bool PCB_EDIT_FRAME::RemoveMisConnectedTracks()
{
     /* finds all track segments which are mis-connected (to more than one net).
     * When such a bad segment is found, it is flagged to be removed.
     * All tracks having at least one flagged segment are removed.
     */
    TRACK*          segment;
    TRACK*          other;
    TRACK*          next;
    int             net_code_s, net_code_e;
    bool            isModified = false;

    for( segment = GetBoard()->m_Track;  segment;  segment = (TRACK*) segment->Next() )
    {
        segment->SetState( FLAG0, false );

        // find the netcode for segment using anything connected to the "start" of "segment"
        net_code_s = -1;

        if( segment->start && segment->start->Type()==PCB_PAD_T )
        {
            // get the netcode of the pad to propagate.
            net_code_s = ((D_PAD*)(segment->start))->GetNet();
        }
        else
        {
            other = segment->GetTrace( GetBoard()->m_Track, NULL, FLG_START );

            if( other )
                net_code_s = other->GetNet();
        }

        if( net_code_s < 0 )
            continue;           // the "start" of segment is not connected

        // find the netcode for segment using anything connected to the "end" of "segment"
        net_code_e = -1;

        if( segment->end && segment->end->Type()==PCB_PAD_T )
        {
            net_code_e = ((D_PAD*)(segment->end))->GetNet();
        }
        else
        {
            other = segment->GetTrace( GetBoard()->m_Track, NULL, FLG_END );

            if( other )
                net_code_e = other->GetNet();
        }

        if( net_code_e < 0 )
            continue;           // the "end" of segment is not connected

        // Netcodes do not agree, so mark the segment as "to be removed"
        if( net_code_s != net_code_e )
        {
            segment->SetState( FLAG0, true );
        }
    }

    // Remove tracks having a flagged segment
    for( segment = GetBoard()->m_Track; segment; segment = next )
    {
        next = (TRACK*) segment->Next();

        if( segment->GetState( FLAG0 ) )    // Segment is flagged to be removed
        {
            segment->SetState( FLAG0, false );
            isModified = true;
            GetBoard()->m_Status_Pcb = 0;
            Remove_One_Track( NULL, segment );

            // the current segment is deleted,
            // we do not know the next "not yet tested" segment,
            // so restart to the beginning
            next = GetBoard()->m_Track;
        }
    }

    return isModified;
}

/**
 * Function Merge_SubNets_Connected_By_CopperAreas(BOARD* aPcb, int aNetcode)
 * Used after connections by tracks calculations
 * Merge subnets, in tracks ans pads when they are connected by a filled copper area
 * for pads, this is the .m_physical_connexion member which is tested and modified
 * for tracks, this is the .m_Subnet member which is tested and modified
 * these members are block numbers (or cluster numbers) for a given net,
 * calculated by Build_Pads_Info_Connections_By_Tracks()
 * The result is merging 2 blocks (or subnets)
 * @param aPcb = the current board
 * @param aNetcode = netcode to consider
 */
void Merge_SubNets_Connected_By_CopperAreas( BOARD* aPcb, int aNetcode )
{
    // Ensure a zone with the given netcode exists: examine all zones:
    bool found = false;

    for( int index = 0; index < aPcb->GetAreaCount(); index++ )
    {
        ZONE_CONTAINER* zone = aPcb->GetArea( index );

        if( aNetcode == zone->GetNetCode() )
        {
            found = true;
            break;
        }
    }

    if( !found )  // No zone with this netcode, therefore no connection by zone
        return;

    // list of pads and tracks candidates to test:
    // It is static to avoid multiple memory realloc.
    static std::vector <BOARD_CONNECTED_ITEM*> Candidates;
    Candidates.clear();

    // Build the list of pads candidates connected to the net:
    NETINFO_ITEM* net = aPcb->FindNet( aNetcode );
    wxASSERT( net );
    Candidates.reserve( net->m_PadInNetList.size() );
    for( unsigned ii = 0; ii < net->m_PadInNetList.size(); ii++ )
        Candidates.push_back( net->m_PadInNetList[ii] );

    // Build the list of track candidates connected to the net:
    TRACK* track;
    track = aPcb->m_Track.GetFirst()->GetStartNetCode( aNetcode );
    for( ; track; track = track->Next() )
    {
        if( track->GetNetCode() != aNetcode )
            break;
        Candidates.push_back( track );
    }

    if( Candidates.size() == 0 )
        return;

    int next_subnet_free_number = 0;
    for( unsigned ii = 0; ii < Candidates.size(); ii++ )
    {
        int subnet = Candidates[ii]->GetSubNet();
        next_subnet_free_number = std::max( next_subnet_free_number, subnet );
    }

    next_subnet_free_number++;     // This is a subnet we can use with not connected items
                                   // by tracks, but connected by zone.

    // Sort by zone_subnet:
    sort( Candidates.begin(), Candidates.end(), CmpZoneSubnetValue );

    // Some items can be not connected, but they can be connected to a filled area:
    // give them a subnet common to these items connected only by the area,
    // and not already used.
    // a value like next_subnet_free_number+zone_subnet is right
    for( unsigned jj = 0; jj < Candidates.size(); jj++ )
    {
        BOARD_CONNECTED_ITEM* item = Candidates[jj];
        if ( item->GetSubNet() == 0 && (item->GetZoneSubNet() > 0) )
        {
            item->SetSubNet( next_subnet_free_number + item->GetZoneSubNet() );
        }
    }

    // Now, for each zone subnet, we search for 2 items with different subnets.
    // if found, the 2 subnet are merged in the whole candidate list.
    int old_subnet      = 0;
    int old_zone_subnet = 0;
    for( unsigned ii = 0; ii < Candidates.size(); ii++ )
    {
        BOARD_CONNECTED_ITEM* item = Candidates[ii];
        int zone_subnet = item->GetZoneSubNet();

        if( zone_subnet == 0 )  // Not connected by a filled area, skip it
            continue;

        int subnet = item->GetSubNet();

        if( zone_subnet != old_zone_subnet )  // a new zone subnet is found
        {
            old_subnet = subnet;
            old_zone_subnet = zone_subnet;
//.........这里部分代码省略.........

