osu/osu.Game/Graphics/UserInterface/BarGraph.cs

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// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
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// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
using OpenTK;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
using System.Collections.Generic;
using System.Linq;
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namespace osu.Game.Graphics.UserInterface
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{
public class BarGraph : FillFlowContainer<Bar>
{
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/// <summary>
/// Manually sets the max value, if null <see cref="Enumerable.Max(IEnumerable{float})"/> is instead used
/// </summary>
public float? MaxValue { get; set; }
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private BarDirection direction = BarDirection.BottomToTop;
public new BarDirection Direction
{
get
{
return direction;
}
set
{
direction = value;
base.Direction = (direction & BarDirection.Horizontal) > 0 ? FillDirection.Vertical : FillDirection.Horizontal;
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foreach (var bar in Children)
{
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bar.Size = (direction & BarDirection.Horizontal) > 0 ? new Vector2(1, 1.0f / Children.Count) : new Vector2(1.0f / Children.Count, 1);
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bar.Direction = direction;
}
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}
}
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/// <summary>
/// A list of floats that defines the length of each <see cref="Bar"/>
/// </summary>
public IEnumerable<float> Values
{
set
{
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List<Bar> bars = Children.ToList();
foreach (var bar in value.Select((length, index) => new { Value = length, Bar = bars.Count > index ? bars[index] : null }))
{
float length = MaxValue ?? value.Max();
if (length != 0)
length = bar.Value / length;
float size = value.Count();
if (size != 0)
size = 1.0f / size;
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if (bar.Bar != null)
{
bar.Bar.Length = length;
bar.Bar.Size = (direction & BarDirection.Horizontal) > 0 ? new Vector2(1, size) : new Vector2(size, 1);
}
else
{
Add(new Bar
{
RelativeSizeAxes = Axes.Both,
Size = (direction & BarDirection.Horizontal) > 0 ? new Vector2(1, size) : new Vector2(size, 1),
Length = length,
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Direction = Direction,
});
}
}
//I'm using ToList() here because Where() returns an Enumerable which can change it's elements afterwards
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RemoveRange(Children.Where((bar, index) => index >= value.Count()).ToList());
}
}
}
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}