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#include "stdafx.h"
#include "ComboBoxEx.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CAutoComplete
CAutoComplete::CAutoComplete()
{
m_bAutoComplete = TRUE;
}
CAutoComplete::~CAutoComplete()
{
}
BEGIN_MESSAGE_MAP(CAutoComplete, CComboBox)
//{{AFX_MSG_MAP(CAutoComplete)
ON_CONTROL_REFLECT(CBN_EDITUPDATE, OnEditUpdate)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CAutoComplete message handlers
BOOL CAutoComplete::PreTranslateMessage(MSG* pMsg)
{
// Need to check for backspace/delete. These will modify the text in
// the edit box, causing the auto complete to just add back the text
// the user has just tried to delete.
if (pMsg->message == WM_KEYDOWN)
{
m_bAutoComplete = TRUE;
int nVirtKey = (int) pMsg->wParam;
if (nVirtKey == VK_DELETE || nVirtKey == VK_BACK)
m_bAutoComplete = FALSE;
}
return CComboBox::PreTranslateMessage(pMsg);
}
void CAutoComplete::OnEditUpdate()
{
// if we are not to auto update the text, get outta here
if (!m_bAutoComplete)
return;
// Get the text in the edit box
CString str;
GetWindowText(str);
int nLength = str.GetLength();
// Currently selected range
DWORD dwCurSel = GetEditSel();
WORD dStart = LOWORD(dwCurSel);
WORD dEnd = HIWORD(dwCurSel);
// Search for, and select in, and string in the combo box that is prefixed
// by the text in the edit box
if (SelectString(-1, str) == CB_ERR)
{
SetWindowText(str); // No text selected, so restore what was there before
if (dwCurSel != CB_ERR)
SetEditSel(dStart, dEnd); //restore cursor postion
}
// Set the text selection as the additional text that we have added
if (dEnd < nLength && dwCurSel != CB_ERR)
SetEditSel(dStart, dEnd);
else
SetEditSel(nLength, -1);
}
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