Merge pull request #10391 from peppy/editor-setup-screen-difficulty-adjust

Add difficulty adjustment settings to editor setup screen

osu.Game/Screens/Edit/EditorBeatmap.cs

@@ -315,5 +315,14 @@ namespace osu.Game.Screens.Edit
         public double GetBeatLengthAtTime(double referenceTime) => ControlPointInfo.TimingPointAt(referenceTime).BeatLength / BeatDivisor;
 
         public int BeatDivisor => beatDivisor?.Value ?? 1;
+
+        /// <summary>
+        /// Update all hit objects with potentially changed difficulty or control point data.
+        /// </summary>
+        public void UpdateBeatmap()
+        {
+            foreach (var h in HitObjects)
+                pendingUpdates.Add(h);
+        }
     }
 }

osu.Game/Screens/Edit/Setup/DifficultySection.cs

@@ -0,0 +1,99 @@
+// 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.Game.Beatmaps;
+using osu.Game.Graphics.Sprites;
+using osu.Game.Graphics.UserInterfaceV2;
+
+namespace osu.Game.Screens.Edit.Setup
+{
+    internal class DifficultySection : SetupSection
+    {
+        [Resolved]
+        private EditorBeatmap editorBeatmap { get; set; }
+
+        private LabelledSliderBar<float> circleSizeSlider;
+        private LabelledSliderBar<float> healthDrainSlider;
+        private LabelledSliderBar<float> approachRateSlider;
+        private LabelledSliderBar<float> overallDifficultySlider;
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            Children = new Drawable[]
+            {
+                new OsuSpriteText
+                {
+                    Text = "Difficulty settings"
+                },
+                circleSizeSlider = new LabelledSliderBar<float>
+                {
+                    Label = "Object Size",
+                    Description = "The size of all hit objects",
+                    Current = new BindableFloat(Beatmap.Value.BeatmapInfo.BaseDifficulty.CircleSize)
+                    {
+                        Default = BeatmapDifficulty.DEFAULT_DIFFICULTY,
+                        MinValue = 2,
+                        MaxValue = 7,
+                        Precision = 0.1f,
+                    }
+                },
+                healthDrainSlider = new LabelledSliderBar<float>
+                {
+                    Label = "Health Drain",
+                    Description = "The rate of passive health drain throughout playable time",
+                    Current = new BindableFloat(Beatmap.Value.BeatmapInfo.BaseDifficulty.DrainRate)
+                    {
+                        Default = BeatmapDifficulty.DEFAULT_DIFFICULTY,
+                        MinValue = 0,
+                        MaxValue = 10,
+                        Precision = 0.1f,
+                    }
+                },
+                approachRateSlider = new LabelledSliderBar<float>
+                {
+                    Label = "Approach Rate",
+                    Description = "The speed at which objects are presented to the player",
+                    Current = new BindableFloat(Beatmap.Value.BeatmapInfo.BaseDifficulty.ApproachRate)
+                    {
+                        Default = BeatmapDifficulty.DEFAULT_DIFFICULTY,
+                        MinValue = 0,
+                        MaxValue = 10,
+                        Precision = 0.1f,
+                    }
+                },
+                overallDifficultySlider = new LabelledSliderBar<float>
+                {
+                    Label = "Overall Difficulty",
+                    Description = "The harshness of hit windows and difficulty of special objects (ie. spinners)",
+                    Current = new BindableFloat(Beatmap.Value.BeatmapInfo.BaseDifficulty.OverallDifficulty)
+                    {
+                        Default = BeatmapDifficulty.DEFAULT_DIFFICULTY,
+                        MinValue = 0,
+                        MaxValue = 10,
+                        Precision = 0.1f,
+                    }
+                },
+            };
+
+            foreach (var item in Children.OfType<LabelledSliderBar<float>>())
+                item.Current.ValueChanged += onValueChanged;
+        }
+
+        private void onValueChanged(ValueChangedEvent<float> args)
+        {
+            // for now, update these on commit rather than making BeatmapMetadata bindables.
+            // after switching database engines we can reconsider if switching to bindables is a good direction.
+            Beatmap.Value.BeatmapInfo.BaseDifficulty.CircleSize = circleSizeSlider.Current.Value;
+            Beatmap.Value.BeatmapInfo.BaseDifficulty.DrainRate = healthDrainSlider.Current.Value;
+            Beatmap.Value.BeatmapInfo.BaseDifficulty.ApproachRate = approachRateSlider.Current.Value;
+            Beatmap.Value.BeatmapInfo.BaseDifficulty.OverallDifficulty = overallDifficultySlider.Current.Value;
+
+            editorBeatmap.UpdateBeatmap();
+        }
+    }
+}

osu.Game/Screens/Edit/Setup/SetupScreen.cs

@@ -52,6 +52,7 @@ namespace osu.Game.Screens.Edit.Setup
                             {
                                 new ResourcesSection(),
                                 new MetadataSection(),
+                                new DifficultySection(),
                             }
                         },
                     }