1 | using System; |
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2 | using System.Runtime.InteropServices; |
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3 | using System.Windows.Forms; |
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4 | |
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5 | public sealed class ClipboardListener |
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6 | { |
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7 | private static ClipboardListener instance = new ClipboardListener(); |
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8 | |
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9 | public delegate void ClipboardUpdateHandler(string contents); |
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10 | |
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11 | /// <summary> |
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12 | /// Tapahtuu kun leikepöydän sisältö muuttuu |
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13 | /// </summary> |
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14 | public static event ClipboardUpdateHandler ClipboardUpdate; |
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15 | |
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16 | private static NotificationForm _form = new NotificationForm(); |
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17 | |
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18 | private class NotificationForm : Form |
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19 | { |
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20 | public NotificationForm() |
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21 | { |
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22 | NativeMethods.SetParent(Handle, NativeMethods.HWND_MESSAGE); |
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23 | NativeMethods.AddClipboardFormatListener(Handle); |
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24 | } |
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25 | |
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26 | protected override void WndProc(ref Message m) |
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27 | { |
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28 | if (m.Msg == NativeMethods.WM_CLIPBOARDUPDATE) |
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29 | { |
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30 | var contents = Clipboard.GetText(); |
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31 | var handler = ClipboardUpdate; |
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32 | if (handler != null && contents.Length > 0) |
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33 | { |
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34 | handler(contents); |
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35 | } |
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36 | } |
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37 | base.WndProc(ref m); |
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38 | } |
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39 | } |
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40 | } |
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41 | |
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42 | internal static class NativeMethods |
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43 | { |
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44 | // See http://msdn.microsoft.com/en-us/library/ms649021%28v=vs.85%29.aspx |
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45 | public const int WM_CLIPBOARDUPDATE = 0x031D; |
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46 | public static IntPtr HWND_MESSAGE = new IntPtr(-3); |
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47 | |
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48 | // See http://msdn.microsoft.com/en-us/library/ms632599%28VS.85%29.aspx#message_only |
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49 | [DllImport("user32.dll", SetLastError = true)] |
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50 | [return: MarshalAs(UnmanagedType.Bool)] |
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51 | public static extern bool AddClipboardFormatListener(IntPtr hwnd); |
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52 | |
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53 | // See http://msdn.microsoft.com/en-us/library/ms633541%28v=vs.85%29.aspx |
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54 | // See http://msdn.microsoft.com/en-us/library/ms649033%28VS.85%29.aspx |
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55 | [DllImport("user32.dll", SetLastError = true)] |
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56 | public static extern IntPtr SetParent(IntPtr hWndChild, IntPtr hWndNewParent); |
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57 | } |
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