mirror of https://github.com/vector-im/riot-web
80 lines
2.2 KiB
TypeScript
80 lines
2.2 KiB
TypeScript
/*
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Copyright 2019 - 2021 The Matrix.org Foundation C.I.C.
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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 (throttled).
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* @event module:utils~ResizeNotifier#"middlePanelResized"
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*/
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/**
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* Fires when the middle panel has been resized by a pixel.
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* @event module:utils~ResizeNotifier#"middlePanelResizedNoisy"
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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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private _isResizing = false;
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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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private throttledMiddlePanel = throttle(() => this.emit("middlePanelResized"), 200);
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public get isResizing() {
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return this._isResizing;
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}
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public startResizing() {
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this._isResizing = true;
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this.emit("isResizing", true);
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}
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public stopResizing() {
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this._isResizing = false;
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this.emit("isResizing", false);
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}
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private noisyMiddlePanel() {
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this.emit("middlePanelResizedNoisy");
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}
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private updateMiddlePanel() {
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this.throttledMiddlePanel();
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this.noisyMiddlePanel();
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}
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// can be called in quick succession
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public notifyLeftHandleResized() {
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// don't emit event for own region
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this.updateMiddlePanel();
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}
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// can be called in quick succession
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public notifyRightHandleResized() {
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this.updateMiddlePanel();
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}
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public notifyTimelineHeightChanged() {
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this.updateMiddlePanel();
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}
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// can be called in quick succession
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public notifyWindowResized() {
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this.updateMiddlePanel();
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}
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}
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