private void IMEChangeCandidate()
{
uint length = IMM.ImmGetCandidateList(_context, 0, IntPtr.Zero, 0);
if (length > 0)
{
IntPtr pointer = Marshal.AllocHGlobal((int)length);
length = IMM.ImmGetCandidateList(_context, 0, pointer, length);
IMM.CandidateList cList =
(IMM.CandidateList)Marshal.PtrToStructure(pointer, typeof(IMM.CandidateList));
CandidatesSelection = cList.dwSelection;
CandidatesPageStart = cList.dwPageStart;
CandidatesPageSize = cList.dwPageSize;
if (cList.dwCount > 1)
{
Candidates = new string[cList.dwCount];
for (int i = 0; i < cList.dwCount; i++)
{
int sOffset = Marshal.ReadInt32(pointer, 24 + 4 * i);
Candidates[i] = Marshal.PtrToStringUni((IntPtr)(pointer.ToInt32() + sOffset));
}
if (onCandidatesReceived != null)
{
onCandidatesReceived(this, EventArgs.Empty);
}
}
else
{
IMECloseCandidate();
}
Marshal.FreeHGlobal(pointer);
}
}
private void IMESetContext(ref Message msg)
{
if (msg.WParam.ToInt32() == 1)
{
IntPtr ptr = IMM.ImmGetContext(Handle);
if (_context == IntPtr.Zero)
{
_context = ptr;
}
else if (ptr == IntPtr.Zero && IsEnabled)
{
enableIME();
}
_compcurpos.IMEHandle = _context;
_compstr.IMEHandle = _context;
_compclause.IMEHandle = _context;
_compattr.IMEHandle = _context;
_compread.IMEHandle = _context;
_compreadclause.IMEHandle = _context;
_compreadattr.IMEHandle = _context;
_resstr.IMEHandle = _context;
_resclause.IMEHandle = _context;
_resread.IMEHandle = _context;
_resreadclause.IMEHandle = _context;
if (!_showIMEWin)
{
msg.LParam = (IntPtr)0;
}
}
}
internal override void Update()
{
Length = IMM.ImmGetCompositionString(IMEHandle, Flag, IntPtr.Zero, 0);
IntPtr pointer = Marshal.AllocHGlobal(Length);
try {
IMM.ImmGetCompositionString(IMEHandle, Flag, pointer, Length);
_values = new byte[Length];
Marshal.Copy(pointer, _values, 0, Length);
} finally {
Marshal.FreeHGlobal(pointer);
}
}
public bool PreFilterMessage(ref Message m)
{
switch (m.Msg)
{
case IMM.KeyDown:
IntPtr intPtr = Marshal.AllocHGlobal(Marshal.SizeOf(m));
Marshal.StructureToPtr(m, intPtr, true);
IMM.TranslateMessage(intPtr);
return(false);
case 0x020A:
// Mouse wheel is not correct if the IME helper is used, thus it is needed to grab the value here.
MouseWheel += (int)(short)((uint)(int)m.WParam >> 16);
return(false);
}
return(false);
}
internal override void Update()
{
Value = IMM.ImmGetCompositionString(IMEHandle, Flag, IntPtr.Zero, 0);
}
/// <summary>
/// Disable the IME
/// </summary>
public void disableIME()
{
IsEnabled = false;
IMM.ImmAssociateContext(Handle, IntPtr.Zero);
}
/// <summary>
/// Enable the IME
/// </summary>
public void enableIME()
{
IsEnabled = true;
IMM.ImmAssociateContext(Handle, _context);
}