bool DIALOG_TRACK_VIA_PROPERTIES::Apply()
{
    if( !check() )
        return false;

    for( int i = 0; i < m_items.Size(); ++i )
    {
        BOARD_ITEM* item = m_items.Item<BOARD_ITEM>( i );

        switch( item->Type() )
        {
            case PCB_TRACE_T:
            {
                assert( m_tracks );
                TRACK* t = static_cast<TRACK*>( item );

                if( m_trackStartX.Valid() || m_trackStartY.Valid() )
                {
                    wxPoint start = t->GetStart();

                    if( m_trackStartX.Valid() )
                        start.x = m_trackStartX.GetValue();

                    if( m_trackStartY.Valid() )
                        start.y = m_trackStartY.GetValue();

                    t->SetStart( start );
                }

                if( m_trackEndX.Valid() || m_trackEndY.Valid() )
                {
                    wxPoint end = t->GetEnd();

                    if( m_trackEndX.Valid() )
                        end.x = m_trackEndX.GetValue();

                    if( m_trackEndY.Valid() )
                        end.y = m_trackEndY.GetValue();

                    t->SetEnd( end );
                }

                if( m_trackNetclass->IsChecked() )
                {
                    t->SetWidth( t->GetNetClass()->GetTrackWidth() );
                }
                else if( m_trackWidth.Valid() )
                {
                    t->SetWidth( m_trackWidth.GetValue() );
                }

                LAYER_NUM layer = m_TrackLayerCtrl->GetLayerSelection();

                if( layer != UNDEFINED_LAYER )
                    t->SetLayer( (LAYER_ID) layer );

                break;
            }

            case PCB_VIA_T:
            {
                assert( m_vias );

                VIA* v = static_cast<VIA*>( item );

                if( m_viaX.Valid() || m_viaY.Valid() )
                {
                    wxPoint pos = v->GetPosition();

                    if( m_viaX.Valid() )
                        pos.x = m_viaX.GetValue();

                    if( m_viaY.Valid() )
                        pos.y = m_viaY.GetValue();

                    v->SetPosition( pos );
                }

                if( m_viaNetclass->IsChecked() )
                {
                    v->SetWidth( v->GetNetClass()->GetViaDiameter() );
                    v->SetDrill( v->GetNetClass()->GetViaDrill() );
                }
                else
                {
                    if( m_viaDiameter.Valid() )
                        v->SetWidth( m_viaDiameter.GetValue() );

                    if( m_viaDrill.Valid() )
                        v->SetDrill( m_viaDrill.GetValue() );
                }

                break;
            }

            default:
                assert( false );
                break;
        }
    }
//.........这里部分代码省略.........

void BOARD_ITEM::SwapData( BOARD_ITEM* aImage )
{
    if( aImage == NULL )
        return;

    // Remark: to create images of edited items to undo, we are using Clone method
    // which can duplication of items foe copy, but does not clone all members
    // mainly pointers in chain and time stamp, which is set to new, unique value.
    // So we have to use the current values of these parameters.

    EDA_ITEM * pnext = Next();
    EDA_ITEM * pback = Back();
    DHEAD* mylist    = m_List;
    time_t timestamp = GetTimeStamp();

    switch( Type() )
    {
    case PCB_MODULE_T:
    {
        MODULE* tmp = (MODULE*) aImage->Clone();
        ( (MODULE*) aImage )->Copy( (MODULE*) this );
        ( (MODULE*) this )->Copy( tmp );
        delete tmp;
    }
        break;

    case PCB_ZONE_AREA_T:
    {
        ZONE_CONTAINER* tmp = (ZONE_CONTAINER*) aImage->Clone();
        ( (ZONE_CONTAINER*) aImage )->Copy( (ZONE_CONTAINER*) this );
        ( (ZONE_CONTAINER*) this )->Copy( tmp );
        delete tmp;
    }
        break;

    case PCB_LINE_T:
        std::swap( *((DRAWSEGMENT*)this), *((DRAWSEGMENT*)aImage) );
        break;

    case PCB_TRACE_T:
    case PCB_VIA_T:
    {
        TRACK* track = (TRACK*) this;
        TRACK* image = (TRACK*) aImage;

        std::swap(track->m_Layer, image->m_Layer );

        // swap start, end, width and shape for track and image.
        wxPoint exchp = track->GetStart();
        track->SetStart( image->GetStart() );
        image->SetStart( exchp );
        exchp = track->GetEnd();
        track->SetEnd( image->GetEnd() );
        image->SetEnd( exchp );

        int atmp = track->GetWidth();
        track->SetWidth( image->GetWidth() );
        image->SetWidth( atmp );

        if( Type() == PCB_VIA_T )
        {
            VIA *via = static_cast<VIA*>( this );
            VIA *viaimage = static_cast<VIA*>( aImage );

            VIATYPE_T viatmp = via->GetViaType();
            via->SetViaType( viaimage->GetViaType() );
            viaimage->SetViaType( viatmp );

            int drilltmp = via->GetDrillValue();

            if( via->IsDrillDefault() )
                drilltmp = -1;

            int itmp = viaimage->GetDrillValue();

            if( viaimage->IsDrillDefault() )
                itmp = -1;

            std::swap(itmp, drilltmp );

            if( drilltmp > 0 )
                via->SetDrill( drilltmp );
            else
                via->SetDrillDefault();

            if( itmp > 0 )
                viaimage->SetDrill( itmp );
            else
                viaimage->SetDrillDefault();
        }
    }
        break;

    case PCB_TEXT_T:
        std::swap( *((TEXTE_PCB*)this), *((TEXTE_PCB*)aImage) );
        break;

    case PCB_TARGET_T:
        std::swap( *((PCB_TARGET*)this), *((PCB_TARGET*)aImage) );
        break;
//.........这里部分代码省略.........

int PCBNEW_CONTROL::AppendBoard( const TOOL_EVENT& aEvent )
{
    int open_ctl;
    wxString fileName;

