src/osx/carbon/dnd.cpp

///////////////////////////////////////////////////////////////////////////////
// Name:        src/osx/carbon/dnd.cpp
// Purpose:     wxDropTarget, wxDropSource implementations
// Author:      Stefan Csomor
// Modified by:
// Created:     1998-01-01
// RCS-ID:      $Id$
// Copyright:   (c) 1998 Stefan Csomor
// Licence:     wxWindows licence
///////////////////////////////////////////////////////////////////////////////

#include "wx/wxprec.h"

#if wxUSE_DRAG_AND_DROP

#include "wx/dnd.h"

#ifndef WX_PRECOMP
    #include "wx/app.h"
    #include "wx/toplevel.h"
    #include "wx/gdicmn.h"
#endif // WX_PRECOMP

#include "wx/osx/private.h"

// ----------------------------------------------------------------------------
// globals
// ----------------------------------------------------------------------------

typedef struct
{
    wxWindow *m_currentTargetWindow;
    wxDropTarget *m_currentTarget;
    wxDropSource *m_currentSource;
    wxDragResult m_result;
    int m_flags;
} MacTrackingGlobals;

MacTrackingGlobals gTrackingGlobals;

void wxMacEnsureTrackingHandlersInstalled();

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

wxDropTarget::wxDropTarget( wxDataObject *data )
            : wxDropTargetBase( data )
{
    wxMacEnsureTrackingHandlersInstalled();
}

wxDragResult wxDropTarget::OnDragOver(
    wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
    wxDragResult def )
{
    return CurrentDragHasSupportedFormat() ? def : wxDragNone;
}

wxDataFormat wxDropTarget::GetMatchingPair()
{
    wxFAIL_MSG("wxDropTarget::GetMatchingPair() not implemented in src/osx/carbon/dnd.cpp");
    return wxDF_INVALID;
}

bool wxDropTarget::OnDrop( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y) )
{
    if (m_dataObject == NULL)
        return false;

    return CurrentDragHasSupportedFormat();
}

wxDragResult wxDropTarget::OnData(
    wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
    wxDragResult def )
{
    if (m_dataObject == NULL)
        return wxDragNone;

    if (!CurrentDragHasSupportedFormat())
        return wxDragNone;

    return GetData() ? def : wxDragNone;
}

bool wxDropTarget::CurrentDragHasSupportedFormat()
{
    bool supported = false;
    if (m_dataObject == NULL)
        return false;

    if ( gTrackingGlobals.m_currentSource != NULL )
    {
        wxDataObject* data = gTrackingGlobals.m_currentSource->GetDataObject();

        if ( data )
        {
            size_t formatcount = data->GetFormatCount();
            wxDataFormat *array = new wxDataFormat[formatcount];
            data->GetAllFormats( array );
            for (size_t i = 0; !supported && i < formatcount; i++)
            {
                wxDataFormat format = array[i];
                if ( m_dataObject->IsSupported( format ) )
                {
                    supported = true;
                    break;
                }
            }

            delete [] array;
        }
    }

    if ( !supported )
    {
        supported = m_dataObject->HasDataInPasteboard( m_currentDragPasteboard );
    }

    return supported;
}

bool wxDropTarget::GetData()
{
    if (m_dataObject == NULL)
        return false;

    if ( !CurrentDragHasSupportedFormat() )
        return false;

    bool transferred = false;
    if ( gTrackingGlobals.m_currentSource != NULL )
    {
        wxDataObject* data = gTrackingGlobals.m_currentSource->GetDataObject();

        if (data != NULL)
        {
            size_t formatcount = data->GetFormatCount();
            wxDataFormat *array = new wxDataFormat[formatcount];
            data->GetAllFormats( array );
            for (size_t i = 0; !transferred && i < formatcount; i++)
            {
                wxDataFormat format = array[i];
                if ( m_dataObject->IsSupported( format ) )
                {
                    int size = data->GetDataSize( format );
                    transferred = true;

                    if (size == 0)
                    {
                        m_dataObject->SetData( format, 0, 0 );
                    }
                    else
                    {
                        char *d = new char[size];
                        data->GetDataHere( format, (void*)d );
                        m_dataObject->SetData( format, size, d );
                        delete [] d;
                    }
                }
            }

            delete [] array;
        }
    }

    if ( !transferred )
    {
        transferred = m_dataObject->GetFromPasteboard( m_currentDragPasteboard );
    }

    return transferred;
}

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

//-----------------------------------------------------------------------------
// drag request

wxDropSource::wxDropSource(wxWindow *win,
                           const wxCursor &cursorCopy,
                           const wxCursor &cursorMove,
                           const wxCursor &cursorStop)
            : wxDropSourceBase(cursorCopy, cursorMove, cursorStop)
{
    wxMacEnsureTrackingHandlersInstalled();

    m_window = win;
}

wxDropSource::wxDropSource(wxDataObject& data,
                           wxWindow *win,
                           const wxCursor &cursorCopy,
                           const wxCursor &cursorMove,
                           const wxCursor &cursorStop)
            : wxDropSourceBase(cursorCopy, cursorMove, cursorStop)
{
    wxMacEnsureTrackingHandlersInstalled();

