Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Fix the issue for swipeup/swipedown #20

Open
wants to merge 2 commits into
base: master
Choose a base branch
from
Open

Fix the issue for swipeup/swipedown #20

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
a4c010f
Fix the issue for swipeup/swipedown
trustme217 Feb 28, 2018
b32b9fe
vertical/horizontal swiping
trustme217 Mar 20, 2018
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
230 changes: 132 additions & 98 deletions index.js
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,109 +1,143 @@
'use strict';
"use strict";

import React, {Component} from 'react';
import {View, PanResponder} from 'react-native';
import React, { Component } from "react";
import { View, PanResponder } from "react-native";

export const swipeDirections = {
SWIPE_UP: 'SWIPE_UP',
SWIPE_DOWN: 'SWIPE_DOWN',
SWIPE_LEFT: 'SWIPE_LEFT',
SWIPE_RIGHT: 'SWIPE_RIGHT'
SWIPE_UP: "SWIPE_UP",
SWIPE_DOWN: "SWIPE_DOWN",
SWIPE_LEFT: "SWIPE_LEFT",
SWIPE_RIGHT: "SWIPE_RIGHT"
};

const swipeConfig = {
velocityThreshold: 0.3,
directionalOffsetThreshold: 80
minVelocity: 0.3,
minDistance: 40,
maxOtherDistance: 40
};

function isValidSwipe(velocity, velocityThreshold, directionalOffset, directionalOffsetThreshold) {
return Math.abs(velocity) > velocityThreshold && Math.abs(directionalOffset) < directionalOffsetThreshold;
function isValidSwipe(
velocity,
minVelocity,
distance,
minDistance,
otherDistance,
maxOtherDistance
) {
return (
Math.abs(velocity) > minVelocity
&& (!minDistance || Math.abs(distance) >= minDistance)
&& (!maxOtherDistance || Math.abs(otherDistance) < Math.abs(distance))
);
}

class GestureRecognizer extends Component {

constructor(props, context) {
super(props, context);
this.swipeConfig = Object.assign(swipeConfig, props.config);
}

componentWillReceiveProps(props) {
this.swipeConfig = Object.assign(swipeConfig, props.config);
}

componentWillMount() {
const responderEnd = this._handlePanResponderEnd.bind(this);
const shouldSetResponder = this._handleShouldSetPanResponder.bind(this);
this._panResponder = PanResponder.create({ //stop JS beautify collapse
onStartShouldSetPanResponder: shouldSetResponder,
onMoveShouldSetPanResponder: shouldSetResponder,
onPanResponderRelease: responderEnd,
onPanResponderTerminate: responderEnd
});
}

_handleShouldSetPanResponder(evt, gestureState) {
return evt.nativeEvent.touches.length === 1 && !this._gestureIsClick(gestureState);
}

_gestureIsClick(gestureState) {
return Math.abs(gestureState.dx) < 5 && Math.abs(gestureState.dy) < 5;
}

_handlePanResponderEnd(evt, gestureState) {
const swipeDirection = this._getSwipeDirection(gestureState);
this._triggerSwipeHandlers(swipeDirection, gestureState);
}

_triggerSwipeHandlers(swipeDirection, gestureState) {
const {onSwipe, onSwipeUp, onSwipeDown, onSwipeLeft, onSwipeRight} = this.props;
const {SWIPE_LEFT, SWIPE_RIGHT, SWIPE_UP, SWIPE_DOWN} = swipeDirections;
onSwipe && onSwipe(swipeDirection, gestureState);
switch (swipeDirection) {
case SWIPE_LEFT:
onSwipeLeft && onSwipeLeft(gestureState);
break;
case SWIPE_RIGHT:
onSwipeRight && onSwipeRight(gestureState);
break;
case SWIPE_UP:
onSwipeUp && onSwipeUp(gestureState);
break;
case SWIPE_DOWN:
onSwipeDown && onSwipeDown(gestureState);
break;
}
}

_getSwipeDirection(gestureState) {
const {SWIPE_LEFT, SWIPE_RIGHT, SWIPE_UP, SWIPE_DOWN} = swipeDirections;
const {dx, dy} = gestureState;
if (this._isValidHorizontalSwipe(gestureState)) {
return (dx > 0)
? SWIPE_RIGHT
: SWIPE_LEFT;
} else if (this._isValidVerticalSwipe(gestureState)) {
return (dy > 0)
? SWIPE_DOWN
: SWIPE_UP;
}
return null;
}

