Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 798 insertions, 0 deletions

diff --git a/vcl/source/control/roadmapwizard.cxx b/vcl/source/control/roadmapwizard.cxx
new file mode 100644
index 000000000..b1738d5be
--- /dev/null
+++ b/vcl/source/control/roadmapwizard.cxx
@@ -0,0 +1,798 @@
+/* -*- 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 <vcl/toolkit/roadmap.hxx>
+#include <tools/debug.hxx>
+#include <osl/diagnose.h>
+
+#include <strings.hrc>
+#include <svdata.hxx>
+#include <wizdlg.hxx>
+
+#include <vector>
+#include <map>
+#include <set>
+
+#include "wizimpldata.hxx"
+#include <uiobject-internal.hxx>
+
+namespace vcl
+{
+    using namespace RoadmapWizardTypes;
+
+    namespace
+    {
+        typedef ::std::set< WizardTypes::WizardState > StateSet;
+
+        typedef ::std::map<
+                    PathId,
+                    WizardPath
+                > Paths;
+
+        typedef ::std::map<
+                    WizardTypes::WizardState,
+                    ::std::pair<
+                        OUString,
+                        RoadmapPageFactory
+                    >
+                > StateDescriptions;
+    }
+
+    struct RoadmapWizardImpl
+    {
+        ScopedVclPtr<ORoadmap> pRoadmap;
+        Paths               aPaths;
+        PathId              nActivePath;
+        StateDescriptions   aStateDescriptors;
+        StateSet            aDisabledStates;
+        bool                bActivePathIsDefinite;
+
+        RoadmapWizardImpl()
+            :pRoadmap( nullptr )
+            ,nActivePath( -1 )
+            ,bActivePathIsDefinite( false )
+        {
+        }
+
+        /// returns the index of the current state in given path, or -1
+        static sal_Int32 getStateIndexInPath( WizardTypes::WizardState _nState, const WizardPath& _rPath );
+        /// returns the index of the current state in the path with the given id, or -1
+        sal_Int32 getStateIndexInPath( WizardTypes::WizardState _nState, PathId _nPathId );
+        /// returns the index of the first state in which the two given paths differ
+        static sal_Int32 getFirstDifferentIndex( const WizardPath& _rLHS, const WizardPath& _rRHS );
+    };
+
+
+    sal_Int32 RoadmapWizardImpl::getStateIndexInPath( WizardTypes::WizardState _nState, const WizardPath& _rPath )
+    {
+        sal_Int32 nStateIndexInPath = 0;
+        bool bFound = false;
+        for (auto const& path : _rPath)
+        {
+            if (path == _nState)
+            {
+                bFound = true;
+                break;
+            }
+            ++nStateIndexInPath;
+        }
+        if (!bFound)
+            nStateIndexInPath = -1;
+        return nStateIndexInPath;
+    }
+
+
+    sal_Int32 RoadmapWizardImpl::getStateIndexInPath( WizardTypes::WizardState _nState, PathId _nPathId )
+    {
+        sal_Int32 nStateIndexInPath = -1;
+        Paths::const_iterator aPathPos = aPaths.find( _nPathId );
+        if ( aPathPos != aPaths.end( ) )
+            nStateIndexInPath = getStateIndexInPath( _nState, aPathPos->second );
+        return nStateIndexInPath;
+    }
+
+
+    sal_Int32 RoadmapWizardImpl::getFirstDifferentIndex( const WizardPath& _rLHS, const WizardPath& _rRHS )
+    {
+        sal_Int32 nMinLength = ::std::min( _rLHS.size(), _rRHS.size() );
+        for ( sal_Int32 nCheck = 0; nCheck < nMinLength; ++nCheck )
+        {
+            if ( _rLHS[ nCheck ] != _rRHS[ nCheck ] )
+                return nCheck;
+        }
+        return nMinLength;
+    }
+
+    //= RoadmapWizard
+    RoadmapWizard::RoadmapWizard(vcl::Window* pParent, WinBits nStyle, InitFlag eFlag)
+        : Dialog(pParent, nStyle, eFlag)
+        , maWizardLayoutIdle("vcl RoadmapWizard maWizardLayoutIdle")
+        , m_pFinish(nullptr)
+        , m_pCancel(nullptr)
+        , m_pNextPage(nullptr)
+        , m_pPrevPage(nullptr)
+        , m_pHelp(nullptr)
+        , m_xWizardImpl(new WizardMachineImplData)
+        , m_xRoadmapImpl(new RoadmapWizardImpl)
+    {
