Invert the sense of the two-figner direction on tablets.

Bug: 6506376
Change-Id: Ife336c6695608f14554e18e32ea35f118d7f12e2

3 files changed, 27 insertions, 2 deletions

diff --git a/packages/SystemUI/src/com/android/systemui/ExpandHelper.java b/packages/SystemUI/src/com/android/systemui/ExpandHelper.java
index df41d25..48efbc7 100644
--- a/packages/SystemUI/src/com/android/systemui/ExpandHelper.java
+++ b/packages/SystemUI/src/com/android/systemui/ExpandHelper.java
@@ -23,11 +23,14 @@ import android.animation.AnimatorSet;
 import android.animation.ObjectAnimator;
 import android.content.Context;
 import android.util.Log;
+import android.view.Gravity;
 import android.view.MotionEvent;
 import android.view.ScaleGestureDetector;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.View.OnClickListener;
+import android.widget.ScrollView;
+import android.widget.FrameLayout;
 
 public class ExpandHelper implements Gefingerpoken, OnClickListener {
     public interface Callback {
@@ -38,7 +41,7 @@ public class ExpandHelper implements Gefingerpoken, OnClickListener {
     }
 
     private static final String TAG = "ExpandHelper";
-    protected static final boolean DEBUG = false;
+    protected static final boolean DEBUG = true;
     private static final long EXPAND_DURATION = 250;
     private static final long GLOW_DURATION = 150;
 
@@ -82,8 +85,11 @@ public class ExpandHelper implements Gefingerpoken, OnClickListener {
     private int mLargeSize;
     private float mMaximumStretch;
 
+    private int mGravity;
+
     private class ViewScaler {
         View mView;
+
         public ViewScaler() {}
         public void setView(View v) {
             mView = v;
@@ -119,6 +125,15 @@ public class ExpandHelper implements Gefingerpoken, OnClickListener {
         }
     }
 
+    /**
+     * Handle expansion gestures to expand and contract children of the callback.
+     *
+     * @param context application context
+     * @param callback the container that holds the items to be manipulated
+     * @param small the smallest allowable size for the manuipulated items.
+     * @param large the largest allowable size for the manuipulated items.
+     * @param scoller if non-null also manipulate the scroll position to obey the gravity.
+     */
     public ExpandHelper(Context context, Callback callback, int small, int large) {
         mSmallSize = small;
         mMaximumStretch = mSmallSize * STRETCH_INTERVAL;
@@ -126,7 +141,7 @@ public class ExpandHelper implements Gefingerpoken, OnClickListener {
         mContext = context;
         mCallback = callback;
         mScaler = new ViewScaler();
-
+        mGravity = Gravity.TOP;
         mScaleAnimation = ObjectAnimator.ofFloat(mScaler, "height", 0f);
         mScaleAnimation.setDuration(EXPAND_DURATION);
 
@@ -194,6 +209,7 @@ public class ExpandHelper implements Gefingerpoken, OnClickListener {
                 span *= USE_SPAN ? 1f : 0f;
                 float drag = detector.getFocusY() - mInitialTouchFocusY;
                 drag *= USE_DRAG ? 1f : 0f;
+                drag *= mGravity == Gravity.BOTTOM ? -1f : 1f;
                 float pull = Math.abs(drag) + Math.abs(span) + 1f;
                 float hand = drag * Math.abs(drag) / pull + span * Math.abs(span) / pull;
                 if (DEBUG) Log.d(TAG, "current span handle is: " + hand);
@@ -227,6 +243,10 @@ public class ExpandHelper implements Gefingerpoken, OnClickListener {
         mEventSource = eventSource;
     }
 
+    public void setGravity(int gravity) {
+        mGravity = gravity;
+    }
+
     public void setGlow(float glow) {
         if (!mGlowAnimationSet.isRunning() || glow == 0f) {
             if (mGlowAnimationSet.isRunning()) {
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarWindowView.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarWindowView.java
index ed1b2f5..9317561 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarWindowView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarWindowView.java
@@ -22,6 +22,7 @@ import android.util.Log;
 import android.view.KeyEvent;
 import android.view.MotionEvent;
 import android.widget.FrameLayout;
+import android.widget.ScrollView;
 import android.widget.TextSwitcher;
 
 import com.android.systemui.ExpandHelper;
@@ -47,6 +48,7 @@ public class StatusBarWindowView extends FrameLayout
     protected void onAttachedToWindow () {
         super.onAttachedToWindow();
         latestItems = (NotificationRowLayout) findViewById(R.id.latestItems);
+        ScrollView scroller = (ScrollView) findViewById(R.id.scroll);
         int minHeight = getResources().getDimensionPixelSize(R.dimen.notification_row_min_height);
         int maxHeight = getResources().getDimensionPixelSize(R.dimen.notification_row_max_height);
         mExpandHelper = new ExpandHelper(mContext, latestItems, minHeight, maxHeight);
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/tablet/NotificationPanel.java b/packages/SystemUI/src/com/android/systemui/statusbar/tablet/NotificationPanel.java
index 71657f5..992dcee 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/tablet/NotificationPanel.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/tablet/NotificationPanel.java
@@ -24,6 +24,7 @@ import android.content.Context;
 import android.graphics.Rect;
 import android.util.AttributeSet;
 import android.util.Slog;
+import android.view.Gravity;
 import android.view.LayoutInflater;
 import android.view.MotionEvent;
 import android.view.View;
@@ -33,6 +34,7 @@ import android.view.animation.AccelerateInterpolator;
 import android.view.animation.DecelerateInterpolator;
 import android.view.animation.Interpolator;
 import android.widget.RelativeLayout;
+import android.widget.ScrollView;
 
 import com.android.systemui.ExpandHelper;
 import com.android.systemui.R;
@@ -116,6 +118,7 @@ public class NotificationPanel extends RelativeLayout implements StatusBarPanel,
         int maxHeight = getResources().getDimensionPixelSize(R.dimen.notification_row_max_height);
         mExpandHelper = new ExpandHelper(mContext, latestItems, minHeight, maxHeight);
         mExpandHelper.setEventSource(this);
+        mExpandHelper.setGravity(Gravity.BOTTOM);
     }
 
     private View.OnClickListener mClearButtonListener = new View.OnClickListener() {