POLYLINE.CPP
/*
* POLYLINE.CPP
* Cosmo Chapter 1
*
* Implementation of the CPolyline class.
*
* Copyright (c)1993-1995 Microsoft Corporation, All Rights Reserved
*
* Kraig Brockschmidt, Microsoft
* Internet : kraigb@microsoft.com
* Compuserve: >INTERNET:kraigb@microsoft.com
*/
#include "cosmo.h"
/*
* CPolyline:CPolyline
* CPolyline::~CPolyline
*
* Constructor Parameters:
* hInst HINSTANCE of the application we're in.
*/
CPolyline::CPolyline(HINSTANCE hInst)
: CWindow(hInst)
{
m_pAdv=NULL;
m_hWnd=NULL;
return;
}
CPolyline::~CPolyline(void)
{
return;
}
/*
* CPolyline::Init
*
* Purpose:
* Instantiates a polyline window within a given parent. The
* parent may be a main application window, could be an MDI child
* window. We really do not care.
*
* Parameters:
* hWndParent HWND of the parent of this window
* pRect LPRECT that this window should occupy
* dwStyle DWORD containing the window's style flags
* uID UINT ID to associate with this window
* pAdv PCPolylineAdviseSink of the sink wanting our
* notifications.
*
* Return Value:
* BOOL TRUE if the function succeeded, FALSE otherwise.
*/
BOOL CPolyline::Init(HWND hWndParent, LPRECT pRect, DWORD dwStyle
, UINT uID, PCPolylineAdviseSink pAdv)
{
m_hWnd=CreateWindowEx(WS_EX_NOPARENTNOTIFY, SZCLASSPOLYLINE
, SZCLASSPOLYLINE, dwStyle, pRect->left, pRect->top
, pRect->right-pRect->left, pRect->bottom-pRect->top
, hWndParent, (HMENU)uID, m_hInst, this);
if (NULL!=m_hWnd)
m_pAdv=pAdv;
return (NULL!=m_hWnd);
}
/*
* CPolyline::New
*
* Purpose:
* Cleans out and reinitializes the data to defaults.
*
* Parameters:
* None
*
* Return Value:
* None
*/
void CPolyline::New(void)
{
UINT i;
RECT rc;
m_pl.wVerMaj=VERSIONMAJOR;
m_pl.wVerMin=VERSIONMINOR;
//Our rectangle is the size of our window's client area.
GetClientRect(m_hWnd, &rc);
RECTTORECTS(rc, m_pl.rc);
//Clean out the POLYLINE structure and repaint the window.
for (i=0; i< CPOLYLINEPOINTS; i++)
{
m_pl.rgpt[i].x=0;
m_pl.rgpt[i].y=0;
}
m_pl.cPoints =0;
m_pl.rgbBackground=GetSysColor(COLOR_WINDOW);
m_pl.rgbLine =GetSysColor(COLOR_WINDOWTEXT);
m_pl.iLineStyle =PS_SOLID;
InvalidateRect(m_hWnd, NULL, TRUE);
UpdateWindow(m_hWnd);
//Inform the advise sink of this data change.
if (NULL!=m_pAdv)
m_pAdv->OnDataChange();
return;
}
/*
* CPolyline::Undo
*
* Purpose:
* Reverses previous actions in a Polyline.
*
* Parameters:
* None
*
* Return Value:
* BOOL TRUE if we can Undo more, FALSE otherwise.
*/
BOOL CPolyline::Undo(void)
{
//Decrement the number of active points and repaint.
if (m_pl.cPoints > 0)
{
m_pl.cPoints--;
InvalidateRect(m_hWnd, NULL, TRUE);
UpdateWindow(m_hWnd);
}
if (NULL!=m_pAdv)
m_pAdv->OnPointChange();
//Return if we can undo any more.
return (0!=m_pl.cPoints);
}
/*
* CPolyline::ReadFromFile
*
* Purpose:
* Loads our data (any known version) from a file handle returning
* the version number of the data or an error value.
