对话框下的直接打印和打印预览

 由于很多情况下无法利用文档/视图框架，需要自定义打印，一般方法有用API的，比较麻烦些。本文的方法主要基于MFC,在对话框内自定义了打印，调试运行良好，先将实现方法列出。

定义三个类CWooPrintFrmWnd，CWooPrintView，CWooPreviewView。代码如下，重点是CWooPreviewView中要定义好装订线距离，页数，页头，页尾等参数，以灵活实现多页打印、多字体图元打印。

 

#if !defined(AFX_WOOPRINTFRMWND_H__61B64D36_91A4_4E28_9F58_E3BC1A6E9DD5__INCLUDED_)
#define AFX_WOOPRINTFRMWND_H__61B64D36_91A4_4E28_9F58_E3BC1A6E9DD5__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
// WooPrintFrmWnd.h : header file
//
#include "WooPrintView.h"

/////////////////////////////////////////////////////////////////////////////
// CWooPrintFrmWnd frame

class CWooPrintFrmWnd : public CFrameWnd
{
 DECLARE_DYNCREATE(CWooPrintFrmWnd)
protected:

// Attributes
public:
 BOOL m_bDirectPrint;
 CWnd* m_pOldWnd;
 CWooPrintView* m_pView;//用于保存视图类对象
 CWooPrintFrmWnd(); // protected constructor used by dynamic creation
 CWooPrintFrmWnd(BOOL bPrint); // protected constructor used by dynamic creation
// Operations
public:

// Overrides
 // ClassWizard generated virtual function overrides
 //{{AFX_VIRTUAL(CWooPrintFrmWnd)
 protected:
 virtual BOOL PreCreateWindow(CREATESTRUCT& cs);
 //}}AFX_VIRTUAL

// Implementation
protected:
 virtual ~CWooPrintFrmWnd();

 // Generated message map functions
 //{{AFX_MSG(CWooPrintFrmWnd)
 afx_msg int OnCreate(LPCREATESTRUCT lpCreateStruct);
 //}}AFX_MSG
 DECLARE_MESSAGE_MAP()
};

/////////////////////////////////////////////////////////////////////////////

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_WOOPRINTFRMWND_H__61B64D36_91A4_4E28_9F58_E3BC1A6E9DD5__INCLUDED_)

 

#if !defined(AFX_WOOPRINTVIEW_H__7718474D_1BE9_4300_8F69_D0A5B84C1555__INCLUDED_)
#define AFX_WOOPRINTVIEW_H__7718474D_1BE9_4300_8F69_D0A5B84C1555__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
// WooPrintView.h : header file
//

/////////////////////////////////////////////////////////////////////////////
// CWooPrintView view

class CWooPrintView : public CView
{
protected:
 CWooPrintView();           // protected constructor used by dynamic creation
 DECLARE_DYNCREATE(CWooPrintView)

 UINT m_nPageNums;
 UINT m_BindingLineGap;//装订线距离
 UINT m_FootHeight;
 UINT m_HeaderHeight;
 CFont m_FontHeader;
 CFont m_FontFooter;

// Attributes
public:
 void OnFilePrintPreview();
// Operations
public:
 virtual void OnPrepareDC(CDC* pDC, CPrintInfo* pInfo);

 void PrintPageFooter(CDC* pDC,CPrintInfo* pInfo);
 void PrintPageHeader(CDC* pDC,CPrintInfo* pInfo);

// Overrides
 // ClassWizard generated virtual function overrides
 //{{AFX_VIRTUAL(CWooPrintView)
 protected:
 virtual BOOL OnPreparePrinting(CPrintInfo* pInfo);
 virtual void OnDraw(CDC* pDC);      // overridden to draw this view
 virtual void OnPrint(CDC* pDC, CPrintInfo* pInfo);
 //}}AFX_VIRTUAL

// Implementation
protected:
 virtual ~CWooPrintView();
#ifdef _DEBUG
 virtual void AssertValid() const;
 virtual void Dump(CDumpContext& dc) const;
#endif

 // Generated message map functions
 //{{AFX_MSG(CWooPrintView)
 //}}AFX_MSG
 DECLARE_MESSAGE_MAP()
};

/////////////////////////////////////////////////////////////////////////////

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_WOOPRINTVIEW_H__7718474D_1BE9_4300_8F69_D0A5B84C1555__INCLUDED_)

#if !defined(AFX_WOOPREVIEWVIEW_H__7EF15__INCLUDED_)
#define AFX_WOOPREVIEWVIEW_H__7EF15__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
#include "afxpriv.h"

