devextreme
Version:
HTML5 JavaScript Component Suite for Responsive Web Development
63 lines (61 loc) • 2.24 kB
JavaScript
/**
* DevExtreme (cjs/events/core/wheel.js)
* Version: 21.1.4
* Build date: Mon Jun 21 2021
*
* Copyright (c) 2012 - 2021 Developer Express Inc. ALL RIGHTS RESERVED
* Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
*/
;
exports.name = void 0;
var _renderer = _interopRequireDefault(require("../../core/renderer"));
var _events_engine = _interopRequireDefault(require("../../events/core/events_engine"));
var _event_registrator = _interopRequireDefault(require("./event_registrator"));
var _index = require("../utils/index");
function _interopRequireDefault(obj) {
return obj && obj.__esModule ? obj : {
default: obj
}
}
var EVENT_NAME = "dxmousewheel";
exports.name = EVENT_NAME;
var EVENT_NAMESPACE = "dxWheel";
var NATIVE_EVENT_NAME = "wheel";
var PIXEL_MODE = 0;
var DELTA_MUTLIPLIER = 30;
var wheel = {
setup: function(element) {
var $element = (0, _renderer.default)(element);
_events_engine.default.on($element, (0, _index.addNamespace)(NATIVE_EVENT_NAME, EVENT_NAMESPACE), wheel._wheelHandler.bind(wheel))
},
teardown: function(element) {
_events_engine.default.off(element, ".".concat(EVENT_NAMESPACE))
},
_wheelHandler: function(e) {
var _e$originalEvent = e.originalEvent,
deltaMode = _e$originalEvent.deltaMode,
deltaY = _e$originalEvent.deltaY,
deltaX = _e$originalEvent.deltaX,
deltaZ = _e$originalEvent.deltaZ;
(0, _index.fireEvent)({
type: EVENT_NAME,
originalEvent: e,
delta: this._normalizeDelta(deltaY, deltaMode),
deltaX: deltaX,
deltaY: deltaY,
deltaZ: deltaZ,
deltaMode: deltaMode,
pointerType: "mouse"
});
e.stopPropagation()
},
_normalizeDelta: function(delta) {
var deltaMode = arguments.length > 1 && void 0 !== arguments[1] ? arguments[1] : PIXEL_MODE;
if (deltaMode === PIXEL_MODE) {
return -delta
} else {
return -DELTA_MUTLIPLIER * delta
}
}
};
(0, _event_registrator.default)(EVENT_NAME, wheel);