Transforming notifications now based on the user dragging

The animation is not a canned animation anymore but base on
the finger movement of the user.

Bug: 19437552
Change-Id: I0f81ac2ff05a92673e3f3b9b72a5c2de238890d0
diff --git a/packages/SystemUI/res/values/ids.xml b/packages/SystemUI/res/values/ids.xml
index 87aedab..9a8b41d 100644
--- a/packages/SystemUI/res/values/ids.xml
+++ b/packages/SystemUI/res/values/ids.xml
@@ -44,6 +44,10 @@
     <item type="id" name="notification_screenshot"/>
     <item type="id" name="notification_hidden"/>
     <item type="id" name="notification_volumeui"/>
+    <item type="id" name="transformation_start_x_tag"/>
+    <item type="id" name="transformation_start_y_tag"/>
+    <item type="id" name="transformation_start_scale_x_tag"/>
+    <item type="id" name="transformation_start_scale_y_tag"/>
 
     <!-- Whether the icon is from a notification for which targetSdk < L -->
     <item type="id" name="icon_is_pre_L"/>
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/CrossFadeHelper.java b/packages/SystemUI/src/com/android/systemui/statusbar/CrossFadeHelper.java
index 212d290..123dc69 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/CrossFadeHelper.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/CrossFadeHelper.java
@@ -19,6 +19,7 @@
 import android.view.View;
 
 import com.android.systemui.Interpolators;
+import com.android.systemui.statusbar.stack.StackStateAnimator;
 
 /**
  * A helper to fade views in and out.
@@ -44,7 +45,34 @@
         if (view.hasOverlappingRendering()) {
             view.animate().withLayer();
         }
+    }
 
+    public static void fadeOut(View view, float fadeOutAmount) {
+        view.animate().cancel();
+        if (fadeOutAmount == 1.0f) {
+            view.setVisibility(View.INVISIBLE);
+        } else if (view.getVisibility() == View.INVISIBLE) {
+            view.setVisibility(View.VISIBLE);
+        }
+        fadeOutAmount = mapToFadeDuration(fadeOutAmount);
+        float alpha = Interpolators.ALPHA_OUT.getInterpolation(1.0f - fadeOutAmount);
+        view.setAlpha(alpha);
+        updateLayerType(view, alpha);
+    }
+
+    private static float mapToFadeDuration(float fadeOutAmount) {
+        // Assuming a linear interpolator, we can easily map it to our new duration
+        float endPoint = (float) ANIMATION_DURATION_LENGTH
+                / (float) StackStateAnimator.ANIMATION_DURATION_STANDARD;
+        return Math.min(fadeOutAmount / endPoint, 1.0f);
+    }
+
+    private static void updateLayerType(View view, float alpha) {
+        if (view.hasOverlappingRendering() && alpha > 0.0f && alpha < 1.0f) {
+            view.setLayerType(View.LAYER_TYPE_HARDWARE, null);
+        } else if (view.getLayerType() == View.LAYER_TYPE_HARDWARE) {
+            view.setLayerType(View.LAYER_TYPE_NONE, null);
+        }
     }
 
     public static void fadeIn(final View view) {
@@ -62,4 +90,15 @@
             view.animate().withLayer();
         }
     }
+
+    public static void fadeIn(View view, float fadeInAmount) {
+        view.animate().cancel();
+        if (view.getVisibility() == View.INVISIBLE) {
+            view.setVisibility(View.VISIBLE);
+        }
+        fadeInAmount = mapToFadeDuration(fadeInAmount);
+        float alpha = Interpolators.ALPHA_IN.getInterpolation(fadeInAmount);
+        view.setAlpha(alpha);
+        updateLayerType(view, alpha);
+    }
 }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/ExpandableNotificationRow.java b/packages/SystemUI/src/com/android/systemui/statusbar/ExpandableNotificationRow.java
index c72cec3..36090a3 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/ExpandableNotificationRow.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/ExpandableNotificationRow.java
@@ -868,6 +868,7 @@
 
     public void setUserLocked(boolean userLocked) {
         mUserLocked = userLocked;
+        mPrivateLayout.setUserExpanding(userLocked);
     }
 
     /**
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/NotificationContentView.java b/packages/SystemUI/src/com/android/systemui/statusbar/NotificationContentView.java
index bc85922..fa2608a 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/NotificationContentView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/NotificationContentView.java
@@ -48,6 +48,7 @@
     private static final int VISIBLE_TYPE_EXPANDED = 1;
     private static final int VISIBLE_TYPE_HEADSUP = 2;
     private static final int VISIBLE_TYPE_SINGLELINE = 3;
+    private static final int UNDEFINED = -1;
 
     private final Rect mClipBounds = new Rect();
     private final int mMinContractedHeight;
@@ -102,6 +103,8 @@
     private boolean mExpandable;
     private boolean mClipToActualHeight = true;
     private ExpandableNotificationRow mContainingNotification;
+    private int mTransformationStartVisibleType;
+    private boolean mUserExpanding;
 
     public NotificationContentView(Context context, AttributeSet attrs) {
         super(context, attrs);
@@ -349,6 +352,41 @@
         invalidateOutline();
     }
 
