demodlg.cpp

来自「《MFC经典问答》pdf格式 拿出来大家共享一下」· C++ 代码 · 共 92 行

// DemoDlg.cpp : implementation file
//

#include "stdafx.h"
#include "ValidationRules.h"
#include "DemoDlg.h"

#include "DrawDoc.h"

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

/////////////////////////////////////////////////////////////////////////////
// CDemoDlg dialog


CDemoDlg::CDemoDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CDemoDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CDemoDlg)
	m_nX = 0;
	m_nY = 0;
	m_nShape = -1;
	//}}AFX_DATA_INIT
}


void CDemoDlg::DoDataExchange(CDataExchange* pDX)
{
	// 1 - Standard Class-Wizard-generated stuff

	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CDemoDlg)
	DDX_Control(pDX, IDC_SHAPE, m_cmbShape);
	DDX_Control(pDX, IDC_Y, m_edtY);
	DDX_Control(pDX, IDC_X, m_edtX);
	DDX_Text(pDX, IDC_X, m_nX);
	DDX_Text(pDX, IDC_Y, m_nY);
	DDX_CBIndex(pDX, IDC_SHAPE, m_nShape);
	//}}AFX_DATA_MAP

	// 2 - Here come our custom validation rules
	if( m_nShape == CDrawDoc::SQUARE )
	{
		// 3 - Validate "100 < X < 300"
		pDX->PrepareEditCtrl( IDC_X );
		DDV_MinMaxInt( pDX, m_nX, 100, 300 );

		// 4 - Validate "100 < Y < 300"
		pDX->PrepareEditCtrl( IDC_Y );
		DDV_MinMaxInt( pDX, m_nY, 100, 300 );
	}
	else
	{
		// 5 - Validate "0 < X < 100"
		pDX->PrepareEditCtrl( IDC_X );
		DDV_MinMaxInt( pDX, m_nX, 0, 100 );

		// 6 - Validate "0 < Y < 100"
		pDX->PrepareEditCtrl( IDC_Y );
		DDV_MinMaxInt( pDX, m_nY, 0, 100 );

		// 7 - Validate "Y >= X" (custom validation)
		pDX->PrepareEditCtrl( IDC_Y );
		if( pDX->m_bSaveAndValidate && m_nY < m_nX )
		{
			// 8 - Display error message to the user
			CString prompt;
			prompt.Format( "Error: Y (%d) should be greater than X (%d).",
							m_nY, m_nX );
			AfxMessageBox( prompt, MB_ICONEXCLAMATION );
			prompt.Empty(); // exception prep

			// 9 - Fail the validation
			pDX->Fail();	// note: throws a CUserException
		}
	}
}


BEGIN_MESSAGE_MAP(CDemoDlg, CDialog)
	//{{AFX_MSG_MAP(CDemoDlg)
		// NOTE: the ClassWizard will add message map macros here
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CDemoDlg message handlers