天龙源码分析 - cegui 中文输入

最新推荐文章于 2021-10-27 21:48:21 发布

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最新推荐文章于 2021-10-27 21:48:21 发布

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本文详细介绍了Windows环境下输入框和编辑框如何处理英文、中文和其他特殊字符输入，包括字符转换、复制粘贴操作、键盘快捷键应用以及中文输入法的集成与操作。

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一普遍字符输入

case WM_CHAR:
     WCHAR szCharW;
     CHAR szChar = (CHAR)LOWORD(wParam);
     if(szChar >= 32 && szChar <= 128 )
     {
      ::MultiByteToWideChar(CP_ACP, 0, (LPCSTR)&szChar, 1, &szCharW, 1);

      //AxTrace(0, 1, "Char:%02X", szCharW);
      CEGUI::System::getSingleton().injectChar((CEGUI::utf32)szCharW);
     }

二中文输入

        case WM_IME_COMPOSITION:
            OutputDebugStringW( L"WM_IME_COMPOSITION\n" );
            {
                LONG lRet;  // Returned count in CHARACTERS
                WCHAR wszCompStr[MAX_COMPSTRING_SIZE];
                bool bRet = false;

                //*trapped = true;
                if( NULL == ( hImc = _ImmGetContext( GetHWND() ) ) )
                {
                    break;
                }

                if ( lParam & GCS_RESULTSTR )
                {
                    OutputDebugStringW( L"  GCS_RESULTSTR\n" );
                    lRet = _ImmGetCompositionStringW( hImc, GCS_RESULTSTR, wszCompStr, sizeof( wszCompStr ) );
                    if( lRet > 0 )
                    {
                        lRet /= sizeof(WCHAR);
                        wszCompStr[lRet] = 0;  // Force terminate
                        for(int i = 0; i <lRet; ++i )
                        {
                            //AxTrace(0, 0, "Result:%02X", (WCHAR)wszCompStr[i]);
                            CEGUI::System::getSingleton().injectChar((WCHAR)wszCompStr[i]);
                        }
                    }
                    bRet = true;
                }

                _ImmReleaseContext( GetHWND(), hImc );

                // Adjust Ime Window Pos. [4/21/2006]
                //SetImeWindowPos();
                return bRet;
            }

三特殊字符输入

        case WM_KEYDOWN:
            {
                switch ( wParam )
                {
                case VK_SHIFT:
                    CEGUI::System::getSingleton().injectKeyDown(CEGUI::Key::LeftShift);
                    break;

                case VK_CONTROL:
                    CEGUI::System::getSingleton().injectKeyDown(CEGUI::Key::LeftControl);
                    break;

                case VK_DELETE:
                    CEGUI::System::getSingleton().injectKeyDown(CEGUI::Key::Delete);
                    break;

                case VK_LEFT:
                    CEGUI::System::getSingleton().injectKeyDown(CEGUI::Key::ArrowLeft);
                    break;

                case VK_RIGHT:
                    CEGUI::System::getSingleton().injectKeyDown(CEGUI::Key::ArrowRight);
                    break;

                case VK_UP:
                    CEGUI::System::getSingleton().injectKeyDown(CEGUI::Key::ArrowUp);
                    break;

                case VK_DOWN:
                    CEGUI::System::getSingleton().injectKeyDown(CEGUI::Key::ArrowDown);
                    break;

                case VK_HOME:
                    CEGUI::System::getSingleton().injectKeyDown(CEGUI::Key::Home);
                    break;

                case VK_END:
                    CEGUI::System::getSingleton().injectKeyDown(CEGUI::Key::End);
                    break;
                }
            }
            break;

四复制/粘贴

            case VK_CANCEL: // Ctrl-C Copy
            case 24:        // Ctrl-X Cut
                {
                    CEGUI::EditboxInterface* pEdit = GetActiveIMEEditBox_Interface();
                    if(pEdit)
                    {
                        if(0 != pEdit->getSelectionLength() && !(pEdit->isTextMasked()))
                        {
                            //utf32 selection string
                            CEGUI::String32 szSel = (GetActiveIMEEditBox())->getText().substr(pEdit->getSelectionStartIndex(), pEdit->getSelectionLength());

