Ember-gesture-modifiers NPM

ember-gesture-modifiers

Addon that provides gestures as modifiers.

Compatibility

Ember.js v3.28 or above
Embroider or ember-auto-import v2

Installation

ember install ember-gesture-modifiers

Usage

Currently only a Pan modifier is provided. More gestures will be added in the future.

Pan modifier

<div
  {{did-pan
    onPanStart=this.didPanStart
    onPan=this.didPan
    onPanEnd=this.didPanEnd
  }}
>

arguments

onPanStart - hook fired when a pan is started
onPan - hook fired when the pan is updated
onPanEnd - hook fired when a pan has ended
threshold (default: 10) - minimum touch movement needed in px to start a pan
axis (default: 'horizontal') - axis for the pan event to be recognized ('horizontal', 'vertical' or 'both')
capture (default: false) - whether or not to use capture events instead of bubbling
preventScroll (default: true) - whether or not to prevent scroll during panning
pointerTypes (default: 'touch') - the pointer types to support (one or more of 'touch', 'mouse', 'pen')

The hooks are passed a TouchData object which looks like:

{
  originalEvent: <TouchEvent>,
  timeStamp: 2896.435000002384,
  initial: {
    x: 427.87109375,
    y: 276.98046875,
    timeStamp: 2251.9500000053085
  },
  current: {
    deltaX: 0,
    deltaY: 0,
    x: 192.95703125,
    y: 279.12890625,
    distance: 234.92388670364133,
    distanceX: -234.9140625,
    distanceY: 2.1484375,
    angle: 180.52399148917002,
    overallVelocityX: -0.36449888283057935,
    overallVelocityY: 0.0033335725424327154,
    overallVelocity: -0.36449888283057935,
    velocityX: -0.03269026669500546,
    velocityY: 0,
    velocity: -0.03269026669500546
  },
  cache: {
    velocity: {
      distanceX: -234.9140625,
      distanceY: 2.1484375,
      timeStamp: 2613.435000006575
    }
  }
}

Testing

A pan test helper is exposed by the addon.

import { pan } from 'ember-gesture-modifiers/test-support';

...

// arg1: CSS selector on which the pan happens
// arg2: a direction in which the pan should happen. Either 'left', 'right', 'down', 'up' or 'up-right'.
await pan('.my-css-selector', 'right');