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Add arrow key navigation support to VirtualizedList items #815

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Add arrow key navigation support to VirtualizedList items #815

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121 changes: 87 additions & 34 deletions NewArch/src/examples/VirtualizedListExamplePage.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -185,21 +185,59 @@ export const VirtualizedListExamplePage: React.FunctionComponent<{navigation?: a
const [getList, setList] = useState([]);

// Refs for focus management
const itemRefs = useRef({});
const itemRefs2 = useRef({});
const itemRefs3 = useRef({});
const itemRefs = useRef<{[key: number]: any}>({});
const itemRefs2 = useRef<{[key: number]: any}>({});
const itemRefs3 = useRef<{[key: number]: any}>({});

// Track focused index for arrow key navigation
const [focusedIndex1, setFocusedIndex1] = useState<number | null>(null);
const [focusedIndex2, setFocusedIndex2] = useState<number | null>(null);
const [focusedIndex3, setFocusedIndex3] = useState<number | null>(null);

const ITEM_COUNT = 50;

// Arrow key navigation handler factory
const createKeyDownHandler = (
focusedIndex: number | null,
setFocusedIndex: (index: number) => void,
refs: React.MutableRefObject<{[key: number]: any}>,
) => {
return (e: any, currentIndex: number) => {
if (e.nativeEvent.key === 'ArrowDown') {
e.preventDefault();
e.stopPropagation?.();
const nextIndex = Math.min(currentIndex + 1, ITEM_COUNT - 1);
if (refs.current[nextIndex]) {
refs.current[nextIndex].focus();
setFocusedIndex(nextIndex);
}
} else if (e.nativeEvent.key === 'ArrowUp') {
e.preventDefault();
e.stopPropagation?.();
const prevIndex = Math.max(currentIndex - 1, 0);
if (refs.current[prevIndex]) {
refs.current[prevIndex].focus();
setFocusedIndex(prevIndex);
}
}
};
};

// Focus management for renderItem2
const handleKeyDown1 = createKeyDownHandler(focusedIndex1, setFocusedIndex1, itemRefs);
const handleKeyDown2 = createKeyDownHandler(focusedIndex2, setFocusedIndex2, itemRefs2);
const handleKeyDown3 = createKeyDownHandler(focusedIndex3, setFocusedIndex3, itemRefs3);

// Focus management for renderItem2 - focus selected item after selection
useEffect(() => {
if (selectedIndex !== undefined && itemRefs.current[selectedIndex]) {
itemRefs.current[selectedIndex].focus();
if (selectedIndex !== undefined && itemRefs2.current[selectedIndex]) {
itemRefs2.current[selectedIndex].focus();
}
}, [selectedIndex]);

// Focus management for renderItem3 single selection
useEffect(() => {
if (selectedIndex2 !== undefined && itemRefs2.current[selectedIndex2]) {
itemRefs2.current[selectedIndex2].focus();
if (selectedIndex2 !== undefined && itemRefs3.current[selectedIndex2]) {
itemRefs3.current[selectedIndex2].focus();
}
}, [selectedIndex2]);

Expand Down Expand Up @@ -267,88 +305,103 @@ export const VirtualizedListExamplePage: React.FunctionComponent<{navigation?: a
},
});

const renderItem = ({item}) => {
const renderItem = ({item}: {item: any}) => {
return (
<TouchableHighlight
<Pressable
ref={(ref) => (itemRefs.current[item.index] = ref)}
accessibilityLabel={item.title}
accessibilityRole="listitem"
accessible={true}
focusable={true}
style={styles.item}
onFocus={() => setFocusedIndex1(item.index)}
{...({
onKeyDown: (e: any) => handleKeyDown1(e, item.index),
keyboardEvents: ['keyDown'],
focusable: true,
} as any)}
>
<Text style={styles.title}>{item.title}</Text>
</TouchableHighlight>
</Pressable>
);
};

const renderItem2 = ({item}) => {
const renderItem2 = ({item}: {item: any}) => {
return (
<TouchableHighlight
ref={(ref) => (itemRefs.current[item.index] = ref)}
<Pressable
ref={(ref) => (itemRefs2.current[item.index] = ref)}
accessibilityLabel={item.title}
accessibilityRole="listitem"
accessible={true}
focusable={true}
style={item.index === selectedIndex ? styles.itemSelected : styles.item}
accessibilityState={{selected: item.index === selectedIndex}}
activeOpacity={0.6}
underlayColor={colors.border}
onPress={() => {
setSelectedIndex(item.index);

}}
onAccessibilityTap={() => {
setSelectedIndex(item.index);
}}>
}}
onFocus={() => setFocusedIndex2(item.index)}
{...({
onKeyDown: (e: any) => handleKeyDown2(e, item.index),
keyboardEvents: ['keyDown'],
focusable: true,
} as any)}>
<Text style={item.index === selectedIndex ? styles.titleSelected : styles.title}>{item.title}</Text>
</TouchableHighlight>
</Pressable>
);
};

const renderItem3 = ({item}) => {
const renderItem3 = ({item}: {item: any}) => {
return selectedSupport === 'Multiple' ? (
<TouchableHighlight
<Pressable
ref={(ref) => (itemRefs3.current[item.index] = ref)}
accessibilityLabel={item.title}
accessibilityRole="listitem"
accessible={true}
focusable={true}
style={getList.includes(item.index) ? styles.itemSelected : styles.item}
accessibilityState={{selected: getList.includes(item.index)}}
activeOpacity={0.6}
underlayColor={colors.border}
onPress={() => {
if (getList.includes(item.index)) {
setList(getList.filter((value) => value !== item.index));
} else {
setList(getList.concat([item.index]));
}
}}>
}}
onFocus={() => setFocusedIndex3(item.index)}
{...({
onKeyDown: (e: any) => handleKeyDown3(e, item.index),
keyboardEvents: ['keyDown'],
focusable: true,
} as any)}>
<View style={styles.item}>
<Text style={getList.includes(item.index) ? styles.titleSelected : styles.title}>{item.title}</Text>
</View>
</TouchableHighlight>
</Pressable>
) : (
<TouchableHighlight
ref={(ref) => (itemRefs2.current[item.index] = ref)}
<Pressable
ref={(ref) => (itemRefs3.current[item.index] = ref)}
accessibilityLabel={item.title}
accessibilityRole="listitem"
accessible={true}
focusable={true}
style={
item.index === selectedIndex2 ? styles.itemSelected : styles.item
}
accessibilityState={{selected: item.index === selectedIndex2}}
activeOpacity={0.6}
underlayColor={colors.border}
onPress={() => {
setSelectedIndex2(item.index);
}}
onAccessibilityTap={() => {
setSelectedIndex2(item.index);
}}>
}}
onFocus={() => setFocusedIndex3(item.index)}
{...({
onKeyDown: (e: any) => handleKeyDown3(e, item.index),
keyboardEvents: ['keyDown'],
focusable: true,
} as any)}>
<Text style={item.index === selectedIndex2 ? styles.titleSelected : styles.title}>{item.title}</Text>
</TouchableHighlight>
</Pressable>
);
};

Expand Down
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