pcb_tuning_pattern.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2023 Alex Shvartzkop <[email protected]>
 * Copyright (C) 2023 KiCad Developers, see AUTHORS.txt for contributors.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, you may find one here:
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * or you may search the http://www.gnu.org website for the version 2 license,
 * or you may write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
 */
 
#include <pcb_generator.h>
#include <generators_mgr.h>
 
#include <optional>
#include <magic_enum.hpp>
 
#include <wx/debug.h>
#include <gal/graphics_abstraction_layer.h>
#include <geometry/shape_circle.h>
#include <kiplatform/ui.h>
#include <dialogs/dialog_unit_entry.h>
#include <collectors.h>
#include <scoped_set_reset.h>
 
#include <board_design_settings.h>
#include <drc/drc_engine.h>
#include <pcb_track.h>
#include <pcb_shape.h>
#include <pcb_group.h>
 
#include <tool/edit_points.h>
#include <tools/drawing_tool.h>
#include <tools/generator_tool.h>
#include <tools/pcb_picker_tool.h>
#include <tools/pcb_selection_tool.h>
#include <tools/zone_filler_tool.h>
 
#include <preview_items/draw_context.h>
#include <preview_items/preview_utils.h>
#include <view/view.h>
 
#include <router/pns_dp_meander_placer.h>
#include <router/pns_meander_placer_base.h>
#include <router/pns_meander.h>
#include <router/pns_kicad_iface.h>
#include <router/pns_segment.h>
#include <router/pns_arc.h>
#include <router/pns_solid.h>
#include <router/pns_topology.h>
#include <router/router_preview_item.h>
 
#include <dialogs/dialog_tuning_pattern_properties.h>
 
 
enum LENGTH_TUNING_MODE
{
 SINGLE,
 DIFF_PAIR,
 DIFF_PAIR_SKEW
};
 
 
class TUNING_STATUS_VIEW_ITEM : public EDA_ITEM
{
public:
 TUNING_STATUS_VIEW_ITEM( PCB_BASE_EDIT_FRAME* aFrame ) :
 EDA_ITEM( NOT_USED ), // Never added to anything - just a preview
 m_frame( aFrame ),
 m_min( 0.0 ),
 m_max( 0.0 ),
 m_current( 0.0 )
 { }
 
 wxString GetClass() const override { return wxT( "TUNING_STATUS" ); }
 
#if defined(DEBUG)
 void Show( int nestLevel, std::ostream& os ) const override {}
#endif
 
 VECTOR2I GetPosition() const override { return m_pos; }
 void SetPosition( const VECTOR2I& aPos ) override { m_pos = aPos; };
 
 void SetMinMax( double aMin, double aMax )
 {
 m_min = aMin;
 m_minText = m_frame->MessageTextFromValue( m_min, false );
 m_max = aMax;
 m_maxText = m_frame->MessageTextFromValue( m_max, false );
 }
 
 void ClearMinMax()
 {
 m_min = 0.0;
 m_minText = wxT( "---" );
 m_max = std::numeric_limits<double>::max();
 m_maxText = wxT( "---" );
 }
 
 void SetCurrent( double aCurrent, const wxString& aLabel )
 {
 m_current = aCurrent;
 m_currentText = m_frame->MessageTextFromValue( aCurrent );
 m_currentLabel = aLabel;
 }
 
 const BOX2I ViewBBox() const override
 {
 BOX2I tmp;
 
 // this is an edit-time artefact; no reason to try and be smart with the bounding box
 // (besides, we can't tell the text extents without a view to know what the scale is)
 tmp.SetMaximum();
 return tmp;
 }
 
 void ViewGetLayers( int aLayers[], int& aCount ) const override
 {
 aLayers[0] = LAYER_UI_START;
 aLayers[1] = LAYER_UI_START + 1;
 aCount = 2;
 }
 
 void ViewDraw( int aLayer, KIGFX::VIEW* aView ) const override
 {
 KIGFX::GAL* gal = aView->GetGAL();
 bool viewFlipped = gal->IsFlippedX();
 bool drawingDropShadows = ( aLayer == LAYER_UI_START );
 
 gal->Save();
 gal->Scale( { 1., 1. } );
 
 KIGFX::PREVIEW::TEXT_DIMS headerDims = KIGFX::PREVIEW::GetConstantGlyphHeight( gal, -2 );
 KIGFX::PREVIEW::TEXT_DIMS textDims = KIGFX::PREVIEW::GetConstantGlyphHeight( gal, -1 );
 KIFONT::FONT* font = KIFONT::FONT::GetFont();
 const KIFONT::METRICS& fontMetrics = KIFONT::METRICS::Default();
 TEXT_ATTRIBUTES textAttrs;
 
 int glyphWidth = textDims.GlyphSize.x;
 VECTOR2I margin( KiROUND( glyphWidth * 0.4 ), KiROUND( glyphWidth ) );
 VECTOR2I size( glyphWidth * 25 + margin.x * 2, headerDims.GlyphSize.y + textDims.GlyphSize.y );
 VECTOR2I offset( margin.x * 2, -( size.y + margin.y * 2 ) );
 
 if( drawingDropShadows )
 {
 gal->SetIsFill( true );
 gal->SetIsStroke( true );
 gal->SetLineWidth( gal->GetScreenWorldMatrix().GetScale().x * 2 );
 gal->SetStrokeColor( wxSystemSettings::GetColour( wxSYS_COLOUR_BTNTEXT ) );
 KIGFX::COLOR4D bgColor( wxSystemSettings::GetColour( wxSYS_COLOUR_BTNFACE ) );
 gal->SetFillColor( bgColor.WithAlpha( 0.9 ) );
 
 gal->DrawRectangle( GetPosition() + offset - margin,
 GetPosition() + offset + size + margin );
 gal->Restore();
 return;
 }
 
 COLOR4D bg = wxSystemSettings::GetColour( wxSYS_COLOUR_BTNFACE );
 COLOR4D normal = wxSystemSettings::GetColour( wxSYS_COLOUR_BTNTEXT );
 COLOR4D red;
 
 // Choose a red with reasonable contrasting with the background
 double bg_h, bg_s, bg_l;
 bg.ToHSL( bg_h, bg_s, bg_l );
 red.FromHSL( 0, 1.0, bg_l < 0.5 ? 0.7 : 0.3 );
 
 if( viewFlipped )
 textAttrs.m_Halign = GR_TEXT_H_ALIGN_RIGHT;
 else
 textAttrs.m_Halign = GR_TEXT_H_ALIGN_LEFT;
 
 gal->SetIsFill( false );
 gal->SetIsStroke( true );
 gal->SetStrokeColor( normal );
 textAttrs.m_Halign = GR_TEXT_H_ALIGN_LEFT;
 
 // Prevent text flipping when view is flipped
 if( gal->IsFlippedX() )
 {
 textAttrs.m_Mirrored = true;
 textAttrs.m_Halign = GR_TEXT_H_ALIGN_RIGHT;
 }
 
 textAttrs.m_Size = headerDims.GlyphSize;
 textAttrs.m_StrokeWidth = headerDims.StrokeWidth;
 
 VECTOR2I textPos = GetPosition() + offset;
 font->Draw( gal, m_currentLabel, textPos, textAttrs, KIFONT::METRICS::Default() );
 
 textPos.x += glyphWidth * 11 + margin.x;
 font->Draw( gal, _( "min" ), textPos, textAttrs, fontMetrics );
 
 textPos.x += glyphWidth * 7 + margin.x;
 font->Draw( gal, _( "max" ), textPos, textAttrs, fontMetrics );
 
 textAttrs.m_Size = textDims.GlyphSize;
 textAttrs.m_StrokeWidth = textDims.StrokeWidth;
 
 textPos = GetPosition() + offset;
 textPos.y += KiROUND( headerDims.LinePitch * 1.3 );
 font->Draw( gal, m_currentText, textPos, textAttrs, KIFONT::METRICS::Default() );
 
 textPos.x += glyphWidth * 11 + margin.x;
 gal->SetStrokeColor( m_current < m_min ? red : normal );
 font->Draw( gal, m_minText, textPos, textAttrs, fontMetrics );
 
 textPos.x += glyphWidth * 7 + margin.x;
 gal->SetStrokeColor( m_current > m_max ? red : normal );
 font->Draw( gal, m_maxText, textPos, textAttrs, fontMetrics );
 
 gal->Restore();
 }
 
protected:
 EDA_DRAW_FRAME* m_frame;
 VECTOR2I m_pos;
 double m_min;
 double m_max;
 double m_current;
 wxString m_currentLabel;
 wxString m_currentText;
 wxString m_minText;
 wxString m_maxText;
};
 
 
class PCB_TUNING_PATTERN : public PCB_GENERATOR
{
public:
 static const wxString GENERATOR_TYPE;
 static const wxString DISPLAY_NAME;
 