+    private void updateContentTransformation() {
+        int visibleType = calculateVisibleType();
+        if (visibleType != mVisibleType) {
+            // A new transformation starts
+            mTransformationStartVisibleType = mVisibleType;
+            final TransformableView shownView = getTransformableViewForVisibleType(visibleType);
+            final TransformableView hiddenView = getTransformableViewForVisibleType(
+                    mTransformationStartVisibleType);
+            shownView.transformFrom(hiddenView, 0.0f);
+            getViewForVisibleType(visibleType).setVisibility(View.VISIBLE);
+            hiddenView.transformTo(shownView, 0.0f);
+            mVisibleType = visibleType;
+        }
+        if (mTransformationStartVisibleType != UNDEFINED
+                && mVisibleType != mTransformationStartVisibleType) {
+            final TransformableView shownView = getTransformableViewForVisibleType(mVisibleType);
+            final TransformableView hiddenView = getTransformableViewForVisibleType(
+                    mTransformationStartVisibleType);
+            float transformationAmount = calculateTransformationAmount();
+            shownView.transformFrom(hiddenView, transformationAmount);
+            hiddenView.transformTo(shownView, transformationAmount);
+        } else {
+            updateViewVisibilities(visibleType);
+        }
+    }
+
+    private float calculateTransformationAmount() {
+        int startHeight = getViewForVisibleType(mTransformationStartVisibleType).getHeight();
+        int endHeight = getViewForVisibleType(mVisibleType).getHeight();
+        int progress = Math.abs(mContentHeight - startHeight);
+        int totalDistance = Math.abs(endHeight - startHeight);
+        float amount = (float) progress / (float) totalDistance;
+        return Math.min(1.0f, amount);
+    }
+
     public int getContentHeight() {
         return mContentHeight;
     }
@@ -397,6 +435,10 @@
         if (mContractedChild == null) {
             return;
         }
+        if (mUserExpanding) {
+            updateContentTransformation();
+            return;
+        }
         int visibleType = calculateVisibleType();
         if (visibleType != mVisibleType || force) {
             if (animate && ((visibleType == VISIBLE_TYPE_EXPANDED && mExpandedChild != null)
@@ -492,9 +534,21 @@
      * @return one of the static enum types in this view, calculated form the current state
      */
     private int calculateVisibleType() {
-        boolean noExpandedChild = mExpandedChild == null;
-
+        if (mUserExpanding) {
+            int expandedVisualType = getVisualTypeForHeight(
+                    mContainingNotification.getMaxExpandHeight());
+            int collapsedVisualType = getVisualTypeForHeight(
+                    mContainingNotification.getMinExpandHeight());
+            return mTransformationStartVisibleType == collapsedVisualType
+                    ? expandedVisualType
+                    : collapsedVisualType;
+        }
         int viewHeight = Math.min(mContentHeight, mContainingNotification.getIntrinsicHeight());
+        return getVisualTypeForHeight(viewHeight);
+    }
+
+    private int getVisualTypeForHeight(float viewHeight) {
+        boolean noExpandedChild = mExpandedChild == null;
         if (!noExpandedChild && viewHeight == mExpandedChild.getHeight()) {
             return VISIBLE_TYPE_EXPANDED;
         }
@@ -723,4 +777,15 @@
             updateSingleLineView();
         }
     }
+
+    public void setUserExpanding(boolean userExpanding) {
+        mUserExpanding = userExpanding;
+        if (userExpanding) {
+            mTransformationStartVisibleType = mVisibleType;
+        } else {
+            mTransformationStartVisibleType = UNDEFINED;
+            mVisibleType = calculateVisibleType();
+            updateViewVisibilities(mVisibleType);
+        }
+    }
 }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/TransformableView.java b/packages/SystemUI/src/com/android/systemui/statusbar/TransformableView.java
index 38b6497..009eed7 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/TransformableView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/TransformableView.java
@@ -30,6 +30,7 @@
 
     /**
      * Get the current state of a view in a transform animation
+     *
      * @param fadingView which view we are interested in
      * @return the current transform state of this viewtype
      */
@@ -37,18 +38,37 @@
 
     /**
      * Transform to the given view
+     *
      * @param notification the view to transform to
      */
     void transformTo(TransformableView notification, Runnable endRunnable);
 
     /**
+     * Transform to the given view by a specified amount.
+     *
+     * @param notification the view to transform to
+     * @param transformationAmount how much transformation should be done
+     */
+    void transformTo(TransformableView notification, float transformationAmount);
+
+    /**
      * Transform to this view from the given view
+     *
      * @param notification the view to transform from
      */
     void transformFrom(TransformableView notification);
 
     /**
+     * Transform to this view from the given view by a specified amount.
+     *
+     * @param notification the view to transform from
+     * @param transformationAmount how much transformation should be done
+     */
+    void transformFrom(TransformableView notification, float transformationAmount);
+
+    /**
      * Set this view to be fully visible or gone
+     *
      * @param visible
      */
     void setVisible(boolean visible);
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/ViewTransformationHelper.java b/packages/SystemUI/src/com/android/systemui/statusbar/ViewTransformationHelper.java
index 63ff5aa..bf05d1d 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/ViewTransformationHelper.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/ViewTransformationHelper.java
@@ -16,13 +16,17 @@
 
 package com.android.systemui.statusbar;
 
-import android.os.Handler;
+import android.animation.Animator;
+import android.animation.AnimatorListenerAdapter;
+import android.animation.ValueAnimator;
 import android.util.ArrayMap;
 import android.view.View;
 import android.view.ViewGroup;
 
+import com.android.systemui.Interpolators;
 import com.android.systemui.R;
 import com.android.systemui.statusbar.notification.TransformState;
+import com.android.systemui.statusbar.stack.StackStateAnimator;
 
 import java.util.Stack;
 
@@ -33,9 +37,9 @@
 
     private static final int TAG_CONTAINS_TRANSFORMED_VIEW = R.id.contains_transformed_view;
 
-    private final Handler mHandler = new Handler();
     private ArrayMap<Integer, View> mTransformedViews = new ArrayMap<>();
     private ArrayMap<Integer, CustomTransformation> mCustomTransformations = new ArrayMap<>();
+    private ValueAnimator mViewTransformationAnimation;
 
     public void addTransformedView(int key, View transformedView) {
         mTransformedViews.put(key, transformedView);
@@ -59,61 +63,123 @@
     }
 