    SetData( data );
    m_window = win;
}

wxDropSource::~wxDropSource()
{
}

OSStatus wxMacPromiseKeeper(PasteboardRef WXUNUSED(inPasteboard),
                            PasteboardItemID WXUNUSED(inItem),
                            CFStringRef WXUNUSED(inFlavorType),
                            void * WXUNUSED(inContext))
{
    OSStatus  err = noErr;

    // we might add promises here later, inContext is the wxDropSource*

    return err;
}

wxDragResult wxDropSource::DoDragDrop(int flags)
{
    wxASSERT_MSG( m_data, wxT("Drop source: no data") );

    if ((m_data == NULL) || (m_data->GetFormatCount() == 0))
        return (wxDragResult)wxDragNone;

#if wxOSX_USE_CARBON
    DragReference theDrag;
    RgnHandle dragRegion;
    OSStatus err = noErr;
    PasteboardRef   pasteboard;

    // add data to drag

    err = PasteboardCreate( kPasteboardUniqueName, &pasteboard );
    if ( err != noErr )
        return wxDragNone;

    // we add a dummy promise keeper because of strange messages when linking against carbon debug
    err = PasteboardSetPromiseKeeper( pasteboard, wxMacPromiseKeeper, this );
    if ( err != noErr )
    {
        CFRelease( pasteboard );
        return wxDragNone;
    }

    err = PasteboardClear( pasteboard );
    if ( err != noErr )
    {
        CFRelease( pasteboard );
        return wxDragNone;
    }
    PasteboardSynchronize( pasteboard );

    m_data->AddToPasteboard( pasteboard, 1 );

    if (NewDragWithPasteboard( pasteboard , &theDrag) != noErr)
    {
        CFRelease( pasteboard );
        return wxDragNone;
    }

    dragRegion = NewRgn();
    RgnHandle tempRgn = NewRgn();

    EventRecord rec;
    ConvertEventRefToEventRecord(  (EventRef) wxTheApp->MacGetCurrentEvent(), &rec );

    const short dragRegionOuterBoundary = 10;
    const short dragRegionInnerBoundary = 9;

    SetRectRgn(
        dragRegion,
        rec.where.h - dragRegionOuterBoundary,
        rec.where.v  - dragRegionOuterBoundary,
        rec.where.h + dragRegionOuterBoundary,
        rec.where.v + dragRegionOuterBoundary );

    SetRectRgn(
        tempRgn,
        rec.where.h - dragRegionInnerBoundary,
        rec.where.v - dragRegionInnerBoundary,
        rec.where.h + dragRegionInnerBoundary,
        rec.where.v + dragRegionInnerBoundary );

    DiffRgn( dragRegion, tempRgn, dragRegion );
    DisposeRgn( tempRgn );

    // TODO: work with promises in order to return data
    // only when drag was successfully completed

    gTrackingGlobals.m_currentSource = this;
    gTrackingGlobals.m_result = wxDragNone;
    gTrackingGlobals.m_flags = flags;

    err = TrackDrag( theDrag, &rec, dragRegion );

    DisposeRgn( dragRegion );
    DisposeDrag( theDrag );
    CFRelease( pasteboard );
    gTrackingGlobals.m_currentSource = NULL;
#else
    wxUnusedVar(flags);
#endif

    return gTrackingGlobals.m_result;
}

bool wxDropSource::MacInstallDefaultCursor(wxDragResult effect)
{
    const wxCursor& cursor = GetCursor(effect);
    bool result = cursor.Ok();

    if ( result )
        cursor.MacInstall();

    return result;
}

bool gTrackingGlobalsInstalled = false;

// passing the globals via refcon is not needed by the CFM and later architectures anymore
// but I'll leave it in there, just in case...

