inplacecombo.cpp

一个非常好的WINCE界面

//InPlaceCombo.cpp
#include "stdafx.h"
#include "InPlaceCombo.h"

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

/////////////////////////////////////////////////////////////////////////////
// CInPlaceCombo

CInPlaceCombo* CInPlaceCombo::m_pInPlaceCombo = NULL; 

CInPlaceCombo::CInPlaceCombo()
{
    m_iRowIndex = -1;
    m_iColumnIndex = -1;
    m_bESC = FALSE;
}

CInPlaceCombo::~CInPlaceCombo()
{
}

BEGIN_MESSAGE_MAP(CInPlaceCombo, CComboBox)
    //{{AFX_MSG_MAP(CInPlaceCombo)
    ON_WM_CREATE()
    ON_WM_KILLFOCUS()
    ON_WM_CHAR()
    ON_CONTROL_REFLECT(CBN_CLOSEUP, OnCloseup)
    //}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CInPlaceCombo message handlers

int CInPlaceCombo::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
    if (CComboBox::OnCreate(lpCreateStruct) == -1)
    {
        return -1;
    }

    // Set the proper font
    CFont* pFont = GetParent()->GetFont();
    SetFont(pFont);

    SetFocus();

    ResetContent(); 
    for (POSITION Pos_ = m_DropDownList.GetHeadPosition(); Pos_ != NULL;)
    {
        AddString((LPCTSTR) (m_DropDownList.GetNext(Pos_)));
    }

    return 0;
}

BOOL CInPlaceCombo::PreTranslateMessage(MSG* pMsg) 
{
    // If the message if for "Enter" or "Esc"
    // Do not process
    if (pMsg->message == WM_KEYDOWN)
    {
        if(pMsg->wParam == VK_RETURN || pMsg->wParam == VK_ESCAPE)
        {
            ::TranslateMessage(pMsg);
            ::DispatchMessage(pMsg);
            // DO NOT process further
            return TRUE;    
        }
    }

    return CComboBox::PreTranslateMessage(pMsg);
}

void CInPlaceCombo::OnKillFocus(CWnd* pNewWnd) 
{
    CComboBox::OnKillFocus(pNewWnd);

    // Get the current selection text
    CString str;
    GetWindowText(str);

    // Send Notification to parent of ListView ctrl
    LV_DISPINFO dispinfo;
    dispinfo.hdr.hwndFrom = GetParent()->m_hWnd;
    dispinfo.hdr.idFrom = GetDlgCtrlID();
    dispinfo.hdr.code = LVN_ENDLABELEDIT;

    dispinfo.item.mask = LVIF_TEXT;
    dispinfo.item.iItem = m_iRowIndex;
    dispinfo.item.iSubItem = m_iColumnIndex;
    dispinfo.item.pszText = m_bESC ? LPTSTR((LPCTSTR)m_strWindowText) : LPTSTR((LPCTSTR)str);
    dispinfo.item.cchTextMax = m_bESC ? m_strWindowText.GetLength() : str.GetLength();

    GetParent()->SendMessage(WM_NOTIFY, GetParent()->GetDlgCtrlID(), (LPARAM)&dispinfo);

    // Close the control
    PostMessage(WM_CLOSE);
}

void CInPlaceCombo::OnChar(UINT nChar, UINT nRepCnt, UINT nFlags) 
{
    // If the key is "Esc" set focus back to the list control
    if (nChar == VK_ESCAPE || nChar == VK_RETURN)
    {
        if (nChar == VK_ESCAPE)
        {
            m_bESC = TRUE;
        }

        GetParent()->SetFocus();
        return;
    }

    CComboBox::OnChar(nChar, nRepCnt, nFlags);
}

void CInPlaceCombo::OnCloseup() 
{
    // Set the focus to the parent list control
    GetParent()->SetFocus();
}

CInPlaceCombo* CInPlaceCombo::GetInstance()
{
    if(m_pInPlaceCombo == NULL)
    {
        m_pInPlaceCombo = new CInPlaceCombo;
    }
    return m_pInPlaceCombo;
}

void CInPlaceCombo::DeleteInstance()
{
    delete m_pInPlaceCombo;
    m_pInPlaceCombo = NULL;
}

BOOL CInPlaceCombo::ShowComboCtrl(DWORD dwStyle, const CRect &rCellRect, CWnd* pParentWnd, UINT uiResourceID,
                                  int iRowIndex, int iColumnIndex, CStringList* pDropDownList, 
                                  CString strCurSelecetion /*= ""*/, int iCurSel /*= -1*/)
{
    m_iRowIndex = iRowIndex;
    m_iColumnIndex = iColumnIndex;
    m_bESC = FALSE;

    m_DropDownList.RemoveAll(); 
    m_DropDownList.AddTail(pDropDownList);

    BOOL bRetVal = TRUE;

    if (-1 != iCurSel)
    {
        GetLBText(iCurSel, m_strWindowText);
    }
    else if (!strCurSelecetion.IsEmpty()) 
    {
        m_strWindowText = strCurSelecetion;
    }

    if (NULL == m_pInPlaceCombo->m_hWnd) 
    {
        bRetVal = m_pInPlaceCombo->Create(dwStyle, rCellRect, pParentWnd, uiResourceID); 
    }

    SetCurSel(iCurSel);

    return bRetVal;
}