PhotoTable Polish:

 + remove manual rotation
 + better icon
 + gradient background
 + remove tap to dismiss
 + (temporarily disabled) flick to replace

Change-Id: I2177077e37ce07a131a67bfbd11f8a447775ab98

10 files changed, 357 insertions, 153 deletions

diff --git a/res/drawable/table.xml b/res/drawable/table.xml
new file mode 100644
index 0000000..4663f51
--- /dev/null
+++ b/res/drawable/table.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2012 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<shape
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <gradient
+        android:angle="90"
+        android:startColor="@color/tabletop_light"
+        android:endColor="@color/tabletop_dark"
+        android:type="linear"
+        />
+    <padding
+        android:left="10dp"
+        android:top="10dp"
+        android:right="10dp"
+        android:bottom="10dp" />
+</shape>
diff --git a/res/layout/photo.xml b/res/layout/photo.xml
index 988dbe4..1850c21 100644
--- a/res/layout/photo.xml
+++ b/res/layout/photo.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (C) 2011 The Android Open Source Project
+<!-- Copyright (C) 2012 The Android Open Source Project
 
      Licensed under the Apache License, Version 2.0 (the "License");
      you may not use this file except in compliance with the License.
diff --git a/res/mipmap-hdpi/icon.png b/res/mipmap-hdpi/icon.png
index b57ffa4..869cf89 100644
--- a/res/mipmap-hdpi/icon.png
+++ b/res/mipmap-hdpi/icon.png
diff --git a/res/mipmap-mdpi/icon.png b/res/mipmap-mdpi/icon.png
index 5cd2f30..682ab14 100644
--- a/res/mipmap-mdpi/icon.png
+++ b/res/mipmap-mdpi/icon.png
diff --git a/res/mipmap-xhdpi/icon.png b/res/mipmap-xhdpi/icon.png
new file mode 100644
index 0000000..dc36096
--- /dev/null
+++ b/res/mipmap-xhdpi/icon.png
diff --git a/res/values-sw800dp/config.xml b/res/values-sw800dp/config.xml
index 7771f21..eff4c2b 100644
--- a/res/values-sw800dp/config.xml
+++ b/res/values-sw800dp/config.xml
@@ -14,6 +14,9 @@
      limitations under the License.
 -->
 <resources>
+  <!-- Number of photos to drop when the screensaver starts.-->
+  <integer name="initial_drop">5</integer>
+
   <!-- Parts per million ratio between image size and screen size. -->
   <integer name="image_ratio">500000</integer>
 </resources>
diff --git a/res/values/colors.xml b/res/values/colors.xml
index 9d5864e..279c0c9 100644
--- a/res/values/colors.xml
+++ b/res/values/colors.xml
@@ -14,5 +14,6 @@
      limitations under the License.
 -->
 <resources>
-    <color name="tabletop">#ff444444</color>
+    <color name="tabletop_dark">#ff222222</color>
+    <color name="tabletop_light">#ff111111</color>
 </resources>
diff --git a/res/values/config.xml b/res/values/config.xml
index f1c9fcc..c510c2e 100644
--- a/res/values/config.xml
+++ b/res/values/config.xml
@@ -27,7 +27,25 @@
   <!-- Parts per million ratio between image size and screen size. -->
   <integer name="image_ratio">1000000</integer>
 
+  <!-- Parts per million ratio between image size on the table and screen size. -->
+  <integer name="table_ratio">500000</integer>
+
+  <!-- The maximum allowed rotation of images thrown onto the table. -->
+  <integer name="max_image_rotation">30</integer>
+
   <!-- Maximum number of image paths to load before shuffling. -->
   <integer name="image_queue_size">1000</integer>
+
+  <!-- Enable manual rotation of images. -->
+  <bool name="enable_manual_image_rotation">false</bool>
+
+  <!-- Enable flinging away photos. -->
+  <bool name="enable_fling">false</bool>
+
+  <!-- Honor tap on table to exit. -->
+  <bool name="enable_tap_to_exit">false</bool>
+
+  <!-- Parts per million damping coefficient of the table. -->
+  <integer name="table_damping">500000</integer>
 </resources>
 
