1 files changed, 67 insertions, 0 deletions
diff --git a/sample/src/main/java/com/davemorrissey/labs/subscaleview/test/viewpager/VerticalViewPager.java b/sample/src/main/java/com/davemorrissey/labs/subscaleview/test/viewpager/VerticalViewPager.java
new file mode 100644
index 0000000..3d64042
--- /dev/null
+++ b/sample/src/main/java/com/davemorrissey/labs/subscaleview/test/viewpager/VerticalViewPager.java
@@ -0,0 +1,67 @@
+package com.davemorrissey.labs.subscaleview.test.viewpager;
+
+import android.content.Context;
+import android.support.v4.view.ViewPager;
+import android.util.AttributeSet;
+import android.view.MotionEvent;
+import android.view.View;
+
+/**
+ * From http://stackoverflow.com/a/22797619/2719186
+ */
+public class VerticalViewPager extends ViewPager {
+
+    public VerticalViewPager(Context context) {
+        super(context);
+        init();
+    }
+
+    public VerticalViewPager(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        init();
+    }
+
+    private void init() {
+        setPageTransformer(true, new VerticalPageTransformer());
+        setOverScrollMode(OVER_SCROLL_NEVER);
+    }
+
+    private class VerticalPageTransformer implements ViewPager.PageTransformer {
+
+        @Override
+        public void transformPage(View view, float position) {
+            if (position < -1) {
+                view.setAlpha(0);
+            } else if (position <= 1) {
+                view.setAlpha(1);
+                view.setTranslationX(view.getWidth() * -position);
+                float yPosition = position * view.getHeight();
+                view.setTranslationY(yPosition);
+            } else {
+                view.setAlpha(0);
+            }
+        }
+    }
+
+    private MotionEvent swapXY(MotionEvent ev) {
+        float width = getWidth();
+        float height = getHeight();
+        float newX = (ev.getY() / height) * width;
+        float newY = (ev.getX() / width) * height;
+        ev.setLocation(newX, newY);
+        return ev;
+    }
+
+    @Override
+    public boolean onInterceptTouchEvent(MotionEvent ev){
+        boolean intercepted = super.onInterceptTouchEvent(swapXY(ev));
+        swapXY(ev);
+        return intercepted;
+    }
+
+    @Override
+    public boolean onTouchEvent(MotionEvent ev) {
+        return super.onTouchEvent(swapXY(ev));
+    }
+
+}