| Simon Hunt | ab34ecb | 2015-12-11 13:14:48 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2015 Open Networking Laboratory |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | /* |
| 18 | ONOS GUI -- Layer -- Loading Service |
| 19 | |
| 20 | Provides a mechanism to start/stop the loading animation, center screen. |
| 21 | */ |
| 22 | (function () { |
| 23 | 'use strict'; |
| 24 | |
| 25 | // injected references |
| 26 | var $log, $timeout, ts; |
| 27 | |
| 28 | // constants |
| 29 | var id = 'loading-anim', |
| 30 | dir = 'data/img/loading/', |
| 31 | pfx = '/load-', |
| 32 | speed = 100; |
| 33 | |
| 34 | // internal state |
| 35 | var div, |
| 36 | img, |
| 37 | th, |
| 38 | idx, |
| 39 | task; |
| 40 | |
| 41 | function fname(i) { |
| 42 | var z = i > 9 ? '' : '0'; |
| 43 | return dir + th + pfx + z + i + '.png'; |
| 44 | } |
| 45 | |
| 46 | function nextFrame() { |
| 47 | idx = idx === 16 ? 1 : idx + 1; |
| 48 | img.attr('src', fname(idx)); |
| 49 | task = $timeout(nextFrame, speed); |
| 50 | } |
| 51 | |
| 52 | // start displaying 'loading...' animation (idempotent) |
| 53 | function start() { |
| 54 | th = ts.theme(); |
| 55 | div = d3.select('#'+id); |
| 56 | if (div.empty()) { |
| 57 | div = d3.select('body').append('div').attr('id', id); |
| 58 | img = div.append('img').attr('src', fname(1)); |
| 59 | idx = 1; |
| 60 | task = $timeout(nextFrame, speed); |
| 61 | } |
| 62 | } |
| 63 | |
| 64 | // stop displaying 'loading...' animation (idempotent) |
| 65 | function stop() { |
| 66 | if (task) { |
| 67 | $timeout.cancel(task); |
| 68 | task = null; |
| 69 | } |
| 70 | d3.select('#'+id).remove(); |
| 71 | } |
| 72 | |
| 73 | angular.module('onosLayer') |
| 74 | .factory('LoadingService', ['$log', '$timeout', 'ThemeService', |
| 75 | function (_$log_, _$timeout_, _ts_) { |
| 76 | $log = _$log_; |
| 77 | $timeout = _$timeout_; |
| 78 | ts = _ts_; |
| 79 | |
| 80 | return { |
| 81 | start: start, |
| 82 | stop: stop |
| 83 | }; |
| 84 | }]); |
| 85 | |
| 86 | }()); |