1 /************************************************************** 2 * 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, 14 * software distributed under the License is distributed on an 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 * KIND, either express or implied. See the License for the 17 * specific language governing permissions and limitations 18 * under the License. 19 * 20 *************************************************************/ 21 22 23 #ifndef _TARGET_HXX_ 24 #define _TARGET_HXX_ 25 26 #include <com/sun/star/lang/XInitialization.hpp> 27 #include <com/sun/star/datatransfer/dnd/XDropTarget.hpp> 28 #include <com/sun/star/datatransfer/dnd/DropTargetDragEnterEvent.hpp> 29 #include <com/sun/star/lang/XServiceInfo.hpp> 30 31 #ifndef _CPPUHELPER_COMPBASE2_HXX_ 32 #include <cppuhelper/compbase3.hxx> 33 #endif 34 #include <cppuhelper/interfacecontainer.hxx> 35 #ifndef _OSL_MUTEX_H_ 36 #include <osl/mutex.hxx> 37 #endif 38 39 #if defined _MSC_VER 40 #pragma warning(push,1) 41 #endif 42 #include <oleidl.h> 43 #if defined _MSC_VER 44 #pragma warning(pop) 45 #endif 46 #include "globals.hxx" 47 #include "../../inc/DtObjFactory.hxx" 48 49 50 using namespace ::com::sun::star::lang; 51 using namespace ::com::sun::star::uno; 52 using namespace cppu; 53 using namespace osl; 54 using namespace rtl; 55 using namespace ::com::sun::star::datatransfer; 56 using namespace ::com::sun::star::datatransfer::dnd; 57 58 59 // The client 60 // has to call XComponent::dispose. The thread that calls initialize 61 // must also execute the destruction of the instance. This is because 62 // initialize calls OleInitialize and the destructor calls OleUninitialize. 63 // If the service calls OleInitialize then it also calls OleUnitialize when 64 // it is destroyed. Therefore no second instance may exist which was 65 // created in the same thread and still needs OLE. 66 class DropTarget: public MutexDummy, 67 public WeakComponentImplHelper3< XInitialization, XDropTarget, XServiceInfo> 68 69 { 70 private: 71 friend DWORD WINAPI DndTargetOleSTAFunc(LPVOID pParams); 72 // The native window which acts as drop target. 73 // It is set in initialize. In case RegisterDragDrop fails it is set 74 // to NULL 75 HWND m_hWnd; // set by initialize 76 // Holds the thread id of the thread which created the window that is the 77 // drop target. Only used when DropTarget::initialize is called from an MTA 78 // thread 79 DWORD m_threadIdWindow; 80 // This is the thread id of the OLE thread that is created in DropTarget::initialize 81 // when the calling thread is an MTA 82 DWORD m_threadIdTarget; 83 // The handle of the thread that is created in DropTarget::initialize 84 // when the calling thread is an MTA 85 HANDLE m_hOleThread; 86 // The thread id of the thread which called initialize. When the service dies 87 // than m_oleThreadId is used to determine if the service successfully called 88 // OleInitialize. If so then OleUninitialize has to be called. 89 DWORD m_oleThreadId; 90 // An Instance of IDropTargetImpl which receives calls from the system's drag 91 // and drop implementation. It delegate the calls to name alike functions in 92 // this class. 93 IDropTarget* m_pDropTarget; 94 95 Reference<XMultiServiceFactory> m_serviceFactory; 96 // If m_bActive == sal_True then events are fired to XDropTargetListener s, 97 // none otherwise. The default value is sal_True. 98 sal_Bool m_bActive; 99 sal_Int8 m_nDefaultActions; 100 101 // This value is set when a XDropTargetListener calls accept or reject on 102 // the XDropTargetDropContext or XDropTargetDragContext. 103 // The values are from the DNDConstants group. 104 sal_Int8 m_nCurrentDropAction; 105 // This value is manipulated by the XDropTargetListener 106 sal_Int8 m_nLastDropAction; 107 108 Reference<XTransferable> m_currentData; 109 // The current action is used to determine if the USER 110 // action has changed (dropActionChanged) 111 // sal_Int8 m_userAction; 112 // Set by listeners when they call XDropTargetDropContext::dropComplete 113 sal_Bool m_bDropComplete; 114 // converts IDataObject objects to XTransferable objects. 