    PCB_EDIT_FRAME* editFrame = dynamic_cast<PCB_EDIT_FRAME*>( m_frame );
    BOARD* board = getModel<BOARD>();
    BOARD_COMMIT commit( editFrame );

    if( !editFrame )
        return 0;

    // Pick a file to append
    if( !AskLoadBoardFileName( editFrame, &open_ctl, &fileName, true ) )
        return 0;

    IO_MGR::PCB_FILE_T pluginType = plugin_type( fileName, open_ctl );
    PLUGIN::RELEASER pi( IO_MGR::PluginFind( pluginType ) );

    // keep track of existing items, in order to know what are the new items
    // (for undo command for instance)

    // Tracks are inserted, not appended, so mark the existing tracks to know what are the new tracks
    for( TRACK* track = board->m_Track; track; track = track->Next() )
        track->SetFlags( FLAG0 );

    // Other items are appended to the item list, so keep trace to the last existing item is enough
    MODULE* module = board->m_Modules.GetLast();
    BOARD_ITEM* drawing = board->m_Drawings.GetLast();
    int zonescount = board->GetAreaCount();

    // Keep also the count of copper layers, to adjust if necessary
    int initialCopperLayerCount = board->GetCopperLayerCount();
    LSET initialEnabledLayers = board->GetEnabledLayers();

    // Load the data
    try
    {
        PROPERTIES  props;
        char        xbuf[30];
        char        ybuf[30];

        // EAGLE_PLUGIN can use this info to center the BOARD, but it does not yet.
        sprintf( xbuf, "%d", editFrame->GetPageSizeIU().x );
        sprintf( ybuf, "%d", editFrame->GetPageSizeIU().y );

        props["page_width"]  = xbuf;
        props["page_height"] = ybuf;

        editFrame->GetDesignSettings().m_NetClasses.Clear();
        pi->Load( fileName, board, &props );
    }
    catch( const IO_ERROR& ioe )
    {
        wxString msg = wxString::Format( _( "Error loading board.\n%s" ), GetChars( ioe.What() ));
        DisplayError( editFrame, msg );

        return 0;
    }

    m_toolMgr->RunAction( COMMON_ACTIONS::selectionClear, true );

    // Process the new items
    for( TRACK* track = board->m_Track; track; track = track->Next() )
    {
        if( track->GetFlags() & FLAG0 )
        {
            track->ClearFlags( FLAG0 );
            continue;
        }

        commit.Added( track );
        m_toolMgr->RunAction( COMMON_ACTIONS::selectItem, true, track );
    }

    module = module ? module->Next() : board->m_Modules;

    for( ; module; module = module->Next() )
    {
        commit.Added( module );
        m_toolMgr->RunAction( COMMON_ACTIONS::selectItem, true, module );
    }

    drawing = drawing ? drawing->Next() : board->m_Drawings;

    for( ; drawing; drawing = drawing->Next() )
    {
        commit.Added( drawing );
        m_toolMgr->RunAction( COMMON_ACTIONS::selectItem, true, drawing );
    }

    for( ZONE_CONTAINER* zone = board->GetArea( zonescount ); zone;
         zone = board->GetArea( zonescount ) )
    {
        ++zonescount;
        commit.Added( zone );
        m_toolMgr->RunAction( COMMON_ACTIONS::selectItem, true, zone );
    }

    if( commit.Empty() )
//.........这里部分代码省略.........

bool DRC::doTrackDrc( TRACK* aRefSeg, TRACK* aStart, bool testPads )
{
    TRACK*    track;
    wxPoint   delta;           // lenght on X and Y axis of segments
    LSET layerMask;
    int       net_code_ref;
    wxPoint   shape_pos;

    NETCLASSPTR netclass = aRefSeg->GetNetClass();
    BOARD_DESIGN_SETTINGS& dsnSettings = m_pcb->GetDesignSettings();

    /* In order to make some calculations more easier or faster,
     * pads and tracks coordinates will be made relative to the reference segment origin
     */
    wxPoint origin = aRefSeg->GetStart();  // origin will be the origin of other coordinates

    m_segmEnd   = delta = aRefSeg->GetEnd() - origin;
    m_segmAngle = 0;

    layerMask    = aRefSeg->GetLayerSet();
    net_code_ref = aRefSeg->GetNetCode();

    // Phase 0 : Test vias
    if( aRefSeg->Type() == PCB_VIA_T )
    {
        const VIA *refvia = static_cast<const VIA*>( aRefSeg );
        // test if the via size is smaller than minimum
        if( refvia->GetViaType() == VIA_MICROVIA )
        {
            if( refvia->GetWidth() < dsnSettings.m_MicroViasMinSize )
            {
                m_currentMarker = fillMarker( refvia, NULL,
                                              DRCE_TOO_SMALL_MICROVIA, m_currentMarker );
                return false;
            }
        }
        else
        {
            if( refvia->GetWidth() < dsnSettings.m_ViasMinSize )
            {
                m_currentMarker = fillMarker( refvia, NULL,
                                              DRCE_TOO_SMALL_VIA, m_currentMarker );
                return false;
            }
        }

        // test if via's hole is bigger than its diameter
        // This test is necessary since the via hole size and width can be modified
        // and a default via hole can be bigger than some vias sizes
        if( refvia->GetDrillValue() > refvia->GetWidth() )
        {
            m_currentMarker = fillMarker( refvia, NULL,
                                          DRCE_VIA_HOLE_BIGGER, m_currentMarker );
            return false;
        }

        // For microvias: test if they are blind vias and only between 2 layers
        // because they are used for very small drill size and are drill by laser
        // and **only one layer** can be drilled
        if( refvia->GetViaType() == VIA_MICROVIA )
        {
            LAYER_ID    layer1, layer2;
            bool        err = true;

            refvia->LayerPair( &layer1, &layer2 );

            if( layer1 > layer2 )
                EXCHG( layer1, layer2 );