     @Override
-    public void transformTo(TransformableView notification, Runnable endRunnable) {
-        Runnable runnable = endRunnable;
+    public void transformTo(final TransformableView notification, final Runnable endRunnable) {
+        if (mViewTransformationAnimation != null) {
+            mViewTransformationAnimation.cancel();
+        }
+        mViewTransformationAnimation = ValueAnimator.ofFloat(0.0f, 1.0f);
+        mViewTransformationAnimation.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
+            @Override
+            public void onAnimationUpdate(ValueAnimator animation) {
+                transformTo(notification, animation.getAnimatedFraction());
+            }
+        });
+        mViewTransformationAnimation.setInterpolator(Interpolators.LINEAR);
+        mViewTransformationAnimation.setDuration(StackStateAnimator.ANIMATION_DURATION_STANDARD);
+        if (endRunnable != null) {
+            mViewTransformationAnimation.addListener(new AnimatorListenerAdapter() {
+                public boolean mCancelled;
+
+                @Override
+                public void onAnimationEnd(Animator animation) {
+                    endRunnable.run();
+                    if (!mCancelled) {
+                        setVisible(false);
+                    } else {
+                        abortTransformations();
+                    }
+                }
+
+                @Override
+                public void onAnimationCancel(Animator animation) {
+                    mCancelled = true;
+                }
+            });
+        }
+        mViewTransformationAnimation.start();
+    }
+
+    @Override
+    public void transformTo(TransformableView notification, float transformationAmount) {
         for (Integer viewType : mTransformedViews.keySet()) {
             TransformState ownState = getCurrentState(viewType);
             if (ownState != null) {
                 CustomTransformation customTransformation = mCustomTransformations.get(viewType);
                 if (customTransformation != null && customTransformation.transformTo(
-                        ownState, notification, runnable)) {
+                        ownState, notification, transformationAmount)) {
                     ownState.recycle();
-                    runnable = null;
                     continue;
                 }
                 TransformState otherState = notification.getCurrentState(viewType);
                 if (otherState != null) {
-                    boolean run = ownState.transformViewTo(otherState, runnable);
+                    ownState.transformViewTo(otherState, transformationAmount);
                     otherState.recycle();
-                    if (run) {
-                        runnable = null;
-                    }
                 } else {
                     // there's no other view available
-                    CrossFadeHelper.fadeOut(mTransformedViews.get(viewType), runnable);
-                    runnable = null;
+                    CrossFadeHelper.fadeOut(mTransformedViews.get(viewType), transformationAmount);
                 }
                 ownState.recycle();
             }
         }
-        if (runnable != null) {
-            // We need to post, since the visible type is only set after the transformation is
-            // started
-            mHandler.post(runnable);
-        }
     }
 
     @Override
-    public void transformFrom(TransformableView notification) {
+    public void transformFrom(final TransformableView notification) {
+        if (mViewTransformationAnimation != null) {
+            mViewTransformationAnimation.cancel();
+        }
+        mViewTransformationAnimation = ValueAnimator.ofFloat(0.0f, 1.0f);
+        mViewTransformationAnimation.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
+            @Override
+            public void onAnimationUpdate(ValueAnimator animation) {
+                transformFrom(notification, animation.getAnimatedFraction());
+            }
+        });
+        mViewTransformationAnimation.addListener(new AnimatorListenerAdapter() {
+            public boolean mCancelled;
+
+            @Override
+            public void onAnimationEnd(Animator animation) {
+                if (!mCancelled) {
+                    setVisible(true);
+                } else {
+                    abortTransformations();
+                }
+            }
+
+            @Override
+            public void onAnimationCancel(Animator animation) {
+                mCancelled = true;
+            }
+        });
+        mViewTransformationAnimation.setInterpolator(Interpolators.LINEAR);
+        mViewTransformationAnimation.setDuration(StackStateAnimator.ANIMATION_DURATION_STANDARD);
+        mViewTransformationAnimation.start();
+    }
+
+    @Override
+    public void transformFrom(TransformableView notification, float transformationAmount) {
         for (Integer viewType : mTransformedViews.keySet()) {
             TransformState ownState = getCurrentState(viewType);
             if (ownState != null) {
                 CustomTransformation customTransformation = mCustomTransformations.get(viewType);
                 if (customTransformation != null && customTransformation.transformFrom(
-                        ownState, notification)) {
+                        ownState, notification, transformationAmount)) {
                     ownState.recycle();
                     continue;
                 }
                 TransformState otherState = notification.getCurrentState(viewType);
                 if (otherState != null) {
-                    ownState.transformViewFrom(otherState);
+                    ownState.transformViewFrom(otherState, transformationAmount);
                     otherState.recycle();
                 } else {
                     // There's no other view, lets fade us in
                     // Certain views need to prepare the fade in and make sure its children are
                     // completely visible. An example is the notification header.
-                    ownState.prepareFadeIn();
-                    CrossFadeHelper.fadeIn(mTransformedViews.get(viewType));
+                    if (transformationAmount == 0.0f) {
+                        ownState.prepareFadeIn();
+                    }
+                    CrossFadeHelper.fadeIn(mTransformedViews.get(viewType), transformationAmount);
                 }
                 ownState.recycle();
             }
@@ -131,6 +197,16 @@
         }
     }
 
+    private void abortTransformations() {
+        for (Integer viewType : mTransformedViews.keySet()) {
+            TransformState ownState = getCurrentState(viewType);
+            if (ownState != null) {
+                ownState.abortTransformation();
+                ownState.recycle();
+            }
+        }
+    }
+
     /**
      * Add the remaining transformation views such that all views are being transformed correctly
      * @param viewRoot the root below which all elements need to be transformed
@@ -173,22 +249,44 @@
         }
     }
 
-    public interface CustomTransformation {
+    public static abstract class CustomTransformation {
         /**
          * Transform a state to the given view
          * @param ownState the state to transform
          * @param notification the view to transform to
+         * @param transformationAmount how much transformation should be done
          * @return whether a custom transformation is performed
          */
-        boolean transformTo(TransformState ownState, TransformableView notification,
-                Runnable endRunnable);
+        public abstract boolean transformTo(TransformState ownState,
+                TransformableView notification,
+                float transformationAmount);
 
         /**
          * Transform to this state from the given view
          * @param ownState the state to transform to
          * @param notification the view to transform from
+         * @param transformationAmount how much transformation should be done
          * @return whether a custom transformation is performed
          */
-        boolean transformFrom(TransformState ownState, TransformableView notification);
+        public abstract boolean transformFrom(TransformState ownState,
+                TransformableView notification,
+                float transformationAmount);
+
+        /**
+         * Perform a custom initialisation before transforming.
+         *
+         * @param ownState our own state
+         * @param otherState the other state
+         * @return whether a custom initialization is done
+         */
+        public boolean initTransformation(TransformState ownState,
+                TransformState otherState) {
+            return false;
+        }
+
+        public boolean customTransformTarget(TransformState ownState,
+                TransformState otherState) {
+            return false;
+        }
     }
 }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/HeaderTransformState.java b/packages/SystemUI/src/com/android/systemui/statusbar/notification/HeaderTransformState.java
index 81483c6..b66e9f3 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/HeaderTransformState.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/HeaderTransformState.java
@@ -46,7 +46,7 @@
     }
 