+        mpFirstPage     = nullptr;
+        mpFirstBtn      = nullptr;
+        mpCurTabPage    = nullptr;
+        mpPrevBtn       = nullptr;
+        mpNextBtn       = nullptr;
+        mpViewWindow    = nullptr;
+        mnCurLevel      = 0;
+        mbEmptyViewMargin =  false;
+        mnLeftAlignCount = 0;
+
+        maWizardLayoutIdle.SetPriority(TaskPriority::RESIZE);
+        maWizardLayoutIdle.SetInvokeHandler( LINK( this, RoadmapWizard, ImplHandleWizardLayoutTimerHdl ) );
+
+        implConstruct(WizardButtonFlags::NEXT | WizardButtonFlags::PREVIOUS | WizardButtonFlags::FINISH | WizardButtonFlags::CANCEL | WizardButtonFlags::HELP);
+
+        SetLeftAlignedButtonCount( 1 );
+        mbEmptyViewMargin = true;
+
+        m_xRoadmapImpl->pRoadmap.disposeAndReset( VclPtr<ORoadmap>::Create( this, WB_TABSTOP ) );
+        m_xRoadmapImpl->pRoadmap->SetText( VclResId( STR_WIZDLG_ROADMAP_TITLE ) );
+        m_xRoadmapImpl->pRoadmap->SetPosPixel( Point( 0, 0 ) );
+        m_xRoadmapImpl->pRoadmap->SetItemSelectHdl( LINK( this, RoadmapWizard, OnRoadmapItemSelected ) );
+
+        Size aRoadmapSize = LogicToPixel(Size(85, 0), MapMode(MapUnit::MapAppFont));
+        aRoadmapSize.setHeight( GetSizePixel().Height() );
+        m_xRoadmapImpl->pRoadmap->SetSizePixel( aRoadmapSize );
+
+        mpViewWindow = m_xRoadmapImpl->pRoadmap;
+        m_xRoadmapImpl->pRoadmap->Show();
+    }
+
+    RoadmapWizardMachine::RoadmapWizardMachine(weld::Window* pParent)
+        : WizardMachine(pParent, WizardButtonFlags::NEXT | WizardButtonFlags::PREVIOUS | WizardButtonFlags::FINISH | WizardButtonFlags::CANCEL | WizardButtonFlags::HELP)
+        , m_pImpl( new RoadmapWizardImpl )
+    {
+        m_xAssistant->connect_jump_page(LINK(this, RoadmapWizardMachine, OnRoadmapItemSelected));
+    }
+
+    void RoadmapWizard::ShowRoadmap(bool bShow)
+    {
+        m_xRoadmapImpl->pRoadmap->Show(bShow);
+        CalcAndSetSize();
+    }
+
+    RoadmapWizard::~RoadmapWizard()
+    {
+        disposeOnce();
+    }
+
+    RoadmapWizardMachine::~RoadmapWizardMachine()
+    {
+    }
+
+    void RoadmapWizard::dispose()
+    {
+        m_xRoadmapImpl.reset();
+
+        m_pFinish.disposeAndClear();
+        m_pCancel.disposeAndClear();
+        m_pNextPage.disposeAndClear();
+        m_pPrevPage.disposeAndClear();
+        m_pHelp.disposeAndClear();
+
+        if (m_xWizardImpl)
+        {
+            for (WizardTypes::WizardState i = 0; i < m_xWizardImpl->nFirstUnknownPage; ++i)
+            {
+                TabPage *pPage = GetPage(i);
+                if (pPage)
+                    pPage->disposeOnce();
+            }
+            m_xWizardImpl.reset();
+        }
+
+        maWizardLayoutIdle.Stop();
+
+        // Remove all buttons
+        while ( mpFirstBtn )
+            RemoveButton( mpFirstBtn->mpButton );
+
+        // Remove all pages
+        while ( mpFirstPage )
+            RemovePage( mpFirstPage->mpPage );
+
+        mpCurTabPage.clear();
+        mpPrevBtn.clear();
+        mpNextBtn.clear();
+        mpViewWindow.clear();
+        Dialog::dispose();
+    }
+
+    void RoadmapWizard::SetRoadmapHelpId( const OString& _rId )
+    {
+        m_xRoadmapImpl->pRoadmap->SetHelpId( _rId );
+    }
+
+    void RoadmapWizardMachine::SetRoadmapHelpId(const OString& rId)
+    {
+        m_xAssistant->set_page_side_help_id(rId);
+    }
+
+    void RoadmapWizardMachine::declarePath( PathId _nPathId, const WizardPath& _lWizardStates)
+    {
+        m_pImpl->aPaths.emplace( _nPathId, _lWizardStates );
+
+        if ( m_pImpl->aPaths.size() == 1 )
+            // the very first path -> activate it
+            activatePath( _nPathId );
+        else
+            implUpdateRoadmap( );
+    }
+
+    void RoadmapWizardMachine::activatePath( PathId _nPathId, bool _bDecideForIt )
+    {
+        if ( ( _nPathId == m_pImpl->nActivePath ) && ( _bDecideForIt == m_pImpl->bActivePathIsDefinite ) )
+            // nothing to do
+            return;
+
+        // does the given path exist?
