Tricks of the Windows Gam…ming Gurus (2nd Edition)/Disc2.iso/msdn_vcb/samples/vc98/mfc/database/mdibind/rdcdlg.cpp

C/C++ Source or Header | 1998-03-26 | 6KB | 171 lines

// RDCDlg.cpp : implementation file
//
// This is a part of the Microsoft Foundation Classes C++ library.
// Copyright (C) 1992-1998 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 "MDIBind.h"
#include "rdc.h"
#include "MDIDoc.h"
#include "mainfrm.h"
#include "RDCFrm.h"
#include "RDCDlg.h"
#include "rdocols.h"
#include "rdocol.h"
#include "rdoReslt.h"

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

/////////////////////////////////////////////////////////////////////////////
// COpenControlsDlg dialog


COpenControlsDlg::COpenControlsDlg(const CMDIBindDoc* pDocument,CWnd* pParent /*=NULL*/)
    : CDialog(COpenControlsDlg::IDD, pParent)
{
    //{{AFX_DATA_INIT(COpenControlsDlg)
    m_ColName = pDocument->m_boundCol;
    //}}AFX_DATA_INIT
    if(pDocument->m_pRDC!=NULL)
        m_pRDCView=(CRDCView*) pDocument->m_pRDC->GetParent();
        //you could change m_pRDCView to ponter to RDC itself
    else
        m_pRDCView=NULL;
    m_CurrentSel=-1;
}


void COpenControlsDlg::DoDataExchange(CDataExchange* pDX)
{
    CDialog::DoDataExchange(pDX);
    //{{AFX_DATA_MAP(COpenControlsDlg)
    DDX_CBString(pDX, IDC_COLUMN, m_ColName);
    //}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(COpenControlsDlg, CDialog)
    //{{AFX_MSG_MAP(COpenControlsDlg)
    ON_CBN_DROPDOWN(IDC_COLUMN, OnDropdownColumns)
    //}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// COpenControlsDlg message handlers

BOOL COpenControlsDlg::OnInitDialog()
{
    CDialog::OnInitDialog();

    CListBox* pListBox = (CListBox*) GetDlgItem(IDC_RDCLIST);

    CMainFrame* pMainFrame = (CMainFrame*) AfxGetApp()->m_pMainWnd;
    ASSERT(pMainFrame->IsKindOf(RUNTIME_CLASS(CMainFrame)));
    // iterate through all MDI windows
    CMDIChildWnd* pMDIChild = pMainFrame->MDIGetActive();
    if(pMDIChild != NULL)
        pMDIChild = (CRDCFrame*) pMDIChild->GetWindow(GW_HWNDLAST);
    while (pMDIChild != NULL)
    {
        CString strTitle;
        int nIndex;
        if(pMDIChild->IsKindOf(RUNTIME_CLASS(CRDCFrame)))
        { // only RDC windows
            CRDCView* pRDCView = (CRDCView*)pMDIChild->GetActiveView();
            ASSERT(pRDCView->IsKindOf(RUNTIME_CLASS(CRDCView)));
            // get the window's title
            pMDIChild->GetWindowText(strTitle);
            strTitle=strTitle+_T(": ")+pRDCView->m_pRDCCtl->GetCaption();
            // add the window to the list
            nIndex = pListBox->AddString(strTitle);

            if(m_pRDCView!=NULL &&
                pRDCView==m_pRDCView) // you'd compare RDC themselves as well
            {   // select nIndex item only if
                // m_pRDCCtl==the control currenty assigned
                pListBox->SetCurSel(nIndex);
            }
            // store a pointer to the frame
            pListBox->SetItemData(nIndex, (DWORD)pMDIChild);
        }
        pMDIChild = (CRDCFrame*) pMDIChild->GetWindow(GW_HWNDPREV);
    } // while

    int cElements = pListBox->GetCount();
    pListBox->SetFocus();

    return TRUE;  // return TRUE unless you set the focus to a control
                  // EXCEPTION: OCX Property Pages should return FALSE
}

void COpenControlsDlg::OnOK()
{
    CListBox* pListBox = (CListBox*) GetDlgItem(IDC_RDCLIST);
    int cElements = pListBox->GetCount();
    int nSelection= pListBox->GetCurSel();  // get the selected item

    if(cElements > 0 && nSelection >= 0)
    {   // can only select a window if at least one item is selected
        // get the pointer to the frame
        m_pMDIChild = (CRDCFrame*) pListBox->GetItemData(nSelection);
        ASSERT(m_pMDIChild->IsKindOf(RUNTIME_CLASS(CRDCFrame)));
        // now use ActiveView() rather than MDIActivate()
        // get a pointer to the active view in the frame
        m_pRDCView = (CRDCView*) m_pMDIChild->GetActiveView();
        ASSERT(m_pRDCView->IsKindOf(RUNTIME_CLASS(CRDCView)));
    } //if

    CDialog::OnOK();
}

/////////////////////////////////////////////////////////////////////////////
// Refill the Combo List with columns names from currently selected RDC
void COpenControlsDlg::OnDropdownColumns()
{
    CListBox* pListBox = (CListBox*) GetDlgItem(IDC_RDCLIST);
    CComboBox* pComboBox = (CComboBox*) GetDlgItem(IDC_COLUMN);

    int nSelection=pListBox->GetCurSel();
    if(nSelection<0 || nSelection==m_CurrentSel)
        return; // nothing to change in Combo box
    m_CurrentSel=nSelection;
    pComboBox->ResetContent( ); // clear old columns

    m_pMDIChild = (CRDCFrame*) pListBox->GetItemData(nSelection);
    ASSERT(m_pMDIChild->IsKindOf(RUNTIME_CLASS(CRDCFrame)));
    // now use ActiveView() rather than MDIActivate()
    // get a pointer to the active view in the frame
    m_pRDCView = (CRDCView*) m_pMDIChild->GetActiveView();
    ASSERT(m_pRDCView->IsKindOf(RUNTIME_CLASS(CRDCView)));

    CRdc* pRDC=m_pRDCView->m_pRDCCtl;
    ASSERT(pRDC!=NULL);

    CrdoResultset pResult;  // resultset from RDC
    CrdoColumns pColumns;   // columns from resultset

    pResult=pRDC->GetResultset();
    if(pResult!=NULL && (pColumns=pResult.GetRdoColumns())!=NULL)
    {
        long ncol=pColumns.GetCount();
        CrdoColumn pCol; // element from columns collection
        for(long icol=0; icol<ncol; icol++)
        {
            pCol=pColumns.GetItem(COleVariant(icol)); //get i-column
            pComboBox->AddString(pCol.GetName());//add its name to the list
        }
        pComboBox->SetCurSel(0); // no old element valid if new RDC
    }
}