void update() override
    {
        SELECTION_TOOL* selTool = getToolManager()->GetTool<SELECTION_TOOL>();

        // enable zone actions that act on a single zone
        bool singleZoneActionsEnabled = ( SELECTION_CONDITIONS::Count( 1 )
                                          && SELECTION_CONDITIONS::OnlyType( PCB_ZONE_AREA_T )
                                        )( selTool->GetSelection() );

        Enable( getMenuId( PCB_ACTIONS::zoneDuplicate ), singleZoneActionsEnabled );
        Enable( getMenuId( PCB_ACTIONS::drawZoneCutout ), singleZoneActionsEnabled );
        Enable( getMenuId( PCB_ACTIONS::drawSimilarZone ), singleZoneActionsEnabled );

        // enable zone actions that ably to a specific set of zones (as opposed to all of them)
        bool nonGlobalActionsEnabled = ( SELECTION_CONDITIONS::MoreThan( 0 ) )( selTool->GetSelection() );

        Enable( getMenuId( PCB_ACTIONS::zoneFill ), nonGlobalActionsEnabled );
        Enable( getMenuId( PCB_ACTIONS::zoneUnfill ), nonGlobalActionsEnabled );

        // lines like this make me really think about a better name for SELECTION_CONDITIONS class
        bool mergeEnabled = ( SELECTION_CONDITIONS::MoreThan( 1 ) &&
                              /*SELECTION_CONDITIONS::OnlyType( PCB_ZONE_AREA_T ) &&*/
                              PCB_SELECTION_CONDITIONS::SameNet( true ) &&
                              PCB_SELECTION_CONDITIONS::SameLayer() )( selTool->GetSelection() );

        Enable( getMenuId( PCB_ACTIONS::zoneMerge ), mergeEnabled );
    }

int PCB_EDITOR_CONTROL::SelectionCrossProbe( const TOOL_EVENT& aEvent )
{
    SELECTION_TOOL* selTool = m_toolMgr->GetTool<SELECTION_TOOL>();
    const SELECTION& selection = selTool->GetSelection();

    if( selection.Size() == 1 )
        m_frame->SendMessageToEESCHEMA( selection.Item<BOARD_ITEM>( 0 ) );

    setTransitions();

    return 0;
}

    void update()
    {
        SELECTION_TOOL* selTool = getToolManager()->GetTool<SELECTION_TOOL>();

        // lines like this make me really think about a better name for SELECTION_CONDITIONS class
        bool mergeEnabled = ( SELECTION_CONDITIONS::MoreThan( 1 ) &&
                              /*SELECTION_CONDITIONS::OnlyType( PCB_ZONE_AREA_T ) &&*/
                              SELECTION_CONDITIONS::SameNet( true ) &&
                              SELECTION_CONDITIONS::SameLayer() )( selTool->GetSelection() );

        Enable( getMenuId( COMMON_ACTIONS::zoneMerge ), mergeEnabled );
    }

bool PCB_EDITOR_CONTROL::Init()
{
    auto zoneMenu = std::make_shared<ZONE_CONTEXT_MENU>();
    zoneMenu->SetTool( this );

    auto lockMenu = std::make_shared<LOCK_CONTEXT_MENU>();
    lockMenu->SetTool( this );

    // Add the PCB control menus to relevant other tools

    SELECTION_TOOL* selTool = m_toolMgr->GetTool<SELECTION_TOOL>();

    if( selTool )
    {
        auto& toolMenu = selTool->GetToolMenu();
        auto& menu = toolMenu.GetMenu();

        toolMenu.AddSubMenu( zoneMenu );
        toolMenu.AddSubMenu( lockMenu );

        menu.AddMenu( zoneMenu.get(), false,
                SELECTION_CONDITIONS::OnlyType( PCB_ZONE_AREA_T ) );

        menu.AddMenu( lockMenu.get(), false,
                SELECTION_CONDITIONS::OnlyTypes( GENERAL_COLLECTOR::Tracks ) );
    }

    DRAWING_TOOL* drawingTool = m_toolMgr->GetTool<DRAWING_TOOL>();

    if( drawingTool )
    {
        auto& toolMenu = drawingTool->GetToolMenu();
        auto& menu = toolMenu.GetMenu();

        toolMenu.AddSubMenu( zoneMenu );