+        Paths::const_iterator aNewPathPos = m_pImpl->aPaths.find( _nPathId );
+        DBG_ASSERT( aNewPathPos != m_pImpl->aPaths.end(), "RoadmapWizard::activate: there is no such path!" );
+        if ( aNewPathPos == m_pImpl->aPaths.end() )
+            return;
+
+        // determine the index of the current state in the current path
+        sal_Int32 nCurrentStatePathIndex = -1;
+        if ( m_pImpl->nActivePath != -1 )
+            nCurrentStatePathIndex = m_pImpl->getStateIndexInPath( getCurrentState(), m_pImpl->nActivePath );
+
+        DBG_ASSERT( static_cast<sal_Int32>(aNewPathPos->second.size()) > nCurrentStatePathIndex,
+            "RoadmapWizard::activate: you cannot activate a path which has less states than we've already advanced!" );
+            // If this asserts, this for instance means that we are already in state number, say, 5
+            // of our current path, and the caller tries to activate a path which has less than 5
+            // states
+        if ( static_cast<sal_Int32>(aNewPathPos->second.size()) <= nCurrentStatePathIndex )
+            return;
+
+        // assert that the current and the new path are equal, up to nCurrentStatePathIndex
+        Paths::const_iterator aActivePathPos = m_pImpl->aPaths.find( m_pImpl->nActivePath );
+        if ( aActivePathPos != m_pImpl->aPaths.end() )
+        {
+            if ( RoadmapWizardImpl::getFirstDifferentIndex( aActivePathPos->second, aNewPathPos->second ) <= nCurrentStatePathIndex )
+            {
+                OSL_FAIL( "RoadmapWizard::activate: you cannot activate a path which conflicts with the current one *before* the current state!" );
+                return;
+            }
+        }
+
+        m_pImpl->nActivePath = _nPathId;
+        m_pImpl->bActivePathIsDefinite = _bDecideForIt;
+
+        implUpdateRoadmap( );
+    }
+
+    void RoadmapWizard::implUpdateRoadmap( )
+    {
+        DBG_ASSERT( m_xRoadmapImpl->aPaths.find( m_xRoadmapImpl->nActivePath ) != m_xRoadmapImpl->aPaths.end(),
+            "RoadmapWizard::implUpdateRoadmap: there is no such path!" );
+        const WizardPath& rActivePath( m_xRoadmapImpl->aPaths[ m_xRoadmapImpl->nActivePath ] );
+
+        sal_Int32 nCurrentStatePathIndex = RoadmapWizardImpl::getStateIndexInPath( getCurrentState(), rActivePath );
+        if (nCurrentStatePathIndex < 0)
+            return;
+
+        // determine up to which index (in the new path) we have to display the items
+        RoadmapTypes::ItemIndex nUpperStepBoundary = static_cast<RoadmapTypes::ItemIndex>(rActivePath.size());
+        bool bIncompletePath = false;
+        if ( !m_xRoadmapImpl->bActivePathIsDefinite )
+        {
+            for (auto const& path : m_xRoadmapImpl->aPaths)
+            {
+                if ( path.first == m_xRoadmapImpl->nActivePath )
+                    // it's the path we are just activating -> no need to check anything
+                    continue;
+                // the index from which on both paths differ
+                sal_Int32 nDivergenceIndex = RoadmapWizardImpl::getFirstDifferentIndex( rActivePath, path.second );
+                if ( nDivergenceIndex <= nCurrentStatePathIndex )
+                    // they differ in an index which we have already left behind us
+                    // -> this is no conflict anymore
+                    continue;
+
+                // the path conflicts with our new path -> don't activate the
+                // *complete* new path, but only up to the step which is unambiguous
+                nUpperStepBoundary = nDivergenceIndex;
+                bIncompletePath = true;
+            }
+        }
+
+        // now, we have to remove all items after nCurrentStatePathIndex, and insert the items from the active
+        // path, up to (excluding) nUpperStepBoundary
+        RoadmapTypes::ItemIndex nLoopUntil = ::std::max( nUpperStepBoundary, m_xRoadmapImpl->pRoadmap->GetItemCount() );
