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osu-lazer/osu.Game/Screens/Edit/Compose/Components/Timeline/Timeline.cs
2020-04-09 20:25:26 +09:00

201 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;
using osu.Framework.Allocation;
using osu.Framework.Audio.Track;
using osu.Framework.Bindables;
using osu.Framework.Extensions.Color4Extensions;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Audio;
using osu.Framework.Input.Events;
using osu.Framework.Timing;
using osu.Game.Beatmaps;
using osu.Game.Graphics;
using osu.Game.Rulesets.Edit;
using osuTK;
namespace osu.Game.Screens.Edit.Compose.Components.Timeline
{
[Cached(typeof(IDistanceSnapProvider))]
[Cached]
public class Timeline : ZoomableScrollContainer, IDistanceSnapProvider
{
public readonly Bindable<bool> WaveformVisible = new Bindable<bool>();
public readonly IBindable<WorkingBeatmap> Beatmap = new Bindable<WorkingBeatmap>();
[Resolved]
private IAdjustableClock adjustableClock { get; set; }
public Timeline()
{
ZoomDuration = 200;
ZoomEasing = Easing.OutQuint;
ScrollbarVisible = false;
}
private WaveformGraph waveform;
[BackgroundDependencyLoader]
private void load(IBindable<WorkingBeatmap> beatmap, OsuColour colours)
{
Add(waveform = new WaveformGraph
{
RelativeSizeAxes = Axes.Both,
Colour = colours.Blue.Opacity(0.2f),
LowColour = colours.BlueLighter,
MidColour = colours.BlueDark,
HighColour = colours.BlueDarker,
Depth = float.MaxValue
});
// We don't want the centre marker to scroll
AddInternal(new CentreMarker());
WaveformVisible.ValueChanged += visible => waveform.FadeTo(visible.NewValue ? 1 : 0, 200, Easing.OutQuint);
Beatmap.BindTo(beatmap);
Beatmap.BindValueChanged(b =>
{
waveform.Waveform = b.NewValue.Waveform;
track = b.NewValue.Track;
MaxZoom = getZoomLevelForVisibleMilliseconds(500);
MinZoom = getZoomLevelForVisibleMilliseconds(10000);
Zoom = getZoomLevelForVisibleMilliseconds(2000);
}, true);
}
private float getZoomLevelForVisibleMilliseconds(double milliseconds) => (float)(track.Length / milliseconds);
/// <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;
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
Content.Margin = new MarginPadding { Horizontal = DrawWidth / 2 };
// This needs to happen after transforms are updated, but before the scroll position is updated in base.UpdateAfterChildren
if (adjustableClock.IsRunning)
scrollToTrackTime();
}
protected override void UpdateAfterChildren()
{
base.UpdateAfterChildren();
if (handlingDragInput)
seekTrackToCurrent();
else if (!adjustableClock.IsRunning)
{
// The track isn't running. There are two cases we have to be wary of:
// 1) The user flick-drags on this timeline: We want the track to follow us
// 2) The user changes the track time through some other means (scrolling in the editor or overview timeline): We want to follow the track time
// The simplest way to cover both cases is by checking whether the scroll position has changed and the audio hasn't been changed externally
if (Current != lastScrollPosition && adjustableClock.CurrentTime == lastTrackTime)
seekTrackToCurrent();
else
scrollToTrackTime();
}
lastScrollPosition = Current;
lastTrackTime = adjustableClock.CurrentTime;
}
private void seekTrackToCurrent()
{
if (!track.IsLoaded)
return;
adjustableClock.Seek(Current / Content.DrawWidth * track.Length);
}
private void scrollToTrackTime()
{
if (!track.IsLoaded)
return;
ScrollTo((float)(adjustableClock.CurrentTime / track.Length) * Content.DrawWidth, false);
}
protected override bool OnMouseDown(MouseDownEvent e)
{
if (base.OnMouseDown(e))
{
beginUserDrag();
return true;
}
return false;
}
protected override void OnMouseUp(MouseUpEvent e)
{
endUserDrag();
base.OnMouseUp(e);
}
private void beginUserDrag()
{
handlingDragInput = true;
trackWasPlaying = adjustableClock.IsRunning;
adjustableClock.Stop();
}
private void endUserDrag()
{
handlingDragInput = false;
if (trackWasPlaying)
adjustableClock.Start();
}
[Resolved]
private EditorBeatmap beatmap { get; set; }
[Resolved]
private IBeatSnapProvider beatSnapProvider { get; set; }
public double GetTimeFromScreenSpacePosition(Vector2 position)
=> getTimeFromPosition(Content.ToLocalSpace(position));
public (Vector2 position, double time) GetSnappedPosition(Vector2 position, double time) =>
(position, beatSnapProvider.SnapTime(getTimeFromPosition(position)));
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();
}
}