src/os2/dnd.cpp

///////////////////////////////////////////////////////////////////////////////
// Name:        dnd.cpp
// Purpose:     wxDropTarget, wxDropSource, wxDataObject implementation
// Author:      David Webster
// Modified by:
// Created:     10/21/99
// RCS-ID:      $Id$
// Copyright:   (c) 1998 AUTHOR
// Licence:     wxWindows licence
///////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#pragma implementation "dnd.h"
#endif

#include "wx/window.h"
#include "wx/app.h"
#include "wx/gdicmn.h"
#include "wx/dnd.h"

#define INCL_PM
#define INCL_DOS
#include <os2.h>

#if wxUSE_DRAG_AND_DROP

// ----------------------------------------------------------------------------
// global
// ----------------------------------------------------------------------------

/////////////////////////////////////////////////////////////////////////////
// Private functions
/////////////////////////////////////////////////////////////////////////////

#if 0
static wxDragResult ConvertDragEffectToResult (
  DWORD                             dwEffect
)
{
    switch (dwEffect)
    {
        case DO_COPY:
            return wxDragCopy;

        case DO_LINK:
            return wxDragLink;

        case DO_MOVE:
            return wxDragMove;

        default:
        case DO_DEFAULT:
            return wxDragNone;
    }
} // end of ConvertDragEffectToResult

static DWORD ConvertDragResultToEffect (
  wxDragResult                      eResult
)
{
    switch (eResult)
    {
        case wxDragCopy:
            return DO_COPY;

        case wxDragLink:
            return DO_LINK;

        case wxDragMove:
            return DO_MOVE;

        default:
        case wxDragNone:
            return DO_DEFAULT;
    }
} // end of ConvertDragResultToEffect
#endif

class CIDropTarget
{
public:
    CIDropTarget(wxDropTarget* pTarget)
    {
        m_pTarget   = pTarget;
        m_pDragItem = NULL;
    }
    virtual ~CIDropTarget() { }

    //
    // Accessors for CDropTarget
    //
    void      Free(void) { ::DrgFreeDraginfo(m_pDragInfo); }
    PDRAGINFO GetDataSource(void) { return m_pDragInfo; }
    void      SetDataSource(PDRAGINFO pDragInfo) { m_pDragInfo = pDragInfo; }
    void      SetHWND(HWND hWnd) { m_hWnd = hWnd; }

    //
    // CIDropTarget methods
    //
           bool    DragLeave(void);
           MRESULT DragOver(void);
           MRESULT Drop(void);

protected:

    PDRAGINFO                       m_pDragInfo;
    PDRAGITEM                       m_pDragItem; // !NULL between DragEnter and DragLeave/Drop
    wxDropTarget*                   m_pTarget;   // the real target (we're just a proxy)
    HWND                            m_hWnd;      // window we're associated with
}; // end of CLASS CIDropTarget

bool CIDropTarget::DragLeave()
{
    //
    // Remove the UI feedback
    //
    m_pTarget->OnLeave();

    //
    // Release the held object
    //
    Free();
    return TRUE;
} // end of CIDropTarget::DragLeave

MRESULT CIDropTarget::DragOver ()
{
    char                            zBuffer[128];
    ULONG                           ulBytes;
    USHORT                          uOp;
    USHORT                          uIndicator;
    ULONG                           ulItems;
    ULONG                           i;

    ::DrgAccessDraginfo(m_pDragInfo);
    switch(m_pDragInfo->usOperation)
    {
        case DO_UNKNOWN:
            Free();
            return (MRFROM2SHORT(DOR_NODROPOP, 0));

        case DO_DEFAULT:
            m_pDragItem = ::DrgQueryDragitemPtr(m_pDragInfo, 0);
            ulBytes     = ::DrgQueryStrName( m_pDragItem->hstrContainerName
                                            ,128
                                            ,zBuffer
                                           );
            if (!ulBytes)
                return (MRFROM2SHORT(DOR_NODROPOP, 0));
            else
                uOp = DO_MOVE;
            break;

        case DO_COPY:
        case DO_MOVE:
            uOp = m_pDragInfo->usOperation;
            break;
    }
    uIndicator = DOR_DROP;
    ulItems = (ULONG)::DrgQueryDragitemCount(m_pDragInfo);
    for (i = 0; i < ulItems; i++)
    {
        m_pDragItem = ::DrgQueryDragitemPtr(m_pDragInfo, i);
        if (((m_pDragItem->fsSupportedOps & DO_COPYABLE) &&
             (uOp == (USHORT)DO_COPY))                   ||
            ((m_pDragItem->fsSupportedOps & DO_MOVEABLE) &&
             (uOp == (USHORT)DO_COPY)))
        {
            if (::DrgVerifyRMF(m_pDragItem, "DRM_OS2FILE", "DRF_UNKNOWN"))
                uIndicator = (USHORT)DOR_DROP;
            else
                uIndicator = (USHORT)DOR_NEVERDROP;
        }
    }
    Free();
    return (MRFROM2SHORT(uIndicator, uOp));
} // end of CIDropTarget::DragOver