+        for ( RoadmapTypes::ItemIndex nItemIndex = nCurrentStatePathIndex; nItemIndex < nLoopUntil; ++nItemIndex )
+        {
+            bool bExistentItem = ( nItemIndex < m_xRoadmapImpl->pRoadmap->GetItemCount() );
+            bool bNeedItem = ( nItemIndex < nUpperStepBoundary );
+
+            bool bInsertItem = false;
+            if ( bExistentItem )
+            {
+                if ( !bNeedItem )
+                {
+                    while ( nItemIndex < m_xRoadmapImpl->pRoadmap->GetItemCount() )
+                        m_xRoadmapImpl->pRoadmap->DeleteRoadmapItem( nItemIndex );
+                    break;
+                }
+                else
+                {
+                    // there is an item with this index in the roadmap - does it match what is requested by
+                    // the respective state in the active path?
+                    RoadmapTypes::ItemId nPresentItemId = m_xRoadmapImpl->pRoadmap->GetItemID( nItemIndex );
+                    WizardTypes::WizardState nRequiredState = rActivePath[ nItemIndex ];
+                    if ( nPresentItemId != nRequiredState )
+                    {
+                        m_xRoadmapImpl->pRoadmap->DeleteRoadmapItem( nItemIndex );
+                        bInsertItem = true;
+                    }
+                }
+            }
+            else
+            {
+                DBG_ASSERT( bNeedItem, "RoadmapWizard::implUpdateRoadmap: ehm - none needed, none present - why did the loop not terminate?" );
+                bInsertItem = bNeedItem;
+            }
+
+            WizardTypes::WizardState nState( rActivePath[ nItemIndex ] );
+            if ( bInsertItem )
+            {
+                m_xRoadmapImpl->pRoadmap->InsertRoadmapItem(
+                    nItemIndex,
+                    getStateDisplayName( nState ),
+                    nState,
+                    true
+                );
+            }
+
+            const bool bEnable = m_xRoadmapImpl->aDisabledStates.find( nState ) == m_xRoadmapImpl->aDisabledStates.end();
+            m_xRoadmapImpl->pRoadmap->EnableRoadmapItem( m_xRoadmapImpl->pRoadmap->GetItemID( nItemIndex ), bEnable );
+        }
+
+        m_xRoadmapImpl->pRoadmap->SetRoadmapComplete( !bIncompletePath );
+    }
+
+    void RoadmapWizardMachine::implUpdateRoadmap( )
+    {
+
+        DBG_ASSERT( m_pImpl->aPaths.find( m_pImpl->nActivePath ) != m_pImpl->aPaths.end(),
+            "RoadmapWizard::implUpdateRoadmap: there is no such path!" );
+        const WizardPath& rActivePath( m_pImpl->aPaths[ m_pImpl->nActivePath ] );
+
+        sal_Int32 nCurrentStatePathIndex = RoadmapWizardImpl::getStateIndexInPath( getCurrentState(), rActivePath );
+        if (nCurrentStatePathIndex < 0)
+            return;
+
+        // determine up to which index (in the new path) we have to display the items
+        RoadmapTypes::ItemIndex nUpperStepBoundary = static_cast<RoadmapTypes::ItemIndex>(rActivePath.size());
+        if ( !m_pImpl->bActivePathIsDefinite )
+        {
+            for (auto const& path : m_pImpl->aPaths)
+            {
+                if ( path.first == m_pImpl->nActivePath )
+                    // it's the path we are just activating -> no need to check anything
+                    continue;
+                // the index from which on both paths differ
+                sal_Int32 nDivergenceIndex = RoadmapWizardImpl::getFirstDifferentIndex( rActivePath, path.second );
+                if ( nDivergenceIndex <= nCurrentStatePathIndex )
+                    // they differ in an index which we have already left behind us
+                    // -> this is no conflict anymore
+                    continue;
+
+                // the path conflicts with our new path -> don't activate the
+                // *complete* new path, but only up to the step which is unambiguous
+                nUpperStepBoundary = nDivergenceIndex;
+            }
+        }
+
+        // can we advance from the current page?