#if 0   // was:
            // test:
            if( layer1 == B_Cu && layer2 == LAYER_N_2 )
                err = false;

            if( layer1 == (m_pcb->GetDesignSettings().GetCopperLayerCount() - 2 )
                && layer2 == F_Cu )
                err = false;
#else
            if( layer2 == B_Cu && layer1 == m_pcb->GetDesignSettings().GetCopperLayerCount() - 2 )
                err = false;

            else if( layer1 == F_Cu  &&  layer2 == In1_Cu  )
                err = false;
#endif

            if( err )
            {
                m_currentMarker = fillMarker( refvia, NULL,
                                              DRCE_MICRO_VIA_INCORRECT_LAYER_PAIR, m_currentMarker );
                return false;
            }
        }
    }
    else    // This is a track segment
    {
        if( aRefSeg->GetWidth() < dsnSettings.m_TrackMinWidth )
        {
            m_currentMarker = fillMarker( aRefSeg, NULL,
                                          DRCE_TOO_SMALL_TRACK_WIDTH, m_currentMarker );
            return false;
//.........这里部分代码省略.........

void DIALOG_GENDRILL::InitDisplayParams()
{
    wxString msg;

    m_Choice_Unit->SetSelection( m_UnitDrillIsInch ? 1 : 0 );
    m_Choice_Zeros_Format->SetSelection( m_ZerosFormat );
    UpdatePrecisionOptions();
    m_Check_Minimal->SetValue( m_MinimalHeader );

    if( m_DrillOriginIsAuxAxis )
        m_Choice_Drill_Offset->SetSelection( 1 );

    m_Check_Mirror->SetValue( m_Mirror );
    m_Check_Merge_PTH_NPTH->SetValue( m_Merge_PTH_NPTH );
    m_Choice_Drill_Map->SetSelection( m_mapFileType );
    m_ViaDrillValue->SetLabel( _( "Use Netclasses values" ) );
    m_MicroViaDrillValue->SetLabel( _( "Use Netclasses values" ) );

    // See if we have some buried vias or/and microvias, and display
    // microvias drill value if so
    m_throughViasCount = 0;
    m_microViasCount   = 0;
    m_blindOrBuriedViasCount = 0;

    for( TRACK* track = m_parent->GetBoard()->m_Track; track != NULL; track = track->Next() )
    {
        if( track->Type() != PCB_VIA_T )
            continue;

        if( track->GetShape() == VIA_THROUGH )
            m_throughViasCount++;
        else if( track->GetShape() == VIA_MICROVIA )
            m_microViasCount++;
        else if( track->GetShape() == VIA_BLIND_BURIED )
            m_blindOrBuriedViasCount++;
    }

    m_MicroViaDrillValue->Enable( m_microViasCount );

    // Count plated pad holes and not plated pad holes:
    m_platedPadsHoleCount    = 0;
    m_notplatedPadsHoleCount = 0;

    for( MODULE* module = m_parent->GetBoard()->m_Modules;  module;  module = module->Next() )
    {
        for( D_PAD* pad = module->Pads(); pad != NULL; pad = pad->Next() )
        {
            if( pad->GetDrillShape() == PAD_DRILL_CIRCLE )
            {
                if( pad->GetDrillSize().x != 0 )
                {
                    if( pad->GetAttribute() == PAD_HOLE_NOT_PLATED )
                        m_notplatedPadsHoleCount++;
                    else
                        m_platedPadsHoleCount++;
                }
            }
            else
            {
                if( pad->GetDrillSize().x != 0 && pad->GetDrillSize().y != 0 )
                {
                    if( pad->GetAttribute() == PAD_HOLE_NOT_PLATED )
                        m_notplatedPadsHoleCount++;
                    else
                        m_platedPadsHoleCount++;
                }
            }
        }
    }

    // Display hole counts:
    msg = m_PlatedPadsCountInfoMsg->GetLabel();
    msg << wxT( " " ) << m_platedPadsHoleCount;
    m_PlatedPadsCountInfoMsg->SetLabel( msg );

    msg = m_NotPlatedPadsCountInfoMsg->GetLabel();
    msg << wxT( " " ) << m_notplatedPadsHoleCount;
    m_NotPlatedPadsCountInfoMsg->SetLabel( msg );

    msg = m_ThroughViasInfoMsg->GetLabel();
    msg << wxT( " " ) << m_throughViasCount;
    m_ThroughViasInfoMsg->SetLabel( msg );

    msg = m_MicroViasInfoMsg->GetLabel();
    msg << wxT( " " ) << m_microViasCount;
    m_MicroViasInfoMsg->SetLabel( msg );

    msg = m_BuriedViasInfoMsg->GetLabel();
    msg << wxT( " " ) << m_blindOrBuriedViasCount;
    m_BuriedViasInfoMsg->SetLabel( msg );

    // Output directory
    m_outputDirectoryName->SetValue( m_plotOpts.GetOutputDirectory() );
}

//.........这里部分代码省略.........
            }
        }

        if( m_DelTexts->GetValue() )
        {
            LSET del_text_layers = layers_filter;

            for( item = pcb->m_Drawings; item; item = nextitem )
            {
                nextitem = item->Next();

                if( item->Type() == PCB_TEXT_T  &&  del_text_layers[item->GetLayer()] )
                {
                    itemPicker.SetItem( item );
                    pickersList.PushItem( itemPicker );
                    item->ViewRelease();
                    item->UnLink();
                }
            }
        }

        if( m_DelModules->GetValue() )
        {
            for( item = pcb->m_Modules; item; item = nextitem )
            {
                nextitem = item->Next();

                if( layers_filter[item->GetLayer()] &&
                    ( ( m_ModuleFilterNormal->GetValue() && !item->IsLocked() ) ||
                      ( m_ModuleFilterLocked->GetValue() && item->IsLocked() ) ) )
                {
                    itemPicker.SetItem( item );
                    pickersList.PushItem( itemPicker );
                    static_cast<MODULE*>( item )->RunOnChildren(
                            boost::bind( &KIGFX::VIEW_ITEM::ViewRelease, _1 ) );
                    ratsnest->Remove( item );
                    item->ViewRelease();
                    item->UnLink();
                    gen_rastnest = true;
                }
            }
        }

        if( m_DelTracks->GetValue() )
        {
            STATUS_FLAGS track_mask_filter = 0;

            if( !m_TrackFilterLocked->GetValue() )
                track_mask_filter |= TRACK_LOCKED;

            if( !m_TrackFilterAR->GetValue() )
                track_mask_filter |= TRACK_AR;

