Liren Large Software Subsidy 7/07.iso/c/c480/19.ddi/MFC/SRC/VBDDX.CP_/VBDDX.CP

Text File | 1993-02-08 | 5.4 KB | 187 lines

// This is a part of the Microsoft Classes C++ Class Library.
// Copyright (C) 1992 Microsoft Corporation,
// All rights reserved.
//
// This source code is only intended as a supplement to the
// Microsoft Foundation Classes Reference and Microsoft
// QuickHelp and/or WinHelp documentation provided with the library.
// See these sources for detailed information regarding the
// Microsoft Foundation Classes product.

#include "stdafx.h"

#ifdef AFX_VBX_SEG
#pragma code_seg(AFX_VBX_SEG)
#endif

#ifdef _DEBUG
#undef THIS_FILE
static char BASED_CODE THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// VB specific DDX procs

// VB controls are special
void AFXAPI DDX_VBControl(CDataExchange* pDX, int nIDC, CVBControl*& rpControl)
{
    if (rpControl == NULL)
    {
        ASSERT(!pDX->m_bSaveAndValidate);
        rpControl = pDX->PrepareVBCtrl(nIDC);
    }
}

CVBControl* CDataExchange::PrepareVBCtrl(int nIDC)
{
    ASSERT(nIDC != 0);
    ASSERT(nIDC != -1); // not allowed
    HWND hWndCtrl = ::GetDlgItem(m_pDlgWnd->m_hWnd, nIDC);
    if (hWndCtrl == NULL)
    {
        TRACE1("Error: no data exchange control with ID 0x%04X\n", nIDC);
        ASSERT(FALSE);
        AfxThrowNotSupportedException();
    }
    m_hWndLastControl = hWndCtrl;
    m_bEditLastControl = FALSE; // not an edit item by default
    ASSERT(hWndCtrl != NULL);       // never return NULL handle
    CWnd* pWnd = CWnd::FromHandle(hWndCtrl);
    ASSERT(pWnd->IsKindOf(RUNTIME_CLASS(CVBControl)));
    return (CVBControl*)pWnd;
}

/////////////////////////////////////////////////////////////////////////////
// Simple formatting to text item

void AFXAPI DDX_VBText(CDataExchange* pDX, int nIDC, int nPropIndex,
    CString& value)
{
    CVBControl* pControl = pDX->PrepareVBCtrl(nIDC);
    ASSERT(pControl->GetPropType(nPropIndex) == DT_HSZ);
    if (pDX->m_bSaveAndValidate)
        value = pControl->GetStrProperty(nPropIndex);
    else
        pControl->SetStrProperty(nPropIndex, value);
}

void AFXAPI DDX_VBTextRO(CDataExchange* pDX, int nIDC, int nPropIndex,
    CString& value)
{
    if (pDX->m_bSaveAndValidate)
    {
        CVBControl* pControl = pDX->PrepareVBCtrl(nIDC);
        ASSERT(pControl->GetPropType(nPropIndex) == DT_HSZ);
        value = pControl->GetStrProperty(nPropIndex);
    }
}

/////////////////////////////////////////////////////////////////////////////
// non-text properties

void AFXAPI DDX_VBBool(CDataExchange* pDX, int nIDC, int nPropIndex,
    BOOL& value)
{
    CVBControl* pControl = pDX->PrepareVBCtrl(nIDC);
    ASSERT(pControl->GetPropType(nPropIndex) == DT_BOOL);
    if (pDX->m_bSaveAndValidate)
        value = (BOOL)pControl->GetNumProperty(nPropIndex);
    else
        pControl->SetNumProperty(nPropIndex, value);
}

void AFXAPI DDX_VBBoolRO(CDataExchange* pDX, int nIDC, int nPropIndex,
    BOOL& value)
{
    if (pDX->m_bSaveAndValidate)
    {
        CVBControl* pControl = pDX->PrepareVBCtrl(nIDC);
        ASSERT(pControl->GetPropType(nPropIndex) == DT_BOOL);
        value = (BOOL)pControl->GetNumProperty(nPropIndex);
    }
}

void AFXAPI DDX_VBInt(CDataExchange* pDX, int nIDC, int nPropIndex,
    int& value)
{
    CVBControl* pControl = pDX->PrepareVBCtrl(nIDC);
#ifdef _DEBUG
    UINT nPropType = pControl->GetPropType(nPropIndex);
    ASSERT(nPropType == DT_ENUM || nPropType == DT_SHORT ||
           nPropType == DT_XPOS || nPropType == DT_XSIZE ||
           nPropType == DT_YPOS || nPropType == DT_YSIZE);
#endif
    if (pDX->m_bSaveAndValidate)
        value = (int)pControl->GetNumProperty(nPropIndex);
    else
        pControl->SetNumProperty(nPropIndex, value);
}

void AFXAPI DDX_VBIntRO(CDataExchange* pDX, int nIDC, int nPropIndex,
    int& value)
{
    if (pDX->m_bSaveAndValidate)
    {
        CVBControl* pControl = pDX->PrepareVBCtrl(nIDC);
#ifdef _DEBUG
        UINT nPropType = pControl->GetPropType(nPropIndex);
        ASSERT(nPropType == DT_ENUM || nPropType == DT_SHORT ||
               nPropType == DT_XPOS || nPropType == DT_XSIZE ||
               nPropType == DT_YPOS || nPropType == DT_YSIZE);
#endif
        value = (int)pControl->GetNumProperty(nPropIndex);
    }
}

void AFXAPI DDX_VBLong(CDataExchange* pDX, int nIDC, int nPropIndex,
    LONG& value)
{
    CVBControl* pControl = pDX->PrepareVBCtrl(nIDC);
#ifdef _DEBUG
    UINT nPropType = pControl->GetPropType(nPropIndex);
    ASSERT(nPropType == DT_LONG);
#endif
    if (pDX->m_bSaveAndValidate)
        value = pControl->GetNumProperty(nPropIndex);
    else
        pControl->SetNumProperty(nPropIndex, value);
}

void AFXAPI DDX_VBLongRO(CDataExchange* pDX, int nIDC, int nPropIndex,
    LONG& value)
{
    if (pDX->m_bSaveAndValidate)
    {
        CVBControl* pControl = pDX->PrepareVBCtrl(nIDC);
#ifdef _DEBUG
        UINT nPropType = pControl->GetPropType(nPropIndex);
        ASSERT(nPropType == DT_LONG);
#endif
        value = pControl->GetNumProperty(nPropIndex);
    }
}

void AFXAPI DDX_VBColor(CDataExchange* pDX, int nIDC, int nPropIndex,
    COLORREF& value)
{
    CVBControl* pControl = pDX->PrepareVBCtrl(nIDC);
    ASSERT(pControl->GetPropType(nPropIndex) == DT_COLOR);
    if (pDX->m_bSaveAndValidate)
        value = (COLORREF)pControl->GetNumProperty(nPropIndex);
    else
        pControl->SetNumProperty(nPropIndex, (DWORD)value);
}

void AFXAPI DDX_VBColorRO(CDataExchange* pDX, int nIDC, int nPropIndex,
    COLORREF& value)
{
    if (pDX->m_bSaveAndValidate)
    {
        CVBControl* pControl = pDX->PrepareVBCtrl(nIDC);
        ASSERT(pControl->GetPropType(nPropIndex) == DT_COLOR);
        value = (COLORREF)pControl->GetNumProperty(nPropIndex);
    }
}

/////////////////////////////////////////////////////////////////////////////