diff --git a/res/values/dimen.xml b/res/values/dimen.xml
index 7e070df..eaf42ef 100644
--- a/res/values/dimen.xml
+++ b/res/values/dimen.xml
@@ -14,5 +14,6 @@
      limitations under the License.
 -->
 <resources>
+    <!-- Amount photo is inset to account for the frame. -->
     <dimen name="photo_inset">4px</dimen>
 </resources>
diff --git a/src/com/android/dreams/phototable/PhotoTable.java b/src/com/android/dreams/phototable/PhotoTable.java
index 082b3b5..9066396 100644
--- a/src/com/android/dreams/phototable/PhotoTable.java
+++ b/src/com/android/dreams/phototable/PhotoTable.java
@@ -31,12 +31,13 @@ import android.os.AsyncTask;
 import android.os.PowerManager;
 import android.util.AttributeSet;
 import android.util.Log;
+import android.view.GestureDetector;
 import android.view.LayoutInflater;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.ViewConfiguration;
+import android.view.ViewPropertyAnimator;
 import android.view.animation.DecelerateInterpolator;
-import android.view.animation.LinearInterpolator;
 import android.widget.FrameLayout;
 import android.widget.FrameLayout.LayoutParams;
 import android.widget.ImageView;
@@ -68,6 +69,284 @@ public class PhotoTable extends Dream {
 
     private Table mTable;
 