            TRACK* nexttrack;

            for( TRACK *track = pcb->m_Track; track; track = nexttrack )
            {
                nexttrack = track->Next();

                if( ( track->GetState( TRACK_LOCKED | TRACK_AR ) & track_mask_filter ) != 0 )
                    continue;

                if( ( track->GetState( TRACK_LOCKED | TRACK_AR ) == 0 ) &&
                    !m_TrackFilterNormal->GetValue() )
                    continue;

                if( ( track->Type() == PCB_VIA_T ) && !m_TrackFilterVias->GetValue() )
                    continue;

                if( ( track->GetLayerSet() & layers_filter ) == 0 )
                    continue;

                itemPicker.SetItem( track );
                pickersList.PushItem( itemPicker );
                track->ViewRelease();
                ratsnest->Remove( track );
                track->UnLink();
                gen_rastnest = true;
            }
        }

        if( pickersList.GetCount() )
            m_Parent->SaveCopyInUndoList( pickersList, UR_DELETED );

        if( m_DelMarkers->GetValue() )
            pcb->DeleteMARKERs();

        if( gen_rastnest )
            m_Parent->Compile_Ratsnest( NULL, true );

        if( m_Parent->IsGalCanvasActive() )
            pcb->GetRatsnest()->Recalculate();

    }

    m_Parent->GetCanvas()->Refresh();
    m_Parent->OnModify();

    EndModal( 1 );
}

// Handles the selection of command events.
void PCB_EDIT_FRAME::Process_Special_Functions( wxCommandEvent& event )
{
    int         id = event.GetId();
    LAYER_NUM itmp;
    INSTALL_UNBUFFERED_DC( dc, m_canvas );
    MODULE* module;

    m_canvas->CrossHairOff( &dc );

    switch( id )   // Some (not all ) edit commands must be finished or aborted
    {
    case wxID_CUT:
    case wxID_COPY:
    case ID_PCB_USER_GRID_SETUP:
    case ID_TOOLBARH_PCB_SELECT_LAYER:
    case ID_AUX_TOOLBAR_PCB_SELECT_LAYER_PAIR:
    case ID_POPUP_PCB_ROTATE_TEXTEPCB:
    case ID_POPUP_PCB_FLIP_TEXTEPCB:
    case ID_POPUP_PCB_COPY_TEXTEPCB:
    case ID_POPUP_PCB_EDIT_TEXTEPCB:
    case ID_POPUP_PCB_EDIT_MIRE:
    case ID_POPUP_PCB_ROTATE_TEXTMODULE:
    case ID_POPUP_PCB_ROTATE_MODULE_CLOCKWISE:
    case ID_POPUP_PCB_ROTATE_MODULE_COUNTERCLOCKWISE:
    case ID_POPUP_PCB_CHANGE_SIDE_MODULE:
    case ID_POPUP_PCB_EDIT_MODULE_PRMS:
    case ID_POPUP_PCB_EDIT_MODULE_WITH_MODEDIT:
    case ID_POPUP_PCB_EDIT_TEXTMODULE:
    case ID_POPUP_PCB_STOP_CURRENT_DRAWING:
    case ID_POPUP_PCB_BEGIN_TRACK:
    case ID_POPUP_PCB_END_TRACK:
    case ID_POPUP_PCB_PLACE_THROUGH_VIA:
    case ID_POPUP_PCB_SELECT_CU_LAYER_AND_PLACE_THROUGH_VIA:
    case ID_POPUP_PCB_PLACE_BLIND_BURIED_VIA:
    case ID_POPUP_PCB_SELECT_CU_LAYER_AND_PLACE_BLIND_BURIED_VIA:
    case ID_POPUP_PCB_PLACE_MICROVIA:
    case ID_POPUP_PCB_SWITCH_TRACK_POSTURE:
    case ID_POPUP_PCB_IMPORT_PAD_SETTINGS:
    case ID_POPUP_PCB_EXPORT_PAD_SETTINGS:
    case ID_POPUP_PCB_GLOBAL_IMPORT_PAD_SETTINGS:
    case ID_POPUP_PCB_STOP_CURRENT_EDGE_ZONE:
    case ID_POPUP_PCB_DELETE_ZONE_LAST_CREATED_CORNER:
    case ID_POPUP_PCB_FILL_ALL_ZONES:
    case ID_POPUP_PCB_REMOVE_FILLED_AREAS_IN_ALL_ZONES:
    case ID_POPUP_PCB_REMOVE_FILLED_AREAS_IN_CURRENT_ZONE:
    case ID_POPUP_PCB_PLACE_ZONE_CORNER:
    case ID_POPUP_PCB_PLACE_ZONE_OUTLINES:
    case ID_POPUP_PCB_EDIT_ZONE_PARAMS:
    case ID_POPUP_PCB_DELETE_ZONE:
    case ID_POPUP_PCB_MOVE_ZONE_CORNER:
    case ID_POPUP_PCB_DRAG_ZONE_OUTLINE_SEGMENT:
    case ID_POPUP_PCB_MOVE_ZONE_OUTLINES:
    case ID_POPUP_PCB_ADD_ZONE_CORNER:
    case ID_POPUP_PCB_DELETE_TRACKSEG:
    case ID_POPUP_PCB_DELETE_TRACK:
    case ID_POPUP_PCB_DELETE_TRACKNET:
    case ID_POPUP_PCB_FILL_ZONE:
    case ID_POPUP_PCB_SELECT_LAYER:
    case ID_POPUP_PCB_SELECT_CU_LAYER:
    case ID_POPUP_PCB_SELECT_LAYER_PAIR:
    case ID_POPUP_PCB_SELECT_NO_CU_LAYER:
    case ID_POPUP_PCB_MOVE_TRACK_NODE:
    case ID_POPUP_PCB_MOVE_TEXTEPCB_REQUEST:
    case ID_POPUP_PCB_DRAG_TRACK_SEGMENT_KEEP_SLOPE:
    case ID_POPUP_PCB_DRAG_TRACK_SEGMENT:
    case ID_POPUP_PCB_MOVE_TRACK_SEGMENT:
    case ID_POPUP_PCB_PLACE_MOVED_TRACK_NODE:
    case ID_POPUP_PCB_BREAK_TRACK:
    case ID_POPUP_PCB_EDIT_NET:
    case ID_POPUP_PCB_EDIT_TRACK:
    case ID_POPUP_PCB_EDIT_TRACKSEG:
    case ID_POPUP_PCB_LOCK_ON_TRACKSEG:
    case ID_POPUP_PCB_LOCK_OFF_TRACKSEG:
    case ID_POPUP_PCB_LOCK_ON_TRACK:
    case ID_POPUP_PCB_LOCK_OFF_TRACK:
    case ID_POPUP_PCB_LOCK_ON_NET:
    case ID_POPUP_PCB_LOCK_OFF_NET:
    case ID_POPUP_DELETE_BLOCK:
    case ID_POPUP_PLACE_BLOCK:
    case ID_POPUP_ZOOM_BLOCK:
    case ID_POPUP_FLIP_BLOCK:
    case ID_POPUP_ROTATE_BLOCK:
    case ID_POPUP_COPY_BLOCK:
    case ID_POPUP_PCB_EDIT_DRAWING:
    case ID_POPUP_PCB_GETINFO_MARKER:
    case ID_POPUP_PCB_MOVE_TEXT_DIMENSION_REQUEST:
    case ID_POPUP_PCB_DRAG_MODULE_REQUEST:
    case ID_POPUP_PCB_MOVE_MODULE_REQUEST:
    case ID_POPUP_PCB_MOVE_TEXTMODULE_REQUEST:
    case ID_POPUP_PCB_MOVE_MIRE_REQUEST:
        break;

