Click here to Skip to main content
12,353,602 members (66,670 online)
Click here to Skip to main content

Stats

52.7K views
2.5K downloads
38 bookmarked
Posted

Progress Cell for Grid Control.

, 10 May 2004
A new cell progress-bar-like type for Chris Maunder's Grid Control.
// GridDropTarget.cpp : implementation file
//
// MFC Grid Control - Drag/Drop target implementation
//
// CGridDropTarget is an OLE drop target for CGridCtrl. All it does
// is handle the drag and drop windows messages and pass them
// directly onto the grid control.
//
// Written by Chris Maunder <cmaunder@mail.com>
// Copyright (c) 1998-2002. All Rights Reserved.
//
// This code may be used in compiled form in any way you desire. This
// file may be redistributed unmodified by any means PROVIDING it is 
// not sold for profit without the authors written consent, and 
// providing that this notice and the authors name and all copyright 
// notices remains intact. 
//
// An email letting me know how you are using it would be nice as well. 
//
// This file is provided "as is" with no expressed or implied warranty.
// The author accepts no liability for any damage/loss of business that
// this product may cause.
//
// For use with CGridCtrl v2.10+
//
/////////////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "GridCtrl.h"

#ifndef GRIDCONTROL_NO_DRAGDROP
#include "GridDropTarget.h"

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

/////////////////////////////////////////////////////////////////////////////
// CGridDropTarget

CGridDropTarget::CGridDropTarget()
{
    m_pGridCtrl = NULL;
    m_bRegistered = FALSE;
}

CGridDropTarget::~CGridDropTarget()
{
}

// Overloaded Register() function performs the normal COleDropTarget::Register
// but also serves to connect this COleDropTarget with the parent grid control,
// where all drop messages will ultimately be forwarded.
BOOL CGridDropTarget::Register(CGridCtrl *pGridCtrl)
{
    if (m_bRegistered)
        return FALSE;

    // Stop re-entry problems
    static BOOL bInProcedure = FALSE;
    if (bInProcedure)
        return FALSE;
    bInProcedure = TRUE;

    ASSERT(pGridCtrl->IsKindOf(RUNTIME_CLASS(CGridCtrl)));
    ASSERT(pGridCtrl);

    if (!pGridCtrl || !pGridCtrl->IsKindOf(RUNTIME_CLASS(CGridCtrl)))
    {
        bInProcedure = FALSE;
        return FALSE;
    }

    m_pGridCtrl = pGridCtrl;

    m_bRegistered = COleDropTarget::Register(pGridCtrl);

    bInProcedure = FALSE;
    return m_bRegistered;
}

void CGridDropTarget::Revoke()
{
    m_bRegistered = FALSE;
    COleDropTarget::Revoke();
}

BEGIN_MESSAGE_MAP(CGridDropTarget, COleDropTarget)
    //{{AFX_MSG_MAP(CGridDropTarget)
    //}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CGridDropTarget message handlers

DROPEFFECT CGridDropTarget::OnDragScroll(CWnd* pWnd, DWORD dwKeyState, CPoint /*point*/)
{
//    TRACE("In CGridDropTarget::OnDragScroll\n");
    if (pWnd->GetSafeHwnd() == m_pGridCtrl->GetSafeHwnd())
    {
        if (dwKeyState & MK_CONTROL)
            return DROPEFFECT_COPY;
        else
            return DROPEFFECT_MOVE;
    } else
        return DROPEFFECT_NONE;
}

DROPEFFECT CGridDropTarget::OnDragEnter(CWnd* pWnd, COleDataObject* pDataObject, 
                                        DWORD dwKeyState, CPoint point)
{
    TRACE(_T("In CGridDropTarget::OnDragEnter\n"));
    ASSERT(m_pGridCtrl);

    if (pWnd->GetSafeHwnd() == m_pGridCtrl->GetSafeHwnd())
        return m_pGridCtrl->OnDragEnter(pDataObject, dwKeyState, point);
    else
        return DROPEFFECT_NONE;
}

void CGridDropTarget::OnDragLeave(CWnd* pWnd)
{
    TRACE(_T("In CGridDropTarget::OnDragLeave\n"));
    ASSERT(m_pGridCtrl);

    if (pWnd->GetSafeHwnd() == m_pGridCtrl->GetSafeHwnd())
        m_pGridCtrl->OnDragLeave();
}

DROPEFFECT CGridDropTarget::OnDragOver(CWnd* pWnd, COleDataObject* pDataObject, 
                                       DWORD dwKeyState, CPoint point)
{
//    TRACE("In CGridDropTarget::OnDragOver\n");
    ASSERT(m_pGridCtrl);

    if (pWnd->GetSafeHwnd() == m_pGridCtrl->GetSafeHwnd())
        return m_pGridCtrl->OnDragOver(pDataObject, dwKeyState, point);
    else
        return DROPEFFECT_NONE;
}

BOOL CGridDropTarget::OnDrop(CWnd* pWnd, COleDataObject* pDataObject,
                             DROPEFFECT dropEffect, CPoint point)
{
    TRACE(_T("In CGridDropTarget::OnDrop\n"));
    ASSERT(m_pGridCtrl);

    if (pWnd->GetSafeHwnd() == m_pGridCtrl->GetSafeHwnd())
        return m_pGridCtrl->OnDrop(pDataObject, dropEffect, point);
    else
        return FALSE;
}

#endif // GRIDCONTROL_NO_DRAGDROP

By viewing downloads associated with this article you agree to the Terms of Service and the article's licence.

If a file you wish to view isn't highlighted, and is a text file (not binary), please let us know and we'll add colourisation support for it.

License

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here

Share

About the Author

Iain Clarke, Warrior Programmer
Software Developer (Senior)
Sweden Sweden
I have now moved to Sweden for love, and recently married a lovely Swede.


-----------------
I started programming on BBC micros (6502) when I was six and never quite stopped even while I was supposed to be studying physics and uni.

I've been working for ~13 years writing software for machine control and data analysis. I now work on financial transaction transformation software, for a Software company in Gamlastan, Stockholm.
Look at my articles to see my excellent coding skills. I'm modest too!

You may also be interested in...

| Advertise | Privacy | Terms of Use | Mobile
Web01 | 2.8.160621.1 | Last Updated 11 May 2004
Article Copyright 2004 by Iain Clarke, Warrior Programmer
Everything else Copyright © CodeProject, 1999-2016
Layout: fixed | fluid