     @Override
-    public boolean transformViewTo(TransformState otherState, Runnable endRunnable) {
+    public boolean transformViewTo(TransformState otherState, float transformationAmount) {
         // if the transforming notification has a header, we have ensured that it looks the same
         // but the expand button, so lets fade just that one and transform the work profile icon.
         if (!(mTransformedView instanceof NotificationHeaderView)) {
@@ -62,14 +62,14 @@
             if (headerChild != mExpandButton) {
                 headerChild.setVisibility(View.INVISIBLE);
             } else {
-                CrossFadeHelper.fadeOut(mExpandButton, endRunnable);
+                CrossFadeHelper.fadeOut(mExpandButton, transformationAmount);
             }
         }
         return true;
     }
 
     @Override
-    public void transformViewFrom(TransformState otherState) {
+    public void transformViewFrom(TransformState otherState, float transformationAmount) {
         // if the transforming notification has a header, we have ensured that it looks the same
         // but the expand button, so lets fade just that one and transform the work profile icon.
         if (!(mTransformedView instanceof NotificationHeaderView)) {
@@ -85,12 +85,13 @@
                 continue;
             }
             if (headerChild == mExpandButton) {
-                CrossFadeHelper.fadeIn(mExpandButton);
+                CrossFadeHelper.fadeIn(mExpandButton, transformationAmount);
             } else {
                 headerChild.setVisibility(View.VISIBLE);
                 if (headerChild == mWorkProfileIcon) {
-                    mWorkProfileState.animateViewFrom(
-                            ((HeaderTransformState) otherState).mWorkProfileState);
+                    mWorkProfileState.transformViewFullyFrom(
+                            ((HeaderTransformState) otherState).mWorkProfileState,
+                            transformationAmount);
                 }
             }
         }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/HybridNotificationView.java b/packages/SystemUI/src/com/android/systemui/statusbar/notification/HybridNotificationView.java
index 81144d5..c80cad8 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/HybridNotificationView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/HybridNotificationView.java
@@ -71,13 +71,13 @@
                 new ViewTransformationHelper.CustomTransformation() {
                     @Override
                     public boolean transformTo(TransformState ownState, TransformableView notification,
-                            Runnable endRunnable) {
+                            float transformationAmount) {
                         // We want to transform to the same y location as the title
                         TransformState otherState = notification.getCurrentState(
                                 TRANSFORMING_VIEW_TITLE);
-                        CrossFadeHelper.fadeOut(mTextView, endRunnable);
+                        CrossFadeHelper.fadeOut(mTextView, transformationAmount);
                         if (otherState != null) {
-                            ownState.animateViewVerticalTo(otherState, endRunnable);
+                            ownState.transformViewVerticalTo(otherState, transformationAmount);
                             otherState.recycle();
                         }
                         return true;
@@ -85,13 +85,13 @@
 
                     @Override
                     public boolean transformFrom(TransformState ownState,
-                            TransformableView notification) {
+                            TransformableView notification, float transformationAmount) {
                         // We want to transform from the same y location as the title
                         TransformState otherState = notification.getCurrentState(
                                 TRANSFORMING_VIEW_TITLE);
-                        CrossFadeHelper.fadeIn(mTextView);
+                        CrossFadeHelper.fadeIn(mTextView, transformationAmount);
                         if (otherState != null) {
-                            ownState.animateViewVerticalFrom(otherState);
+                            ownState.transformViewVerticalFrom(otherState, transformationAmount);
                             otherState.recycle();
                         }
                         return true;
@@ -133,11 +133,21 @@
     }
 
     @Override
+    public void transformTo(TransformableView notification, float transformationAmount) {
+        mTransformationHelper.transformTo(notification, transformationAmount);
+    }
+
+    @Override
     public void transformFrom(TransformableView notification) {
         mTransformationHelper.transformFrom(notification);
     }
 
     @Override
+    public void transformFrom(TransformableView notification, float transformationAmount) {
+        mTransformationHelper.transformFrom(notification, transformationAmount);
+    }
+
+    @Override
     public void setVisible(boolean visible) {
         setVisibility(visible ? View.VISIBLE : View.INVISIBLE);
         mTransformationHelper.setVisible(visible);
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/ImageTransformState.java b/packages/SystemUI/src/com/android/systemui/statusbar/notification/ImageTransformState.java
index e891a97..45027c0 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/ImageTransformState.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/ImageTransformState.java
@@ -62,7 +62,7 @@
     }
 
     @Override
-    protected boolean animateScale() {
+    protected boolean transformScale() {
         return true;
     }
 
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/NotificationHeaderViewWrapper.java b/packages/SystemUI/src/com/android/systemui/statusbar/notification/NotificationHeaderViewWrapper.java
index 5a71caf..000f957 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/NotificationHeaderViewWrapper.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/NotificationHeaderViewWrapper.java
@@ -142,7 +142,8 @@
 
     protected void updateTransformedTypes() {
         mTransformationHelper.reset();
-        mTransformationHelper.addTransformedView(TransformableView.TRANSFORMING_VIEW_HEADER, mNotificationHeader);
+        mTransformationHelper.addTransformedView(TransformableView.TRANSFORMING_VIEW_HEADER,
+                mNotificationHeader);
     }
 
     @Override
@@ -299,11 +300,21 @@
     }
 
     @Override
+    public void transformTo(TransformableView notification, float transformationAmount) {
+        mTransformationHelper.transformTo(notification, transformationAmount);
+    }
+
+    @Override
     public void transformFrom(TransformableView notification) {
         mTransformationHelper.transformFrom(notification);
     }
 