    case ID_POPUP_CANCEL_CURRENT_COMMAND:
        if( m_canvas->IsMouseCaptured() )
        {
            m_canvas->EndMouseCapture();
        }

        // Should not be executed, just in case
//.........这里部分代码省略.........

void PCB_EDIT_FRAME::StartMoveOneNodeOrSegment( TRACK* aTrack, wxDC* aDC, int aCommand )
{
    if( !aTrack )
        return;

    EraseDragList();

    // Change highlighted net: the new one will be highlighted
    GetBoard()->PushHighLight();

    if( GetBoard()->IsHighLightNetON() )
        HighLight( aDC );

    PosInit = GetCrossHairPosition();

    if( aTrack->Type() == PCB_VIA_T )
    {
        aTrack->SetFlags( IS_DRAGGED | STARTPOINT | ENDPOINT );
        AddSegmentToDragList( aTrack->GetFlags(), aTrack );

        if( aCommand != ID_POPUP_PCB_MOVE_TRACK_SEGMENT )
        {
            Collect_TrackSegmentsToDrag( GetBoard(), aTrack->GetStart(),
                                         aTrack->GetLayerSet(),
                                         aTrack->GetNetCode(), aTrack->GetWidth() / 2 );
        }

        PosInit = aTrack->GetStart();
    }
    else
    {
        STATUS_FLAGS diag = aTrack->IsPointOnEnds( GetCrossHairPosition(), -1 );
        wxPoint pos;

        switch( aCommand )
        {
        case ID_POPUP_PCB_MOVE_TRACK_SEGMENT:   // Move segment
            aTrack->SetFlags( IS_DRAGGED | ENDPOINT | STARTPOINT );
            AddSegmentToDragList( aTrack->GetFlags(), aTrack );
            break;

        case ID_POPUP_PCB_DRAG_TRACK_SEGMENT:   // drag a segment
            pos = aTrack->GetStart();
            Collect_TrackSegmentsToDrag( GetBoard(), pos, aTrack->GetLayerSet(),
                                         aTrack->GetNetCode(), aTrack->GetWidth() / 2 );
            pos = aTrack->GetEnd();
            aTrack->SetFlags( IS_DRAGGED | ENDPOINT | STARTPOINT );
            Collect_TrackSegmentsToDrag( GetBoard(), pos, aTrack->GetLayerSet(),
                                         aTrack->GetNetCode(), aTrack->GetWidth() / 2 );
            break;

        case ID_POPUP_PCB_MOVE_TRACK_NODE:  // Drag via or move node
            pos = (diag & STARTPOINT) ? aTrack->GetStart() : aTrack->GetEnd();
            Collect_TrackSegmentsToDrag( GetBoard(), pos, aTrack->GetLayerSet(),
                                         aTrack->GetNetCode(), aTrack->GetWidth() / 2 );
            PosInit = pos;
            break;
        }

        aTrack->SetFlags( IS_DRAGGED );
    }

    // Prepare the Undo command
    ITEM_PICKER picker( aTrack, UR_CHANGED );
    picker.SetLink( aTrack->Clone() );
    s_ItemsListPicker.PushItem( picker );

    for( unsigned ii = 0; ii < g_DragSegmentList.size(); ii++ )
    {
        TRACK* draggedtrack = g_DragSegmentList[ii].m_Track;
        picker.SetItem( draggedtrack );
        picker.SetLink( draggedtrack->Clone() );
        s_ItemsListPicker.PushItem( picker );
        draggedtrack = (TRACK*) picker.GetLink();
        draggedtrack->SetStatus( 0 );
        draggedtrack->ClearFlags();
    }

    s_LastPos = PosInit;
    m_canvas->SetMouseCapture( Show_MoveNode, Abort_MoveTrack );

    GetBoard()->SetHighLightNet( aTrack->GetNetCode() );
    GetBoard()->HighLightON();

    GetBoard()->DrawHighLight( m_canvas, aDC, GetBoard()->GetHighLightNetCode() );
    m_canvas->CallMouseCapture( aDC, wxDefaultPosition, true );

