Add option in resize handels to make it staty in the bounds of the parent element

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Drawing/Manipulators/ResizeBorderFrame.cs

 
 public class ResizeBorderFrame : VisualElement
 {
+    List<ResizeSideHandle> m_ResizeSideHandles;
+
+    bool m_StayWithinParentBounds;
+
+    public bool stayWithinParentBounds
+    {
+        get { return m_StayWithinParentBounds; }
+        set
+        {
+            m_StayWithinParentBounds = value;
+
+            foreach (ResizeSideHandle resizeHandle in m_ResizeSideHandles)
+            {
+                resizeHandle.stayWithinPanretBounds = value;
+            }
+        }
+    }
+
     public Action OnResizeFinished;
 
     public ResizeBorderFrame(VisualElement target)
         AddToClassList("reszieBorderFrame");
 
-        ResizeSideHandle topLeft =  new ResizeSideHandle(target, ResizeHandleAnchor.TopLeft);
-        ResizeSideHandle top =  new ResizeSideHandle(target, ResizeHandleAnchor.Top);
-        ResizeSideHandle topRight =  new ResizeSideHandle(target, ResizeHandleAnchor.TopRight);
-        ResizeSideHandle right = new ResizeSideHandle(target, ResizeHandleAnchor.Right);
-        ResizeSideHandle bottomRight = new ResizeSideHandle(target, ResizeHandleAnchor.BottomRight);
-        ResizeSideHandle bottom = new ResizeSideHandle(target, ResizeHandleAnchor.Bottom);
-        ResizeSideHandle bottomLeft = new ResizeSideHandle(target, ResizeHandleAnchor.BottomLeft);
-        ResizeSideHandle left = new ResizeSideHandle(target, ResizeHandleAnchor.Left);
+        m_ResizeSideHandles = new List<ResizeSideHandle>();
-        topLeft.OnResizeFinished += HandleResizefinished;
-        top.OnResizeFinished += HandleResizefinished;
-        topRight.OnResizeFinished += HandleResizefinished;
-        right.OnResizeFinished += HandleResizefinished;
-        bottomRight.OnResizeFinished += HandleResizefinished;
-        bottom.OnResizeFinished += HandleResizefinished;
-        bottomLeft.OnResizeFinished += HandleResizefinished;
-        left.OnResizeFinished += HandleResizefinished;
+        m_ResizeSideHandles.Add(new ResizeSideHandle(target, ResizeHandleAnchor.TopLeft));
+        m_ResizeSideHandles.Add(new ResizeSideHandle(target, ResizeHandleAnchor.Top));
+        m_ResizeSideHandles.Add(new ResizeSideHandle(target, ResizeHandleAnchor.TopRight));
+        m_ResizeSideHandles.Add(new ResizeSideHandle(target, ResizeHandleAnchor.Right));
+        m_ResizeSideHandles.Add(new ResizeSideHandle(target, ResizeHandleAnchor.BottomRight));
+        m_ResizeSideHandles.Add(new ResizeSideHandle(target, ResizeHandleAnchor.Bottom));
+        m_ResizeSideHandles.Add(new ResizeSideHandle(target, ResizeHandleAnchor.BottomLeft));
+        m_ResizeSideHandles.Add(new ResizeSideHandle(target, ResizeHandleAnchor.Left));
-        Add(topLeft);
-        Add(top);
-        Add(topRight);
-        Add(right);
-        Add(bottomRight);
-        Add(bottom);
-        Add(bottomLeft);
-        Add(left);
+        foreach (ResizeSideHandle resizeHandle in m_ResizeSideHandles)
+        {
+            resizeHandle.OnResizeFinished += HandleResizefinished;
+            Add(resizeHandle);
+        }
     }
 
     void HandleResizefinished()

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Drawing/Manipulators/ResizeSideHandle.cs

     {
         VisualElement m_ResizeTarget;
 
+        bool m_StayWithinParentBounds;
+
+        public bool stayWithinPanretBounds
+        {
+            get { return m_StayWithinParentBounds; }
+            set { m_StayWithinParentBounds = value; }
+        }
+
         public Action OnResizeFinished;
 
         public ResizeSideHandle(VisualElement resizeTarget, ResizeHandleAnchor anchor)
 
             newLayout.x = Mathf.Min(newLayout.x + normalizedResizeDelta.x, previousFarX - minSize.x);
             newLayout.y = Mathf.Min(newLayout.y + normalizedResizeDelta.y, previousFarY - minSize.y);
+
+            if (m_StayWithinParentBounds)
+            {
+                if (newLayout.x < 0f || (newLayout.x + newLayout.width) > m_ResizeTarget.parent.layout.width)
+                {
+                    newLayout.width = m_ResizeTarget.layout.width;
+                }
+
+                if (newLayout.y < 0f || (newLayout.y + newLayout.height) > m_ResizeTarget.parent.layout.height)
+                {
+                    newLayout.height = m_ResizeTarget.layout.height;
+                }
+            }
 
             m_ResizeTarget.layout = newLayout;
         }

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Drawing/Views/GraphEditorView.cs

                 m_GraphView.Add(m_MasterPreviewView);
 
                 ResizeBorderFrame masterPreviewResizeBorderFrame = new ResizeBorderFrame(m_MasterPreviewView) { name = "resizeBorderFrame" };
+                masterPreviewResizeBorderFrame.stayWithinParentBounds = true;
                 masterPreviewResizeBorderFrame.OnResizeFinished += UpdateSerializedWindowLayout;
                 m_MasterPreviewView.Add(masterPreviewResizeBorderFrame);