new drag and drop api

1 files changed, 341 insertions, 0 deletions

diff --git a/vcl/source/window/dndevdis.cxx b/vcl/source/window/dndevdis.cxx
new file mode 100644
index 000000000000..80b562b4dce6
--- /dev/null
+++ b/vcl/source/window/dndevdis.cxx
@@ -0,0 +1,341 @@
+/*************************************************************************
+ *
+ *  $RCSfile: dndevdis.cxx,v $
+ *
+ *  $Revision: 1.1 $
+ *
+ *  last change: $Author: obr $ $Date: 2001-02-05 09:45:05 $
+ *
+ *  The Contents of this file are made available subject to the terms of
+ *  either of the following licenses
+ *
+ *         - GNU Lesser General Public License Version 2.1
+ *         - Sun Industry Standards Source License Version 1.1
+ *
+ *  Sun Microsystems Inc., October, 2000
+ *
+ *  GNU Lesser General Public License Version 2.1
+ *  =============================================
+ *  Copyright 2000 by Sun Microsystems, Inc.
+ *  901 San Antonio Road, Palo Alto, CA 94303, USA
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License version 2.1, as published by the Free Software Foundation.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ *  MA  02111-1307  USA
+ *
+ *
+ *  Sun Industry Standards Source License Version 1.1
+ *  =================================================
+ *  The contents of this file are subject to the Sun Industry Standards
+ *  Source License Version 1.1 (the "License"); You may not use this file
+ *  except in compliance with the License. You may obtain a copy of the
+ *  License at http://www.openoffice.org/license.html.
+ *
+ *  Software provided under this License is provided on an "AS IS" basis,
+ *  WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
+ *  WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
+ *  MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
+ *  See the License for the specific provisions governing your rights and
+ *  obligations concerning the Software.
+ *
+ *  The Initial Developer of the Original Code is: Sun Microsystems, Inc.
+ *
+ *  Copyright: 2000 by Sun Microsystems, Inc.
+ *
+ *  All Rights Reserved.
+ *
+ *  Contributor(s): _______________________________________
+ *
+ *
+ ************************************************************************/
+
+#include <dndevdis.hxx>
+#include <dndlcon.hxx>
+
+#include <vos/mutex.hxx>
+#include <svapp.hxx>
+
+using namespace ::vos;
+using namespace ::cppu;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::lang;
+using namespace ::com::sun::star::datatransfer;
+using namespace ::com::sun::star::datatransfer::dnd;
+
+//==================================================================================================
+// DNDEventDispatcher::DNDEventDispatcher
+//==================================================================================================
+
+DNDEventDispatcher::DNDEventDispatcher( Window * pTopWindow ):
+    m_pTopWindow( pTopWindow ),
+    m_pCurrentWindow( NULL )
+{
+}
+
+//==================================================================================================
+// DNDEventDispatcher::~DNDEventDispatcher
+//==================================================================================================
+
+DNDEventDispatcher::~DNDEventDispatcher()
+{
+}
+
+//==================================================================================================
+// DNDEventDispatcher::drop
+//==================================================================================================
+
+void SAL_CALL DNDEventDispatcher::drop( const DropTargetDropEvent& dtde )
+    throw(RuntimeException)
+{
+    Point location( dtde.Location.X, dtde.Location.Y );
+    sal_Bool bSendDragEnter = sal_False;
+
+    // find the window that is toplevel for this coordinates
+    OClearableGuard aGuard( Application::GetSolarMutex() );
+    Window * pChildWindow = m_pTopWindow->ImplFindWindow( location );
+    aGuard.clear();
+
+    // handle the case that drop is in an other vcl window than the last dragOver
+    if( pChildWindow != m_pCurrentWindow )
+    {
+        // fire dragExit on listeners of previous window
+        dragExit( dtde );