    UndrawAndMarkSegmentsToDrag( m_canvas, aDC );
}

void PCB_EDIT_FRAME::Start_DragTrackSegmentAndKeepSlope( TRACK* track, wxDC*  DC )
{
    TRACK* TrackToStartPoint = NULL;
    TRACK* TrackToEndPoint   = NULL;
    bool   error = false;

    if( !track )
        return;

    // TODO: Use cleanup functions to merge collinear segments if track
    // is connected to a collinear segment.

    s_StartSegmentPresent = s_EndSegmentPresent = true;

    if( ( track->start == NULL ) || ( track->start->Type() == PCB_TRACE_T ) )
        TrackToStartPoint = track->GetTrack( GetBoard()->m_Track, NULL, ENDPOINT_START, true, false );

    //  Test if more than one segment is connected to this point
    if( TrackToStartPoint )
    {
        TrackToStartPoint->SetState( BUSY, true );

        if( ( TrackToStartPoint->Type() == PCB_VIA_T )
           || track->GetTrack( GetBoard()->m_Track, NULL, ENDPOINT_START, true, false ) )
            error = true;

        TrackToStartPoint->SetState( BUSY, false );
    }

    if( ( track->end == NULL ) || ( track->end->Type() == PCB_TRACE_T ) )
        TrackToEndPoint = track->GetTrack( GetBoard()->m_Track, NULL, ENDPOINT_END, true, false );

    //  Test if more than one segment is connected to this point
    if( TrackToEndPoint )
    {
        TrackToEndPoint->SetState( BUSY, true );

        if( (TrackToEndPoint->Type() == PCB_VIA_T)
           || track->GetTrack( GetBoard()->m_Track, NULL, ENDPOINT_END, true, false ) )
            error = true;

        TrackToEndPoint->SetState( BUSY, false );
    }

    if( error )
    {
        DisplayError( this,
                      _( "Unable to drag this segment: too many segments connected" ) );
        return;
    }

    if( !TrackToStartPoint || ( TrackToStartPoint->Type() != PCB_TRACE_T ) )
        s_StartSegmentPresent = false;

    if( !TrackToEndPoint || ( TrackToEndPoint->Type() != PCB_TRACE_T ) )
        s_EndSegmentPresent = false;

    // Change high light net: the new one will be highlighted
    GetBoard()->PushHighLight();

    if( GetBoard()->IsHighLightNetON() )
        HighLight( DC );

    EraseDragList();

    track->SetFlags( IS_DRAGGED );

    if( TrackToStartPoint )
    {
        STATUS_FLAGS flag = STARTPOINT;

        if( track->GetStart() != TrackToStartPoint->GetStart() )
            flag = ENDPOINT;

        AddSegmentToDragList( flag, TrackToStartPoint );
        track->SetFlags( STARTPOINT );
    }

    if( TrackToEndPoint )
    {
        STATUS_FLAGS flag = STARTPOINT;

        if( track->GetEnd() != TrackToEndPoint->GetStart() )
            flag = ENDPOINT;

        AddSegmentToDragList( flag, TrackToEndPoint );
        track->SetFlags( ENDPOINT );
    }

    AddSegmentToDragList( track->GetFlags(), track );

    UndrawAndMarkSegmentsToDrag( m_canvas, DC );


    PosInit   = GetCrossHairPosition();
    s_LastPos = GetCrossHairPosition();
    m_canvas->SetMouseCapture( Show_Drag_Track_Segment_With_Cte_Slope, Abort_MoveTrack );

    GetBoard()->SetHighLightNet( track->GetNetCode() );
    GetBoard()->HighLightON();
//.........这里部分代码省略.........

/* Init variables (slope, Y intersect point, flags) for
 * Show_Drag_Track_Segment_With_Cte_Slope()
 *  return true if Ok, false if dragging is not possible
 *  (2 colinear segments)
 */
bool InitialiseDragParameters()
{
    double     tx1, tx2, ty1, ty2; // temporary storage of points
    TRACK*     Track;
    TRACK*     tSegmentToStart = NULL, * tSegmentToEnd = NULL;

    if( g_DragSegmentList.size() == 0 )
        return false;

    /* get the segments :
     * from last to first in list are:
     * the segment to move
     * the segment connected to its end point (if exists)
     * the segment connected to its start point (if exists)
     */
    int ii = g_DragSegmentList.size() - 1;
    Track = g_DragSegmentList[ii].m_Track;
    if( Track == NULL )
        return false;

    ii--;

    if( ii >= 0)
    {
        if( s_EndSegmentPresent )
        {
            tSegmentToEnd = g_DragSegmentList[ii].m_Track;  // Get the segment connected to
                                                           // the end point
            ii--;
        }

        if( s_StartSegmentPresent )
        {
            if( ii  >= 0 )
                tSegmentToStart = g_DragSegmentList[ii].m_Track;  // Get the segment connected to
                                                                 // the start point
        }
    }

    // would be nice to eliminate collinear segments here, so we don't
    // have to deal with that annoying "Unable to drag this segment: two
    // collinear segments"

    s_StartPointVertical = false;
    s_EndPointVertical   = false;
    s_MovingSegmentVertical   = false;
    s_StartPointHorizontal    = false;
    s_EndPointHorizontal      = false;
    s_MovingSegmentHorizontal = false;

