From a23b53f496e75771e6ed2ac5dfcac1ff0d826c7f Mon Sep 17 00:00:00 2001
From: Krzysztof Bielicki <krzysztof.bielicki@allegro.pl>
Date: Mon, 17 Feb 2014 11:45:30 +0100
Subject: [PATCH] Added canScrollVertically, canScrollHorizontally to behave
 properly in ViewPager

---
 .../library/imagezoom/ImageViewTouch.java     | 28 ++++++++++++++++++-
 1 file changed, 27 insertions(+), 1 deletion(-)

diff --git a/library/src/it/sephiroth/android/library/imagezoom/ImageViewTouch.java b/library/src/it/sephiroth/android/library/imagezoom/ImageViewTouch.java
index 750f936..9841560 100644
--- a/library/src/it/sephiroth/android/library/imagezoom/ImageViewTouch.java
+++ b/library/src/it/sephiroth/android/library/imagezoom/ImageViewTouch.java
@@ -176,6 +176,11 @@ public boolean onSingleTapUp( MotionEvent e ) {
 		return true;
 	}
 
+    @Override
+    public boolean canScrollHorizontally(int direction) {
+        return canScroll(-direction);
+    }
+
 	/**
 	 * Determines whether this ImageViewTouch can be scrolled.
 	 * 
@@ -205,7 +210,28 @@ public boolean canScroll( int direction ) {
 		return bitmapScrollRectDelta > SCROLL_DELTA_THRESHOLD;
 	}
 
-	public class GestureListener extends GestureDetector.SimpleOnGestureListener {
+    @Override
+    public boolean canScrollVertically(int direction) {
+        RectF bitmapRect = getBitmapRect();
+        updateRect( bitmapRect, mScrollRect );
+        Rect imageViewRect = new Rect();
+        getGlobalVisibleRect( imageViewRect );
+
+        if( null == bitmapRect ) {
+            return false;
+        }
+
+        if ( bitmapRect.bottom >= imageViewRect.bottom ) {
+            if ( direction < 0 ) {
+                return Math.abs( bitmapRect.bottom - imageViewRect.bottom ) > SCROLL_DELTA_THRESHOLD;
+            }
+        }
+
+        double bitmapScrollRectDelta = Math.abs( bitmapRect.top - mScrollRect.top );
+        return bitmapScrollRectDelta > SCROLL_DELTA_THRESHOLD;
+    }
+
+    public class GestureListener extends GestureDetector.SimpleOnGestureListener {
 
 		@Override
 		public boolean onSingleTapConfirmed( MotionEvent e ) {