*
* Parameters:
* pszFile LPTSTR of the file to open.
*
* Return Value:
* LONG Version number or negative POLYLINE_E_* value.
*/
LONG CPolyline::ReadFromFile(LPTSTR pszFile)
{
OFSTRUCT of;
HFILE hFile;
POLYLINEDATA pl;
UINT cb=(UINT)-1;
UINT cbExpect=0;
if (NULL==pszFile)
return POLYLINE_E_READFAILURE;
//OpenFileW is a member of CPolyline.
hFile=OpenFileW(pszFile, &of, OF_READ);
if (HFILE_ERROR==hFile)
return POLYLINE_E_READFAILURE;
//Read version numbers and seek back to file beginning.
cb=_lread(hFile, &pl, 2*sizeof(WORD));
_llseek(hFile, 0L, 0);
if (2*sizeof(WORD)!=cb)
{
_lclose(hFile);
return POLYLINE_E_READFAILURE;
}
/*
* For version 2.0, read the entire file. For version 1.0 read
* the file up to CBPOLYLINEDATAVER10. For anything else, give
* an error.
*/
switch (pl.wVerMaj)
{
case VERSIONMAJOR: //2.x
switch (pl.wVerMin)
{
case VERSIONMINOR: //2.0
cbExpect=CBPOLYLINEDATA;
break;
default:
break;
}
break;
case 1: //1.x
switch (pl.wVerMin)
{
case 0: //1.0
cbExpect=CBPOLYLINEDATA10;
break;
default:
break;
}
break;
default:
break;
}
if (0==cbExpect)
{
_lclose(hFile);
return POLYLINE_E_UNSUPPORTEDVERSION;
}
cb=_lread(hFile, &pl, cbExpect);
_lclose(hFile);
if (cbExpect!=cb)
return POLYLINE_E_READFAILURE;
/*
* If we loaded successfully, make the data current. By using
* DataSet we centralize our version upgrading. We size the
* polyline window to the data AND notify the document so it
* sizes to the polyline.
*/
DataSet(&pl, TRUE, TRUE);
//Return what version we just loaded.
return MAKELONG(pl.wVerMin, pl.wVerMaj);
}
/*
* CPolyline::WriteToFile
*
* Purpose:
* Ignorantly writes our current data into an opened file in a
* particular version.
*
* Parameters:
* pszFile LPTSTR filename in which to store the data.
* lVer LONG providing version number Major (HI)
* and Minor (Low)
*
* Return Value:
* LONG A POLYLINE_E_* value.
*/
LONG CPolyline::WriteToFile(LPTSTR pszFile, LONG lVer)
{
OFSTRUCT of;
HFILE hFile;
UINT cb;
UINT cbExpect=0;
WORD wVerMaj=HIWORD(lVer);
WORD wVerMin=LOWORD(lVer);
POLYLINEDATA pl;
if (NULL==pszFile)
return POLYLINE_E_READFAILURE;
//Get a copy of our data in the version we're going to save.
DataGet(&pl, lVer);
switch (wVerMaj)
{
case VERSIONMAJOR: //2.x
switch (wVerMin)
{
case VERSIONMINOR: //2.0
cbExpect=CBPOLYLINEDATA;
break;
default:
break;
}
break;
case 1: //1.x
switch (wVerMin)
{
case 0: //1.0
cbExpect=CBPOLYLINEDATA10;
break;
default:
break;
}
break;
default:
break;
}
if (0==cbExpect)
return POLYLINE_E_UNSUPPORTEDVERSION;
hFile=OpenFileW(pszFile, &of, OF_CREATE | OF_WRITE);
if (HFILE_ERROR==hFile)
return DOCERR_COULDNOTOPEN;
cb=_lwrite(hFile, (LPCSTR)&pl, cbExpect);
_lclose(hFile);
return (cbExpect==cb) ? POLYLINE_E_NONE
: POLYLINE_E_WRITEFAILURE;
}
/*
* CPolyline::OpenFileW (Private)
*
* Purpose:
* Under Win32, OpenFile does not take Unicode strings. This
* function converts a Unicode string into an ANSI string and
* calls OpenFile. This just maps to OpenFile without Unicode.