+
+        // remember to send drag enter later
+        bSendDragEnter = sal_True;
+    }
+
+    sal_Int32 nListeners = 0;
+
+    // send drop event to the child window
+    if( pChildWindow )
+    {
+        OClearableGuard aGuard2( Application::GetSolarMutex() );
+
+        // query DropTarget from child window
+        Reference< XDropTarget > xDropTarget = pChildWindow->GetDropTarget();
+
+        if( xDropTarget.is() )
+        {
+            // retrieve relative mouse position
+            Point relLoc = pChildWindow->ImplFrameToOutput( location );
+            aGuard2.clear();
+
+            // send DragEnterEvent if other window than at last dragOver
+            if( bSendDragEnter )
+            {
+                static_cast < DNDListenerContainer * > ( xDropTarget.get() )->
+                    fireDragEnterEvent( static_cast < XDropTargetDragContext * > (dtde.Context.get()),
+                        dtde.DropAction, ::com::sun::star::awt::Point( relLoc.X(), relLoc.Y() ),
+                        dtde.SourceActions );
+            }
+
+            // fire...Event returns the number of listeners found
+            nListeners = static_cast < DNDListenerContainer * > ( xDropTarget.get() )->
+                fireDropEvent( dtde.Context, dtde.DropAction,
+                    ::com::sun::star::awt::Point( relLoc.X(), relLoc.Y() ),
+                    dtde.SourceActions, dtde.Transferable );
+        }
+    }
+
+    // reject drop if no listeners found
+    if( nListeners == 0 )
+        dtde.Context->reject();
+}
+
+//==================================================================================================
+// DNDEventDispatcher::dragEnter
+//==================================================================================================
+
+void SAL_CALL DNDEventDispatcher::dragEnter( const DropTargetDragEvent& dtde )
+    throw(RuntimeException)
+{
+    sal_Int32 nListeners;
+
+    // find the window that is toplevel for this coordinates
+    OClearableGuard aGuard( Application::GetSolarMutex() );
+    Window * pChildWindow = m_pTopWindow->ImplFindWindow( Point( dtde.Location.X, dtde.Location.Y ) );
+    aGuard.clear();
+
+    // assume pointer write operation to be atomic
+    m_pCurrentWindow = pChildWindow;
+
+    // fire dropActionChanged on listeners of current window
+    nListeners = dragAction( 3, pChildWindow, dtde );
+
+    // reject drag if no listener found
+    if( nListeners == 0 )
+        dtde.Context->reject();
+}
+
+//==================================================================================================
+// DNDEventDispatcher::dragExit
+//==================================================================================================
+
+void SAL_CALL DNDEventDispatcher::dragExit( const DropTargetEvent& dte )
+    throw(RuntimeException)
+{
+    Window * pChildWindow = m_pCurrentWindow;
+
+    // send the last window a drag exit
+    if( pChildWindow )
+    {
+        OClearableGuard aGuard( Application::GetSolarMutex() );
+
+        // query DropTarget from child window
+        Reference< XDropTarget > xDropTarget = pChildWindow->GetDropTarget();
+        aGuard.clear();
+
+        if( xDropTarget.is() )
+            static_cast < DNDListenerContainer * > ( xDropTarget.get() )->fireDragExitEvent();
+    }
+
+    // reset current window
+    m_pCurrentWindow = NULL;
+}
+
+//==================================================================================================
+// DNDEventDispatcher::dragOver
+//==================================================================================================
+
+void SAL_CALL DNDEventDispatcher::dragOver( const DropTargetDragEvent& dtde )
+    throw(RuntimeException)
+{
+    sal_Int32 nListeners;
+
+    // find the window that is toplevel for this coordinates
+    OClearableGuard aGuard( Application::GetSolarMutex() );
+    Window * pChildWindow = m_pTopWindow->ImplFindWindow( Point( dtde.Location.X, dtde.Location.Y ) );
+    aGuard.clear();
+
+    if( pChildWindow != m_pCurrentWindow )
+    {
+        // fire dragExit on listeners of previous window
