60 lines
1.8 KiB
JavaScript
60 lines
1.8 KiB
JavaScript
/*
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Copyright 2019 New Vector Ltd
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Licensed under the Apache License, Version 2.0 (the "License");
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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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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,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* Fires when the middle panel has been resized.
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* @event module:utils~ResizeNotifier#"middlePanelResized"
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*/
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import { EventEmitter } from "events";
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import { throttle } from "lodash";
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export default class ResizeNotifier extends EventEmitter {
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constructor() {
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super();
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// with default options, will call fn once at first call, and then every x ms
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// if there was another call in that timespan
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this._throttledMiddlePanel = throttle(() => this.emit("middlePanelResized"), 200);
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}
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notifyBannersChanged() {
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this.emit("leftPanelResized");
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this.emit("middlePanelResized");
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}
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// can be called in quick succession
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notifyLeftHandleResized() {
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// don't emit event for own region
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this._throttledMiddlePanel();
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}
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// can be called in quick succession
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notifyRightHandleResized() {
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this._throttledMiddlePanel();
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}
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// can be called in quick succession
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notifyWindowResized() {
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// no need to throttle this one,
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// also it could make scrollbars appear for
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// a split second when the room list manual layout is now
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// taller than the available space
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this.emit("leftPanelResized");
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this._throttledMiddlePanel();
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}
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}
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