C++ DLIST::GetCount方法代码示例

/**
 * Mouse capture callback for drawing line segments.
 */
static void DrawSegment( EDA_DRAW_PANEL* aPanel, wxDC* aDC, const wxPoint& aPosition,
                         bool aErase )
{
    SCH_LINE* segment;

    if( s_wires.GetCount() == 0 )
        return;

    segment = (SCH_LINE*) s_wires.begin();
    EDA_COLOR_T color = GetLayerColor( segment->GetLayer() );
    ColorChangeHighlightFlag( &color, !(color & HIGHLIGHT_FLAG) );

    if( aErase )
    {
        while( segment )
        {
            if( !segment->IsNull() )  // Redraw if segment length != 0
                segment->Draw( aPanel, aDC, wxPoint( 0, 0 ), g_XorMode, color );

            segment = segment->Next();
        }
    }

    SCH_EDIT_FRAME* frame = (SCH_EDIT_FRAME*) aPanel->GetParent();

    wxPoint endpos = frame->GetCrossHairPosition();

    if( frame->GetForceHVLines() ) /* Coerce the line to vertical or horizontal one: */
        ComputeBreakPoint( (SCH_LINE*) s_wires.GetLast()->Back(), endpos );
    else
        ( (SCH_LINE*) s_wires.GetLast() )->SetEndPoint( endpos );

    segment = (SCH_LINE*) s_wires.begin();

    while( segment )
    {
        if( !segment->IsNull() )  // Redraw if segment length != 0
            segment->Draw( aPanel, aDC, wxPoint( 0, 0 ), g_XorMode, color );

        segment = segment->Next();
    }
}

void SCH_EDIT_FRAME::EndSegment( wxDC* DC )
{
    SCH_SCREEN* screen = GetScreen();
    SCH_LINE* segment = (SCH_LINE*) screen->GetCurItem();

    if( segment == NULL || segment->Type() != SCH_LINE_T || !segment->IsNew() )
        return;

    // Delete zero length segments and clear item flags.
    SCH_ITEM* item = s_wires.begin();

    while( item )
    {
        item->ClearFlags();

        wxCHECK_RET( item->Type() == SCH_LINE_T, wxT( "Unexpected object type in wire list." ) );

        segment = (SCH_LINE*) item;
        item = item->Next();

        if( segment->IsNull() )
            delete s_wires.Remove( segment );
    }

    if( s_wires.GetCount() == 0 )
        return;

    // Get the last non-null wire (this is the last created segment).
    SetRepeatItem( segment = (SCH_LINE*) s_wires.GetLast() );

    screen->SetCurItem( NULL );
    m_canvas->EndMouseCapture( -1, -1, wxEmptyString, false );

    // store the terminal point of this last segment: a junction could be needed
    // (the last wire could be merged/deleted/modified, and lost)
    wxPoint endpoint = segment->GetEndPoint();

    // store the starting point of this first segment: a junction could be needed
    SCH_LINE* firstsegment = (SCH_LINE*) s_wires.GetFirst();
    wxPoint startPoint = firstsegment->GetStartPoint();

    // Save the old wires for the undo command
    DLIST< SCH_ITEM > oldWires;                     // stores here the old wires
    GetScreen()->ExtractWires( oldWires, true );    // Save them in oldWires list
    // Put the snap shot of the previous wire, buses, and junctions in the undo/redo list.
    PICKED_ITEMS_LIST oldItems;
    oldItems.m_Status = UR_WIRE_IMAGE;

    while( oldWires.GetCount() != 0 )
    {
        ITEM_PICKER picker = ITEM_PICKER( oldWires.PopFront(), UR_WIRE_IMAGE );
        oldItems.PushItem( picker );
    }

    SaveCopyInUndoList( oldItems, UR_WIRE_IMAGE );

    // Remove segments backtracking over others
    RemoveBacktracks( s_wires );

    // Add the new wires
    screen->Append( s_wires );

    // Correct and remove segments that need to be merged.
    screen->SchematicCleanUp();

    // A junction could be needed to connect the end point of the last created segment.
    if( screen->IsJunctionNeeded( endpoint ) )
        screen->Append( AddJunction( DC, endpoint ) );

    // A junction could be needed to connect the start point of the set of new created wires
    if( screen->IsJunctionNeeded( startPoint ) )
        screen->Append( AddJunction( DC, startPoint ) );

    m_canvas->Refresh();

    OnModify();
}

void SCH_EDIT_FRAME::PutDataInPreviousState( PICKED_ITEMS_LIST* aList, bool aRedoCommand )
{
    SCH_ITEM* item;
    SCH_ITEM* alt_item;

    // Exchange the current wires, buses, and junctions with the copy save by the last edit.
    if( aList->m_Status == UR_WIRE_IMAGE )
    {
        DLIST< SCH_ITEM > oldWires;

        // Prevent items from being deleted when the DLIST goes out of scope.
        oldWires.SetOwnership( false );

        // Remove all of the wires, buses, and junctions from the current screen.
        GetScreen()->ExtractWires( oldWires, false );

        // Copy the saved wires, buses, and junctions to the current screen.
        for( unsigned int i = 0;  i < aList->GetCount();  i++ )
            GetScreen()->Append( (SCH_ITEM*) aList->GetPickedItem( i ) );

        aList->ClearItemsList();