#if wxOSX_USE_CARBON
pascal OSErr wxMacWindowDragTrackingHandler(
    DragTrackingMessage theMessage, WindowPtr theWindow,
    void *handlerRefCon, DragReference theDrag );
pascal OSErr wxMacWindowDragReceiveHandler(
    WindowPtr theWindow, void *handlerRefCon,
    DragReference theDrag );
#endif

void wxMacEnsureTrackingHandlersInstalled()
{
#if wxOSX_USE_CARBON
    if ( !gTrackingGlobalsInstalled )
    {
        OSStatus err;

        err = InstallTrackingHandler( NewDragTrackingHandlerUPP(wxMacWindowDragTrackingHandler), 0L, &gTrackingGlobals );
        verify_noerr( err );

        err = InstallReceiveHandler( NewDragReceiveHandlerUPP(wxMacWindowDragReceiveHandler), 0L, &gTrackingGlobals );
        verify_noerr( err );

        gTrackingGlobalsInstalled = true;
    }
#endif
}

#if wxOSX_USE_CARBON
pascal OSErr wxMacWindowDragTrackingHandler(
    DragTrackingMessage theMessage, WindowPtr theWindow,
    void *handlerRefCon, DragReference theDrag )
{
    MacTrackingGlobals* trackingGlobals = (MacTrackingGlobals*) handlerRefCon;

    Point mouse, localMouse;
    DragAttributes attributes;

    GetDragAttributes( theDrag, &attributes );
    PasteboardRef   pasteboard = 0;
    GetDragPasteboard( theDrag, &pasteboard );
    wxNonOwnedWindow* toplevel = wxNonOwnedWindow::GetFromWXWindow( (WXWindow) theWindow );

    bool optionDown = GetCurrentKeyModifiers() & optionKey;
    wxDragResult result = optionDown ? wxDragCopy : wxDragMove;

    switch (theMessage)
    {
        case kDragTrackingEnterHandler:
        case kDragTrackingLeaveHandler:
            break;

        case kDragTrackingEnterWindow:
            if (trackingGlobals != NULL)
            {
                trackingGlobals->m_currentTargetWindow = NULL;
                trackingGlobals->m_currentTarget = NULL;
            }
            break;

        case kDragTrackingInWindow:
            if (trackingGlobals == NULL)
                break;
            if (toplevel == NULL)
                break;

            GetDragMouse( theDrag, &mouse, 0L );
            {
                int x = mouse.h ;
                int y = mouse.v ;
                toplevel->GetNonOwnedPeer()->ScreenToWindow( &x, &y );
                localMouse.h = x;
                localMouse.v = y;

                {
                    wxWindow *win = NULL;
                    ControlPartCode controlPart;
                    ControlRef control = FindControlUnderMouse( localMouse, theWindow, &controlPart );
                    if ( control )
                        win = wxFindWindowFromWXWidget( (WXWidget) control );
                    else
                        win = toplevel;

                    int localx, localy;
                    localx = localMouse.h;
                    localy = localMouse.v;

                    if ( win )
                        win->MacRootWindowToWindow( &localx, &localy );
                    if ( win != trackingGlobals->m_currentTargetWindow )
                    {
                        if ( trackingGlobals->m_currentTargetWindow )
                        {
                            // this window is left
                            if ( trackingGlobals->m_currentTarget )
                            {
#ifndef __LP64__
                                HideDragHilite( theDrag );
#endif
                                trackingGlobals->m_currentTarget->SetCurrentDragPasteboard( pasteboard );
                                trackingGlobals->m_currentTarget->OnLeave();
                                trackingGlobals->m_currentTarget = NULL;
                                trackingGlobals->m_currentTargetWindow = NULL;
                            }
                        }

                        if ( win )
                        {
                            // this window is entered
                            trackingGlobals->m_currentTargetWindow = win;
                            trackingGlobals->m_currentTarget = win->GetDropTarget();
                            {
                                if ( trackingGlobals->m_currentTarget )
                                {
                                    trackingGlobals->m_currentTarget->SetCurrentDragPasteboard( pasteboard );
                                    result = trackingGlobals->m_currentTarget->OnEnter( localx, localy, result );
                                }

                                if ( result != wxDragNone )
                                {
                                    int x, y;

                                    x = y = 0;
                                    win->MacWindowToRootWindow( &x, &y );
                                    RgnHandle hiliteRgn = NewRgn();
                                    Rect r = { y, x, y + win->GetSize().y, x + win->GetSize().x };
                                    RectRgn( hiliteRgn, &r );
#ifndef __LP64__
                                    ShowDragHilite( theDrag, hiliteRgn, true );
#endif
                                    DisposeRgn( hiliteRgn );
                                }
                            }
                        }
                    }
                    else
                    {
                        if ( trackingGlobals->m_currentTarget )
                        {
                            trackingGlobals->m_currentTarget->SetCurrentDragPasteboard( pasteboard );
                            result = trackingGlobals->m_currentTarget->OnDragOver( localx, localy, result );
                        }
                    }

                    // set cursor for OnEnter and OnDragOver
                    if ( trackingGlobals->m_currentSource && !trackingGlobals->m_currentSource->GiveFeedback( result ) )
                    {
                        if ( !trackingGlobals->m_currentSource->MacInstallDefaultCursor( result ) )
                        {
                            wxStockCursor cursorID = wxCURSOR_NONE;