        // Functor to say if the PCB_EDIT_FRAME is in a given mode
        // Capture the tool pointer and tool mode by value
        auto toolActiveFunctor = [=]( DRAWING_TOOL::MODE aMode )
        {
            return [=]( const SELECTION& sel )
            {
                return drawingTool->GetDrawingMode() == aMode;
            };
        };

        menu.AddMenu( zoneMenu.get(), false, toolActiveFunctor( DRAWING_TOOL::MODE::ZONE ) );
    }

    return true;
}

bool PCB_EDITOR_CONTROL::Init()
{
    SELECTION_TOOL* selTool = m_toolMgr->GetTool<SELECTION_TOOL>();

    if( selTool )
    {
        selTool->AddSubMenu( new ZONE_CONTEXT_MENU, wxT( "Zones" ),
                             SELECTION_CONDITIONS::OnlyType( PCB_ZONE_AREA_T ) );
    }

    setTransitions();

    return true;
}

bool PCB_EDITOR_CONTROL::Init()
{
    SELECTION_TOOL* selTool = m_toolMgr->GetTool<SELECTION_TOOL>();

    if( selTool )
    {
        m_zoneMenu = new ZONE_CONTEXT_MENU;
        m_zoneMenu->SetTool( this );
        selTool->GetMenu().AddMenu( m_zoneMenu, _( "Zones" ), false,
                                    SELECTION_CONDITIONS::OnlyType( PCB_ZONE_AREA_T ) );
    }

    return true;
}

int PCB_EDITOR_CONTROL::CrossProbePcbToSch( const TOOL_EVENT& aEvent )
{
    if( m_probingSchToPcb )
    {
        m_probingSchToPcb = false;
        return 0;
    }

    SELECTION_TOOL* selTool = m_toolMgr->GetTool<SELECTION_TOOL>();
    const SELECTION& selection = selTool->GetSelection();

    if( selection.Size() == 1 )
        m_frame->SendMessageToEESCHEMA( selection.Item<BOARD_ITEM>( 0 ) );

    return 0;
}

int EDIT_TOOL::CreateArray( const TOOL_EVENT& aEvent )
{
    // first, check if we have a selection, or try to get one
    SELECTION_TOOL* selTool = m_toolMgr->GetTool<SELECTION_TOOL>();
    const SELECTION& selection = selTool->GetSelection();

    // pick up items under the cursor if needed
    if( !hoverSelection() )
        return 0;

    // we have a selection to work on now, so start the tool process
    PCB_BASE_FRAME* editFrame = getEditFrame<PCB_BASE_FRAME>();
    GAL_ARRAY_CREATOR array_creator( *editFrame, m_editModules, selection );
    array_creator.Invoke();

    return 0;
}

int PCB_EDITOR_CONTROL::UpdateSelectionRatsnest( const TOOL_EVENT& aEvent )
{
    SELECTION_TOOL* selTool = m_toolMgr->GetTool<SELECTION_TOOL>();
    const SELECTION& selection = selTool->GetSelection();
    RN_DATA* ratsnest = getModel<BOARD>()->GetRatsnest();

    // Update "simple" ratsnest, computed for currently modified items
    ratsnest->ClearSimple();

    for( auto item : selection )
    {
        ratsnest->Update( static_cast<BOARD_ITEM*>( item ) );
        ratsnest->AddSimple( static_cast<BOARD_ITEM*>( item ) );
    }

    return 0;
}

int PCB_EDITOR_CONTROL::ZoneUnfill( TOOL_EVENT& aEvent )
{
    SELECTION_TOOL* selTool = m_toolMgr->GetTool<SELECTION_TOOL>();
    const SELECTION& selection = selTool->GetSelection();

    for( int i = 0; i < selection.Size(); ++i )
    {
        assert( selection.Item<BOARD_ITEM>( i )->Type() == PCB_ZONE_AREA_T );

        ZONE_CONTAINER* zone = selection.Item<ZONE_CONTAINER>( i );
        zone->SetIsFilled( false );
        zone->ClearFilledPolysList();
        zone->ViewUpdate();
    }

    setTransitions();

    return 0;
}

static bool deleteItem( TOOL_MANAGER* aToolMgr, const VECTOR2D& aPosition )
{
    SELECTION_TOOL* selectionTool = aToolMgr->GetTool<SELECTION_TOOL>();
    assert( selectionTool );

    aToolMgr->RunAction( COMMON_ACTIONS::selectionClear, true );
    aToolMgr->RunAction( COMMON_ACTIONS::selectionCursor, true );
    selectionTool->SanitizeSelection();

    if( selectionTool->GetSelection().Empty() )
        return true;

    if( IsOK( aToolMgr->GetEditFrame(), _( "Are you sure you want to delete item?" ) ) )
        aToolMgr->RunAction( COMMON_ACTIONS::remove, true );
    else
        aToolMgr->RunAction( COMMON_ACTIONS::selectionClear, true );

    return true;
}

int PCB_EDITOR_CONTROL::ZoneUnfill( const TOOL_EVENT& aEvent )
{
    SELECTION_TOOL* selTool = m_toolMgr->GetTool<SELECTION_TOOL>();
    const SELECTION& selection = selTool->GetSelection();
    RN_DATA* ratsnest = getModel<BOARD>()->GetRatsnest();

    for( int i = 0; i < selection.Size(); ++i )
    {
        assert( selection.Item<BOARD_ITEM>( i )->Type() == PCB_ZONE_AREA_T );

