📄 preview.cpp
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// PreView.cpp : implementation file
//
#include "stdafx.h"
#include "PreView.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CPreView dialog
CPreView::CPreView(CWnd* pParent /*=NULL*/)
: CDialog(CPreView::IDD, pParent)
{
m_CurPage = 1;
pDrawInfo = NULL;
//{{AFX_DATA_INIT(CPreView)
//}}AFX_DATA_INIT
}
void CPreView::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CPreView)
//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CPreView, CDialog)
//{{AFX_MSG_MAP(CPreView)
ON_WM_PAINT()
ON_WM_SIZE()
ON_WM_VSCROLL()
ON_WM_HSCROLL()
ON_WM_MOUSEWHEEL()
ON_WM_CTLCOLOR()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CPreView message handlers
BOOL CPreView::OnCommand(WPARAM wParam, LPARAM lParam)
{
int nID = LOWORD(wParam);
switch(nID)
{
case IDOK:
return FALSE;
case IDCANCEL:
return FALSE;
}
return CDialog::OnCommand(wParam, lParam);
}
BOOL CPreView::OnInitDialog()
{
CDialog::OnInitDialog();
ULONG ulScrollLines;
HDC hdc;
hdc = ::GetDC(::GetDesktopWindow());
int xPix = ::GetDeviceCaps(hdc, LOGPIXELSX);
int yPix = ::GetDeviceCaps(hdc, LOGPIXELSY);
::ReleaseDC(::GetDesktopWindow(), hdc);
nW = xPix*B5_W*10/254;
nH = yPix*B5_H*10/254;
xPt = 0; yPt = 0;
SystemParametersInfo(SPI_GETWHEELSCROLLLINES, 0, &ulScrollLines, 0);
if (ulScrollLines)
iDeltaPerLine = WHEEL_DELTA/ulScrollLines ;
else
iDeltaPerLine = 0 ;
iAccumDelta = 0;
cBmp.LoadBitmap(BMP_BACK);
m_brush.CreatePatternBrush(&cBmp);
cPen.CreatePen(PS_SOLID, 2, RGB(0, 0, 0));
si.cbSize = sizeof (si) ;
si.fMask = SIF_RANGE | SIF_PAGE ;
si.nMin = 0 ;
si.nMax = 0;
si.nPage = 0 ;
xPt = 0; yPt =0;
SetScrollInfo(SB_VERT, &si, TRUE) ;
SetScrollInfo(SB_HORZ, &si, TRUE) ;
return TRUE;
}
BOOL CPreView::DestroyWindow()
{
m_brush.DeleteObject();
cBmp.DeleteObject();
cPen.DeleteObject();
return CDialog::DestroyWindow();
}
void CPreView::OnPaint()
{
CPaintDC dc(this);
CClientDC dlgDC(this);
SetWindowOrgEx(dlgDC.m_hDC, xPt, yPt, NULL);
CDC MemDc;
MemDc.CreateCompatibleDC(NULL);
CBitmap cBitmap;
int xP = dlgDC.GetDeviceCaps(LOGPIXELSX);
int yP = dlgDC.GetDeviceCaps(LOGPIXELSY);
DOUBLE xPix = (DOUBLE)xP*10/254; //每 mm 宽度的像素
DOUBLE yPix = (DOUBLE)yP*10/254; //每 mm 高度的像素
cBitmap.CreateCompatibleBitmap(&dlgDC, B5_W*xPix, B5_H*yPix);
MemDc.SelectObject(&cBitmap);
if(pDrawInfo!= NULL)
{
PrnInfo.IsPrint = FALSE;
PrnInfo.nCurPage = m_CurPage;
pDrawInfo(MemDc, PrnInfo);
}
dlgDC.BitBlt(xP/2, yP/2, B5_W*xPix+xP/2, B5_H*yPix+yP/2, &MemDc, 0, 0, SRCCOPY);
MemDc.DeleteDC();
cBitmap.DeleteObject();
}
void CPreView::OnSize(UINT nType, int cx, int cy)
{
CDialog::OnSize(nType, cx, cy);
GetClientRect(&WndRect);
SetScrollbar(cx, cy);
InvalidateRect(NULL);
UpdateWindow();
}
void CPreView::SetScrollbar(int cx, int cy)
{
HDC hdc;
hdc = ::GetDC(::GetDesktopWindow());
int xPix = ::GetDeviceCaps(hdc, LOGPIXELSX);
int yPix = ::GetDeviceCaps(hdc, LOGPIXELSY);
::ReleaseDC(::GetDesktopWindow(), hdc);
xPt = 0;
//设定滚动条垂直滚动范围及页面大小
si.cbSize = sizeof (si) ;
si.fMask = SIF_RANGE | SIF_PAGE ;
si.nMin = 0;
si.nMax = nH+yPix; //内容的高度
si.nPage = WndRect.Height(); //页面的高度
SetScrollInfo(SB_VERT, &si, TRUE);