// #pragma page   "CIDropTarget::Drop"
/////////////////////////////////////////////////////////////////////////////
//
// CIDropTarget::Drop
//
//   Instructs the drop target to paste data that was just now dropped on it.
//
// PARAMETERS
//   pIDataSource -- the data to paste
//   dwKeyState   -- kbd & mouse state
//   pt           -- mouse coordinates
//   pdwEffect    -- effect flag
//
// RETURN VALUE
//  STDMETHODIMP S_OK
//
/////////////////////////////////////////////////////////////////////////////
MRESULT CIDropTarget::Drop ()
{
    char                            zBuffer[128];
    ULONG                           ulBytes;
    USHORT                          uOp;
    USHORT                          uIndicator;
    ULONG                           ulItems;
    ULONG                           i;

    ::DrgAccessDraginfo(m_pDragInfo);
    switch(m_pDragInfo->usOperation)
    {
        case DO_UNKNOWN:
            Free();
            return (MRFROM2SHORT(DOR_NODROPOP, 0));

        case DO_DEFAULT:
            m_pDragItem = ::DrgQueryDragitemPtr(m_pDragInfo, 0);
            ulBytes     = ::DrgQueryStrName( m_pDragItem->hstrContainerName
                                            ,128
                                            ,zBuffer
                                           );
            if (!ulBytes)
                return (MRFROM2SHORT(DOR_NODROPOP, 0));
            else
                uOp = DO_MOVE;
            break;

        case DO_COPY:
        case DO_MOVE:
            uOp = m_pDragInfo->usOperation;
            break;
    }
    uIndicator = DOR_DROP;
    ulItems = (ULONG)::DrgQueryDragitemCount(m_pDragInfo);
    for (i = 0; i < ulItems; i++)
    {
        m_pDragItem = ::DrgQueryDragitemPtr(m_pDragInfo, i);
        if (((m_pDragItem->fsSupportedOps & DO_COPYABLE) &&
             (uOp == (USHORT)DO_COPY))                   ||
            ((m_pDragItem->fsSupportedOps & DO_MOVEABLE) &&
             (uOp == (USHORT)DO_COPY)))
        {
            if (::DrgVerifyRMF(m_pDragItem, "DRM_OS2FILE", "DRF_UNKNOWN"))
                uIndicator = (USHORT)DOR_DROP;
            else
                uIndicator = (USHORT)DOR_NEVERDROP;
        }
    }

    //
    // First ask the drop target if it wants data
    //
    if (m_pTarget->OnDrop( m_pDragInfo->xDrop
                          ,m_pDragInfo->yDrop
                         ))
    {
        wxDragResult                 eRc;

        //
        // And now it has the data
        //
        eRc = m_pTarget->OnData( m_pDragInfo->xDrop
                                ,m_pDragInfo->yDrop
                                ,eRc
                               );
    }
    //else: OnDrop() returned FALSE, no need to copy data

    //
    // Release the held object
    //
    Free();
    return (MRFROM2SHORT(uIndicator, uOp));
} // end of CIDropTarget::Drop

// ----------------------------------------------------------------------------
// wxDropTarget
// ----------------------------------------------------------------------------

wxDropTarget::wxDropTarget (
  wxDataObject*                     pDataObject
)
{
    m_dataObject  = pDataObject;
    m_pDropTarget = new CIDropTarget(this);
} // end of wxDropTarget::wxDropTarget

wxDropTarget::~wxDropTarget()
{
    Release();
} // end of wxDropTarget::~wxDropTarget

bool wxDropTarget::GetData ()
{
    wxDataFormat                    vFormat = GetSupportedFormat(m_pDropTarget->GetDataSource());

    if (vFormat == wxDF_INVALID)
    {
        return FALSE;
    }
    //
    // Under OS/2 we already have the data via the attached DRAGITEM's
    //
    return TRUE;
} // end of wxDropTarget::GetData

wxDataFormat wxDropTarget::GetSupportedFormat (
  PDRAGINFO                         pDataSource
) const
{
    PDRAGITEM                       pDragItem;
    wxDataFormat                    vFormat;
    wxDataFormat*                   pFormats;
    ULONG                           ulFormats = m_dataObject->GetFormatCount(wxDataObject::Set);
    ULONG                           ulItems = (ULONG)::DrgQueryDragitemCount(pDataSource);
    ULONG                           i;
    ULONG                           n;
    wxString                        sMechanism;
    wxString                        sFormat;
    bool                            bValid = FALSE;

    pFormats = ulFormats == 1 ? &vFormat :  new wxDataFormat[ulFormats];
    m_dataObject->GetAllFormats( pFormats
                                ,wxDataObject::Set
                               );

    for (n = 0; n < ulFormats; n++)
    {
        switch(pFormats[n].GetType())
        {
            case wxDF_TEXT:
            case wxDF_FILENAME:
            case wxDF_HTML:
                sMechanism = "DRM_OS2FILE";
                sFormat    = "DRF_TEXT";
                break;

