+ 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
projects / wxWidgets.git / blobdiff