                            switch (result)
                            {
                                case wxDragCopy:
                                    cursorID = wxCURSOR_COPY_ARROW;
                                    break;

                                case wxDragMove:
                                    cursorID = wxCURSOR_ARROW;
                                    break;

                                case wxDragNone:
                                    cursorID = wxCURSOR_NO_ENTRY;
                                    break;

                                case wxDragError:
                                case wxDragLink:
                                case wxDragCancel:
                                default:
                                    // put these here to make gcc happy
                                    ;
                            }

                            if (cursorID != wxCURSOR_NONE)
                            {
                                wxCursor cursor( cursorID );
                                cursor.MacInstall();
                            }
                        }
                    }
                }
            }
            break;

        case kDragTrackingLeaveWindow:
            if (trackingGlobals == NULL)
                break;

            if (trackingGlobals->m_currentTarget)
            {
                trackingGlobals->m_currentTarget->SetCurrentDragPasteboard( pasteboard );
                trackingGlobals->m_currentTarget->OnLeave();
#ifndef __LP64__
                HideDragHilite( theDrag );
#endif
                trackingGlobals->m_currentTarget = NULL;
            }
            trackingGlobals->m_currentTargetWindow = NULL;
            break;

        default:
            break;
    }

    return noErr;
}

pascal OSErr wxMacWindowDragReceiveHandler(
    WindowPtr theWindow,
    void *handlerRefCon,
    DragReference theDrag)
{
    MacTrackingGlobals* trackingGlobals = (MacTrackingGlobals*)handlerRefCon;
    if ( trackingGlobals->m_currentTarget )
    {
        Point mouse, localMouse;
        int localx, localy;

        PasteboardRef   pasteboard = 0;
        GetDragPasteboard( theDrag, &pasteboard );
        trackingGlobals->m_currentTarget->SetCurrentDragPasteboard( pasteboard );
        GetDragMouse( theDrag, &mouse, 0L );
        localMouse = mouse;
        localx = localMouse.h;
        localy = localMouse.v;
        wxNonOwnedWindow* tlw = wxNonOwnedWindow::GetFromWXWindow((WXWindow) theWindow);
        if ( tlw )
            tlw->GetNonOwnedPeer()->ScreenToWindow( &localx, &localy );

        // TODO : should we use client coordinates?
        if ( trackingGlobals->m_currentTargetWindow )
            trackingGlobals->m_currentTargetWindow->MacRootWindowToWindow( &localx, &localy );
        if ( trackingGlobals->m_currentTarget->OnDrop( localx, localy ) )
        {
            // the option key indicates copy in Mac UI, if it's not pressed do
            // move by default if it's allowed at all
            wxDragResult
                result = !(trackingGlobals->m_flags & wxDrag_AllowMove) ||
                            (GetCurrentKeyModifiers() & optionKey)
                            ? wxDragCopy
                            : wxDragMove;
            trackingGlobals->m_result =
                trackingGlobals->m_currentTarget->OnData( localx, localy, result );
        }
    }

