dnd_source.hxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 * 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
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#pragma once
 
#include <com/sun/star/datatransfer/dnd/XDragSource.hpp>
#include <com/sun/star/datatransfer/dnd/XDragSourceContext.hpp>
#include <com/sun/star/lang/XInitialization.hpp>
#include <osl/mutex.hxx>
#include <cppuhelper/basemutex.hxx>
#include <cppuhelper/compbase.hxx>
#include <com/sun/star/lang/XServiceInfo.hpp>
#include <oleidl.h>
 
#include <systools/win32/comtools.hxx>
 
namespace com::sun::star::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;
 
class SourceContext;
// RIGHT MOUSE BUTTON drag and drop not supported currently.
// ALT modifier is considered to effect a user selection of effects
class DragSource:
      public cppu::BaseMutex,
      public WeakComponentImplHelper<XDragSource, XInitialization, XServiceInfo>,
      public IDropSource
 
{
    Reference<XComponentContext> m_xContext;
    HWND m_hAppWindow;
 
    // The mouse button that set off the drag and drop operation
    short m_MouseButton;
 
    // First starting a new drag and drop thread if
    // the last one has finished
    void StartDragImpl(
        const DragGestureEvent& trigger,
        sal_Int8 sourceActions,
        sal_Int32 cursor,
        sal_Int32 image,
        const Reference<XTransferable >& trans,
        const Reference<XDragSourceListener >& listener);
 
public:
    LONG m_RunningDndOperationCount;
 
public:
    // only valid for one dnd operation
    // the thread ID of the thread which created the window
    DWORD m_threadIdWindow;
    // The context notifies the XDragSourceListener s
    Reference<XDragSourceContext>   m_currentContext;
 
    // the wrapper for the Transferable ( startDrag)
    IDataObjectPtr m_spDataObject;
 
    sal_Int8 m_sourceActions;
 
public:
    explicit DragSource(const Reference<XComponentContext>& rxContext);
    virtual ~DragSource() override;
    DragSource(const DragSource&) = delete;
    DragSource &operator= ( const DragSource&) = delete;
 
  // XInitialization
    virtual void SAL_CALL initialize( const Sequence< Any >& aArguments ) override;
 
    // XDragSource
    virtual sal_Bool SAL_CALL isDragImageSupported(  ) override;
    virtual sal_Int32 SAL_CALL getDefaultCursor( sal_Int8 dragAction ) override;
    virtual void SAL_CALL startDrag( const DragGestureEvent& trigger,
                                     sal_Int8 sourceActions,
                                     sal_Int32 cursor,
                                     sal_Int32 image,
                                     const Reference<XTransferable >& trans,
                                     const Reference<XDragSourceListener >& listener ) override;
 
    // XServiceInfo
    virtual OUString SAL_CALL getImplementationName(  ) override;
    virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
    virtual Sequence< OUString > SAL_CALL getSupportedServiceNames(  ) override;
 
    virtual HRESULT STDMETHODCALLTYPE QueryInterface(
            /* [in] */ REFIID riid,
            /* [iid_is][out] */ void __RPC_FAR *__RPC_FAR *ppvObject) override;
 
    virtual ULONG STDMETHODCALLTYPE AddRef( ) override;
 
    virtual ULONG STDMETHODCALLTYPE Release( ) override;
 
    // IDropSource
    virtual HRESULT STDMETHODCALLTYPE QueryContinueDrag(
        /* [in] */ BOOL fEscapePressed,
        /* [in] */ DWORD grfKeyState) override;
 
    virtual HRESULT STDMETHODCALLTYPE GiveFeedback(
        /* [in] */ DWORD dwEffect) override;
 
};
 
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