@hscmap/inertial-mouse

Inertial Mouse

Inertial Mouse for TypeScript

• Wraps native MouseEvent and emit pseudo mousemove events with inertial smooth motion.
• Working Demo

Install

npm instasll --save @hscmap/inertial-mouse

Example (source code of the working demo)

import { InertialMouse, Coord } from "@hscmap/inertial-mouse"


window.addEventListener('load', e => {
    const sandbox = document.querySelector('.sandbox') as HTMLElement
    const cursor = document.querySelector('.cursor') as HTMLElement
    const dxText = document.querySelector('[name="dx"]') as HTMLInputElement
    const dyText = document.querySelector('[name="dy"]') as HTMLInputElement

    function setCursorPosition(r: Coord) {
        cursor.style.left = `${r.x}px`
        cursor.style.top = `${r.y}px`
    }

    const im = new InertialMouse(sandbox, {
        down: (e) => {
            setCursorPosition(e.r)
            cursor.classList.add('pressed')
        },
        up: () => {
            cursor.classList.remove('pressed')
        },
        move: (e) => {
            setCursorPosition(e.r)
            dxText.value = `${e.d.x}`
            dyText.value = `${e.d.y}`
        },
        movestart: () => cursor.classList.add('moving'),
        moveend: () => cursor.classList.remove('moving'),
    })

    document.addEventListener('change', e => {
        const target = e.target as HTMLInputElement
        if (target.matches('[name="slick"]'))
            im.slick = target.checked
        if (target.matches('[name="friction"]'))
            im.friction = Number(target.value)
        if (target.matches('[name="k"]'))
            im.k = Number(target.value)
    })
})


document.addEventListener('selectstart', e => e.preventDefault()) // disable selection