Steps of layout method

templates/ui/basesizer/layout.md

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+# Layout
+
+Resize and place children.
+
+## Steps
+
+1. Set scaleX, scaleY to `1` of this game object
+    1. Store current scaleX, scaleY
+    1. Set scaleX, scaleY to `1`
+1. Layout this game object
+    1. Skip layout if this game object is
+        - Hidden
+        - Not dirty
+    1. From isTopmostParent, Prelayout : 
+        - Clear `_childrenWidth`, `_childrenHeight` properties of all children.
+        - Custom logic of Prelayout
+    1. Calculate width of this game object
+        - Max value of total children width, or `minWidth` of this game object
+    1. From isTopmostParent, calculate width of all children
+    1. From isTopmostParent, run width-wrap of this game object and all children
+    1. Calculate height of this game object
+    1. Custom logic of change size of children
+    1. Resize this game object according to step 2.3 and step 2.6
+    1. Layout children, start from step 2
+        - Custom logic of `layoutChildren`
+    1. Layout background
+    1. Default PostLayout :
+        - Anchor position
+    1. Custom logic of PostLayout
+1. Restore scaleX, scaleY of this game object