    return noErr;
}
#endif

#endif // wxUSE_DRAG_AND_DROP
Commit	Line	Data
	1	///////////////////////////////////////////////////////////////////////////////
	2	// Name: src/osx/carbon/dnd.cpp
	3	// Purpose: wxDropTarget, wxDropSource implementations
	4	// Author: Stefan Csomor
	5	// Modified by:
	6	// Created: 1998-01-01
	7	// RCS-ID: $Id$
	8	// Copyright: (c) 1998 Stefan Csomor
	9	// Licence: wxWindows licence
	10	///////////////////////////////////////////////////////////////////////////////
	11
	12	#include "wx/wxprec.h"
	13
	14	#if wxUSE_DRAG_AND_DROP
	15
	16	#include "wx/dnd.h"
	17
	18	#ifndef WX_PRECOMP
	19	#include "wx/app.h"
	20	#include "wx/toplevel.h"
	21	#include "wx/gdicmn.h"
	22	#endif // WX_PRECOMP
	23
	24	#include "wx/osx/private.h"
	25
	26	// ----------------------------------------------------------------------------
	27	// globals
	28	// ----------------------------------------------------------------------------
	29
	30	typedef struct
	31	{
	32	wxWindow *m_currentTargetWindow;
	33	wxDropTarget *m_currentTarget;
	34	wxDropSource *m_currentSource;
	35	wxDragResult m_result;
	36	int m_flags;
	37	} MacTrackingGlobals;
	38
	39	MacTrackingGlobals gTrackingGlobals;
	40
	41	void wxMacEnsureTrackingHandlersInstalled();
	42
	43	//----------------------------------------------------------------------------
	44	// wxDropTarget
	45	//----------------------------------------------------------------------------
	46
	47	wxDropTarget::wxDropTarget( wxDataObject *data )
	48	: wxDropTargetBase( data )
	49	{
	50	wxMacEnsureTrackingHandlersInstalled();
	51	}
	52
	53	wxDragResult wxDropTarget::OnDragOver(
	54	wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
	55	wxDragResult def )
	56	{
	57	return CurrentDragHasSupportedFormat() ? def : wxDragNone;
	58	}
	59
	60	wxDataFormat wxDropTarget::GetMatchingPair()
	61	{
	62	wxFAIL_MSG("wxDropTarget::GetMatchingPair() not implemented in src/osx/carbon/dnd.cpp");
	63	return wxDF_INVALID;
	64	}
	65
	66	bool wxDropTarget::OnDrop( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y) )
	67	{
	68	if (m_dataObject == NULL)
	69	return false;
	70
	71	return CurrentDragHasSupportedFormat();
	72	}
	73
	74	wxDragResult wxDropTarget::OnData(
	75	wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
	76	wxDragResult def )
	77	{
	78	if (m_dataObject == NULL)
	79	return wxDragNone;
	80
	81	if (!CurrentDragHasSupportedFormat())
	82	return wxDragNone;
	83
	84	return GetData() ? def : wxDragNone;
	85	}
	86
	87	bool wxDropTarget::CurrentDragHasSupportedFormat()
	88	{
	89	bool supported = false;
	90	if (m_dataObject == NULL)
	91	return false;
	92
	93	if ( gTrackingGlobals.m_currentSource != NULL )
	94	{
	95	wxDataObject* data = gTrackingGlobals.m_currentSource->GetDataObject();
	96
	97	if ( data )
	98	{
	99	size_t formatcount = data->GetFormatCount();
	100	wxDataFormat *array = new wxDataFormat[formatcount];
	101	data->GetAllFormats( array );
	102	for (size_t i = 0; !supported && i < formatcount; i++)
	103	{
	104	wxDataFormat format = array[i];
	105	if ( m_dataObject->IsSupported( format ) )
	106	{
	107	supported = true;
	108	break;
	109	}
	110	}
	111
	112	delete [] array;
	113	}
	114	}
	115
	116	if ( !supported )
	117	{
	118	supported = m_dataObject->HasDataInPasteboard( m_currentDragPasteboard );
	119	}
	120
	121	return supported;
	122	}
	123
	124	bool wxDropTarget::GetData()
	125	{
	126	if (m_dataObject == NULL)
	127	return false;
	128
	129	if ( !CurrentDragHasSupportedFormat() )
	130	return false;
	131
	132	bool transferred = false;
	133	if ( gTrackingGlobals.m_currentSource != NULL )
	134	{
	135	wxDataObject* data = gTrackingGlobals.m_currentSource->GetDataObject();
	136
	137	if (data != NULL)
	138	{
	139	size_t formatcount = data->GetFormatCount();
	140	wxDataFormat *array = new wxDataFormat[formatcount];
	141	data->GetAllFormats( array );
	142	for (size_t i = 0; !transferred && i < formatcount; i++)
	143	{
	144	wxDataFormat format = array[i];
	145	if ( m_dataObject->IsSupported( format ) )
