[wxWidgets.git] / 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;
}

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 )
    {
        PasteboardRef   pasteboard;

        if ( GetDragPasteboard( (DragReference)m_currentDrag, &pasteboard ) == noErr )
        {
            supported = m_dataObject->HasDataInPasteboard( pasteboard );
        }
    }

    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 )
    {
        PasteboardRef   pasteboard;

        if ( GetDragPasteboard(  (DragReference)m_currentDrag, &pasteboard ) == noErr )
        {
            transferred = m_dataObject->GetFromPasteboard( pasteboard );
        }
    }

    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;

    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;

    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...

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

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

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

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

        gTrackingGlobalsInstalled = true;
    }
}

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

    Point mouse, localMouse;
    DragAttributes attributes;

    GetDragAttributes( theDrag, &attributes );

    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->SetCurrentDrag( theDrag );
                            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->SetCurrentDrag( theDrag );
                                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->SetCurrentDrag( theDrag );
                        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 ) )
                  {
                      int 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->SetCurrentDrag( theDrag );
                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;

        trackingGlobals->m_currentTarget->SetCurrentDrag( theDrag );
        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 // wxUSE_DRAG_AND_DROP
Commit	Line	Data
489468fe	1	///////////////////////////////////////////////////////////////////////////////
524c47aa	2	// Name: src/osx/carbon/dnd.cpp
489468fe SC	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
1f0c8f31	24	#include "wx/osx/private.h"
489468fe SC	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	bool wxDropTarget::OnDrop( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y) )
	61	{
	62	if (m_dataObject == NULL)
	63	return false;
	64
	65	return CurrentDragHasSupportedFormat();
	66	}
	67
	68	wxDragResult wxDropTarget::OnData(
	69	wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
	70	wxDragResult def )
	71	{
	72	if (m_dataObject == NULL)
	73	return wxDragNone;
	74
	75	if (!CurrentDragHasSupportedFormat())
	76	return wxDragNone;
	77
	78	return GetData() ? def : wxDragNone;
	79	}
	80
	81	bool wxDropTarget::CurrentDragHasSupportedFormat()
	82	{
	83	bool supported = false;
	84	if (m_dataObject == NULL)
	85	return false;
	86
	87	if ( gTrackingGlobals.m_currentSource != NULL )
	88	{
89	wxDataObject* data = gTrackingGlobals.m_currentSource->GetDataObject();
90
91	if ( data )
92	{
93	size_t formatcount = data->GetFormatCount();
94	wxDataFormat *array = new wxDataFormat[formatcount];
95	data->GetAllFormats( array );
96	for (size_t i = 0; !supported && i < formatcount; i++)
97	{
98	wxDataFormat format = array[i];
99	if ( m_dataObject->IsSupported( format ) )
100	{
101	supported = true;
102	break;
103	}
104	}
105
106	delete [] array;
107	}
108	}
109
110	if ( !supported )
111	{
112	PasteboardRef pasteboard;
113
114	if ( GetDragPasteboard( (DragReference)m_currentDrag, &pasteboard ) == noErr )
115	{
116	supported = m_dataObject->HasDataInPasteboard( pasteboard );
117	}
118	}
119
120	return supported;
121	}
122
123	bool wxDropTarget::GetData()
124	{
125	if (m_dataObject == NULL)