_isValidHorizontalSwipe(gestureState) {
const {vx, dy} = gestureState;
const {velocityThreshold, directionalOffsetThreshold} = this.swipeConfig;
return isValidSwipe(vx, velocityThreshold, dy, directionalOffsetThreshold);
}

_isValidVerticalSwipe(gestureState) {
const {vy, dx} = gestureState;
const {velocityThreshold, directionalOffsetThreshold} = this.swipeConfig;
return isValidSwipe(vy, velocityThreshold, dx, directionalOffsetThreshold);
}

render() {
return (<View {...this.props} {...this._panResponder.panHandlers}/>);
}
};
class Swipe extends Component {
constructor(props, context) {
super(props, context);
this.swipeConfig = Object.assign(swipeConfig, props.config);
}

componentWillReceiveProps(props) {
this.swipeConfig = Object.assign(swipeConfig, props.config);
}

componentWillMount() {
const responderEnd = this._handlePanResponderEnd.bind(this);
const shouldSetResponder = this._handleShouldSetPanResponder.bind(this);
this._panResponder = PanResponder.create({
//stop JS beautify collapse
onStartShouldSetPanResponder: shouldSetResponder,
onMoveShouldSetPanResponder: shouldSetResponder,
onPanResponderRelease: responderEnd,
onPanResponderTerminate: responderEnd
});
}

_handleShouldSetPanResponder(evt, gestureState) {
return (
evt.nativeEvent.touches.length === 1 && !this._gestureIsClick(gestureState) && this._validateSwipe(gestureState)
);
}

_validateSwipe(gestureState) {
const {
onSwipe,
onSwipeUp,
onSwipeDown,
onSwipeLeft,
onSwipeRight
} = this.props;
const swipeDirection = this._getSwipeDirection(gestureState);
const { SWIPE_LEFT, SWIPE_RIGHT, SWIPE_UP, SWIPE_DOWN } = swipeDirections;
return (
((onSwipe || onSwipeUp) && swipeDirection === SWIPE_UP) ||
((onSwipe || onSwipeDown) && swipeDirection === SWIPE_DOWN) ||
((onSwipe || onSwipeLeft) && swipeDirection === SWIPE_LEFT) ||
((onSwipe || onSwipeRight) && swipeDirection === SWIPE_RIGHT)
);
}

_gestureIsClick(gestureState) {
return Math.abs(gestureState.dx) < 5 && Math.abs(gestureState.dy) < 5;
}

_handlePanResponderEnd(evt, gestureState) {
const swipeDirection = this._getSwipeDirection(gestureState);
this._triggerSwipeHandlers(swipeDirection, gestureState);
}

_triggerSwipeHandlers(swipeDirection, gestureState) {
const {
onSwipe,
onSwipeUp,
onSwipeDown,
onSwipeLeft,
onSwipeRight
} = this.props;
const { SWIPE_LEFT, SWIPE_RIGHT, SWIPE_UP, SWIPE_DOWN } = swipeDirections;
onSwipe && onSwipe(swipeDirection, gestureState);
switch (swipeDirection) {
case SWIPE_LEFT:
onSwipeLeft && onSwipeLeft(gestureState);
break;
case SWIPE_RIGHT:
onSwipeRight && onSwipeRight(gestureState);
break;
case SWIPE_UP:
onSwipeUp && onSwipeUp(gestureState);
break;
case SWIPE_DOWN:
onSwipeDown && onSwipeDown(gestureState);
break;
}
}

_getSwipeDirection(gestureState) {
const { SWIPE_LEFT, SWIPE_RIGHT, SWIPE_UP, SWIPE_DOWN } = swipeDirections;
const { dx, dy } = gestureState;
if (this._isValidHorizontalSwipe(gestureState)) {
return dx > 0 ? SWIPE_RIGHT : SWIPE_LEFT;
} else if (this._isValidVerticalSwipe(gestureState)) {
return dy > 0 ? SWIPE_DOWN : SWIPE_UP;
}
return null;
}

_isValidHorizontalSwipe(gestureState) {
const { vx, dx, dy } = gestureState;
const { minVelocity, minDistance, maxOtherDistance } = this.swipeConfig;
return isValidSwipe(vx, minVelocity, dx, minDistance, dy, maxOtherDistance);
}

_isValidVerticalSwipe(gestureState) {
const { vy, dx, dy } = gestureState;
const { minVelocity, minDistance, maxOtherDistance } = this.swipeConfig;
return isValidSwipe(vy, minVelocity, dy, minDistance, dx, maxOtherDistance);
}

render() {
return <View {...this.props} {...this._panResponder.panHandlers} />;
}
}

export default GestureRecognizer;
export default Swipe;