/////////////////////////////////////////////////////////////////////////////
// CWooPreviewView view
class CWooPreviewView : public CPreviewView
{
protected:
 CWooPreviewView();
 DECLARE_DYNCREATE(CWooPreviewView)

public:
 afx_msg void OnPreviewClose();
 afx_msg void OnPreviewPrint();
 // Generated message map functions
protected:
 //{{AFX_MSG(CWooPreviewView)
 //}}AFX_MSG
 DECLARE_MESSAGE_MAP()
};
/////////////////////////////////////////////////////////////////////////////
#endif // !defined(AFX_WOOPREVIEWVIEW_H__7EF15__INCLUDED_)

 

添加实现代码

 

// WooPrintFrmWnd.cpp : implementation file
//

#include "stdafx.h"
#include "WooPrintFrmWnd.h"

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

/////////////////////////////////////////////////////////////////////////////
// CWooPrintFrmWnd

IMPLEMENT_DYNCREATE(CWooPrintFrmWnd, CFrameWnd)

CWooPrintFrmWnd::CWooPrintFrmWnd()
{
}

CWooPrintFrmWnd::CWooPrintFrmWnd(BOOL bPrint)
{
 m_bDirectPrint = bPrint;
 m_pOldWnd = AfxGetApp()->m_pMainWnd;
 if(!Create(NULL, "****程序→打印预览", WS_OVERLAPPEDWINDOW|FWS_ADDTOTITLE,CRect(200,200,600,600)))
  TRACE0("Failed to create view window!/n");
}

CWooPrintFrmWnd::~CWooPrintFrmWnd()
{
 m_pOldWnd->ShowWindow(SW_SHOW);
}

BEGIN_MESSAGE_MAP(CWooPrintFrmWnd, CFrameWnd)
 //{{AFX_MSG_MAP(CWooPrintFrmWnd)
 ON_WM_CREATE()
 //}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CWooPrintFrmWnd message handlers

BOOL CWooPrintFrmWnd::PreCreateWindow(CREATESTRUCT& cs)
{
 cs.style &= (~WS_THICKFRAME);
 cs.style &= (~WS_MAXIMIZEBOX);
 return CFrameWnd::PreCreateWindow(cs);
}

int CWooPrintFrmWnd::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
 if (CFrameWnd::OnCreate(lpCreateStruct) == -1)
  return -1; 
 CCreateContext context;
 context.m_pNewViewClass = RUNTIME_CLASS(CWooPrintView);
 context.m_pCurrentFrame = this;
 context.m_pCurrentDoc = NULL;
 context.m_pLastView = NULL;

 m_pView = STATIC_DOWNCAST(CWooPrintView, CreateView(&context));
 if(m_pView != NULL)
  {
  m_pView->ShowWindow(SW_SHOW);
  SetActiveView(m_pView);
  }
 SetIcon(m_pOldWnd->GetIcon(FALSE),FALSE);
 SetIcon(m_pOldWnd->GetIcon(TRUE),TRUE);
 if (!m_bDirectPrint)//预览
  {
  ShowWindow(SW_MAXIMIZE);
  m_pOldWnd->ShowWindow(SW_HIDE);
  AfxGetApp()->m_pMainWnd=this;
  m_pView->PostMessage(WM_COMMAND, ID_FILE_PRINT_PREVIEW);
  }
 else//直接打印
  {
  ShowWindow(SW_HIDE);
  m_pView->SendMessage(WM_COMMAND, ID_FILE_PRINT);
  }
 return 0;
}

 

// WooPrintView.cpp : implementation file
//

#include "stdafx.h"
#include "WooPrintView.h"
#include "WooPrintFrmWnd.h"
#include "WooPrintDlg.h"

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

BOOL CALLBACK _AfxMyPreviewCloseProc(CFrameWnd* pFrameWnd)//很关键，删除以上打印类资源

{
 ASSERT_VALID(pFrameWnd);
 CWooPreviewView* pView = (CWooPreviewView*) pFrameWnd->GetDlgItem(AFX_IDW_PANE_FIRST);
 ASSERT_KINDOF(CPreviewView, pView);
 pView->OnPreviewClose();
 return FALSE;
};

/////////////////////////////////////////////////////////////////////////////
// CWooPreviewView
IMPLEMENT_DYNCREATE(CWooPreviewView, CPreviewView)
CWooPreviewView::CWooPreviewView()
{
}

BEGIN_MESSAGE_MAP(CWooPreviewView, CPreviewView)
 //{{AFX_MSG_MAP(CWooPreviewView)
 ON_COMMAND(AFX_ID_PREVIEW_CLOSE, OnPreviewClose)
 ON_COMMAND(AFX_ID_PREVIEW_PRINT, OnPreviewPrint)
 //}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CWooPreviewView message handlers
void CWooPreviewView::OnPreviewClose()//关闭预览窗口
{
 CWooPrintFrmWnd* pFrame = (CWooPrintFrmWnd*) ::AfxGetMainWnd();
 AfxGetApp()->m_pMainWnd = pFrame->m_pOldWnd;
 pFrame->DestroyWindow();
}

void CWooPreviewView::OnPreviewPrint()//从预览窗口直接打印
{
 m_pPrintView->SendMessage(WM_COMMAND, ID_FILE_PRINT_DIRECT);//ID_FILE_PRINT_DIRECT
}