     @Override
+    public void transformFrom(TransformableView notification, float transformationAmount) {
+        mTransformationHelper.transformFrom(notification, transformationAmount);
+    }
+
+    @Override
     public void setVisible(boolean visible) {
         super.setVisible(visible);
         mTransformationHelper.setVisible(visible);
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/NotificationTemplateViewWrapper.java b/packages/SystemUI/src/com/android/systemui/statusbar/notification/NotificationTemplateViewWrapper.java
index 0c21f0b..fd4eca8 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/NotificationTemplateViewWrapper.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/NotificationTemplateViewWrapper.java
@@ -49,76 +49,65 @@
                 new ViewTransformationHelper.CustomTransformation() {
                     @Override
                     public boolean transformTo(TransformState ownState,
-                            TransformableView notification, final Runnable endRunnable) {
+                            TransformableView notification, final float transformationAmount) {
                         if (!(notification instanceof HybridNotificationView)) {
                             return false;
                         }
                         TransformState otherState = notification.getCurrentState(
                                 TRANSFORMING_VIEW_TITLE);
                         final View text = ownState.getTransformedView();
-                        CrossFadeHelper.fadeOut(text, endRunnable);
+                        CrossFadeHelper.fadeOut(text, transformationAmount);
                         if (otherState != null) {
-                            int[] otherStablePosition = otherState.getLaidOutLocationOnScreen();
-                            int[] ownPosition = ownState.getLaidOutLocationOnScreen();
-                            text.animate()
-                                    .translationY((otherStablePosition[1]
-                                            + otherState.getTransformedView().getHeight()
-                                            - ownPosition[1]) * 0.33f)
-                                    .setDuration(
-                                            StackStateAnimator.ANIMATION_DURATION_STANDARD)
-                                    .setInterpolator(Interpolators.FAST_OUT_SLOW_IN)
-                                    .withEndAction(new Runnable() {
-                                        @Override
-                                        public void run() {
-                                            if (endRunnable != null) {
-                                                endRunnable.run();
-                                            }
-                                            TransformState.setClippingDeactivated(text,
-                                                    false);
-                                        }
-                                    });
-                            TransformState.setClippingDeactivated(text, true);
+                            ownState.transformViewVerticalTo(otherState, this,
+                                    transformationAmount);
                             otherState.recycle();
                         }
                         return true;
                     }
 
                     @Override
+                    public boolean customTransformTarget(TransformState ownState,
+                            TransformState otherState) {
+                        float endY = getTransformationY(ownState, otherState);
+                        ownState.setTransformationEndY(endY);
+                        return true;
+                    }
+
+                    @Override
                     public boolean transformFrom(TransformState ownState,
-                            TransformableView notification) {
+                            TransformableView notification, float transformationAmount) {
                         if (!(notification instanceof HybridNotificationView)) {
                             return false;
                         }
                         TransformState otherState = notification.getCurrentState(
                                 TRANSFORMING_VIEW_TITLE);
                         final View text = ownState.getTransformedView();
-                        boolean isVisible = text.getVisibility() == View.VISIBLE;
-                        CrossFadeHelper.fadeIn(text);
+                        CrossFadeHelper.fadeIn(text, transformationAmount);
                         if (otherState != null) {
-                            int[] otherStablePosition = otherState.getLaidOutLocationOnScreen();
-                            int[] ownStablePosition = ownState.getLaidOutLocationOnScreen();
-                            if (!isVisible) {
-                                text.setTranslationY((otherStablePosition[1]
-                                        + otherState.getTransformedView().getHeight()
-                                        - ownStablePosition[1]) * 0.33f);
-                            }
-                            text.animate()
-                                    .translationY(0)
-                                    .setDuration(
-                                            StackStateAnimator.ANIMATION_DURATION_STANDARD)
-                                    .setInterpolator(Interpolators.FAST_OUT_SLOW_IN)
-                                    .withEndAction(new Runnable() {
-                                        @Override
-                                        public void run() {
-                                            TransformState.setClippingDeactivated(text,
-                                                    false);
-                                        }
-                                    });
-                            TransformState.setClippingDeactivated(text, true);
+                            ownState.transformViewVerticalFrom(otherState, this,
+                                    transformationAmount);
                             otherState.recycle();
                         }
                         return true;
                     }
+
+                    @Override
+                    public boolean initTransformation(TransformState ownState,
+                            TransformState otherState) {
+                        float startY = getTransformationY(ownState, otherState);
+                        ownState.setTransformationStartY(startY);
+                        return true;
+                    }
+
+                    private float getTransformationY(TransformState ownState,
+                            TransformState otherState) {
+                        int[] otherStablePosition = otherState.getLaidOutLocationOnScreen();
+                        int[] ownStablePosition = ownState.getLaidOutLocationOnScreen();
+                        return (otherStablePosition[1]
+                                + otherState.getTransformedView().getHeight()
+                                - ownStablePosition[1]) * 0.33f;
+                    }
+
                 }, TRANSFORMING_VIEW_TEXT);
     }
 
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/NotificationUtils.java b/packages/SystemUI/src/com/android/systemui/statusbar/notification/NotificationUtils.java
index 7089b78..4738657 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/NotificationUtils.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/NotificationUtils.java
@@ -34,4 +34,8 @@
         v.setTag(R.id.icon_is_grayscale, grayscale);
         return grayscale;
     }
+
+    public static float interpolate(float start, float end, float amount) {
+        return start * (1.0f - amount) + end * amount;
+    }
 }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/NotificationViewWrapper.java b/packages/SystemUI/src/com/android/systemui/statusbar/notification/NotificationViewWrapper.java
index 328f8b5..d3503e7 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/NotificationViewWrapper.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/NotificationViewWrapper.java
@@ -98,12 +98,22 @@
     }
 
     @Override
+    public void transformTo(TransformableView notification, float transformationAmount) {
+        CrossFadeHelper.fadeOut(mView, transformationAmount);
+    }
+
+    @Override
     public void transformFrom(TransformableView notification) {
         // By default we are fading in completely
         CrossFadeHelper.fadeIn(mView);
     }
 
