Richedit控件.docx

关于windowless的rich edit：1.看了一个介绍：个人猜测就是首先要写一个类，来实现ITextHost这个接口，同个这个类来把宿主窗口和无窗口的richedit联系起来。然后调用CreateTextServices，传入ITextHost指针，返回IUnknown指针。通过这个IUnown接口，可以查询到ITextServices和ITextDocument接口。最后通过这两个接口完成绝大多数功能。一般来说是无法直接通过调用接口的方式来获取无窗口RichEdit所处的HostWindow的，但是可以利用ITextHost的一些函数配合Win32API来得到HostWindow的窗口句柄比如：ITextHost *pHost;/此处可以通过ITextServices的QueryInterface得到ITextHost的指针然后调用pHost-TxSetCapture(TRUE)让窗口捕获鼠标，巧妙地地方就在这里，这时候你只要调用普通的Win32API:GetCapture()就可以得到HostWindow的窗口句柄了。注意获取完窗口句柄后要调用TxSetCapture(FALSE)释放鼠标。*#include textserv.h#define FValidCF(_pcf) (_pcf)-cbSize = sizeof(CHARFORMAT)#define FValidPF(_ppf) (_ppf)-cbSize = sizeof(PARAFORMAT)typedef void (* PNOTIFY_CALL)(int iNotify);#define HOST_BORDER 5#define LY_PER_INCH 1440EXTERN_C const IID IID_ITextEditControl;/* TXTEFFECT enumDefines different background styles control*/enum TXTEFFECT TXTEFFECT_NONE = 0,/ememno special backgoround effectTXTEFFECT_SUNKEN,/ememdraw a sunken 3-D look;interface ITextEditControl : public IUnknownvirtual LRESULTTxWindowProc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam) = 0;class MyTextHost :public ITextHostpublic:/ -/IUnknown interface/ -virtual HRESULT _stdcall QueryInterface(REFIID riid, void *ppvObject);virtual ULONG _stdcall AddRef(void);virtual ULONG _stdcall Release(void);/ -MyTextHost();MyTextHost();BOOL Init(HWND h_wnd, const CREATESTRUCT *pcs, PNOTIFY_CALL p_nc);/cmember Get the DC for the host HDC TxGetDC();/cmember Release the DC gotten from the host INTTxReleaseDC(HDC hdc);/cmember Show the scroll bar BOOL TxShowScrollBar(INT fnBar, BOOL fShow);/cmember Enable the scroll bar BOOL TxEnableScrollBar (INT fuSBFlags, INT fuArrowflags);/cmember Set the scroll range BOOL TxSetScrollRange(INT fnBar,LONG nMinPos,INT nMaxPos,BOOL fRedraw);/cmember Set the scroll position BOOL TxSetScrollPos (INT fnBar, INT nPos, BOOL fRedraw);/cmember InvalidateRect voidTxInvalidateRect(LPCRECT prc, BOOL fMode);/cmember Send a WM_PAINT to the window void TxViewChange(BOOL fUpdate);/cmember Create the caret BOOLTxCreateCaret(HBITMAP hbmp, INT xWidth, INT yHeight);/cmember Show the caret BOOLTxShowCaret(BOOL fShow);/cmember Set the caret position BOOLTxSetCaretPos(INT x, INT y);/cmember Create a timer with the specified timeout BOOL TxSetTimer(UINT idTimer, UINT uTimeout);/cmember Destroy a timer void TxKillTimer(UINT idTimer);/cmember Scroll the content of the specified windows client area voidTxScrollWindowEx (INT dx,INT dy,LPCRECT lprcScroll,LPCRECT lprcClip,HRGN hrgnUpdate,LPRECT lprcUpdate,UINT fuScroll);/cmember Get mouse capture voidTxSetCapture(BOOL fCapture);/cmember Set the focus to the text window voidTxSetFocus();/cmember Establish a new cursor shape void TxSetCursor(HCURSOR hcur, BOOL fText);/cmember Converts screen coordinates of a specified point to the client coordinates BOOL TxScreenToClient (LPPOINT lppt);/cmember Converts the client coordinates of a specified point to screen coordinates BOOLTxClientToScreen (LPPOINT lppt);/cmember Request host to activate text services HRESULTTxActivate( LONG * plOldState );/cmember Request host to deactivate text services HRESULTTxDeactivate( LONG lNewState );/cmember Retrieves the coordinates of a windows client area HRESULTTxGetClientRect(LPRECT prc);/cmember Get the view rectangle relative to the inset HRESULTTxGetViewInset(LPRECT prc);/cmember Get the default character format for the text HRESULT TxGetCharFormat(const CHARFORMATW *ppCF );/cmember Get the default paragraph format for the text HRESULTTxGetParaFormat(const PARAFORMAT *ppPF);/cmember Get the background color for the window COLORREFTxGetSysColor(int nIndex);/cmember Get the background (either opaque or transparent) HRESULTTxGetBackStyle(TXTBACKSTYLE *pstyle);/cmember Get the maximum length for the text HRESULTTxGetMaxLength(DWORD *plength);/cmember Get the bits representing requested scroll bars for the window HRESULTTxGetScrollBars(DWORD *pdwScrollBar);/cmember Get the character to display for password input HRESULTTxGetPasswordChar(TCHAR *pch);/cmember Get the accelerator character HRESULTTxGetAcceleratorPos(LONG *pcp);/cmember Get the native size HRESULTTxGetExtent(LPSIZEL lpExtent);/cmember Notify host that default character format has changed HRESULT OnTxCharFormatChange (const CHARFORMATW * pcf);/cmember Notify host that default paragraph format has changed HRESULTOnTxParaFormatChange (const PARAFORMAT * ppf);/cmember Bulk access to bit properties HRESULTTxGetPropertyBits(DWORD dwMask, DWORD *pdwBits);/cmember Notify host of events HRESULTTxNotify(DWORD iNotify, void *pv);/ Far East Methods for getting the Input Context/#ifdef WIN95_IME HIMCTxImmGetContext(); vo