forked from vergnet/application-amicale
Improved tab bar hiding logic
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f9efea288f
commit
a9caca9969
1 changed files with 59 additions and 30 deletions
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@ -3,6 +3,7 @@ import {withTheme} from 'react-native-paper';
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import TabIcon from "./TabIcon";
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import TabHomeIcon from "./TabHomeIcon";
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import {Animated} from 'react-native';
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import {Collapsible} from "react-navigation-collapsible";
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type Props = {
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state: Object,
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@ -24,41 +25,69 @@ const TAB_ICONS = {
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planex: 'clock',
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};
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/**
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* Abstraction layer for Agenda component, using custom configuration
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*/
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class CustomTabBar extends React.Component<Props, State> {
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static TAB_BAR_HEIGHT = 48;
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state = {
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translateY: new Animated.Value(0),
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barSynced: false,// Is the bar synced with the header for animations?
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}
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syncTabBar = (route, index) => {
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const state = this.props.state;
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const isFocused = state.index === index;
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if (isFocused) {
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const stackState = route.state;
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const stackRoute = stackState ? stackState.routes[stackState.index] : undefined;
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const params: { collapsible: Collapsible } = stackRoute ? stackRoute.params : undefined;
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const collapsible = params ? params.collapsible : undefined;
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if (collapsible) {
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this.setState({
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translateY: Animated.multiply(-1.5, collapsible.translateY), // Hide tab bar faster than header bar
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});
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}
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}
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};
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/**
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* Navigates to the given route if it is different from the current one
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*
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* @param route Destination route
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* @param currentIndex The current route index
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* @param destIndex The destination route index
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*/
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onItemPress(route: Object, currentIndex: number, destIndex: number) {
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const event = this.props.navigation.emit({
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type: 'tabPress',
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target: route.key,
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canPreventDefault: true,
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});
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if (currentIndex !== destIndex && !event.defaultPrevented) {
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this.state.translateY = new Animated.Value(0);
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if (currentIndex !== destIndex && !event.defaultPrevented)
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this.props.navigation.navigate(route.name);
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}
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}
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/**
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* Navigates to tetris screen on home button long press
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*
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* @param route
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*/
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onItemLongPress(route: Object) {
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const event = this.props.navigation.emit({
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type: 'tabLongPress',
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target: route.key,
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canPreventDefault: true,
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});
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if (route.name === "home" && !event.defaultPrevented) {
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if (route.name === "home" && !event.defaultPrevented)
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this.props.navigation.navigate('tetris');
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}
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}
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/**
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* Gets an icon for the given route if it is not the home one as it uses a custom button
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*
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* @param route
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* @param focused
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* @returns {null}
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*/
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tabBarIcon = (route, focused) => {
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let icon = TAB_ICONS[route.name];
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icon = focused ? icon : icon + ('-outline');
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@ -68,39 +97,34 @@ class CustomTabBar extends React.Component<Props, State> {
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return null;
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};
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/**
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* Finds the active route and syncs the tab bar animation with the header bar
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*/
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onRouteChange = () => {
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this.setState({barSynced: false});
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this.props.state.routes.map(this.syncTabBar)
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}
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/**
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* Gets a tab icon render.
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* If the given route is focused, it syncs the tab bar and header bar animations together
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*
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* @param route The route for the icon
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* @param index The index of the current route
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* @returns {*}
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*/
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renderIcon = (route, index) => {
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const state = this.props.state;
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const {options} = this.props.descriptors[route.key];
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const label =
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options.tabBarLabel !== undefined
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options.tabBarLabel != null
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? options.tabBarLabel
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: options.title !== undefined
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: options.title != null
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? options.title
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: route.name;
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const isFocused = state.index === index;
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const onPress = () => this.onItemPress(route, state.index, index);
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const onLongPress = () => this.onItemLongPress(route);
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if (isFocused) {
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const stackState = route.state;
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const stackRoute = route.state ? stackState.routes[stackState.index] : undefined;
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const params = stackRoute ? stackRoute.params : undefined;
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const collapsible = params ? params.collapsible : undefined;
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if (collapsible && !this.state.barSynced) {
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this.setState({
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translateY: Animated.multiply(-1.5, collapsible.translateY),
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barSynced: true,
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});
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}
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}
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const isFocused = state.index === index;
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const color = isFocused ? this.props.theme.colors.primary : this.props.theme.colors.tabIcon;
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if (route.name !== "home") {
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@ -124,8 +148,13 @@ class CustomTabBar extends React.Component<Props, State> {
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/>
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};
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getIcons() {
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return this.props.state.routes.map(this.renderIcon);
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}
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render() {
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this.props.navigation.addListener('state', this.onRouteChange);
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const icons = this.getIcons();
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return (
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<Animated.View
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useNativeDriver
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@ -140,7 +169,7 @@ class CustomTabBar extends React.Component<Props, State> {
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transform: [{translateY: this.state.translateY}],
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}}
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>
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{this.props.state.routes.map(this.renderIcon)}
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{icons}
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</Animated.View>
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);
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}
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