     @Override
+    public void transformFrom(TransformableView notification, float transformationAmount) {
+        CrossFadeHelper.fadeIn(mView, transformationAmount);
+    }
+
+    @Override
     public void setVisible(boolean visible) {
         mView.animate().cancel();
         mView.setVisibility(visible ? View.VISIBLE : View.INVISIBLE);
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/TransformState.java b/packages/SystemUI/src/com/android/systemui/statusbar/notification/TransformState.java
index 67d31be..f04fe5e 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/TransformState.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/TransformState.java
@@ -30,23 +30,30 @@
 import com.android.systemui.R;
 import com.android.systemui.statusbar.CrossFadeHelper;
 import com.android.systemui.statusbar.ExpandableNotificationRow;
-import com.android.systemui.statusbar.stack.StackStateAnimator;
+import com.android.systemui.statusbar.ViewTransformationHelper;
 
 /**
  * A transform state of a view.
 */
 public class TransformState {
 
-    private static final int ANIMATE_X = 0x1;
-    private static final int ANIMATE_Y = 0x10;
-    private static final int ANIMATE_ALL = ANIMATE_X | ANIMATE_Y;
+    private static final float UNDEFINED = -1f;
+    private static final int TRANSOFORM_X = 0x1;
+    private static final int TRANSOFORM_Y = 0x10;
+    private static final int TRANSOFORM_ALL = TRANSOFORM_X | TRANSOFORM_Y;
     private static final int CLIP_CLIPPING_SET = R.id.clip_children_set_tag;
     private static final int CLIP_CHILDREN_TAG = R.id.clip_children_tag;
     private static final int CLIP_TO_PADDING = R.id.clip_to_padding_tag;
+    private static final int TRANSFORMATION_START_X = R.id.transformation_start_x_tag;
+    private static final int TRANSFORMATION_START_Y = R.id.transformation_start_y_tag;
+    private static final int TRANSFORMATION_START_SCLALE_X = R.id.transformation_start_scale_x_tag;
+    private static final int TRANSFORMATION_START_SCLALE_Y = R.id.transformation_start_scale_y_tag;
     private static Pools.SimplePool<TransformState> sInstancePool = new Pools.SimplePool<>(40);
 
     protected View mTransformedView;
     private int[] mOwnPosition = new int[2];
+    private float mTransformationEndY = UNDEFINED;
+    private float mTransformationEndX = UNDEFINED;
 
     public void initFrom(View view) {
         mTransformedView = view;
@@ -55,129 +62,233 @@
     /**
      * Transforms the {@link #mTransformedView} from the given transformviewstate
      * @param otherState the state to transform from
+     * @param transformationAmount how much to transform
      */
-    public void transformViewFrom(TransformState otherState) {
+    public void transformViewFrom(TransformState otherState, float transformationAmount) {
         mTransformedView.animate().cancel();
         if (sameAs(otherState)) {
-            // We have the same content, lets show ourselves
-            mTransformedView.setAlpha(1.0f);
-            mTransformedView.setVisibility(View.VISIBLE);
+            if (mTransformedView.getVisibility() == View.INVISIBLE) {
+                // We have the same content, lets show ourselves
+                mTransformedView.setAlpha(1.0f);
+                mTransformedView.setVisibility(View.VISIBLE);
+            }
         } else {
-            CrossFadeHelper.fadeIn(mTransformedView);
+            CrossFadeHelper.fadeIn(mTransformedView, transformationAmount);
         }
-        animateViewFrom(otherState);
+        transformViewFullyFrom(otherState, transformationAmount);
     }
 
-    public void animateViewFrom(TransformState otherState) {
-        animateViewFrom(otherState, ANIMATE_ALL);
+    public void transformViewFullyFrom(TransformState otherState, float transformationAmount) {
+        transformViewFrom(otherState, TRANSOFORM_ALL, null, transformationAmount);
     }
 
-    public void animateViewVerticalFrom(TransformState otherState) {
-        animateViewFrom(otherState, ANIMATE_Y);
+    public void transformViewVerticalFrom(TransformState otherState,
+            ViewTransformationHelper.CustomTransformation customTransformation,
+            float transformationAmount) {
+        transformViewFrom(otherState, TRANSOFORM_Y, customTransformation, transformationAmount);
     }
 
