osu/osu.Game/Graphics/UserInterface/OsuSliderBar.cs
2019-02-28 14:32:57 +09:00

216 lines
7.1 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.Globalization;
using osuTK;
using osuTK.Graphics;
using osu.Framework.Allocation;
using osu.Framework.Audio;
using osu.Framework.Audio.Sample;
using osu.Framework.Graphics;
using osu.Framework.Graphics.UserInterface;
using osu.Framework.Graphics.Cursor;
using osu.Framework.Graphics.Shapes;
using osu.Framework.Input.Events;
namespace osu.Game.Graphics.UserInterface
{
public class OsuSliderBar<T> : SliderBar<T>, IHasTooltip, IHasAccentColour
where T : struct, IEquatable<T>, IComparable, IConvertible
{
/// <summary>
/// Maximum number of decimal digits to be displayed in the tooltip.
/// </summary>
private const int max_decimal_digits = 5;
private SampleChannel sample;
private double lastSampleTime;
private T lastSampleValue;
protected readonly Nub Nub;
private readonly Box leftBox;
private readonly Box rightBox;
public virtual string TooltipText { get; private set; }
private Color4 accentColour;
public Color4 AccentColour
{
get => accentColour;
set
{
accentColour = value;
leftBox.Colour = value;
rightBox.Colour = value;
}
}
public OsuSliderBar()
{
Height = 12;
RangePadding = 20;
Children = new Drawable[]
{
leftBox = new Box
{
Height = 2,
EdgeSmoothness = new Vector2(0, 0.5f),
Position = new Vector2(2, 0),
RelativeSizeAxes = Axes.None,
Anchor = Anchor.CentreLeft,
Origin = Anchor.CentreLeft,
},
rightBox = new Box
{
Height = 2,
EdgeSmoothness = new Vector2(0, 0.5f),
Position = new Vector2(-2, 0),
RelativeSizeAxes = Axes.None,
Anchor = Anchor.CentreRight,
Origin = Anchor.CentreRight,
Alpha = 0.5f,
},
Nub = new Nub
{
Origin = Anchor.TopCentre,
Expanded = true,
},
new HoverClickSounds()
};
Current.DisabledChanged += disabled => { Alpha = disabled ? 0.3f : 1; };
}
[BackgroundDependencyLoader]
private void load(AudioManager audio, OsuColour colours)
{
sample = audio.Sample.Get(@"UI/sliderbar-notch");
AccentColour = colours.Pink;
}
protected override void LoadComplete()
{
base.LoadComplete();
CurrentNumber.BindValueChanged(current => updateTooltipText(current.NewValue), true);
}
protected override bool OnHover(HoverEvent e)
{
Nub.Glowing = true;
return base.OnHover(e);
}
protected override void OnHoverLost(HoverLostEvent e)
{
Nub.Glowing = false;
base.OnHoverLost(e);
}
protected override bool OnMouseDown(MouseDownEvent e)
{
Nub.Current.Value = true;
return base.OnMouseDown(e);
}
protected override bool OnMouseUp(MouseUpEvent e)
{
Nub.Current.Value = false;
return base.OnMouseUp(e);
}
protected override void OnUserChange(T value)
{
base.OnUserChange(value);
playSample(value);
updateTooltipText(value);
}
private void playSample(T value)
{
if (Clock == null || Clock.CurrentTime - lastSampleTime <= 50)
return;
if (value.Equals(lastSampleValue))
return;
lastSampleValue = value;
lastSampleTime = Clock.CurrentTime;
sample.Frequency.Value = 1 + NormalizedValue * 0.2f;
if (NormalizedValue == 0)
sample.Frequency.Value -= 0.4f;
else if (NormalizedValue == 1)
sample.Frequency.Value += 0.4f;
sample.Play();
}
private void updateTooltipText(T value)
{
if (CurrentNumber.IsInteger)
TooltipText = ((int)Convert.ChangeType(value, typeof(int))).ToString("N0");
else
{
double floatValue = (double)Convert.ChangeType(value, typeof(double));
double floatMinValue = (double)Convert.ChangeType(CurrentNumber.MinValue, typeof(double));
double floatMaxValue = (double)Convert.ChangeType(CurrentNumber.MaxValue, typeof(double));
if (floatMaxValue == 1 && floatMinValue >= -1)
TooltipText = floatValue.ToString("P0");
else
{
var decimalPrecision = normalise((decimal)Convert.ChangeType(CurrentNumber.Precision, typeof(decimal)), max_decimal_digits);
// Find the number of significant digits (we could have less than 5 after normalize())
var significantDigits = findPrecision(decimalPrecision);
TooltipText = floatValue.ToString($"N{significantDigits}");
}
}
}
protected override void UpdateAfterChildren()
{
base.UpdateAfterChildren();
leftBox.Scale = new Vector2(MathHelper.Clamp(
Nub.DrawPosition.X - Nub.DrawWidth / 2, 0, DrawWidth), 1);
rightBox.Scale = new Vector2(MathHelper.Clamp(
DrawWidth - Nub.DrawPosition.X - Nub.DrawWidth / 2, 0, DrawWidth), 1);
}
protected override void UpdateValue(float value)
{
Nub.MoveToX(RangePadding + UsableWidth * value, 250, Easing.OutQuint);
}
/// <summary>
/// Removes all non-significant digits, keeping at most a requested number of decimal digits.
/// </summary>
/// <param name="d">The decimal to normalize.</param>
/// <param name="sd">The maximum number of decimal digits to keep. The final result may have fewer decimal digits than this value.</param>
/// <returns>The normalised decimal.</returns>
private decimal normalise(decimal d, int sd)
=> decimal.Parse(Math.Round(d, sd).ToString(string.Concat("0.", new string('#', sd)), CultureInfo.InvariantCulture), CultureInfo.InvariantCulture);
/// <summary>
/// Finds the number of digits after the decimal.
/// </summary>
/// <param name="d">The value to find the number of decimal digits for.</param>
/// <returns>The number decimal digits.</returns>
private int findPrecision(decimal d)
{
int precision = 0;
while (d != Math.Round(d))
{
d *= 10;
precision++;
}
return precision;
}
}
}