*
* Parameters, Return Value:
* Same as OpenFile.
*/
HFILE CPolyline::OpenFileW(LPTSTR pszFile, LPOFSTRUCT pof
, UINT uFlags)
{
#ifdef UNICODE
CHAR szTemp[CCHPATHMAX];
UNICODETOANSI(pszFile, szTemp, CCHPATHMAX);
return OpenFile(szTemp, pof, uFlags);
#else
return OpenFile(pszFile, pof, uFlags);
#endif
}
/*
* CPolyline::DataSet
*
* Purpose:
* Sets the current data in this Polyline to a given structure.
*
* Parameters:
* ppl PPOLYLINEDATA to initialize to.
* fSizeToData BOOL indicating if we're to size to the data or
* scale it.
* fNotify BOOL indicating if we're to send an advise on
* this change.
*
* Return Value:
* LONG A POLYLINE_E_* value.
*/
LONG CPolyline::DataSet(PPOLYLINEDATA ppl, BOOL fSizeToData
, BOOL fNotify)
{
RECTS rcs;
RECT rc;
UINT i;
/*
* Copy the structure in ppl and repaint to reflect the new
* point set. Note that unlike the RectSet message, we do no
* scaling, assuming that the rect in the structure is
* appropriate for the data.
*/
if (NULL==ppl)
return POLYLINE_E_INVALIDPOINTER;
//Preserve the old rectangle
rcs=m_pl.rc;
/*
* For version 2.0 we perform a straight copy. For version
* 1.0 we copy the 1.0 structure and fill in defaults for
* the 2.0 additions.
*/
switch (ppl->wVerMaj)
{
case VERSIONMAJOR: //2.x
switch (ppl->wVerMin)
{
case VERSIONMINOR: //2.0
m_pl=*ppl;
break;
default:
return POLYLINE_E_UNSUPPORTEDVERSION;
}
break;
case 1: //1.x
switch (ppl->wVerMin)
{
case 0: //1.0
*((PPOLYLINEDATA10)&m_pl)=
*((PPOLYLINEDATA10)ppl);
/*
* Update this structure to 2.0. Note that we
* assume whoever loaded us to save the loaded
* version so it can later ask what version
* the user wants to save.
*/
m_pl.wVerMaj=VERSIONMAJOR;
m_pl.wVerMin=VERSIONMINOR;
/*
* Version 1.0 stored rc in parent coordinates.
* We need those now in our client coodinates.
*/
RECTSTORECT(m_pl.rc, rc);
OffsetRect(&rc, -m_pl.rc.left, -m_pl.rc.top);
/*
* 1.0 data had points relative to size of the
* rectangle. We need to scale these to 0-32767
* independent of the rectangle for the version
* upgrade.
*/
for (i=0; i < m_pl.cPoints; i++)
PointScale(&rc, &m_pl.rgpt[i], FALSE);
RECTTORECTS(rc, m_pl.rc);
//New 2.0 features
m_pl.rgbBackground=GetSysColor(COLOR_WINDOW);
m_pl.rgbLine=GetSysColor(COLOR_WINDOWTEXT);
m_pl.iLineStyle=PS_SOLID;
break;
default:
return POLYLINE_E_UNSUPPORTEDVERSION;
}
break;
default:
return POLYLINE_E_UNSUPPORTEDVERSION;
}
//Inform our parent of the data change
if (NULL!=m_pAdv)
m_pAdv->OnDataChange();
/*
* If we're scaling the window to fit the data, then use
* RectSet passing our current rectangle as the new one.
* That makes sure that the data won't change but that the
* window is resized.
