David Langley
491f0cd08a
* Copyright headers 1 * Licence headers 2 * Copyright Headers 3 * Copyright Headers 4 * Copyright Headers 5 * Copyright Headers 6 * Copyright headers 7 * Add copyright headers for html and config file * Replace license files and update package.json * Update with CLA * lint
71 lines
1.8 KiB
TypeScript
71 lines
1.8 KiB
TypeScript
/*
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Copyright 2024 New Vector Ltd.
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Copyright 2019-2021 The Matrix.org Foundation C.I.C.
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SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only
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Please see LICENSE files in the repository root for full details.
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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(): boolean {
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return this._isResizing;
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}
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public startResizing(): void {
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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(): void {
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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(): void {
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this.emit("middlePanelResizedNoisy");
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}
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private updateMiddlePanel(): void {
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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(): void {
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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(): void {
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this.updateMiddlePanel();
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}
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public notifyTimelineHeightChanged(): void {
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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(): void {
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this.updateMiddlePanel();
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}
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}
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