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osu-lazer/osu.Game/Screens/Edit/Compose/Components/Timeline/TimelineBlueprintContainer.cs
2021-04-27 19:01:29 +09:00

355 lines
13 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 System.Collections.Generic;
using System.Linq;
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.Primitives;
using osu.Framework.Graphics.Shapes;
using osu.Framework.Input.Bindings;
using osu.Framework.Input.Events;
using osu.Framework.Utils;
using osu.Game.Graphics;
using osu.Game.Input.Bindings;
using osu.Game.Rulesets.Edit;
using osu.Game.Rulesets.Objects;
using osu.Game.Screens.Edit.Components.Timelines.Summary.Parts;
using osuTK;
using osuTK.Graphics;
namespace osu.Game.Screens.Edit.Compose.Components.Timeline
{
internal class TimelineBlueprintContainer : EditorBlueprintContainer
{
[Resolved(CanBeNull = true)]
private Timeline timeline { get; set; }
[Resolved]
private OsuColour colours { get; set; }
private DragEvent lastDragEvent;
private Bindable<HitObject> placement;
private SelectionBlueprint<HitObject> placementBlueprint;
private SelectableAreaBackground backgroundBox;
// we only care about checking vertical validity.
// this allows selecting and dragging selections before time=0.
public override bool ReceivePositionalInputAt(Vector2 screenSpacePos)
{
float localY = ToLocalSpace(screenSpacePos).Y;
return DrawRectangle.Top <= localY && DrawRectangle.Bottom >= localY;
}
public TimelineBlueprintContainer(HitObjectComposer composer)
: base(composer)
{
RelativeSizeAxes = Axes.Both;
Anchor = Anchor.Centre;
Origin = Anchor.Centre;
Height = 0.6f;
}
[BackgroundDependencyLoader]
private void load()
{
AddInternal(backgroundBox = new SelectableAreaBackground
{
Colour = Color4.Black,
Depth = float.MaxValue,
Blending = BlendingParameters.Additive,
});
}
protected override void LoadComplete()
{
base.LoadComplete();
DragBox.Alpha = 0;
placement = Beatmap.PlacementObject.GetBoundCopy();
placement.ValueChanged += placementChanged;
}
private void placementChanged(ValueChangedEvent<HitObject> obj)
{
if (obj.NewValue == null)
{
if (placementBlueprint != null)
{
SelectionBlueprints.Remove(placementBlueprint);
placementBlueprint = null;
}
}
else
{
placementBlueprint = CreateBlueprintFor(obj.NewValue);
placementBlueprint.Colour = Color4.MediumPurple;
SelectionBlueprints.Add(placementBlueprint);
}
}
protected override Container<SelectionBlueprint<HitObject>> CreateSelectionBlueprintContainer() => new TimelineSelectionBlueprintContainer { RelativeSizeAxes = Axes.Both };
protected override bool OnHover(HoverEvent e)
{
backgroundBox.FadeColour(colours.BlueLighter, 120, Easing.OutQuint);
return base.OnHover(e);
}
protected override void OnHoverLost(HoverLostEvent e)
{
backgroundBox.FadeColour(Color4.Black, 600, Easing.OutQuint);
base.OnHoverLost(e);
}
protected override void OnDrag(DragEvent e)
{
handleScrollViaDrag(e);
base.OnDrag(e);
}
protected override void OnDragEnd(DragEndEvent e)
{
base.OnDragEnd(e);
lastDragEvent = null;
}
protected override void Update()
{
// trigger every frame so drags continue to update selection while playback is scrolling the timeline.
if (lastDragEvent != null)
OnDrag(lastDragEvent);
if (Composer != null && timeline != null)
{
Composer.Playfield.PastLifetimeExtension = timeline.VisibleRange / 2;
Composer.Playfield.FutureLifetimeExtension = timeline.VisibleRange / 2;
}
base.Update();
updateStacking();
}
private void updateStacking()
{
// because only blueprints of objects which are alive (via pooling) are displayed in the timeline, it's feasible to do this every-update.
const int stack_offset = 5;
// after the stack gets this tall, we can presume there is space underneath to draw subsequent blueprints.
const int stack_reset_count = 3;
Stack<HitObject> currentConcurrentObjects = new Stack<HitObject>();
foreach (var b in SelectionBlueprints.Reverse())
{
// remove objects from the stack as long as their end time is in the past.
while (currentConcurrentObjects.TryPeek(out HitObject hitObject))
{
if (Precision.AlmostBigger(hitObject.GetEndTime(), b.Item.StartTime, 1))
break;
currentConcurrentObjects.Pop();
}
// if the stack gets too high, we should have space below it to display the next batch of objects.
