npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

react-native-swipeable-item

v2.0.9

Published

A horizontally swipeable flatlist row compatible with react-native-draggable-flatlist

Downloads

17,112

Readme

React Native Swipeable Item

A swipeable component with underlay for React Native. Fully native interactions powered by Reanimated and React Native Gesture Handler

Compatible with React Native Draggable Flatlist

Swipeable Item demo

Install

  1. Follow installation instructions for reanimated and react-native-gesture-handler
  2. npm install or yarn add react-native-swipeable-item
  3. import SwipeableItem from 'react-native-swipeable-item'

Props

NOTE: Naming is hard. When you swipe right, you reveal the item on the left. So what do you name these things? I have decided to name everything according to swipe direction. Therefore, a swipe left reveals the renderUnderlayLeft() component with width underlayWidthLeft. Not perfect but it works.

type OpenCloseOptions = { animated?: boolean };
type OpenPromiseFn = (
  snapPoint?: number,
  options?: OpenCloseOptions
) => Promise<void>;
type ClosePromiseFn = (options?: OpenCloseOptions) => Promise<void>;

export type UnderlayParams<T> = {
  item: T;
  open: OpenPromiseFn;
  close: ClosePromiseFn;
  percentOpen: Animated.DerivedValue<number>;
  isGestureActive: Animated.DerivedValue<boolean>;
  direction: OpenDirection;
};

export type OverlayParams<T> = {
  item: T;
  openLeft: OpenPromiseFn;
  openRight: OpenPromiseFn;
  close: ClosePromiseFn;
  openDirection: OpenDirection;
  percentOpenLeft: Animated.DerivedValue<number>;
  percentOpenRight: Animated.DerivedValue<number>;
};

| Name | Type | Description | | :-------------------- | :---------------------------------------------------------------------- | :----------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | renderUnderlayLeft | RenderUnderlay | Component to be rendered underneath row on left swipe. | | renderUnderlayRight | RenderUnderlay | Component to be rendered underneath row on right swipe. | | snapPointsLeft | number[] | Pixel values left-swipe snaps to (eg. [100, 300]) | | snapPointsRight | number[] | Pixel values right-swipe snaps to (eg. [100, 300]) | | renderOverlay | RenderOverlay | Component to be rendered on top. Use if you need access to programmatic open/close methods. May altenatively pass children to SwipeableItem. | | onChange | (params: { openDirection: OpenDirection, snapPoint: number }) => void | Called when row is opened or closed. | | swipeEnabled | boolean | Enable/disable swipe. Defaults to true. | | activationThreshold | number | Distance finger must travel before swipe engages. Defaults to 20. | | swipeDamping | number | How much swipe velocity determines snap position. A smaller number means swipe velocity will have a larger effect and row will swipe open more easily. Defaults to 10. |

Hooks

| Name | Type | Description | | :----------------------- | :--------------------------------------------------------------------------------------------- | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | useSwipeableItemParams | () => OverlayParams<T> & { open: OpenPromiseFn, percentOpen: Animated.DerivedValue<number> } | Utility hook that reutrns the same params as the render functions are called with. open() and percentOpen params reflect the context in which the hook is called (i.e. within an underlay or overlay component). | | |

function MyUnderlayComponent() {
  // Underlay components "know" which direction to open, so we don't need to call `openLeft()` or `openRight()`, we can just call 'open()'
  // Underlay components also receive the `percentOpen` value of their own direction (`percentOpenLeft` or `percentOpenRight`)
  const swipeableItemParams = useSwipeableItemParams();
  return <TouchableOpacity onPress={swipeableItemParams.open} />;
}

function MyOverlayComponent() {
  // Overlay components get the same params, but have defaults filled in for `open()` and `percentOpen` params.
  const swipeableItemParams = useSwipeableItemParams();
  return <TouchableOpacity onPress={swipeableItemParams.openLeft} />;
}

Instance Methods

| Name | Type | Description | | :------ | :------------------------------------------------------------------------------------------------------------------ | :----------------------------------------------------------- | | open | (OpenDirection.LEFT \| OpenDirection.RIGHT, snapIndex?: number, options?: { animated: boolean }) => Promise<void> | Imperatively open left or right. Promise resolves once open. | | close | (options?: { animated?: boolean}) => Promise<void> | Close all. Promise resolves once closed. |

// Imperative open example
const itemRef: SwipeableItem | null = null

...

<SwipeableItem ref={ref => itemRef = ref} />

...
if (itemRef) itemRef.open(OpenDirection.LEFT)

Notes

Gesture handlers can sometimes capture a gesture unintentionally. If you are using with react-native-draggable-flatlist and the list is periodically not scrolling, try adding a small activationDistance (see example below).

