printpreviewdlg.cpp

C++编程实践与技巧一书各章节的源码

// printpreviewDlg.cpp : implementation file
//

#include "stdafx.h"
#include "printpreview.h"
#include "printpreviewDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CAboutDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CPrintpreviewDlg dialog

CPrintpreviewDlg::CPrintpreviewDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CPrintpreviewDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CPrintpreviewDlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CPrintpreviewDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CPrintpreviewDlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CPrintpreviewDlg, CDialog)
	//{{AFX_MSG_MAP(CPrintpreviewDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CPrintpreviewDlg message handlers

BOOL CPrintpreviewDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	// TODO: Add extra initialization here
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CPrintpreviewDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CPrintpreviewDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CPrintpreviewDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CPrintpreviewDlg::OnButton1() 
{
// TODO: Add your control notification handler code here
//
//
// Design and implementation [e-mail] 
// 13 Jan 2000 15:14
//

CString strWords;

// This is a rectangle control
CWnd* pWnd = GetDlgItem(IDC_STATIC_PREVIEW); 

CDC* dc;
CDC memoriDC;
CBitmap memBMP;
CBitmap* pOldBMP;
CFont fnt;
CFont* pOldFnt;
CRect rect;
CRect rectMemory;
CSize zMetrix;

//
//
//
CPrintDialog pdlg(FALSE);
DOCINFO di;
CDC prnDC;

di.cbSize = sizeof(DOCINFO);
di.lpszDocName = "This string will appear in PrinterQueue";
di.lpszOutput = NULL;     
di.lpszDatatype = NULL;
di.fwType = 0;

//
// Get current printer setting
//
pdlg.GetDefaults();


//
dc = pWnd->GetDC();
pWnd->GetClientRect(&rect);

// DC printer???
if( !prnDC.Attach(pdlg.GetPrinterDC()) )
AfxMessageBox("Invalid Printer DC");
memoriDC.CreateCompatibleDC(&prnDC); // Create DC for

//
// Get the resolution of Screen and Current DefaultPrinter
//
int iPrnX = prnDC.GetDeviceCaps(HORZRES);
int iPrnY = prnDC.GetDeviceCaps(VERTRES);
int iMonX = dc->GetDeviceCaps(HORZRES); // DeviceTarget is Monitor
int iMonY = dc->GetDeviceCaps(VERTRES);


rectMemory.top = 0;
rectMemory.left = 0;
rectMemory.bottom = iPrnY;
rectMemory.right = iPrnX;

//
// Create a Memory Bitmap that is compatible with thePrinter DC
// then select or make the bitmap as current GDIactive object
//
memBMP.CreateCompatibleBitmap(&prnDC,
rectMemory.Width(), rectMemory.Height());
pOldBMP = memoriDC.SelectObject(&memBMP);

//
// Clear memory DC or in other words
// paint the bitmap with white colour and transparent text
//
memoriDC.SetBkMode(TRANSPARENT);
memoriDC.SetTextColor(RGB(0, 0, 0));
memoriDC.PatBlt(0, 0, rectMemory.Width(),
rectMemory.Height(), WHITENESS);

//
// Prepare the font
//
int iPointz = 100;
fnt.CreatePointFont(iPointz, "OCR A", &memoriDC);
strWords.Format("This is line number    ");        //Test string
pOldFnt = memoriDC.SelectObject(&fnt);
zMetrix = memoriDC.GetTextExtent(strWords);
int iPos = 0;

//
// Write string or Paint something
//
int iMaksimal = 0;
int iLineHeight = 1;
int iLoop;
CString strPuncak;

//
// Calculate how many lines we could fit
//
for(iLoop = 1; iLoop < 100; iLoop++)
{
if( ((zMetrix.cy+iLineHeight)*iLoop) < iPrnY )
iMaksimal++;
}

strPuncak.Format("Maximum Amount of line(s) for %dpoints are %d lines", iPointz, iMaksimal);

//
//
//
for(iLoop = 0; iLoop < iMaksimal; iLoop++)
{
strWords.Format("This is line %d", iLoop);
memoriDC.TextOut(0, iLoop*(zMetrix.cy+iLineHeight),
strWords);
}

//
// Reseting font
//
memoriDC.SelectObject(pOldFnt);

//
// Calculate ratio
//
float fXRatio = (float) iMonX/iPrnX;
float fYRatio = (float) iMonY/iPrnY;


//  iLebar = Width
//  iTinggi = Height
//  iXPosisiPreview = horisontal location of preview
//  iYPosisiPreview = vertical location of preview
//
int iLebar = rect.Width()*fXRatio;
int iTinggi = rect.Height()*fYRatio;
int iXPosisiPreview = (rect.Width() - iLebar)/2;
int iYPosisiPreview = (rect.Height() - iTinggi)/2;
CPen pen(PS_SOLID, 2, RGB(255, 0, 0));
CPen* pOldPen;

//
// Create an outline
// 
pOldPen = dc->SelectObject(&pen);
dc->Rectangle(iXPosisiPreview, iYPosisiPreview ,
iXPosisiPreview + iLebar + 2 , iYPosisiPreview +
iTinggi + 2);
dc->SelectObject(pOldPen);

//
// Put in the box
//
dc->StretchBlt(iXPosisiPreview , iYPosisiPreview ,
iLebar, iTinggi,
&memoriDC, 0, 0, rectMemory.Width(),
rectMemory.Height(), SRCCOPY);

//
// Cleaning Up
//
fnt.DeleteObject();
memoriDC.SelectObject(pOldBMP);
memoriDC.DeleteDC();
memBMP.DeleteObject();
prnDC.Detach();

//
pWnd->ReleaseDC(dc);
	
}