ODLIST.CPP

//--odlist.cpp---------------------------------------------------------------- 
// 
// implementation of the COwnerDrawListBox class 
// 
// Copyright (C) Microsoft Corp. 1986-1996.  All Rights Reserved. 
//---------------------------------------------------------------------------- 
 
#include "stdafx.h" 
#include "oditem.h" 
#include "odlist.h" 
#include "miscgdi.h"  
 
#ifdef _DEBUG 
#undef THIS_FILE 
static char BASED_CODE THIS_FILE[] = __FILE__; 
#endif 
 
///////////////////////////////////////////////////////////////////////////// 
// COwnerDrawListBox 
 
IMPLEMENT_DYNCREATE(COwnerDrawListBox, CListBox) 
 
BEGIN_MESSAGE_MAP(COwnerDrawListBox, CListBox) 
    //{{AFX_MSG_MAP(COwnerDrawListBox) 
    ON_WM_GETDLGCODE() 
    //}}AFX_MSG_MAP 
END_MESSAGE_MAP() 
 
COwnerDrawListBox::COwnerDrawListBox () 
{ 
    m_nCurSel = -1; 
} 
 
COwnerDrawListBox::~COwnerDrawListBox () 
{ 
} 
 
int COwnerDrawListBox::SetCurSel (int index) 
{ 
    if ((index != LB_ERR) && (index < GetCount())) 
    { 
        COwnerDrawItem *pODI = GetODI (index); 
        ASSERTERROR (pODI != NULL, "No owner draw item object found"); 
     
        if (pODI->m_dwFlags & ODI_DISABLED) // can not select disabled item 
        { 
            MessageBeep (0); 
            // check if previous selection is not disabled and if so - find undesabled one 
            COwnerDrawItem *pODIPrev = GetODI (m_nCurSel); 
            COwnerDrawItem *pODINext; 
            int             nCount   = GetCount (); 
            int             i; 
                                       
            // select first enabled                                       
            if (pODIPrev->m_dwFlags & ODI_DISABLED)           
            { 
                m_nCurSel = -1; 
                for (i = 0; i < nCount; i++) 
                { 
                    pODINext = GetODI (i); 
                    ASSERTERROR (pODINext != NULL,"No owner draw item found"); 
                    if (!(pODINext->m_dwFlags & ODI_DISABLED)) 
                    { 
                        m_nCurSel = i; 
                        break; 
                    }     
                }     
            } 
        }                                     
        else 
        { 
            m_nCurSel = index; 
        }     
    }     
    else 
    { 
        m_nCurSel = index; 
    }                  
     
    return CListBox::SetCurSel (m_nCurSel); 
} 
     
void COwnerDrawListBox::EnableString (int index, BOOL bEnable) 
{ 
    ASSERTERROR (index != LB_ERR, "Invalid index used"); 
     
    COwnerDrawItem *pODI = GetODI (index); 
    ASSERTERROR (pODI != NULL, "No owner draw item found"); 
     
    if (bEnable) 
    { 
        pODI->m_dwFlags &= ~(DWORD) ODI_DISABLED; 
        pODI->m_crText   = RGB (0, 0, 0); 
    } 
    else 
    { 
        pODI->m_dwFlags |= ODI_DISABLED;  
        pODI->m_crText   = GetSysColor (COLOR_GRAYTEXT); 
    }         
} 
 
///////////////////////////////////////////////////////////////////////////// 
// COwnerDrawListBox diagnostics 
 
#ifdef _DEBUG 
void COwnerDrawListBox::AssertValid() const 
{ 
    CListBox::AssertValid(); 
} 
 
void COwnerDrawListBox::Dump(CDumpContext& dc) const 
{ 
    CListBox::Dump(dc); 
} 
#endif //_DEBUG 
 
///////////////////////////////////////////////////////////////////////////// 
// COwnerDrawListBox commands 
 
///////////////////////////////////////////////////////////////////////////// 
// OWNER DRAW stuff 
 
void COwnerDrawListBox::MeasureItem(LPMEASUREITEMSTRUCT lpMIS) 
{ 
    // all items are of fixed size 
    // must use LBS_OWNERDRAWVARIABLE for this to work 
    lpMIS->itemHeight = 20; 
} 
 
void COwnerDrawListBox::DrawItem(LPDRAWITEMSTRUCT lpDIS) 
{ 
    ::DrawItem (lpDIS);     
} 
 
void COwnerDrawListBox::DeleteItem(LPDELETEITEMSTRUCT lpDeleteItemStruct) 
{ 
    COwnerDrawItem *pItem = (COwnerDrawItem *)lpDeleteItemStruct->itemData; 
    ASSERT_VALID (pItem); 
     
    if (pItem->m_dwFlags & ODI_DELOBJECT) 
        delete pItem->m_pObject; 
                 
    delete pItem;    
    SendMessage (LB_SETITEMDATA, lpDeleteItemStruct->itemID, NULL);   
} 
 
UINT COwnerDrawListBox::OnGetDlgCode() 
{ 
    return (DLGC_WANTMESSAGE | CListBox::OnGetDlgCode()); 
} 
                                         
#ifdef _DEBUG 
#define _MSX_INLINE 
#include "odlist.inl" 
#endif