C++ SCH_ITEM::GetFlags方法代码示例

void SCH_EDIT_FRAME::OrientComponent( COMPONENT_ORIENTATION_T aOrientation )
{
    SCH_SCREEN* screen = GetScreen();
    SCH_ITEM* item = screen->GetCurItem();

    wxCHECK_RET( item != NULL && item->Type() == SCH_COMPONENT_T,
                 wxT( "Cannot change orientation of invalid schematic item." ) );

    SCH_COMPONENT* component = (SCH_COMPONENT*) item;

    m_canvas->MoveCursorToCrossHair();

    if( item->GetFlags() == 0 )
        SetUndoItem( item );

    INSTALL_UNBUFFERED_DC( dc, m_canvas );

    component->SetOrientation( aOrientation );

    m_canvas->CrossHairOn( &dc );

    if( item->GetFlags() == 0 )
    {
        addCurrentItemToList();
        SchematicCleanUp( true );
    }

    if( GetScreen()->TestDanglingEnds() )
        m_canvas->Refresh();

    OnModify();
}

void SCH_EDIT_FRAME::OrientComponent( COMPONENT_ORIENTATION_T aOrientation )
{
    SCH_SCREEN*    screen = GetScreen();
    SCH_ITEM*      item = screen->GetCurItem();
    SCH_COMPONENT* component = (SCH_COMPONENT*) item;

    GetCanvas()->MoveCursorToCrossHair();

    if( item->GetFlags() == 0 )
        SetUndoItem( item );

    component->SetOrientation( aOrientation );

    m_canvas->CrossHairOn( );

    if( item->GetFlags() == 0 )
    {
        addCurrentItemToScreen();
        SchematicCleanUp();
    }

    TestDanglingEnds();

    RefreshItem( item );

    if( item->GetFlags() == 0 )
        OnModify();
}

bool SCH_SCREEN::SchematicCleanUp()
{
    bool      modified = false;

    for( SCH_ITEM* item = m_drawList.begin() ; item; item = item->Next() )
    {
        if( ( item->Type() != SCH_LINE_T ) && ( item->Type() != SCH_JUNCTION_T ) )
            continue;

        bool restart;

        for( SCH_ITEM* testItem = item->Next(); testItem; testItem = restart ? m_drawList.begin() : testItem->Next() )
        {
            restart = false;

            if( ( item->Type() == SCH_LINE_T ) && ( testItem->Type() == SCH_LINE_T ) )
            {
                SCH_LINE* line = (SCH_LINE*) item;

                if( line->MergeOverlap( (SCH_LINE*) testItem ) )
                {
                    // Keep the current flags, because the deleted segment can be flagged.
                    item->SetFlags( testItem->GetFlags() );
                    DeleteItem( testItem );
                    restart = true;
                    modified = true;
                }
            }
            else if ( ( ( item->Type() == SCH_JUNCTION_T )
                      && ( testItem->Type() == SCH_JUNCTION_T ) ) && ( testItem != item ) )
            {
                if ( testItem->HitTest( item->GetPosition() ) )
                {
                    // Keep the current flags, because the deleted segment can be flagged.
                    item->SetFlags( testItem->GetFlags() );
                    DeleteItem( testItem );
                    restart = true;
                    modified = true;
                }
            }
        }
    }

    TestDanglingEnds();

    return modified;
}

void SCH_SCREEN::addConnectedItemsToBlock( const wxPoint& position )
{
    SCH_ITEM* item;
    ITEM_PICKER picker;
    bool addinlist = true;

    for( item = m_drawList.begin(); item; item = item->Next() )
    {
        picker.SetItem( item );

        if( !item->IsConnectable() || !item->IsConnected( position )
            || (item->GetFlags() & SKIP_STRUCT) )
            continue;

        if( item->IsSelected() && item->Type() != SCH_LINE_T )
            continue;

        // A line having 2 ends, it can be tested twice: one time per end
        if( item->Type() == SCH_LINE_T )
        {
            if( ! item->IsSelected() )      // First time this line is tested
                item->SetFlags( SELECTED | STARTPOINT | ENDPOINT );
            else      // second time (or more) this line is tested
                addinlist = false;