            case wxDF_OEMTEXT:
                sMechanism = "DRM_OS2FILE";
                sFormat    = "DRF_OEMTEXT";
                break;

            case wxDF_BITMAP:
                sMechanism = "DRM_OS2FILE";
                sFormat    = "DRF_BITMAP";
                break;

            case wxDF_METAFILE:
            case wxDF_ENHMETAFILE:
                sMechanism = "DRM_OS2FILE";
                sFormat    = "DRF_METAFILE";
                break;

            case wxDF_TIFF:
                sMechanism = "DRM_OS2FILE";
                sFormat    = "DRF_TIFF";
                break;

            case wxDF_SYLK:
                sMechanism = "DRM_OS2FILE";
                sFormat    = "DRF_SYLK";
                break;

            case wxDF_DIF:
                sMechanism = "DRM_OS2FILE";
                sFormat    = "DRF_DIF";
                break;

            case wxDF_DIB:
                sMechanism = "DRM_OS2FILE";
                sFormat    = "DRF_DIB";
                break;

            case wxDF_PALETTE:
            case wxDF_PENDATA:
            case wxDF_RIFF:
            case wxDF_WAVE:
            case wxDF_UNICODETEXT:
            case wxDF_LOCALE:
                sMechanism = "DRM_OS2FILE";
                sFormat    = "DRF_UNKNOWN";
                break;

            case wxDF_PRIVATE:
                sMechanism = "DRM_OBJECT";
                sFormat    = "DRF_UNKNOWN";
                break;
        }
        for (i = 0; i < ulItems; i++)
        {
            pDragItem = ::DrgQueryDragitemPtr(pDataSource, i);
            if (::DrgVerifyRMF(pDragItem, sMechanism.c_str(), sFormat.c_str()))
            {
                bValid = TRUE;
                break;
            }
        }
        if (bValid)
        {
            vFormat = pFormats[n];
            break;
        }
    }
    if (pFormats != &vFormat)
    {
        //
        // Free memory if we allocated it
        //
        delete [] pFormats;
    }
    return (n < ulFormats ? vFormat : wxFormatInvalid);
} // end of wxDropTarget::GetSupportedFormat

bool wxDropTarget::IsAcceptedData (
  PDRAGINFO                         pDataSource
) const
{
    return (GetSupportedFormat(pDataSource) != wxDF_INVALID);
} // end of wxDropTarget::IsAcceptedData

void wxDropTarget::Release ()
{
    m_pDropTarget->Free();
} // end of wxDropTarget::Release


wxDragResult wxDropTarget::OnData (
  wxCoord                           WXUNUSED(vX)
, wxCoord                           WXUNUSED(y)
, wxDragResult                      WXUNUSED(vResult)
)
{
    return (wxDragResult)0;
} // end of wxDropTarget::OnData

bool wxDropTarget::OnDrop (
  wxCoord                           WXUNUSED(x)
, wxCoord                           WXUNUSED(y)
)
{
    return TRUE;
} // end of wxDropTarget::OnDrop

//-------------------------------------------------------------------------
// wxDropSource
//-------------------------------------------------------------------------

wxDropSource::wxDropSource (
  wxWindow*                         pWin
)
{
    Init();
} // end of wxDropSource::wxDropSource

wxDropSource::wxDropSource (
  wxDataObject&                     rData
, wxWindow*                         pWin
)
{
    Init();
    SetData(rData);
} // end of wxDropSource::wxDropSource

wxDropSource::~wxDropSource ()
{
    ::DrgFreeDraginfo(m_pDragInfo);
} // end of wxDropSource::~wxDropSource

wxDragResult wxDropSource::DoDragDrop (
  int                              WXUNUSED(flags)
)
{
    //
    // Need to specify drag items in derived classes that know their data types
    // before calling DoDragDrop
    //
    if (::DrgDrag( m_pWindow->GetHWND()
                  ,m_pDragInfo
                  ,&m_vDragImage
                  ,m_ulItems
                  ,VK_BUTTON2
                  ,NULL
                 ) != NULLHANDLE)
    {
        switch(m_pDragInfo->usOperation)
        {
            case DO_COPY:
                return wxDragCopy;

            case DO_MOVE:
                return wxDragCopy;

            case DO_LINK:
                return wxDragCopy;

            default:
                return wxDragNone;
        }
    }
    return wxDragError;
} // end of wxDropSource::DoDragDrop

bool wxDropSource::GiveFeedback (
  wxDragResult                      eEffect
)
{
    const wxCursor&                 rCursor = GetCursor(eEffect);

    if (rCursor.Ok())
    {
        ::WinSetPointer(HWND_DESKTOP, (HPOINTER)rCursor.GetHCURSOR());
        m_vDragImage.hImage = (LHANDLE)rCursor.GetHCURSOR();
        switch(eEffect)
        {
            case wxDragCopy:
                m_pDragInfo->usOperation = DO_COPY;
                break;

            case wxDragMove:
                m_pDragInfo->usOperation = DO_MOVE;
                break;

            case wxDragLink:
                m_pDragInfo->usOperation = DO_LINK;
                break;

            case wxDragNone:
            case wxDragCancel:
            case wxDragError:
                break;
        }
        return TRUE;
    }
    else
    {
        return FALSE;
    }
} // end of GuiAdvDnd_CDropSource::GiveFeedback

void wxDropSource::Init ()
{
    m_pDragInfo = ::DrgAllocDraginfo(m_ulItems);

