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Each\n * child view of the `ViewPager` will be treated as a separate page\n * and will be stretched to fill the `ViewPager`.\n *\n * It is important all children are `<View>`s and not composite components.\n * You can set style properties like `padding` or `backgroundColor` for each\n * child. It is also important that each child have a `key` prop.\n *\n * Example:\n *\n * ```\n * render: function() {\n * return (\n * <ViewPager\n * style={styles.viewPager}\n * initialPage={0}>\n * <View style={styles.pageStyle} key=\"1\">\n * <Text>First page</Text>\n * </View>\n * <View style={styles.pageStyle} key=\"2\">\n * <Text>Second page</Text>\n * </View>\n * </ViewPager>\n * );\n * }\n *\n * ...\n *\n * var styles = {\n * ...\n * viewPager: {\n * flex: 1\n * },\n * pageStyle: {\n * alignItems: 'center',\n * padding: 20,\n * }\n * }\n * ```\n */\n\nexport class ViewPager extends React.Component<ViewPagerProps> {\n private isScrolling = false;\n private viewPager = React.createRef<typeof ViewpagerViewManager>();\n\n componentDidMount() {\n // On iOS we do it directly on the native side\n if (Platform.OS === 'android') {\n if (this.props.initialPage != null) {\n this.setPageWithoutAnimation(this.props.initialPage);\n }\n }\n }\n\n public getInnerViewNode = (): ReactElement => {\n return this.viewPager.current!.getInnerViewNode();\n };\n\n private _onPageScroll = (e: ViewPagerOnPageScrollEvent) => {\n if (this.props.onPageScroll) {\n this.props.onPageScroll(e);\n }\n // Not implemented on iOS yet\n if (Platform.OS === 'android') {\n if (this.props.keyboardDismissMode === 'on-drag') {\n Keyboard.dismiss();\n }\n }\n };\n\n private _onPageScrollStateChanged = (\n e: PageScrollStateChangedNativeEvent\n ) => {\n if (this.props.onPageScrollStateChanged) {\n this.props.onPageScrollStateChanged(e);\n }\n this.isScrolling = e.nativeEvent.pageScrollState === 'dragging';\n };\n\n private _onPageSelected = (e: ViewPagerOnPageSelectedEvent) => {\n if (this.props.onPageSelected) {\n this.props.onPageSelected(e);\n }\n };\n\n /**\n * A helper function to scroll to a specific page in the ViewPager.\n * The transition between pages will be animated.\n */\n public setPage = (selectedPage: number) => {\n UIManager.dispatchViewManagerCommand(\n ReactNative.findNodeHandle(this),\n getViewManagerConfig().Commands.setPage,\n [selectedPage]\n );\n };\n\n /**\n * A helper function to scroll to a specific page in the ViewPager.\n * The transition between pages will *not* be animated.\n */\n public setPageWithoutAnimation = (selectedPage: number) => {\n UIManager.dispatchViewManagerCommand(\n ReactNative.findNodeHandle(this),\n getViewManagerConfig().Commands.setPageWithoutAnimation,\n [selectedPage]\n );\n };\n\n /**\n * A helper function to enable/disable scroll imperatively\n * The recommended way is using the scrollEnabled prop, however, there might be a case where a\n * imperative solution is more useful (e.g. for not blocking an animation)\n */\n public setScrollEnabled = (scrollEnabled: boolean) => {\n UIManager.dispatchViewManagerCommand(\n ReactNative.findNodeHandle(this),\n getViewManagerConfig().Commands.setScrollEnabled,\n [scrollEnabled]\n );\n };\n\n private _onMoveShouldSetResponderCapture = () => {\n return this.isScrolling;\n };\n\n render() {\n return (\n <ViewpagerViewManager\n {...this.props}\n ref={this.viewPager as any /** TODO: Fix ref type */}\n style={this.props.style}\n onPageScroll={this._onPageScroll}\n onPageScrollStateChanged={this._onPageScrollStateChanged}\n onPageSelected={this._onPageSelected}\n onMoveShouldSetResponderCapture={this._onMoveShouldSetResponderCapture}\n children={childrenWithOverriddenStyle(this.props.children)}\n />\n );\n }\n}\n"]} |