+    static class PhotoTouchListener implements View.OnTouchListener,
+            GestureDetector.OnGestureListener {
+        private static final int INVALID_POINTER = -1;
+        private static final int MAX_POINTER_COUNT = 10;
+        private final int mTouchSlop;
+        private final int mTapTimeout;
+        private final Table mTable;
+        private final GestureDetector mDetector;
+        private final float mBeta;
+        private final float mTableRatio;
+        private final boolean mEnableFling;
+        private View mTarget;
+        private float mInitialTouchX;
+        private float mInitialTouchY;
+        private float mInitialTouchA;
+        private long mInitialTouchTime;
+        private float mInitialTargetX;
+        private float mInitialTargetY;
+        private float mInitialTargetA;
+        private int mA = INVALID_POINTER;
+        private int mB = INVALID_POINTER;
+        private float[] pts = new float[MAX_POINTER_COUNT];
+
+        public PhotoTouchListener(Context context, Table table) {
+            mTable = table;
+            mDetector = new GestureDetector(context, this);
+            final ViewConfiguration configuration = ViewConfiguration.get(context);
+            mTouchSlop = configuration.getScaledTouchSlop();
+            mTapTimeout = configuration.getTapTimeout();
+            final Resources resources = context.getResources();
+            mBeta = resources.getInteger(R.integer.table_damping) / 1000000f;
+            mTableRatio = resources.getInteger(R.integer.table_ratio) / 1000000f;
+            mEnableFling = resources.getBoolean(R.bool.enable_fling);
+        }
+
+        /** Get angle defined by first two touches, in degrees */
+        private float getAngle(View target, MotionEvent ev) {
+            float alpha = 0f;
+            int a = ev.findPointerIndex(mA);
+            int b = ev.findPointerIndex(mB);
+            if (a >=0 && b >=0) {
+                alpha = (float) (Math.atan2(pts[2*a + 1] - pts[2*b + 1],
+                                            pts[2*a] - pts[2*b]) *
+                                 180f / Math.PI);
+            }
+            return alpha;
+        }
+
+        private void resetTouch(View target) {
+            mInitialTouchX = -1;
+            mInitialTouchY = -1;
+            mInitialTouchA = 0f;
+            mInitialTargetX = (float) target.getX();
+            mInitialTargetY = (float) target.getY();
+            mInitialTargetA = (float) target.getRotation();
+        }
+
+        @Override
+        public boolean onDown(MotionEvent e) {
+            return false;
+        }
+
+        @Override
+        public void onLongPress(MotionEvent e) {
+        }
+
+        @Override
+        public boolean onScroll(MotionEvent e1, MotionEvent e2, float deltaX, float deltaY) {
+            return false;
+        }
+
+        @Override
+        public void onShowPress(MotionEvent e) {
+        }
+
+        @Override
+        public boolean onSingleTapUp(MotionEvent e) {
+            return false;
+        }
+
+        @Override
+        public boolean onFling(MotionEvent e1, MotionEvent e2, float dX, float dY) {
+            if (!mEnableFling) {
+                return false;
+            }
+            pts[0] = dX;
+            pts[1] = dY;
+            mTarget.getMatrix().mapVectors(pts);
+            // velocity components in global coordinate frame
+            dX = - pts[0];
+            dY = - pts[1];
+
+            if (DEBUG) {
+                Log.i(TAG, "fling " + dX + ", " + dY);
+            }
+
+            final int idx = e2.getActionIndex();
+            pts[0] = e2.getX(idx);
+            pts[1] = e2.getY(idx);
+            mTarget.getMatrix().mapPoints(pts);
+            // starting position compionents in global corrdinate frame
+            final float x0 = pts[0];
+            final float y0 = pts[1];
+
+            // velocity
+            final float v = (float) Math.hypot(dX, dY);
+            // number of steps to come to a stop
+            final float n = (float) (- Math.log(v) / Math.log(mBeta));
+            // distance travelled before stopping
+            final float s = (float) (v * (1f - Math.pow(mBeta, n)) / (1f - mBeta));
+
+            // ending posiiton after stopping
+            final float x1 = x0 + s * dX / v;
+            final float y1 = y0 + s * dY / v;
+
+            if (DEBUG) {
+                Log.i(TAG, "fling v = " + v);
+                Log.i(TAG, "fling n = " + n);
+                Log.i(TAG, "fling s = " + n);
+                Log.i(TAG, "fling x0 = " + x0);
+                Log.i(TAG, "fling y0 = " + y0);
+                Log.i(TAG, "fling x1 = " + x1);
+                Log.i(TAG, "fling y1 = " + y1);
+            }
+
+            final float photoWidth = ((Integer) mTarget.getTag(R.id.photo_width)).floatValue();
+            final float photoHeight = ((Integer) mTarget.getTag(R.id.photo_height)).floatValue();
+            final float tableWidth = mTable.getWidth();
+            final float tableHeight = mTable.getHeight();
+
+            pts[0] = 0f;
+            pts[1] = 0f;
+            pts[2] = photoHeight;
+            pts[3] = photoWidth;
+            mTarget.getMatrix().mapPoints(pts);
+            pts[0] += x1;
+            pts[1] += y1;
+            pts[2] += x1;
+            pts[3] += y1;
+
+            boolean xOut = true;
+            boolean yOut = true;
+            for (int i = 0; i < 2; i++) {
+                if(pts[2 * i] >= 0f && pts[2 * i] < tableWidth) {
+                    xOut = false;
+                    if (DEBUG) {
+                        Log.i(TAG, "fling x in: " + pts[2 * i]);
+                    }
+                }
+                if(pts[2 * i + 1] >= 0f && pts[2 * i + 1] < tableHeight) {
+                    yOut = false;
+                    if (DEBUG) {
+                        Log.i(TAG, "fling y in: " + pts[2 * i + 1]);
+                    }
+                }
+            }
+            final View photo = mTarget;
+            ViewPropertyAnimator animator = photo.animate()
+                    .withLayer()
+                    .x(x1)
+                    .y(y1)
+                    .setDuration((int) (100f * n));
+
+            if (xOut || yOut) {
+                if (DEBUG) {
+                    Log.i(TAG, "fling away");
+                }
+                animator.withEndAction(new Runnable() {
+                        @Override
+                            public void run() {
+                                mTable.fadeAway(photo);
+                                mTable.launch();