-    private void animateViewFrom(TransformState otherState, int animationFlags) {
+    public void transformViewVerticalFrom(TransformState otherState, float transformationAmount) {
+        transformViewFrom(otherState, TRANSOFORM_Y, null, transformationAmount);
+    }
+
+    private void transformViewFrom(TransformState otherState, int transformationFlags,
+            ViewTransformationHelper.CustomTransformation customTransformation,
+            float transformationAmount) {
         final View transformedView = mTransformedView;
+        boolean transformX = (transformationFlags & TRANSOFORM_X) != 0;
+        boolean transformY = (transformationFlags & TRANSOFORM_Y) != 0;
+        boolean transformScale = transformScale();
         // lets animate the positions correctly
-        int[] otherPosition = otherState.getLocationOnScreen();
-        int[] ownStablePosition = getLaidOutLocationOnScreen();
-        if ((animationFlags & ANIMATE_X) != 0) {
-            transformedView.setTranslationX(otherPosition[0] - ownStablePosition[0]);
-            transformedView.animate().translationX(0);
-        }
-        if ((animationFlags & ANIMATE_Y) != 0) {
-            transformedView.setTranslationY(otherPosition[1] - ownStablePosition[1]);
-            transformedView.animate().translationY(0);
-        }
-        if (animateScale()) {
-            // we also want to animate the scale if we're the same
-            View otherView = otherState.getTransformedView();
-            if (otherView.getWidth() != transformedView.getWidth()) {
-                float scaleX = (otherView.getWidth() * otherView.getScaleX()
-                        / (float) transformedView.getWidth());
-                transformedView.setScaleX(scaleX);
-                transformedView.setPivotX(0);
-                transformedView.animate().scaleX(1.0f);
+        if (transformationAmount == 0.0f) {
+            int[] otherPosition = otherState.getLocationOnScreen();
+            int[] ownStablePosition = getLaidOutLocationOnScreen();
+            if (customTransformation == null
+                    || !customTransformation.initTransformation(this, otherState)) {
+                if (transformX) {
+                    setTransformationStartX(otherPosition[0] - ownStablePosition[0]);
+                }
+                if (transformY) {
+                    setTransformationStartY(otherPosition[1] - ownStablePosition[1]);
+                }
+                // we also want to animate the scale if we're the same
+                View otherView = otherState.getTransformedView();
+                if (transformScale && otherView.getWidth() != transformedView.getWidth()) {
+                    setTransformationStartScaleX(otherView.getWidth() * otherView.getScaleX()
+                            / (float) transformedView.getWidth());
+                    transformedView.setPivotX(0);
+                } else {
+                    setTransformationStartScaleX(UNDEFINED);
+                }
+                if (transformScale && otherView.getHeight() != transformedView.getHeight()) {
+                    setTransformationStartScaleY(otherView.getHeight() * otherView.getScaleY()
+                            / (float) transformedView.getHeight());
+                    transformedView.setPivotY(0);
+                } else {
+                    setTransformationStartScaleY(UNDEFINED);
+                }
             }
-            if (otherView.getHeight() != transformedView.getHeight()) {
-                float scaleY = (otherView.getHeight() * otherView.getScaleY()
-                        / (float) transformedView.getHeight());
-                transformedView.setScaleY(scaleY);
-                transformedView.setPivotY(0);
-                transformedView.animate().scaleY(1.0f);
+            if (!transformX) {
+                setTransformationStartX(UNDEFINED);
+            }
+            if (!transformY) {
+                setTransformationStartY(UNDEFINED);
+            }
+            if (!transformScale) {
+                setTransformationStartScaleX(UNDEFINED);
+                setTransformationStartScaleY(UNDEFINED);
+            }
+            setClippingDeactivated(transformedView, true);
+        }
+        float interpolatedValue = Interpolators.FAST_OUT_SLOW_IN.getInterpolation(
+                transformationAmount);
+        if (transformX) {
+            transformedView.setTranslationX(NotificationUtils.interpolate(getTransformationStartX(),
+                    0.0f,
+                    interpolatedValue));
+        }
+        if (transformY) {
+            transformedView.setTranslationY(NotificationUtils.interpolate(getTransformationStartY(),
+                    0.0f,
+                    interpolatedValue));
+        }
+        if (transformScale) {
+            float transformationStartScaleX = getTransformationStartScaleX();
+            if (transformationStartScaleX != UNDEFINED) {
+                transformedView.setScaleX(
+                        NotificationUtils.interpolate(transformationStartScaleX,
+                                1.0f,
+                                interpolatedValue));
+            }
+            float transformationStartScaleY = getTransformationStartScaleY();
+            if (transformationStartScaleY != UNDEFINED) {
+                transformedView.setScaleY(
+                        NotificationUtils.interpolate(transformationStartScaleY,
+                                1.0f,
+                                interpolatedValue));
             }
         }
-        transformedView.animate()
-                .setInterpolator(Interpolators.FAST_OUT_SLOW_IN)
-                .setDuration(StackStateAnimator.ANIMATION_DURATION_STANDARD)
-                .withEndAction(new Runnable() {
-                    @Override
-                    public void run() {
-                        setClippingDeactivated(transformedView, false);
-                    }
-                });
-        setClippingDeactivated(transformedView, true);
     }
 
-    protected boolean animateScale() {
+    protected boolean transformScale() {
         return false;
     }
 
     /**
      * Transforms the {@link #mTransformedView} to the given transformviewstate
      * @param otherState the state to transform from
-     * @param endRunnable a runnable to run at the end of the animation
+     * @param transformationAmount how much to transform
      * @return whether an animation was started
      */
-    public boolean transformViewTo(TransformState otherState, final Runnable endRunnable) {
+    public boolean transformViewTo(TransformState otherState, float transformationAmount) {
         mTransformedView.animate().cancel();
         if (sameAs(otherState)) {
             // We have the same text, lets show ourselfs
-            mTransformedView.setAlpha(0.0f);
-            mTransformedView.setVisibility(View.INVISIBLE);
+            if (mTransformedView.getVisibility() == View.VISIBLE) {
+                mTransformedView.setAlpha(0.0f);
+                mTransformedView.setVisibility(View.INVISIBLE);
+            }
             return false;
         } else {
-            CrossFadeHelper.fadeOut(mTransformedView, endRunnable);
+            CrossFadeHelper.fadeOut(mTransformedView, transformationAmount);
         }
-        animateViewTo(otherState, endRunnable);
+        transformViewFullyTo(otherState, transformationAmount);
         return true;
     }
 
-    public void animateViewTo(TransformState otherState, Runnable endRunnable) {
-        animateViewTo(otherState, endRunnable, ANIMATE_ALL);
+    public void transformViewFullyTo(TransformState otherState, float transformationAmount) {
+        transformViewTo(otherState, TRANSOFORM_ALL, null, transformationAmount);
     }
 
-    public void animateViewVerticalTo(TransformState otherState, Runnable endRunnable) {
-        animateViewTo(otherState, endRunnable, ANIMATE_Y);
+    public void transformViewVerticalTo(TransformState otherState,
+            ViewTransformationHelper.CustomTransformation customTransformation,
+            float transformationAmount) {
+        transformViewTo(otherState, TRANSOFORM_Y, customTransformation, transformationAmount);
     }
 
