/// Redraws the zone outline when moving a corner according to the cursor position
void Show_Zone_Corner_Or_Outline_While_Move_Mouse( EDA_DRAW_PANEL* aPanel, wxDC* aDC,
                                                   const wxPoint& aPosition, bool aErase )
{
    PCB_EDIT_FRAME* pcbframe = (PCB_EDIT_FRAME*) aPanel->GetParent();
    ZONE_CONTAINER* zone = (ZONE_CONTAINER*) pcbframe->GetCurItem();

    if( aErase )    // Undraw edge in old position
    {
        zone->Draw( aPanel, aDC, GR_XOR );
    }

    wxPoint pos = pcbframe->GetScreen()->GetCrossHairPosition();

    if( zone->IsMoving() )
    {
        wxPoint offset;
        offset = pos - s_CursorLastPosition;
        zone->Move( offset );
        s_CursorLastPosition = pos;
    }
    else if( zone->IsDragging() )
    {
        wxPoint offset;
        offset = pos - s_CursorLastPosition;
        zone->MoveEdge( offset );
        s_CursorLastPosition = pos;
    }
    else
    {
        zone->m_Poly->MoveCorner( zone->m_CornerSelection, pos.x, pos.y );
    }

    zone->Draw( aPanel, aDC, GR_XOR );
}
void BOARD::DrawHighLight( EDA_DRAW_PANEL* am_canvas, wxDC* DC, int aNetCode )
{
    GR_DRAWMODE draw_mode;

    if( IsHighLightNetON() )
        draw_mode = GR_HIGHLIGHT | GR_OR;
    else
        draw_mode = GR_AND | GR_HIGHLIGHT;

    // Redraw zones
    for( int ii = 0; ii < GetAreaCount(); ii++ )
    {
        ZONE_CONTAINER* zone = GetArea( ii );

        if( zone->GetNetCode() == aNetCode )
        {
            zone->Draw( am_canvas, DC, draw_mode );
        }
    }

    // Redraw any pads that have aNetCode
    for( MODULE* module = m_Modules; module; module = module->Next() )
    {
        for( D_PAD* pad = module->PadsList(); pad; pad = pad->Next() )
        {
            if( pad->GetNetCode() == aNetCode )
            {
                pad->Draw( am_canvas, DC, draw_mode );
            }
        }
    }

    // Redraw track and vias that have aNetCode
    for( TRACK* seg = m_Track; seg; seg = seg->Next() )
    {
        if( seg->GetNetCode() == aNetCode )
        {
            seg->Draw( am_canvas, DC, draw_mode );
        }
    }
}
// Redraw the BOARD items but not cursors, axis or grid
void BOARD::Draw( EDA_DRAW_PANEL* aPanel, wxDC* DC, GR_DRAWMODE aDrawMode, const wxPoint& offset )
{
    /* The order of drawing is flexible on some systems and not on others.  For
     * OSes which use OR to draw, the order is not important except for the
     * effect of the highlight and its relationship to markers. See comment
     * below.
     * This order independence comes from the fact that a binary OR operation is
     * commutative in nature.
     * However on the OSX, the OR operation is not used, and so this sequence
     * below is chosen to give MODULEs the highest visible priority.
     */

    /* Draw all tracks and zones.  As long as dark colors are used for the
     * tracks,  Then the OR draw mode should show tracks underneath other
     * tracks.  But a white track will cover any other color since it has
     * more bits to OR in.
     */
    for( TRACK* track = m_Track; track; track = track->Next() )
    {
        if( track->IsMoving() )
            continue;

        track->Draw( aPanel, DC, aDrawMode );
    }

    // Draw areas (i.e. zones)
    for( int ii = 0; ii < GetAreaCount(); ii++ )
    {
        ZONE_CONTAINER* zone = GetArea( ii );

        // Areas must be drawn here only if not moved or dragged,
        // because these areas are drawn by ManageCursor() in a specific manner
        if( ( zone->GetEditFlags() & (IN_EDIT | IS_DRAGGED | IS_MOVED) ) == 0 )
        {
            zone->Draw( aPanel, DC, aDrawMode );
            zone->DrawFilledArea( aPanel, DC, aDrawMode );
        }
    }

    // Draw the graphic items
    for( BOARD_ITEM* item = m_Drawings; item; item = item->Next() )
    {
        if( item->IsMoving() )
            continue;

        switch( item->Type() )
        {
        case PCB_DIMENSION_T:
        case PCB_TEXT_T:
        case PCB_TARGET_T:
        case PCB_LINE_T:
            item->Draw( aPanel, DC, aDrawMode );
            break;

        default:
            break;
        }
    }

    LSET all_cu = LSET::AllCuMask();

    for( MODULE* module = m_Modules; module; module = module->Next() )
    {
        bool    display = true;
        LSET    layerMask = all_cu;

        if( module->IsMoving() )
            continue;

        if( !IsElementVisible( LAYER_MOD_FR ) )
        {
            if( module->GetLayer() == F_Cu )
                display = false;

            layerMask.set( F_Cu, false );
        }

        if( !IsElementVisible( LAYER_MOD_BK ) )
        {
            if( module->GetLayer() == B_Cu )
                display = false;

            layerMask.set( B_Cu, false );
        }

        if( display )
            module->Draw( aPanel, DC, aDrawMode );
        else
            Trace_Pads_Only( aPanel, DC, module, 0, 0, layerMask, aDrawMode );
    }

    // draw the BOARD's markers last, otherwise the high light will erase any marker on a pad
    for( unsigned i = 0; i < m_markers.size(); ++i )
    {
        m_markers[i]->Draw( aPanel, DC, aDrawMode );
    }
}