 PCB_TUNING_PATTERN( BOARD_ITEM* aParent = nullptr, PCB_LAYER_ID aLayer = F_Cu,
 LENGTH_TUNING_MODE aMode = LENGTH_TUNING_MODE::SINGLE );
 
 wxString GetGeneratorType() const override { return wxS( "tuning_pattern" ); }
 
 wxString GetItemDescription( UNITS_PROVIDER* aUnitsProvider ) const override
 {
 return wxString( _( "Tuning Pattern" ) );
 }
 
 wxString GetFriendlyName() const override
 {
 return wxString( _( "Tuning Pattern" ) );
 }
 
 wxString GetPluralName() const override
 {
 return wxString( _( "Tuning Patterns" ) );
 }
 
 static PCB_TUNING_PATTERN* CreateNew( GENERATOR_TOOL* aTool, PCB_BASE_EDIT_FRAME* aFrame,
 BOARD_CONNECTED_ITEM* aStartItem,
 LENGTH_TUNING_MODE aMode );
 
 void EditStart( GENERATOR_TOOL* aTool, BOARD* aBoard, BOARD_COMMIT* aCommit ) override;
 
 bool Update( GENERATOR_TOOL* aTool, BOARD* aBoard, BOARD_COMMIT* aCommit ) override;
 
 void EditPush( GENERATOR_TOOL* aTool, BOARD* aBoard, BOARD_COMMIT* aCommit,
 const wxString& aCommitMsg = wxEmptyString, int aCommitFlags = 0 ) override;
 
 void EditRevert( GENERATOR_TOOL* aTool, BOARD* aBoard, BOARD_COMMIT* aCommit ) override;
 
 void Remove( GENERATOR_TOOL* aTool, BOARD* aBoard, BOARD_COMMIT* aCommit ) override;
 
 bool MakeEditPoints( std::shared_ptr<EDIT_POINTS> points ) const override;
 
 bool UpdateFromEditPoints( std::shared_ptr<EDIT_POINTS> aEditPoints,
 BOARD_COMMIT* aCommit ) override;
 
 bool UpdateEditPoints( std::shared_ptr<EDIT_POINTS> aEditPoints ) override;
 
 void Move( const VECTOR2I& aMoveVector ) override
 {
 m_origin += aMoveVector;
 m_end += aMoveVector;
 
 if( !this->HasFlag( IN_EDIT ) )
 {
 PCB_GROUP::Move( aMoveVector );
 
 if( m_baseLine )
 m_baseLine->Move( aMoveVector );
 
 if( m_baseLineCoupled )
 m_baseLineCoupled->Move( aMoveVector );
 }
 }
 
 void Rotate( const VECTOR2I& aRotCentre, const EDA_ANGLE& aAngle ) override
 {
 if( !this->HasFlag( IN_EDIT ) )
 {
 RotatePoint( m_origin, aRotCentre, aAngle );
 RotatePoint( m_end, aRotCentre, aAngle );
 PCB_GROUP::Rotate( aRotCentre, aAngle );
 
 if( m_baseLine )
 m_baseLine->Rotate( aAngle, aRotCentre );
 
 if( m_baseLineCoupled )
 m_baseLineCoupled->Rotate( aAngle, aRotCentre );
 }
 }
 
 const BOX2I GetBoundingBox() const override
 {
 return getOutline().BBox();
 }
 
 void ViewGetLayers( int aLayers[], int& aCount ) const override
 {
 aCount = 0;
 aLayers[aCount++] = LAYER_ANCHOR;
 aLayers[aCount++] = GetLayer();
 }
 
 bool HitTest( const VECTOR2I& aPosition, int aAccuracy = 0 ) const override
 {
 return getOutline().Collide( aPosition, aAccuracy );
 }
 
 bool HitTest( const BOX2I& aRect, bool aContained, int aAccuracy ) const override
 {
 BOX2I sel = aRect;
 
 if ( aAccuracy )
 sel.Inflate( aAccuracy );
 
