ddxm.cpp

VC++写的仿Windows系统的写字板程序

// ddxm.cpp : implementation file
// Download by http://www.codefans.net
// This is a part of the Microsoft Foundation Classes C++ library.
// Copyright (C) 1992-1998 Microsoft Corporation
// All rights reserved.
//
// This source code is only intended as a supplement to the
// Microsoft Foundation Classes Reference and related
// electronic documentation provided with the library.
// See these sources for detailed information regarding the
// Microsoft Foundation Classes product.

#include "stdafx.h"
#include "ddxm.h"
#include "wordpad.h"
#include "resource.h"

// this routine prints a floatingpoint number with 2 digits after the decimal
void PASCAL DDX_Twips(CDataExchange* pDX, int nIDC, int& value)
{
	HWND hWndCtrl = pDX->PrepareEditCtrl(nIDC);
	TCHAR szT[64];

	if (pDX->m_bSaveAndValidate)
	{
		::GetWindowText(hWndCtrl, szT, sizeof(szT));
		if (szT[0] != NULL) // not empty
		{
			if (!theApp.ParseMeasurement(szT, value))
			{
				AfxMessageBox(IDS_INVALID_MEASUREMENT,MB_OK|MB_ICONINFORMATION);
				pDX->Fail();            // throws exception
			}
			theApp.PrintTwips(szT, value, 2);
			theApp.ParseMeasurement(szT, value);
		}
		else // empty
			value = INT_MAX;
	}
	else
	{
		// convert from twips to default units
		if (value != INT_MAX)
		{
			theApp.PrintTwips(szT, value, 2);
			SetWindowText(hWndCtrl, szT);
		}
	}
}

void PASCAL DDV_MinMaxTwips(CDataExchange* pDX, int value, int minVal, int maxVal)
{
	ASSERT(minVal <= maxVal);
	if (value < minVal || value > maxVal)
	{
		// "The measurement must be between %1 and %2."
		if (!pDX->m_bSaveAndValidate)
		{
			TRACE0("Warning: initial dialog data is out of range.\n");
			return;     // don't stop now
		}
		TCHAR szMin[32];
		TCHAR szMax[32];
		theApp.PrintTwips(szMin, minVal, 2);
		theApp.PrintTwips(szMax, maxVal, 2);
		CString prompt;
		AfxFormatString2(prompt, IDS_MEASUREMENT_RANGE, szMin, szMax);
		AfxMessageBox(prompt, MB_ICONEXCLAMATION, AFX_IDS_APP_TITLE);
		prompt.Empty(); // exception prep
		pDX->Fail();
	}
}