C++ SCH_ITEM::HitTest方法代码示例

int SCH_SCREEN::UpdatePickList()
{
    ITEM_PICKER picker;
    EDA_RECT area;
    unsigned count;

    area.SetOrigin( m_BlockLocate.GetOrigin() );
    area.SetSize( m_BlockLocate.GetSize() );
    area.Normalize();

    for( SCH_ITEM* item = m_drawList.begin(); item; item = item->Next() )
    {
        // An item is picked if its bounding box intersects the reference area.
        if( item->HitTest( area ) )
        {
            picker.SetItem( item );
            m_BlockLocate.PushItem( picker );
        }
    }

    // if the block is composed of one item,
    // select it as the current item
    count =  m_BlockLocate.GetCount();
    if( count == 1 )
    {
        SetCurItem( (SCH_ITEM*) m_BlockLocate.GetItem( 0 ) );
    }
    else
    {
        SetCurItem( NULL );
    }

    return count;
}

SCH_LINE* SCH_SCREEN::GetLine( const wxPoint& aPosition, int aAccuracy, int aLayer,
                               SCH_LINE_TEST_T aSearchType )
{
    for( SCH_ITEM* item = m_drawList.begin(); item; item = item->Next() )
    {
        if( item->Type() != SCH_LINE_T )
            continue;

        if( item->GetLayer() != aLayer )
            continue;

        if( !item->HitTest( aPosition, aAccuracy ) )
            continue;

        switch( aSearchType )
        {
        case ENTIRE_LENGTH_T:
            return (SCH_LINE*) item;

        case EXCLUDE_END_POINTS_T:
            if( !( (SCH_LINE*) item )->IsEndPoint( aPosition ) )
                return (SCH_LINE*) item;
            break;

        case END_POINTS_ONLY_T:
            if( ( (SCH_LINE*) item )->IsEndPoint( aPosition ) )
                return (SCH_LINE*) item;
        }
    }

    return NULL;
}

int SCH_SCREEN::GetNode( const wxPoint& aPosition, EDA_ITEMS& aList )
{
    for( SCH_ITEM* item = m_drawList.begin(); item; item = item->Next() )
    {
        if( item->Type() == SCH_LINE_T && item->HitTest( aPosition )
            && (item->GetLayer() == LAYER_BUS || item->GetLayer() == LAYER_WIRE) )
        {
            aList.push_back( item );
        }
        else if( item->Type() == SCH_JUNCTION_T && item->HitTest( aPosition ) )
        {
            aList.push_back( item );
        }
    }

    return (int) aList.size();
}

SCH_LINE* SCH_SCREEN::GetWireOrBus( const wxPoint& aPosition )
{
    for( SCH_ITEM* item = m_drawList.begin(); item; item = item->Next() )
    {
        if( (item->Type() == SCH_LINE_T) && item->HitTest( aPosition )
            && (item->GetLayer() == LAYER_BUS || item->GetLayer() == LAYER_WIRE) )
        {
            return (SCH_LINE*) item;
        }
    }

    return NULL;
}

SCH_ITEM* SCH_SCREEN::GetItem( const wxPoint& aPosition, int aAccuracy, KICAD_T aType ) const
{
    for( SCH_ITEM* item = m_drawList.begin(); item; item = item->Next() )
    {
        if( item->HitTest( aPosition, aAccuracy ) && (aType == NOT_USED) )
            return item;

        if( (aType == SCH_FIELD_T) && (item->Type() == SCH_COMPONENT_T) )
        {
            SCH_COMPONENT* component = (SCH_COMPONENT*) item;

            for( int i = REFERENCE; i < component->GetFieldCount(); i++ )
            {
                SCH_FIELD* field = component->GetField( i );

                if( field->HitTest( aPosition, aAccuracy ) )
                    return (SCH_ITEM*) field;
            }
        }
        else if( (aType == SCH_SHEET_PIN_T) && (item->Type() == SCH_SHEET_T) )
        {
            SCH_SHEET* sheet = (SCH_SHEET*)item;

            SCH_SHEET_PIN* label = sheet->GetPin( aPosition );

            if( label )
                return (SCH_ITEM*) label;
        }
        else if( (item->Type() == aType) && item->HitTest( aPosition, aAccuracy ) )
        {
            return item;
        }
    }

    return NULL;
}

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;
}

SCH_TEXT* SCH_SCREEN::GetLabel( const wxPoint& aPosition, int aAccuracy )
{
    for( SCH_ITEM* item = m_drawList.begin(); item; item = item->Next() )
    {
        switch( item->Type() )
        {
        case SCH_LABEL_T:
        case SCH_GLOBAL_LABEL_T:
        case SCH_HIERARCHICAL_LABEL_T:
            if( item->HitTest( aPosition, aAccuracy ) )
                return (SCH_TEXT*) item;

        default:
            ;
        }
    }

    return NULL;
}

void SCH_SCREEN::addConnectedItemsToBlock( const SCH_ITEM* aItem, const wxPoint& position )
{
    SCH_ITEM* item;
    ITEM_PICKER picker;