 if( aContained )
 return sel.Contains( GetBoundingBox() );
 
 return sel.Intersects( GetBoundingBox() );
 }
 
 const BOX2I ViewBBox() const override { return GetBoundingBox(); }
 
 EDA_ITEM* Clone() const override { return new PCB_TUNING_PATTERN( *this ); }
 
 void ViewDraw( int aLayer, KIGFX::VIEW* aView ) const override final;
 
 const VECTOR2I& GetEnd() const { return m_end; }
 void SetEnd( const VECTOR2I& aValue ) { m_end = aValue; }
 
 int GetEndX() const { return m_end.x; }
 void SetEndX( int aValue ) { m_end.x = aValue; }
 
 int GetEndY() const { return m_end.y; }
 void SetEndY( int aValue ) { m_end.y = aValue; }
 
 LENGTH_TUNING_MODE GetTuningMode() const { return m_tuningMode; }
 
 PNS::ROUTER_MODE GetPNSMode()
 {
 switch( m_tuningMode )
 {
 case LENGTH_TUNING_MODE::SINGLE: return PNS::PNS_MODE_TUNE_SINGLE;
 case LENGTH_TUNING_MODE::DIFF_PAIR: return PNS::PNS_MODE_TUNE_DIFF_PAIR;
 case LENGTH_TUNING_MODE::DIFF_PAIR_SKEW: return PNS::PNS_MODE_TUNE_DIFF_PAIR_SKEW;
 default: return PNS::PNS_MODE_TUNE_SINGLE;
 }
 }
 
 PNS::MEANDER_SETTINGS& GetSettings() { return m_settings; }
 
 int GetMinAmplitude() const { return m_settings.m_minAmplitude; }
 void SetMinAmplitude( int aValue )
 {
 aValue = std::max( aValue, 0 );
 
 m_settings.m_minAmplitude = aValue;
 
 if( m_settings.m_maxAmplitude < m_settings.m_minAmplitude )
 m_settings.m_maxAmplitude = m_settings.m_minAmplitude;
 }
 
 int GetMaxAmplitude() const { return m_settings.m_maxAmplitude; }
 void SetMaxAmplitude( int aValue )
 {
 aValue = std::max( aValue, 0 );
 
 m_settings.m_maxAmplitude = aValue;
 
 if( m_settings.m_maxAmplitude < m_settings.m_minAmplitude )
 m_settings.m_minAmplitude = m_settings.m_maxAmplitude;
 }
 
 PNS::MEANDER_SIDE GetInitialSide() const { return m_settings.m_initialSide; }
 void SetInitialSide( PNS::MEANDER_SIDE aValue ) { m_settings.m_initialSide = aValue; }
 
 int GetSpacing() const { return m_settings.m_spacing; }
 void SetSpacing( int aValue ) { m_settings.m_spacing = aValue; }
 
 std::optional<int> GetTargetLength() const
 {
 if( m_settings.m_targetLength.Opt() == PNS::MEANDER_SETTINGS::LENGTH_UNCONSTRAINED )
 return std::optional<int>();
 else
 return m_settings.m_targetLength.Opt();
 }
 
 void SetTargetLength( std::optional<int> aValue )
 {
 if( aValue.has_value() )
 m_settings.SetTargetLength( aValue.value() );
 else
 m_settings.SetTargetLength( PNS::MEANDER_SETTINGS::LENGTH_UNCONSTRAINED );
 }
 
 int GetTargetSkew() const { return m_settings.m_targetSkew.Opt(); }
 void SetTargetSkew( int aValue ) { m_settings.SetTargetSkew( aValue ); }
 
 bool GetOverrideCustomRules() const { return m_settings.m_overrideCustomRules; }
 void SetOverrideCustomRules( bool aOverride ) { m_settings.m_overrideCustomRules = aOverride; }
 
 int GetCornerRadiusPercentage() const { return m_settings.m_cornerRadiusPercentage; }
 void SetCornerRadiusPercentage( int aValue ) { m_settings.m_cornerRadiusPercentage = aValue; }
 
 bool IsSingleSided() const { return m_settings.m_singleSided; }
 void SetSingleSided( bool aValue ) { m_settings.m_singleSided = aValue; }
 