-    private void animateViewTo(TransformState otherState, final Runnable endRunnable,
-            int animationFlags) {
+    public void transformViewVerticalTo(TransformState otherState, float transformationAmount) {
+        transformViewTo(otherState, TRANSOFORM_Y, null, transformationAmount);
+    }
+
+    private void transformViewTo(TransformState otherState, int transformationFlags,
+            ViewTransformationHelper.CustomTransformation customTransformation,
+            float transformationAmount) {
         // lets animate the positions correctly
+
+        final View transformedView = mTransformedView;
+        boolean transformX = (transformationFlags & TRANSOFORM_X) != 0;
+        boolean transformY = (transformationFlags & TRANSOFORM_Y) != 0;
+        boolean transformScale = transformScale();
+        // lets animate the positions correctly
+        if (transformationAmount == 0.0f) {
+            if (transformX) {
+                float transformationStartX = getTransformationStartX();
+                float start = transformationStartX != UNDEFINED ? transformationStartX
+                        : transformedView.getTranslationX();
+                setTransformationStartX(start);
+            }
+            if (transformY) {
+                float transformationStartY = getTransformationStartY();
+                float start = transformationStartY != UNDEFINED ? transformationStartY
+                        : transformedView.getTranslationY();
+                setTransformationStartY(start);
+            }
+            View otherView = otherState.getTransformedView();
+            if (transformScale && otherView.getWidth() != transformedView.getWidth()) {
+                setTransformationStartScaleX(transformedView.getScaleX());
+                transformedView.setPivotX(0);
+            } else {
+                setTransformationStartScaleX(UNDEFINED);
+            }
+            if (transformScale && otherView.getHeight() != transformedView.getHeight()) {
+                setTransformationStartScaleY(transformedView.getScaleY());
+                transformedView.setPivotY(0);
+            } else {
+                setTransformationStartScaleY(UNDEFINED);
+            }
+            setClippingDeactivated(transformedView, true);
+        }
+        float interpolatedValue = Interpolators.FAST_OUT_SLOW_IN.getInterpolation(
+                transformationAmount);
         int[] otherStablePosition = otherState.getLaidOutLocationOnScreen();
         int[] ownPosition = getLaidOutLocationOnScreen();
-        final View transformedView = mTransformedView;
-        if ((animationFlags & ANIMATE_X) != 0) {
-            transformedView.animate()
-                    .translationX(otherStablePosition[0] - ownPosition[0]);
+        if (transformX) {
+            float endX = otherStablePosition[0] - ownPosition[0];
+            if (customTransformation != null
+                    && customTransformation.customTransformTarget(this, otherState)) {
+                endX = mTransformationEndX;
+            }
+            transformedView.setTranslationX(NotificationUtils.interpolate(getTransformationStartX(),
+                    endX,
+                    interpolatedValue));
         }
-        if ((animationFlags & ANIMATE_Y) != 0) {
-            transformedView.animate()
-                    .translationY(otherStablePosition[1] - ownPosition[1]);
+        if (transformY) {
+            float endY = otherStablePosition[1] - ownPosition[1];
+            if (customTransformation != null
+                    && customTransformation.customTransformTarget(this, otherState)) {
+                endY = mTransformationEndY;
+            }
+            transformedView.setTranslationY(NotificationUtils.interpolate(getTransformationStartY(),
+                    endY,
+                    interpolatedValue));
         }
-        transformedView.animate()
-                .setInterpolator(Interpolators.FAST_OUT_SLOW_IN)
-                .setDuration(StackStateAnimator.ANIMATION_DURATION_STANDARD)
-                .withEndAction(new Runnable() {
-                    @Override
-                    public void run() {
-                        if (endRunnable != null) {
-                            endRunnable.run();
-                        }
-                        setClippingDeactivated(transformedView, false);
-                    }
-                });
-        setClippingDeactivated(transformedView, true);
+        if (transformScale) {
+            View otherView = otherState.getTransformedView();
+            float transformationStartScaleX = getTransformationStartScaleX();
+            if (transformationStartScaleX != UNDEFINED) {
+                transformedView.setScaleX(
+                        NotificationUtils.interpolate(transformationStartScaleX,
+                                (otherView.getWidth() / (float) transformedView.getWidth()),
+                                interpolatedValue));
+            }
+            float transformationStartScaleY = getTransformationStartScaleY();
+            if (transformationStartScaleY != UNDEFINED) {
+                transformedView.setScaleY(
+                        NotificationUtils.interpolate(transformationStartScaleY,
+                                (otherView.getHeight() / (float) transformedView.getHeight()),
+                                interpolatedValue));
+            }
+        }
     }
 
     public static void setClippingDeactivated(final View transformedView, boolean deactivated) {
@@ -281,8 +392,54 @@
         }
     }
 
+    public void setTransformationEndY(float transformationEndY) {
+        mTransformationEndY = transformationEndY;
+    }
+
+    public void setTransformationEndX(float transformationEndX) {
+        mTransformationEndX = transformationEndX;
+    }
+
+    public float getTransformationStartX() {
+        Object tag = mTransformedView.getTag(TRANSFORMATION_START_X);
+        return tag == null ? UNDEFINED : (float) tag;
+    }
+
+    public float getTransformationStartY() {
+        Object tag = mTransformedView.getTag(TRANSFORMATION_START_Y);
+        return tag == null ? UNDEFINED : (float) tag;
+    }
+
+    public float getTransformationStartScaleX() {
+        Object tag = mTransformedView.getTag(TRANSFORMATION_START_SCLALE_X);
+        return tag == null ? UNDEFINED : (float) tag;
+    }
+
+    public float getTransformationStartScaleY() {
+        Object tag = mTransformedView.getTag(TRANSFORMATION_START_SCLALE_Y);
+        return tag == null ? UNDEFINED : (float) tag;
+    }
+
+    public void setTransformationStartX(float transformationStartX) {
+        mTransformedView.setTag(TRANSFORMATION_START_X, transformationStartX);
+    }
+
+    public void setTransformationStartY(float transformationStartY) {
+        mTransformedView.setTag(TRANSFORMATION_START_Y, transformationStartY);
+    }
+
+    private void setTransformationStartScaleX(float startScaleX) {
+        mTransformedView.setTag(TRANSFORMATION_START_SCLALE_X, startScaleX);
+    }
+
+    private void setTransformationStartScaleY(float startScaleY) {
+        mTransformedView.setTag(TRANSFORMATION_START_SCLALE_Y, startScaleY);
+    }
+
     protected void reset() {
         mTransformedView = null;
+        mTransformationEndX = UNDEFINED;
+        mTransformationEndY = UNDEFINED;
     }
 
     public void setVisible(boolean visible) {
@@ -306,6 +463,15 @@
         mTransformedView.setTranslationY(0);
         mTransformedView.setScaleX(1.0f);
         mTransformedView.setScaleY(1.0f);
+        setClippingDeactivated(mTransformedView, false);
+        abortTransformation();
+    }
+
+    public void abortTransformation() {
+        mTransformedView.setTag(TRANSFORMATION_START_X, UNDEFINED);
+        mTransformedView.setTag(TRANSFORMATION_START_Y, UNDEFINED);
+        mTransformedView.setTag(TRANSFORMATION_START_SCLALE_X, UNDEFINED);
+        mTransformedView.setTag(TRANSFORMATION_START_SCLALE_Y, UNDEFINED);
     }
 
     public static TransformState obtain() {