+        bool bCurrentPageCanAdvance = true;
+        BuilderPage* pCurrentPage = GetPage( getCurrentState() );
+        if ( pCurrentPage )
+        {
+            const IWizardPageController* pController = getPageController( GetPage( getCurrentState() ) );
+            OSL_ENSURE( pController != nullptr, "RoadmapWizard::implUpdateRoadmap: no controller for the current page!" );
+            bCurrentPageCanAdvance = !pController || pController->canAdvance();
+        }
+
+        // now, we have to remove all items after nCurrentStatePathIndex, and insert the items from the active
+        // path, up to (excluding) nUpperStepBoundary
+        RoadmapTypes::ItemIndex nRoadmapItems = m_xAssistant->get_n_pages();
+        RoadmapTypes::ItemIndex nLoopUntil = ::std::max( nUpperStepBoundary, nRoadmapItems );
+        for ( RoadmapTypes::ItemIndex nItemIndex = nCurrentStatePathIndex; nItemIndex < nLoopUntil; ++nItemIndex )
+        {
+            bool bExistentItem = ( nItemIndex < nRoadmapItems );
+            bool bNeedItem = ( nItemIndex < nUpperStepBoundary );
+
+            bool bInsertItem = false;
+            if ( bExistentItem )
+            {
+                if ( !bNeedItem )
+                {
+                    int nPages = nRoadmapItems;
+                    for (int i = nPages - 1; i >= nItemIndex; --i)
+                    {
+                        m_xAssistant->set_page_title(m_xAssistant->get_page_ident(i), "");
+                        --nRoadmapItems;
+                    }
+                    break;
+                }
+                else
+                {
+                    // there is an item with this index in the roadmap - does it match what is requested by
+                    // the respective state in the active path?
+                    RoadmapTypes::ItemId nPresentItemId = m_xAssistant->get_page_ident(nItemIndex).toInt32();
+                    WizardTypes::WizardState nRequiredState = rActivePath[ nItemIndex ];
+                    if ( nPresentItemId != nRequiredState )
+                    {
+                        m_xAssistant->set_page_title(OString::number(nPresentItemId), "");
+                        bInsertItem = true;
+                    }
+                }
+            }
+            else
+            {
+                DBG_ASSERT( bNeedItem, "RoadmapWizard::implUpdateRoadmap: ehm - none needed, none present - why did the loop not terminate?" );
+                bInsertItem = bNeedItem;
+            }
+
+            WizardTypes::WizardState nState( rActivePath[ nItemIndex ] );
+
+            if ( bInsertItem )
+            {
+                GetOrCreatePage(nState);
+            }
+
+            OString sIdent(OString::number(nState));
+            m_xAssistant->set_page_index(sIdent, nItemIndex);
+            m_xAssistant->set_page_title(sIdent, getStateDisplayName(nState));
+
+            // if the item is *after* the current state, but the current page does not
+            // allow advancing, the disable the state. This relieves derived classes
+            // from disabling all future states just because the current state does not
+            // (yet) allow advancing.
