Improved tab hiding by following header animation

App.js

@@ -62,7 +62,7 @@ export default class App extends React.Component<Props, State> {
         this.defaultData = {};
         this.urlHandler = new URLHandler(this.onInitialURLParsed, this.onDetectURL);
         this.urlHandler.listen();
-        setSafeBounceHeight(Platform.OS === 'ios' ? 100 : 0);
+        setSafeBounceHeight(Platform.OS === 'ios' ? 100 : 20);
     }
 
     onInitialURLParsed = ({route, data}: Object) => {

src/components/Lists/WebSectionList.js

@@ -9,7 +9,6 @@ import ErrorView from "../Custom/ErrorView";
 import BasicLoadingScreen from "../Custom/BasicLoadingScreen";
 import {withCollapsible} from "../../utils/withCollapsible";
 import * as Animatable from 'react-native-animatable';
-import AutoHideHandler from "../../utils/AutoHideHandler";
 import CustomTabBar from "../Tabbar/CustomTabBar";
 
 type Props = {
@@ -52,9 +51,9 @@ class WebSectionList extends React.PureComponent<Props, State> {
         itemHeight: null,
     };
 
+    scrollRef: Object;
     refreshInterval: IntervalID;
     lastRefresh: Date;
-    hideHandler: AutoHideHandler;
 
     state = {
         refreshing: false,
@@ -75,8 +74,6 @@ class WebSectionList extends React.PureComponent<Props, State> {
         this.onFetchSuccess = this.onFetchSuccess.bind(this);
         this.onFetchError = this.onFetchError.bind(this);
         this.getEmptySectionHeader = this.getEmptySectionHeader.bind(this);
-        this.hideHandler = new AutoHideHandler(false);
-        this.hideHandler.addListener(this.onHideChange);
     }
 
     /**
@@ -88,6 +85,7 @@ class WebSectionList extends React.PureComponent<Props, State> {
         const onScreenBlur = this.onScreenBlur.bind(this);
         this.props.navigation.addListener('focus', onScreenFocus);
         this.props.navigation.addListener('blur', onScreenBlur);
+        this.scrollRef = React.createRef();
         this.onRefresh();
     }
 
@@ -99,6 +97,8 @@ class WebSectionList extends React.PureComponent<Props, State> {
             this.onRefresh();
         if (this.props.autoRefreshTime > 0)
             this.refreshInterval = setInterval(this.onRefresh, this.props.autoRefreshTime)
+        // if (this.scrollRef.current) // Reset scroll to top
+        //     this.scrollRef.current.getNode().scrollToLocation({animated:false, itemIndex:0, sectionIndex:0});
     }
 
     /**
@@ -205,15 +205,10 @@ class WebSectionList extends React.PureComponent<Props, State> {
     }
 
     onScroll = (event: Object) => {
-        this.hideHandler.onScroll(event);
         if (this.props.onScroll)
             this.props.onScroll(event);
     }
 
-    onHideChange = (shouldHide: boolean) => {
-        this.props.navigation.setParams({hideTabBar: shouldHide});
-    }
-
     render() {
         let dataset = [];
         if (this.state.fetchedData !== undefined)
@@ -224,6 +219,7 @@ class WebSectionList extends React.PureComponent<Props, State> {
             <View>
                 {/*$FlowFixMe*/}
                 <Animated.SectionList
+                    ref={this.scrollRef}
                     sections={dataset}
                     extraData={this.props.updateData}
                     refreshControl={

src/components/Screens/WebViewScreen.js

@@ -11,7 +11,6 @@ import {Linking} from "expo";
 import i18n from 'i18n-js';
 import {Animated, BackHandler} from "react-native";
 import {withCollapsible} from "../../utils/withCollapsible";
-import AutoHideHandler from "../../utils/AutoHideHandler";
 
 type Props = {
     navigation: Object,
@@ -34,7 +33,6 @@ class WebViewScreen extends React.PureComponent<Props> {
     };
 
     webviewRef: Object;
-    hideHandler: AutoHideHandler;
 
     canGoBack: boolean;
 
@@ -42,8 +40,6 @@ class WebViewScreen extends React.PureComponent<Props> {
         super();
         this.webviewRef = React.createRef();
         this.canGoBack = false;
-        this.hideHandler = new AutoHideHandler(false);
-        this.hideHandler.addListener(this.onHideChange);
     }
 
     /**
@@ -136,15 +132,10 @@ class WebViewScreen extends React.PureComponent<Props> {
     }
 
     onScroll = (event: Object) => {
-        this.hideHandler.onScroll(event);
         if (this.props.onScroll)
             this.props.onScroll(event);
     }
 