si.fMask = SIF_POS;
si.nPos = 0;
SetScrollInfo(SB_VERT, &si, TRUE);
//设定滚动条水平滚动范围及页面大小
si.cbSize = sizeof (si);
si.fMask = SIF_RANGE | SIF_PAGE;
si.nMin = 0;
si.nMax = nW+xPix; //内容的宽度
si.nPage = WndRect.Width(); //页面的宽度
SetScrollInfo(SB_HORZ, &si, TRUE);
si.fMask = SIF_POS;
si.nPos = 0;
SetScrollInfo(SB_HORZ, &si, TRUE);
xPt = yPt = 0;
}
void CPreView::OnVScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)
{
si.cbSize = sizeof (si) ;
si.fMask = SIF_ALL ;
GetScrollInfo(SB_VERT, &si);
int iVertPos = si.nPos ;
switch(nSBCode)
{
case SB_TOP:
si.nPos = si.nMin; break;
case SB_BOTTOM:
si.nPos = si.nMax; break;
case SB_LINEUP:
si.nPos -= 15; break;
case SB_LINEDOWN:
si.nPos += 15; break;
case SB_PAGEUP:
si.nPos -= si.nPage; break;
case SB_PAGEDOWN:
si.nPos += si.nPage; break;
case SB_THUMBTRACK:
si.nPos = si.nTrackPos; break;
}
si.fMask = SIF_POS ;
SetScrollInfo(SB_VERT, &si, TRUE) ;
GetScrollInfo(SB_VERT, &si) ;
if(si.nPos != iVertPos)
{
yPt += si.nPos - iVertPos;
ScrollWindow(0, iVertPos - si.nPos, NULL, NULL);
UpdateWindow();
::UpdateWindow(GetParent()->m_hWnd);
}
CDialog::OnVScroll(nSBCode, nPos, pScrollBar);
}
void CPreView::OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)
{
si.cbSize = sizeof(si);
si.fMask = SIF_ALL;
GetScrollInfo(SB_HORZ, &si) ;
int iHorzPos = si.nPos ;
switch(nSBCode)
{
case SB_LINELEFT:
si.nPos -= 15; break;
case SB_LINERIGHT:
si.nPos += 15; break;
case SB_PAGELEFT:
si.nPos -= si.nPage; break;
case SB_PAGERIGHT:
si.nPos += si.nPage; break;
case SB_THUMBTRACK:
si.nPos = si.nTrackPos; break;
}
si.fMask = SIF_POS ;
SetScrollInfo(SB_HORZ, &si, TRUE);
GetScrollInfo(SB_HORZ, &si);
if (si.nPos != iHorzPos)
{
xPt += si.nPos - iHorzPos;
ScrollWindow(iHorzPos - si.nPos, 0, NULL, NULL);
UpdateWindow();
}
CDialog::OnHScroll(nSBCode, nPos, pScrollBar);
}
BOOL CPreView::OnMouseWheel(UINT nFlags, short zDelta, CPoint pt)
{
if(iDeltaPerLine != 0)
{
iAccumDelta += zDelta;
while(iAccumDelta >= iDeltaPerLine)
{
SendMessage(WM_VSCROLL, SB_LINEUP, 0);
iAccumDelta -= iDeltaPerLine ;
}
while(iAccumDelta <= -iDeltaPerLine)
{
SendMessage(WM_VSCROLL, SB_LINEDOWN, 0) ;
iAccumDelta += iDeltaPerLine;
}
}
return CDialog::OnMouseWheel(nFlags, zDelta, pt);
}
HBRUSH CPreView::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
{
HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);
if (nCtlColor == CTLCOLOR_DLG)
return (HBRUSH)m_brush.GetSafeHandle();
return hbr;
}
void CPreView::SetCallBackFun(PRINTPREVIEW pFun, PRNINFO sPrnInfo)
{
memcpy(&PrnInfo, &sPrnInfo, sizeof(PRNINFO));
pDrawInfo = pFun;
m_CountPage = PrnInfo.nCountPage; //共多少页
m_CurPage = PrnInfo.nCurPage; //当前页
}
LPTSTR CPreView::GetRegistryString(HKEY hKeyClass, LPTSTR lpszSubKey, LPTSTR lpszValueName)
{
// Local variables
HKEY hKey; // Registry key
LPTSTR lpszKeyValue; // Buffer for key name
DWORD dwKeySize; // Size of key value
DWORD dwKeyDataType; // Type of data stored in key
LONG lRC; // Return code
// Initialize variables
dwKeyDataType = 0;
dwKeySize = 0;
hKey = NULL;
lRC = RegOpenKey(hKeyClass, lpszSubKey, &hKey);
if (lRC != ERROR_SUCCESS)
{
return(NULL);
}
// Got key, get value. First, get the size of the key.
lRC = RegQueryValueEx(hKey, lpszValueName, NULL, NULL, NULL, &dwKeySize);
if (lRC != ERROR_SUCCESS)
{
return(NULL);
}
if (dwKeySize <= 1) // Registry will return "" if no printers installed
{
return(NULL);
}
lpszKeyValue = (LPTSTR)GlobalAlloc(GPTR, (++dwKeySize));
if (lpszKeyValue == NULL)
{
return(NULL);
}
lRC = RegQueryValueEx(hKey, lpszValueName, NULL, &dwKeyDataType, (LPBYTE)lpszKeyValue, &dwKeySize);
return(lpszKeyValue);
} // End of function GetRegistryString
LPTSTR CPreView::CopyString(LPTSTR lpszSrc)
{
// Local variables
LPTSTR lpszDest;
int iStrLen;
// Initialize variables
lpszDest = NULL;
if (lpszSrc == NULL)
{
DebugMsg(__TEXT("ICMVIEW.C : CopyString : lpszSrc == NULL\r\n"));
return(NULL);
}
iStrLen = ((int)(lstrlen(lpszSrc) +1) * sizeof(TCHAR));
lpszDest = (LPTSTR)GlobalAlloc(GPTR, iStrLen);
_tcscpy(lpszDest, lpszSrc);
return(lpszDest);
} // End of function CopyString
PDEVMODE CPreView::GetDefaultPrinterDevMode(LPTSTR lpszPrinterName)
{
LONG lDevModeSize;
HANDLE hDevMode;
PDEVMODE pDevMode = NULL;
lDevModeSize = DocumentProperties(NULL, NULL, lpszPrinterName, NULL, NULL, 0);
if (lDevModeSize > 0)
{
hDevMode = GlobalAlloc(GHND, lDevModeSize);
pDevMode = (PDEVMODE) GlobalLock(hDevMode);
DocumentProperties(NULL, NULL, lpszPrinterName, pDevMode, NULL, DM_OUT_BUFFER);
}
else
{
DebugMsg(__TEXT("GetDefaultPrinterDevMode: Could not obtain printer's devmode.\r\n"));
}
return pDevMode;
}
void CPreView::DebugMsg (LPTSTR lpszMessage,...)
{
#ifdef _DEBUG
va_list VAList;
TCHAR szMsgBuf[256];
// Pass the variable parameters to wvsprintf to be formated.
va_start(VAList, lpszMessage);
wvsprintf(szMsgBuf, lpszMessage, VAList);
va_end(VAList);
ASSERT(lstrlen((LPTSTR)szMsgBuf) < MAX_DEBUG_STRING);
OutputDebugString(szMsgBuf);
#endif
lpszMessage = lpszMessage; // Eliminates 'unused formal parameter' warning
}
void DebugMsgA (LPSTR lpszMessage,...)
