LxtalkUIView/talkview/src/js/directive/mousewheel .js

(function() {
    'use strict';

    angular
        .module('appMessage')
        .directive('ngMouseWheelUp', function() {
            return function(scope, element, attrs) {
                element.bind("DOMMouseScroll mousewheel onmousewheel", function(event) {
                    // cross-browser wheel delta
                    var event = window.event || event; // old IE support
                    var delta = Math.max(-1, Math.min(1, (event.wheelDelta || -event.detail)));
                    if (delta > 0) {
                        scope.$apply(function() {
                            scope.$eval(attrs.ngMouseWheelUp);
                        });
                        // for IE
                        event.returnValue = false;
                        // for Chrome and Firefox
                        if (event.preventDefault) {
                            event.preventDefault();
                        }
                    }
                });
            };
        });
})();