myprint.cpp

超市管理系统超市管理系统超市管理系统超市管理系统超市管理系统超市管理系统

#include "StdAfx.h"
#include "MyPrint.h" 
//构造函数
CMyPrint::CMyPrint ()
{
	m_CDC=new CDC();
	strDocName="打印";
	blnVal=FALSE;
	m_rcPrintMargin.left=25;
	m_rcPrintMargin.right=25;
	m_rcPrintMargin.top=40;
	m_rcPrintMargin.bottom=30;
	nXPixelsOfInch=300;
	nYPixelsOfInch=300;
	rcContent.left=m_rcPrintMargin.left;
	rcContent.top=m_rcPrintMargin.top;
	rcContent.right=600;
	rcContent.bottom=800;
}
//析构函数
CMyPrint::~CMyPrint()
{
	if (m_hDevNames != NULL)
        GlobalFree(m_hDevNames);
	if (m_hDevMode != NULL)
        GlobalFree(m_hDevMode);
	if(m_CDC->m_hDC!=NULL)
	{
		m_CDC->ReleaseOutputDC();
		m_CDC->~CDC();
	}		
}
//释放内存
void CMyPrint::FreeAllMemory()
{
	if (m_hDevNames != NULL)
        GlobalFree(m_hDevNames);
	if (m_hDevMode != NULL)
        GlobalFree(m_hDevMode);
	if(m_CDC->m_hDC!=NULL)
	{
		m_CDC->ReleaseOutputDC();
	}
}
//返回CDC指针
CDC* CMyPrint::GetMyCdc()
{
	//	打印设置
	GetPrinterDeviceDefaults();
	//	设置默认打印方向为横向
	SetPrintOrientation(blnVal);
	PRINTDLG	pd;
	memset(&pd, 0, sizeof(PRINTDLG));
	pd.lStructSize = sizeof(PRINTDLG);
	pd.Flags = PD_RETURNDC | PD_NOSELECTION;
	pd.hDC = NULL;
	pd.hwndOwner = NULL;
	pd.hInstance = NULL;
	pd.nMaxPage = 1;
	pd.nMinPage = 1;
	pd.nFromPage = 1;
	pd.nToPage = 1;
	pd.nCopies = 1;
	pd.hDevMode = NULL;
	pd.hDevNames = NULL;
	pd.hDevMode = m_hDevMode;
	//显示打印对话框，由用户来设定纸张大小等。
	if (!PrintDlg(&pd))
		return FALSE;
	ASSERT(pd.hDC != NULL);
	int nHorRes = GetDeviceCaps(pd.hDC, HORZRES); 
	int nVerRes = GetDeviceCaps(pd.hDC, VERTRES);
	nXPixelsOfInch = GetDeviceCaps(pd.hDC, LOGPIXELSX);
	nYPixelsOfInch = GetDeviceCaps(pd.hDC, LOGPIXELSY);
	//	计算页面可写面积
	rcContent.left=m_rcPrintMargin.left;
	rcContent.top=m_rcPrintMargin.top;
	rcContent.right=(long)(nHorRes*GetPrintProportionX()-m_rcPrintMargin.right);
	rcContent.bottom=(long)(nVerRes*GetPrintProportionY()-m_rcPrintMargin.bottom);
	//	开始打印
	DOCINFO di;
	di.cbSize = sizeof(DOCINFO);
	di.lpszDocName =strDocName; 
	di.lpszOutput = (LPTSTR) NULL; 
	di.lpszDatatype = (LPTSTR) NULL; 
	di.fwType = 0; 
	StartDoc(pd.hDC, &di);
	if(m_CDC->m_hDC!=NULL)
	{
		m_CDC->ReleaseOutputDC();
	}
	m_CDC->m_hDC=pd.hDC;
	return m_CDC;
}
//人为的获得打印机的驱动
CDC* CMyPrint::GetManCdc(CString strDriver,CString strDevice, CString strOutput, CONST DEVMODE* lpInitData)
{
	if(m_CDC->m_hDC!=NULL)
	{
		m_CDC->ReleaseOutputDC();
	}
	m_CDC->m_hDC=CreateDC((LPCSTR)strDriver,(LPCSTR)strDevice,(LPCSTR)strOutput,lpInitData);
	DOCINFO df={sizeof(DOCINFO),"打印",NULL};
