Added flow-type to the Native Component

Added missing flow type for native component to document.

Libraries/Components/ViewPager/AndroidViewPagerNativeComponent.js

@@ -5,11 +5,103 @@
  * LICENSE file in the root directory of this source tree.
  *
  * @format
- * @flow strict-local
+ * @flow
  */
 
 'use strict';
 
+const React = require('React');
+const ReactNative = require('ReactNative');
 const requireNativeComponent = require('requireNativeComponent');
 
-module.exports = requireNativeComponent('AndroidViewPager');
+import type {SyntheticEvent} from 'CoreEventTypes';
+import type {NativeComponent} from 'ReactNative';
+import type {ViewStyleProp} from 'StyleSheet';
+
+type PageScrollState = 'idle' | 'dragging' | 'settling';
+
+type PageScrollEvent = SyntheticEvent<
+ $ReadOnly<{|
+ position: number,
+ offset: number,
+ |}>,
+>;
+
+type PageSelectedEvent = SyntheticEvent<
+ $ReadOnly<{|
+ position: number,
+ |}>,
+>;
+
+type NativeProps = $ReadOnly<{|
+ /**
+ * Index of initial page that should be selected. Use `setPage` method to
+ * update the page, and `onPageSelected` to monitor page changes
+ */
+ initialPage?: ?number,
+
+ /**
+ * Executed when transitioning between pages (ether because of animation for
+ * the requested page change or when user is swiping/dragging between pages)
+ * The `event.nativeEvent` object for this callback will carry following data:
+ * - position - index of first page from the left that is currently visible
+ * - offset - value from range [0,1) describing stage between page transitions.
+ * Value x means that (1 - x) fraction of the page at "position" index is
+ * visible, and x fraction of the next page is visible.
+ */
+ onPageScroll?: ?(e: PageScrollEvent) => void,
+
+ /**
+ * Function called when the page scrolling state has changed.
+ * The page scrolling state can be in 3 states:
+ * - idle, meaning there is no interaction with the page scroller happening at the time
+ * - dragging, meaning there is currently an interaction with the page scroller
+ * - settling, meaning that there was an interaction with the page scroller, and the
+ * page scroller is now finishing it's closing or opening animation
+ */
+ onPageScrollStateChanged?: ?(e: PageScrollState) => void,
+
+ /**
+ * This callback will be called once ViewPager finish navigating to selected page
+ * (when user swipes between pages). The `event.nativeEvent` object passed to this
+ * callback will have following fields:
+ * - position - index of page that has been selected
+ */
+ onPageSelected?: ?(e: PageSelectedEvent) => void,
+
+ /**
+ * Blank space to show between pages. This is only visible while scrolling, pages are still
+ * edge-to-edge.
+ */
+ pageMargin?: ?number,
+
+ /**
+ * Whether enable showing peekFraction or not. If this is true, the preview of
+ * last and next page will show in current screen. Defaults to false.
+ */
+
+ peekEnabled?: ?boolean,
+
+ /**
+ * Determines whether the keyboard gets dismissed in response to a drag.
+ * - 'none' (the default), drags do not dismiss the keyboard.
+ * - 'on-drag', the keyboard is dismissed when a drag begins.
+ */
+ keyboardDismissMode?: ?('none' | 'on-drag'),
+
+ /**
+ * When false, the content does not scroll.
+ * The default value is true.
+ */
+ scrollEnabled?: ?boolean,
+
+ children?: React.Node,
+
+ style?: ?ViewStyleProp,
+|}>;
+
+type ViewPagerNativeType = Class<ReactNative.NativeComponent<NativeProps>>;
+
+module.exports = ((requireNativeComponent(
+ 'AndroidViewPager',
+): any): ViewPagerNativeType);