+            const bool bUnconditionedDisable = !bCurrentPageCanAdvance && ( nItemIndex > nCurrentStatePathIndex );
+            const bool bEnable = !bUnconditionedDisable && ( m_pImpl->aDisabledStates.find( nState ) == m_pImpl->aDisabledStates.end() );
+            m_xAssistant->set_page_sensitive(sIdent, bEnable);
+        }
+    }
+
+    WizardTypes::WizardState RoadmapWizard::determineNextState( WizardTypes::WizardState _nCurrentState ) const
+    {
+        sal_Int32 nCurrentStatePathIndex = -1;
+
+        Paths::const_iterator aActivePathPos = m_xRoadmapImpl->aPaths.find( m_xRoadmapImpl->nActivePath );
+        if ( aActivePathPos != m_xRoadmapImpl->aPaths.end() )
+            nCurrentStatePathIndex = RoadmapWizardImpl::getStateIndexInPath( _nCurrentState, aActivePathPos->second );
+
+        DBG_ASSERT( nCurrentStatePathIndex != -1, "RoadmapWizard::determineNextState: ehm - how can we travel if there is no (valid) active path?" );
+        if ( nCurrentStatePathIndex == -1 )
+            return WZS_INVALID_STATE;
+
+        sal_Int32 nNextStateIndex = nCurrentStatePathIndex + 1;
+
+        while   (   ( nNextStateIndex < static_cast<sal_Int32>(aActivePathPos->second.size()) )
+                &&  ( m_xRoadmapImpl->aDisabledStates.find( aActivePathPos->second[ nNextStateIndex ] ) != m_xRoadmapImpl->aDisabledStates.end() )
+                )
+        {
+            ++nNextStateIndex;
+        }
+
+        if ( nNextStateIndex >= static_cast<sal_Int32>(aActivePathPos->second.size()) )
+            // there is no next state in the current path (at least none which is enabled)
+            return WZS_INVALID_STATE;
+
+        return aActivePathPos->second[ nNextStateIndex ];
+    }
+
+    WizardTypes::WizardState RoadmapWizardMachine::determineNextState( WizardTypes::WizardState _nCurrentState ) const
+    {
+        sal_Int32 nCurrentStatePathIndex = -1;
+
+        Paths::const_iterator aActivePathPos = m_pImpl->aPaths.find( m_pImpl->nActivePath );
+        if ( aActivePathPos != m_pImpl->aPaths.end() )
+            nCurrentStatePathIndex = RoadmapWizardImpl::getStateIndexInPath( _nCurrentState, aActivePathPos->second );
+
+        DBG_ASSERT( nCurrentStatePathIndex != -1, "RoadmapWizard::determineNextState: ehm - how can we travel if there is no (valid) active path?" );
+        if ( nCurrentStatePathIndex == -1 )
+            return WZS_INVALID_STATE;
+
+        sal_Int32 nNextStateIndex = nCurrentStatePathIndex + 1;
+
+        while   (   ( nNextStateIndex < static_cast<sal_Int32>(aActivePathPos->second.size()) )
+                &&  ( m_pImpl->aDisabledStates.find( aActivePathPos->second[ nNextStateIndex ] ) != m_pImpl->aDisabledStates.end() )
+                )
+        {
+            ++nNextStateIndex;
+        }
+
+        if ( nNextStateIndex >= static_cast<sal_Int32>(aActivePathPos->second.size()) )
+            // there is no next state in the current path (at least none which is enabled)
+            return WZS_INVALID_STATE;
+
+        return aActivePathPos->second[ nNextStateIndex ];
+    }
+
+    bool RoadmapWizardMachine::canAdvance() const
+    {
+        if ( !m_pImpl->bActivePathIsDefinite )
+        {
+            // check how many paths are still allowed
+            const WizardPath& rActivePath( m_pImpl->aPaths[ m_pImpl->nActivePath ] );
+
+            // if current path has only the base item, it is not possible to proceed without activating another path
+            if(rActivePath.size()<=1)
+                return false;
+
+            sal_Int32 nCurrentStatePathIndex = RoadmapWizardImpl::getStateIndexInPath( getCurrentState(), rActivePath );
+
+            size_t nPossiblePaths(0);
+            for (auto const& path : m_pImpl->aPaths)
+            {
+                // the index from which on both paths differ
+                sal_Int32 nDivergenceIndex = RoadmapWizardImpl::getFirstDifferentIndex( rActivePath, path.second );
+
+                if ( nDivergenceIndex > nCurrentStatePathIndex )
+                    // this path is still a possible path
+                    nPossiblePaths += 1;
+            }
+
+            // if we have more than one path which is still possible, then we assume
+            // to always have a next state. Though there might be scenarios where this
+            // is not true, but this is too sophisticated (means not really needed) right now.