 bool IsRounded() const { return m_settings.m_cornerStyle == PNS::MEANDER_STYLE_ROUND; }
 void SetRounded( bool aFlag ) { m_settings.m_cornerStyle = aFlag ? PNS::MEANDER_STYLE_ROUND
 : PNS::MEANDER_STYLE_CHAMFER; }
 
 std::vector<std::pair<wxString, wxVariant>> GetRowData() override
 {
 std::vector<std::pair<wxString, wxVariant>> data = PCB_GENERATOR::GetRowData();
 data.emplace_back( _HKI( "Net" ), m_lastNetName );
 data.emplace_back( _HKI( "Tuning" ), m_tuningInfo );
 return data;
 }
 
 const STRING_ANY_MAP GetProperties() const override;
 void SetProperties( const STRING_ANY_MAP& aProps ) override;
 
 void ShowPropertiesDialog( PCB_BASE_EDIT_FRAME* aEditFrame ) override;
 
 std::vector<EDA_ITEM*> GetPreviewItems( GENERATOR_TOOL* aTool, PCB_BASE_EDIT_FRAME* aFrame,
 bool aStatusItemsOnly = false ) override;
 
 void GetMsgPanelInfo( EDA_DRAW_FRAME* aFrame, std::vector<MSG_PANEL_ITEM>& aList ) override;
 
protected:
 void swapData( BOARD_ITEM* aImage ) override
 {
 wxASSERT( aImage->Type() == PCB_GENERATOR_T );
 
 std::swap( *this, *static_cast<PCB_TUNING_PATTERN*>( aImage ) );
 }
 
 bool recoverBaseline( PNS::ROUTER* aRouter );
 
 bool baselineValid();
 
 bool initBaseLine( PNS::ROUTER* aRouter, int aLayer, BOARD* aBoard, VECTOR2I& aStart,
 VECTOR2I& aEnd, NETINFO_ITEM* aNet,
 std::optional<SHAPE_LINE_CHAIN>& aBaseLine );
 
 bool initBaseLines( PNS::ROUTER* aRouter, int aLayer, BOARD* aBoard );
 
 bool removeToBaseline( PNS::ROUTER* aRouter, int aLayer, SHAPE_LINE_CHAIN& aBaseLine );
 
 bool resetToBaseline( GENERATOR_TOOL* aTool, int aLayer, SHAPE_LINE_CHAIN& aBaseLine,
 bool aPrimary );
 
 SHAPE_LINE_CHAIN getOutline() const;
 
protected:
 VECTOR2I m_end;
 
 PNS::MEANDER_SETTINGS m_settings;
 
 std::optional<SHAPE_LINE_CHAIN> m_baseLine;
 std::optional<SHAPE_LINE_CHAIN> m_baseLineCoupled;
 
 int m_trackWidth;
 int m_diffPairGap;
 
 LENGTH_TUNING_MODE m_tuningMode;
 
 wxString m_lastNetName;
 wxString m_tuningInfo;
 
 PNS::MEANDER_PLACER_BASE::TUNING_STATUS m_tuningStatus;
};
 
 
static LENGTH_TUNING_MODE tuningFromString( const std::string& aStr )
{
 if( aStr == "single" )
 return LENGTH_TUNING_MODE::SINGLE;
 else if( aStr == "diff_pair" )
 return LENGTH_TUNING_MODE::DIFF_PAIR;
 else if( aStr == "diff_pair_skew" )
 return LENGTH_TUNING_MODE::DIFF_PAIR_SKEW;
 else
 {
 wxFAIL_MSG( wxS( "Unknown length tuning token" ) );
 return LENGTH_TUNING_MODE::SINGLE;
 }
}
 
 
static std::string tuningToString( const LENGTH_TUNING_MODE aTuning )
{
 switch( aTuning )
 {
 case LENGTH_TUNING_MODE::SINGLE: return "single";
 case LENGTH_TUNING_MODE::DIFF_PAIR: return "diff_pair";
 case LENGTH_TUNING_MODE::DIFF_PAIR_SKEW: return "diff_pair_skew";
 default: wxFAIL; return "";
 }
}
 
 
static LENGTH_TUNING_MODE fromPNSMode( PNS::ROUTER_MODE aRouterMode )
{
 switch( aRouterMode )
 {
 case PNS::PNS_MODE_TUNE_SINGLE: return LENGTH_TUNING_MODE::SINGLE;
 case PNS::PNS_MODE_TUNE_DIFF_PAIR: return LENGTH_TUNING_MODE::DIFF_PAIR;
 case PNS::PNS_MODE_TUNE_DIFF_PAIR_SKEW: return LENGTH_TUNING_MODE::DIFF_PAIR_SKEW;
 default: return LENGTH_TUNING_MODE::SINGLE;
 }
}
 