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

        if( !item->IsConnectable() || ( item->GetFlags() & SKIP_STRUCT )
                || !item->CanConnect( aItem ) || item == aItem )
            continue;

        // A line having 2 ends, it can be tested twice: one time per end
        if( item->Type() == SCH_LINE_T )
        {
            SCH_LINE* line = (SCH_LINE*) item;

            if( !item->HitTest( position ) )
                continue;

            // First time through.  Flags set to denote an end that is not moving
            if( !item->IsSelected() )
                item->SetFlags( CANDIDATE | STARTPOINT | ENDPOINT );

            if( line->GetStartPoint() == position )
                item->ClearFlags( STARTPOINT );
            else if( line->GetEndPoint() == position )
                item->ClearFlags( ENDPOINT );
            else
                // This picks up items such as labels that can connect to the middle of a line
                item->ClearFlags( STARTPOINT | ENDPOINT );
        }
        // We want to move a mid-connected label or bus entry when the full line is being moved
        else if( !item->IsSelected()
                && aItem->Type() == SCH_LINE_T
                && !( aItem->GetFlags() & ( ENDPOINT | STARTPOINT ) ) )
        {
            std::vector< wxPoint > connections;
            item->GetConnectionPoints( connections );

            for( auto conn : connections )
            {
                if( aItem->HitTest( conn ) )
                {
                    item->SetFlags( CANDIDATE );
                    break;
                }
            }
        }

        if( item->IsSelected() )
            continue;

        if( ( item->GetFlags() & CANDIDATE ) || item->IsConnected( position ) ) // Deal with all non-line items
        {
            item->ClearFlags( CANDIDATE );
            item->SetFlags( SELECTED );
            picker.SetItem( item );
            picker.SetFlags( item->GetFlags() );
            m_BlockLocate.GetItems().PushItem( picker );
        }
    }
}

bool SCH_SCREEN::IsJunctionNeeded( const wxPoint& aPosition, bool aNew )
{
    bool    has_nonparallel[2] = { false };
    int     end_count[2] = { 0 };
    int     pin_count = 0;

    std::vector<SCH_LINE*> lines[2];

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

        if( aNew && ( item->Type() == SCH_JUNCTION_T ) && ( item->HitTest( aPosition ) ) )
            return false;

        if( ( item->Type() == SCH_LINE_T )
            && ( item->HitTest( aPosition, 0 ) ) )
        {
            if( item->GetLayer() == LAYER_WIRE )
                lines[0].push_back( (SCH_LINE*) item );
            else if( item->GetLayer() == LAYER_BUS )
                lines[1].push_back( (SCH_LINE*) item );
        }

        if( ( item->Type() == SCH_COMPONENT_T )
                && ( item->IsConnected( aPosition ) ) )
            pin_count++;
    }

    for( int i = 0; i < 2; i++ )
    {
        bool removed_overlapping = false;
        end_count[i] = lines[i].size();

        for( auto line = lines[i].begin(); line < lines[i].end(); line++ )
        {
            // Consider ending on a line to be equivalent to two endpoints because
            // we will want to split the line if anything else connects
            if( !(*line)->IsEndPoint( aPosition ) )
                end_count[i]++;

            for( auto second_line = lines[i].end() - 1; second_line > line; second_line-- )
            {
                if( !(*line)->IsParallel( *second_line ) )
                    has_nonparallel[i] = true;
                else if( !removed_overlapping
                         && (*line)->IsSameQuadrant( *second_line, aPosition ) )
                {
                    /**
                     * Overlapping lines that point in the same direction should not be counted
                     * as extra end_points.  We remove the overlapping lines, being careful to only
                     * remove them once.
                     */
                    removed_overlapping = true;
                    end_count[i]--;
                }
            }
        }
    }

    //

    // If there are three or more endpoints
    if( pin_count + end_count[0] > 2 )
        return true;

    // If there is at least one segment that ends on a non-parallel line or
    // junction of two other lines
    if( has_nonparallel[0] && end_count[0] > 2 )
        return true;

    // Check for bus - bus junction requirements
    if( has_nonparallel[1] && end_count[1] > 2 )
        return true;

    return false;
}