Initial commit

Library/PackageCache/com.unity.2d.animation@3.2.6/Editor/LayoutOverlay/Manipulators/Draggable.cs

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+using UnityEngine;
+using UnityEngine.UIElements;
+
+namespace UnityEditor.U2D.Layout
+{
+    internal interface IDraggable
+    {
+        bool IsMovableNow();
+        void UpdatePresenterPosition();
+    }
+
+    internal class Draggable : MouseManipulator
+    {
+        private Vector2 m_Start;
+        protected bool m_Active;
+
+        public Vector2 panSpeed { get; set; }
+        public bool clampToParentEdges { get; set; }
+
+        public Draggable(bool clampToParentEdges = false)
+        {
+            activators.Add(new ManipulatorActivationFilter {button = MouseButton.LeftMouse});
+            panSpeed = Vector2.one;
+            this.clampToParentEdges = clampToParentEdges;
+            m_Active = false;
+        }
+
+        protected Rect CalculatePosition(float x, float y, float width, float height)
+        {
+            var rect = new Rect(x, y, width, height);
+
+            if (clampToParentEdges)
+            {
+                if (rect.x < 0f)
+                    rect.x = 0f;
+                else if (rect.xMax > target.parent.layout.width)
+                    rect.x = target.parent.layout.width - rect.width;
+
+                if (rect.y < 0f)
+                    rect.y = 0f;
+                else if (rect.yMax > target.parent.layout.height)
+                    rect.y = target.parent.layout.height - rect.height;
+
+                // Reset size, we never intended to change them in the first place
+                rect.width = width;
+                rect.height = height;
+            }
+
+            return rect;
+        }
+
+        protected override void RegisterCallbacksOnTarget()
+        {
+            target.RegisterCallback<MouseDownEvent>(OnMouseDown);
+            target.RegisterCallback<MouseMoveEvent>(OnMouseMove);
+            target.RegisterCallback<MouseUpEvent>(OnMouseUp);
+        }
+
+        protected override void UnregisterCallbacksFromTarget()
+        {
+            target.UnregisterCallback<MouseDownEvent>(OnMouseDown);
+            target.UnregisterCallback<MouseMoveEvent>(OnMouseMove);
+            target.UnregisterCallback<MouseUpEvent>(OnMouseUp);
+        }
+
+        protected void OnMouseDown(MouseDownEvent e)
+        {
+            if (m_Active)
+            {
+                e.StopImmediatePropagation();
+                return;
+            }
+
+            /*
+            IDraggable ce = e.target as IDraggable;
+            if (ce == null || !ce.IsMovableNow())
+            {
+                return;
+            }
+            */
+
+            if (CanStartManipulation(e))
+            {
+                m_Start = e.localMousePosition;
+
+                m_Active = true;
+                target.CaptureMouse();
+                e.StopPropagation();
+            }
+        }
+
+        protected void OnMouseMove(MouseMoveEvent e)
+        {
+            /*
+            IDraggable ce = e.target as IDraggable;
+            if (ce == null || !ce.IsMovableNow())
+            {
+                return;
+            }
+            */
+
+            if (m_Active)
+            {
+                Vector2 diff = e.localMousePosition - m_Start;
+                Rect rect = CalculatePosition(target.layout.x + diff.x, target.layout.y + diff.y, target.layout.width, target.layout.height);
+
+                if (target.style.position == Position.Relative)
+                {
+                    target.style.left = rect.xMin;
+                    target.style.top = rect.yMin;
+                    target.style.right = rect.xMax;
+                    target.style.bottom = rect.yMax;
+                }
+                else if (target.style.position == Position.Absolute)
+                {
+                    target.style.left = rect.x;
+                    target.style.top = rect.y;
+                }
+
+                e.StopPropagation();
+            }
+        }
+
+        protected void OnMouseUp(MouseUpEvent e)
+        {
+            /*
+            IDraggable ce = e.target as IDraggable;
+            if (ce == null || !ce.IsMovableNow())
+            {
+                return;
+            }
+            */
+
+            if (m_Active)
+            {
+                if (CanStopManipulation(e))
+                {
+                    //ce.UpdatePresenterPosition();
+                    m_Active = false;
+                    target.ReleaseMouse();
+                    e.StopPropagation();
+                }
+            }
+        }
+    }
+}

Library/PackageCache/com.unity.2d.animation@3.2.6/Editor/LayoutOverlay/Manipulators/Draggable.cs.meta

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