appprnt.cpp

vc6.0完整版

// This is a part of the Microsoft Foundation Classes C++ library.
// Copyright (C) 1992-1998 Microsoft Corporation
// All rights reserved.
//
// This source code is only intended as a supplement to the
// Microsoft Foundation Classes Reference and related
// electronic documentation provided with the library.
// See these sources for detailed information regarding the
// Microsoft Foundation Classes product.

#include "stdafx.h"
#include <cderr.h>      // Commdlg Error definitions
#include <winspool.h>

#ifdef AFX_PRINT_SEG
#pragma code_seg(AFX_PRINT_SEG)
#endif

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

/////////////////////////////////////////////////////////////////////////////
// WinApp support for printing

BOOL CWinApp::GetPrinterDeviceDefaults(PRINTDLG* pPrintDlg)
{
	UpdatePrinterSelection(m_hDevNames == NULL); //force default if no current
	if (m_hDevNames == NULL)
		return FALSE;               // no printer defaults

	pPrintDlg->hDevNames = m_hDevNames;
	pPrintDlg->hDevMode = m_hDevMode;

	::GlobalUnlock(m_hDevNames);
	::GlobalUnlock(m_hDevMode);
	return TRUE;
}

void CWinApp::UpdatePrinterSelection(BOOL bForceDefaults)
{
	if (!bForceDefaults && m_hDevNames != NULL)
	{
		LPDEVNAMES lpDevNames = (LPDEVNAMES)::GlobalLock(m_hDevNames);
		ASSERT(lpDevNames != NULL);
		if (lpDevNames->wDefault & DN_DEFAULTPRN)
		{
			CPrintDialog pd(TRUE);
			pd.GetDefaults();

			if (pd.m_pd.hDevNames == NULL)
			{
				// Printer was default, but now there are no printers at all!
				if (m_hDevMode != NULL)
					AfxGlobalFree(m_hDevMode);
				AfxGlobalFree(m_hDevNames);
				m_hDevMode = NULL;
				m_hDevNames = NULL;
			}
			else if (
				lstrcmp((LPCTSTR)lpDevNames + lpDevNames->wDriverOffset,
					pd.GetDriverName()) != 0 ||
				lstrcmp((LPCTSTR)lpDevNames + lpDevNames->wDeviceOffset,
					pd.GetDeviceName()) != 0 ||
				lstrcmp((LPCTSTR)lpDevNames + lpDevNames->wOutputOffset,
					pd.GetPortName()) != 0)
			{
				// Printer was default, and default has changed...assume default
				if (m_hDevMode != NULL)
					AfxGlobalFree(m_hDevMode);
				AfxGlobalFree(m_hDevNames);
				m_hDevMode = pd.m_pd.hDevMode;
				m_hDevNames = pd.m_pd.hDevNames;
			}
			else
			{
				// Printer was default, and still is...keep the same
				if (pd.m_pd.hDevMode != NULL)
					AfxGlobalFree(pd.m_pd.hDevMode);
				if (pd.m_pd.hDevNames != NULL)
					AfxGlobalFree(pd.m_pd.hDevNames);
			}
		}
	}
	else
	{
		// First time or Forced -- Get defaults
		CPrintDialog pd(TRUE);
		pd.GetDefaults();

		if (m_hDevMode != NULL)
			AfxGlobalFree(m_hDevMode);
		if (m_hDevNames != NULL)
			AfxGlobalFree(m_hDevNames);

		m_hDevMode = pd.m_pd.hDevMode;
		m_hDevNames = pd.m_pd.hDevNames;
	}
}

int CWinApp::DoPrintDialog(CPrintDialog* pPD)
{
	UpdatePrinterSelection(FALSE);

	pPD->m_pd.hDevMode = m_hDevMode;
	pPD->m_pd.hDevNames = m_hDevNames;
	int nResponse = pPD->DoModal();

	// if OK or Cancel is selected we need to update cached devMode/Names
	while (nResponse != IDOK && nResponse != IDCANCEL)
	{
		switch (::CommDlgExtendedError())
		{
		// CommDlg cannot give these errors after NULLing these handles
		case PDERR_PRINTERNOTFOUND:
		case PDERR_DNDMMISMATCH:
		case PDERR_DEFAULTDIFFERENT:
			if (pPD->m_pd.hDevNames != NULL)
			{
				ASSERT(m_hDevNames == pPD->m_pd.hDevNames);
				AfxGlobalFree(pPD->m_pd.hDevNames);
				pPD->m_pd.hDevNames = NULL;
				m_hDevNames = NULL;
			}

			if (pPD->m_pd.hDevMode)
			{
				ASSERT(m_hDevMode == pPD->m_pd.hDevMode);
				AfxGlobalFree(pPD->m_pd.hDevMode);
				pPD->m_pd.hDevMode = NULL;
				m_hDevMode = NULL;
			}
			break;

		default:
			return nResponse;       // do not update cached devMode/Names
		}

		nResponse = pPD->DoModal();
	}

	// refresh current CWinApp cache of printer device information
	m_hDevMode = pPD->m_pd.hDevMode;
	m_hDevNames = pPD->m_pd.hDevNames;

	return nResponse;
}

void CWinApp::OnFilePrintSetup()
{
	CPrintDialog pd(TRUE);
	DoPrintDialog(&pd);
}

void CWinApp::SelectPrinter(HANDLE hDevNames, HANDLE hDevMode, BOOL bFreeOld)
{
	if (m_hDevNames != hDevNames)
	{
		if (m_hDevNames != NULL && bFreeOld)
			AfxGlobalFree(m_hDevNames);
		m_hDevNames = hDevNames;
	}
	if (m_hDevMode != hDevMode)
	{
		if (m_hDevMode != NULL && bFreeOld)
			AfxGlobalFree(m_hDevMode);
		m_hDevMode = hDevMode;
	}
}

BOOL CWinApp::CreatePrinterDC(CDC& dc)
{
	HDC hDC = AfxCreateDC(m_hDevNames, m_hDevMode);
	if (hDC != NULL)
	{
		dc.DeleteDC();
		VERIFY(dc.Attach(hDC));
		return TRUE;
	}
	return FALSE;
}

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