        ZONE_CONTAINER* zone = selection.Item<ZONE_CONTAINER>( i );
        zone->SetIsFilled( false );
        zone->ClearFilledPolysList();
        ratsnest->Update( zone );
        zone->ViewUpdate();
    }

    ratsnest->Recalculate();

    return 0;
}

int PCB_EDITOR_CONTROL::modifyLockSelected( MODIFY_MODE aMode )
{
    SELECTION_TOOL* selTool = m_toolMgr->GetTool<SELECTION_TOOL>();
    const SELECTION& selection = selTool->GetSelection();

    if( selection.Empty() )
        m_toolMgr->RunAction( COMMON_ACTIONS::selectionCursor, true );

    bool modified = false;

    for( int i = 0; i < selection.Size(); ++i )
    {
        BOARD_ITEM* item = selection.Item<BOARD_ITEM>( i );
        bool prevState = item->IsLocked();

        switch( aMode )
        {
            case ON:
                item->SetLocked( true );
                break;

            case OFF:
                item->SetLocked( false );
                break;

            case TOGGLE:
                item->SetLocked( !prevState );
                break;
        }

        // Check if we really modified an item
        if( !modified && prevState != item->IsLocked() )
            modified = true;
    }

    if( modified )
        m_frame->OnModify();

    return 0;
}

static bool deleteItem( TOOL_MANAGER* aToolMgr, const VECTOR2D& aPosition )
{
    SELECTION_TOOL* selectionTool = aToolMgr->GetTool<SELECTION_TOOL>();
    assert( selectionTool );

    aToolMgr->RunAction( COMMON_ACTIONS::selectionClear, true );
    aToolMgr->RunAction( COMMON_ACTIONS::selectionCursor, true );
    selectionTool->SanitizeSelection();

    const SELECTION& selection = selectionTool->GetSelection();

    if( selection.Empty() )
        return true;

    bool canBeRemoved = ( selection.Item<EDA_ITEM>( 0 )->Type() != PCB_MODULE_T );

    if( canBeRemoved || IsOK( aToolMgr->GetEditFrame(), _( "Are you sure you want to delete item?" ) ) )
        aToolMgr->RunAction( COMMON_ACTIONS::remove, true );
    else
        aToolMgr->RunAction( COMMON_ACTIONS::selectionClear, true );

    return true;
}

int PCB_EDITOR_CONTROL::ToggleLockModule( const TOOL_EVENT& aEvent )
{
    SELECTION_TOOL* selTool = m_toolMgr->GetTool<SELECTION_TOOL>();
    const SELECTION& selection = selTool->GetSelection();
    bool clearSelection = selection.Empty();

    if( clearSelection )
        m_toolMgr->RunAction( COMMON_ACTIONS::selectionCursor, true );

    for( int i = 0; i < selection.Size(); ++i )
    {
        if( selection.Item<BOARD_ITEM>( i )->Type() == PCB_MODULE_T )
        {
            MODULE* module = selection.Item<MODULE>( i );
            module->SetLocked( !module->IsLocked() );
        }
    }

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

    return 0;
}

int EDIT_TOOL::Duplicate( const TOOL_EVENT& aEvent )
{
    // Note: original items are no more modified.

    bool increment = aEvent.IsAction( &COMMON_ACTIONS::duplicateIncrement );

    // first, check if we have a selection, or try to get one
    SELECTION_TOOL* selTool = m_toolMgr->GetTool<SELECTION_TOOL>();
    const SELECTION& selection = selTool->GetSelection();

    // Be sure that there is at least one item that we can modify
    if( !hoverSelection() )
        return 0;

    // we have a selection to work on now, so start the tool process
    PCB_BASE_EDIT_FRAME* editFrame = getEditFrame<PCB_BASE_EDIT_FRAME>();

    std::vector<BOARD_ITEM*> old_items;