*/
if (fSizeToData)
{
POINT pt;
/*
* Get our offset in the parent window so we can RectSet
* to the right place since RectSet expects rectangle in
* parent coordinates and we get it in client coordinates.
*/
GetWindowRect(m_hWnd, &rc);
pt.x=rc.left;
pt.y=rc.top;
ScreenToClient(GetParent(m_hWnd), &pt);
RECTSTORECT(m_pl.rc, rc);
OffsetRect(&rc, pt.x, pt.y);
//This will also cause a repaint.
RectSet(&rc, fNotify);
}
else
{
//Make sure we're updated.
InvalidateRect(m_hWnd, NULL, TRUE);
UpdateWindow(m_hWnd);
}
return POLYLINE_E_NONE;
}
/*
* CPolyline::DataGet
*
* Purpose:
* Retrieves the Polyline's current data.
*
* Parameters:
* ppl PPOLYLINEDATA into which we copy the data.
* lVer LONG version of the data to retrieve. Use
* VERSIONCURRENT to retrieve the most current.
*
* Return Value:
* LONG A POLYLINE_E_* value
*/
LONG CPolyline::DataGet(PPOLYLINEDATA ppl, LONG lVer)
{
UINT i;
RECT rc;
//Retieve the current version
if (lVer==MAKELONG(VERSIONMINOR, VERSIONMAJOR)
|| VERSIONCURRENT==lVer)
{
*ppl=m_pl;
return POLYLINE_E_NONE;
}
//Check for versions we support, 1.x
if (HIWORD(lVer)!=1)
return POLYLINE_E_UNSUPPORTEDVERSION;
if (LOWORD(lVer)==0) //Check for 1.0
{
//Do 2.0 to 1.0 conversion
*((PPOLYLINEDATA10)ppl)=*((PPOLYLINEDATA10)&m_pl);
RECTSTORECT(ppl->rc, rc);
//Get the parent coordinates of our rectangle
if (!IsWindow(m_hWnd))
OffsetRect(&rc, 8, 8); //This is always the offset.
else
RectGet(&rc);
/*
* 1.0 data has points relative to size of the rectangle.
* We need to scale these from 0-32767 so we have the
* right values.
*/
for (i=0; i < ppl->cPoints; i++)
PointScale(&rc, &ppl->rgpt[i], TRUE);
RECTTORECTS(rc, ppl->rc);
//Insure old version numbers.
ppl->wVerMaj=1;
ppl->wVerMin=0;
((PPOLYLINEDATA10)ppl)->fDrawEntire=TRUE;
return POLYLINE_E_NONE;
}
return POLYLINE_E_UNSUPPORTEDVERSION;
}
/*
* CPolyline::DataSetMem
*
* Purpose:
* Sets the Polyline's data using a global memory handle
* instead of a pointer.
*
* Parameters:
* hMem HGLOBAL containing the data.
* fFree BOOL indicating if we're to free the data.
* The memory will be freed regardless of any
* error returned from here.
* fSizeToData BOOL indicating if we're to size to the data
* or scale it.
* fNotify BOOL indicating if we're to send an advise
* on this change.
*
* Return Value:
* LONG A POLYLINE_E_* value.
*/
LONG CPolyline::DataSetMem(HGLOBAL hMem, BOOL fFree
, BOOL fSizeToData, BOOL fNotify)
{
PPOLYLINEDATA ppl;
LONG lRet=POLYLINE_E_INVALIDPOINTER;
if (NULL!=hMem)
{
ppl=(PPOLYLINEDATA)GlobalLock(hMem);
lRet=DataSet(ppl, fSizeToData, fNotify);
GlobalUnlock(hMem);
if (fFree)
GlobalFree(hMem);
}
return lRet;
}
/*
* CPolyline::DataGetMem
*
* Purpose:
* Retrieves the Polyline's data in a global memory handle.
*
* Parameters:
* lVer LONG version of data to retrieve.
* phMem HGLOBAL * in which to store the handle.
*
* Return Value:
* LONG A POLYLINE_E_* value.
