Add settings section from TimingPointGroups on timing screen

osu.Game/Screens/Edit/Timing/ControlPointSettings.cs

@@ -41,6 +41,7 @@ namespace osu.Game.Screens.Edit.Timing
 
         private IReadOnlyList<Drawable> createSections() => new Drawable[]
         {
+            new GroupSection(),
             new TimingSection(),
             new DifficultySection(),
             new SampleSection(),

osu.Game/Screens/Edit/Timing/GroupSection.cs

@@ -0,0 +1,96 @@
+// 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.Linq;
+using osu.Framework.Allocation;
+using osu.Framework.Bindables;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Game.Beatmaps;
+using osu.Game.Beatmaps.ControlPoints;
+using osu.Game.Graphics.UserInterface;
+using osu.Game.Graphics.UserInterfaceV2;
+using osuTK;
+
+namespace osu.Game.Screens.Edit.Timing
+{
+    internal class GroupSection : CompositeDrawable
+    {
+        private LabelledTextBox textBox;
+
+        [Resolved]
+        protected Bindable<ControlPointGroup> SelectedGroup { get; private set; }
+
+        [Resolved]
+        protected IBindable<WorkingBeatmap> Beatmap { get; private set; }
+
+        [Resolved]
+        private EditorClock clock { get; set; }
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            RelativeSizeAxes = Axes.X;
+            AutoSizeAxes = Axes.Y;
+
+            Padding = new MarginPadding(10);
+
+            InternalChildren = new Drawable[]
+            {
+                new FillFlowContainer
+                {
+                    RelativeSizeAxes = Axes.X,
+                    AutoSizeAxes = Axes.Y,
+                    Spacing = new Vector2(10),
+                    Direction = FillDirection.Vertical,
+                    Children = new Drawable[]
+                    {
+                        textBox = new LabelledTextBox
+                        {
+                            Label = "Time"
+                        },
+                        new TriangleButton
+                        {
+                            Text = "Use current time",
+                            RelativeSizeAxes = Axes.X,
+                            Action = () => changeSelectedGroupTime(clock.CurrentTime)
+                        }
+                    }
+                },
+            };
+
+            textBox.OnCommit += (sender, isNew) =>
+            {
+                if (double.TryParse(sender.Text, out var newTime))
+                {
+                    changeSelectedGroupTime(newTime);
+                }
+            };
+
+            SelectedGroup.BindValueChanged(group =>
+            {
+                if (group.NewValue == null)
+                {
+                    textBox.Text = string.Empty;
+                    textBox.Current.Disabled = true;
+                    return;
+                }
+
+                textBox.Current.Disabled = false;
+                textBox.Text = $"{group.NewValue.Time:n0}";
+            }, true);
+        }
+
+        private void changeSelectedGroupTime(in double time)
+        {
+            var currentGroupItems = SelectedGroup.Value.ControlPoints.ToArray();
+
+            Beatmap.Value.Beatmap.ControlPointInfo.RemoveGroup(SelectedGroup.Value);
+
+            foreach (var cp in currentGroupItems)
+                Beatmap.Value.Beatmap.ControlPointInfo.Add(time, cp);
+
+            SelectedGroup.Value = Beatmap.Value.Beatmap.ControlPointInfo.GroupAt(time);
+        }
+    }
+}