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

        if( item )
            old_items.push_back( item );
    }

    for( unsigned i = 0; i < old_items.size(); ++i )
    {
        BOARD_ITEM* item = old_items[i];

        // Unselect the item, so we won't pick it up again
        // Do this first, so a single-item duplicate will correctly call
        // SetCurItem and show the item properties
        m_toolMgr->RunAction( COMMON_ACTIONS::unselectItem, true, item );

        BOARD_ITEM* new_item = NULL;

        if( m_editModules )
            new_item = editFrame->GetBoard()->m_Modules->Duplicate( item, increment );
        else
        {
#if 0
            // @TODO: see if we allow zone duplication here
            // Duplicate zones is especially tricky (overlaping zones must be merged)
            // so zones are not duplicated
            if( item->Type() != PCB_ZONE_AREA_T )
#endif
            new_item = editFrame->GetBoard()->Duplicate( item );
        }

        if( new_item )
        {
            m_commit->Add( new_item );

            // Select the new item, so we can pick it up
            m_toolMgr->RunAction( COMMON_ACTIONS::selectItem, true, new_item );
        }
    }

    // record the new items as added
    if( !selection.Empty() )
    {
        editFrame->DisplayToolMsg( wxString::Format( _( "Duplicated %d item(s)" ),
                (int) old_items.size() ) );

        // If items were duplicated, pick them up
        // this works well for "dropping" copies around and pushes the commit
        TOOL_EVENT evt = COMMON_ACTIONS::editActivate.MakeEvent();
        Main( evt );
    }

    return 0;
};

//.........这里部分代码省略.........

    // 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() )
        return 0;

    commit.Push( _( "Append a board" ) );

    // Synchronize layers
    // we should not ask PLUGINs to do these items:
    int copperLayerCount = board->GetCopperLayerCount();

    if( copperLayerCount > initialCopperLayerCount )
        board->SetCopperLayerCount( copperLayerCount );

    // Enable all used layers, and make them visible:
    LSET enabledLayers = board->GetEnabledLayers();
    enabledLayers |= initialEnabledLayers;
    board->SetEnabledLayers( enabledLayers );
    board->SetVisibleLayers( enabledLayers );
    editFrame->ReCreateLayerBox();
    editFrame->ReFillLayerWidget();
    static_cast<PCB_DRAW_PANEL_GAL*>( editFrame->GetGalCanvas() )->SyncLayersVisibility( board );

    // Ratsnest
    board->BuildListOfNets();
    board->SynchronizeNetsAndNetClasses();
    board->GetRatsnest()->ProcessBoard();

    // Start dragging the appended board
    SELECTION_TOOL* selectionTool = m_toolMgr->GetTool<SELECTION_TOOL>();
    const SELECTION& selection = selectionTool->GetSelection();
    VECTOR2D v( selection.Item<BOARD_ITEM>( 0 )->GetPosition() );
    getViewControls()->WarpCursor( v, true, true );
    m_toolMgr->InvokeTool( "pcbnew.InteractiveEdit" );

    return 0;
}

int EDIT_TOOL::CreateArray( const TOOL_EVENT& aEvent )
{
    // first, check if we have a selection, or try to get one
    SELECTION_TOOL* selTool = m_toolMgr->GetTool<SELECTION_TOOL>();
    const SELECTION& selection = selTool->GetSelection();

    // Be sure that there is at least one item that we can modify
    if( !hoverSelection( selection ) )
        return 0;

    bool originalItemsModified = false;

    // we have a selection to work on now, so start the tool process

    PCB_BASE_FRAME* editFrame = getEditFrame<PCB_BASE_FRAME>();
    editFrame->OnModify();

    if( m_editModules )
    {
        // Module editors do their undo point upfront for the whole module
        editFrame->SaveCopyInUndoList( editFrame->GetBoard()->m_Modules, UR_MODEDIT );
    }
    else
    {
        // We may also change the original item
        editFrame->SaveCopyInUndoList( selection.items, UR_CHANGED );
    }

    DIALOG_CREATE_ARRAY::ARRAY_OPTIONS* array_opts = NULL;

    VECTOR2I rp = selection.GetCenter();
    const wxPoint rotPoint( rp.x, rp.y );

    DIALOG_CREATE_ARRAY dialog( editFrame, rotPoint, &array_opts );
    int ret = dialog.ShowModal();

    if( ret == wxID_OK && array_opts != NULL )
    {
        PICKED_ITEMS_LIST newItemList;