{
#ifdef _DEBUG
va_list VAList;
char szMsgBuf[256];
// Pass the variable parameters to wvsprintf to be formated.
va_start(VAList, lpszMessage);
wvsprintfA(szMsgBuf, lpszMessage, VAList);
va_end(VAList);
ASSERT(strlen((LPSTR)szMsgBuf) < MAX_DEBUG_STRING);
OutputDebugStringA(szMsgBuf);
#endif
lpszMessage = lpszMessage; // Eliminates 'unused formal parameter' warning
}
HDC CPreView::GetPrinterDC(LPTSTR lpszFriendlyName, PDEVMODE pDevMode)
{
HDC hDC;
BOOL bFreeDevMode = FALSE;
// Initialize variables
hDC = NULL;
if (lpszFriendlyName != NULL)
{
// Make sure that we have a devmode.
if (NULL == pDevMode)
{
pDevMode = GetDefaultPrinterDevMode(lpszFriendlyName);
bFreeDevMode = TRUE;
}
// Now get a DC for the printer
hDC = CreateDC(NULL, lpszFriendlyName, NULL, pDevMode);
// Free devmode if created in routine.
if (bFreeDevMode)
{
GlobalFree((HANDLE)pDevMode);
}
}
else
{
DebugMsg(__TEXT("GetPrinterDC: lpszFriendlyName == NULL"));
}
return hDC;
} // End of function GetPrinterDC
HDC CPreView::GetDefaultPrinterDC()
{
HDC hDC;
LPTSTR lpszPrinterName;
// Initialize variables
hDC = NULL;
lpszPrinterName = GetDefaultPrinterName();
if (lpszPrinterName != NULL)
{
hDC = GetPrinterDC(lpszPrinterName, NULL);
GlobalFree(lpszPrinterName);
}
else
{
DebugMsg(__TEXT("GetDefaultPrinterDC: Could not obtain default printer name.\r\n"));
}
return hDC;
} // End of function GetDefaultPrinterDC
LPTSTR CPreView::GetDefaultPrinterName(void)
{
// Local variables
LPTSTR lpszDefaultPrinter = NULL;
if(IS_WIN95)
{
lpszDefaultPrinter = GetRegistryString(HKEY_CURRENT_CONFIG,
__TEXT("SYSTEM\\CurrentControlSet\\Control\\Print\\Printers"),
__TEXT("Default"));
}
else if (IS_NT)
{
TCHAR szTemp[MAX_PATH];
LPTSTR lpszTemp;
// Get Default printer name.
GetProfileString(__TEXT("windows"), __TEXT("device"), __TEXT(""),
szTemp, sizeof(szTemp));
if (lstrlen(szTemp) == 0)
{
// INVARIANT: no default printer.
return(NULL);
}
// Terminate at first comma, just want printer name.
lpszTemp = _tcschr(szTemp, ',');
if (lpszTemp != NULL)
{
*lpszTemp = '\x0';
}
lpszDefaultPrinter = CopyString((LPTSTR)szTemp);
}
return(lpszDefaultPrinter);
} // End of function GetDefaultPrinterName
void CPreView::PrintDoc()
{
if(MessageBox("决定打印当前报表吗?", "打印提示", MB_ICONQUESTION | MB_YESNO | MB_DEFBUTTON2) !=IDYES)
return;
HDC hdcPrint = GetDefaultPrinterDC();
if(hdcPrint == NULL)
{
MessageBox("打印机初始化失败!", "错误", MB_ICONSTOP);
return;
}
CDC MemDc;
MemDc.Attach(hdcPrint);
if(pDrawInfo!= NULL)
{
PrnInfo.IsPrint = TRUE;
PrnInfo.nCurPage = m_CurPage;
PrnInfo.nMaxLine = m_CountPage;
pDrawInfo(MemDc, PrnInfo);
}
MemDc.DeleteDC();
// PRINTDLG pd; //该结构包含打印对话框中的所有信息
// LPDEVMODE lpDevMode;
// if(AfxGetApp()->GetPrinterDeviceDefaults(&pd)) //获得默认的打印机的信息
// {
// lpDevMode=(LPDEVMODE)GlobalLock(pd.hDevMode);
// if(lpDevMode)
// {
// lpDevMode->dmPaperSize=DMPAPER_A4; //将打印纸设置为A4
// lpDevMode->dmOrientation=DMORIENT_LANDSCAPE; //将打印机设置为横向打印。
// lpDevMode->dmPrintQuality=600 //打印分辨率为600dpi
// }
// GlobalUnlock(pd.hDevMode);
// }
}
void CPreView::SetCurrentPage(int nCountPage, int nCurPage)
{
m_CountPage = nCountPage; //共多少页
m_CurPage = nCurPage; //当前页
}
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