53 lines
1.2 KiB
C#
53 lines
1.2 KiB
C#
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/*
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* Copyright (c) 2019 ETH Zürich, Educational Development and Technology (LET)
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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using System;
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using SafeExamBrowser.WindowsApi.Contracts;
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using SafeExamBrowser.WindowsApi.Contracts.Events;
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namespace SafeExamBrowser.UserInterface.Shared.Activators
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{
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public abstract class TouchActivator
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{
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private INativeMethods nativeMethods;
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private Guid? hookId;
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protected bool Paused { get; set; }
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protected TouchActivator(INativeMethods nativeMethods)
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{
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this.nativeMethods = nativeMethods;
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}
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protected abstract bool Process(MouseButton button, MouseButtonState state, MouseInformation info);
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public void Start()
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{
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hookId = nativeMethods.RegisterMouseHook(MouseHookCallback);
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}
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public void Stop()
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{
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if (hookId.HasValue)
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{
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nativeMethods.DeregisterMouseHook(hookId.Value);
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}
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}
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private bool MouseHookCallback(MouseButton button, MouseButtonState state, MouseInformation info)
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{
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if (!Paused && info.IsTouch)
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{
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return Process(button, state, info);
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}
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return false;
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}
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}
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}
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