	146	{
	147	int size = data->GetDataSize( format );
	148	transferred = true;
	149
	150	if (size == 0)
	151	{
	152	m_dataObject->SetData( format, 0, 0 );
	153	}
	154	else
	155	{
	156	char *d = new char[size];
	157	data->GetDataHere( format, (void*)d );
	158	m_dataObject->SetData( format, size, d );
	159	delete [] d;
	160	}
	161	}
	162	}
	163
	164	delete [] array;
	165	}
	166	}
	167
	168	if ( !transferred )
	169	{
	170	transferred = m_dataObject->GetFromPasteboard( m_currentDragPasteboard );
	171	}
	172
	173	return transferred;
	174	}
	175
	176	//-------------------------------------------------------------------------
	177	// wxDropSource
	178	//-------------------------------------------------------------------------
	179
	180	//-----------------------------------------------------------------------------
	181	// drag request
	182
	183	wxDropSource::wxDropSource(wxWindow *win,
	184	const wxCursor &cursorCopy,
	185	const wxCursor &cursorMove,
	186	const wxCursor &cursorStop)
	187	: wxDropSourceBase(cursorCopy, cursorMove, cursorStop)
	188	{
	189	wxMacEnsureTrackingHandlersInstalled();
	190
	191	m_window = win;
	192	}
	193
	194	wxDropSource::wxDropSource(wxDataObject& data,
	195	wxWindow *win,
	196	const wxCursor &cursorCopy,
	197	const wxCursor &cursorMove,
	198	const wxCursor &cursorStop)
	199	: wxDropSourceBase(cursorCopy, cursorMove, cursorStop)
	200	{
	201	wxMacEnsureTrackingHandlersInstalled();
	202
	203	SetData( data );
	204	m_window = win;
	205	}
	206
	207	wxDropSource::~wxDropSource()
	208	{
	209	}
	210
	211	OSStatus wxMacPromiseKeeper(PasteboardRef WXUNUSED(inPasteboard),
	212	PasteboardItemID WXUNUSED(inItem),
	213	CFStringRef WXUNUSED(inFlavorType),
	214	void * WXUNUSED(inContext))
	215	{
	216	OSStatus err = noErr;
	217
	218	// we might add promises here later, inContext is the wxDropSource*
	219
	220	return err;
	221	}
	222
	223	wxDragResult wxDropSource::DoDragDrop(int flags)
	224	{
	225	wxASSERT_MSG( m_data, wxT("Drop source: no data") );
	226
	227	if ((m_data == NULL) \|\| (m_data->GetFormatCount() == 0))
	228	return (wxDragResult)wxDragNone;
	229
	230	#if wxOSX_USE_CARBON
	231	DragReference theDrag;
	232	RgnHandle dragRegion;
	233	OSStatus err = noErr;
	234	PasteboardRef pasteboard;
	235
	236	// add data to drag
	237
	238	err = PasteboardCreate( kPasteboardUniqueName, &pasteboard );
	239	if ( err != noErr )
	240	return wxDragNone;
	241
	242	// we add a dummy promise keeper because of strange messages when linking against carbon debug
	243	err = PasteboardSetPromiseKeeper( pasteboard, wxMacPromiseKeeper, this );
	244	if ( err != noErr )
	245	{
	246	CFRelease( pasteboard );
	247	return wxDragNone;
	248	}
	249
	250	err = PasteboardClear( pasteboard );
	251	if ( err != noErr )
	252	{
	253	CFRelease( pasteboard );
	254	return wxDragNone;
	255	}
	256	PasteboardSynchronize( pasteboard );
	257
	258	m_data->AddToPasteboard( pasteboard, 1 );
	259
	260	if (NewDragWithPasteboard( pasteboard , &theDrag) != noErr)
	261	{
	262	CFRelease( pasteboard );
	263	return wxDragNone;
	264	}
	265
	266	dragRegion = NewRgn();
	267	RgnHandle tempRgn = NewRgn();
	268
	269	EventRecord rec;
	270	ConvertEventRefToEventRecord( (EventRef) wxTheApp->MacGetCurrentEvent(), &rec );
	271
	272	const short dragRegionOuterBoundary = 10;
	273	const short dragRegionInnerBoundary = 9;
	274
	275	SetRectRgn(
	276	dragRegion,
	277	rec.where.h - dragRegionOuterBoundary,
	278	rec.where.v - dragRegionOuterBoundary,
	279	rec.where.h + dragRegionOuterBoundary,
	280	rec.where.v + dragRegionOuterBoundary );
	281
	282	SetRectRgn(
	283	tempRgn,
	284	rec.where.h - dragRegionInnerBoundary,
	285	rec.where.v - dragRegionInnerBoundary,
	286	rec.where.h + dragRegionInnerBoundary,
	287	rec.where.v + dragRegionInnerBoundary );
	288
	289	DiffRgn( dragRegion, tempRgn, dragRegion );
	290	DisposeRgn( tempRgn );
	291
	292	// TODO: work with promises in order to return data
	293	// only when drag was successfully completed
	294
	295	gTrackingGlobals.m_currentSource = this;
	296	gTrackingGlobals.m_result = wxDragNone;
	297	gTrackingGlobals.m_flags = flags;
	298
	299	err = TrackDrag( theDrag, &rec, dragRegion );
	300
	301	DisposeRgn( dragRegion );
	302	DisposeDrag( theDrag );
	303	CFRelease( pasteboard );
	304	gTrackingGlobals.m_currentSource = NULL;
	305	#else
	306	wxUnusedVar(flags);
	307	#endif
	308
	309	return gTrackingGlobals.m_result;
	310	}
	311
	312	bool wxDropSource::MacInstallDefaultCursor(wxDragResult effect)
	313	{
	314	const wxCursor& cursor = GetCursor(effect);
	315	bool result = cursor.Ok();
	316
	317	if ( result )
	318	cursor.MacInstall();
	319
	320	return result;
	321	}
	322
	323	bool gTrackingGlobalsInstalled = false;
	324
	325	// passing the globals via refcon is not needed by the CFM and later architectures anymore
	326	// but I'll leave it in there, just in case...
	327
	328	#if wxOSX_USE_CARBON
	329	pascal OSErr wxMacWindowDragTrackingHandler(
	330	DragTrackingMessage theMessage, WindowPtr theWindow,
	331	void *handlerRefCon, DragReference theDrag );
	332	pascal OSErr wxMacWindowDragReceiveHandler(
	333	WindowPtr theWindow, void *handlerRefCon,
	334	DragReference theDrag );
	335	#endif
	336
	337	void wxMacEnsureTrackingHandlersInstalled()
	338	{
	339	#if wxOSX_USE_CARBON
	340	if ( !gTrackingGlobalsInstalled )
	341	{
	342	OSStatus err;
	343
	344	err = InstallTrackingHandler( NewDragTrackingHandlerUPP(wxMacWindowDragTrackingHandler), 0L, &gTrackingGlobals );
	345	verify_noerr( err );
	346
	347	err = InstallReceiveHandler( NewDragReceiveHandlerUPP(wxMacWindowDragReceiveHandler), 0L, &gTrackingGlobals );
	348	verify_noerr( err );
	349
	350	gTrackingGlobalsInstalled = true;
	351	}
	352	#endif
	353	}
	354
	355	#if wxOSX_USE_CARBON
	356	pascal OSErr wxMacWindowDragTrackingHandler(
	357	DragTrackingMessage theMessage, WindowPtr theWindow,
	358	void *handlerRefCon, DragReference theDrag )
	359	{
	360	MacTrackingGlobals* trackingGlobals = (MacTrackingGlobals*) handlerRefCon;
	361
	362	Point mouse, localMouse;
	363	DragAttributes attributes;
	364
	365	GetDragAttributes( theDrag, &attributes );
	366	PasteboardRef pasteboard = 0;
	367	GetDragPasteboard( theDrag, &pasteboard );
	368	wxNonOwnedWindow* toplevel = wxNonOwnedWindow::GetFromWXWindow( (WXWindow) theWindow );
	369
	370	bool optionDown = GetCurrentKeyModifiers() & optionKey;
	371	wxDragResult result = optionDown ? wxDragCopy : wxDragMove;
	372
	373	switch (theMessage)
	374	{
	375	case kDragTrackingEnterHandler:
	376	case kDragTrackingLeaveHandler:
	377	break;
	378
	379	case kDragTrackingEnterWindow:
	380	if (trackingGlobals != NULL)
	381	{
	382	trackingGlobals->m_currentTargetWindow = NULL;
	383	trackingGlobals->m_currentTarget = NULL;
	384	}
	385	break;
	386
	387	case kDragTrackingInWindow:
	388	if (trackingGlobals == NULL)
	389	break;
	390	if (toplevel == NULL)
	391	break;
	392
	393	GetDragMouse( theDrag, &mouse, 0L );
	394	{
	395	int x = mouse.h ;
	396	int y = mouse.v ;
	397	toplevel->GetNonOwnedPeer()->ScreenToWindow( &x, &y );
	398	localMouse.h = x;
	399	localMouse.v = y;
	400
	401	{
	402	wxWindow *win = NULL;
	403	ControlPartCode controlPart;
	404	ControlRef control = FindControlUnderMouse( localMouse, theWindow, &controlPart );
	405	if ( control )
	406	win = wxFindWindowFromWXWidget( (WXWidget) control );
	407	else
	408	win = toplevel;
	409
	410	int localx, localy;
	411	localx = localMouse.h;
	412	localy = localMouse.v;
	413
	414	if ( win )
	415	win->MacRootWindowToWindow( &localx, &localy );
	416	if ( win != trackingGlobals->m_currentTargetWindow )
	417	{
	418	if ( trackingGlobals->m_currentTargetWindow )
	419	{
	420	// this window is left
	421	if ( trackingGlobals->m_currentTarget )
	422	{
	423	#ifndef __LP64__
	424	HideDragHilite( theDrag );
	425	#endif
	426	trackingGlobals->m_currentTarget->SetCurrentDragPasteboard( pasteboard );
	427	trackingGlobals->m_currentTarget->OnLeave();
	428	trackingGlobals->m_currentTarget = NULL;
	429	trackingGlobals->m_currentTargetWindow = NULL;
