Fixes a bug where scaling would not be performed.

Had to add an additional case to the page transform
that handles the new issue where the just disappeared
view is actually behind the screen but still getting
touch events. Victory.

Change-Id: Ifb760fd7d7510fec37c4101d448dbc980575b1be

1 files changed, 10 insertions, 1 deletions

diff --git a/photoviewer/src/com/android/ex/photo/PhotoViewPager.java b/photoviewer/src/com/android/ex/photo/PhotoViewPager.java
index 5945239..65d1d6d 100644
--- a/photoviewer/src/com/android/ex/photo/PhotoViewPager.java
+++ b/photoviewer/src/com/android/ex/photo/PhotoViewPager.java
@@ -78,7 +78,16 @@ public class PhotoViewPager extends ViewPager {
         setPageTransformer(true, new PageTransformer() {
             @Override
             public void transformPage(View page, float position) {
-                if (position < 0) {
+
+                // The >= 1 is needed so that the page
+                // (page A) that transitions behind the newly visible
+                // page (page B) that comes in from the left does not
+                // get the touch events because it is still on screen
+                // (page A is still technically on screen despite being
+                // invisible). This makes sure that when the transition
+                // has completely finished, we revert it to its default
+                // behavior and move it off of the screen.
+                if (position < 0 || position >= 1.f) {
                     page.setTranslationX(0);
                     page.setAlpha(1.f);
                     page.setScaleX(1);