自学教程：C++ DrawTextW函数代码示例

void  ex_trace_scrn(int x, int y, char* _msg){#ifdef _WIN32		HDC hDC = GetDC(NULL);		RECT  rtScreen;		SetRectEmpty(&rtScreen);				SetTextColor(hDC, 0x00ff0000);		SetBkColor(hDC, 0x00FF00FF);		#if defined(UNICODE) || defined(_UNICODE)		wchar_t uni_msg[128];		memset(uni_msg, 0, sizeof(uni_msg));		ex_char2uni(_msg, uni_msg, Ex_MIDOF(uni_msg) );		DrawTextW(hDC, uni_msg, wcslen(uni_msg) , &rtScreen, DT_CALCRECT );		OffsetRect(&rtScreen, x, y );		DrawTextW(hDC, uni_msg, wcslen(uni_msg) , &rtScreen, DT_LEFT|DT_TOP );		#else		DrawTextA(hDC, _msg, strlen(_msg) , &rtScreen, DT_CALCRECT );		OffsetRect(&rtScreen, x, y );		DrawTextA(hDC, _msg, strlen(_msg) , &rtScreen, DT_LEFT|DT_TOP );		#endif	ReleaseDC(NULL, hDC);#endif}

// *********************************************************************// 					DrawLabel()										// *********************************************************************void GdiLabelDrawer::DrawLabel(CLabelOptions* options, CLabelInfo* lbl, CRect& rect, double angleRad, double piX, double piY){	// ------------------------------------------------------	//	GDI drawing w/o transparency, gradients, etc	// ------------------------------------------------------	XFORM xForm;	xForm.eM11 = (FLOAT)cos(angleRad);	xForm.eM12 = (FLOAT)sin(angleRad);	xForm.eM21 = (FLOAT)-sin(angleRad);	xForm.eM22 = (FLOAT)cos(angleRad);	xForm.eDx = (FLOAT)piX;	xForm.eDy = (FLOAT)piY;	_dc->SetWorldTransform(&xForm);	CPen* oldPen = NULL;	// drawing frame	if (options->frameVisible)	{		oldPen = _dc->SelectObject(&_penFrameOutline);		DrawFrame(&rect, options);		_dc->SelectObject(oldPen);	}	// drawing outlines	if (options->shadowVisible)	{		_dc->SetWindowOrg(-options->shadowOffsetX, -options->shadowOffsetY);		_dc->SetTextColor(options->shadowColor);		DrawTextW(_dc->m_hDC, lbl->text, -1, rect, _alignment);		_dc->SetTextColor(options->fontColor);		_dc->SetWindowOrg(0, 0);	}	if (options->haloVisible)	{		_dc->BeginPath();		DrawTextW(_dc->m_hDC, lbl->text, -1, rect, _alignment);		_dc->EndPath();		oldPen = _dc->SelectObject(&_penHalo);		_dc->StrokePath();		_dc->SelectObject(oldPen);	}	if (options->fontOutlineVisible)	{		_dc->BeginPath();		DrawTextW(_dc->m_hDC, lbl->text, -1, rect, _alignment);		_dc->EndPath();		oldPen = _dc->SelectObject(&_penFontOutline);		_dc->StrokePath();		_dc->SelectObject(oldPen);	}	DrawTextW(_dc->m_hDC, lbl->text, -1, rect, _alignment);}

static WINUSERAPI int WINAPI DrawTextUW(HDC hDC, LPCSTR lpchText, int nCount, LPRECT lpRect, UINT uFormat){    if (!lpchText)    {        // String not specified. Don't bother converting anything.        return DrawTextW(hDC, (LPCWSTR)lpchText, nCount, lpRect, uFormat);    }    // Convert lpchText from UTF-8 to UTF-16.    wchar_t *lpchwText = w32u_UTF8toUTF16(lpchText);    int ret = DrawTextW(hDC, lpchwText, nCount, lpRect, uFormat);    free(lpchwText);    return ret;}