*/
LONG CPolyline::DataGetMem(LONG lVer, HGLOBAL *phMem)
{
HGLOBAL hMem;
PPOLYLINEDATA ppl;
LONG lRet;
if (NULL==phMem)
return POLYLINE_E_INVALIDPOINTER;
hMem=GlobalAlloc(GMEM_DDESHARE | GMEM_MOVEABLE
, CBPOLYLINEDATA);
if (NULL!=hMem)
{
ppl=(PPOLYLINEDATA)GlobalLock(hMem);
lRet=DataGet(ppl, lVer);
GlobalUnlock(hMem);
if (POLYLINE_E_NONE!=lRet)
{
GlobalFree(hMem);
hMem=NULL;
}
}
*phMem=hMem;
return lRet;
}
/*
* CPolyline::RectGet
*
* Purpose:
* Returns the rectangle of the Polyline in parent coordinates.
*
* Parameters:
* pRect LPRECT in which to return the rectangle.
*
* Return Value:
* None
*/
void CPolyline::RectGet(LPRECT pRect)
{
RECT rc;
POINT pt;
//Retrieve the size of our rectangle in parent coordinates.
GetWindowRect(m_hWnd, &rc);
pt.x=rc.left;
pt.y=rc.top;
ScreenToClient(GetParent(m_hWnd), &pt);
SetRect(pRect, pt.x, pt.y, pt.x+(rc.right-rc.left)
, pt.y+(rc.bottom-rc.top));
return;
}
/*
* CPolyline::SizeGet
*
* Purpose:
* Retrieves the size of the Polyline in parent coordinates.
*
* Parameters:
* pRect LPRECT in which to return the size. The right
* and bottom fields will contain the dimensions.
*
* Return Value:
* None
*/
void CPolyline::SizeGet(LPRECT pRect)
{
RectGet(pRect);
return;
}
/*
* CPolyline::RectSet
*
* Purpose:
* Sets a new rectangle for the Polyline which sizes to fit.
*
* Parameters:
* pRect LPRECT containing the new rectangle.
* fNotify BOOL indicating if we're to notify anyone of
* the change.
*
* Return Value:
* None
*/
void CPolyline::RectSet(LPRECT pRect, BOOL fNotify)
{
UINT cx, cy;
RECT rc;
//Scale the points from our current size to the new size
cx=pRect->right-pRect->left;
cy=pRect->bottom-pRect->top;
SetWindowPos(m_hWnd, NULL, pRect->left, pRect->top
, cx, cy, SWP_NOZORDER);
SetRect(&rc, 0, 0, cx, cy);
RECTTORECTS(rc, m_pl.rc);
if (fNotify && NULL!=m_pAdv)
m_pAdv->OnSizeChange();
InvalidateRect(m_hWnd, NULL, TRUE);
return;
}
/*
* CPolyline::SizeSet
*
* Purpose:
* Sets a new size for the Polyline which sizes to fit.
*
* Parameters:
* pRect LPRECT containing the new rectangle.
* fNotify BOOL indicating if we're to notify anyone of
* the change.
*
* Return Value:
* None
*/
void CPolyline::SizeSet(LPRECT pRect, BOOL fNotify)
{
UINT cx, cy;
//Scale the points from our current size to the new size
cx=pRect->right-pRect->left;
cy=pRect->bottom-pRect->top;
SetWindowPos(m_hWnd, NULL, 0, 0, (UINT)cx, (UINT)cy
, SWP_NOMOVE | SWP_NOZORDER);
if (fNotify && NULL!=m_pAdv)
m_pAdv->OnSizeChange();
InvalidateRect(m_hWnd, NULL, TRUE);
return;
}
/*
* CPolyline::ColorSet
*
* Purpose:
* Changes for background or line color in the Polyline
*
* Parameters:
* iColor UINT index of the color to change.
* cr COLORREF new color to use.
*
* Return Value:
* COLORREF Previous color for the index iColor.
