2018-04-13 09:19:50 +00:00
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// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
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// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
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using System;
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using System.Globalization;
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using OpenTK;
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using OpenTK.Graphics;
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using osu.Framework.Allocation;
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using osu.Framework.Audio;
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using osu.Framework.Audio.Sample;
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using osu.Framework.Configuration;
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using osu.Framework.Graphics;
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using osu.Framework.Graphics.UserInterface;
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using osu.Framework.Input;
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using osu.Framework.Graphics.Cursor;
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using osu.Framework.Graphics.Shapes;
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namespace osu.Game.Graphics.UserInterface
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{
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public class OsuSliderBar<T> : SliderBar<T>, IHasTooltip, IHasAccentColour
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where T : struct, IEquatable<T>, IComparable, IConvertible
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{
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/// <summary>
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/// Maximum number of decimal digits to be displayed in the tooltip.
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/// </summary>
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private const int max_decimal_digits = 5;
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private SampleChannel sample;
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private double lastSampleTime;
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private T lastSampleValue;
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protected readonly Nub Nub;
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private readonly Box leftBox;
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private readonly Box rightBox;
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public virtual string TooltipText
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{
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get
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{
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var bindableDouble = CurrentNumber as BindableNumber<double>;
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var bindableFloat = CurrentNumber as BindableNumber<float>;
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var floatValue = bindableDouble?.Value ?? bindableFloat?.Value;
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var floatPrecision = bindableDouble?.Precision ?? bindableFloat?.Precision;
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if (floatValue != null)
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{
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var floatMinValue = bindableDouble?.MinValue ?? bindableFloat.MinValue;
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var floatMaxValue = bindableDouble?.MaxValue ?? bindableFloat.MaxValue;
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if (floatMaxValue == 1 && (floatMinValue == 0 || floatMinValue == -1))
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return floatValue.Value.ToString("P0");
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var decimalPrecision = normalise((decimal)floatPrecision, max_decimal_digits);
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// Find the number of significant digits (we could have less than 5 after normalize())
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var significantDigits = findPrecision(decimalPrecision);
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return floatValue.Value.ToString($"N{significantDigits}");
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}
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var bindableInt = CurrentNumber as BindableNumber<int>;
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if (bindableInt != null)
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return bindableInt.Value.ToString("N0");
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return Current.Value.ToString(CultureInfo.InvariantCulture);
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}
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}
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private Color4 accentColour;
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public Color4 AccentColour
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{
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get { return accentColour; }
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set
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{
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accentColour = value;
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leftBox.Colour = value;
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rightBox.Colour = value;
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}
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}
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public OsuSliderBar()
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{
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Height = 12;
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RangePadding = 20;
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Children = new Drawable[]
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{
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leftBox = new Box
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{
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Height = 2,
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EdgeSmoothness = new Vector2(0, 0.5f),
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Position = new Vector2(2, 0),
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RelativeSizeAxes = Axes.None,
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Anchor = Anchor.CentreLeft,
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Origin = Anchor.CentreLeft,
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},
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rightBox = new Box
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{
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Height = 2,
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EdgeSmoothness = new Vector2(0, 0.5f),
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Position = new Vector2(-2, 0),
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RelativeSizeAxes = Axes.None,
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Anchor = Anchor.CentreRight,
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Origin = Anchor.CentreRight,
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Alpha = 0.5f,
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},
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Nub = new Nub
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{
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Origin = Anchor.TopCentre,
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Expanded = true,
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},
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new HoverClickSounds()
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};
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Current.DisabledChanged += disabled =>
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{
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Alpha = disabled ? 0.3f : 1;
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};
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}
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[BackgroundDependencyLoader]
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private void load(AudioManager audio, OsuColour colours)
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{
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sample = audio.Sample.Get(@"UI/sliderbar-notch");
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AccentColour = colours.Pink;
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}
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protected override bool OnHover(InputState state)
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{
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Nub.Glowing = true;
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return base.OnHover(state);
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}
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protected override void OnHoverLost(InputState state)
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{
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Nub.Glowing = false;
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base.OnHoverLost(state);
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}
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protected override void OnUserChange()
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{
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base.OnUserChange();
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playSample();
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}
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private void playSample()
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{
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if (Clock == null || Clock.CurrentTime - lastSampleTime <= 50)
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return;
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if (Current.Value.Equals(lastSampleValue))
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return;
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lastSampleValue = Current.Value;
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lastSampleTime = Clock.CurrentTime;
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sample.Frequency.Value = 1 + NormalizedValue * 0.2f;
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if (NormalizedValue == 0)
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sample.Frequency.Value -= 0.4f;
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else if (NormalizedValue == 1)
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sample.Frequency.Value += 0.4f;
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sample.Play();
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}
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protected override bool OnMouseDown(InputState state, MouseDownEventArgs args)
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{
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Nub.Current.Value = true;
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return base.OnMouseDown(state, args);
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}
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protected override bool OnMouseUp(InputState state, MouseUpEventArgs args)
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{
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Nub.Current.Value = false;
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return base.OnMouseUp(state, args);
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}
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protected override void UpdateAfterChildren()
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{
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base.UpdateAfterChildren();
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leftBox.Scale = new Vector2(MathHelper.Clamp(
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Nub.DrawPosition.X - Nub.DrawWidth / 2, 0, DrawWidth), 1);
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rightBox.Scale = new Vector2(MathHelper.Clamp(
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DrawWidth - Nub.DrawPosition.X - Nub.DrawWidth / 2, 0, DrawWidth), 1);
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}
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protected override void UpdateValue(float value)
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{
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Nub.MoveToX(RangePadding + UsableWidth * value, 250, Easing.OutQuint);
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}
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/// <summary>
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/// Removes all non-significant digits, keeping at most a requested number of decimal digits.
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/// </summary>
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/// <param name="d">The decimal to normalize.</param>
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/// <param name="sd">The maximum number of decimal digits to keep. The final result may have fewer decimal digits than this value.</param>
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/// <returns>The normalised decimal.</returns>
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private decimal normalise(decimal d, int sd)
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=> decimal.Parse(Math.Round(d, sd).ToString(string.Concat("0.", new string('#', sd)), CultureInfo.InvariantCulture), CultureInfo.InvariantCulture);
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/// <summary>
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/// Finds the number of digits after the decimal.
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/// </summary>
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/// <param name="d">The value to find the number of decimal digits for.</param>
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/// <returns>The number decimal digits.</returns>
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private int findPrecision(decimal d)
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{
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int precision = 0;
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while (d != Math.Round(d))
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{
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d *= 10;
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precision++;
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}
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return precision;
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}
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}
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}
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