static void LLabel_OnPaint(HWND hwnd){	PAINTSTRUCT		ps;	RECT			rc;	int				state;	HFONT			hFont;	int				style = DT_SINGLELINE | DT_VCENTER;	BeginPaint(hwnd, &ps);	GetClientRect(hwnd, &rc);	state = SaveDC(ps.hdc);	SetBkMode(ps.hdc, TRANSPARENT);	hFont = CreateFontIndirectW((LPLOGFONTW)GetWindowLongPtrW(hwnd, 4));	SelectFont(ps.hdc, hFont);	SetTextColor(ps.hdc, RGB(0, 0, 255));	if(IsWindowUnicode(hwnd)){		if(GetPropW(hwnd, LL_ALIGNW))			style |= DT_RIGHT;		else			style |= DT_LEFT;		DrawTextW(ps.hdc, (wchar_t *)GetWindowLongPtrW(hwnd, 0), -1, &rc, style);	}	else{		if(GetProp(hwnd, LL_ALIGN))			style |= DT_RIGHT;		else			style |= DT_LEFT;		DrawText(ps.hdc, (char *)GetWindowLongPtr(hwnd, 0), -1, &rc, style);	}	RestoreDC(ps.hdc, state);	DeleteFont(hFont);	EndPaint(hwnd, &ps);}

void Lexem::calc(HDC hdc, double multiplier){  if (width * height == 0)  {    HFONT hf = winWrap::setFont(hdc, FONT_SIZE * multiplier);    RECT r;    DrawTextW(hdc, name.data(), name.length(), &r, DT_CALCRECT);    width = r.right - r.left;    height = r.bottom - r.top;    DeleteObject(hf);    int scr_w = 0, h = 0;    if (supscript != NULL)    {      supscript->calc(hdc, multiplier * SCRIPT_SIZE);      scr_w = supscript->getWidth();      h = height / 2;    }    if (subscript != NULL)    {      subscript->calc(hdc, multiplier * SCRIPT_SIZE);      scr_w = max(scr_w, subscript->getWidth());      h += height / 2;    }    width += scr_w;    height += getSubScriptHeight() + getSuperScriptHeight() - h;  }}

voiddialog_paint_motd(HDC hDC){    HANDLE hFont;    CHAR date_line[64];    RECT r = { 300, 90, 565, 330 };    // invalid month    if (motd.month < 1 || motd.month > 12)        return;    SetBkMode(hDC, TRANSPARENT);    // title    hFont = CreateFont(16, 0, 0, 0, FW_BOLD, FALSE, TRUE, FALSE, DEFAULT_CHARSET, OUT_OUTLINE_PRECIS,                CLIP_DEFAULT_PRECIS, CLEARTYPE_QUALITY, VARIABLE_PITCH, TEXT("Tahoma"));    SelectObject(hDC, hFont);    sprintf_s(date_line, sizeof(date_line), "%d %s %d", motd.day, month_names[motd.month-1], motd.year);    DrawText(hDC, date_line, -1, &r, DT_WORDBREAK);    r.top = 115;    // text    hFont = CreateFont(16, 0, 0, 0, FW_DONTCARE, FALSE, FALSE, FALSE, DEFAULT_CHARSET, OUT_OUTLINE_PRECIS,                CLIP_DEFAULT_PRECIS, CLEARTYPE_QUALITY, VARIABLE_PITCH, TEXT("Tahoma"));    SelectObject(hDC, hFont);    DrawTextW(hDC, motd.text, -1, &r, DT_WORDBREAK);}

LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam){	HDC         hdc;	PAINTSTRUCT ps;	RECT        rect;	switch (message)	{	case WM_CREATE:		PlaySoundW(L"hellowin.wav", NULL, SND_FILENAME | SND_ASYNC);		return 0;	case WM_PAINT:		hdc = BeginPaint(hwnd, &ps);		GetClientRect(hwnd, &rect);		DrawTextW(hdc, L"Hello, Windows 98!汉字", -1, &rect,			DT_SINGLELINE | DT_CENTER | DT_VCENTER);		EndPaint(hwnd, &ps);		return 0;	case WM_DESTROY:		PostQuitMessage(0);		return 0;	}	return DefWindowProc(hwnd, message, wParam, lParam);}

