demopsheet.cpp

这是MFC经典问答书的光盘内容

// DemoPSheet.cpp : implementation file
//

#include "stdafx.h"
#include "ResizePropertySheet.h"

#include "DemoPSheet.h"

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

/////////////////////////////////////////////////////////////////////////////
// CDemoPSheet

IMPLEMENT_DYNAMIC(CDemoPSheet, CPropertySheet)

CDemoPSheet::CDemoPSheet(CWnd* pParentWnd, UINT iSelectPage)
	:CPropertySheet(IDS_PSHEET_CAPTION, pParentWnd, iSelectPage)
{
	AddPage( &m_CoordsPPage );	// First page
	AddPage( &m_ShapePPage );	// Second page
}

CDemoPSheet::~CDemoPSheet()
{
}


BEGIN_MESSAGE_MAP(CDemoPSheet, CPropertySheet)
	//{{AFX_MSG_MAP(CDemoPSheet)
		// NOTE - the ClassWizard will add and remove mapping macros here.
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

///////////////////////////////////////////////////////////
// EkResizePropertySheet

void EkResizePropertySheet( CPropertySheet* pPSheet, int nWidth )
{
	ASSERT_VALID( pPSheet );

	// 1 - Get current dimensions of tab control
	// and property sheet window
	CTabCtrl* pTabCtrl = pPSheet->GetTabControl();
	ASSERT( pTabCtrl != NULL );

	CRect rcTabCtrl;
	pTabCtrl->GetWindowRect( &rcTabCtrl );
	pPSheet->ScreenToClient( &rcTabCtrl );

	CRect rcPSheet;
	pPSheet->GetWindowRect( &rcPSheet );

	// 2 - Compute resizing offset
	int dcx = rcPSheet.Width() - nWidth;

	// 3 - Resize property sheet window
	pPSheet->SetWindowPos(	NULL,
							0, 0,
							nWidth,
							rcPSheet.Height(), 
							SWP_NOZORDER | SWP_NOMOVE | SWP_NOACTIVATE );


	// 4 - Resize tab control window to restore
	// right margin
	pTabCtrl->SetWindowPos(	NULL,
							0, 0,
							rcTabCtrl.Width() - dcx,
							rcTabCtrl.Height(), 
							SWP_NOZORDER | SWP_NOMOVE | SWP_NOACTIVATE );

	// 5 - Activate each property page to prevent drawing
	// problem
	int nCurrentPage = pPSheet->GetActiveIndex();
	for( int i = 0; i < pPSheet->GetPageCount(); ++i )
	{
		pPSheet->SetActivePage( i );
	}

	pPSheet->SetActivePage( nCurrentPage );
}

///////////////////////////////////////////////////////////
// EkHidePropertySheetButtons

void EkHidePropertySheetButtons(	CPropertySheet* pPSheet,
									BOOL bHideOK,
									BOOL bHideCancel, 
									BOOL bHideApply )
{
	ASSERT_VALID( pPSheet );

	// Hide "OK" button
	if( bHideOK )
	{
		CWnd* pWnd = pPSheet->GetDlgItem( IDOK );
		ASSERT( pWnd != NULL );
		pWnd->ShowWindow( SW_HIDE );
	}

	// Hide "Cancel" button
	if( bHideCancel )
	{
		CWnd* pWnd = pPSheet->GetDlgItem( IDCANCEL );
		ASSERT( pWnd != NULL );
		pWnd->ShowWindow( SW_HIDE );
	}

	// Hide "Apply" button
	if( bHideApply )
	{
		CWnd* pWnd = pPSheet->GetDlgItem( ID_APPLY_NOW );
		ASSERT( pWnd != NULL );
		pWnd->ShowWindow( SW_HIDE );
	}
}

///////////////////////////////////////////////////////////
// EkCenterPropertySheetButtons

void EkCenterPropertySheetButtons(	CPropertySheet* pPSheet,
									BOOL bCenterOK,
									BOOL bCenterCancel,
									BOOL bCenterApply )
{
	ASSERT_VALID( pPSheet );
	ASSERT( bCenterOK || bCenterCancel || bCenterApply );

	// Find "OK" button rectangle
	CWnd* pWndOK = pPSheet->GetDlgItem( IDOK );
	ASSERT( pWndOK != NULL );
	CRect rcOK;
	pWndOK->GetWindowRect( &rcOK );
	pPSheet->ScreenToClient( &rcOK );

	// Find "Cancel" button rectangle
	CWnd* pWndCancel = pPSheet->GetDlgItem( IDCANCEL );
	ASSERT( pWndCancel != NULL );
	CRect rcCancel;
	pWndCancel->GetWindowRect( &rcCancel );
	pPSheet->ScreenToClient( &rcCancel );

	// Find "Apply" button rectangle
	CWnd* pWndApply = pPSheet->GetDlgItem( ID_APPLY_NOW );
	ASSERT( pWndApply != NULL );
	CRect rcApply;
	pWndApply->GetWindowRect( &rcApply );
	pPSheet->ScreenToClient( &rcApply );

	// Find property sheet client rectangle
	CRect rcClient;
	pPSheet->GetClientRect( &rcClient );

	// Compute layout values
	int nButtonWidth = rcOK.Width();
	int nButtonMargin = rcCancel.left - rcOK.right;
	int nButtons = (bCenterOK ? 1 : 0) + (bCenterCancel ? 1 : 0)
						+ (bCenterApply ? 1 : 0);
	int nGlobalWidth = nButtonWidth * nButtons;
	if( nButtons > 1 )
	{
		nGlobalWidth += nButtonMargin * (nButtons - 1);
	}

	int nCurrentX = ( rcClient.left + rcClient.right - nGlobalWidth ) / 2;
	int nTop = rcOK.top;

	// Center "OK" button
	if( bCenterOK )
	{
		pWndOK->SetWindowPos(		NULL,
									nCurrentX,
									nTop,
									0, 0,
									SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE );

		nCurrentX += nButtonWidth + nButtonMargin;
	}

	// Center "Cancel" button
	if( bCenterCancel )
	{
		pWndCancel->SetWindowPos(	NULL,
									nCurrentX,
									nTop,
									0, 0,
									SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE );

		nCurrentX += nButtonWidth + nButtonMargin;
	}

	// Center "Apply" button
	if( bCenterApply )
	{
		pWndApply->SetWindowPos(	NULL,
									nCurrentX,
									nTop,
									0, 0,
									SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE );
	}
}

/////////////////////////////////////////////////////////////////////////////
// CDemoPSheet message handlers

BOOL CDemoPSheet::OnInitDialog() 
{
	BOOL bResult = CPropertySheet::OnInitDialog();

	EkResizePropertySheet( this, 200 );
		// Note : 200 width determined by trial and error

	// Hide "Apply" button
	EkHidePropertySheetButtons( this, FALSE, FALSE, TRUE );

	// Center "OK" and "Cancel" buttons in property sheet
	EkCenterPropertySheetButtons( this, TRUE, TRUE, FALSE );

	return bResult;
}