                            size_t length = szSel.length();
                            if(length > 0)
                            {
                                size_t pos = 0;
                                wchar_t* pWtxt = new wchar_t[length+1];
                                pWtxt[length] = 0;
                                //utf32 -> utf16
                                while(length--)
                                {
                                    pWtxt[pos] = szSel.at(pos) & 0xFFFF;
                                    pos++;
                                }

                                //paste to clipboard
                                if(::OpenClipboard(::GetTopWindow(NULL)))
                                {
                                    ::EmptyClipboard();

                                    int size = ::WideCharToMultiByte(CP_ACP,0,pWtxt,wcslen(pWtxt),NULL,0,NULL,FALSE);
                                    //alloc mem
                                    HGLOBAL hglb = ::GlobalAlloc(GMEM_MOVEABLE,(size_t)size+1);
                                    char* ptxt = (char*)::GlobalLock(hglb);
                                    ptxt[size] = 0;
                                    //utf16 -> ansi char
                                    ::WideCharToMultiByte(CP_ACP,0,pWtxt,wcslen(pWtxt),ptxt,size,NULL,FALSE);
                                    ::GlobalUnlock(hglb);
                                    //copy to clipboard
                                    ::SetClipboardData(CF_TEXT, hglb);
                                    ::CloseClipboard();
                                    //free mem
                                    ::GlobalFree(hglb);
                                }

                                delete [] pWtxt;

                                if((WCHAR)wParam == 24) /*Ctrl-X need clear selection*/
                                {
                                    CEGUI::System::getSingleton().injectKeyDown(CEGUI::Key::Delete);
                                }
                            }//end of if(length > 0)
                        }
                    }// end of if(pWin)
                }
                break;

            // Ctrl-V Paste
            case 22:
                {
                    CEGUI::EditboxInterface* pWin = GetActiveIMEEditBox_Interface();
                    if(pWin)
                    {
                        if(::IsClipboardFormatAvailable(CF_TEXT) && ::OpenClipboard(::GetTopWindow(NULL)))
                        {
                            HGLOBAL hglb = ::GetClipboardData(CF_TEXT);
                            if(NULL != hglb)
                            {
                                char* ptxt = (char*)::GlobalLock(hglb);

                                int size = ::MultiByteToWideChar(CP_ACP,0,ptxt,(int)strlen(ptxt),NULL,0);
                                wchar_t* pWtxt = new wchar_t[size+1];
                                pWtxt[size] = 0;

                                ::MultiByteToWideChar(CP_ACP,0,ptxt,(int)strlen(ptxt),pWtxt,size);

                                ::GlobalUnlock(hglb);
                                ::CloseClipboard();

                                int pos = 0;
                                while(size--)
                                {
                                    CEGUI::System::getSingleton().injectChar((CEGUI::utf32)pWtxt[pos]);
                                    pos++;
                                }
                            }// end of if(NULL != hglb)
                        }
                    }// end of if(pWin)
                }
                break;

五输入框定位

void SetImeWindowPos(void)
{
    //Set Ime Wnd Position.
    CEGUI::EditboxInterface* pEdit = GetActiveIMEEditBox_Interface();
    if(NULL == pEdit) return;

    CEGUI::Window* pWnd = GetActiveIMEEditBox();
    if(NULL == pWnd) return;

    CEGUI::Rect ceguiRect = pEdit->getCaratTextExtent();
    if(ceguiRect.getWidth() < 0.01f && ceguiRect.getHeight() < 0.01f) return;

    POINT pt;
    pt.x = (long)ceguiRect.d_left;
    //pt.y = (long)ceguiRect.d_bottom;
    pt.y = (long)ceguiRect.d_top;

    HIMC hImc = _ImmGetContext(GetHWND());
    if(NULL == hImc) return;

    COMPOSITIONFORM imeForm;
    imeForm.dwStyle = CFS_POINT;
    imeForm.ptCurrentPos = pt;

    _ImmSetCompositionWindow(hImc,&imeForm);
    _ImmReleaseContext(GetHWND(),hImc);
}