/////////////////////////////////////////////////////////////////////////////

/////////////////////////////////////////////////////////////////////////////
// CWooPrintView

IMPLEMENT_DYNCREATE(CWooPrintView, CView)

CWooPrintView::CWooPrintView()
{
 m_BindingLineGap = 100;
 m_HeaderHeight = 120;
 m_FootHeight = 100;
 m_FontHeader.CreateFont(.............);
 m_FontFooter.CreateFont(..............);
}

CWooPrintView::~CWooPrintView()
{
 if (&m_FontHeader)
  m_FontHeader.DeleteObject();
 if (&m_FontFooter)
  m_FontFooter.DeleteObject();
}

BEGIN_MESSAGE_MAP(CWooPrintView, CView)
 ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint)
 ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint)
 ON_COMMAND(ID_FILE_PRINT_PREVIEW, OnFilePrintPreview)
 //{{AFX_MSG_MAP(CWooPrintView)
 //}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CWooPrintView drawing

/////////////////////////////////////////////////////////////////////////////
// CWooPrintView diagnostics

#ifdef _DEBUG
void CWooPrintView::AssertValid() const
{
 CView::AssertValid();
}

void CWooPrintView::Dump(CDumpContext& dc) const
{
 CView::Dump(dc);
}
#endif //_DEBUG

void CWooPrintView::OnDraw(CDC* pDC)
{
}

/////////////////////////////////////////////////////////////////////////////
// CWooPrintView message handlers
BOOL CWooPrintView::OnPreparePrinting(CPrintInfo* pInfo)
{
 int nLines = .......................;//行数
 m_nPageNums = (nLines%20==0? nLines/20 : (1+nLines/20) );//页数,每页约20行
 m_nPageNums = (m_nPageNums==0? 1:m_nPageNums);
 pInfo->SetMinPage(1);
 pInfo->SetMaxPage(m_nPageNums);

 return DoPreparePrinting(pInfo);
}

void CWooPrintView::OnFilePrintPreview( )
{
 CPrintPreviewState* pState = new CPrintPreviewState;
 pState->lpfnCloseProc =_AfxMyPreviewCloseProc;//设置打印预览窗口关闭时的调用函数；
 if(!DoPrintPreview(AFX_IDD_PREVIEW_TOOLBAR, this, RUNTIME_CLASS(CWooPreviewView), pState))
 {
 TRACE0("Error: DoPrintPreview failed./n");
 AfxMessageBox(AFX_IDP_COMMAND_FAILURE);
 delete pState;
 }
}

void CWooPrintView::OnPrepareDC(CDC* pDC, CPrintInfo* pInfo)
{
 CView::OnPrepareDC(pDC, pInfo);

 if (pDC->IsPrinting() && pInfo!=NULL)
  {
  pDC->SetMapMode(MM_LOMETRIC);

  CSize size;
  size.cx = abs(pInfo->m_rectDraw.Width());
  size.cy = abs(pInfo->m_rectDraw.Height());
  pDC->SetWindowExt(size);//设备实际的实际逻辑大小

  //得到实际设备每逻辑英寸的像素数量
  int xLogPixPerInch = pDC->GetDeviceCaps(LOGPIXELSX);
  int yLogPixPerInch = pDC->GetDeviceCaps(LOGPIXELSY);
  //得到设备坐标大小//确定视口大小
  long xExt = (long)size.cx*xLogPixPerInch/254 ;
  long yExt = (long)-size.cy*yLogPixPerInch/254 ;
  pDC->SetViewportExt((int)xExt, (int)yExt);
  }
}

void CWooPrintView::OnPrint(CDC* pDC, CPrintInfo* pInfo)
{
 if (pInfo->m_nCurPage > m_nPageNums)
  return;
 
 PrintPageHeader(pDC, pInfo);
.........................
 for (UINT i=1; i<=m_nPageNums; i++)
 {
 CString str = "..........";
 if (pInfo->m_nCurPage == i)
  pDC->TextOut(............);
 }
.....................................
 PrintPageFooter(pDC, pInfo);
}

void CWooPrintView::PrintPageHeader(CDC* pDC, CPrintInfo* pInfo)
{

}

void CWooPrintView::PrintPageFooter(CDC* pDC,CPrintInfo* pInfo)
{

}

 

 

最后，使用时

void CWooDlg::OnOK() //直接打印
{
 OnSelPrintType();
 CWooPrintFrmWnd* WooPrintFrmWnd = new CWooPrintFrmWnd(1);
}

void CWooDlg::OnPreviewPrint() //预览
{
 OnSelPrintType();
 CWooPrintFrmWnd* WooPrintFrmWnd = new CWooPrintFrmWnd(0);
}