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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 .
*/
#ifndef INCLUDED_DTRANS_SOURCE_WIN32_DND_TARGET_HXX
#define INCLUDED_DTRANS_SOURCE_WIN32_DND_TARGET_HXX
#include <com/sun/star/lang/XInitialization.hpp>
#include <com/sun/star/datatransfer/dnd/XDropTarget.hpp>
#include <com/sun/star/datatransfer/dnd/DropTargetDragEnterEvent.hpp>
#include <com/sun/star/lang/XServiceInfo.hpp>
#include <cppuhelper/compbase.hxx>
#include <cppuhelper/interfacecontainer.hxx>
#include <osl/mutex.hxx>
#if defined _MSC_VER
#pragma warning(push,1)
#endif
#include <oleidl.h>
#if defined _MSC_VER
#pragma warning(pop)
#endif
#include "globals.hxx"
namespace com { namespace sun { namespace star { namespace uno {
class XComponentContext;
} } } }
using namespace ::com::sun::star::lang;
using namespace ::com::sun::star::uno;
using namespace cppu;
using namespace osl;
using namespace ::com::sun::star::datatransfer;
using namespace ::com::sun::star::datatransfer::dnd;
// The client
// has to call XComponent::dispose. The thread that calls initialize
// must also execute the destruction of the instance. This is because
// initialize calls OleInitialize and the destructor calls OleUninitialize.
// If the service calls OleInitialize then it also calls OleUnitialize when
// it is destroyed. Therefore no second instance may exist which was
// created in the same thread and still needs OLE.
class DropTarget: public MutexDummy,
public WeakComponentImplHelper< XInitialization, XDropTarget, XServiceInfo>
{
private:
friend DWORD WINAPI DndTargetOleSTAFunc(LPVOID pParams);
// The native window which acts as drop target.
// It is set in initialize. In case RegisterDragDrop fails it is set
// to NULL
HWND m_hWnd; // set by initialize
// Holds the thread id of the thread which created the window that is the
// drop target. Only used when DropTarget::initialize is called from an MTA
// thread
DWORD m_threadIdWindow;
// This is the thread id of the OLE thread that is created in DropTarget::initialize
// when the calling thread is an MTA
DWORD m_threadIdTarget;
// The handle of the thread that is created in DropTarget::initialize
// when the calling thread is an MTA
HANDLE m_hOleThread;
// The thread id of the thread which called initialize. When the service dies
// than m_oleThreadId is used to determine if the service successfully called
// OleInitialize. If so then OleUninitialize has to be called.
DWORD m_oleThreadId;
// An Instance of IDropTargetImpl which receives calls from the system's drag
// and drop implementation. It delegate the calls to name alike functions in
// this class.
IDropTarget* m_pDropTarget;
Reference<XComponentContext> m_xContext;
// If m_bActive == sal_True then events are fired to XDropTargetListener s,
// none otherwise. The default value is sal_True.
sal_Bool m_bActive;
sal_Int8 m_nDefaultActions;
// This value is set when a XDropTargetListener calls accept or reject on
// the XDropTargetDropContext or XDropTargetDragContext.
// The values are from the DNDConstants group.
sal_Int8 m_nCurrentDropAction;
// This value is manipulated by the XDropTargetListener
sal_Int8 m_nLastDropAction;
Reference<XTransferable> m_currentData;
// The current action is used to determine if the USER
// action has changed (dropActionChanged)
// sal_Int8 m_userAction;
// Set by listeners when they call XDropTargetDropContext::dropComplete
sal_Bool m_bDropComplete;
Reference<XDropTargetDragContext> m_currentDragContext;
Reference<XDropTargetDropContext> m_currentDropContext;
private:
DropTarget();
DropTarget(DropTarget&);
DropTarget &operator= (DropTarget&);
public:
explicit DropTarget(const Reference<XComponentContext>& rxContext);
virtual ~DropTarget();
// Overrides WeakComponentImplHelper::disposing which is called by
// WeakComponentImplHelper::dispose
// Must be called.
virtual void SAL_CALL disposing();
// XInitialization
virtual void SAL_CALL initialize( const Sequence< Any >& aArguments )
throw(Exception, RuntimeException);
// XDropTarget
virtual void SAL_CALL addDropTargetListener( const Reference< XDropTargetListener >& dtl )
throw(RuntimeException);
virtual void SAL_CALL removeDropTargetListener( const Reference< XDropTargetListener >& dtl )
throw(RuntimeException);
// Default is not active
virtual sal_Bool SAL_CALL isActive( ) throw(RuntimeException);
virtual void SAL_CALL setActive( sal_Bool isActive ) throw(RuntimeException);
virtual sal_Int8 SAL_CALL getDefaultActions( ) throw(RuntimeException);
virtual void SAL_CALL setDefaultActions( sal_Int8 actions ) throw(RuntimeException);
// XServiceInfo
virtual OUString SAL_CALL getImplementationName( ) throw (RuntimeException);
virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) throw (RuntimeException);
virtual Sequence< OUString > SAL_CALL getSupportedServiceNames( ) throw (RuntimeException);
// Functions called from the IDropTarget implementation ( m_pDropTarget)
virtual HRESULT DragEnter(
/* [unique][in] */ IDataObject *pDataObj,
/* [in] */ DWORD grfKeyState,
/* [in] */ POINTL pt,
/* [out][in] */ DWORD *pdwEffect);
virtual HRESULT STDMETHODCALLTYPE DragOver(
/* [in] */ DWORD grfKeyState,
/* [in] */ POINTL pt,
/* [out][in] */ DWORD *pdwEffect);
virtual HRESULT STDMETHODCALLTYPE DragLeave( ) ;
virtual HRESULT STDMETHODCALLTYPE Drop(
/* [unique][in] */ IDataObject *pDataObj,
/* [in] */ DWORD grfKeyState,
/* [in] */ POINTL pt,
/* [out][in] */ DWORD *pdwEffect);
// Non - interface functions --------------------------------------------------
// XDropTargetDropContext delegated from DropContext
void _acceptDrop( sal_Int8 dropOperation, const Reference<XDropTargetDropContext>& context);
void _rejectDrop( const Reference<XDropTargetDropContext>& context);
void _dropComplete( sal_Bool success, const Reference<XDropTargetDropContext>& context);
// XDropTargetDragContext delegated from DragContext
void _acceptDrag( sal_Int8 dragOperation, const Reference<XDropTargetDragContext>& context);
void _rejectDrag( const Reference<XDropTargetDragContext>& context);
protected:
// Gets the current action dependent on the pressed modifiers, the effects
// supported by the drop source (IDropSource) and the default actions of the
// drop target (XDropTarget, this class))
inline sal_Int8 getFilteredActions( DWORD grfKeyState, DWORD sourceActions);
// Only filters with the default actions
inline sal_Int8 getFilteredActions( DWORD grfKeyState);
void fire_drop( const DropTargetDropEvent& dte);
void fire_dragEnter( const DropTargetDragEnterEvent& dtde );
void fire_dragExit( const DropTargetEvent& dte );
void fire_dragOver( const DropTargetDragEvent& dtde );
void fire_dropActionChanged( const DropTargetDragEvent& dtde );
};
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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