+            if ( nPossiblePaths > 1 )
+                return true;
+        }
+
+        const WizardPath& rPath = m_pImpl->aPaths[ m_pImpl->nActivePath ];
+        return *rPath.rbegin() != getCurrentState();
+    }
+
+    void RoadmapWizardMachine::updateTravelUI()
+    {
+        WizardMachine::updateTravelUI();
+
+        // disable the "Previous" button if all states in our history are disabled
+        std::vector< WizardTypes::WizardState > aHistory;
+        getStateHistory( aHistory );
+        bool bHaveEnabledState = false;
+        for (auto const& state : aHistory)
+        {
+            if ( isStateEnabled(state) )
+            {
+                bHaveEnabledState = true;
+                break;
+            }
+        }
+
+        enableButtons( WizardButtonFlags::PREVIOUS, bHaveEnabledState );
+
+        implUpdateRoadmap();
+    }
+
+    IMPL_LINK_NOARG(RoadmapWizard, OnRoadmapItemSelected, LinkParamNone*, void)
+    {
+        RoadmapTypes::ItemId nCurItemId = m_xRoadmapImpl->pRoadmap->GetCurrentRoadmapItemID();
+        if ( nCurItemId == getCurrentState() )
+            // nothing to do
+            return;
+
+        if ( isTravelingSuspended() )
+            return;
+
+        RoadmapWizardTravelSuspension aTravelGuard( *this );
+
+        sal_Int32 nCurrentIndex = m_xRoadmapImpl->getStateIndexInPath( getCurrentState(), m_xRoadmapImpl->nActivePath );
+        sal_Int32 nNewIndex     = m_xRoadmapImpl->getStateIndexInPath( nCurItemId, m_xRoadmapImpl->nActivePath );
+
+        DBG_ASSERT( ( nCurrentIndex != -1 ) && ( nNewIndex != -1 ),
+            "RoadmapWizard::OnRoadmapItemSelected: something's wrong here!" );
+        if ( ( nCurrentIndex == -1 ) || ( nNewIndex == -1 ) )
+        {
+            return;
+        }
+
+        bool bResult = true;
+        if ( nNewIndex > nCurrentIndex )
+        {
+            bResult = skipUntil( static_cast<WizardTypes::WizardState>(nCurItemId) );
+            WizardTypes::WizardState nTemp = static_cast<WizardTypes::WizardState>(nCurItemId);
+            while( nTemp )
+            {
+                if( m_xRoadmapImpl->aDisabledStates.find( --nTemp ) != m_xRoadmapImpl->aDisabledStates.end() )
+                    removePageFromHistory( nTemp );
+            }
+        }
+        else
+            bResult = skipBackwardUntil( static_cast<WizardTypes::WizardState>(nCurItemId) );
+
+        if ( !bResult )
+            m_xRoadmapImpl->pRoadmap->SelectRoadmapItemByID( getCurrentState() );
+    }
+
+    IMPL_LINK(RoadmapWizardMachine, OnRoadmapItemSelected, const OString&, rCurItemId, bool)
+    {
+        int nCurItemId = rCurItemId.toInt32();
+
+        if ( nCurItemId == getCurrentState() )
+            // nothing to do
+            return false;
+
+        if ( isTravelingSuspended() )
+            return false;
+
+        WizardTravelSuspension aTravelGuard( *this );
+
+        sal_Int32 nCurrentIndex = m_pImpl->getStateIndexInPath( getCurrentState(), m_pImpl->nActivePath );
+        sal_Int32 nNewIndex     = m_pImpl->getStateIndexInPath( nCurItemId, m_pImpl->nActivePath );
+
+        DBG_ASSERT( ( nCurrentIndex != -1 ) && ( nNewIndex != -1 ),
+            "RoadmapWizard::OnRoadmapItemSelected: something's wrong here!" );
+        if ( ( nCurrentIndex == -1 ) || ( nNewIndex == -1 ) )
+        {
+            return false;
+        }
+
+        bool bResult = true;
+        if ( nNewIndex > nCurrentIndex )
+        {
+            bResult = skipUntil( static_cast<WizardTypes::WizardState>(nCurItemId) );
+            WizardTypes::WizardState nTemp = static_cast<WizardTypes::WizardState>(nCurItemId);
+            while( nTemp )
+            {
+                if( m_pImpl->aDisabledStates.find( --nTemp ) != m_pImpl->aDisabledStates.end() )
+                    removePageFromHistory( nTemp );
+            }
+        }
+        else
+            bResult = skipBackwardUntil( static_cast<WizardTypes::WizardState>(nCurItemId) );
+
+        return bResult;
+    }
+
+    void RoadmapWizard::enterState(WizardTypes::WizardState /*nState*/)
+    {
+        // synchronize the roadmap
+        implUpdateRoadmap( );
