MFC組合框，搜索字體列表

Question

如何使用A-z keydown事件在Combobox中執行搜索？更糟糕的是，這是工具欄中的CMFCToolBarButton。

這是帶有字體列表的comboB。只需要選擇一個keydown。 謝謝！

Answer 1

這是解決方案。 工作正常。

void C_dropDlg::OnEditUpdate() 
{ 
    if (!m_bAutoComplete) 
     return; 

    // Get the text in the edit box 
     CString str; 
     MyDropDown.GetWindowText(str); 
     int nLength = str.GetLength(); 

     // Currently selected range 
     DWORD dwCurSel = MyDropDown.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 (MyDropDown.SelectString(-1, str) == CB_ERR) 
     { 
      SetWindowText(str);  // No text selected, so restore what was there before 
      if (dwCurSel != CB_ERR) 
      MyDropDown.SetEditSel(dStart, dEnd); //restore cursor postion 
     } 

    // Set the text selection as the additional text that we have added 
      if (dEnd < nLength && dwCurSel != CB_ERR) 
       MyDropDown.SetEditSel(dStart, dEnd); 
      else 
       MyDropDown.SetEditSel(nLength, -1); 

} 
    // TODO: Add your control notification handler code here 





BOOL C_dropDlg::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; 
     if(nVirtKey == VK_ESCAPE) 
     { 

     } 
    } 

    return CDialogEx::PreTranslateMessage(pMsg); 

}

我已經失去了與解決方案的鏈接，但感謝作者。

不要忘記在基類中定義m_AutoComplete！