-    onHideChange = (shouldHide: boolean) => {
-        this.props.navigation.setParams({hideTabBar: shouldHide});
-    }
-
     render() {
         const {containerPaddingTop, onScrollWithListener} = this.props.collapsibleStack;
         return (

src/components/Tabbar/CustomTabBar.js

@@ -2,33 +2,45 @@ import * as React from 'react';
 import {withTheme} from 'react-native-paper';
 import TabIcon from "./TabIcon";
 import TabHomeIcon from "./TabHomeIcon";
-import * as Animatable from 'react-native-animatable';
+import {AnimatedValue} from "react-native-reanimated";
+import {Animated} from 'react-native';
 
 type Props = {
     state: Object,
     descriptors: Object,
     navigation: Object,
     theme: Object,
+    collapsibleStack: Object,
+}
+
+type State = {
+    translateY: AnimatedValue,
 }
 
 /**
  * Abstraction layer for Agenda component, using custom configuration
  */
-class CustomTabBar extends React.Component<Props> {
+class CustomTabBar extends React.Component<Props, State> {
 
     static TAB_BAR_HEIGHT = 48;
 
+    barSynced: boolean; // Is the bar synced with the header for animations?
+
+    state = {
+        translateY: new Animated.Value(0),
+    }
+
     // shouldComponentUpdate(nextProps: Props): boolean {
     //     return (nextProps.theme.dark !== this.props.theme.dark)
     //         || (nextProps.state.index !== this.props.state.index);
     // }
 
-    isHidden: boolean;
     tabRef: Object;
 
     constructor() {
         super();
         this.tabRef = React.createRef();
+        this.barSynced = false;
     }
 
     onItemPress(route: Object, currentIndex: number, destIndex: number) {
@@ -38,6 +50,7 @@ class CustomTabBar extends React.Component<Props> {
             canPreventDefault: true,
         });
         if (currentIndex !== destIndex && !event.defaultPrevented) {
+            this.state.translateY = new Animated.Value(0);
             this.props.navigation.navigate(route.name, {
                 screen: 'index',
                 params: {animationDir: currentIndex < destIndex ? "right" : "left"}
@@ -45,16 +58,21 @@ class CustomTabBar extends React.Component<Props> {
         }
     }
 
+    onRouteChange = () => {
+        this.barSynced = false;
+    }
+
     render() {
         const state = this.props.state;
         const descriptors = this.props.descriptors;
         const navigation = this.props.navigation;
+        this.props.navigation.addListener('state', this.onRouteChange);
         return (
-            <Animatable.View
+            <Animated.View
                 ref={this.tabRef}
-                animation={"fadeInUp"}
+                // animation={"fadeInUp"}
-                duration={500}
+                // duration={500}
-                useNativeDriver
+                // useNativeDriver
                 style={{
                     flexDirection: 'row',
                     height: CustomTabBar.TAB_BAR_HEIGHT,
@@ -63,6 +81,7 @@ class CustomTabBar extends React.Component<Props> {
                     bottom: 0,
                     left: 0,
                     backgroundColor: this.props.theme.colors.surface,
+                    transform: [{translateY: this.state.translateY}]
                 }}
             >
                 {state.routes.map((route, index) => {
@@ -85,18 +104,14 @@ class CustomTabBar extends React.Component<Props> {
                         });
                     };
                     if (isFocused) {
-                        const tabVisible = options.tabBarVisible();
+                        const stackState = route.state;
-                        console.log(tabVisible);
+                        const stackRoute = route.state ? stackState.routes[stackState.index] : undefined;
-                        if (this.tabRef.current) {
+                        const params = stackRoute ? stackRoute.params : undefined;
-                            if (this.isHidden && tabVisible) {
+                        const collapsible = params ? params.collapsible : undefined;
-                                this.isHidden = false;
+                        if (collapsible && !this.barSynced) {
-                                this.tabRef.current.slideInUp(300);
+                            this.barSynced = true;
-                            } else if (!this.isHidden && !tabVisible){
+                            this.setState({translateY: Animated.multiply(-1.5, collapsible.translateY)});
-                                this.isHidden = true;
-                                this.tabRef.current.slideOutDown(300);
-                            }
                         }
-
                     }
 
                     const color = isFocused ? options.activeColor : options.inactiveColor;
@@ -120,7 +135,7 @@ class CustomTabBar extends React.Component<Props> {
                             key={route.key}
                         />
                 })}
-            </Animatable.View>
+            </Animated.View>
         );
     }
 }

src/navigation/MainTabNavigator.js

@@ -343,15 +343,6 @@ class TabNavigator extends React.Component<Props> {
                         else
                             return null;
                     },
-                    tabBarVisible: () => {
-                        const state = route.state;
-                        // Get the current route in the stack
-                        const screen = state ? state.routes[state.index] : undefined;
-                        const params = screen ? screen.params : undefined;
-                        const hideTabBar = params ? params.hideTabBar : undefined;
-                        return hideTabBar !== undefined ? !hideTabBar : true;
-                    },
-                    animationEnabled: true,
                     tabBarLabel: route.name !== 'home' ? undefined : '',
                     activeColor: this.props.theme.colors.primary,
                     inactiveColor: this.props.theme.colors.tabIcon,