96 lines
2.9 KiB
C#
96 lines
2.9 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading;
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using System.Windows.Forms;
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using Trigger.Events;
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namespace Trigger
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{
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partial class Main
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{
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#region Structs & Constants
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internal const int DEVICE_NOTIFY_WINDOW_HANDLE = 0x00000000;
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internal const int DEVICE_NOTIFY_SERVICE_HANDLE = 0x00000001;
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#endregion
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#region Events
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/// <summary>
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/// <para>When a Win32 <see cref="Message"/> was received</para>
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/// <para>You may have to register this Form for receiving such messages first</para>
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/// </summary>
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private static event EventPlugin.EventValue<Message> OnMessageReceived;
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/// <summary>
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/// <para>When a Win32 <see cref="Message"/> was received</para>
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/// <para>You may have to register this Form for receiving such messages first</para>
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/// </summary>
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public static event EventPlugin.EventValue<Message> MessageReceived
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{
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add
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{
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OnMessageReceived += value;
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}
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remove
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{
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OnMessageReceived -= value;
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}
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}
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#endregion
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#region Properties
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/// <summary><para>Takes care of thread safe access to this class </para></summary>
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private ReaderWriterLock _lock = new ReaderWriterLock();
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/// <summary><para>Which messages shall be processed</para></summary>
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private Dictionary<int, byte> _messageSet = new Dictionary<int, byte>();
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#endregion
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#region Methods
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/// <summary>
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/// <para>Enable the specified <paramref name="messageID"/> for being processed and forwared</para>
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/// </summary>
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/// <param name="messageID"></param>
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public void RegisterEventForMessage(Classes.System.WindowsMessages messageID)
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{
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_lock.AcquireWriterLock(Timeout.Infinite);
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if (!_messageSet.ContainsKey((int)messageID))
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_messageSet.Add((int)messageID, 1);
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else
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_messageSet[(int)messageID]++;
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_lock.ReleaseWriterLock();
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}
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/// <summary>
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/// <para>Disable the specified <paramref name="messageID"/> for being processed and forwared</para>
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/// </summary>
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/// <param name="messageID"></param>
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public void UnregisterEventForMessage(Classes.System.WindowsMessages messageID)
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{
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_lock.AcquireWriterLock(Timeout.Infinite);
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if (_messageSet.ContainsKey((int)messageID) && _messageSet[(int)messageID] > 1)
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_messageSet[(int)messageID]--;
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_lock.ReleaseWriterLock();
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}
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/// <summary>
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/// <para>The actual method that is being called when a <see cref="Message"/> is broadcasted</para>
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/// </summary>
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/// <param name="m"></param>
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protected override void WndProc(ref Message m)
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{
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_lock.AcquireWriterLock(Timeout.Infinite);
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bool handleEvent = _messageSet.ContainsKey(m.Msg) && _messageSet[m.Msg] > 0;
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_lock.ReleaseWriterLock();
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if (handleEvent && OnMessageReceived != null)
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{
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Message mm = m;
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ThreadPool.QueueUserWorkItem(s => OnMessageReceived(null, new EventArgsValue<Message>(mm)));
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}
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base.WndProc(ref m);
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}
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#endregion
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}
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}
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