From c788aef4aac1f66fcad94d38363619e78151a6f8 Mon Sep 17 00:00:00 2001
From: tibbi <tibor@kaputa.sk>
Date: Wed, 28 Feb 2018 12:11:56 +0100
Subject: [PATCH] add a helper extension for listening to viewpager page
 changes

---
 build.gradle                                     |  2 +-
 .../commons/extensions/ViewPager.kt              | 16 ++++++++++++++++
 2 files changed, 17 insertions(+), 1 deletion(-)
 create mode 100644 commons/src/main/kotlin/com/simplemobiletools/commons/extensions/ViewPager.kt

diff --git a/build.gradle b/build.gradle
index 5f84850dd..0e7774729 100644
--- a/build.gradle
+++ b/build.gradle
@@ -6,7 +6,7 @@ buildscript {
         propMinSdkVersion = 16
         propTargetSdkVersion = propCompileSdkVersion
         propVersionCode = 1
-        propVersionName = '3.13.19'
+        propVersionName = '3.13.20'
         kotlin_version = '1.2.21'
         support_libs = '27.0.2'
     }
diff --git a/commons/src/main/kotlin/com/simplemobiletools/commons/extensions/ViewPager.kt b/commons/src/main/kotlin/com/simplemobiletools/commons/extensions/ViewPager.kt
new file mode 100644
index 000000000..3239a1dd4
--- /dev/null
+++ b/commons/src/main/kotlin/com/simplemobiletools/commons/extensions/ViewPager.kt
@@ -0,0 +1,16 @@
+package com.simplemobiletools.commons.extensions
+
+import android.support.v4.view.ViewPager
+
+fun ViewPager.onPageChangeListener(pageChangedAction: (newPosition: Int) -> Unit) =
+        addOnPageChangeListener(object : ViewPager.OnPageChangeListener {
+            override fun onPageScrollStateChanged(state: Int) {
+            }
+
+            override fun onPageScrolled(position: Int, positionOffset: Float, positionOffsetPixels: Int) {
+            }
+
+            override fun onPageSelected(position: Int) {
+                pageChangedAction(position)
+            }
+        })