            SCH_LINE* line = (SCH_LINE*) item;

            if( line->GetStartPoint() == position )
                item->ClearFlags( STARTPOINT );
            else if( line->GetEndPoint() == position )
                item->ClearFlags( ENDPOINT );
        }
        else
            item->SetFlags( SELECTED );

        if( addinlist )
        {
            picker.SetFlags( item->GetFlags() );
            m_BlockLocate.GetItems().PushItem( picker );
        }
    }
}

void SCH_EDIT_FRAME::DeleteItemsInList( PICKED_ITEMS_LIST& aItemsList, bool aAppend )
{
    PICKED_ITEMS_LIST  itemsList;

    for( unsigned ii = 0; ii < aItemsList.GetCount(); ii++ )
    {
        SCH_ITEM* item = (SCH_ITEM*) aItemsList.GetPickedItem( ii );
        ITEM_PICKER itemWrapper( item, UR_DELETED );

        if( item->GetFlags() & STRUCT_DELETED )
            continue;

        DeleteItem( item, aAppend );
        aAppend = true;
    }

    GetScreen()->ClearDrawingState();
}

void SCH_EDIT_FRAME::OnOpenLibraryEditor( wxCommandEvent& event )
{
    SCH_COMPONENT* component = NULL;

    if( event.GetId() == ID_POPUP_SCH_CALL_LIBEDIT_AND_LOAD_CMP )
    {
        SCH_ITEM* item = GetScreen()->GetCurItem();

        if( (item == NULL) || (item->GetFlags() != 0) || ( item->Type() != SCH_COMPONENT_T ) )
        {
            wxMessageBox( _("Error: not a component or no component" ) );
            return;
        }

        component = (SCH_COMPONENT*) item;
    }

    LIB_EDIT_FRAME* libeditFrame = LIB_EDIT_FRAME::GetActiveLibraryEditor();;
    if( libeditFrame )
    {
        if( libeditFrame->IsIconized() )
             libeditFrame->Iconize( false );

        libeditFrame->Raise();
    }
    else
    {
        wxWindow* w = Kiface().CreateWindow( this, LIBEDITOR_FRAME_TYPE, &Kiway() );
        libeditFrame = dynamic_cast<LIB_EDIT_FRAME*>( w );
    }

    if( component )
    {
        LIB_ALIAS* entry = CMP_LIBRARY::FindLibraryEntry( component->GetLibName() );

        if( entry == NULL )     // Should not occur
            return;

        CMP_LIBRARY* library = entry->GetLibrary();
        libeditFrame->LoadComponentAndSelectLib( entry, library );
    }
}

void SCH_SCREEN::MarkConnections( SCH_LINE* aSegment )
{
    wxCHECK_RET( (aSegment) && (aSegment->Type() == SCH_LINE_T),
                 wxT( "Invalid object pointer." ) );

    for( SCH_ITEM* item = m_drawList.begin(); item; item = item->Next() )
    {
        if( item->GetFlags() & CANDIDATE )
            continue;

        if( item->Type() == SCH_JUNCTION_T )
        {
            SCH_JUNCTION* junction = (SCH_JUNCTION*) item;

            if( aSegment->IsEndPoint( junction->GetPosition() ) )
                item->SetFlags( CANDIDATE );

            continue;
        }

        if( item->Type() != SCH_LINE_T )
            continue;

        SCH_LINE* segment = (SCH_LINE*) item;

        if( aSegment->IsEndPoint( segment->GetStartPoint() )
            && !GetPin( segment->GetStartPoint(), NULL, true ) )
        {
            item->SetFlags( CANDIDATE );
            MarkConnections( segment );
        }

        if( aSegment->IsEndPoint( segment->GetEndPoint() )
            && !GetPin( segment->GetEndPoint(), NULL, true ) )
        {
            item->SetFlags( CANDIDATE );
            MarkConnections( segment );
        }
    }
}

bool SCH_EDIT_FRAME::OnRightClick( const wxPoint& aPosition, wxMenu* PopMenu )
{
    SCH_ITEM*   item = GetScreen()->GetCurItem();
    bool        blockActive = GetScreen()->IsBlockActive();
    wxString    msg;