126	return false;
127
128	if ( !CurrentDragHasSupportedFormat() )
129	return false;
130
131	bool transferred = false;
132	if ( gTrackingGlobals.m_currentSource != NULL )
133	{
134	wxDataObject* data = gTrackingGlobals.m_currentSource->GetDataObject();
135
136	if (data != NULL)
137	{
138	size_t formatcount = data->GetFormatCount();
139	wxDataFormat *array = new wxDataFormat[formatcount];
140	data->GetAllFormats( array );
141	for (size_t i = 0; !transferred && i < formatcount; i++)
142	{
143	wxDataFormat format = array[i];
144	if ( m_dataObject->IsSupported( format ) )
145	{
146	int size = data->GetDataSize( format );
147	transferred = true;
148
149	if (size == 0)
150	{
151	m_dataObject->SetData( format, 0, 0 );
152	}
153	else
154	{
155	char *d = new char[size];
156	data->GetDataHere( format, (void*)d );
157	m_dataObject->SetData( format, size, d );
158	delete [] d;
159	}
160	}
161	}
162
163	delete [] array;
164	}
165	}
166
167	if ( !transferred )
168	{
169	PasteboardRef pasteboard;
170
171	if ( GetDragPasteboard( (DragReference)m_currentDrag, &pasteboard ) == noErr )
172	{
173	transferred = m_dataObject->GetFromPasteboard( pasteboard );
174	}
175	}
176
177	return transferred;
178	}
179
180	//-------------------------------------------------------------------------
181	// wxDropSource
182	//-------------------------------------------------------------------------
183
184	//-----------------------------------------------------------------------------
185	// drag request
186
187	wxDropSource::wxDropSource(wxWindow *win,
188	const wxCursor &cursorCopy,
189	const wxCursor &cursorMove,
190	const wxCursor &cursorStop)
191	: wxDropSourceBase(cursorCopy, cursorMove, cursorStop)
192	{
193	wxMacEnsureTrackingHandlersInstalled();
194
195	m_window = win;
196	}
197
198	wxDropSource::wxDropSource(wxDataObject& data,
199	wxWindow *win,
200	const wxCursor &cursorCopy,
201	const wxCursor &cursorMove,
202	const wxCursor &cursorStop)
203	: wxDropSourceBase(cursorCopy, cursorMove, cursorStop)
204	{
205	wxMacEnsureTrackingHandlersInstalled();
206
207	SetData( data );
208	m_window = win;
209	}
210
211	wxDropSource::~wxDropSource()
212	{
213	}
214
215	OSStatus wxMacPromiseKeeper(PasteboardRef WXUNUSED(inPasteboard),
216	PasteboardItemID WXUNUSED(inItem),
217	CFStringRef WXUNUSED(inFlavorType),
218	void * WXUNUSED(inContext))
219	{
220	OSStatus err = noErr;
221
222	// we might add promises here later, inContext is the wxDropSource*
223
224	return err;
225	}
226
227	wxDragResult wxDropSource::DoDragDrop(int flags)
228	{
229	wxASSERT_MSG( m_data, wxT("Drop source: no data") );
230
231	if ((m_data == NULL) \|\| (m_data->GetFormatCount() == 0))
232	return (wxDragResult)wxDragNone;
233
234	DragReference theDrag;
235	RgnHandle dragRegion;
236	OSStatus err = noErr;
237	PasteboardRef pasteboard;
238
239	// add data to drag
240
241	err = PasteboardCreate( kPasteboardUniqueName, &pasteboard );
242	if ( err != noErr )
243	return wxDragNone;
244
245	// we add a dummy promise keeper because of strange messages when linking against carbon debug
246	err = PasteboardSetPromiseKeeper( pasteboard, wxMacPromiseKeeper, this );
247	if ( err != noErr )
248	{
249	CFRelease( pasteboard );
250	return wxDragNone;
251	}
252
253	err = PasteboardClear( pasteboard );
254	if ( err != noErr )
255	{
256	CFRelease( pasteboard );
257	return wxDragNone;
258	}
259	PasteboardSynchronize( pasteboard );
260
261	m_data->AddToPasteboard( pasteboard, 1 );
262
263	if (NewDragWithPasteboard( pasteboard , &theDrag) != noErr)
264	{
265	CFRelease( pasteboard );
266	return wxDragNone;
267	}
268
269	dragRegion = NewRgn();
270	RgnHandle tempRgn = NewRgn();
271
272	EventRecord rec;
273	ConvertEventRefToEventRecord( (EventRef) wxTheApp->MacGetCurrentEvent(), &rec );
274
275	const short dragRegionOuterBoundary = 10;
276	const short dragRegionInnerBoundary = 9;
277