	430	}
	431	}
	432
	433	if ( win )
	434	{
	435	// this window is entered
	436	trackingGlobals->m_currentTargetWindow = win;
	437	trackingGlobals->m_currentTarget = win->GetDropTarget();
	438	{
	439	if ( trackingGlobals->m_currentTarget )
	440	{
	441	trackingGlobals->m_currentTarget->SetCurrentDragPasteboard( pasteboard );
	442	result = trackingGlobals->m_currentTarget->OnEnter( localx, localy, result );
	443	}
	444
	445	if ( result != wxDragNone )
	446	{
	447	int x, y;
	448
	449	x = y = 0;
	450	win->MacWindowToRootWindow( &x, &y );
	451	RgnHandle hiliteRgn = NewRgn();
	452	Rect r = { y, x, y + win->GetSize().y, x + win->GetSize().x };
	453	RectRgn( hiliteRgn, &r );
	454	#ifndef __LP64__
	455	ShowDragHilite( theDrag, hiliteRgn, true );
	456	#endif
	457	DisposeRgn( hiliteRgn );
	458	}
	459	}
	460	}
	461	}
	462	else
	463	{
	464	if ( trackingGlobals->m_currentTarget )
	465	{
	466	trackingGlobals->m_currentTarget->SetCurrentDragPasteboard( pasteboard );
	467	result = trackingGlobals->m_currentTarget->OnDragOver( localx, localy, result );
	468	}
	469	}
	470
	471	// set cursor for OnEnter and OnDragOver
	472	if ( trackingGlobals->m_currentSource && !trackingGlobals->m_currentSource->GiveFeedback( result ) )
	473	{
	474	if ( !trackingGlobals->m_currentSource->MacInstallDefaultCursor( result ) )
	475	{
	476	wxStockCursor cursorID = wxCURSOR_NONE;
	477
	478	switch (result)
	479	{
	480	case wxDragCopy:
	481	cursorID = wxCURSOR_COPY_ARROW;
	482	break;
	483
	484	case wxDragMove:
	485	cursorID = wxCURSOR_ARROW;
	486	break;
	487
	488	case wxDragNone:
	489	cursorID = wxCURSOR_NO_ENTRY;
	490	break;
	491
	492	case wxDragError:
	493	case wxDragLink:
	494	case wxDragCancel:
	495	default:
	496	// put these here to make gcc happy
	497	;
	498	}
	499
	500	if (cursorID != wxCURSOR_NONE)
	501	{
	502	wxCursor cursor( cursorID );
	503	cursor.MacInstall();
	504	}
	505	}
	506	}
	507	}
	508	}
	509	break;
	510
	511	case kDragTrackingLeaveWindow:
	512	if (trackingGlobals == NULL)
	513	break;
	514
	515	if (trackingGlobals->m_currentTarget)
	516	{
	517	trackingGlobals->m_currentTarget->SetCurrentDragPasteboard( pasteboard );
	518	trackingGlobals->m_currentTarget->OnLeave();
	519	#ifndef __LP64__
	520	HideDragHilite( theDrag );
	521	#endif
	522	trackingGlobals->m_currentTarget = NULL;
	523	}
	524	trackingGlobals->m_currentTargetWindow = NULL;
	525	break;
	526
	527	default:
	528	break;
	529	}
	530
	531	return noErr;
	532	}
	533
	534	pascal OSErr wxMacWindowDragReceiveHandler(
	535	WindowPtr theWindow,
	536	void *handlerRefCon,
	537	DragReference theDrag)
	538	{
	539	MacTrackingGlobals* trackingGlobals = (MacTrackingGlobals*)handlerRefCon;
	540	if ( trackingGlobals->m_currentTarget )
	541	{
	542	Point mouse, localMouse;
	543	int localx, localy;
	544
	545	PasteboardRef pasteboard = 0;
	546	GetDragPasteboard( theDrag, &pasteboard );
	547	trackingGlobals->m_currentTarget->SetCurrentDragPasteboard( pasteboard );
	548	GetDragMouse( theDrag, &mouse, 0L );
	549	localMouse = mouse;
	550	localx = localMouse.h;
	551	localy = localMouse.v;
	552	wxNonOwnedWindow* tlw = wxNonOwnedWindow::GetFromWXWindow((WXWindow) theWindow);
	553	if ( tlw )
	554	tlw->GetNonOwnedPeer()->ScreenToWindow( &localx, &localy );
	555
	556	// TODO : should we use client coordinates?
	557	if ( trackingGlobals->m_currentTargetWindow )
	558	trackingGlobals->m_currentTargetWindow->MacRootWindowToWindow( &localx, &localy );
	559	if ( trackingGlobals->m_currentTarget->OnDrop( localx, localy ) )
	560	{
	561	// the option key indicates copy in Mac UI, if it's not pressed do
	562	// move by default if it's allowed at all
	563	wxDragResult
	564	result = !(trackingGlobals->m_flags & wxDrag_AllowMove) \|\|
	565	(GetCurrentKeyModifiers() & optionKey)
	566	? wxDragCopy
	567	: wxDragMove;
	568	trackingGlobals->m_result =
	569	trackingGlobals->m_currentTarget->OnData( localx, localy, result );
	570	}
	571	}
	572
	573	return noErr;
	574	}
	575	#endif
	576
	577	#endif // wxUSE_DRAG_AND_DROP
	578