    /* -*- 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 .
     */

    #include <TableConnection.hxx>
    #include <ConnectionLine.hxx>
    #include <TableConnectionData.hxx>
    #include <JoinTableView.hxx>
    #include <ConnectionLineAccess.hxx>

    using namespace dbaui;
    using namespace comphelper;
    using namespace ::com::sun::star::uno;
    using namespace ::com::sun::star::accessibility;

    // class OTableConnection
    namespace dbaui
    {
        OTableConnection::OTableConnection( OJoinTableView* _pContainer,const TTableConnectionData::value_type& _pTabConnData )
            :Window(_pContainer)
            ,m_pData( _pTabConnData )
            ,m_pParent( _pContainer )
            ,m_bSelected( false )
        {
            Init();
            Show();
        }

        OTableConnection::OTableConnection( const OTableConnection& _rConn )
            : VclReferenceBase()
             ,Window(_rConn.m_pParent.get())
             ,m_pData(_rConn.GetData()->NewInstance())
             ,m_pParent(nullptr)
        {
            *this = _rConn;
        }

        void OTableConnection::Init()
        {
            // initialise linelist with defaults
            OConnectionLineDataVec& rLineData = GetData()->GetConnLineDataList();
            m_vConnLine.reserve(rLineData.size());
            for (auto const& elem : rLineData)
                m_vConnLine.emplace_back( new OConnectionLine(this, elem) );
        }

        void OTableConnection::clearLineData()
        {
            m_vConnLine.clear();
        }
        void OTableConnection::UpdateLineList()
        {
            // delete linelist
            clearLineData();

            Init();
        }

        OTableConnection& OTableConnection::operator=( const OTableConnection& rConn )
        {
            if( &rConn == this )
                return *this;

            // delete linelist
            clearLineData();

            // copy linelist
            if(! rConn.GetConnLineList().empty() )
            {
                const std::vector<std::unique_ptr<OConnectionLine>>& rLine = rConn.GetConnLineList();
                m_vConnLine.reserve(rLine.size());
                for (auto const& elem : rLine)
                    m_vConnLine.emplace_back( new OConnectionLine(*elem));
            }

            // as the data are not mine, I also do not delete the old
            m_pData->CopyFrom(*rConn.GetData());
            // CopyFrom is virtual, therefore it is not a problem if m_pData is a derived type of OTableConnectionData

            m_bSelected = rConn.m_bSelected;
            m_pParent = rConn.m_pParent;

            return *this;
        }

        void OTableConnection::RecalcLines()
        {
            // call RecalcLines on each line
            for( const auto& pLine : m_vConnLine )
                pLine->RecalcLine();
        }
        OTableWindow* OTableConnection::GetSourceWin() const
        {
            TTableWindowData::value_type pRef = GetData()->getReferencingTable();
            OTableWindow* pRet = m_pParent->GetTabWindow( pRef->GetWinName() );
            if ( !pRet )
            {
                pRet = m_pParent->GetTabWindow( pRef->GetComposedName() );
            }
            return pRet;
        }
        OTableWindow* OTableConnection::GetDestWin() const
        {
            TTableWindowData::value_type pRef = GetData()->getReferencedTable();
            OTableWindow* pRet = m_pParent->GetTabWindow( pRef->GetWinName() );
            if ( !pRet )
            {
                pRet = m_pParent->GetTabWindow( pRef->GetComposedName() );
            }
            return pRet;
        }

        void OTableConnection::Select()
        {
            m_bSelected = true;
            m_pParent->Invalidate( GetBoundingRect(), InvalidateFlags::NoChildren);
        }

        void OTableConnection::Deselect()
        {
            m_bSelected = false;
            InvalidateConnection();
        }

        bool OTableConnection::CheckHit( const Point& rMousePos ) const
        {
            // check if the point hit our line
            return std::any_of(m_vConnLine.begin(),
                                 m_vConnLine.end(),
                                 [&rMousePos]
                                 ( const std::unique_ptr<OConnectionLine> & pLine )
                                 { return pLine->CheckHit( rMousePos ); } );
        }

        void OTableConnection::InvalidateConnection()
        {
            tools::Rectangle rcBounding = GetBoundingRect();
            rcBounding.AdjustBottom(1 );
            rcBounding.AdjustRight(1 );
            // I believe Invalidate and Draw(Rectangle) do not behave consistent: in any case it
            // could explain, why without the fake here when deleting a connection a dash remains at the lower end:
            // Invalidate records obviously one pixel line less as Draw.
            // Or everything works differently .....  in any case it works ....
            m_pParent->Invalidate( rcBounding, InvalidateFlags::NoChildren );
        }

        tools::Rectangle OTableConnection::GetBoundingRect() const
        {
            // determine all lines of the surrounding rectangle
            tools::Rectangle aBoundingRect( Point(0,0), Point(0,0) );
            tools::Rectangle aTempRect;
            for (auto const& elem : m_vConnLine)
            {
                aTempRect = elem->GetBoundingRect();

                // is the BoundingRect of this line valid?
                if( (aTempRect.GetWidth()!=1) && (aTempRect.GetHeight()!=1) )
                {
                    if( (aBoundingRect.GetWidth()==1) && (aBoundingRect.GetHeight()==1) )
                        aBoundingRect = aTempRect;
                    else
                        aBoundingRect.Union( aTempRect );
                }
            }

            return aBoundingRect;
        }

        void OTableConnection::Draw(vcl::RenderContext& rRenderContext, const tools::Rectangle& /*rRect*/)
        {
            // Draw line
            for( const auto& pLine : m_vConnLine )
                 pLine->Draw( &rRenderContext );
        }
    }

    /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

↑ V1023 A pointer without owner is added to the 'm_vConnLine' container by the 'emplace_back' method. A memory leak will occur in case of an exception.

↑ V1023 A pointer without owner is added to the 'm_vConnLine' container by the 'emplace_back' method. A memory leak will occur in case of an exception.