*/
COLORREF CPolyline::ColorSet(UINT iColor, COLORREF cr)
{
COLORREF crRet;
switch (iColor)
{
case POLYLINECOLOR_BACKGROUND:
crRet=m_pl.rgbBackground;
m_pl.rgbBackground=cr;
break;
case POLYLINECOLOR_LINE:
crRet=m_pl.rgbLine;
m_pl.rgbLine=cr;
break;
}
//If the color changed, repaint
if (crRet!=cr)
{
if (NULL!=m_pAdv)
m_pAdv->OnColorChange();
InvalidateRect(m_hWnd, NULL, TRUE);
UpdateWindow(m_hWnd);
}
return crRet;
}
/*
* CPolyline::ColorGet
*
* Purpose:
* Retrieves one of the colors currently in use by the Polyline.
*
* Parameters:
* iColor UINT identifying the color of interest.
*
* Return Value:
* COLORREF Current color for iColor.
*/
COLORREF CPolyline::ColorGet(UINT iColor)
{
COLORREF crRet;
crRet=(POLYLINECOLOR_BACKGROUND==iColor)
? m_pl.rgbBackground : m_pl.rgbLine;
return crRet;
}
/*
* CPolyline::LineStyleSet
*
* Purpose:
* Changes the line style in use by the Polyline
*
* Parameters:
* iStyle UINT style of the line to use.
*
* Return Value:
* UINT Previous style.
*/
UINT CPolyline::LineStyleSet(UINT iStyle)
{
UINT uRet=(UINT)m_pl.iLineStyle;
//Validate the line style
if (PS_SOLID==iStyle || PS_DASH==iStyle || PS_DOT==iStyle
|| PS_DASHDOT==iStyle || PS_DASHDOTDOT==iStyle)
{
m_pl.iLineStyle=iStyle;
if (uRet!=(UINT)m_pl.iLineStyle)
{
if (NULL!=m_pAdv)
m_pAdv->OnLineStyleChange();
InvalidateRect(m_hWnd, NULL, TRUE);
UpdateWindow(m_hWnd);
}
}
return uRet;
}
/*
* CPolyline::LineStyleGet
*
* Purpose:
* Retrieves the current line style in use in the Polyline
*
* Parameters:
* None
*
* Return Value:
* UINT Current line style.
*/
UINT CPolyline::LineStyleGet(void)
{
return m_pl.iLineStyle;
}
/*
* CPolyline::RenderBitmap
*
* Purpose:
* Creates a bitmap image of the current Polyline.
*
* Parameters:
* None
*
* Return Value:
* HBITMAP Handle to the newly rendered bitmap.
*/
HBITMAP CPolyline::RenderBitmap(void)
{
HDC hDC;
HDC hMemDC;
HBITMAP hBmp;
RECT rc;
HGDIOBJ hObj;
//Render a bitmap the size of the current rectangle.
hDC=GetDC(m_hWnd);
hMemDC=CreateCompatibleDC(hDC);
GetClientRect(m_hWnd, &rc);
hBmp=CreateCompatibleBitmap(hDC, rc.right, rc.bottom);
if (NULL!=hBmp)
{
//Draw the POLYLINEDATA into the bitmap.
hObj=SelectObject(hMemDC, hBmp);
Draw(hMemDC, FALSE, TRUE);
SelectObject(hMemDC, hObj);
}
DeleteDC(hMemDC);
ReleaseDC(m_hWnd, hDC);
return hBmp;
}
/*
* CPolyline::RenderMetafile
*
* Purpose:
* Renders the current image of the Polyline into a metafile.
*
* Parameters:
* None
*
* Return Value:
* HMETAFILE Handle to the newly created metafile.
*/
HMETAFILE CPolyline::RenderMetafile(void)
{
HDC hDC;
HMETAFILE hMF;
RECT rc;
//Create a memory metafile and return its handle.
hDC=(HDC)CreateMetaFile(NULL);
hMF=NULL;
if (NULL!=hDC)
{
/*
* This is absolutely essential to the metafile so it
* can be scaled in the clipboard and any destination
* application.