115 CDTransObjFactory m_aDataConverter; 116 Reference<XDropTargetDragContext> m_currentDragContext; 117 Reference<XDropTargetDropContext> m_currentDropContext; 118 119 120 private: 121 DropTarget(); 122 DropTarget(DropTarget&); 123 DropTarget &operator= (DropTarget&); 124 125 public: 126 DropTarget(const Reference<XMultiServiceFactory>& sf); 127 virtual ~DropTarget(); 128 129 // Overrides WeakComponentImplHelper::disposing which is called by 130 // WeakComponentImplHelper::dispose 131 // Must be called. 132 virtual void SAL_CALL disposing(); 133 // XInitialization 134 virtual void SAL_CALL initialize( const Sequence< Any >& aArguments ) 135 throw(Exception, RuntimeException); 136 137 // XDropTarget 138 virtual void SAL_CALL addDropTargetListener( const Reference< XDropTargetListener >& dtl ) 139 throw(RuntimeException); 140 virtual void SAL_CALL removeDropTargetListener( const Reference< XDropTargetListener >& dtl ) 141 throw(RuntimeException); 142 // Default is not active 143 virtual sal_Bool SAL_CALL isActive( ) throw(RuntimeException); 144 virtual void SAL_CALL setActive( sal_Bool isActive ) throw(RuntimeException); 145 virtual sal_Int8 SAL_CALL getDefaultActions( ) throw(RuntimeException); 146 virtual void SAL_CALL setDefaultActions( sal_Int8 actions ) throw(RuntimeException); 147 148 // XServiceInfo 149 virtual OUString SAL_CALL getImplementationName( ) throw (RuntimeException); 150 virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) throw (RuntimeException); 151 virtual Sequence< OUString > SAL_CALL getSupportedServiceNames( ) throw (RuntimeException); 152 153 154 // Functions called from the IDropTarget implementation ( m_pDropTarget) 155 virtual HRESULT DragEnter( 156 /* [unique][in] */ IDataObject *pDataObj, 157 /* [in] */ DWORD grfKeyState, 158 /* [in] */ POINTL pt, 159 /* [out][in] */ DWORD *pdwEffect); 160 161 virtual HRESULT STDMETHODCALLTYPE DragOver( 162 /* [in] */ DWORD grfKeyState, 163 /* [in] */ POINTL pt, 164 /* [out][in] */ DWORD *pdwEffect); 165 166 virtual HRESULT STDMETHODCALLTYPE DragLeave( ) ; 167 168 virtual HRESULT STDMETHODCALLTYPE Drop( 169 /* [unique][in] */ IDataObject *pDataObj, 170 /* [in] */ DWORD grfKeyState, 171 /* [in] */ POINTL pt, 172 /* [out][in] */ DWORD *pdwEffect); 173 174 175 // Non - interface functions -------------------------------------------------- 176 // XDropTargetDropContext delegated from DropContext 177 178 void _acceptDrop( sal_Int8 dropOperation, const Reference<XDropTargetDropContext>& context); 179 void _rejectDrop( const Reference<XDropTargetDropContext>& context); 180 void _dropComplete( sal_Bool success, const Reference<XDropTargetDropContext>& context); 181 182 // XDropTargetDragContext delegated from DragContext 183 void _acceptDrag( sal_Int8 dragOperation, const Reference<XDropTargetDragContext>& context); 184 void _rejectDrag( const Reference<XDropTargetDragContext>& context); 185 186 187 protected: 188 // Gets the current action dependend on the pressed modifiers, the effects 189 // supported by the drop source (IDropSource) and the default actions of the 190 // drop target (XDropTarget, this class)) 191 inline sal_Int8 getFilteredActions( DWORD grfKeyState, DWORD sourceActions); 192 // Only filters with the default actions 193 inline sal_Int8 getFilteredActions( DWORD grfKeyState); 194 195 196 197 void fire_drop( const DropTargetDropEvent& dte); 198 void fire_dragEnter( const DropTargetDragEnterEvent& dtde ); 199 void fire_dragExit( const DropTargetEvent& dte ); 200 void fire_dragOver( const DropTargetDragEvent& dtde ); 201 void fire_dropActionChanged( const DropTargetDragEvent& dtde ); 202 203 204 205 206 }; 207 208 209 #endif 210