CtrlDragList.cpp

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//
// CtrlDragList.cpp
//
// Copyright (c) Shareaza Development Team, 2002-2005.
// This file is part of SHAREAZA (www.shareaza.com)
//
// Shareaza is free software; you can redistribute it
// and/or modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2 of
// the License, or (at your option) any later version.
//
// Shareaza is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Shareaza; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//

#include "StdAfx.h"
#include "Shareaza.h"
#include "CtrlDragList.h"
#include "LiveList.h"

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

IMPLEMENT_DYNAMIC(CDragListCtrl, CListCtrl)

BEGIN_MESSAGE_MAP(CDragListCtrl, CListCtrl)
        //{{AFX_MSG_MAP(CDragListCtrl)
        ON_NOTIFY_REFLECT(LVN_BEGINDRAG, OnBeginDrag)
        ON_WM_MOUSEMOVE()
        ON_WM_LBUTTONUP()
        //}}AFX_MSG_MAP
END_MESSAGE_MAP()


// CDragListCtrl construction

CDragListCtrl::CDragListCtrl()
{
        m_pDragImage            = NULL;
        m_bCreateDragImage      = FALSE;
}

CDragListCtrl::~CDragListCtrl()
{
}

// CDragListCtrl message handlers

void CDragListCtrl::OnBeginDrag(NMHDR* pNMHDR, LRESULT* pResult)
{
        NM_LISTVIEW* pNMListView = (NM_LISTVIEW*)pNMHDR;
        *pResult = 0;

        CPoint ptAction( pNMListView->ptAction );

        m_bCreateDragImage = TRUE;
        m_pDragImage = CLiveList::CreateDragImage( this, ptAction );
        m_bCreateDragImage = FALSE;

        if ( m_pDragImage == NULL ) return;
        m_nDragDrop = -1;

        UpdateWindow();

        CRect rcClient;
        GetClientRect( &rcClient );
        ClientToScreen( &rcClient );
        ClipCursor( &rcClient );
        SetCapture();

        SetFocus();
        UpdateWindow();

        m_pDragImage->DragEnter( this, ptAction );
}

void CDragListCtrl::OnMouseMove(UINT nFlags, CPoint point)
{
        if ( m_pDragImage != NULL )
        {
                int nHit = HitTest( point );

                m_pDragImage->DragMove( point );

                if ( nHit != m_nDragDrop )
                {
                        CImageList::DragShowNolock( FALSE );
                        if ( m_nDragDrop >= 0 ) SetItemState( m_nDragDrop, 0, LVIS_DROPHILITED );
                        m_nDragDrop = nHit;
                        if ( m_nDragDrop >= 0 ) SetItemState( m_nDragDrop, LVIS_DROPHILITED, LVIS_DROPHILITED );
                        UpdateWindow();
                        CImageList::DragShowNolock( TRUE );
                }
        }

        CListCtrl::OnMouseMove( nFlags, point );
}

void CDragListCtrl::OnLButtonUp(UINT nFlags, CPoint point)
{
        if ( m_pDragImage == NULL )
        {
                CListCtrl::OnLButtonUp( nFlags, point );
                return;
        }

        ClipCursor( NULL );
        ReleaseCapture();

        m_pDragImage->DragLeave( this );
        m_pDragImage->EndDrag();
        delete m_pDragImage;
        m_pDragImage = NULL;

        if ( m_nDragDrop >= 0 )
                SetItemState( m_nDragDrop, 0, LVIS_DROPHILITED );
        //else
        //      m_nDragDrop = GetItemCount();

        OnDragDrop( m_nDragDrop );
}

void CDragListCtrl::OnDragDrop(int nDrop)
{
        NM_LISTVIEW pNotify;
        pNotify.hdr.hwndFrom    = GetSafeHwnd();
        pNotify.hdr.idFrom              = GetDlgCtrlID();
        pNotify.hdr.code                = LVN_DRAGDROP;
        pNotify.iItem                   = nDrop;
        GetOwner()->SendMessage( WM_NOTIFY, pNotify.hdr.idFrom, (LPARAM)&pNotify );
}

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