    //
    // Set a default drag image struct with what we know so far
    //
    m_vDragImage.cb             = sizeof(DRAGIMAGE);
    m_vDragImage.cptl           = 0;  // non-zero if fl is DRG_POLYGON
    m_vDragImage.hImage         = 0;  // Set in GiveFeedback
    m_vDragImage.sizlStretch.cx = 20L;
    m_vDragImage.sizlStretch.cy = 20L;
    m_vDragImage.fl             = DRG_ICON | DRG_STRETCH;
    m_vDragImage.cxOffset       = 0;
    m_vDragImage.cyOffset       = 0;

    HSTR                            hStrType = ::DrgAddStrHandle(DRT_UNKNOWN);
    HSTR                            hStrRMF;
    HSTR                            hStrContainer;
    char                            zFormats[128];
    char                            zContainer[128];
    USHORT                          uSize = GetDataObject()->GetDataSize(GetDataObject()->GetPreferredFormat()) + 1;
    char*                           pzBuffer = new char[uSize];

    memset(pzBuffer, '\0', GetDataObject()->GetDataSize(GetDataObject()->GetPreferredFormat()));
    pzBuffer[GetDataObject()->GetDataSize(GetDataObject()->GetPreferredFormat())] = '\0';
    GetDataObject()->GetDataHere( GetDataObject()->GetPreferredFormat()
                                 ,(void*)pzBuffer
                                );

    strcpy(zFormats, "<DRM_OS2FILE, DRF_UNKNOWN>");
    strcpy(zContainer, GetDataObject()->GetPreferredFormat().GetId().c_str());

    hStrRMF       = ::DrgAddStrHandle(zFormats);
    hStrContainer = ::DrgAddStrHandle(zContainer);

    m_pDragItem = new DRAGITEM[m_ulItems];
    for (ULONG i = 0; i < m_ulItems; i++)
    {
        m_pDragItem[i].hwndItem          = m_pWindow->GetHWND();
        m_pDragItem[i].hstrType          = hStrType;
        m_pDragItem[i].hstrRMF           = hStrRMF;
        m_pDragItem[i].hstrContainerName = hStrContainer;
        m_pDragItem[i].fsControl         = 0;
        m_pDragItem[i].fsSupportedOps    = DO_COPYABLE | DO_MOVEABLE | DO_LINKABLE;
        m_pDragItem[i].hstrSourceName    = ::DrgAddStrHandle(pzBuffer);
        m_pDragItem[i].hstrTargetName    = m_pDragItem[i].hstrSourceName;
        m_pDragItem[i].ulItemID          = i;
        ::DrgSetDragitem( m_pDragInfo
                         ,&m_pDragItem[i]
                         ,sizeof(DRAGITEM)
                         ,0
                        );
    }
    delete [] pzBuffer;
    delete [] m_pDragItem;
} // end of wxDropSource::Init

