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osu-lazer/osu.Game/Screens/Edit/Compose/Components/Timeline/Timeline.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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using System;
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using osu.Framework.Allocation;
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using osu.Framework.Audio.Track;
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using osu.Framework.Bindables;
using osu.Framework.Extensions.Color4Extensions;
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using osu.Framework.Graphics;
using osu.Framework.Graphics.Audio;
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.Beatmaps;
using osu.Game.Configuration;
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using osu.Game.Graphics;
using osu.Game.Rulesets.Edit;
using osuTK;
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namespace osu.Game.Screens.Edit.Compose.Components.Timeline
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{
[Cached(typeof(IPositionSnapProvider))]
[Cached]
public class Timeline : ZoomableScrollContainer, IPositionSnapProvider
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{
private readonly Drawable userContent;
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public readonly Bindable<bool> WaveformVisible = new Bindable<bool>();
public readonly Bindable<bool> ControlPointsVisible = new Bindable<bool>();
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public readonly Bindable<bool> TicksVisible = new Bindable<bool>();
public readonly IBindable<WorkingBeatmap> Beatmap = new Bindable<WorkingBeatmap>();
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[Resolved]
private EditorClock editorClock { get; set; }
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/// <summary>
/// The timeline's scroll position in the last frame.
/// </summary>
private float lastScrollPosition;
/// <summary>
/// The track time in the last frame.
/// </summary>
private double lastTrackTime;
/// <summary>
/// Whether the user is currently dragging the timeline.
/// </summary>
private bool handlingDragInput;
/// <summary>
/// Whether the track was playing before a user drag event.
/// </summary>
private bool trackWasPlaying;
private Track track;
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private const float timeline_height = 72;
private const float timeline_expanded_height = 156;
public Timeline(Drawable userContent)
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{
this.userContent = userContent;
RelativeSizeAxes = Axes.X;
Height = timeline_height;
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ZoomDuration = 200;
ZoomEasing = Easing.OutQuint;
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ScrollbarVisible = false;
}
private WaveformGraph waveform;
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private TimelineTickDisplay ticks;
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private TimelineControlPointDisplay controlPoints;
private Container mainContent;
private Bindable<float> waveformOpacity;
[BackgroundDependencyLoader]
private void load(IBindable<WorkingBeatmap> beatmap, OsuColour colours, OsuConfigManager config)
{
CentreMarker centreMarker;
// We don't want the centre marker to scroll
AddInternal(centreMarker = new CentreMarker());
AddRange(new Drawable[]
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{
controlPoints = new TimelineControlPointDisplay
{
RelativeSizeAxes = Axes.X,
Height = timeline_expanded_height,
},
mainContent = new Container
{
RelativeSizeAxes = Axes.X,
Height = timeline_height,
Depth = float.MaxValue,
Children = new[]
{
waveform = new WaveformGraph
{
RelativeSizeAxes = Axes.Both,
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BaseColour = colours.Blue.Opacity(0.2f),
LowColour = colours.BlueLighter,
MidColour = colours.BlueDark,
HighColour = colours.BlueDarker,
},
centreMarker.CreateProxy(),
ticks = new TimelineTickDisplay(),
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new Box
{
Name = "zero marker",
RelativeSizeAxes = Axes.Y,
Width = 2,
Origin = Anchor.TopCentre,
Colour = colours.YellowDarker,
},
userContent,
}
},
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});
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waveformOpacity = config.GetBindable<float>(OsuSetting.EditorWaveformOpacity);
Beatmap.BindTo(beatmap);
Beatmap.BindValueChanged(b =>
{
waveform.Waveform = b.NewValue.Waveform;
track = b.NewValue.Track;
// todo: i don't think this is safe, the track may not be loaded yet.
if (track.Length > 0)
{
MaxZoom = getZoomLevelForVisibleMilliseconds(500);
MinZoom = getZoomLevelForVisibleMilliseconds(10000);
Zoom = getZoomLevelForVisibleMilliseconds(2000);
}
}, true);
}
protected override void LoadComplete()
{
base.LoadComplete();
waveformOpacity.BindValueChanged(_ => updateWaveformOpacity(), true);
WaveformVisible.ValueChanged += _ => updateWaveformOpacity();
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TicksVisible.ValueChanged += visible => ticks.FadeTo(visible.NewValue ? 1 : 0, 200, Easing.OutQuint);
ControlPointsVisible.BindValueChanged(visible =>
{
if (visible.NewValue)
{
this.ResizeHeightTo(timeline_expanded_height, 200, Easing.OutQuint);
mainContent.MoveToY(36, 200, Easing.OutQuint);
// delay the fade in else masking looks weird.
controlPoints.Delay(180).FadeIn(400, Easing.OutQuint);
}
else
{
controlPoints.FadeOut(200, Easing.OutQuint);
// likewise, delay the resize until the fade is complete.
