text.cpp

VC源代码大全（精华版）

// Text.cpp : Defines the entry point for the application.
//

#include "stdafx.h"
#include "resource.h"
#include	<math.h>
#include	<stdio.h>

#define MAX_LOADSTRING 100
#define	TEXT_FORMAT		(DT_SINGLELINE|DT_VCENTER|DT_CENTER)

#define	PI		3.14159
#define	TWOPI		(2 * PI)

// Global Variables:
HINSTANCE hInst;								// current instance
TCHAR szTitle[MAX_LOADSTRING];								// The title bar text
TCHAR szWindowClass[MAX_LOADSTRING];								// The title bar text

// Foward declarations of functions included in this code module:
ATOM				MyRegisterClass(HINSTANCE hInstance);
BOOL				InitInstance(HINSTANCE, int);
LRESULT CALLBACK	WndProc(HWND, UINT, WPARAM, LPARAM);
LRESULT CALLBACK	About(HWND, UINT, WPARAM, LPARAM);

HFONT CreatePointFont (int nPoints, char *szFace, HDC hdc);
HFONT CreatePointFontIndirect (LOGFONT *lf, HDC hdc);
int GetSizeInPicas (int nPicas, HDC hdc);
void DoJustify (HDC hdc, HWND hWnd);
void DoTabbedText (HDC hdc, HWND hWnd);
int JustifyLine (HDC hdc, char *szText, SIZE & sz, RECT *rc = NULL);
void DoRotateText (HDC hdc, HWND hWnd);
void DoPieChart (HWND hWnd, HDC hdc);

int APIENTRY WinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPSTR     lpCmdLine,
                     int       nCmdShow)
{
 	// TODO: Place code here.
	MSG msg;
	HACCEL hAccelTable;

	// Initialize global strings
	LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
	LoadString(hInstance, IDC_TEXT, szWindowClass, MAX_LOADSTRING);
	MyRegisterClass(hInstance);

	// Perform application initialization:
	if (!InitInstance (hInstance, nCmdShow)) 
	{
		return FALSE;
	}

	hAccelTable = LoadAccelerators(hInstance, (LPCTSTR)IDC_TEXT);

	// Main message loop:
	while (GetMessage(&msg, NULL, 0, 0)) 
	{
		if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg)) 
		{
			TranslateMessage(&msg);
			DispatchMessage(&msg);
		}
	}

	return msg.wParam;
}



//
//  FUNCTION: MyRegisterClass()
//
//  PURPOSE: Registers the window class.
//
//  COMMENTS:
//
//    This function and its usage is only necessary if you want this code
//    to be compatible with Win32 systems prior to the 'RegisterClassEx'
//    function that was added to Windows 95. It is important to call this function
//    so that the application will get 'well formed' small icons associated
//    with it.
//
ATOM MyRegisterClass(HINSTANCE hInstance)
{
	WNDCLASSEX wcex;

	wcex.cbSize = sizeof(WNDCLASSEX); 

	wcex.style			= CS_HREDRAW | CS_VREDRAW;
	wcex.lpfnWndProc	= (WNDPROC)WndProc;
	wcex.cbClsExtra		= 0;
	wcex.cbWndExtra		= 0;
	wcex.hInstance		= hInstance;
	wcex.hIcon			= LoadIcon(hInstance, (LPCTSTR)IDI_TEXT);
	wcex.hCursor		= LoadCursor(NULL, IDC_ARROW);
	wcex.hbrBackground	= (HBRUSH)(COLOR_WINDOW+1);
	wcex.lpszMenuName	= (LPCSTR)IDC_TEXT;
	wcex.lpszClassName	= szWindowClass;
	wcex.hIconSm		= LoadIcon(wcex.hInstance, (LPCTSTR)IDI_SMALL);

	return RegisterClassEx(&wcex);
}

//
//   FUNCTION: InitInstance(HANDLE, int)
//
//   PURPOSE: Saves instance handle and creates main window
//
//   COMMENTS:
//
//        In this function, we save the instance handle in a global variable and
//        create and display the main program window.
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
   HWND hWnd;

   hInst = hInstance; // Store instance handle in our global variable

   hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
      CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);

   if (!hWnd)
   {
      return FALSE;
   }

   ShowWindow(hWnd, nCmdShow);
   UpdateWindow(hWnd);

   return TRUE;
}

//
//  FUNCTION: WndProc(HWND, unsigned, WORD, LONG)
//
//  PURPOSE:  Processes messages for the main window.
//
//  WM_COMMAND	- process the application menu
//  WM_PAINT	- Paint the main window
//  WM_DESTROY	- post a quit message and return
//
//
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
static int nMode = IDM_FILE_CLEAR;
RECT	rc;

	int wmId, wmEvent;
	PAINTSTRUCT ps;
	HDC hdc;