+                            }
+                    });
+            }
+
+            return true;
+        }
+
+        @Override
+        public boolean onTouch(View target, MotionEvent ev) {
+            mTarget = target;
+            if (mDetector.onTouchEvent(ev)) {
+                return true;
+            }
+            final int action = ev.getActionMasked();
+
+            // compute raw coordinates
+            for(int i = 0; i < 10 && i < ev.getPointerCount(); i++) {
+                pts[i*2] = ev.getX(i);
+                pts[i*2 + 1] = ev.getY(i);
+            }
+            target.getMatrix().mapPoints(pts);
+
+            switch (action) {
+            case MotionEvent.ACTION_DOWN:
+                mTable.moveToBackOfQueue(target);
+                mInitialTouchTime = ev.getEventTime();
+                mA = ev.getPointerId(ev.getActionIndex());
+                resetTouch(target);
+                break;
+
+            case MotionEvent.ACTION_POINTER_DOWN:
+                if (mB == INVALID_POINTER) {
+                    mB = ev.getPointerId(ev.getActionIndex());
+                    mInitialTouchA = getAngle(target, ev);
+                }
+                break;
+
+            case MotionEvent.ACTION_POINTER_UP:
+                if (mB == ev.getPointerId(ev.getActionIndex())) {
+                    mB = INVALID_POINTER;
+                    mInitialTargetA = (float) target.getRotation();
+                }
+                if (mA == ev.getPointerId(ev.getActionIndex())) {
+                    mA = mB;
+                    resetTouch(target);
+                    mB = INVALID_POINTER;
+                }
+                break;
+
+            case MotionEvent.ACTION_MOVE: {
+                    if (mA != INVALID_POINTER) {
+                        int idx = ev.findPointerIndex(mA);
+                        float x = pts[2 * idx];
+                        float y = pts[2 * idx + 1];
+                        if (mInitialTouchX == -1 && mInitialTouchY == -1) {
+                            mInitialTouchX = x;
+                            mInitialTouchY = y;
+                        }
+                        if (mTable.getSelected() != target) {
+                            target.animate().cancel();
+
+                            target.setX((int) (mInitialTargetX + x - mInitialTouchX));
+                            target.setY((int) (mInitialTargetY + y - mInitialTouchY));
+                            if (mTable.mManualImageRotation && mB != INVALID_POINTER) {
+                                float a = getAngle(target, ev);
+                                target.setRotation(
+                                        (int) (mInitialTargetA + a - mInitialTouchA));
+                            }
+                        }
+                    }
+                }
+                break;
+
+            case MotionEvent.ACTION_UP: {
+                    if (mA != INVALID_POINTER) {
+                        int idx = ev.findPointerIndex(mA);
+                        float x = pts[2 * idx];
+                        float y = pts[2 * idx + 1];
+                        if (mInitialTouchX == -1 && mInitialTouchY == -1) {
+                            mInitialTouchX = x;
+                            mInitialTouchY = y;
+                        }
+                        double distance = Math.hypot(x - mInitialTouchX,
+                                                     y - mInitialTouchY);
+                        if (mTable.getSelected() == target) {
+                            mTable.dropOnTable(target);
+                            mTable.clearSelection();
+                        } else if ((ev.getEventTime() - mInitialTouchTime) < mTapTimeout &&
+                                   distance < mTouchSlop) {
+                            // tap
+                            target.animate().cancel();
+                            mTable.setSelection(target);
+                        }
+                        mA = INVALID_POINTER;
+                        mB = INVALID_POINTER;
+                    }
+                }
+                break;
+
+            case MotionEvent.ACTION_CANCEL:
+                break;
+            }
+            return true;
+        }
+    }
+
     public static class Table extends FrameLayout {
         class Launcher implements Runnable {
             private final Table mTable;
@@ -89,12 +368,14 @@ public class PhotoTable extends Dream {
         private final Dream mDream;
         private final int mDropPeriod;
         private final float mImageRatio;
+        private final float mTableRatio;
+        private final float mImageRotationLimit;
+        private final boolean mManualImageRotation;
+        private final boolean mTapToExit;
         private final int mTableCapacity;
         private final int mInset;
         private final LocalSource mLocalSource;
         private final Resources mResources;
-        private final int mTouchSlop;
-        private final int mTapTimeout;
         private boolean mStarted;
         private boolean mIsLandscape;
         private BitmapFactory.Options mOptions;
@@ -109,20 +390,21 @@ public class PhotoTable extends Dream {
             super(dream, as);
             mDream = dream;
             mResources = getResources();
-            setBackgroundColor(mResources.getColor(R.color.tabletop));
+            setBackground(mResources.getDrawable(R.drawable.table));
             mInset = mResources.getDimensionPixelSize(R.dimen.photo_inset);
             mDropPeriod = mResources.getInteger(R.integer.drop_period);
             mImageRatio = mResources.getInteger(R.integer.image_ratio) / 1000000f;
+            mTableRatio = mResources.getInteger(R.integer.table_ratio) / 1000000f;
+            mImageRotationLimit = (float) mResources.getInteger(R.integer.max_image_rotation);
             mTableCapacity = mResources.getInteger(R.integer.table_capacity);
+            mManualImageRotation = mResources.getBoolean(R.bool.enable_manual_image_rotation);
+            mTapToExit = mResources.getBoolean(R.bool.enable_tap_to_exit);
             mOnTable = new LinkedList<View>();
             mOptions = new BitmapFactory.Options();
             mOptions.inTempStorage = new byte[32768];
             mLocalSource = new LocalSource(getContext());
             mLauncher = new Launcher(this);
             mStarted = false;
-            final ViewConfiguration configuration = ViewConfiguration.get(getContext());
-            mTouchSlop = configuration.getScaledTouchSlop();
-            mTapTimeout = configuration.getTapTimeout();
         }
 