278	SetRectRgn(
279	dragRegion,
280	rec.where.h - dragRegionOuterBoundary,
281	rec.where.v - dragRegionOuterBoundary,
282	rec.where.h + dragRegionOuterBoundary,
283	rec.where.v + dragRegionOuterBoundary );
284
285	SetRectRgn(
286	tempRgn,
287	rec.where.h - dragRegionInnerBoundary,
288	rec.where.v - dragRegionInnerBoundary,
289	rec.where.h + dragRegionInnerBoundary,
290	rec.where.v + dragRegionInnerBoundary );
291
292	DiffRgn( dragRegion, tempRgn, dragRegion );
293	DisposeRgn( tempRgn );
294
295	// TODO: work with promises in order to return data
296	// only when drag was successfully completed
297
298	gTrackingGlobals.m_currentSource = this;
299	gTrackingGlobals.m_result = wxDragNone;
300	gTrackingGlobals.m_flags = flags;
301
302	err = TrackDrag( theDrag, &rec, dragRegion );
303
304	DisposeRgn( dragRegion );
305	DisposeDrag( theDrag );
306	CFRelease( pasteboard );
307	gTrackingGlobals.m_currentSource = NULL;
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	pascal OSErr wxMacWindowDragTrackingHandler(
329	DragTrackingMessage theMessage, WindowPtr theWindow,
330	void *handlerRefCon, DragReference theDrag );
331	pascal OSErr wxMacWindowDragReceiveHandler(
332	WindowPtr theWindow, void *handlerRefCon,
333	DragReference theDrag );
334
335	void wxMacEnsureTrackingHandlersInstalled()
336	{
337	if ( !gTrackingGlobalsInstalled )
338	{
339	OSStatus err;
340
341	err = InstallTrackingHandler( NewDragTrackingHandlerUPP(wxMacWindowDragTrackingHandler), 0L, &gTrackingGlobals );
342	verify_noerr( err );
343
344	err = InstallReceiveHandler( NewDragReceiveHandlerUPP(wxMacWindowDragReceiveHandler), 0L, &gTrackingGlobals );
345	verify_noerr( err );
346
347	gTrackingGlobalsInstalled = true;
348	}
349	}
350
351	pascal OSErr wxMacWindowDragTrackingHandler(
352	DragTrackingMessage theMessage, WindowPtr theWindow,
353	void *handlerRefCon, DragReference theDrag )
354	{
355	MacTrackingGlobals* trackingGlobals = (MacTrackingGlobals*) handlerRefCon;
356
357	Point mouse, localMouse;
358	DragAttributes attributes;
359
360	GetDragAttributes( theDrag, &attributes );
361
b2680ced	362	wxNonOwnedWindow* toplevel = wxNonOwnedWindow::GetFromWXWindow( (WXWindow) theWindow );
489468fe SC	363
	364	bool optionDown = GetCurrentKeyModifiers() & optionKey;
	365	wxDragResult result = optionDown ? wxDragCopy : wxDragMove;
	366
	367	switch (theMessage)
	368	{
	369	case kDragTrackingEnterHandler:
	370	case kDragTrackingLeaveHandler:
	371	break;
	372
	373	case kDragTrackingEnterWindow:
	374	if (trackingGlobals != NULL)
	375	{
	376	trackingGlobals->m_currentTargetWindow = NULL;
	377	trackingGlobals->m_currentTarget = NULL;
	378	}
	379	break;
	380
	381	case kDragTrackingInWindow:
	382	if (trackingGlobals == NULL)
	383	break;
	384	if (toplevel == NULL)
	385	break;
	386
	387	GetDragMouse( theDrag, &mouse, 0L );
b2680ced SC	388	int x = mouse.h ;
	389	int y = mouse.v ;
	390	toplevel->GetNonOwnedPeer()->ScreenToWindow( &x, &y );
	391	localMouse.h = x;
	392	localMouse.v = y;
489468fe SC	393
	394	{
	395	wxWindow *win = NULL;
	396	ControlPartCode controlPart;
	397	ControlRef control = FindControlUnderMouse( localMouse, theWindow, &controlPart );
	398	if ( control )
b2680ced	399	win = wxFindWindowFromWXWidget( (WXWidget) control );
489468fe SC	400	else
	401	win = toplevel;
	402
	403	int localx, localy;
	404	localx = localMouse.h;
	405	localy = localMouse.v;
	406
	407	if ( win )
	408	win->MacRootWindowToWindow( &localx, &localy );
	409	if ( win != trackingGlobals->m_currentTargetWindow )
	410	{
	411	if ( trackingGlobals->m_currentTargetWindow )
	412	{
	413	// this window is left
	414	if ( trackingGlobals->m_currentTarget )
	415	{
	416	#ifndef __LP64__
	417	HideDragHilite( theDrag );
	418	#endif
	419	trackingGlobals->m_currentTarget->SetCurrentDrag( theDrag );
	420	trackingGlobals->m_currentTarget->OnLeave();
	421	trackingGlobals->m_currentTarget = NULL;