    // Do not start a block command  on context menu.
    m_canvas->SetCanStartBlock( -1 );

    if( blockActive )
    {
        AddMenusForBlock( PopMenu, this );
        PopMenu->AppendSeparator();

        // If we have a block containing only one main element
        // we append its edition submenu
        if( item != NULL )
        {
            switch( item->Type() )
            {
            case SCH_COMPONENT_T:
                AddMenusForEditComponent( PopMenu, (SCH_COMPONENT *) item, Prj().SchLibs() );
                PopMenu->AppendSeparator();
                break;

            case SCH_TEXT_T:
                msg = AddHotkeyName( _( "Edit Text" ), g_Schematic_Hokeys_Descr, HK_EDIT );
                AddMenuItem( PopMenu, ID_SCH_EDIT_ITEM, msg, KiBitmap( edit_text_xpm ) );
                PopMenu->AppendSeparator();
                break;

            case SCH_LABEL_T:
                msg = AddHotkeyName( _( "Edit Label" ), g_Schematic_Hokeys_Descr, HK_EDIT );
                AddMenuItem( PopMenu, ID_SCH_EDIT_ITEM, msg, KiBitmap( edit_text_xpm ) );
                PopMenu->AppendSeparator();
                break;

            case SCH_GLOBAL_LABEL_T:
                msg = AddHotkeyName( _( "Edit Global Label" ), g_Schematic_Hokeys_Descr,
                                     HK_EDIT );
                AddMenuItem( PopMenu, ID_SCH_EDIT_ITEM, msg, KiBitmap( edit_text_xpm ) );
                PopMenu->AppendSeparator();
                break;

            case SCH_HIERARCHICAL_LABEL_T:
                msg = AddHotkeyName( _( "Edit Hierarchical Label" ), g_Schematic_Hokeys_Descr,
                                     HK_EDIT );
                AddMenuItem( PopMenu, ID_SCH_EDIT_ITEM, msg, KiBitmap( edit_text_xpm ) );
                PopMenu->AppendSeparator();
                break;

            case SCH_BITMAP_T:
                msg = AddHotkeyName( _( "Edit Image" ), g_Schematic_Hokeys_Descr, HK_EDIT );
                AddMenuItem( PopMenu, ID_SCH_EDIT_ITEM, msg, KiBitmap( image_xpm ) );
                PopMenu->AppendSeparator();
                break;

            default:
                break;
            }
        }
        return true;
    }

    // Try to locate items at cursor position.
    if( (item == NULL) || (item->GetFlags() == 0) )
    {
        item = LocateAndShowItem( aPosition, SCH_COLLECTOR::AllItemsButPins );

        // If the clarify item selection context menu is aborted, don't show the context menu.
        if( item == NULL && m_canvas->GetAbortRequest() )
        {
            m_canvas->SetAbortRequest( false );
            return false;
        }
    }

    // If a command is in progress: add "cancel" and "end tool" menu
    // If
    if( GetToolId() != ID_NO_TOOL_SELECTED )
    {
        if( item && item->GetFlags() )
        {
            AddMenuItem( PopMenu, ID_CANCEL_CURRENT_COMMAND, _( "Cancel" ),
                         KiBitmap( cancel_xpm ) );
        }
        else
        {
            AddMenuItem( PopMenu, ID_CANCEL_CURRENT_COMMAND, _( "End Tool" ),
                         KiBitmap( cursor_xpm ) );
        }

        PopMenu->AppendSeparator();

        switch( GetToolId() )
        {
        case ID_WIRE_BUTT:
            AddMenusForWire( PopMenu, NULL, this );
            if( item == NULL )
                PopMenu->AppendSeparator();
//.........这里部分代码省略.........

void SCH_SCREEN::SelectBlockItems()
{
    PICKED_ITEMS_LIST* pickedlist = &m_BlockLocate.GetItems();

    if( pickedlist->GetCount() == 0 )
        return;

