C++ EDA_ITEM::IsNew方法代码示例

/**
 * Function OnLeftDClick
 * called on a double click event from the drawpanel mouse handler
 *  if an editable item is found (text, component)
 *      Call the suitable dialog editor.
 *  Id a create command is in progress:
 *      validate and finish the command
 */
void SCH_EDIT_FRAME::OnLeftDClick( wxDC* aDC, const wxPoint& aPosition )

{
    EDA_ITEM* item = GetScreen()->GetCurItem();

    switch( GetToolId() )
    {
    case ID_NO_TOOL_SELECTED:
        if( ( item == NULL ) || ( item->GetFlags() == 0 ) )
        {
            item = LocateAndShowItem( aPosition );
        }

        if( ( item == NULL ) || ( item->GetFlags() != 0 ) )
            break;

        switch( item->Type() )
        {
        case SCH_SHEET_T:
            m_CurrentSheet->push_back( (SCH_SHEET*) item );
            DisplayCurrentSheet();
            break;

        case SCH_COMPONENT_T:
            EditComponent( (SCH_COMPONENT*) item );
            GetCanvas()->MoveCursorToCrossHair();

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

            GetCanvas()->Refresh();
            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_BITMAP_T:
            EditImage( (SCH_BITMAP*) item );
            break;

        case SCH_FIELD_T:
            EditComponentFieldText( (SCH_FIELD*) item );
            GetCanvas()->MoveCursorToCrossHair();
            break;

        case SCH_MARKER_T:
            ( (SCH_MARKER*) item )->DisplayMarkerInfo( this );
            break;

        default:
            break;
        }

        break;

    case ID_BUS_BUTT:
    case ID_WIRE_BUTT:
    case ID_LINE_COMMENT_BUTT:
        if( item && item->IsNew() )
            EndSegment( aDC );

        break;
    }
}

void PCB_EDIT_FRAME::SwitchLayer( wxDC* DC, LAYER_NUM layer )
{
    LAYER_NUM curLayer = getActiveLayer();

    // Check if the specified layer matches the present layer
    if( layer == curLayer )
        return;

    // Copper layers cannot be selected unconditionally; how many
    // of those layers are currently enabled needs to be checked.
    if( IsCopperLayer( layer ) )
    {
        // If only one copper layer is enabled, the only such layer
        // that can be selected to is the "Back" layer (so the
        // selection of any other copper layer is disregarded).
        if( GetBoard()->GetCopperLayerCount() < 2 )
        {
            if( layer != LAYER_N_BACK )
                return;
        }
        // If more than one copper layer is enabled, the "Copper"
        // and "Component" layers can be selected, but the total
        // number of copper layers determines which internal
        // layers are also capable of being selected.
        else
        {
            if( ( layer != LAYER_N_BACK ) && ( layer != LAYER_N_FRONT )
               && ( layer >= GetBoard()->GetCopperLayerCount() - 1 ) )
                return;
        }

        EDA_ITEM* current = GetScreen()->GetCurItem();

        // See if we are drawing a segment; if so, add a via?
        if( GetToolId() == ID_TRACK_BUTT && current != NULL )
        {
            if( current->Type() == PCB_TRACE_T && ( current->IsNew() ) )
            {
                // Want to set the routing layers so that it switches properly -
                // see the implementation of Other_Layer_Route - the working
                // layer is used to 'start' the via and set the layer masks appropriately.
                GetScreen()->m_Route_Layer_TOP    = curLayer;
                GetScreen()->m_Route_Layer_BOTTOM = layer;

                setActiveLayer( curLayer );

                if( Other_Layer_Route( (TRACK*) GetScreen()->GetCurItem(), DC ) )
                {
                    if( DisplayOpt.ContrastModeDisplay )
                        m_canvas->Refresh();
                }

                // if the via was allowed by DRC, then the layer swap has already
                // been done by Other_Layer_Route(). if via not allowed, then
                // return now so assignment to setActiveLayer() below doesn't happen.
                return;
            }
        }
    }

    // Is yet more checking required? E.g. when the layer to be selected
    // is a non-copper layer, or when switching between a copper layer
    // and a non-copper layer, or vice-versa?
    // ...

    setActiveLayer( layer );

    if( DisplayOpt.ContrastModeDisplay )
        m_canvas->Refresh();
}