+        dragExit( dtde );
+
+        // remember new window
+        m_pCurrentWindow = pChildWindow;
+
+        // fire dragEnter on listeners of current window
+        nListeners = dragAction( 1, pChildWindow, dtde );
+    }
+    else
+    {
+        // fire dropActionChanged on listeners of current window
+        nListeners = dragAction( 2, pChildWindow, dtde );
+    }
+
+    // reject drag if no listener found
+    if( nListeners == 0 )
+        dtde.Context->reject();
+}
+
+//==================================================================================================
+// DNDEventDispatcher::dropActionChanged
+//==================================================================================================
+
+void SAL_CALL DNDEventDispatcher::dropActionChanged( const DropTargetDragEvent& dtde )
+    throw(RuntimeException)
+{
+    sal_Int32 nListeners;
+
+    // find the window that is toplevel for this coordinates
+    OClearableGuard aGuard( Application::GetSolarMutex() );
+    Window * pChildWindow = m_pTopWindow->ImplFindWindow( Point( dtde.Location.X, dtde.Location.Y ) );
+    aGuard.clear();
+
+    if( pChildWindow != m_pCurrentWindow )
+    {
+        // fire dragExit on listeners of previous window
+        dragExit( dtde );
+
+        // remember new window
+        m_pCurrentWindow = pChildWindow;
+
+        // fire dragEnter on listeners of current window
+        nListeners = dragAction( 1, pChildWindow, dtde );
+    }
+    else
+    {
+        // fire dropActionChanged on listeners of current window
+        nListeners = dragAction( 3, pChildWindow, dtde );
+    }
+
+    // reject drag if no listener found
+    if( nListeners == 0 )
+        dtde.Context->reject();
+}
+
+
+//==================================================================================================
+// DNDEventDispatcher::disposing
+//==================================================================================================
+
+void SAL_CALL DNDEventDispatcher::disposing( const EventObject& eo )
+    throw(RuntimeException)
+{
+}
+
+//==================================================================================================
+// DNDEventDispatcher::dragAction
+//==================================================================================================
+
+sal_Int32 DNDEventDispatcher::dragAction( sal_Int8 action, Window * pWindow, const DropTargetDragEvent& dtde )
+{
+    sal_Int32 n = 0;
+
+    if( pWindow )
+    {
+        OClearableGuard aGuard( Application::GetSolarMutex() );
+
+        // query DropTarget from window
+        Reference< XDropTarget > xDropTarget = pWindow->GetDropTarget();
+
+        if( xDropTarget.is() )
+        {
+            // retrieve relative mouse position
+            Point relLoc = pWindow->ImplFrameToOutput( Point( dtde.Location.X, dtde.Location.Y ) );
+            aGuard.clear();
+
+            // fire...Event returns the number of listeners found
+            switch( action )
+            {
+            case 1:
+                n = static_cast < DNDListenerContainer * > ( xDropTarget.get() )->
+                    fireDragEnterEvent( dtde.Context, dtde.DropAction,
+                        ::com::sun::star::awt::Point( relLoc.X(), relLoc.Y() ),
+                        dtde.SourceActions );
+                break;
+
+            case 2:
+                n = static_cast < DNDListenerContainer * > ( xDropTarget.get() )->
+                    fireDragOverEvent( dtde.Context, dtde.DropAction,
+                        ::com::sun::star::awt::Point( relLoc.X(), relLoc.Y() ),
+                        dtde.SourceActions );
+                break;
+
+            case 3:
+                n = static_cast < DNDListenerContainer * > ( xDropTarget.get() )->
+                    fireDropActionChangedEvent( dtde.Context, dtde.DropAction,
+                        ::com::sun::star::awt::Point( relLoc.X(), relLoc.Y() ),
+                        dtde.SourceActions );
+                break;
+
+            default:
+                ;
+            }
+        }
+    }
+
+    return n;
+}