Animate addition/removal of views in expanded mode.
This required adding the setChildVisibility method to controllers, to allow them to animate in/out views that pass the max rendered child threshold. This was not previously relevant since in the bubble stack, you can't really see the views when they're set to VISIBLE/GONE.
Also, renamed onChildToBeRemoved to onChildRemoved since that's more accurate given the move to transient views.
Test: atest SystemUITests
Change-Id: I291ff8f6257ba54e0688c1062bbd673e0c7bdb5c
diff --git a/packages/SystemUI/docs/physics-animation-layout.md b/packages/SystemUI/docs/physics-animation-layout.md
index a67b5e8..300f63a 100644
--- a/packages/SystemUI/docs/physics-animation-layout.md
+++ b/packages/SystemUI/docs/physics-animation-layout.md
@@ -26,7 +26,7 @@
### Animation Control Methods
-Once the layout has used the controller’s configuration properties to build the animations, the controller can use them to actually run animations. This is done for two reasons - reacting to a view being added or removed, or responding to another class (such as a touch handler or broadcast receiver) requesting an animation. ```onChildAdded``` and ```onChildRemoved``` are called automatically by the layout, giving the controller the opportunity to animate the child in/out. Custom methods are called by anyone with access to the controller instance to do things like expand, collapse, or move the child views.
+Once the layout has used the controller’s configuration properties to build the animations, the controller can use them to actually run animations. This is done for two reasons - reacting to a view being added or removed, or responding to another class (such as a touch handler or broadcast receiver) requesting an animation. ```onChildAdded```, ```onChildRemoved```, and ```setChildVisibility``` are called automatically by the layout, giving the controller the opportunity to animate the child in/out/visible/gone. Custom methods are called by anyone with access to the controller instance to do things like expand, collapse, or move the child views.
In either case, the controller has access to the layout’s protected ```animateValueForChildAtIndex(ViewProperty property, int index, float value)``` method. This method is used to actually run an animation.