// importantly, we only do this if time has incremented, else a stack of hitobjects all at the same time value would start to overlap themselves.
if (currentConcurrentObjects.TryPeek(out HitObject h) && !Precision.AlmostEquals(h.StartTime, b.Item.StartTime, 1))
{
if (currentConcurrentObjects.Count >= stack_reset_count)
currentConcurrentObjects.Clear();
}
b.Y = -(stack_offset * currentConcurrentObjects.Count);
currentConcurrentObjects.Push(b.Item);
}
}
protected override SelectionHandler<HitObject> CreateSelectionHandler() => new TimelineSelectionHandler();
protected override SelectionBlueprint<HitObject> CreateBlueprintFor(HitObject item)
{
return new TimelineHitObjectBlueprint(item)
{
OnDragHandled = handleScrollViaDrag
};
}
protected override DragBox CreateDragBox(Action<RectangleF> performSelect) => new TimelineDragBox(performSelect);
private void handleScrollViaDrag(DragEvent e)
{
lastDragEvent = e;
if (lastDragEvent == null)
return;
if (timeline != null)
{
var timelineQuad = timeline.ScreenSpaceDrawQuad;
var mouseX = e.ScreenSpaceMousePosition.X;
// scroll if in a drag and dragging outside visible extents
if (mouseX > timelineQuad.TopRight.X)
timeline.ScrollBy((float)((mouseX - timelineQuad.TopRight.X) / 10 * Clock.ElapsedFrameTime));
else if (mouseX < timelineQuad.TopLeft.X)
timeline.ScrollBy((float)((mouseX - timelineQuad.TopLeft.X) / 10 * Clock.ElapsedFrameTime));
}
}
private class SelectableAreaBackground : CompositeDrawable
{
[BackgroundDependencyLoader]
private void load()
{
RelativeSizeAxes = Axes.Both;
Alpha = 0.1f;
AddRangeInternal(new[]
{
// fade out over intro time, outside the valid time bounds.
new Box
{
RelativeSizeAxes = Axes.Y,
Width = 200,
Origin = Anchor.TopRight,
Colour = ColourInfo.GradientHorizontal(Color4.White.Opacity(0), Color4.White),
},
new Box
{
Colour = Color4.White,
RelativeSizeAxes = Axes.Both,
}
});
}
}
internal class TimelineSelectionHandler : EditorSelectionHandler, IKeyBindingHandler<GlobalAction>
{
// for now we always allow movement. snapping is provided by the Timeline's "distance" snap implementation
public override bool HandleMovement(MoveSelectionEvent<HitObject> moveEvent) => true;
public bool OnPressed(GlobalAction action)
{
switch (action)
{
case GlobalAction.EditorNudgeLeft:
nudgeSelection(-1);
return true;
case GlobalAction.EditorNudgeRight:
nudgeSelection(1);
return true;
}
return false;
}
public void OnReleased(GlobalAction action)
{
}
/// <summary>
/// Nudge the current selection by the specified multiple of beat divisor lengths,
/// based on the timing at the first object in the selection.
/// </summary>
/// <param name="amount">The direction and count of beat divisor lengths to adjust.</param>
private void nudgeSelection(int amount)
{
var selected = EditorBeatmap.SelectedHitObjects;
if (selected.Count == 0)
return;
var timingPoint = EditorBeatmap.ControlPointInfo.TimingPointAt(selected.First().StartTime);
double adjustment = timingPoint.BeatLength / EditorBeatmap.BeatDivisor * amount;
EditorBeatmap.PerformOnSelection(h => h.StartTime += adjustment);
}
}
private class TimelineDragBox : DragBox
{
// the following values hold the start and end X positions of the drag box in the timeline's local space,
// but with zoom unapplied in order to be able to compensate for positional changes
// while the timeline is being zoomed in/out.
private float? selectionStart;
private float selectionEnd;
[Resolved]
private Timeline timeline { get; set; }
public TimelineDragBox(Action<RectangleF> performSelect)
: base(performSelect)
{
}
protected override Drawable CreateBox() => new Box
{
RelativeSizeAxes = Axes.Y,
Alpha = 0.3f
};
public override bool HandleDrag(MouseButtonEvent e)
{
selectionStart ??= e.MouseDownPosition.X / timeline.CurrentZoom;
// only calculate end when a transition is not in progress to avoid bouncing.
if (Precision.AlmostEquals(timeline.CurrentZoom, timeline.Zoom))
selectionEnd = e.MousePosition.X / timeline.CurrentZoom;
updateDragBoxPosition();
return true;
}
private void updateDragBoxPosition()
{
if (selectionStart == null)
return;
float rescaledStart = selectionStart.Value * timeline.CurrentZoom;
float rescaledEnd = selectionEnd * timeline.CurrentZoom;
Box.X = Math.Min(rescaledStart, rescaledEnd);
Box.Width = Math.Abs(rescaledStart - rescaledEnd);
var boxScreenRect = Box.ScreenSpaceDrawQuad.AABBFloat;
// we don't care about where the hitobjects are vertically. in cases like stacking display, they may be outside the box without this adjustment.
boxScreenRect.Y -= boxScreenRect.Height;
boxScreenRect.Height *= 2;
PerformSelection?.Invoke(boxScreenRect);
}
public override void Hide()
{
base.Hide();
selectionStart = null;
}
}
protected class TimelineSelectionBlueprintContainer : Container<SelectionBlueprint<HitObject>>
{
protected override Container<SelectionBlueprint<HitObject>> Content { get; }
public TimelineSelectionBlueprintContainer()
{
AddInternal(new TimelinePart<SelectionBlueprint<HitObject>>(Content = new HitObjectOrderedSelectionContainer { RelativeSizeAxes = Axes.Both }) { RelativeSizeAxes = Axes.Both });
}
}
}
}