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Borland C++ V5.02
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CTRLTS.PAK
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PAREDIT.CPP
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C/C++ Source or Header
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1997-05-06
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4KB
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131 lines
// paredit.cpp: C++ derived edit control for numbers/letters etc
//
// This is a part of the Microsoft Foundation Classes C++ library.
// Copyright (C) 1992-1995 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 "ctrltest.h"
#include "paredit.h"
/////////////////////////////////////////////////////////////////////////////
// ParsedEdit
CParsedEdit::CParsedEdit()
{
m_wParseStyle = 0;
}
BEGIN_MESSAGE_MAP(CParsedEdit, CEdit)
//{{AFX_MSG_MAP(CParsedEdit)
ON_WM_CHAR()
ON_WM_VSCROLL() // for associated spin controls
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// Creating from C++ code
BOOL CParsedEdit::Create(DWORD dwStyle, const RECT& rect,
CWnd* pParentWnd, UINT nID)
{
m_wParseStyle = LOWORD(dwStyle);
// figure out edit control style
DWORD dwEditStyle = MAKELONG(ES_LEFT, HIWORD(dwStyle));
return CWnd::Create(_T("EDIT"), NULL, dwEditStyle, rect, pParentWnd, nID);
}
/////////////////////////////////////////////////////////////////////////////
// Aliasing on top of an existing Edit control
BOOL CParsedEdit::SubclassEdit(UINT nID, CWnd* pParent, WORD wParseStyle)
{
m_wParseStyle = wParseStyle;
return SubclassDlgItem(nID, pParent);
}
/////////////////////////////////////////////////////////////////////////////
// Input character filter
void CParsedEdit::OnChar(UINT nChar, UINT nRepCnt, UINT nFlags)
{
WORD type;
if (nChar < 0x20)
type = PES_ALL; // always allow control chars
else if (IsCharAlphaNumeric((TCHAR)nChar) && !IsCharAlpha((TCHAR)nChar))
type = PES_NUMBERS;
else if (IsCharAlpha((TCHAR)nChar))
type = PES_LETTERS;
else
type = PES_OTHERCHARS;
if (m_wParseStyle & type)
{
CEdit::OnChar(nChar, nRepCnt, nFlags); // permitted
}
else
{
// illegal character - inform parent
OnBadInput();
}
}
/////////////////////////////////////////////////////////////////////////////
// Spin controls will send scroll messages
void CParsedEdit::OnVScroll(UINT nSBCode, UINT, CScrollBar*)
{
int nDelta = 0;
if (nSBCode == SB_LINEDOWN)
nDelta = -1;
else if (nSBCode == SB_LINEUP)
nDelta = +1;
else
return; // nothing special
// set the focus to this edit item and select it all
SetFocus();
//Get the number in the control.
BOOL bOk;
int nOld = GetParent()->GetDlgItemInt(GetDlgCtrlID(), &bOk);
if (bOk)
{
// The MuScrl32 control also supports range checking
// for this example, we just prevent overflow
int nNew = nOld + nDelta;
if (nNew >= 0 && nNew <= 32767)
GetParent()->SetDlgItemInt(GetDlgCtrlID(), nNew);
else
bOk = FALSE;
}
if (!bOk)
OnBadInput();
SetSel(0, -1);
}
/////////////////////////////////////////////////////////////////////////////
// default bad input handler, beep (unless parent notification
// returns -1. Most parent dialogs will return 0 or 1 for command
// handlers (i.e. Beep is the default)
void CParsedEdit::OnBadInput()
{
if (GetParent()->SendMessage(WM_COMMAND,
MAKELONG(GetDlgCtrlID(), PEN_ILLEGALCHAR), (LPARAM)m_hWnd) != -1)
{
MessageBeep((UINT)-1);
}
}
/////////////////////////////////////////////////////////////////////////////