121 lines
4.7 KiB
JavaScript
121 lines
4.7 KiB
JavaScript
/*****************************************************************************
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* Open MCT Web, Copyright (c) 2014-2015, United States Government
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* as represented by the Administrator of the National Aeronautics and Space
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* Administration. All rights reserved.
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*
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* Open MCT Web is licensed under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0.
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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* Open MCT Web includes source code licensed under additional open source
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* licenses. See the Open Source Licenses file (LICENSES.md) included with
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* this source code distribution or the Licensing information page available
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* at runtime from the About dialog for additional information.
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*****************************************************************************/
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/*global define*/
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define(
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[],
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function () {
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"use strict";
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/**
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* The `info` gesture displays domain object metadata in a
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* bubble on hover.
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*
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* @constructor
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* @param $timeout Angular's `$timeout`
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* @param {InfoService} infoService a service which shows info bubbles
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* @param {number} DELAY delay, in milliseconds, before bubble appears
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* @param element jqLite-wrapped DOM element
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* @param {DomainObject} domainObject the domain object for which to
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* show information
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*/
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function InfoGesture($timeout, infoService, DELAY, element, domainObject) {
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var dismissBubble,
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pendingBubble,
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mousePosition,
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scopeOff;
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function trackPosition(event) {
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// Record mouse position, so bubble can be shown at latest
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// mouse position (not just where the mouse entered)
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mousePosition = [ event.clientX, event.clientY ];
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}
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function hideBubble() {
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// If a bubble is showing, dismiss it
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if (dismissBubble) {
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dismissBubble();
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element.off('mouseleave', hideBubble);
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dismissBubble = undefined;
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}
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// If a bubble will be shown on a timeout, cancel that
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if (pendingBubble) {
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$timeout.cancel(pendingBubble);
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element.off('mousemove', trackPosition);
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element.off('mouseleave', hideBubble);
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pendingBubble = undefined;
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}
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// Also clear mouse position so we don't have a ton of tiny
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// arrays allocated while user mouses over things
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mousePosition = undefined;
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}
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function showBubble(event) {
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trackPosition(event);
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// Also need to track position during hover
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element.on('mousemove', trackPosition);
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// Show the bubble, after a suitable delay (if mouse has
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// left before this time is up, this will be canceled.)
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pendingBubble = $timeout(function () {
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dismissBubble = infoService.display(
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"info-table",
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domainObject.getModel().name,
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domainObject.useCapability('metadata'),
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mousePosition
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);
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element.off('mousemove', trackPosition);
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pendingBubble = undefined;
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}, DELAY);
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element.on('mouseleave', hideBubble);
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}
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// Show bubble (on a timeout) on mouse over
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element.on('mouseenter', showBubble);
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// Also make sure we dismiss bubble if representation is destroyed
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// before the mouse actually leaves it
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scopeOff = element.scope().$on('$destroy', hideBubble);
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return {
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/**
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* Detach any event handlers associated with this gesture.
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* @memberof InfoGesture
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* @method
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*/
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destroy: function () {
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// Dismiss any active bubble...
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hideBubble();
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// ...and detach listeners
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element.off('mouseenter', showBubble);
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scopeOff();
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}
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};
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}
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return InfoGesture;
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}
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); |