+        m_xRoadmapImpl->pRoadmap->SelectRoadmapItemByID( getCurrentState() );
+    }
+
+    void RoadmapWizardMachine::enterState( WizardTypes::WizardState _nState )
+    {
+        WizardMachine::enterState( _nState );
+
+        // synchronize the roadmap
+        implUpdateRoadmap();
+    }
+
+    OUString RoadmapWizard::getStateDisplayName( WizardTypes::WizardState _nState ) const
+    {
+        OUString sDisplayName;
+
+        StateDescriptions::const_iterator pos = m_xRoadmapImpl->aStateDescriptors.find( _nState );
+        OSL_ENSURE( pos != m_xRoadmapImpl->aStateDescriptors.end(),
+            "RoadmapWizard::getStateDisplayName: no default implementation available for this state!" );
+        if ( pos != m_xRoadmapImpl->aStateDescriptors.end() )
+            sDisplayName = pos->second.first;
+
+        return sDisplayName;
+    }
+
+    OUString RoadmapWizardMachine::getStateDisplayName( WizardTypes::WizardState _nState ) const
+    {
+        OUString sDisplayName;
+
+        StateDescriptions::const_iterator pos = m_pImpl->aStateDescriptors.find( _nState );
+        OSL_ENSURE( pos != m_pImpl->aStateDescriptors.end(),
+            "RoadmapWizard::getStateDisplayName: no default implementation available for this state!" );
+        if ( pos != m_pImpl->aStateDescriptors.end() )
+            sDisplayName = pos->second.first;
+
+        return sDisplayName;
+    }
+
+    VclPtr<TabPage> RoadmapWizard::createPage( WizardTypes::WizardState _nState )
+    {
+        VclPtr<TabPage> pPage;
+
+        StateDescriptions::const_iterator pos = m_xRoadmapImpl->aStateDescriptors.find( _nState );
+        OSL_ENSURE( pos != m_xRoadmapImpl->aStateDescriptors.end(),
+            "RoadmapWizard::createPage: no default implementation available for this state!" );
+        if ( pos != m_xRoadmapImpl->aStateDescriptors.end() )
+        {
+            RoadmapPageFactory pFactory = pos->second.second;
+            pPage = (*pFactory)( *this );
+        }
+
+        return pPage;
+    }
+
+    void RoadmapWizardMachine::enableState( WizardTypes::WizardState _nState, bool _bEnable )
+    {
+        // remember this (in case the state appears in the roadmap later on)
+        if ( _bEnable )
+            m_pImpl->aDisabledStates.erase( _nState );
+        else
+        {
+            m_pImpl->aDisabledStates.insert( _nState );
+            removePageFromHistory( _nState );
+        }
+
+        // if the state is currently in the roadmap, reflect it's new status
+        m_xAssistant->set_page_sensitive(OString::number(_nState), _bEnable);
+    }
+
+    bool RoadmapWizardMachine::knowsState( WizardTypes::WizardState i_nState ) const
+    {
+        for (auto const& path : m_pImpl->aPaths)
+        {
+            for (auto const& state : path.second)
+            {
+                if ( state == i_nState )
+                    return true;
+            }
+        }
+        return false;
+    }
+
+    bool RoadmapWizardMachine::isStateEnabled( WizardTypes::WizardState _nState ) const
+    {
+        return m_pImpl->aDisabledStates.find( _nState ) == m_pImpl->aDisabledStates.end();
+    }
+
+    void RoadmapWizard::InsertRoadmapItem(int nItemIndex, const OUString& rText, int nItemId, bool bEnable)
+    {
+        m_xRoadmapImpl->pRoadmap->InsertRoadmapItem(nItemIndex, rText, nItemId, bEnable);
+    }
+
+    void RoadmapWizard::SelectRoadmapItemByID(int nItemId, bool bGrabFocus)
+    {
+        m_xRoadmapImpl->pRoadmap->SelectRoadmapItemByID(nItemId, bGrabFocus);
+    }
+
+    void RoadmapWizard::DeleteRoadmapItems()
+    {
+        while (m_xRoadmapImpl->pRoadmap->GetItemCount())
+            m_xRoadmapImpl->pRoadmap->DeleteRoadmapItem(0);
+    }
+
+    void RoadmapWizard::SetItemSelectHdl( const Link<LinkParamNone*,void>& _rHdl )
+    {
+        m_xRoadmapImpl->pRoadmap->SetItemSelectHdl(_rHdl);
+    }
+
+    int RoadmapWizard::GetCurrentRoadmapItemID() const
+    {
+        return m_xRoadmapImpl->pRoadmap->GetCurrentRoadmapItemID();
+    }
+
+    FactoryFunction RoadmapWizard::GetUITestFactory() const
+    {
+        return RoadmapWizardUIObject::create;
+    }
+
+}   // namespace vcl
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */