devextreme
Version:
JavaScript/TypeScript Component Suite for Responsive Web Development
81 lines (79 loc) • 2.7 kB
JavaScript
/**
* DevExtreme (cjs/__internal/events/core/m_wheel.js)
* Version: 25.2.7
* Build date: Tue May 05 2026
*
* Copyright (c) 2012 - 2026 Developer Express Inc. ALL RIGHTS RESERVED
* Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
*/
;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.name = void 0;
var _event_registrator = _interopRequireDefault(require("../../../common/core/events/core/event_registrator"));
var _events_engine = _interopRequireDefault(require("../../../common/core/events/core/events_engine"));
var _index = require("../../../common/core/events/utils/index");
var _renderer = _interopRequireDefault(require("../../../core/renderer"));
function _interopRequireDefault(e) {
return e && e.__esModule ? e : {
default: e
}
}
const EVENT_NAME = exports.name = "dxmousewheel";
const EVENT_NAMESPACE = "dxWheel";
const NATIVE_EVENT_NAME = "wheel";
const PIXEL_MODE = 0;
const DELTA_MULTIPLIER = 30;
var DeltaMode;
! function(DeltaMode) {
DeltaMode[DeltaMode.DOM_DELTA_PIXEL = 0] = "DOM_DELTA_PIXEL";
DeltaMode[DeltaMode.DOM_DELTA_LINE = 1] = "DOM_DELTA_LINE";
DeltaMode[DeltaMode.DOM_DELTA_PAGE = 2] = "DOM_DELTA_PAGE"
}(DeltaMode || (DeltaMode = {}));
const wheel = {
setup(element) {
const $element = (0, _renderer.default)(element);
_events_engine.default.on($element, (0, _index.addNamespace)("wheel", "dxWheel"), wheel._wheelHandler.bind(wheel))
},
teardown(element) {
_events_engine.default.off(element, ".dxWheel")
},
_wheelHandler(e) {
const {
deltaMode: deltaMode,
deltaY: deltaY,
deltaX: deltaX,
deltaZ: deltaZ
} = e.originalEvent;
const delta = this._getWheelDelta(deltaY, deltaX);
(0, _index.fireEvent)({
type: EVENT_NAME,
originalEvent: e,
delta: this._normalizeDelta(delta, deltaMode),
deltaX: deltaX,
deltaY: deltaY,
deltaZ: deltaZ,
deltaMode: deltaMode,
pointerType: "mouse"
});
e.stopPropagation()
},
_normalizeDelta(delta) {
let deltaMode = arguments.length > 1 && void 0 !== arguments[1] ? arguments[1] : 0;
if (0 === deltaMode) {
return -delta
}
return -30 * delta
},
_getWheelDelta(deltaY, deltaX) {
if (deltaY) {
return deltaY
}
if (deltaX) {
return deltaX
}
return 0
}
};
(0, _event_registrator.default)(EVENT_NAME, wheel);