#endif //wxUSE_DRAG_AND_DROP
Commit	Line	Data
	1	///////////////////////////////////////////////////////////////////////////////
	2	// Name: dnd.cpp
	3	// Purpose: wxDropTarget, wxDropSource, wxDataObject implementation
	4	// Author: David Webster
	5	// Modified by:
	6	// Created: 10/21/99
	7	// RCS-ID: $Id$
	8	// Copyright: (c) 1998 AUTHOR
	9	// Licence: wxWindows licence
	10	///////////////////////////////////////////////////////////////////////////////
	11
	12	#ifdef __GNUG__
	13	#pragma implementation "dnd.h"
	14	#endif
	15
	16	#include "wx/window.h"
	17	#include "wx/app.h"
	18	#include "wx/gdicmn.h"
	19	#include "wx/dnd.h"
	20
	21	#define INCL_PM
	22	#define INCL_DOS
	23	#include <os2.h>
	24
	25	#if wxUSE_DRAG_AND_DROP
	26
	27	// ----------------------------------------------------------------------------
	28	// global
	29	// ----------------------------------------------------------------------------
	30
	31	/////////////////////////////////////////////////////////////////////////////
	32	// Private functions
	33	/////////////////////////////////////////////////////////////////////////////
	34
	35	#if 0
	36	static wxDragResult ConvertDragEffectToResult (
	37	DWORD dwEffect
	38	)
	39	{
	40	switch (dwEffect)
	41	{
	42	case DO_COPY:
	43	return wxDragCopy;
	44
	45	case DO_LINK:
	46	return wxDragLink;
	47
	48	case DO_MOVE:
	49	return wxDragMove;
	50
	51	default:
	52	case DO_DEFAULT:
	53	return wxDragNone;
	54	}
	55	} // end of ConvertDragEffectToResult
	56
	57	static DWORD ConvertDragResultToEffect (
	58	wxDragResult eResult
	59	)
	60	{
	61	switch (eResult)
	62	{
	63	case wxDragCopy:
	64	return DO_COPY;
	65
	66	case wxDragLink:
	67	return DO_LINK;
	68
	69	case wxDragMove:
	70	return DO_MOVE;
	71
	72	default:
	73	case wxDragNone:
	74	return DO_DEFAULT;
	75	}
	76	} // end of ConvertDragResultToEffect
	77	#endif
	78
	79	class CIDropTarget
	80	{
	81	public:
	82	CIDropTarget(wxDropTarget* pTarget)
	83	{
	84	m_pTarget = pTarget;
	85	m_pDragItem = NULL;
	86	}
	87	virtual ~CIDropTarget() { }
	88
	89	//
	90	// Accessors for CDropTarget
	91	//
	92	void Free(void) { ::DrgFreeDraginfo(m_pDragInfo); }
	93	PDRAGINFO GetDataSource(void) { return m_pDragInfo; }
	94	void SetDataSource(PDRAGINFO pDragInfo) { m_pDragInfo = pDragInfo; }
	95	void SetHWND(HWND hWnd) { m_hWnd = hWnd; }
	96
	97	//
	98	// CIDropTarget methods
	99	//
	100	bool DragLeave(void);
	101	MRESULT DragOver(void);
	102	MRESULT Drop(void);
	103
	104	protected:
	105
	106	PDRAGINFO m_pDragInfo;
	107	PDRAGITEM m_pDragItem; // !NULL between DragEnter and DragLeave/Drop
	108	wxDropTarget* m_pTarget; // the real target (we're just a proxy)
	109	HWND m_hWnd; // window we're associated with
	110	}; // end of CLASS CIDropTarget
	111
	112	bool CIDropTarget::DragLeave()
	113	{
	114	//
	115	// Remove the UI feedback
	116	//
	117	m_pTarget->OnLeave();
	118
	119	//
	120	// Release the held object
	121	//
	122	Free();
	123	return TRUE;
	124	} // end of CIDropTarget::DragLeave
	125
	126	MRESULT CIDropTarget::DragOver ()
	127	{
	128	char zBuffer[128];
	129	ULONG ulBytes;
	130	USHORT uOp;
	131	USHORT uIndicator;
	132	ULONG ulItems;
	133	ULONG i;
	134
	135	::DrgAccessDraginfo(m_pDragInfo);
	136	switch(m_pDragInfo->usOperation)
	137	{
	138	case DO_UNKNOWN:
	139	Free();
	140	return (MRFROM2SHORT(DOR_NODROPOP, 0));
	141
	142	case DO_DEFAULT:
	143	m_pDragItem = ::DrgQueryDragitemPtr(m_pDragInfo, 0);
	144	ulBytes = ::DrgQueryStrName( m_pDragItem->hstrContainerName
	145	,128
	146	,zBuffer
	147	);
	148	if (!ulBytes)
	149	return (MRFROM2SHORT(DOR_NODROPOP, 0));
	150	else
	151	uOp = DO_MOVE;
	152	break;
	153
	154	case DO_COPY:
	155	case DO_MOVE:
	156	uOp = m_pDragInfo->usOperation;
	157	break;
	158	}
	159	uIndicator = DOR_DROP;
