90 lines
2.3 KiB
C#
90 lines
2.3 KiB
C#
/*
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* Copyright (c) 2023 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.Threading.Tasks;
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using System.Windows;
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using SafeExamBrowser.Logging.Contracts;
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using SafeExamBrowser.UserInterface.Contracts.Shell;
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using SafeExamBrowser.UserInterface.Contracts.Shell.Events;
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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 class ActionCenterTouchActivator : TouchActivator, IActionCenterActivator
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{
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private const int ACTIVATION_INTERVAL = 100;
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private bool isDown;
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private ILogger logger;
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private INativeMethods nativeMethods;
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public event ActivatorEventHandler Activated;
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public event ActivatorEventHandler Deactivated { add { } remove { } }
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public event ActivatorEventHandler Toggled { add { } remove { } }
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public ActionCenterTouchActivator(ILogger logger, INativeMethods nativeMethods) : base(nativeMethods)
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{
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this.logger = logger;
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this.nativeMethods = nativeMethods;
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}
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protected override void OnBeforeResume()
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{
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isDown = false;
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}
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protected override bool Process(MouseButton button, MouseButtonState state, MouseInformation info)
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{
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var inActivationArea = 0 < info.X && info.X < SystemParameters.PrimaryScreenWidth * 0.1;
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if (button == MouseButton.Left)
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{
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if (state == MouseButtonState.Released)
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{
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isDown = false;
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}
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if (state == MouseButtonState.Pressed && inActivationArea)
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{
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isDown = true;
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Task.Delay(ACTIVATION_INTERVAL).ContinueWith(async _ =>
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{
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for (var t = 0; t < 4; t++)
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{
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if (WasActivated())
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{
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break;
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}
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await Task.Delay(ACTIVATION_INTERVAL);
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}
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});
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}
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}
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return false;
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}
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private bool WasActivated()
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{
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var (x, y) = nativeMethods.GetCursorPosition();
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var hasMoved = x > SystemParameters.PrimaryScreenWidth * 0.1;
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var activate = isDown && hasMoved;
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if (activate)
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{
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logger.Debug("Detected activation gesture for action center.");
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Activated?.Invoke();
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}
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return activate;
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}
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}
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}
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