    ClearDrawingState();

    for( unsigned ii = 0; ii < pickedlist->GetCount(); ii++ )
    {
        SCH_ITEM* item = (SCH_ITEM*) pickedlist->GetPickedItem( ii );
        item->SetFlags( SELECTED );
    }

    if( !m_BlockLocate.IsDragging() )
        return;

    // Select all the items in the screen connected to the items in the block.
    // be sure end lines that are on the block limits are seen inside this block
    m_BlockLocate.Inflate( 1 );
    unsigned last_select_id = pickedlist->GetCount();

    for( unsigned ii = 0; ii < last_select_id; ii++ )
    {
        SCH_ITEM* item = (SCH_ITEM*)pickedlist->GetPickedItem( ii );
        item->SetFlags( IS_DRAGGED );

        if( item->Type() == SCH_LINE_T )
        {
            item->IsSelectStateChanged( m_BlockLocate );

            if( !item->IsSelected() )
            {   // This is a special case:
                // this selected wire has no ends in block.
                // But it was selected (because it intersects the selecting area),
                // so we must keep it selected and select items connected to it
                // Note: an other option could be: remove it from drag list
                item->SetFlags( SELECTED | SKIP_STRUCT );
                std::vector< wxPoint > connections;
                item->GetConnectionPoints( connections );

                for( size_t i = 0; i < connections.size(); i++ )
                    addConnectedItemsToBlock( connections[i] );
            }

            pickedlist->SetPickerFlags( item->GetFlags(), ii );
        }
        else if( item->IsConnectable() )
        {
            std::vector< wxPoint > connections;

            item->GetConnectionPoints( connections );

            for( size_t jj = 0; jj < connections.size(); jj++ )
                addConnectedItemsToBlock( connections[jj] );
        }
    }

    m_BlockLocate.Inflate( -1 );
}

void SCH_EDIT_FRAME::OnDragItem( wxCommandEvent& aEvent )
{
    SCH_SCREEN* screen = GetScreen();
    SCH_ITEM* item = screen->GetCurItem();

    // The easiest way to handle a menu or a hot key drag command
    // is to simulate a block drag command
    //
    // When a drag item is requested, some items use a BLOCK_DRAG_ITEM drag type
    // an some items use a BLOCK_DRAG drag type  (mainly a junction)
    // a BLOCK_DRAG collects all items in a block (here a 2x2 rect centered on the cursor)
    // and BLOCK_DRAG_ITEM drag only the selected item
    BLOCK_COMMAND_T dragType = BLOCK_DRAG_ITEM;

    if( item == NULL )
    {
        // If we didn't get here by a hot key, then something has gone wrong.
        if( aEvent.GetInt() == 0 )
            return;

        EDA_HOTKEY_CLIENT_DATA* data = (EDA_HOTKEY_CLIENT_DATA*) aEvent.GetClientObject();

        wxCHECK_RET( data != NULL, wxT( "Invalid hot key client object." ) );

        item = LocateAndShowItem( data->GetPosition(), SCH_COLLECTOR::DraggableItems,
                                  aEvent.GetInt() );

        // Exit if no item found at the current location or the item is already being edited.
        if( (item == NULL) || (item->GetFlags() != 0) )
            return;

        // When a junction or a node is found, a BLOCK_DRAG is better
        if( m_collectedItems.IsCorner() || m_collectedItems.IsNode( false )
            || m_collectedItems.IsDraggableJunction() )
            dragType = BLOCK_DRAG;
    }

    switch( item->Type() )
    {
    case SCH_BUS_BUS_ENTRY_T:
    case SCH_BUS_WIRE_ENTRY_T:
    case SCH_LINE_T:
    case SCH_JUNCTION_T:
    case SCH_COMPONENT_T:
    case SCH_LABEL_T:
    case SCH_GLOBAL_LABEL_T:
    case SCH_HIERARCHICAL_LABEL_T:
    case SCH_SHEET_T:
        m_canvas->MoveCursorToCrossHair();

        if( screen->m_BlockLocate.GetState() == STATE_NO_BLOCK )
        {
            INSTALL_UNBUFFERED_DC( dc, m_canvas );

            if( !HandleBlockBegin( &dc, dragType, GetCrossHairPosition() ) )
                break;

            // Give a non null size to the search block:
            screen->m_BlockLocate.Inflate( 1 );
            HandleBlockEnd( &dc );
        }

        break;

    default:
        wxFAIL_MSG( wxString::Format( wxT( "Cannot drag schematic item type %s." ),
                                      GetChars( item->GetClass() ) ) );
    }
}

void SCH_EDIT_FRAME::OnMoveItem( wxCommandEvent& aEvent )
{
    SCH_SCREEN* screen = GetScreen();
    SCH_ITEM*   item = screen->GetCurItem();

    if( screen->m_BlockLocate.GetState() != STATE_NO_BLOCK )
    {
        // trying to move an item when there is a block at the same time is not acceptable
        return;
    }

    if( item == NULL )
    {
        // If we didn't get here by a hot key, then something has gone wrong.
        if( aEvent.GetInt() == 0 )
            return;

        EDA_HOTKEY_CLIENT_DATA* data = (EDA_HOTKEY_CLIENT_DATA*) aEvent.GetClientObject();

        wxCHECK_RET( data != NULL, wxT( "Invalid hot key client object." ) );

        item = LocateAndShowItem( data->GetPosition(), SCH_COLLECTOR::MovableItems,
                                  aEvent.GetInt() );

        // Exit if no item found at the current location or the item is already being edited.
        if( (item == NULL) || (item->GetFlags() != 0) )
            return;
    }

    INSTALL_UNBUFFERED_DC( dc, m_canvas );

    switch( item->Type() )
    {
    case SCH_LINE_T:
        break;

    case SCH_JUNCTION_T:
    case SCH_NO_CONNECT_T:
    case SCH_BUS_BUS_ENTRY_T:
    case SCH_BUS_WIRE_ENTRY_T:
    case SCH_LABEL_T:
    case SCH_GLOBAL_LABEL_T:
    case SCH_HIERARCHICAL_LABEL_T:
    case SCH_TEXT_T:
    case SCH_COMPONENT_T:
    case SCH_SHEET_PIN_T:
    case SCH_FIELD_T:
    case SCH_SHEET_T:
        PrepareMoveItem( item, &dc );
        break;

    case SCH_BITMAP_T:
        // move an image is a special case:
        // we cannot undraw/redraw a bitmap just using our xor mode
        // the MoveImage function handle this undraw/redraw difficulty
        // By redrawing the full bounding box
        MoveImage( (SCH_BITMAP*) item, &dc );
        break;

    case SCH_MARKER_T:
        // Moving a marker has no sense
        break;

    default:
        // Unknown items cannot be moved
        wxFAIL_MSG( wxString::Format(
                    wxT( "Cannot move item type %d" ), item->Type() ) );
        break;
    }

    if( GetToolId() == ID_NO_TOOL_SELECTED )
        SetRepeatItem( NULL );
}

int SCH_SCREEN::GetConnection( const wxPoint& aPosition, PICKED_ITEMS_LIST& aList,
                               bool aFullConnection )
{
    SCH_ITEM* item;
    EDA_ITEM* tmp;
    EDA_ITEMS list;

    // Clear flags member for all items.
    ClearDrawingState();
    BreakSegmentsOnJunctions();

    if( GetNode( aPosition, list ) == 0 )
        return 0;

    for( size_t i = 0;  i < list.size();  i++ )
    {
        item = (SCH_ITEM*) list[ i ];
        item->SetFlags( SELECTEDNODE | STRUCT_DELETED );

        /* Put this structure in the picked list: */
        ITEM_PICKER picker( item, UR_DELETED );
        aList.PushItem( picker );
    }

    // Mark all wires, junctions, .. connected to the item(s) found.
    if( aFullConnection )
    {
        SCH_LINE* segment;

        for( item = m_drawList.begin(); item; item = item->Next() )
        {
            if( !(item->GetFlags() & SELECTEDNODE) )
                continue;

            if( item->Type() != SCH_LINE_T )
                continue;

            MarkConnections( (SCH_LINE*) item );
        }

        // Search all attached wires (i.e wire with one new dangling end )
        for( item = m_drawList.begin(); item; item = item->Next() )
        {
            bool noconnect = false;

            if( item->GetFlags() & STRUCT_DELETED )
                continue;                                   // Already seen

            if( !(item->GetFlags() & CANDIDATE) )
                continue;                                   // not a candidate

            if( item->Type() != SCH_LINE_T )
                continue;

            item->SetFlags( SKIP_STRUCT );

            segment = (SCH_LINE*) item;

            /* If the wire start point is connected to a wire that was already found
             * and now is not connected, add the wire to the list. */
            for( tmp = m_drawList.begin(); tmp; tmp = tmp->Next() )
            {
                // Ensure tmp is a previously deleted segment:
                if( ( tmp->GetFlags() & STRUCT_DELETED ) == 0 )
                    continue;

                if( tmp->Type() != SCH_LINE_T )
                    continue;

                SCH_LINE* testSegment = (SCH_LINE*) tmp;

               // Test for segment connected to the previously deleted segment:
                if( testSegment->IsEndPoint( segment->GetStartPoint() ) )
                    break;
            }

            // when tmp != NULL, segment is a new candidate:
            // put it in deleted list if
            // the start point is not connected to an other item (like pin)
            if( tmp && !CountConnectedItems( segment->GetStartPoint(), true ) )
                noconnect = true;

            /* If the wire end point is connected to a wire that has already been found
             * and now is not connected, add the wire to the list. */
            for( tmp = m_drawList.begin(); tmp; tmp = tmp->Next() )
            {
                // Ensure tmp is a previously deleted segment:
                if( ( tmp->GetFlags() & STRUCT_DELETED ) == 0 )
                    continue;

                if( tmp->Type() != SCH_LINE_T )
                    continue;

                SCH_LINE* testSegment = (SCH_LINE*) tmp;

                // Test for segment connected to the previously deleted segment:
                if( testSegment->IsEndPoint( segment->GetEndPoint() ) )
                    break;
            }

//.........这里部分代码省略.........

void SCH_EDIT_FRAME::OnOrient( wxCommandEvent& aEvent )
{
    SCH_SCREEN* screen = GetScreen();
    SCH_ITEM*   item   = screen->GetCurItem();

    INSTALL_UNBUFFERED_DC( dc, m_canvas );

    // Allows block rotate operation on hot key.
    if( screen->m_BlockLocate.GetState() != STATE_NO_BLOCK )
    {
        if( aEvent.GetId() == ID_SCH_MIRROR_X )
        {
            m_canvas->MoveCursorToCrossHair();
            screen->m_BlockLocate.SetMessageBlock( this );
            screen->m_BlockLocate.SetCommand( BLOCK_MIRROR_X );
            HandleBlockEnd( &dc );
        }
        else if( aEvent.GetId() == ID_SCH_MIRROR_Y )
        {
            m_canvas->MoveCursorToCrossHair();
            screen->m_BlockLocate.SetMessageBlock( this );
            screen->m_BlockLocate.SetCommand( BLOCK_MIRROR_Y );
            HandleBlockEnd( &dc );
        }
        else
        {
            wxFAIL_MSG( wxT( "Unknown block oriention command ID." ) );
        }

        return;
    }

    if( item == NULL )
    {
        // If we didn't get here by a hot key, then something has gone wrong.
        if( aEvent.GetInt() == 0 )
            return;

        EDA_HOTKEY_CLIENT_DATA* data = (EDA_HOTKEY_CLIENT_DATA*) aEvent.GetClientObject();

        wxCHECK_RET( data != NULL, wxT( "Invalid hot key client object." ) );

        item = LocateAndShowItem( data->GetPosition(), SCH_COLLECTOR::OrientableItems,
                                  aEvent.GetInt() );