        // Copy the previous wires, buses, and junctions to the picked item list for the
        // redo operation.
        while( oldWires.GetCount() != 0 )
        {
            ITEM_PICKER picker = ITEM_PICKER( oldWires.PopFront(), UR_WIRE_IMAGE );
            aList->PushItem( picker );
        }

        return;
    }

    // Undo in the reverse order of list creation: (this can allow stacked changes like the
    // same item can be changes and deleted in the same complex command.
    for( int ii = aList->GetCount() - 1; ii >= 0; ii--  )
    {
        item = (SCH_ITEM*) aList->GetPickedItem( ii );
        wxASSERT( item );

        item->ClearFlags();

        SCH_ITEM* image = (SCH_ITEM*) aList->GetPickedItemLink( ii );

        switch( aList->GetPickedItemStatus( ii ) )
        {
        case UR_CHANGED: /* Exchange old and new data for each item */
            item->SwapData( image );
            break;

        case UR_NEW:     /* new items are deleted */
            aList->SetPickedItemStatus( UR_DELETED, ii );
            GetScreen()->Remove( item );
            break;

        case UR_DELETED: /* deleted items are put in the draw item list, as new items */
            aList->SetPickedItemStatus( UR_NEW, ii );
            GetScreen()->Append( item );
            break;

        case UR_MOVED:
            item->ClearFlags();
            item->SetFlags( aList->GetPickerFlags( ii ) );
            item->Move( aRedoCommand ? aList->m_TransformPoint : -aList->m_TransformPoint );
            item->ClearFlags();
            break;

        case UR_MIRRORED_Y:
            item->MirrorY( aList->m_TransformPoint.x );
            break;

        case UR_MIRRORED_X:
            item->MirrorX( aList->m_TransformPoint.y );
            break;

        case UR_ROTATED:
            // To undo a rotate 90 deg transform we must rotate 270 deg to undo
            // and 90 deg to redo:
            item->Rotate( aList->m_TransformPoint );

            if( aRedoCommand )
                break;  // A only one rotate transform is OK

            // Make 3 rotate 90 deg transforms is this is actually an undo command
            item->Rotate( aList->m_TransformPoint );
            item->Rotate( aList->m_TransformPoint );
            break;

        case UR_EXCHANGE_T:
            alt_item = (SCH_ITEM*) aList->GetPickedItemLink( ii );
            alt_item->SetNext( NULL );
            alt_item->SetBack( NULL );
            GetScreen()->Remove( item );
            GetScreen()->Append( alt_item );
            aList->SetPickedItem( alt_item, ii );
            aList->SetPickedItemLink( item, ii );
            break;

        default:
            wxFAIL_MSG( wxString::Format( wxT( "Unknown undo/redo command %d" ),
//.........这里部分代码省略.........

//.........这里部分代码省略.........
    case ID_POPUP_SCH_BEGIN_WIRE:
        m_canvas->MoveCursorToCrossHair();
        OnLeftClick( &dc, GetCrossHairPosition() );
        break;

    case ID_POPUP_SCH_BEGIN_BUS:
        m_canvas->MoveCursorToCrossHair();
        OnLeftClick( &dc, GetCrossHairPosition() );
        break;

    case ID_POPUP_SCH_SET_SHAPE_TEXT:
        // Not used
        break;

    case ID_POPUP_SCH_DELETE_NODE:
    case ID_POPUP_SCH_DELETE_CONNECTION:
        m_canvas->MoveCursorToCrossHair();
        DeleteConnection( id == ID_POPUP_SCH_DELETE_CONNECTION );
        screen->SetCurItem( NULL );
        SetRepeatItem( NULL );
        screen->TestDanglingEnds( m_canvas, &dc );
        m_canvas->Refresh();
        break;

    case ID_POPUP_SCH_BREAK_WIRE:
    {
        DLIST< SCH_ITEM > oldWires;

        oldWires.SetOwnership( false );      // Prevent DLIST for deleting items in destructor.
        m_canvas->MoveCursorToCrossHair();
        screen->ExtractWires( oldWires, true );
        screen->BreakSegment( GetCrossHairPosition() );

        if( oldWires.GetCount() != 0 )
        {
            PICKED_ITEMS_LIST oldItems;

            oldItems.m_Status = UR_WIRE_IMAGE;

            while( oldWires.GetCount() != 0 )
            {
                ITEM_PICKER picker = ITEM_PICKER( oldWires.PopFront(), UR_WIRE_IMAGE );
                oldItems.PushItem( picker );
            }

            SaveCopyInUndoList( oldItems, UR_WIRE_IMAGE );
        }

        screen->TestDanglingEnds( m_canvas, &dc );
    }
    break;

    case ID_POPUP_SCH_DELETE_CMP:
    case ID_POPUP_SCH_DELETE:
        if( item == NULL )
            break;

        DeleteItem( item );
        screen->SetCurItem( NULL );
        SetRepeatItem( NULL );
        screen->TestDanglingEnds( m_canvas, &dc );
        SetSheetNumberAndCount();
        OnModify();
        break;

    case ID_POPUP_SCH_END_SHEET: