////  ApplicationEventHandler.h//  interface/src////  Split from Application.cpp by HifiExperiments on 3/30/24//  Created by Andrzej Kapolka on 5/10/13.//  Copyright 2013 High Fidelity, Inc.//  Copyright 2020 Vircadia contributors.//  Copyright 2022-2023 Overte e.V.////  Distributed under the Apache License, Version 2.0.//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html//  SPDX-License-Identifier: Apache-2.0// #ifndef hifi_ApplicationEventHandler_h#define hifi_ApplicationEventHandler_h #include <QtCore/QAbstractNativeEventFilter>#include <qsystemdetection.h> #include <MainWindow.h> #include "Application.h" #ifdef Q_OS_WINstatic const UINT UWM_IDENTIFY_INSTANCES =    RegisterWindowMessage("UWM_IDENTIFY_INSTANCES_{8AB82783-B74A-4258-955B-8188C22AA0D6}_" + qgetenv("USERNAME"));static const UINT UWM_SHOW_APPLICATION =    RegisterWindowMessage("UWM_SHOW_APPLICATION_{71123FD6-3DA8-4DC1-9C27-8A12A6250CBA}_" + qgetenv("USERNAME")); class MyNativeEventFilter : public QAbstractNativeEventFilter {public:    static MyNativeEventFilter& getInstance() {        static MyNativeEventFilter staticInstance;        return staticInstance;    }     bool nativeEventFilter(const QByteArray &eventType, void* msg, long* result) Q_DECL_OVERRIDE {        if (eventType == "windows_generic_MSG") {            MSG* message = (MSG*)msg;             if (message->message == UWM_IDENTIFY_INSTANCES) {                *result = UWM_IDENTIFY_INSTANCES;                return true;            }             if (message->message == UWM_SHOW_APPLICATION) {                MainWindow* applicationWindow = qApp->getWindow();                if (applicationWindow->isMinimized()) {                    applicationWindow->showNormal();  // Restores to windowed or maximized state appropriately.                }                qApp->setActiveWindow(applicationWindow);  // Flashes the taskbar icon if not focus.                return true;            }             // Attempting to close MIDI interfaces of a hot-unplugged device can result in audio-driver deadlock.            // Detecting MIDI devices that have been added/removed after starting Inteface has been disabled.            // https://support.microsoft.com/en-us/help/4460006/midi-device-app-hangs-when-former-midi-api-is-used#if 0            if (message->message == WM_DEVICECHANGE) {                const float MIN_DELTA_SECONDS = 2.0f; // de-bounce signal                static float lastTriggerTime = 0.0f;                const float deltaSeconds = secTimestampNow() - lastTriggerTime;                lastTriggerTime = secTimestampNow();                if (deltaSeconds > MIN_DELTA_SECONDS) {                    Midi::USBchanged();                // re-scan the MIDI bus                }            }#endif        }        return false;    }};#endif #endif  // hifi_ApplicationEventHandler_h