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

            if( !item )
                continue;

            wxString cachedString;

            if( item->Type() == PCB_MODULE_T )
            {
                cachedString = static_cast<MODULE*>( item )->GetReferencePrefix();
            }
            else if( EDA_TEXT* text = dynamic_cast<EDA_TEXT*>( item ) )
            {
                // Copy the text (not just take a reference
                cachedString = text->GetText();
            }

            // iterate across the array, laying out the item at the
            // correct position
            const unsigned nPoints = array_opts->GetArraySize();

            for( unsigned ptN = 0; ptN < nPoints; ++ptN )
            {
                BOARD_ITEM* newItem = NULL;

                if( ptN == 0 )
                    newItem = item;
                else
                {
                    // if renumbering, no need to increment
                    const bool increment = !array_opts->ShouldRenumberItems();

                    // Some items cannot be duplicated
                    // i.e. the ref and value fields of a footprint or zones
                    // therefore newItem can be null

                    if( m_editModules )
                        newItem = editFrame->GetBoard()->m_Modules->DuplicateAndAddItem( item, increment );
                    else
                    {
#if 0
                        // @TODO: see if we allow zone duplication here
                        // Duplicate zones is especially tricky (overlaping zones must be merged)
                        // so zones are not duplicated
                        if( item->Type() == PCB_ZONE_AREA_T )
                            newItem = NULL;
                        else
#endif
                            newItem = editFrame->GetBoard()->DuplicateAndAddItem( item, increment );
                    }

                    if( newItem )
                    {
                        array_opts->TransformItem( ptN, newItem, rotPoint );

                        m_toolMgr->RunAction( COMMON_ACTIONS::unselectItem, true, newItem );

                        newItemList.PushItem( newItem );
//.........这里部分代码省略.........

int EDIT_TOOL::Duplicate( const TOOL_EVENT& aEvent )
{
    bool increment = aEvent.IsAction( &COMMON_ACTIONS::duplicateIncrement );

    // first, check if we have a selection, or try to get one
    SELECTION_TOOL* selTool = m_toolMgr->GetTool<SELECTION_TOOL>();
    const SELECTION& selection = selTool->GetSelection();

    // Be sure that there is at least one item that we can modify
    if( !hoverSelection( selection ) )
        return 0;

    // we have a selection to work on now, so start the tool process

    PCB_BASE_FRAME* editFrame = getEditFrame<PCB_BASE_FRAME>();
    editFrame->OnModify();

    // prevent other tools making undo points while the duplicate is going on
    // so that if you cancel, you don't get a duplicate object hiding over
    // the original
    incUndoInhibit();

    if( m_editModules )
        editFrame->SaveCopyInUndoList( editFrame->GetBoard()->m_Modules, UR_MODEDIT );

    std::vector<BOARD_ITEM*> old_items;

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

        if( item )
            old_items.push_back( item );
    }

    for( unsigned i = 0; i < old_items.size(); ++i )
    {
        BOARD_ITEM* item = old_items[i];

        // Unselect the item, so we won't pick it up again
        // Do this first, so a single-item duplicate will correctly call
        // SetCurItem and show the item properties
        m_toolMgr->RunAction( COMMON_ACTIONS::unselectItem, true, item );

        BOARD_ITEM* new_item = NULL;

        if( m_editModules )
            new_item = editFrame->GetBoard()->m_Modules->DuplicateAndAddItem( item, increment );
        else
        {
#if 0
            // @TODO: see if we allow zone duplication here
            // Duplicate zones is especially tricky (overlaping zones must be merged)
            // so zones are not duplicated
            if( item->Type() != PCB_ZONE_AREA_T )
#endif
                new_item = editFrame->GetBoard()->DuplicateAndAddItem( item, increment );
        }

        if( new_item )
        {
            if( new_item->Type() == PCB_MODULE_T )
            {
                static_cast<MODULE*>( new_item )->RunOnChildren( boost::bind( &KIGFX::VIEW::Add,
                        getView(), _1 ) );
            }

            editFrame->GetGalCanvas()->GetView()->Add( new_item );

            // Select the new item, so we can pick it up
            m_toolMgr->RunAction( COMMON_ACTIONS::selectItem, true, new_item );
        }
    }

    // record the new items as added
    if( !m_editModules )
        editFrame->SaveCopyInUndoList( selection.items, UR_NEW );

    editFrame->DisplayToolMsg( wxString::Format( _( "Duplicated %d item(s)" ),
                               (int) old_items.size() ) );

    // pick up the selected item(s) and start moving
    // this works well for "dropping" copies around
    TOOL_EVENT evt = COMMON_ACTIONS::editActivate.MakeEvent();
    Main( evt );

    // and re-enable undos
    decUndoInhibit();

    return 0;
}