Implement horizontal ticks creation

osu.Game/Overlays/Profile/Sections/Historical/ProfileLineChart.cs

@@ -5,6 +5,13 @@ using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics;
 using JetBrains.Annotations;
 using static osu.Game.Users.User;
+using System;
+using System.Linq;
+using osu.Game.Graphics.Sprites;
+using osu.Framework.Utils;
+using osu.Framework.Allocation;
+using osu.Game.Graphics;
+using osu.Framework.Graphics.Shapes;
 
 namespace osu.Game.Overlays.Profile.Sections.Historical
 {
@@ -20,10 +27,14 @@ namespace osu.Game.Overlays.Profile.Sections.Historical
             {
                 values = value;
                 graph.Values = values;
+
+                createRowTicks();
             }
         }
 
         private readonly UserHistoryGraph graph;
+        private readonly Container<TickText> rowTicksContainer;
+        private readonly Container<TickLine> rowLinesContainer;
 
         public ProfileLineChart()
         {
@@ -46,10 +57,25 @@ namespace osu.Game.Overlays.Profile.Sections.Historical
                 {
                     new Drawable[]
                     {
-                        Empty(),
+                        rowTicksContainer = new Container<TickText>
-                        graph = new UserHistoryGraph
                         {
-                            RelativeSizeAxes = Axes.Both
+                            RelativeSizeAxes = Axes.Y,
+                            AutoSizeAxes = Axes.X
+                        },
+                        new Container
+                        {
+                            RelativeSizeAxes = Axes.Both,
+                            Children = new Drawable[]
+                            {
+                                rowLinesContainer = new Container<TickLine>
+                                {
+                                    RelativeSizeAxes = Axes.Both
+                                },
+                                graph = new UserHistoryGraph
+                                {
+                                    RelativeSizeAxes = Axes.Both
+                                }
+                            }
                         }
                     },
                     new Drawable[]
@@ -60,5 +86,99 @@ namespace osu.Game.Overlays.Profile.Sections.Historical
                 }
             };
         }
+
+        private void createRowTicks()
+        {
+            rowTicksContainer.Clear();
+            rowLinesContainer.Clear();
+
+            var min = values.Select(v => v.Count).Min();
+            var max = values.Select(v => v.Count).Max();
+
+            var niceRange = niceNumber(max - min, false);
+            var niceTick = niceNumber(niceRange / (6 - 1), true);
+            var axisStart = Math.Floor(min / niceTick) * niceTick;
+            var axisEnd = Math.Ceiling(max / niceTick) * niceTick;
+
+            var rollingRow = axisStart;
+
+            while (rollingRow <= axisEnd)
+            {
+                var y = -Interpolation.ValueAt(rollingRow, 0, 1f, min, max);
+
+                rowTicksContainer.Add(new TickText
+                {
+                    Anchor = Anchor.BottomRight,
+                    Origin = Anchor.CentreRight,
+                    RelativePositionAxes = Axes.Y,
+                    Text = rollingRow.ToString("N0"),
+                    Y = y
+                });
+
+                rowLinesContainer.Add(new TickLine
+                {
+                    Anchor = Anchor.BottomRight,
+                    Origin = Anchor.CentreRight,
+                    RelativeSizeAxes = Axes.X,
+                    RelativePositionAxes = Axes.Y,
+                    Height = 1,
+                    Y = y
+                });
+
+                rollingRow += niceTick;
+            }
+        }
+
+        private double niceNumber(double value, bool round)
+        {
+            var exponent = (int)Math.Floor(Math.Log10(value));
+            var fraction = value / Math.Pow(10, exponent);
+
+            double niceFraction;
+
+            if (round)
+            {
+                if (fraction < 1.5)
+                    niceFraction = 1.0;
+                else if (fraction < 3)
+                    niceFraction = 2.0;
+                else if (fraction < 7)
+                    niceFraction = 5.0;
+                else
+                    niceFraction = 10.0;
+            }
+            else
+            {
+                if (fraction <= 1.0)
+                    niceFraction = 1.0;
+                else if (fraction <= 2.0)
+                    niceFraction = 2.0;
+                else if (fraction <= 5.0)
+                    niceFraction = 5.0;
+                else
+                    niceFraction = 10.0;
+            }
+
+            return niceFraction * Math.Pow(10, exponent);
+        }
+
+        private class TickText : OsuSpriteText
+        {
+            [BackgroundDependencyLoader]
+            private void load(OverlayColourProvider colourProvider)
+            {
+                Colour = colourProvider.Foreground1;
+                Font = OsuFont.GetFont(size: 12);
+            }
+        }
+
+        private class TickLine : Box
+        {
+            [BackgroundDependencyLoader]
+            private void load(OverlayColourProvider colourProvider)
+            {
+                Colour = colourProvider.Background6;
+            }
+        }
     }
 }