	160	ulItems = (ULONG)::DrgQueryDragitemCount(m_pDragInfo);
	161	for (i = 0; i < ulItems; i++)
	162	{
	163	m_pDragItem = ::DrgQueryDragitemPtr(m_pDragInfo, i);
	164	if (((m_pDragItem->fsSupportedOps & DO_COPYABLE) &&
	165	(uOp == (USHORT)DO_COPY)) \|\|
	166	((m_pDragItem->fsSupportedOps & DO_MOVEABLE) &&
	167	(uOp == (USHORT)DO_COPY)))
	168	{
	169	if (::DrgVerifyRMF(m_pDragItem, "DRM_OS2FILE", "DRF_UNKNOWN"))
	170	uIndicator = (USHORT)DOR_DROP;
	171	else
	172	uIndicator = (USHORT)DOR_NEVERDROP;
	173	}
	174	}
	175	Free();
	176	return (MRFROM2SHORT(uIndicator, uOp));
	177	} // end of CIDropTarget::DragOver
	178
	179	// #pragma page "CIDropTarget::Drop"
	180	/////////////////////////////////////////////////////////////////////////////
	181	//
	182	// CIDropTarget::Drop
	183	//
	184	// Instructs the drop target to paste data that was just now dropped on it.
	185	//
	186	// PARAMETERS
	187	// pIDataSource -- the data to paste
	188	// dwKeyState -- kbd & mouse state
	189	// pt -- mouse coordinates
	190	// pdwEffect -- effect flag
	191	//
	192	// RETURN VALUE
	193	// STDMETHODIMP S_OK
	194	//
	195	/////////////////////////////////////////////////////////////////////////////
	196	MRESULT CIDropTarget::Drop ()
	197	{
	198	char zBuffer[128];
	199	ULONG ulBytes;
	200	USHORT uOp;
	201	USHORT uIndicator;
	202	ULONG ulItems;
	203	ULONG i;
	204
	205	::DrgAccessDraginfo(m_pDragInfo);
	206	switch(m_pDragInfo->usOperation)
	207	{
	208	case DO_UNKNOWN:
	209	Free();
	210	return (MRFROM2SHORT(DOR_NODROPOP, 0));
	211
	212	case DO_DEFAULT:
	213	m_pDragItem = ::DrgQueryDragitemPtr(m_pDragInfo, 0);
	214	ulBytes = ::DrgQueryStrName( m_pDragItem->hstrContainerName
	215	,128
	216	,zBuffer
	217	);
	218	if (!ulBytes)
	219	return (MRFROM2SHORT(DOR_NODROPOP, 0));
	220	else
	221	uOp = DO_MOVE;
	222	break;
	223
	224	case DO_COPY:
	225	case DO_MOVE:
	226	uOp = m_pDragInfo->usOperation;
	227	break;
	228	}
	229	uIndicator = DOR_DROP;
	230	ulItems = (ULONG)::DrgQueryDragitemCount(m_pDragInfo);
	231	for (i = 0; i < ulItems; i++)
	232	{
	233	m_pDragItem = ::DrgQueryDragitemPtr(m_pDragInfo, i);
	234	if (((m_pDragItem->fsSupportedOps & DO_COPYABLE) &&
	235	(uOp == (USHORT)DO_COPY)) \|\|
	236	((m_pDragItem->fsSupportedOps & DO_MOVEABLE) &&
	237	(uOp == (USHORT)DO_COPY)))
	238	{
	239	if (::DrgVerifyRMF(m_pDragItem, "DRM_OS2FILE", "DRF_UNKNOWN"))
	240	uIndicator = (USHORT)DOR_DROP;
	241	else
	242	uIndicator = (USHORT)DOR_NEVERDROP;
	243	}
	244	}
	245
	246	//
	247	// First ask the drop target if it wants data
	248	//
	249	if (m_pTarget->OnDrop( m_pDragInfo->xDrop
	250	,m_pDragInfo->yDrop
	251	))
	252	{
	253	wxDragResult eRc;
	254
	255	//
	256	// And now it has the data
	257	//
	258	eRc = m_pTarget->OnData( m_pDragInfo->xDrop
	259	,m_pDragInfo->yDrop
	260	,eRc
	261	);
	262	}
	263	//else: OnDrop() returned FALSE, no need to copy data
	264
	265	//
	266	// Release the held object
	267	//
	268	Free();
	269	return (MRFROM2SHORT(uIndicator, uOp));
	270	} // end of CIDropTarget::Drop
	271
	272	// ----------------------------------------------------------------------------
	273	// wxDropTarget
	274	// ----------------------------------------------------------------------------
	275
	276	wxDropTarget::wxDropTarget (
	277	wxDataObject* pDataObject
	278	)
	279	{
	280	m_dataObject = pDataObject;
	281	m_pDropTarget = new CIDropTarget(this);
	282	} // end of wxDropTarget::wxDropTarget
	283
	284	wxDropTarget::~wxDropTarget()
	285	{
	286	Release();
	287	} // end of wxDropTarget::~wxDropTarget
	288
	289	bool wxDropTarget::GetData ()
	290	{
	291	wxDataFormat vFormat = GetSupportedFormat(m_pDropTarget->GetDataSource());
	292
	293	if (vFormat == wxDF_INVALID)
	294	{
	295	return FALSE;
	296	}
	297	//
