code cleanup, preparing for spring-loaded adding to screens

Change-Id: Ic52b8df2b4c4998272fbfe2b1b195c177cac9a23

src/com/android/launcher2/PagedView.java

@@ -16,8 +16,7 @@
 
 package com.android.launcher2;
 
-import java.util.ArrayList;
-import java.util.HashMap;
+import com.android.launcher.R;
 
 import android.content.Context;
 import android.content.res.TypedArray;
@@ -41,7 +40,8 @@ import android.view.animation.Animation.AnimationListener;
 import android.widget.Checkable;
 import android.widget.Scroller;
 
-import com.android.launcher.R;
+import java.util.ArrayList;
+import java.util.HashMap;
 
 /**
  * An abstraction of the original Workspace which supports browsing through a
@@ -433,6 +433,18 @@ public abstract class PagedView extends ViewGroup {
         setMeasuredDimension(widthSize, heightSize);
     }
 
+    protected void moveToNewPageWithoutMovingCellLayouts(int newCurrentPage) {
+        int newX = getChildOffset(newCurrentPage) - getRelativeChildOffset(newCurrentPage);
+        int delta = newX - mScrollX;
+
+        final int screenCount = getChildCount();
+        for (int i = 0; i < screenCount; i++) {
+            CellLayout cl = (CellLayout) getChildAt(i);
+            cl.setX(cl.getX() + delta);
+        }
+        setCurrentPage(newCurrentPage);
+    }
+
     @Override
     protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
         if (mFirstLayout && mCurrentPage >= 0 && mCurrentPage < getChildCount()) {