nwjs/electron window dragging implementation (replacement of -webkit-app-region: drag/no-drag)

app-drag.js

var remote = require('remote')
var $ = require('./lib/jquery')

var win = remote.getCurrentWindow()
var isDragging = false
var winPos
var dX, dY // screen - win

$(document).on('mousedown', '.app-drag', function(e) {
    e = e.originalEvent || e
    var $el = $(e.target)
    var canDrag = $el.closest('.app-no-drag').length <= 0
    if (canDrag) {
        isDragging = true
        winPos = win.getPosition()
        dX = e.screenX - winPos[0]
        dY = e.screenY - winPos[1]
    }
})

$(document).on('mousemove', function(e) {
    if (!isDragging) return
    e = e.originalEvent || e
    var _x = e.screenX - dX
    var _y = e.screenY - dY
    win.setPosition(_x, _y)
})

$(document).on('mouseup', function(e) {
    isDragging = false
})