osu/osu.Game/Graphics/UserInterface/OsuSliderBar.cs

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C#
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2018-04-13 09:19:50 +00:00
// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
using System;
using System.Globalization;
using OpenTK;
using OpenTK.Graphics;
using osu.Framework.Allocation;
using osu.Framework.Audio;
using osu.Framework.Audio.Sample;
using osu.Framework.Configuration;
using osu.Framework.Graphics;
using osu.Framework.Graphics.UserInterface;
using osu.Framework.Input;
using osu.Framework.Graphics.Cursor;
using osu.Framework.Graphics.Shapes;
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
{
var bindableDouble = CurrentNumber as BindableNumber<double>;
var bindableFloat = CurrentNumber as BindableNumber<float>;
var floatValue = bindableDouble?.Value ?? bindableFloat?.Value;
var floatPrecision = bindableDouble?.Precision ?? bindableFloat?.Precision;
if (floatValue != null)
{
var floatMinValue = bindableDouble?.MinValue ?? bindableFloat.MinValue;
var floatMaxValue = bindableDouble?.MaxValue ?? bindableFloat.MaxValue;
if (floatMaxValue == 1 && (floatMinValue == 0 || floatMinValue == -1))
return floatValue.Value.ToString("P0");
var decimalPrecision = normalise((decimal)floatPrecision, max_decimal_digits);
// Find the number of significant digits (we could have less than 5 after normalize())
var significantDigits = findPrecision(decimalPrecision);
return floatValue.Value.ToString($"N{significantDigits}");
}
var bindableInt = CurrentNumber as BindableNumber<int>;
if (bindableInt != null)
return bindableInt.Value.ToString("N0");
return Current.Value.ToString(CultureInfo.InvariantCulture);
}
}
private Color4 accentColour;
public Color4 AccentColour
{
get { return 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 bool OnHover(InputState state)
{
Nub.Glowing = true;
return base.OnHover(state);
}
protected override void OnHoverLost(InputState state)
{
Nub.Glowing = false;
base.OnHoverLost(state);
}
protected override void OnUserChange()
{
base.OnUserChange();
playSample();
}
private void playSample()
{
if (Clock == null || Clock.CurrentTime - lastSampleTime <= 50)
return;
if (Current.Value.Equals(lastSampleValue))
return;
lastSampleValue = Current.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();
}
protected override bool OnMouseDown(InputState state, MouseDownEventArgs args)
{
Nub.Current.Value = true;
return base.OnMouseDown(state, args);
}
protected override bool OnMouseUp(InputState state, MouseUpEventArgs args)
{
Nub.Current.Value = false;
return base.OnMouseUp(state, args);
}
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;
}
}
}