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osu-lazer/osu.Game/Screens/Edit/Timing/TimingSection.cs
2022-01-22 20:50:32 +01:00

153 lines
5.4 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.Bindables;
using osu.Framework.Graphics;
using osu.Game.Beatmaps.ControlPoints;
using osu.Game.Graphics.UserInterfaceV2;
using osu.Game.Overlays.Settings;
namespace osu.Game.Screens.Edit.Timing
{
internal class TimingSection : Section<TimingControlPoint>
{
private SettingsSlider<double> bpmSlider;
private LabelledTimeSignature timeSignature;
private BPMTextBox bpmTextEntry;
[BackgroundDependencyLoader]
private void load()
{
Flow.AddRange(new Drawable[]
{
bpmTextEntry = new BPMTextBox(),
bpmSlider = new BPMSlider(),
timeSignature = new LabelledTimeSignature
{
Label = "Time Signature"
}
});
}
protected override void OnControlPointChanged(ValueChangedEvent<TimingControlPoint> point)
{
if (point.NewValue != null)
{
bpmSlider.Current = point.NewValue.BeatLengthBindable;
bpmSlider.Current.BindValueChanged(_ => ChangeHandler?.SaveState());
bpmTextEntry.Bindable = point.NewValue.BeatLengthBindable;
// no need to hook change handler here as it's the same bindable as above
timeSignature.Current = point.NewValue.TimeSignatureBindable;
timeSignature.Current.BindValueChanged(_ => ChangeHandler?.SaveState());
}
}
protected override TimingControlPoint CreatePoint()
{
var reference = Beatmap.ControlPointInfo.TimingPointAt(SelectedGroup.Value.Time);
return new TimingControlPoint
{
BeatLength = reference.BeatLength,
TimeSignature = reference.TimeSignature
};
}
private class BPMTextBox : LabelledTextBox
{
private readonly BindableNumber<double> beatLengthBindable = new TimingControlPoint().BeatLengthBindable;
public BPMTextBox()
{
Label = "BPM";
OnCommit += (val, isNew) =>
{
if (!isNew) return;
try
{
if (double.TryParse(Current.Value, out double doubleVal) && doubleVal > 0)
beatLengthBindable.Value = beatLengthToBpm(doubleVal);
}
catch
{
// TriggerChange below will restore the previous text value on failure.
}
// This is run regardless of parsing success as the parsed number may not actually trigger a change
// due to bindable clamping. Even in such a case we want to update the textbox to a sane visual state.
beatLengthBindable.TriggerChange();
};
beatLengthBindable.BindValueChanged(val =>
{
Current.Value = beatLengthToBpm(val.NewValue).ToString("N2");
}, true);
}
public Bindable<double> Bindable
{
get => beatLengthBindable;
set
{
// incoming will be beat length, not bpm
beatLengthBindable.UnbindBindings();
beatLengthBindable.BindTo(value);
}
}
}
private class BPMSlider : SettingsSlider<double>
{
private const double sane_minimum = 60;
private const double sane_maximum = 240;
private readonly BindableNumber<double> beatLengthBindable = new TimingControlPoint().BeatLengthBindable;
private readonly BindableDouble bpmBindable = new BindableDouble(60000 / TimingControlPoint.DEFAULT_BEAT_LENGTH)
{
MinValue = sane_minimum,
MaxValue = sane_maximum,
};
public BPMSlider()
{
beatLengthBindable.BindValueChanged(beatLength => updateCurrent(beatLengthToBpm(beatLength.NewValue)), true);
bpmBindable.BindValueChanged(bpm => beatLengthBindable.Value = beatLengthToBpm(bpm.NewValue));
base.Current = bpmBindable;
TransferValueOnCommit = true;
}
public override Bindable<double> Current
{
get => base.Current;
set
{
// incoming will be beat length, not bpm
beatLengthBindable.UnbindBindings();
beatLengthBindable.BindTo(value);
}
}
private void updateCurrent(double newValue)
{
// we use a more sane range for the slider display unless overridden by the user.
// if a value comes in outside our range, we should expand temporarily.
bpmBindable.MinValue = Math.Min(newValue, sane_minimum);
bpmBindable.MaxValue = Math.Max(newValue, sane_maximum);
bpmBindable.Value = newValue;
}
}
private static double beatLengthToBpm(double beatLength) => 60000 / beatLength;
}
}