	298	// Under OS/2 we already have the data via the attached DRAGITEM's
	299	//
	300	return TRUE;
	301	} // end of wxDropTarget::GetData
	302
	303	wxDataFormat wxDropTarget::GetSupportedFormat (
	304	PDRAGINFO pDataSource
	305	) const
	306	{
	307	PDRAGITEM pDragItem;
	308	wxDataFormat vFormat;
	309	wxDataFormat* pFormats;
	310	ULONG ulFormats = m_dataObject->GetFormatCount(wxDataObject::Set);
	311	ULONG ulItems = (ULONG)::DrgQueryDragitemCount(pDataSource);
	312	ULONG i;
	313	ULONG n;
	314	wxString sMechanism;
	315	wxString sFormat;
	316	bool bValid = FALSE;
	317
	318	pFormats = ulFormats == 1 ? &vFormat : new wxDataFormat[ulFormats];
	319	m_dataObject->GetAllFormats( pFormats
	320	,wxDataObject::Set
	321	);
	322
	323	for (n = 0; n < ulFormats; n++)
	324	{
	325	switch(pFormats[n].GetType())
	326	{
	327	case wxDF_TEXT:
	328	case wxDF_FILENAME:
	329	case wxDF_HTML:
	330	sMechanism = "DRM_OS2FILE";
	331	sFormat = "DRF_TEXT";
	332	break;
	333
	334	case wxDF_OEMTEXT:
	335	sMechanism = "DRM_OS2FILE";
	336	sFormat = "DRF_OEMTEXT";
	337	break;
	338
	339	case wxDF_BITMAP:
	340	sMechanism = "DRM_OS2FILE";
	341	sFormat = "DRF_BITMAP";
	342	break;
	343
	344	case wxDF_METAFILE:
	345	case wxDF_ENHMETAFILE:
	346	sMechanism = "DRM_OS2FILE";
	347	sFormat = "DRF_METAFILE";
	348	break;
	349
	350	case wxDF_TIFF:
	351	sMechanism = "DRM_OS2FILE";
	352	sFormat = "DRF_TIFF";
	353	break;
	354
	355	case wxDF_SYLK:
	356	sMechanism = "DRM_OS2FILE";
	357	sFormat = "DRF_SYLK";
	358	break;
	359
	360	case wxDF_DIF:
	361	sMechanism = "DRM_OS2FILE";
	362	sFormat = "DRF_DIF";
	363	break;
	364
	365	case wxDF_DIB:
	366	sMechanism = "DRM_OS2FILE";
	367	sFormat = "DRF_DIB";
	368	break;
	369
	370	case wxDF_PALETTE:
	371	case wxDF_PENDATA:
	372	case wxDF_RIFF:
	373	case wxDF_WAVE:
	374	case wxDF_UNICODETEXT:
	375	case wxDF_LOCALE:
	376	sMechanism = "DRM_OS2FILE";
	377	sFormat = "DRF_UNKNOWN";
	378	break;
	379
	380	case wxDF_PRIVATE:
	381	sMechanism = "DRM_OBJECT";
	382	sFormat = "DRF_UNKNOWN";
	383	break;
	384	}
	385	for (i = 0; i < ulItems; i++)
	386	{
	387	pDragItem = ::DrgQueryDragitemPtr(pDataSource, i);
	388	if (::DrgVerifyRMF(pDragItem, sMechanism.c_str(), sFormat.c_str()))
	389	{
	390	bValid = TRUE;
	391	break;
	392	}
	393	}
	394	if (bValid)
	395	{
	396	vFormat = pFormats[n];
	397	break;
	398	}
	399	}
	400	if (pFormats != &vFormat)
	401	{
	402	//
	403	// Free memory if we allocated it
	404	//
	405	delete [] pFormats;
	406	}
	407	return (n < ulFormats ? vFormat : wxFormatInvalid);
	408	} // end of wxDropTarget::GetSupportedFormat
	409
	410	bool wxDropTarget::IsAcceptedData (
	411	PDRAGINFO pDataSource
	412	) const
	413	{
	414	return (GetSupportedFormat(pDataSource) != wxDF_INVALID);
	415	} // end of wxDropTarget::IsAcceptedData
	416
	417	void wxDropTarget::Release ()
	418	{
	419	m_pDropTarget->Free();
	420	} // end of wxDropTarget::Release
	421
	422
	423	wxDragResult wxDropTarget::OnData (
	424	wxCoord WXUNUSED(vX)
	425	, wxCoord WXUNUSED(y)
	426	, wxDragResult WXUNUSED(vResult)
	427	)
	428	{
	429	return (wxDragResult)0;
	430	} // end of wxDropTarget::OnData
	431
	432	bool wxDropTarget::OnDrop (
	433	wxCoord WXUNUSED(x)
	434	, wxCoord WXUNUSED(y)
	435	)
	436	{
	437	return TRUE;
	438	} // end of wxDropTarget::OnDrop
	439
	440	//-------------------------------------------------------------------------
	441	// wxDropSource
	442	//-------------------------------------------------------------------------
	443
	444	wxDropSource::wxDropSource (
	445	wxWindow* pWin
	446	)
	447	{
	448	Init();
	449	} // end of wxDropSource::wxDropSource
	450
	451	wxDropSource::wxDropSource (
	452	wxDataObject& rData
	453	, wxWindow* pWin
	454	)
	455	{
	456	Init();
	457	SetData(rData);
	458	} // end of wxDropSource::wxDropSource
	459
