From 814b0cc3b6b52c462ebeb5fbb4c56a090479b7b3 Mon Sep 17 00:00:00 2001
From: tibbi <tibor@kaputa.sk>
Date: Mon, 20 Feb 2017 23:19:03 +0100
Subject: [PATCH] check if we are trying to rotate a photo fragment

---
 .../gallery/activities/ViewPagerActivity.kt            | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/app/src/main/kotlin/com/simplemobiletools/gallery/activities/ViewPagerActivity.kt b/app/src/main/kotlin/com/simplemobiletools/gallery/activities/ViewPagerActivity.kt
index 53463c55a..34a1abb0b 100644
--- a/app/src/main/kotlin/com/simplemobiletools/gallery/activities/ViewPagerActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/gallery/activities/ViewPagerActivity.kt
@@ -218,11 +218,17 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
 
     private fun rotateImage(degrees: Float) {
         mRotationDegrees = (mRotationDegrees + degrees) % 360
-        getCurrentFragment().rotateImageViewBy(mRotationDegrees)
+        getCurrentFragment()?.rotateImageViewBy(mRotationDegrees)
         supportInvalidateOptionsMenu()
     }
 
-    private fun getCurrentFragment() = ((view_pager.adapter as MyPagerAdapter).getCurrentFragment(view_pager.currentItem) as PhotoFragment)
+    private fun getCurrentFragment(): PhotoFragment? {
+        val fragment = (view_pager.adapter as MyPagerAdapter).getCurrentFragment(view_pager.currentItem)
+        return if (fragment is PhotoFragment)
+            fragment
+        else
+            null
+    }
 
     private fun showProperties() {
         if (getCurrentMedium() != null)