ngwindowplacement.cpp

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////////////////////////////////////////////////////////////////
// CNGWindowPlacement Copyright 1996 Microsoft Systems Journal.
// If this code works, it was written by Paul DiLascia.
// If not, I don't know who wrote it.

#include "StdAfx.h"
#include "NGWindowPlacement.h"


/////////////////////////////////////////////////////////////////////////////
//	Helpers for saving/restoring window state
//	(taken from the MFC SuperPad sample)

static TCHAR szSection[]	= _T("Settings");
static TCHAR szWindowPos[]	= _T("WindowPos");
static TCHAR szFormat[]		= _T("%u,%u,%d,%d,%d,%d,%d,%d,%d,%d");


NGLIB_EXT_API BOOL ReadWindowPlacement(LPWINDOWPLACEMENT pwp)
{
	CString strBuffer = AfxGetApp()->GetProfileString(szSection, szWindowPos);
	if (strBuffer.IsEmpty())
		return FALSE;

	WINDOWPLACEMENT wp;
	int nRead = sscanf(strBuffer, szFormat,
		&wp.flags, &wp.showCmd,
		&wp.ptMinPosition.x, &wp.ptMinPosition.y,
		&wp.ptMaxPosition.x, &wp.ptMaxPosition.y,
		&wp.rcNormalPosition.left, &wp.rcNormalPosition.top,
		&wp.rcNormalPosition.right, &wp.rcNormalPosition.bottom);

	if (nRead != 10)
		return FALSE;

	wp.length = sizeof wp;
	*pwp = wp;
	return TRUE;
}


// Write a window placement to settings section of app's ini file
NGLIB_EXT_API void WriteWindowPlacement(LPWINDOWPLACEMENT pwp)
{
	TCHAR szBuffer[sizeof(_T("-32767"))*8 + sizeof(_T("65535"))*2];

	sprintf(szBuffer, szFormat,
		pwp->flags, pwp->showCmd,
		pwp->ptMinPosition.x, pwp->ptMinPosition.y,
		pwp->ptMaxPosition.x, pwp->ptMaxPosition.y,
		pwp->rcNormalPosition.left, pwp->rcNormalPosition.top,
		pwp->rcNormalPosition.right, pwp->rcNormalPosition.bottom);

	AfxGetApp()->WriteProfileString(szSection, szWindowPos, szBuffer);
}



BOOL CNGWindowPlacement::ParsePlacementString(const CString& sBuffer)
{
	if (!sBuffer.IsEmpty())
	{
		int nRead = sscanf( sBuffer,
							szFormat,
							&flags,
							&showCmd,
							&ptMinPosition.x, &ptMinPosition.y,
							&ptMaxPosition.x, &ptMaxPosition.y,
							&rcNormalPosition.left, &rcNormalPosition.top,
							&rcNormalPosition.right, &rcNormalPosition.bottom);

		if (10 == nRead)
			return TRUE;
	}
	return FALSE;
}


CString CNGWindowPlacement::BuildPlacementString(void)
{
   	TCHAR szBuffer[sizeof(_T("-32767"))*8 + sizeof(_T("65535"))*2];

	sprintf(	szBuffer,
				szFormat,
				flags, showCmd,
				ptMinPosition.x, ptMinPosition.y,
				ptMaxPosition.x, ptMaxPosition.y,
				rcNormalPosition.left, rcNormalPosition.top,
				rcNormalPosition.right, rcNormalPosition.bottom);

	return szBuffer;
}


CNGWindowPlacement::CNGWindowPlacement()
{
	// Note: "length" is inherited from WINDOWPLACEMENT
	length = sizeof(WINDOWPLACEMENT);
}

CNGWindowPlacement::~CNGWindowPlacement()
{
}



//////////////////
// Restore window placement from profile key
//
BOOL CNGWindowPlacement::Restore(LPCSTR lpKeyName, CWnd* pWnd)
{
	if (GetProfileWP(lpKeyName))
	{
		// Only restore if window intersects the screen.
		//
		CRect rcTemp, rcScreen(0,0,GetSystemMetrics(SM_CXSCREEN),
			GetSystemMetrics(SM_CYSCREEN));
		if (!::IntersectRect(&rcTemp, &rcNormalPosition, &rcScreen))
			return FALSE;

		pWnd->SetWindowPlacement(this);	// set placement

		return TRUE;
	}
	return FALSE;
}


//////////////////
// Get window placement from profile.
//
BOOL CNGWindowPlacement::GetProfileWP(LPCSTR lpKeyName)
{
	CWinApp *pApp = AfxGetApp();
	ASSERT_VALID(pApp);

	CString sBuffer = AfxGetApp()->GetProfileString(lpKeyName, szWindowPos);

	if (ParsePlacementString(sBuffer))
		return TRUE;

	return FALSE;
}

////////////////
// Save window placement in app profile
//
BOOL CNGWindowPlacement::Save(LPCSTR lpKeyName, CWnd* pWnd)
{
	pWnd->GetWindowPlacement(this);

	return WriteProfileWP(lpKeyName);
}

//////////////////
// Write window placement to app profile
//
BOOL CNGWindowPlacement::WriteProfileWP(LPCSTR lpKeyName)
{
	CString sBuffer = BuildPlacementString();
	if (!sBuffer.IsEmpty())
	{
		AfxGetApp()->WriteProfileString(lpKeyName, szWindowPos, sBuffer);

		return TRUE;
	}
	return FALSE;
}


// The ugly casts are required to help the VC++ 3.0 compiler decide which
// operator<< or operator>> to use. If you're using VC++ 4.0 or later, you 
// can delete this stuff.
//
#if (_MSC_VER < 1000)		// 1000 = VC++ 4.0
#define UINT_CAST (LONG)
#define UINT_CASTREF (LONG&)
#else
#define UINT_CAST
#define UINT_CASTREF
#endif

//////////////////
// Write window placement to archive
// WARNING: archiving functions are untested.
//
CArchive& operator<<(CArchive& ar, const CNGWindowPlacement& wp)
{
	ar << UINT_CAST wp.length;
   ar << UINT_CAST wp.flags;
	ar << UINT_CAST wp.showCmd;
   ar << wp.ptMinPosition;
   ar << wp.ptMaxPosition;
   ar << wp.rcNormalPosition;
	return ar;
}

//////////////////
// Read window placement from archive
// WARNING: archiving functions are untested.
//
CArchive& operator>>(CArchive& ar, CNGWindowPlacement& wp)
{
	ar >> UINT_CASTREF wp.length;
   ar >> UINT_CASTREF wp.flags;
	ar >> UINT_CASTREF wp.showCmd;
   ar >> wp.ptMinPosition;
   ar >> wp.ptMaxPosition;
   ar >> wp.rcNormalPosition;
	return ar;
}