        // Exit if no item found at the current location or the item is already being edited.
        if( (item == NULL) || (item->GetFlags() != 0) )
            return;
    }


    switch( item->Type() )
    {
    case SCH_COMPONENT_T:
        if( aEvent.GetId() == ID_SCH_MIRROR_X )
            OrientComponent( CMP_MIRROR_X );
        else if( aEvent.GetId() == ID_SCH_MIRROR_Y )
            OrientComponent( CMP_MIRROR_Y );
        else if( aEvent.GetId() == ID_SCH_ORIENT_NORMAL )
            OrientComponent( CMP_NORMAL );
        else
            wxFAIL_MSG( wxT( "Invalid orient schematic component command ID." ) );

        break;

    case SCH_BITMAP_T:
        if( aEvent.GetId() == ID_SCH_MIRROR_X )
            MirrorImage( (SCH_BITMAP*) item, true );
        else if( aEvent.GetId() == ID_SCH_MIRROR_Y )
            MirrorImage( (SCH_BITMAP*) item, false );

        break;

    default:
        wxFAIL_MSG( wxString::Format( wxT( "Schematic object type %s cannot be oriented." ),
                                      GetChars( item->GetClass() ) ) );
    }

    if( item->GetFlags() == 0 )
        screen->SetCurItem( NULL );
}

void SCH_EDIT_FRAME::OnRotate( wxCommandEvent& aEvent )
{
    SCH_SCREEN* screen = GetScreen();
    SCH_ITEM*   item = screen->GetCurItem();

    INSTALL_UNBUFFERED_DC( dc, m_canvas );

    // Allows block rotate operation on hot key.
    if( screen->m_BlockLocate.GetState() != STATE_NO_BLOCK )
    {
        screen->m_BlockLocate.SetCommand( BLOCK_ROTATE );
        HandleBlockEnd( &dc );
        return;
    }

    if( item == NULL )
    {
        // If we didn't get here by a hot key, then something has gone wrong.
        if( aEvent.GetInt() == 0 )
            return;

        EDA_HOTKEY_CLIENT_DATA* data = (EDA_HOTKEY_CLIENT_DATA*) aEvent.GetClientObject();

        wxCHECK_RET( data != NULL, wxT( "Invalid hot key client object." ) );

        item = LocateAndShowItem( data->GetPosition(), SCH_COLLECTOR::RotatableItems,
                                  aEvent.GetInt() );

        // Exit if no item found at the current location or the item is already being edited.
        if( (item == NULL) || (item->GetFlags() != 0) )
            return;
    }

    switch( item->Type() )
    {
    case SCH_COMPONENT_T:
        {
            SCH_COMPONENT* component = static_cast<SCH_COMPONENT*>( item );
            if( aEvent.GetId() == ID_SCH_ROTATE_CLOCKWISE )
                OrientComponent( CMP_ROTATE_CLOCKWISE );
            else if( aEvent.GetId() == ID_SCH_ROTATE_COUNTERCLOCKWISE )
                OrientComponent( CMP_ROTATE_COUNTERCLOCKWISE );
            else
                wxFAIL_MSG( wxT( "Unknown rotate item command ID." ) );

            if( m_autoplaceFields )
                component->AutoAutoplaceFields( GetScreen() );

            m_canvas->Refresh();

            break;
        }

    case SCH_TEXT_T:
    case SCH_LABEL_T:
    case SCH_GLOBAL_LABEL_T:
    case SCH_HIERARCHICAL_LABEL_T:
        m_canvas->MoveCursorToCrossHair();
        ChangeTextOrient( (SCH_TEXT*) item );
        m_canvas->Refresh();
        break;

    case SCH_FIELD_T:
        m_canvas->MoveCursorToCrossHair();
        RotateField( (SCH_FIELD*) item );
        if( item->GetParent()->Type() == SCH_COMPONENT_T )
        {
            // Now that we're moving a field, they're no longer autoplaced.
            SCH_COMPONENT *parent = static_cast<SCH_COMPONENT*>( item->GetParent() );
            parent->ClearFieldsAutoplaced();
        }
        m_canvas->Refresh();
        break;

    case SCH_BITMAP_T:
        RotateImage( (SCH_BITMAP*) item );
        break;

    case SCH_SHEET_T:
        if( !item->IsNew() )    // rotate a sheet during its creation has no sense
        {
            bool retCCW = ( aEvent.GetId() == ID_SCH_ROTATE_COUNTERCLOCKWISE );
            RotateHierarchicalSheet( static_cast<SCH_SHEET*>( item ), retCCW );
        }

        break;

    case SCH_JUNCTION_T:
    case SCH_NO_CONNECT_T:
        // these items are not rotated, because rotation does not change them.
        break;

    default:
        // Other items (wires...) cannot be rotated, at least during creation
        if( item->IsNew() )
            break;

        wxFAIL_MSG( wxString::Format( wxT( "Cannot rotate schematic item type %s." ),
                                      GetChars( item->GetClass() ) ) );
    }
//.........这里部分代码省略.........

