+++ /dev/null
-///////////////////////////////////////////////////////////////////////////////
-// Name: src/mac/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/mac/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 = wxFindWinFromMacWindow( 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 );
- localMouse = mouse;
- wxMacGlobalToLocal( theWindow, &localMouse );
-
- {
- wxWindow *win = NULL;
- ControlPartCode controlPart;
- ControlRef control = FindControlUnderMouse( localMouse, theWindow, &controlPart );
- if ( control )
- win = wxFindControlFromMacControl( 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;
- wxMacGlobalToLocal( theWindow, &localMouse );
- localx = localMouse.h;
- localy = localMouse.v;
-
- // 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
-
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