    SIZE sizeWithText(const wchar_t * pszText, int nLen, DWORD dwFmt, LONG nWidthLimit)    {        SIZE tRet = {0};        do         {            CC_BREAK_IF(! pszText || nLen <= 0);            RECT rc = {0, 0, 0, 0};            DWORD dwCalcFmt = DT_CALCRECT;            if (nWidthLimit > 0)            {                rc.right = nWidthLimit;                dwCalcFmt |= DT_WORDBREAK                    | (dwFmt & DT_CENTER)                    | (dwFmt & DT_RIGHT);            }            // use current font to measure text extent            HGDIOBJ hOld = SelectObject(_DC, _font);            // measure text size            DrawTextW(_DC, pszText, nLen, &rc, dwCalcFmt);            SelectObject(_DC, hOld);            tRet.cx = rc.right;            tRet.cy = rc.bottom;        } while (0);        return tRet;    }

void OnPaint(HWND hWnd){   HDC dialogDC;   PAINTSTRUCT paint;   RECT cRC, textRC;   int i;   HBRUSH hBrush;   HPEN hPen;   HFONT dcFont;   COLORREF cr;   int nch = GetWindowTextW(windowList[selectedWindow], windowText, 1023);   dialogDC = BeginPaint(hWnd, &paint);   {      GetClientRect(hWnd, &cRC);      FillRect(dialogDC, &cRC, GetSysColorBrush(COLOR_MENU));      for(i=0; i< windowCount; i++)      {         HICON hIcon = iconList[i];                  int xpos = xOffset + 40 * (i % nCols);         int ypos = yOffset + 40 * (i / nCols);         if (selectedWindow == i)         {            hBrush = GetSysColorBrush(COLOR_HIGHLIGHT);         }         else         {            hBrush = GetSysColorBrush(COLOR_MENU);         }#if TRUE         cr = GetSysColor(COLOR_BTNTEXT); // doesn't look right! >_<         hPen = CreatePen(PS_DOT, 1, cr);         SelectObject(dialogDC, hPen);         SelectObject(dialogDC, hBrush);         Rectangle(dialogDC, xpos-2, ypos-2, xpos+32+2, ypos+32+2);         DeleteObject(hPen);         // Must NOT destroy the system brush!#else         RECT rc = { xpos-2, ypos-2, xpos+32+2, ypos+32+2 };         FillRect(dialogDC, &rc, hBrush);#endif         DrawIcon(dialogDC, xpos, ypos, hIcon);      }      dcFont = SelectObject(dialogDC, dialogFont);      SetTextColor(dialogDC, GetSysColor(COLOR_BTNTEXT));      SetBkColor(dialogDC, GetSysColor(COLOR_BTNFACE));      textRC.top = itemsH;      textRC.left = 8;      textRC.right = totalW - 8;      textRC.bottom = totalH - 8;      DrawTextW(dialogDC, windowText, nch, &textRC, DT_CENTER|DT_END_ELLIPSIS);      SelectObject(dialogDC, dcFont);   }   EndPaint(hWnd, &paint);}

static void draw_launchers( HDC hdc, RECT update_rect ){    COLORREF color = SetTextColor( hdc, RGB(255,255,255) ); /* FIXME: depends on background color */    int mode = SetBkMode( hdc, TRANSPARENT );    unsigned int i;    LOGFONTW lf;    HFONT font;    SystemParametersInfoW( SPI_GETICONTITLELOGFONT, sizeof(lf), &lf, 0 );    font = SelectObject( hdc, CreateFontIndirectW( &lf ) );    for (i = 0; i < nb_launchers; i++)    {        RECT dummy, icon = get_icon_rect( i ), title = get_title_rect( i );        if (IntersectRect( &dummy, &icon, &update_rect ))            DrawIconEx( hdc, icon.left, icon.top, launchers[i]->icon, icon_cx, icon_cy,                        0, 0, DI_DEFAULTSIZE|DI_NORMAL );        if (IntersectRect( &dummy, &title, &update_rect ))            DrawTextW( hdc, launchers[i]->title, -1, &title,                       DT_CENTER|DT_WORDBREAK|DT_EDITCONTROL|DT_END_ELLIPSIS );    }    SelectObject( hdc, font );    SetTextColor( hdc, color );    SetBkMode( hdc, mode );}

/*********************************************************************** * DrawShadowText [[email
C++ DrawTexture函数代码示例
C++ DrawText函数代码示例