*/
SetMapMode(hDC, MM_ANISOTROPIC);
GetClientRect(m_hWnd, &rc);
SetWindowOrgEx(hDC, 0, 0, NULL);
SetWindowExtEx(hDC, rc.right, rc.bottom, NULL);
Draw(hDC, TRUE, TRUE);
hMF=CloseMetaFile(hDC);
}
return hMF;
}
/*
* CPolyline::RenderMetafilePict
*
* Purpose:
* Renders the current Polyline into a METAFILEPICT structure in
* global memory.
*
* Parameters:
* None
*
* Return Value:
* HGLOBAL Memory containing the METAFILEPICT structure.
*/
HGLOBAL CPolyline::RenderMetafilePict(void)
{
HGLOBAL hMem;
HMETAFILE hMF;
LPMETAFILEPICT pMF;
RECT rc;
//Get the metafile
hMF=RenderMetafile();
if (NULL==hMF)
return NULL;
//Allocate the METAFILEPICT structure.
hMem=GlobalAlloc(GMEM_DDESHARE | GMEM_MOVEABLE
, sizeof(METAFILEPICT));
if (NULL==hMem)
{
DeleteMetaFile(hMF);
return NULL;
}
/*
* Global lock only fails in PMODE if the selector is invalid
* (like it was discarded) or references a 0 length segment,
* neither of which can happen here.
*/
pMF=(LPMETAFILEPICT)GlobalLock(hMem);
pMF->hMF=hMF;
pMF->mm=MM_ANISOTROPIC;
//Insert the extents in MM_HIMETRIC units.
GetClientRect(m_hWnd, &rc);
RectConvertMappings(&rc, FALSE);
pMF->xExt=rc.right;
pMF->yExt=rc.bottom;
GlobalUnlock(hMem);
return hMem;
}
/*
* CPolyline::RectConvertMappings
*
* Purpose:
* Converts the contents of a rectangle from device (MM_TEXT) or
* HIMETRIC to the other.
*
* Parameters:
* pRect LPRECT containing the rectangle to convert.
* fToDevice BOOL TRUE to convert from HIMETRIC to device,
* FALSE to convert device to HIMETRIC.
*
* Return Value:
* None
*/
void CPolyline::RectConvertMappings(LPRECT pRect, BOOL fToDevice)
{
HDC hDC;
int iLpx, iLpy;
if (NULL==pRect)
return;
hDC=GetDC(NULL);
iLpx=GetDeviceCaps(hDC, LOGPIXELSX);
iLpy=GetDeviceCaps(hDC, LOGPIXELSY);
ReleaseDC(NULL, hDC);
if (fToDevice)
{
pRect->left=MulDiv(iLpx, pRect->left, HIMETRIC_PER_INCH);
pRect->top =MulDiv(iLpy, pRect->top , HIMETRIC_PER_INCH);
pRect->right=MulDiv(iLpx, pRect->right, HIMETRIC_PER_INCH);
pRect->bottom=MulDiv(iLpy, pRect->bottom,HIMETRIC_PER_INCH);
#ifdef NEVER
/*
* In this conversion we may get situations where the top
* coordinate is larger than the bottom, which messes us up.
*/
if (pRect->bottom < pRect->top)
{
iLpy=pRect->top;
pRect->top=pRect->bottom;
pRect->bottom=iLpy;
}
#endif
}
else
{
pRect->left=MulDiv(pRect->left, HIMETRIC_PER_INCH, iLpx);
pRect->top =MulDiv(pRect->top , HIMETRIC_PER_INCH, iLpy);
pRect->right =MulDiv(pRect->right, HIMETRIC_PER_INCH, iLpx);
pRect->bottom=MulDiv(pRect->bottom,HIMETRIC_PER_INCH, iLpy);
}
return;
}