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osu-lazer/osu.Game/Screens/Edit/Timing/TimingSection.cs

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2019-10-28 11:42:17 +08:00
// 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 osu.Framework.Allocation;
using osu.Framework.Bindables;
using osu.Framework.Graphics;
using osu.Game.Beatmaps.ControlPoints;
using osu.Game.Beatmaps.Timing;
using osu.Game.Overlays.Settings;
namespace osu.Game.Screens.Edit.Timing
{
internal class TimingSection : Section<TimingControlPoint>
{
private SettingsSlider<double> bpm;
private SettingsEnumDropdown<TimeSignatures> timeSignature;
[BackgroundDependencyLoader]
private void load()
{
Flow.AddRange(new Drawable[]
{
bpm = new BPMSlider
{
Bindable = new TimingControlPoint().BeatLengthBindable,
LabelText = "BPM",
},
timeSignature = new SettingsEnumDropdown<TimeSignatures>
{
LabelText = "Time Signature"
},
});
}
protected override void OnControlPointChanged(ValueChangedEvent<TimingControlPoint> point)
{
if (point.NewValue != null)
{
bpm.Bindable = point.NewValue.BeatLengthBindable;
timeSignature.Bindable = point.NewValue.TimeSignatureBindable;
}
}
protected override TimingControlPoint CreatePoint()
{
var reference = Beatmap.Value.Beatmap.ControlPointInfo.TimingPointAt(SelectedGroup.Value.Time);
return new TimingControlPoint
{
BeatLength = reference.BeatLength,
TimeSignature = reference.TimeSignature
};
}
private class BPMSlider : SettingsSlider<double>
{
private readonly BindableDouble beatLengthBindable = new BindableDouble();
private BindableDouble bpmBindable;
public override Bindable<double> Bindable
{
get => base.Bindable;
set
{
// incoming will be beatlength
beatLengthBindable.UnbindBindings();
beatLengthBindable.BindTo(value);
base.Bindable = bpmBindable = new BindableDouble(beatLengthToBpm(beatLengthBindable.Value))
{
MinValue = beatLengthToBpm(beatLengthBindable.MaxValue),
MaxValue = beatLengthToBpm(beatLengthBindable.MinValue),
Default = beatLengthToBpm(beatLengthBindable.Default),
};
bpmBindable.BindValueChanged(bpm => beatLengthBindable.Value = beatLengthToBpm(bpm.NewValue));
}
}
private double beatLengthToBpm(double beatLength) => 60000 / beatLength;
}
}
}