Example

https://snack.expo.io/@computerjazz/swipeable-draggable-list

import React, { useState, useRef, useCallback } from "react";
import {
  Text,
  View,
  StyleSheet,
  FlatList,
  LayoutAnimation,
  TouchableOpacity,
  Platform,
  UIManager,
} from "react-native";
import Animated, { useAnimatedStyle } from "react-native-reanimated";
import SwipeableItem, {
  useSwipeableItemParams,
  OpenDirection,
} from "react-native-swipeable-item";
import DraggableFlatList, {
  RenderItemParams,
  ScaleDecorator,
} from "react-native-draggable-flatlist";
const { multiply, sub } = Animated;

if (Platform.OS === "android") {
  UIManager.setLayoutAnimationEnabledExperimental &&
    UIManager.setLayoutAnimationEnabledExperimental(true);
}
const OVERSWIPE_DIST = 20;
const NUM_ITEMS = 20;

function getColor(i: number) {
  const multiplier = 255 / (NUM_ITEMS - 1);
  const colorVal = i * multiplier;
  return `rgb(${colorVal}, ${Math.abs(128 - colorVal)}, ${255 - colorVal})`;
}

type Item = {
  key: string;
  text: string;
  backgroundColor: string;
  height: number;
};

const initialData: Item[] = [...Array(NUM_ITEMS)].fill(0).map((d, index) => {
  const backgroundColor = getColor(index);
  return {
    text: `row ${index}d`,
    key: `key-${backgroundColor}`,
    backgroundColor,
    height: 100,
  };
});

function App() {
  const [data, setData] = useState(initialData);
  const itemRefs = useRef(new Map());

  const renderItem = useCallback((params: RenderItemParams<Item>) => {
    return <RowItem {...params} itemRefs={itemRefs} />;
  }, []);

  return (
    <View style={styles.container}>
      <DraggableFlatList
        keyExtractor={(item) => item.key}
        data={data}
        renderItem={renderItem}
        onDragEnd={({ data }) => setData(data)}
        activationDistance={20}
      />
    </View>
  );
}

export default App;

type RowItemProps = {
  item: Item;
  drag: () => void;
  itemRefs: React.MutableRefObject<Map<any, any>>;
};

function RowItem({ item, itemRefs, drag }: RowItemProps) {
  return (
    <ScaleDecorator>
      <SwipeableItem
        key={item.key}
        item={item}
        ref={(ref) => {
          if (ref && !itemRefs.current.get(item.key)) {
            itemRefs.current.set(item.key, ref);
          }
        }}
        onChange={({ openDirection }) => {
          if (openDirection !== OpenDirection.NONE) {
            // Close all other open items
            [...itemRefs.current.entries()].forEach(([key, ref]) => {
              if (key !== item.key && ref) ref.close();
            });
          }
        }}
        overSwipe={OVERSWIPE_DIST}
        renderUnderlayLeft={() => <UnderlayLeft drag={drag} />}
        renderUnderlayRight={() => <UnderlayRight />}
        snapPointsLeft={[50, 150, 175]}
        snapPointsRight={[175]}
      >
        <View
          style={[
            styles.row,
            { backgroundColor: item.backgroundColor, height: item.height },
          ]}
        >
          <TouchableOpacity onPressIn={drag}>
            <Text style={styles.text}>{item.text}</Text>
          </TouchableOpacity>
        </View>
      </SwipeableItem>
    </ScaleDecorator>
  );
}

const UnderlayLeft = ({ drag }: { drag: () => void }) => {
  const { item, percentOpen } = useSwipeableItemParams<Item>();
  const animStyle = useAnimatedStyle(
    () => ({
      opacity: percentOpen.value,
    }),
    [percentOpen]
  );

  return (
    <Animated.View
      style={[styles.row, styles.underlayLeft, animStyle]} // Fade in on open
    >
      <TouchableOpacity onPressIn={drag}>
        <Text style={styles.text}>{`[drag]`}</Text>
      </TouchableOpacity>
    </Animated.View>
  );
};

function UnderlayRight() {
  const { close } = useSwipeableItemParams<Item>();
  return (
    <Animated.View style={[styles.row, styles.underlayRight]}>
      <TouchableOpacity onPressOut={close}>
        <Text style={styles.text}>CLOSE</Text>
      </TouchableOpacity>
    </Animated.View>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
  },
  row: {
    flexDirection: "row",
    flex: 1,
    alignItems: "center",
    justifyContent: "center",
    padding: 15,
  },
  text: {
    fontWeight: "bold",
    color: "white",
    fontSize: 32,
  },
  underlayRight: {
    flex: 1,
    backgroundColor: "teal",
    justifyContent: "flex-start",
  },
  underlayLeft: {
    flex: 1,
    backgroundColor: "tomato",
    justifyContent: "flex-end",
  },
});