         public boolean hasSelection() {
@@ -186,7 +468,9 @@ public class PhotoTable extends Dream {
                     dropOnTable(getSelected());
                     clearSelection();
                 } else  {
-                    mDream.finish();
+                    if (mTapToExit) {
+                        mDream.finish();
+                    }
                 }
                 return true;
             }
@@ -352,13 +636,13 @@ public class PhotoTable extends Dream {
             int width = ((Integer) photo.getTag(R.id.photo_width));
             int height = ((Integer) photo.getTag(R.id.photo_height));
             photo.setRotation(-100.0f);
-            photo.setX(-width);
-            photo.setY(-height);
+            photo.setX(-mLongSide);
+            photo.setY(-mLongSide);
             dropOnTable(photo);
         }
 
         private void dropOnTable(final View photo) {
-            float angle = randfrange(-60, 60f);
+            float angle = randfrange(-mImageRotationLimit, mImageRotationLimit);
             PointF p = randInCenter((float) sRNG.nextGaussian(), (float) sRNG.nextGaussian(),
                                     mWidth, mHeight);
             float x = p.x;
@@ -371,8 +655,8 @@ public class PhotoTable extends Dream {
             float width = (float) ((Integer) photo.getTag(R.id.photo_width)).intValue();
             float height = (float) ((Integer) photo.getTag(R.id.photo_height)).intValue();
 
-            x -= width / 2f;
-            y -= height / 2f;
+            x -= mTableRatio * mLongSide / 2f;
+            y -= mTableRatio * mLongSide / 2f;
             log("fixed offset is " + x + ", " + y);
 
             float dx = x - x0;
@@ -386,12 +670,13 @@ public class PhotoTable extends Dream {
             // toss onto table
             photo.animate()
                     .withLayer()
-                    .scaleX(0.5f / mImageRatio)
-                    .scaleY(0.5f / mImageRatio)
+                    .scaleX(mTableRatio / mImageRatio)
+                    .scaleY(mTableRatio / mImageRatio)
                     .rotation(angle)
                     .x(x)
-                   .y(y)
+                    .y(y)
                     .setDuration(duration)
+                    .setInterpolator(new DecelerateInterpolator())
                     .withEndAction(new Runnable() {
                             @Override
                                 public void run() {
@@ -401,141 +686,7 @@ public class PhotoTable extends Dream {
                             }
                         });
 
