md2/core/overlay/scroll/reposition-scroll-strategy.js

Angular2 based Material Design components, directives and services are Accordion, Autocomplete, Chips(Tags), Collapse, Colorpicker, Data Table, Datepicker, Dialog(Modal), Menu, Multiselect, Select, Tabs, Tags(Chips), Toast and Tooltip.

import { getMdScrollStrategyAlreadyAttachedError } from './scroll-strategy';
/**
 * Strategy that will update the element position as the user is scrolling.
 */
var RepositionScrollStrategy = (function () {
    function RepositionScrollStrategy(_scrollDispatcher, _config) {
        this._scrollDispatcher = _scrollDispatcher;
        this._config = _config;
        this._scrollSubscription = null;
    }
    RepositionScrollStrategy.prototype.attach = function (overlayRef) {
        if (this._overlayRef) {
            throw getMdScrollStrategyAlreadyAttachedError();
        }
        this._overlayRef = overlayRef;
    };
    RepositionScrollStrategy.prototype.enable = function () {
        var _this = this;
        if (!this._scrollSubscription) {
            var throttle = this._config ? this._config.scrollThrottle : 0;
            this._scrollSubscription = this._scrollDispatcher.scrolled(throttle, function () {
                _this._overlayRef.updatePosition();
            });
        }
    };
    RepositionScrollStrategy.prototype.disable = function () {
        if (this._scrollSubscription) {
            this._scrollSubscription.unsubscribe();
            this._scrollSubscription = null;
        }
    };
    return RepositionScrollStrategy;
}());
export { RepositionScrollStrategy };
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