diff --git a/Example/ViewController.swift b/Example/ViewController.swift
index e885324..986538b 100644
--- a/Example/ViewController.swift
+++ b/Example/ViewController.swift
@@ -140,8 +140,8 @@ class ContainerView: UIView, PagerTab {
   init(frame: CGRect, tabsView: TabsView) {
     tabsView.frame = CGRect(x: 0, y: 0, width: frame.width, height: tabsView.frame.height)
     self.tabsView = tabsView
-    self.onSelectedTabChanging = { oldTab, newTab in
-      tabsView.onSelectedTabChanging(oldTab, newTab)
+    self.onSelectedTabChanging = { oldTab, newTab, origin in
+      tabsView.onSelectedTabChanging(oldTab, newTab, origin)
     }
     super.init(frame: frame)
     addSubview(tabsView)
@@ -163,7 +163,7 @@ class ContainerView: UIView, PagerTab {
     self.frame = CGRect(x: frame.minX, y: frame.minY, width: frame.width, height: tabsView.frame.height + 50)
   }
 
-  var onSelectedTabChanging: (Int, Int) -> Void = { _, _ in } {
+  var onSelectedTabChanging: (Int, Int, TabChangeOrigin) -> Void = { _, _, _ in } {
     didSet {
       tabsView.onSelectedTabChanging = onSelectedTabChanging
     }
diff --git a/Sources/PagerViewController.swift b/Sources/PagerViewController.swift
index a77b447..19432f9 100644
--- a/Sources/PagerViewController.swift
+++ b/Sources/PagerViewController.swift
@@ -144,7 +144,7 @@ public final class PagerView: UIView {
 
     // Setup TabsView.
     if tabsView != nil {
-      tabsView!.onSelectedTabChanging = { [weak self] newIndex, oldIndex in
+      tabsView!.onSelectedTabChanging = { [weak self] newIndex, oldIndex, _ in
         self?.didSelectTabAtIndex(index: newIndex, previouslySelected: oldIndex, animated: true)
       }
       addSubview(tabsView!)
diff --git a/Sources/ParallaxPagerView.swift b/Sources/ParallaxPagerView.swift
index 532f0bf..7401a51 100644
--- a/Sources/ParallaxPagerView.swift
+++ b/Sources/ParallaxPagerView.swift
@@ -306,7 +306,7 @@ public final class ParallaxPagerView: UIView {
 
     // Setup TabsView.
     if tabsView != nil {
-      tabsView!.onSelectedTabChanging = { [weak self] newIndex, oldIndex in
+      tabsView!.onSelectedTabChanging = { [weak self] newIndex, oldIndex, _ in
         self?.didSelectTabAtIndex(index: newIndex, previouslySelected: oldIndex, animated: true)
       }
       addSubview(tabsView!)
diff --git a/Sources/Protocols.swift b/Sources/Protocols.swift
index b10955a..00fea47 100644
--- a/Sources/Protocols.swift
+++ b/Sources/Protocols.swift
@@ -24,7 +24,7 @@ public protocol PagerDelegate {
 }
 
 public protocol PagerTab {
-  var onSelectedTabChanging: (_ oldTab: Int, _ newTab: Int) -> Void { set get }
+  var onSelectedTabChanging: (_ oldTab: Int, _ newTab: Int, _ origin: TabChangeOrigin) -> Void { set get }
   func currentSelectedIndex() -> Int
   func numberOfTabs() -> Int
   func setSelectedTab(at index: Int)
diff --git a/Sources/Tabs/TabsView.swift b/Sources/Tabs/TabsView.swift
index caa37ce..a5ef89a 100644
--- a/Sources/Tabs/TabsView.swift
+++ b/Sources/Tabs/TabsView.swift
@@ -50,7 +50,7 @@ fileprivate class TabView: UIView {
   }
 
   @objc private func tabClicked() {
-    tabsView.clickedTab(at: index)
+    tabsView.clickedTab(at: index, origin: .click)
   }
 
   required init?(coder aDecoder: NSCoder) {
@@ -58,9 +58,14 @@ fileprivate class TabView: UIView {
   }
 }
 
+public enum TabChangeOrigin {
+  case click
+  case other
+}
+
 public class TabsView: UIView {
 
-  public var onSelectedTabChanging: (_ oldTab: Int, _ newTab: Int) -> Void = { _, _ in }
+  public var onSelectedTabChanging: (_ oldTab: Int, _ newTab: Int, _ origin: TabChangeOrigin) -> Void = { _, _,_  in }
 
   @IBOutlet fileprivate weak var scrollView: UIScrollView!
   @IBOutlet fileprivate weak var scrollViewWidthConstraint: NSLayoutConstraint!
@@ -179,9 +184,9 @@ public class TabsView: UIView {
     }
   }
 
-  fileprivate func clickedTab(at index: Int) {
+  fileprivate func clickedTab(at index: Int, origin: TabChangeOrigin) {
     if index == selectedIndex { return }
-    onSelectedTabChanging(index, selectedIndex)
+    onSelectedTabChanging(index, selectedIndex, origin)
     selectedIndex = index
     let selectedTab = tabsList[index]
 
@@ -196,9 +201,9 @@ public class TabsView: UIView {
     }
   }
 
-  func setSelected(index: Int) {
+  func setSelected(index: Int, origin: TabChangeOrigin) {
     guard index >= 0, index < tabsList.count else { return }
-    clickedTab(at: index)
+    clickedTab(at: index, origin: origin)
   }
 }
 
@@ -213,7 +218,7 @@ extension TabsView: PagerTab {
   }
 
   public func setSelectedTab(at index: Int) {
-    setSelected(index: index)
+    setSelected(index: index, origin: .other)
   }
 }