Create TestSceneCircularPositionSnapGrid.cs

osu.Game.Tests/Visual/Editing/TestSceneCircularPositionSnapGrid.cs

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+// 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.
+
+#nullable disable
+
+using System;
+using NUnit.Framework;
+using osu.Framework.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Shapes;
+using osu.Framework.Input.Events;
+using osu.Game.Screens.Edit.Compose.Components;
+using osuTK;
+using osuTK.Graphics;
+
+namespace osu.Game.Tests.Visual.Editing
+{
+    public partial class TestSceneCircularPositionSnapGrid : OsuManualInputManagerTestScene
+    {
+        private Container content;
+        protected override Container<Drawable> Content => content;
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            base.Content.AddRange(new Drawable[]
+            {
+                new Box
+                {
+                    RelativeSizeAxes = Axes.Both,
+                    Colour = Colour4.Gray
+                },
+                content = new Container
+                {
+                    RelativeSizeAxes = Axes.Both,
+                    Padding = new MarginPadding(10),
+                }
+            });
+        }
+
+        private static readonly object[][] test_cases =
+        {
+            new object[] { new Vector2(0, 0), 10, 0f },
+            new object[] { new Vector2(240, 180), 10, 10f },
+            new object[] { new Vector2(160, 120), 30, -10f },
+            new object[] { new Vector2(480, 360), 100, 0f },
+        };
+
+        [TestCaseSource(nameof(test_cases))]
+        public void TestCircularGrid(Vector2 position, float spacing, float rotation)
+        {
+            CircularPositionSnapGrid grid = null;
+
+            AddStep("create grid", () =>
+            {
+                Child = grid = new CircularPositionSnapGrid
+                {
+                    RelativeSizeAxes = Axes.Both,
+                };
+                grid.StartPosition.Value = position;
+                grid.Spacing.Value = spacing;
+            });
+
+            AddStep("add snapping cursor", () => Add(new SnappingCursorContainer
+            {
+                RelativeSizeAxes = Axes.Both,
+                GetSnapPosition = pos => grid.GetSnappedPosition(grid.ToLocalSpace(pos))
+            }));
+        }
+
+        private partial class SnappingCursorContainer : CompositeDrawable
+        {
+            public Func<Vector2, Vector2> GetSnapPosition;
+
+            private readonly Drawable cursor;
+
+            public SnappingCursorContainer()
+            {
+                RelativeSizeAxes = Axes.Both;
+
+                InternalChild = cursor = new Circle
+                {
+                    Origin = Anchor.Centre,
+                    Size = new Vector2(50),
+                    Colour = Color4.Red
+                };
+            }
+
+            protected override void LoadComplete()
+            {
+                base.LoadComplete();
+
+                updatePosition(GetContainingInputManager().CurrentState.Mouse.Position);
+            }
+
+            protected override bool OnMouseMove(MouseMoveEvent e)
+            {
+                base.OnMouseMove(e);
+
+                updatePosition(e.ScreenSpaceMousePosition);
+                return true;
+            }
+
+            private void updatePosition(Vector2 screenSpacePosition)
+            {
+                cursor.Position = GetSnapPosition.Invoke(screenSpacePosition);
+            }
+        }
+    }
+}