	460	wxDropSource::~wxDropSource ()
	461	{
	462	::DrgFreeDraginfo(m_pDragInfo);
	463	} // end of wxDropSource::~wxDropSource
	464
	465	wxDragResult wxDropSource::DoDragDrop (
	466	int WXUNUSED(flags)
	467	)
	468	{
	469	//
	470	// Need to specify drag items in derived classes that know their data types
	471	// before calling DoDragDrop
	472	//
	473	if (::DrgDrag( m_pWindow->GetHWND()
	474	,m_pDragInfo
	475	,&m_vDragImage
	476	,m_ulItems
	477	,VK_BUTTON2
	478	,NULL
	479	) != NULLHANDLE)
	480	{
	481	switch(m_pDragInfo->usOperation)
	482	{
	483	case DO_COPY:
	484	return wxDragCopy;
	485
	486	case DO_MOVE:
	487	return wxDragCopy;
	488
	489	case DO_LINK:
	490	return wxDragCopy;
	491
	492	default:
	493	return wxDragNone;
	494	}
	495	}
	496	return wxDragError;
	497	} // end of wxDropSource::DoDragDrop
	498
	499	bool wxDropSource::GiveFeedback (
	500	wxDragResult eEffect
	501	)
	502	{
	503	const wxCursor& rCursor = GetCursor(eEffect);
	504
	505	if (rCursor.Ok())
	506	{
	507	::WinSetPointer(HWND_DESKTOP, (HPOINTER)rCursor.GetHCURSOR());
	508	m_vDragImage.hImage = (LHANDLE)rCursor.GetHCURSOR();
	509	switch(eEffect)
	510	{
	511	case wxDragCopy:
	512	m_pDragInfo->usOperation = DO_COPY;
	513	break;
	514
	515	case wxDragMove:
	516	m_pDragInfo->usOperation = DO_MOVE;
	517	break;
	518
	519	case wxDragLink:
	520	m_pDragInfo->usOperation = DO_LINK;
	521	break;
	522
	523	case wxDragNone:
	524	case wxDragCancel:
	525	case wxDragError:
	526	break;
	527	}
	528	return TRUE;
	529	}
	530	else
	531	{
	532	return FALSE;
	533	}
	534	} // end of GuiAdvDnd_CDropSource::GiveFeedback
	535
	536	void wxDropSource::Init ()
	537	{
	538	m_pDragInfo = ::DrgAllocDraginfo(m_ulItems);
	539
	540	//
	541	// Set a default drag image struct with what we know so far
	542	//
	543	m_vDragImage.cb = sizeof(DRAGIMAGE);
	544	m_vDragImage.cptl = 0; // non-zero if fl is DRG_POLYGON
	545	m_vDragImage.hImage = 0; // Set in GiveFeedback
	546	m_vDragImage.sizlStretch.cx = 20L;
	547	m_vDragImage.sizlStretch.cy = 20L;
	548	m_vDragImage.fl = DRG_ICON \| DRG_STRETCH;
	549	m_vDragImage.cxOffset = 0;
	550	m_vDragImage.cyOffset = 0;
	551
	552	HSTR hStrType = ::DrgAddStrHandle(DRT_UNKNOWN);
	553	HSTR hStrRMF;
	554	HSTR hStrContainer;
	555	char zFormats[128];
	556	char zContainer[128];
	557	USHORT uSize = GetDataObject()->GetDataSize(GetDataObject()->GetPreferredFormat()) + 1;
	558	char* pzBuffer = new char[uSize];
	559
	560	memset(pzBuffer, '\0', GetDataObject()->GetDataSize(GetDataObject()->GetPreferredFormat()));
	561	pzBuffer[GetDataObject()->GetDataSize(GetDataObject()->GetPreferredFormat())] = '\0';
	562	GetDataObject()->GetDataHere( GetDataObject()->GetPreferredFormat()
	563	,(void*)pzBuffer
	564	);
	565
	566	strcpy(zFormats, "<DRM_OS2FILE, DRF_UNKNOWN>");
	567	strcpy(zContainer, GetDataObject()->GetPreferredFormat().GetId().c_str());
	568
	569	hStrRMF = ::DrgAddStrHandle(zFormats);
	570	hStrContainer = ::DrgAddStrHandle(zContainer);
	571
	572	m_pDragItem = new DRAGITEM[m_ulItems];
	573	for (ULONG i = 0; i < m_ulItems; i++)
	574	{
	575	m_pDragItem[i].hwndItem = m_pWindow->GetHWND();
	576	m_pDragItem[i].hstrType = hStrType;
	577	m_pDragItem[i].hstrRMF = hStrRMF;
	578	m_pDragItem[i].hstrContainerName = hStrContainer;
	579	m_pDragItem[i].fsControl = 0;
	580	m_pDragItem[i].fsSupportedOps = DO_COPYABLE \| DO_MOVEABLE \| DO_LINKABLE;
	581	m_pDragItem[i].hstrSourceName = ::DrgAddStrHandle(pzBuffer);
	582	m_pDragItem[i].hstrTargetName = m_pDragItem[i].hstrSourceName;
	583	m_pDragItem[i].ulItemID = i;
	584	::DrgSetDragitem( m_pDragInfo
	585	,&m_pDragItem[i]
	586	,sizeof(DRAGITEM)
	587	,0
	588	);
	589	}
	590	delete [] pzBuffer;
	591	delete [] m_pDragItem;
	592	} // end of wxDropSource::Init
	593
	594	#endif //wxUSE_DRAG_AND_DROP