	int nHorRes = GetDeviceCaps(m_CDC->m_hDC, HORZRES); 
	int nVerRes = GetDeviceCaps(m_CDC->m_hDC, VERTRES);
	nXPixelsOfInch = GetDeviceCaps(m_CDC->m_hDC, LOGPIXELSX);
	nYPixelsOfInch = GetDeviceCaps(m_CDC->m_hDC, LOGPIXELSY);
	//	计算页面可写面积
	rcContent.left=m_rcPrintMargin.left;
	rcContent.top=m_rcPrintMargin.top;
	rcContent.right=(long)(nHorRes*GetPrintProportionX()-m_rcPrintMargin.right);
	rcContent.bottom=(long)(nVerRes*GetPrintProportionY()-m_rcPrintMargin.bottom);
	m_CDC->StartDoc(&df);
	return m_CDC;
}
//得到系统的打印设备属性
BOOL CMyPrint::GetPrinterDeviceDefaults(void)
{
	PRINTDLG printDlg;
	if(AfxGetApp()->GetPrinterDeviceDefaults(&printDlg))
	{
		LPDEVNAMES pDevNames =
			(LPDEVNAMES)::GlobalLock(printDlg.hDevNames);
		LPDEVMODE  pDevMode  = (LPDEVMODE)::GlobalLock(printDlg.hDevMode);		
		if (m_hDevNames != NULL)
			::GlobalFree(m_hDevNames);
		if (m_hDevMode != NULL)
			::GlobalFree(m_hDevMode);		
		m_hDevNames = ::GlobalAlloc(GPTR,
			::GlobalSize(printDlg.hDevNames));
		m_hDevMode = ::GlobalAlloc(GPTR, ::GlobalSize(printDlg.hDevMode));		
		LPDEVNAMES pNewDevNames = (LPDEVNAMES)::GlobalLock(m_hDevNames);
		LPDEVMODE  pNewDevMode  = (LPDEVMODE)::GlobalLock(m_hDevMode);		
		memcpy(pNewDevNames, pDevNames,
			(size_t)::GlobalSize(printDlg.hDevNames));
		memcpy(pNewDevMode, pDevMode,
			(size_t)::GlobalSize(printDlg.hDevMode));		
		::GlobalUnlock(printDlg.hDevNames);
		::GlobalUnlock(printDlg.hDevMode);		
		::GlobalUnlock(m_hDevNames);
		::GlobalUnlock(m_hDevMode);
		return TRUE;
	}
	else
	{
		return FALSE;
    }
}
//	设置打印方向
//	TRUE:横向
//	FALSE:纵向
BOOL CMyPrint::SetPrintOrientation(BOOL bVal)
{
	if (m_hDevMode == NULL)
		return FALSE;
	LPDEVMODE  pNewDevMode  = (LPDEVMODE)::GlobalLock(m_hDevMode);
	if (bVal)
		pNewDevMode->dmOrientation = DMORIENT_LANDSCAPE;	//	横向
	else
		pNewDevMode->dmOrientation = DMORIENT_PORTRAIT;		//	纵向
	::GlobalUnlock(m_hDevMode);
	return TRUE;
}
//开始打印
void CMyPrint::DoPrint()
{
	m_CDC->EndDoc();
	m_CDC->DeleteDC();
}
//得到像素向英寸转换的比例
//像素:英寸=?:1
double CMyPrint::GetPrintProportionX()
{
	double pProportion;
	//分辨率 每英寸的象素点 1250
	pProportion=nXPixelsOfInch/1250.0;
	return pProportion;
}
//由像素转换成所需的英寸
int CMyPrint::IntToRealIntX(int i)
{
	int iTemp;
	iTemp=int(i*1.0/GetPrintProportionX());
	return iTemp;
}
double CMyPrint::GetPrintProportionY()
{
	double pProportion;
	//分辨率 每英寸的象素点 1250
	pProportion=nYPixelsOfInch/1250.0;
	return pProportion;
}
//由像素转换成所需的英寸
int CMyPrint::IntToRealIntY(int i)
{
	int iTemp;
	iTemp=int(i*1.0/GetPrintProportionY());
	return iTemp;
}