vcl/inc/win/dnd_source.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #pragma once
  21
  22 #include <com/sun/star/datatransfer/dnd/XDragSource.hpp>
  23 #include <com/sun/star/datatransfer/dnd/XDragSourceContext.hpp>
  24 #include <com/sun/star/lang/XInitialization.hpp>
  25 #include <osl/mutex.hxx>
  26 #include <cppuhelper/basemutex.hxx>
  27 #include <cppuhelper/compbase.hxx>
  28 #include <com/sun/star/lang/XServiceInfo.hpp>
  29 #include <oleidl.h>
  30
  31 #include <systools/win32/comtools.hxx>
  32
  33 namespace com::sun::star::uno { class XComponentContext; }
  34
  35 using namespace ::com::sun::star::lang;
  36 using namespace ::com::sun::star::uno;
  37 using namespace cppu;
  38 using namespace osl;
  39 using namespace ::com::sun::star::datatransfer;
  40 using namespace ::com::sun::star::datatransfer::dnd;
  41
  42 class SourceContext;
  43 // RIGHT MOUSE BUTTON drag and drop not supported currently.
  44 // ALT modifier is considered to effect a user selection of effects
  45 class DragSource:
  46       public cppu::BaseMutex,
  47       public WeakComponentImplHelper<XDragSource, XInitialization, XServiceInfo>,
  48       public IDropSource
  49
  50 {
  51     Reference<XComponentContext> m_xContext;
  52     HWND m_hAppWindow;
  53
  54     // The mouse button that set off the drag and drop operation
  55     short m_MouseButton;
  56
  57     // First starting a new drag and drop thread if
  58     // the last one has finished
  59     void StartDragImpl(
  60         const DragGestureEvent& trigger,
  61         sal_Int8 sourceActions,
  62         sal_Int32 cursor,
  63         sal_Int32 image,
  64         const Reference<XTransferable >& trans,
  65         const Reference<XDragSourceListener >& listener);
  66
  67 public:
  68     LONG m_RunningDndOperationCount;
  69
  70 public:
  71     // only valid for one dnd operation
  72     // the thread ID of the thread which created the window
  73     DWORD m_threadIdWindow;
  74     // The context notifies the XDragSourceListener s
  75     Reference<XDragSourceContext>   m_currentContext;
  76
  77     // the wrapper for the Transferable ( startDrag)
  78     IDataObjectPtr m_spDataObject;
  79
  80     sal_Int8 m_sourceActions;
  81
  82 public:
  83     explicit DragSource(const Reference<XComponentContext>& rxContext);
  84     virtual ~DragSource() override;
  85     DragSource(const DragSource&) = delete;
  86     DragSource &operator= ( const DragSource&) = delete;
  87
  88   // XInitialization
  89     virtual void SAL_CALL initialize( const Sequence< Any >& aArguments ) override;
  90
  91     // XDragSource
  92     virtual sal_Bool SAL_CALL isDragImageSupported(  ) override;
  93     virtual sal_Int32 SAL_CALL getDefaultCursor( sal_Int8 dragAction ) override;
  94     virtual void SAL_CALL startDrag( const DragGestureEvent& trigger,
  95                                      sal_Int8 sourceActions,
  96                                      sal_Int32 cursor,
  97                                      sal_Int32 image,
  98                                      const Reference<XTransferable >& trans,
  99                                      const Reference<XDragSourceListener >& listener ) override;
 100
 101     // XServiceInfo
 102     virtual OUString SAL_CALL getImplementationName(  ) override;
 103     virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
 104     virtual Sequence< OUString > SAL_CALL getSupportedServiceNames(  ) override;
 105
 106     virtual HRESULT STDMETHODCALLTYPE QueryInterface(
 107             /* [in] */ REFIID riid,
 108             /* [iid_is][out] */ void __RPC_FAR *__RPC_FAR *ppvObject) override;
 109
 110     virtual ULONG STDMETHODCALLTYPE AddRef( ) override;
 111
 112     virtual ULONG STDMETHODCALLTYPE Release( ) override;
 113
 114     // IDropSource
 115     virtual HRESULT STDMETHODCALLTYPE QueryContinueDrag(
 116         /* [in] */ BOOL fEscapePressed,
 117         /* [in] */ DWORD grfKeyState) override;
 118
 119     virtual HRESULT STDMETHODCALLTYPE GiveFeedback(
 120         /* [in] */ DWORD dwEffect) override;
 121
 122 };
 123
 124 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */