControlPointVisualiser ControlPointVisualiser;
[Resolved(CanBeNull = true)]
private HitObjectComposer composer { get; set; }
[Resolved(CanBeNull = true)]
private IPlacementHandler placementHandler { get; set; }
public SliderSelectionBlueprint(DrawableSlider slider)
: base(slider)
{
var sliderObject = (Slider)slider.HitObject;
InternalChildren = new Drawable[]
{
BodyPiece = new SliderBodyPiece(),
HeadBlueprint = CreateCircleSelectionBlueprint(slider, SliderPosition.Start),
TailBlueprint = CreateCircleSelectionBlueprint(slider, SliderPosition.End),
ControlPointVisualiser = new PathControlPointVisualiser(sliderObject, true)
{
RemoveControlPointsRequested = removeControlPoints
}
};
}
private IBindable<int> pathVersion;
protected override void LoadComplete()
{
base.LoadComplete();
pathVersion = HitObject.Path.Version.GetBoundCopy();
pathVersion.BindValueChanged(_ => updatePath());
}
protected override void Update()
{
base.Update();
BodyPiece.UpdateFrom(HitObject);
}
private Vector2 rightClickPosition;
protected override bool OnMouseDown(MouseDownEvent e)
{
switch (e.Button)
{
case MouseButton.Right:
rightClickPosition = e.MouseDownPosition;
return false; // Allow right click to be handled by context menu
case MouseButton.Left when e.ControlPressed && IsSelected:
placementControlPointIndex = addControlPoint(e.MousePosition);
return true; // Stop input from being handled and modifying the selection
}
return false;
}
private int? placementControlPointIndex;
protected override bool OnDragStart(DragStartEvent e) => placementControlPointIndex != null;
protected override void OnDrag(DragEvent e)
{
Debug.Assert(placementControlPointIndex != null);
HitObject.Path.ControlPoints[placementControlPointIndex.Value].Position.Value = e.MousePosition - HitObject.Position;
}
protected override void OnDragEnd(DragEndEvent e)
{
placementControlPointIndex = null;
}
private BindableList<PathControlPoint> controlPoints => HitObject.Path.ControlPoints;
private int addControlPoint(Vector2 position)
{
position -= HitObject.Position;
int insertionIndex = 0;
float minDistance = float.MaxValue;
for (int i = 0; i < controlPoints.Count - 1; i++)
{
float dist = new Line(controlPoints[i].Position.Value, controlPoints[i + 1].Position.Value).DistanceToPoint(position);
if (dist < minDistance)
{
insertionIndex = i + 1;
minDistance = dist;
}
}
// Move the control points from the insertion index onwards to make room for the insertion
controlPoints.Insert(insertionIndex, new PathControlPoint { Position = { Value = position } });
return insertionIndex;
}
private void removeControlPoints(List<PathControlPoint> toRemove)
{
// Ensure that there are any points to be deleted
if (toRemove.Count == 0)
return;
foreach (var c in toRemove)
{
// The first control point in the slider must have a type, so take it from the previous "first" one
// Todo: Should be handled within SliderPath itself
if (c == controlPoints[0] && controlPoints.Count > 1 && controlPoints[1].Type.Value == null)
controlPoints[1].Type.Value = controlPoints[0].Type.Value;
controlPoints.Remove(c);
}
// If there are 0 or 1 remaining control points, the slider is in a degenerate (single point) form and should be deleted
if (controlPoints.Count <= 1)
{
placementHandler?.Delete(HitObject);
return;
}
// The path will have a non-zero offset if the head is removed, but sliders don't support this behaviour since the head is positioned at the slider's position
// So the slider needs to be offset by this amount instead, and all control points offset backwards such that the path is re-positioned at (0, 0)
Vector2 first = controlPoints[0].Position.Value;
foreach (var c in controlPoints)
c.Position.Value -= first;
HitObject.Position += first;
}
private void updatePath()
{
HitObject.Path.ExpectedDistance.Value = composer?.GetSnappedDistanceFromDistance(HitObject.StartTime, (float)HitObject.Path.CalculatedDistance) ?? (float)HitObject.Path.CalculatedDistance;
UpdateHitObject();
}
public override MenuItem[] ContextMenuItems => new MenuItem[]
{
new OsuMenuItem("Add control point", MenuItemType.Standard, () => addControlPoint(rightClickPosition)),
};
public override Vector2 SelectionPoint => ((DrawableSlider)DrawableObject).HeadCircle.ScreenSpaceDrawQuad.Centre;
public override bool ReceivePositionalInputAt(Vector2 screenSpacePos) => BodyPiece.ReceivePositionalInputAt(screenSpacePos);
protected virtual SliderCircleSelectionBlueprint CreateCircleSelectionBlueprint(DrawableSlider slider, SliderPosition position) => new SliderCircleSelectionBlueprint(slider, position);
}
}