    // Init parameters for the starting point of the moved segment
    if( tSegmentToStart )
    {
        if( tSegmentToStart->GetFlags() & ENDPOINT )
        {
            tx1 = (double) tSegmentToStart->GetStart().x;
            ty1 = (double) tSegmentToStart->GetStart().y;
            tx2 = (double) tSegmentToStart->GetEnd().x;
            ty2 = (double) tSegmentToStart->GetEnd().y;
        }
        else
        {
            tx1 = (double) tSegmentToStart->GetEnd().x;
            ty1 = (double) tSegmentToStart->GetEnd().y;
            tx2 = (double) tSegmentToStart->GetStart().x;
            ty2 = (double) tSegmentToStart->GetStart().y;
        }
    }
    else // move the start point on a line starting at Track->GetStart(), and perpendicular to Track
    {
        tx1 = (double) Track->GetStart().x;
        ty1 = (double) Track->GetStart().y;
        tx2 = (double) Track->GetEnd().x;
        ty2 = (double) Track->GetEnd().y;
        RotatePoint( &tx2, &ty2, tx1, ty1, 900 );
    }

    if( tx1 != tx2 )
    {
        s_StartSegmentSlope = ( ty2 - ty1 ) / ( tx2 - tx1 );
        s_StartSegment_Yorg = ty1 - ( ty2 - ty1 ) * tx1 / ( tx2 - tx1 );
    }
    else
    {
        s_StartPointVertical = true;            //signal first segment vertical
    }

    if( ty1 == ty2 )
    {
        s_StartPointHorizontal = true;
    }

    // Init parameters for the ending point of the moved segment
    if( tSegmentToEnd )
    {
//.........这里部分代码省略.........

/* drawing the track segment movement
 *  > s_MovingSegmentSlope slope = moving track segment slope
 *  > s_StartSegmentSlope slope = slope of the segment connected to the start
 * point of the moving segment
 *  > s_EndSegmentSlope slope = slope of the segment connected to the end point
 * of the moving segment
 *
 *  moved segment function :
 *      yt=s_MovingSegmentSlope * x + s_MovingSegment_Yorg
 *
 *  segment connected to moved segment's start:
 *      y1 = s_StartSegmentSlope * x + s_StartSegment_Yorg
 *
 *  segment connected to moved segment's end:
 *      y2=s_EndSegmentSlope * x + s_EndSegment_Yorg
 *
 *  first intersection point will be located at
 *      y1=yt ->
 *
 * xi1=(s_MovingSegment_Yorg-s_StartSegment_Yorg)/(s_StartSegmentSlope-s_MovingSegmentSlope)
 *      yi1=s_MovingSegmentSlope*xi1+s_MovingSegment_Yorg
 *      or yi1=s_StartSegmentSlope*xi1+s_MovingSegment_Yorg
 *
 *  second intersection point
 *      y2=yt ->
 *
 * xi2=(s_MovingSegment_Yorg-s_StartSegment_Yorg)/(s_MovingSegmentSlope-s_MovingSegmentSlope)
 *      yi2=s_MovingSegmentSlope*xi2+s_MovingSegment_Yorg
 *      or yi1=s_EndSegmentSlope*xi2+s_MovingSegment_Yorg
 *  !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 *  !!!!!    special attention to vertical segments because
 *  !!!!!    their slope=infinite
 *  !!!!!    intersection point will be calculated using the
 *  !!!!!    segment intersecting it
 *  !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 *
 *  Slope parameters are computed once, because they can become undetermined
 * when moving segments
 *  (i.e. when a segment length is 0) and we want keep them constant
 */
static void Show_Drag_Track_Segment_With_Cte_Slope( EDA_DRAW_PANEL* aPanel, wxDC* aDC,
                                                    const wxPoint& aPosition, bool aErase )
{
    double       xi1 = 0, yi1 = 0, xi2 = 0, yi2 = 0;    // calculated intersection points
    double       tx1, tx2, ty1, ty2;                    // temporary storage of points
    int          dx, dy;
    bool         update = true;
    TRACK*       Track;
    TRACK*       tSegmentToStart = NULL, * tSegmentToEnd = NULL;

    if( g_DragSegmentList.size() == 0 )
        return;

    /* get the segments :
     * from last to first in list are:
     * the segment to move
     * the segment connected to its end point (if exists)
     * the segment connected to its start point (if exists)
     */
    int ii = g_DragSegmentList.size() - 1;
    Track = g_DragSegmentList[ii].m_Track;

    if( Track == NULL )
        return;

    ii--;

    if( ii >= 0)
    {
        if( s_EndSegmentPresent )
        {
            // Get the segment connected to the end point
            tSegmentToEnd   = g_DragSegmentList[ii].m_Track;
            ii--;
        }

        if( s_StartSegmentPresent )
        {
            // Get the segment connected to the start point
            if( ii >= 0 )
                tSegmentToStart = g_DragSegmentList[ii].m_Track;
        }
    }

    GR_DRAWMODE draw_mode = GR_XOR | GR_HIGHLIGHT;

    // Undraw the current moved track segments before modification

#ifndef USE_WX_OVERLAY
//  if( erase )
    {
        Track->Draw( aPanel, aDC, draw_mode );

        if( tSegmentToStart )
            tSegmentToStart->Draw( aPanel, aDC, draw_mode );

        if( tSegmentToEnd )
            tSegmentToEnd->Draw( aPanel, aDC, draw_mode );
    }
#endif
//.........这里部分代码省略.........

// Redraw the moved node according to the mouse cursor position
static void Show_MoveNode( EDA_DRAW_PANEL* aPanel, wxDC* aDC, const wxPoint& aPosition,
                           bool aErase )
{
    auto displ_opts = (PCB_DISPLAY_OPTIONS*) aPanel->GetDisplayOptions();
    wxPoint      moveVector;
    int          tmp = displ_opts->m_DisplayPcbTrackFill;
    GR_DRAWMODE  draw_mode = GR_XOR | GR_HIGHLIGHT;

    displ_opts->m_DisplayPcbTrackFill = false;

#ifndef USE_WX_OVERLAY
    aErase = true;
#else
    aErase = false;
#endif

    // set the new track coordinates
    wxPoint Pos = aPanel->GetParent()->GetCrossHairPosition();

    moveVector = Pos - s_LastPos;
    s_LastPos  = Pos;

    TRACK *track = NULL;

    for( unsigned ii = 0; ii < g_DragSegmentList.size(); ii++ )
    {
        track = g_DragSegmentList[ii].m_Track;

        if( aErase )
            track->Draw( aPanel, aDC, draw_mode );

        if( track->GetFlags() & STARTPOINT )
            track->SetStart( track->GetStart() + moveVector );

        if( track->GetFl