From 53f8ba97dfe56b404fe9c6f630e8979af2072bf9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tomasz=20Czaj=C4=99cki?= <tomek.czajecki@gmail.com>
Date: Tue, 30 Jul 2019 15:05:05 +0200
Subject: [PATCH] =?UTF-8?q?fix:=20change=20single=20param=20to=20props=20o?=
 =?UTF-8?q?bject=20in=20onTransition=20callba=E2=80=A6=20(#171)?=
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---
 packages/stack/src/types.tsx             | 8 ++++++--
 packages/stack/src/views/Stack/Stack.tsx | 4 ++--
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/packages/stack/src/types.tsx b/packages/stack/src/types.tsx
index eb6978982ddbe7..7e5ddec665ef48 100644
--- a/packages/stack/src/types.tsx
+++ b/packages/stack/src/types.tsx
@@ -93,6 +93,10 @@ export type HeaderProps = {
   styleInterpolator: HeaderStyleInterpolator;
 };
 
+export type TransitionCallbackProps = {
+  closing: boolean;
+};
+
 export type NavigationStackOptions = HeaderOptions &
   Partial<TransitionPreset> & {
     title?: string;
@@ -107,8 +111,8 @@ export type NavigationStackOptions = HeaderOptions &
       vertical?: number;
       horizontal?: number;
     };
-    onTransitionStart?: (closing: boolean) => void;
-    onTransitionEnd?: (closing: boolean) => void;
+    onTransitionStart?: (props: TransitionCallbackProps) => void;
+    onTransitionEnd?: (props: TransitionCallbackProps) => void;
   };
 
 export type NavigationStackConfig = {
diff --git a/packages/stack/src/views/Stack/Stack.tsx b/packages/stack/src/views/Stack/Stack.tsx
index 8e64cebc0f0729..820e243c19833a 100755
--- a/packages/stack/src/views/Stack/Stack.tsx
+++ b/packages/stack/src/views/Stack/Stack.tsx
@@ -263,7 +263,7 @@ export default class Stack extends React.Component<Props, State> {
 
     descriptor &&
       descriptor.options.onTransitionStart &&
-      descriptor.options.onTransitionStart(closing);
+      descriptor.options.onTransitionStart({ closing });
   };
 
   private handleTransitionEnd = (
@@ -274,7 +274,7 @@ export default class Stack extends React.Component<Props, State> {
 
     descriptor &&
       descriptor.options.onTransitionEnd &&
-      descriptor.options.onTransitionEnd(closing);
+      descriptor.options.onTransitionEnd({ closing });
   };
 
   render() {