protected override bool ProcessKeyEventArgs(ref Message m)
{
return(HandleKeyboardEvent(m.Msg, m.WParam.ToInt32(), KeyboardHook.GetModifierKeyState()));
}
protected bool HandleKeyboardEvent(Int32 msg, Int32 virtualKey, KeyboardHook.ModifierKeys modifierKeys)
{
if (DesignMode || !IsConnected)
return false;
if (modifierKeys != PreviousModifierKeyState)
SyncModifierKeyState(modifierKeys);
if (IsModifierKey(virtualKey)) return true;
Boolean pressed;
switch (msg)
{
case Win32.WM_KEYDOWN:
case Win32.WM_SYSKEYDOWN:
pressed = true;
break;
case Win32.WM_KEYUP:
case Win32.WM_SYSKEYUP:
pressed = false;
break;
default:
return false;
}
vnc.WriteKeyboardEvent(Convert.ToUInt32(TranslateVirtualKey(virtualKey, modifierKeys)), pressed);
return true;
}
protected void SyncModifierKeyState(KeyboardHook.ModifierKeys modifierKeys)
{
if ((PreviousModifierKeyState & KeyboardHook.ModifierKeys.LeftShift) !=
(modifierKeys & KeyboardHook.ModifierKeys.LeftShift))
vnc.WriteKeyboardEvent(RfbProtocol.XK_Shift_L, (modifierKeys & KeyboardHook.ModifierKeys.LeftShift) != 0);
if ((PreviousModifierKeyState & KeyboardHook.ModifierKeys.RightShift) !=
(modifierKeys & KeyboardHook.ModifierKeys.RightShift))
vnc.WriteKeyboardEvent(RfbProtocol.XK_Shift_R, (modifierKeys & KeyboardHook.ModifierKeys.RightShift) != 0);
if ((PreviousModifierKeyState & KeyboardHook.ModifierKeys.LeftControl) !=
(modifierKeys & KeyboardHook.ModifierKeys.LeftControl))
vnc.WriteKeyboardEvent(RfbProtocol.XK_Control_L, (modifierKeys & KeyboardHook.ModifierKeys.LeftControl) != 0);
if ((PreviousModifierKeyState & KeyboardHook.ModifierKeys.RightControl) !=
(modifierKeys & KeyboardHook.ModifierKeys.RightControl))
vnc.WriteKeyboardEvent(RfbProtocol.XK_Control_R, (modifierKeys & KeyboardHook.ModifierKeys.RightControl) != 0);
if ((PreviousModifierKeyState & KeyboardHook.ModifierKeys.LeftAlt) !=
(modifierKeys & KeyboardHook.ModifierKeys.LeftAlt))
vnc.WriteKeyboardEvent(RfbProtocol.XK_Alt_L, (modifierKeys & KeyboardHook.ModifierKeys.LeftAlt) != 0);
if ((PreviousModifierKeyState & KeyboardHook.ModifierKeys.RightAlt) !=
(modifierKeys & KeyboardHook.ModifierKeys.RightAlt))
vnc.WriteKeyboardEvent(RfbProtocol.XK_Alt_R, (modifierKeys & KeyboardHook.ModifierKeys.RightAlt) != 0);
if ((PreviousModifierKeyState & KeyboardHook.ModifierKeys.LeftWin) !=
(modifierKeys & KeyboardHook.ModifierKeys.LeftWin))
vnc.WriteKeyboardEvent(RfbProtocol.XK_Super_L, (modifierKeys & KeyboardHook.ModifierKeys.LeftWin) != 0);
if ((PreviousModifierKeyState & KeyboardHook.ModifierKeys.RightWin) !=
(modifierKeys & KeyboardHook.ModifierKeys.RightWin))
vnc.WriteKeyboardEvent(RfbProtocol.XK_Super_R, (modifierKeys & KeyboardHook.ModifierKeys.RightWin) != 0);
PreviousModifierKeyState = modifierKeys;
}
public static Int32 TranslateVirtualKey(Int32 virtualKey, KeyboardHook.ModifierKeys modifierKeys)
{
if (KeyTranslationTable.ContainsKey(virtualKey))
return KeyTranslationTable[virtualKey];
// Windows sends the uppercase letter when the user presses a hotkey
// like Ctrl-A. ToAscii takes into effect the keyboard layout and
// state of the modifier keys. This will give us the lowercase letter
// unless the user is also pressing Shift.
var keyboardState = new byte[256];
if (!Win32.GetKeyboardState(keyboardState))
throw new Win32Exception(Marshal.GetLastWin32Error());
keyboardState[Win32.VK_CONTROL] = 0;
keyboardState[Win32.VK_LCONTROL] = 0;
keyboardState[Win32.VK_RCONTROL] = 0;
keyboardState[Win32.VK_MENU] = 0;
keyboardState[Win32.VK_LMENU] = 0;
keyboardState[Win32.VK_RMENU] = 0;
keyboardState[Win32.VK_LWIN] = 0;
keyboardState[Win32.VK_RWIN] = 0;
var charResult = new byte[2];
var charCount = Win32.ToAscii(virtualKey, Win32.MapVirtualKey(virtualKey, 0), keyboardState, charResult, 0);
// TODO: This could probably be handled better. For now, we'll just return the last character.
if (charCount > 0) return Convert.ToInt32(charResult[charCount - 1]);
return virtualKey;
}