void SCH_EDIT_FRAME::OnEditItem( wxCommandEvent& aEvent )
{
    SCH_SCREEN* screen = GetScreen();
    SCH_ITEM* item = screen->GetCurItem();

    INSTALL_UNBUFFERED_DC( dc, m_canvas );

    if( item == NULL )
    {
        // If we didn't get here by a hot key, then something has gone wrong.
        if( aEvent.GetInt() == 0 )
            return;

        EDA_HOTKEY_CLIENT_DATA* data = (EDA_HOTKEY_CLIENT_DATA*) aEvent.GetClientObject();

        wxCHECK_RET( data != NULL, wxT( "Invalid hot key client object." ) );

        // Set the locat filter, according to the edit command
        const KICAD_T* filterList = SCH_COLLECTOR::EditableItems;
        const KICAD_T* filterListAux = NULL;

        switch( aEvent.GetId() )
        {
        case ID_SCH_EDIT_COMPONENT_REFERENCE:
            filterList = SCH_COLLECTOR::CmpFieldReferenceOnly;
            filterListAux = SCH_COLLECTOR::ComponentsOnly;
            break;

        case ID_SCH_EDIT_COMPONENT_VALUE:
            filterList = SCH_COLLECTOR::CmpFieldValueOnly;
            filterListAux = SCH_COLLECTOR::ComponentsOnly;
            break;

        case ID_SCH_EDIT_COMPONENT_FOOTPRINT:
            filterList = SCH_COLLECTOR::CmpFieldFootprintOnly;
            filterListAux = SCH_COLLECTOR::ComponentsOnly;
            break;

        default:
            break;
        }

        item = LocateAndShowItem( data->GetPosition(), filterList, aEvent.GetInt() );

        // If no item found, and if an auxiliary filter exists, try to use it
        if( !item && filterListAux )
            item = LocateAndShowItem( data->GetPosition(), filterListAux, aEvent.GetInt() );

        // Exit if no item found at the current location or the item is already being edited.
        if( (item == NULL) || (item->GetFlags() != 0) )
            return;
    }

    switch( item->Type() )
    {
    case SCH_COMPONENT_T:
    {
        switch( aEvent.GetId() )
        {
        case ID_SCH_EDIT_COMPONENT_REFERENCE:
            EditComponentFieldText( ( (SCH_COMPONENT*) item )->GetField( REFERENCE ) );
            break;

        case ID_SCH_EDIT_COMPONENT_VALUE:
            EditComponentFieldText( ( (SCH_COMPONENT*) item )->GetField( VALUE ) );
            break;

        case ID_SCH_EDIT_COMPONENT_FOOTPRINT:
            EditComponentFieldText( ( (SCH_COMPONENT*) item )->GetField( FOOTPRINT ) );
            break;

        case ID_SCH_EDIT_ITEM:
            EditComponent( (SCH_COMPONENT*) item );
            break;

        default:
            wxFAIL_MSG( wxString::Format( wxT( "Invalid schematic component edit command ID %d" ),
                                          aEvent.GetId() ) );
        }

        break;
    }

    case SCH_SHEET_T:
        EditSheet( (SCH_SHEET*) item, &dc );
        break;

    case SCH_SHEET_PIN_T:
        EditSheetPin( (SCH_SHEET_PIN*) item, &dc );
        break;

    case SCH_TEXT_T:
    case SCH_LABEL_T:
    case SCH_GLOBAL_LABEL_T:
    case SCH_HIERARCHICAL_LABEL_T:
        EditSchematicText( (SCH_TEXT*) item );
        break;

    case SCH_FIELD_T:
        EditComponentFieldText( (SCH_FIELD*) item );
//.........这里部分代码省略.........