private void ClearContext()
{
if (_hwndSource == null)
{
return;
}
ImeNative.ImmAssociateContext(_hwndSource.Handle, _previousContext);
ImeNative.ImmReleaseContext(_defaultImeWnd, _currentContext);
_currentContext = IntPtr.Zero;
_defaultImeWnd = IntPtr.Zero;
_hwndSource.RemoveHook(WndProc);
_hwndSource = null;
}
private void CreateContext()
{
_hwndSource = (HwndSource)PresentationSource.FromVisual(_textArea);
if (_hwndSource == null)
{
return;
}
_defaultImeWnd = ImeNative.ImmGetDefaultIMEWnd(IntPtr.Zero);
_currentContext = ImeNative.ImmGetContext(_defaultImeWnd);
_previousContext = ImeNative.ImmAssociateContext(_hwndSource.Handle, _currentContext);
_hwndSource.AddHook(WndProc);
//尽管文档说传递null是无效的，但这似乎有助于在与WPF共享的默认输入上下文中激活IME
var threadMgr = ImeNative.GetTextFrameworkThreadManager();
threadMgr?.SetFocus(IntPtr.Zero);
}