/* * Copyright (c) 2024 ETH Zürich, IT Services * * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ using System; using SafeExamBrowser.WindowsApi.Contracts; using SafeExamBrowser.WindowsApi.Contracts.Events; namespace SafeExamBrowser.UserInterface.Shared.Activators { public abstract class TouchActivator { private Guid? hookId; private INativeMethods nativeMethods; protected bool paused; protected TouchActivator(INativeMethods nativeMethods) { this.nativeMethods = nativeMethods; } protected abstract void OnBeforeResume(); protected abstract bool Process(MouseButton button, MouseButtonState state, MouseInformation info); public void Pause() { paused = true; } public void Resume() { OnBeforeResume(); paused = false; } public void Start() { hookId = nativeMethods.RegisterMouseHook(MouseHookCallback); } public void Stop() { if (hookId.HasValue) { nativeMethods.DeregisterMouseHook(hookId.Value); } } private bool MouseHookCallback(MouseButton button, MouseButtonState state, MouseInformation info) { if (!paused && info.IsTouch) { return Process(button, state, info); } return false; } } }