	422	trackingGlobals->m_currentTargetWindow = NULL;
	423	}
	424	}
	425
	426	if ( win )
	427	{
	428	// this window is entered
	429	trackingGlobals->m_currentTargetWindow = win;
	430	trackingGlobals->m_currentTarget = win->GetDropTarget();
	431	{
	432	if ( trackingGlobals->m_currentTarget )
	433	{
	434	trackingGlobals->m_currentTarget->SetCurrentDrag( theDrag );
	435	result = trackingGlobals->m_currentTarget->OnEnter( localx, localy, result );
	436	}
	437
	438	if ( result != wxDragNone )
	439	{
	440	int x, y;
	441
	442	x = y = 0;
	443	win->MacWindowToRootWindow( &x, &y );
	444	RgnHandle hiliteRgn = NewRgn();
	445	Rect r = { y, x, y + win->GetSize().y, x + win->GetSize().x };
	446	RectRgn( hiliteRgn, &r );
	447	#ifndef __LP64__
	448	ShowDragHilite( theDrag, hiliteRgn, true );
	449	#endif
	450	DisposeRgn( hiliteRgn );
	451	}
	452	}
	453	}
	454	}
	455	else
	456	{
	457	if ( trackingGlobals->m_currentTarget )
	458	{
	459	trackingGlobals->m_currentTarget->SetCurrentDrag( theDrag );
	460	result = trackingGlobals->m_currentTarget->OnDragOver( localx, localy, result );
	461	}
	462	}
	463
464	// set cursor for OnEnter and OnDragOver
465	if ( trackingGlobals->m_currentSource && !trackingGlobals->m_currentSource->GiveFeedback( result ) )
466	{
467	if ( !trackingGlobals->m_currentSource->MacInstallDefaultCursor( result ) )
468	{
469	int cursorID = wxCURSOR_NONE;
470
471	switch (result)
472	{
473	case wxDragCopy:
474	cursorID = wxCURSOR_COPY_ARROW;
475	break;
476
477	case wxDragMove:
478	cursorID = wxCURSOR_ARROW;
479	break;
480
481	case wxDragNone:
482	cursorID = wxCURSOR_NO_ENTRY;
483	break;
484
485	case wxDragError:
486	case wxDragLink:
487	case wxDragCancel:
488	default:
489	// put these here to make gcc happy
490	;
491	}
492
493	if (cursorID != wxCURSOR_NONE)
494	{
495	wxCursor cursor( cursorID );
496	cursor.MacInstall();
497	}
498	}
499	}
500	}
501	break;
502
503	case kDragTrackingLeaveWindow:
504	if (trackingGlobals == NULL)
505	break;
506
507	if (trackingGlobals->m_currentTarget)
508	{
509	trackingGlobals->m_currentTarget->SetCurrentDrag( theDrag );
510	trackingGlobals->m_currentTarget->OnLeave();
511	#ifndef __LP64__
512	HideDragHilite( theDrag );
513	#endif
514	trackingGlobals->m_currentTarget = NULL;
515	}
516	trackingGlobals->m_currentTargetWindow = NULL;
517	break;
518
519	default:
520	break;
521	}
522
523	return noErr;
524	}
525
526	pascal OSErr wxMacWindowDragReceiveHandler(
527	WindowPtr theWindow,
528	void *handlerRefCon,
529	DragReference theDrag)
530	{
531	MacTrackingGlobals* trackingGlobals = (MacTrackingGlobals*)handlerRefCon;
532	if ( trackingGlobals->m_currentTarget )
533	{
534	Point mouse, localMouse;
535	int localx, localy;
536
537	trackingGlobals->m_currentTarget->SetCurrentDrag( theDrag );
538	GetDragMouse( theDrag, &mouse, 0L );
539	localMouse = mouse;
489468fe SC	540	localx = localMouse.h;
489468fe SC	541	localy = localMouse.v;
b2680ced SC	542	wxNonOwnedWindow* tlw = wxNonOwnedWindow::GetFromWXWindow((WXWindow) theWindow);
	543	if ( tlw )
	544	tlw->GetNonOwnedPeer()->ScreenToWindow( &localx, &localy );
489468fe SC	545
	546	// TODO : should we use client coordinates?
	547	if ( trackingGlobals->m_currentTargetWindow )
	548	trackingGlobals->m_currentTargetWindow->MacRootWindowToWindow( &localx, &localy );
	549	if ( trackingGlobals->m_currentTarget->OnDrop( localx, localy ) )
	550	{
	551	// the option key indicates copy in Mac UI, if it's not pressed do
	552	// move by default if it's allowed at all
	553	wxDragResult
	554	result = !(trackingGlobals->m_flags & wxDrag_AllowMove) \|\|
	555	(GetCurrentKeyModifiers() & optionKey)
	556	? wxDragCopy
	557	: wxDragMove;
	558	trackingGlobals->m_result =
	559	trackingGlobals->m_currentTarget->OnData( localx, localy, result );
	560	}
	561	}
	562
	563	return noErr;
	564	}
	565
	566	#endif // wxUSE_DRAG_AND_DROP
	567