	switch (message) 
	{
		case WM_COMMAND:
			wmId    = LOWORD(wParam); 
			wmEvent = HIWORD(wParam); 
			// Parse the menu selections:
			switch (wmId)
			{
				case IDM_ABOUT:
				   DialogBox(hInst, (LPCTSTR)IDD_ABOUTBOX, hWnd, (DLGPROC)About);
				   break;
				case IDM_EXIT:
				   DestroyWindow(hWnd);
				   break;
				case IDM_TEXT_JUSTIFY:
				case IDM_FILE_CLEAR:
				case IDM_TEXT_TABBED:
				case IDM_FONTS_ROTATE:
				case IDM_TEXT_PIECHART:
					nMode = wmId;
					GetClientRect(hWnd, &rc);
					InvalidateRect (hWnd, &rc, TRUE);
					break;
				default:
				   return DefWindowProc(hWnd, message, wParam, lParam);
			}
			break;
		case WM_PAINT:
			hdc = BeginPaint(hWnd, &ps);
			switch (nMode)
			{
				default:
				case IDM_FILE_CLEAR:
					break;
				case IDM_TEXT_JUSTIFY:
					DoJustify (hdc, hWnd);
					break;
				case IDM_TEXT_TABBED:
					DoTabbedText (hdc, hWnd);
					break;
				case IDM_FONTS_ROTATE:
					DoRotateText (hdc, hWnd);
					break;
				case IDM_TEXT_PIECHART:
					DoPieChart (hWnd, hdc);
					break;
			}
			EndPaint(hWnd, &ps);
			break;
		case WM_DESTROY:
			PostQuitMessage(0);
			break;
		default:
			return DefWindowProc(hWnd, message, wParam, lParam);
   }
   return 0;
}

// Mesage handler for about box.
LRESULT CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
	switch (message)
	{
		case WM_INITDIALOG:
				return TRUE;

		case WM_COMMAND:
			if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL) 
			{
				EndDialog(hDlg, LOWORD(wParam));
				return TRUE;
			}
			break;
	}
    return FALSE;
}

#define TESTSTRING "Now is the time for all good men to come to the aid of their Teletype."
#define TESTSTRING1 "Nowisthetimeforallgoodmento come to the aid of their Teletype."

void DoJustify (HDC hdc, HWND hWnd)
{
HFONT	hFont;
RECT	rcClient;
int		nLineWidth;
char	*szTextOut;
int		nLeftMargin;


	char *szDup = new char [strlen(TESTSTRING) + 1];
	strcpy (szDup, TESTSTRING);
	szTextOut = szDup;

	GetClientRect (hWnd, &rcClient);
	nLineWidth = GetSizeInPicas (120, hdc);
	nLeftMargin = 0;
	hFont = CreatePointFont (120, "Times New Roman", hdc);
	HFONT hOldFont = (HFONT) SelectObject (hdc, hFont);

	MoveToEx (hdc, nLineWidth, 0, NULL);
	LineTo (hdc, nLineWidth, rcClient.bottom);

	RECT rcText;
	rcText.left = nLeftMargin;
	rcText.right = rcText.left + nLineWidth;
	rcText.top = 10;
	rcText.bottom = rcText.top;

	DrawText (hdc, TESTSTRING, strlen (TESTSTRING), &rcText, DT_EDITCONTROL | DT_WORDBREAK | DT_CALCRECT);
	DrawText (hdc, TESTSTRING, strlen (TESTSTRING), &rcText, DT_EDITCONTROL | DT_WORDBREAK);

	rcText.left = nLeftMargin;
	rcText.right = rcText.left + nLineWidth;
	rcText.top = rcText.bottom + 25;
	rcText.bottom = 0;

//	MoveToEx (hdc, rc.right / 2, rc.bottom / 2, NULL);
//	int nError = GDI_ERROR;
//	int nAlign = SetTextAlign (hdc, TA_UPDATECP | TA_CENTER);
	while (*szTextOut)
	{
	SIZE	sz;
	char *s;
	int nFit;
	int nPoints;

		GetTextExtentExPoint (hdc, szTextOut, strlen (szTextOut), nLineWidth, &nFit, NULL, &sz);
		nPoints = sz.cy;		//	sz.cy contains the rectangle height
		char *szLine = new char [nFit + 1];
		memset (szLine, '\0', nFit + 1);
		strncpy (szLine, szTextOut, nFit);
//
//	Two special cases:
//		1. The next character is a space.
//		2. It's the last part of the text
//
		if (strlen (szLine) == strlen (szTextOut))
		{
			TextOut (hdc, nLeftMargin, rcText.top, szLine, strlen (szLine));
			break;
		}
		
		sz.cx = nLineWidth;
		sz.cy = rcText.top;
		if (szTextOut[nFit] == ' ')
		{
			szTextOut += strlen (szLine);
			szTextOut += 1;
		}
		else
		{
			if ((s = strrchr (szLine, ' ')) == NULL)	// No spaces?
			{
				szTextOut += nFit;
			}
			else
			{
				*s = '\0';
				szTextOut += strlen (szLine);
				++szTextOut;
			}
		}
//		rcText.top = nPos;
		rcText.bottom = rcText.top + nPoints;
		JustifyLine (hdc, szLine, sz, &rcText);
		delete [] szLine;
		rcText.top += nPoints;
	}
	SelectObject (hdc, hOldFont);
	DeleteObject (hFont);
	delete [] szDup;
}

BOOL JustifyLine (HDC hdc, char *szText, SIZE & sz, RECT *rc)
{
char	*s;
int		nSpaces;
int		nWidth;

	nWidth = sz.cx;
	s = szText;
	nSpaces = 0;
	while (*s)