this.Delay(180).ResizeHeightTo(timeline_height, 200, Easing.OutQuint);
mainContent.Delay(180).MoveToY(0, 200, Easing.OutQuint);
}
}, true);
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}
private void updateWaveformOpacity() =>
waveform.FadeTo(WaveformVisible.Value ? waveformOpacity.Value : 0, 200, Easing.OutQuint);
private float getZoomLevelForVisibleMilliseconds(double milliseconds) => Math.Max(1, (float)(track.Length / milliseconds));
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protected override void Update()
{
base.Update();
// The extrema of track time should be positioned at the centre of the container when scrolled to the start or end
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Content.Margin = new MarginPadding { Horizontal = DrawWidth / 2 };
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// This needs to happen after transforms are updated, but before the scroll position is updated in base.UpdateAfterChildren
if (editorClock.IsRunning)
scrollToTrackTime();
}
protected override bool OnScroll(ScrollEvent e)
{
// if this is not a precision scroll event, let the editor handle the seek itself (for snapping support)
if (!e.AltPressed && !e.IsPrecise)
return false;
return base.OnScroll(e);
}
protected override void UpdateAfterChildren()
{
base.UpdateAfterChildren();
if (handlingDragInput)
seekTrackToCurrent();
else if (!editorClock.IsRunning)
{
// The track isn't running. There are three cases we have to be wary of:
// 1) The user flick-drags on this timeline and we are applying an interpolated seek on the clock, until interrupted by 2 or 3.
// 2) The user changes the track time through some other means (scrolling in the editor or overview timeline; clicking a hitobject etc.). We want the timeline to track the clock's time.
// 3) An ongoing seek transform is running from an external seek. We want the timeline to track the clock's time.
// The simplest way to cover the first two cases is by checking whether the scroll position has changed and the audio hasn't been changed externally
// Checking IsSeeking covers the third case, where the transform may not have been applied yet.
if (Current != lastScrollPosition && editorClock.CurrentTime == lastTrackTime && !editorClock.IsSeeking)
seekTrackToCurrent();
else
scrollToTrackTime();
}
lastScrollPosition = Current;
lastTrackTime = editorClock.CurrentTime;
}
private void seekTrackToCurrent()
{
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if (!track.IsLoaded)
return;
double target = Current / Content.DrawWidth * track.Length;
editorClock.Seek(Math.Min(track.Length, target));
}
private void scrollToTrackTime()
{
if (!track.IsLoaded || track.Length == 0)
return;
// covers the case where the user starts playback after a drag is in progress.
// we want to ensure the clock is always stopped during drags to avoid weird audio playback.
if (handlingDragInput)
editorClock.Stop();
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ScrollTo((float)(editorClock.CurrentTime / track.Length) * Content.DrawWidth, false);
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}
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protected override bool OnMouseDown(MouseDownEvent e)
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{
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if (base.OnMouseDown(e))
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{
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beginUserDrag();
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return true;
}
return false;
}
protected override void OnMouseUp(MouseUpEvent e)
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{
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endUserDrag();
base.OnMouseUp(e);
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}
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private void beginUserDrag()
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{
handlingDragInput = true;
trackWasPlaying = editorClock.IsRunning;
editorClock.Stop();
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}
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private void endUserDrag()
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{
handlingDragInput = false;
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if (trackWasPlaying)
editorClock.Start();
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}
[Resolved]
private EditorBeatmap beatmap { get; set; }
[Resolved]
private IBeatSnapProvider beatSnapProvider { get; set; }
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/// <summary>
/// The total amount of time visible on the timeline.
/// </summary>
public double VisibleRange => track.Length / Zoom;
public SnapResult SnapScreenSpacePositionToValidPosition(Vector2 screenSpacePosition) =>
new SnapResult(screenSpacePosition, null);
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public SnapResult SnapScreenSpacePositionToValidTime(Vector2 screenSpacePosition) =>
new SnapResult(screenSpacePosition, beatSnapProvider.SnapTime(getTimeFromPosition(Content.ToLocalSpace(screenSpacePosition))));
private double getTimeFromPosition(Vector2 localPosition) =>
(localPosition.X / Content.DrawWidth) * track.Length;
public float GetBeatSnapDistanceAt(double referenceTime) => throw new NotImplementedException();
public float DurationToDistance(double referenceTime, double duration) => throw new NotImplementedException();
public double DistanceToDuration(double referenceTime, float distance) => throw new NotImplementedException();
public double GetSnappedDurationFromDistance(double referenceTime, float distance) => throw new NotImplementedException();
public float GetSnappedDistanceFromDistance(double referenceTime, float distance) => throw new NotImplementedException();
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}
}