-            photo.setOnTouchListener(new OnTouchListener() {
-                private static final int INVALID_POINTER = -1;
-                private static final int MAX_POINTER_COUNT = 10;
-                private float mInitialTouchX;
-                private float mInitialTouchY;
-                private float mInitialTouchA;
-                private long mInitialTouchTime;
-                private float mInitialTargetX;
-                private float mInitialTargetY;
-                private float mInitialTargetA;
-                private int mA = INVALID_POINTER;
-                private int mB = INVALID_POINTER;
-                private float[] pts = new float[MAX_POINTER_COUNT];
-
-                /** Get angle defined by first two touches, in degrees */
-                private float getAngle(View target, MotionEvent ev) {
-                    float alpha = 0f;
-                    int a = ev.findPointerIndex(mA);
-                    int b = ev.findPointerIndex(mB);
-                    if (a >=0 && b >=0) {
-                        alpha = (float) (Math.atan2(pts[2*a + 1] - pts[2*b + 1],
-                                                    pts[2*a] - pts[2*b]) *
-                                         180f / Math.PI);
-                    }
-                    return alpha;
-                }
-
-                private void resetTouch(View target) {
-                    mInitialTouchX = -1;
-                    mInitialTouchY = -1;
-                    mInitialTouchA = 0f;
-                    mInitialTargetX = (float) target.getX();
-                    mInitialTargetY = (float) target.getY();
-                    mInitialTargetA = (float) target.getRotation();
-                }
-
-                @Override
-                public boolean onTouch(View target, MotionEvent ev) {
-                    final int action = ev.getActionMasked();
-
-                    // compute raw coordinates
-                    for(int i = 0; i < 10 && i < ev.getPointerCount(); i++) {
-                        pts[i*2] = ev.getX(i);
-                        pts[i*2 + 1] = ev.getY(i);
-                    }
-                    target.getMatrix().mapPoints(pts);
-
-                    switch (action) {
-                    case MotionEvent.ACTION_DOWN:
-                        moveToBackOfQueue(target);
-                        mInitialTouchTime = ev.getEventTime();
-                        mA = ev.getPointerId(ev.getActionIndex());
-                        resetTouch(target);
-                        log("action down: " + mA + ", " + mB);
-                        break;
-
-                    case MotionEvent.ACTION_POINTER_DOWN:
-                        if (mB == INVALID_POINTER) {
-                            mB = ev.getPointerId(ev.getActionIndex());
-                            mInitialTouchA = getAngle(target, ev);
-                        }
-                        log("action pointer down: " + mA + ", " + mB);
-                        break;
-
-                    case MotionEvent.ACTION_POINTER_UP:
-                        if (mB == ev.getPointerId(ev.getActionIndex())) {
-                            mB = INVALID_POINTER;
-                            mInitialTargetA = (float) target.getRotation();
-                        }
-                        if (mA == ev.getPointerId(ev.getActionIndex())) {
-                            mA = mB;
-                            resetTouch(target);
-                            mB = INVALID_POINTER;
-                        }
-                        log("action pointer up: " + mA + ", " + mB);
-                        break;
-
-                    case MotionEvent.ACTION_MOVE: {
-                            if (mA != INVALID_POINTER) {
-                                log("action move: " + mA + ", " + mB);
-                                int idx = ev.findPointerIndex(mA);
-                                float x = pts[2 * idx];
-                                float y = pts[2 * idx + 1];
-                                if (mInitialTouchX == -1 && mInitialTouchY == -1) {
-                                    mInitialTouchX = x;
-                                    mInitialTouchY = y;
-                                }
-                                if (getSelected() != target) {
-                                    target.animate().cancel();
-
-                                    target.setX((int) (mInitialTargetX + x - mInitialTouchX));
-                                    target.setY((int) (mInitialTargetY + y - mInitialTouchY));
-                                    if (mB != INVALID_POINTER) {
-                                        float a = getAngle(target, ev);
-                                        target.setRotation(
-                                                (int) (mInitialTargetA + a - mInitialTouchA));
-                                    }
-                                }
-                            }
-                        }
-                        break;
-
-                    case MotionEvent.ACTION_UP: {
-                            if (mA != INVALID_POINTER) {
-                                int idx = ev.findPointerIndex(mA);
-                                float x = pts[2 * idx];
-                                float y = pts[2 * idx + 1];
-                                if (mInitialTouchX == -1 && mInitialTouchY == -1) {
-                                    mInitialTouchX = x;
-                                    mInitialTouchY = y;
-                                }
-                                double distance = Math.hypot(x - mInitialTouchX,
-                                                             y - mInitialTouchY);
-                                if (getSelected() == target) {
-                                    dropOnTable(target);
-                                    clearSelection();
-                                } else if ((ev.getEventTime() - mInitialTouchTime) < mTapTimeout &&
-                                           distance < mTouchSlop) {
-                                    // tap
-                                    target.animate().cancel();
-                                setSelection(target);
-                                }
-                                mA = INVALID_POINTER;
-                                mB = INVALID_POINTER;
-                                log("action up: " + mA + ", " + mB);
-                            }
-                        }
-                        break;
-
-                    case MotionEvent.ACTION_CANCEL:
-                        break;
-                    }
-                    return true;
-                }
-            });
+            photo.setOnTouchListener(new PhotoTouchListener(getContext(), this));
         }
 
         /** wrap all orientations to the interval [-180, 180). */