 
static PNS::MEANDER_SIDE sideFromString( const std::string& aStr )
{
 if( aStr == "default" )
 return PNS::MEANDER_SIDE_DEFAULT;
 else if( aStr == "left" )
 return PNS::MEANDER_SIDE_LEFT;
 else if( aStr == "right" )
 return PNS::MEANDER_SIDE_RIGHT;
 else
 {
 wxFAIL_MSG( wxS( "Unknown length-tuning side token" ) );
 return PNS::MEANDER_SIDE_DEFAULT;
 }
}
 
 
static std::string statusToString( const PNS::MEANDER_PLACER_BASE::TUNING_STATUS aStatus )
{
 switch( aStatus )
 {
 case PNS::MEANDER_PLACER_BASE::TOO_LONG: return "too_long";
 case PNS::MEANDER_PLACER_BASE::TOO_SHORT: return "too_short";
 case PNS::MEANDER_PLACER_BASE::TUNED: return "tuned";
 default: wxFAIL; return "";
 }
}
 
 
static PNS::MEANDER_PLACER_BASE::TUNING_STATUS statusFromString( const std::string& aStr )
{
 if( aStr == "too_long" )
 return PNS::MEANDER_PLACER_BASE::TOO_LONG;
 else if( aStr == "too_short" )
 return PNS::MEANDER_PLACER_BASE::TOO_SHORT;
 else if( aStr == "tuned" )
 return PNS::MEANDER_PLACER_BASE::TUNED;
 else
 {
 wxFAIL_MSG( wxS( "Unknown tuning status token" ) );
 return PNS::MEANDER_PLACER_BASE::TUNED;
 }
}
 
 
static std::string sideToString( const PNS::MEANDER_SIDE aValue )
{
 switch( aValue )
 {
 case PNS::MEANDER_SIDE_DEFAULT: return "default";
 case PNS::MEANDER_SIDE_LEFT: return "left";
 case PNS::MEANDER_SIDE_RIGHT: return "right";
 default: wxFAIL; return "";
 }
}
 
 
PCB_TUNING_PATTERN::PCB_TUNING_PATTERN( BOARD_ITEM* aParent, PCB_LAYER_ID aLayer,
 LENGTH_TUNING_MODE aMode ) :
 PCB_GENERATOR( aParent, aLayer ),
 m_trackWidth( 0 ),
 m_diffPairGap( 0 ),
 m_tuningMode( aMode ),
 m_tuningStatus( PNS::MEANDER_PLACER_BASE::TUNING_STATUS::TUNED )
{
 m_generatorType = GENERATOR_TYPE;
 m_name = DISPLAY_NAME;
 m_end = VECTOR2I( pcbIUScale.mmToIU( 10 ), 0 );
 m_settings.m_initialSide = PNS::MEANDER_SIDE_LEFT;
}
 
 
static VECTOR2I snapToNearestTrack( const VECTOR2I& aP, BOARD* aBoard, NETINFO_ITEM* aNet,
 PCB_TRACK** aNearestTrack )
{
 SEG::ecoord minDist_sq = VECTOR2I::ECOORD_MAX;
 VECTOR2I closestPt = aP;
 
 for( PCB_TRACK *track : aBoard->Tracks() )
 {
 if( aNet && track->GetNet() != aNet )
 continue;
 
 VECTOR2I nearest;
 
 if( track->Type() == PCB_ARC_T )
 {
 PCB_ARC* pcbArc = static_cast<PCB_ARC*>( track );
 SHAPE_ARC arc( pcbArc->GetStart(), pcbArc->GetMid(), pcbArc->GetEnd(),
 pcbArc->GetWidth() );
 
 nearest = arc.NearestPoint( aP );
 }
 else
 {
 SEG seg( track->GetStart(), track->GetEnd() );
 nearest = seg.NearestPoint( aP );
 }
 
 SEG::ecoord dist_sq = ( nearest - aP ).SquaredEuclideanNorm();
 
 if( dist_sq < minDist_sq )
 {
 minDist_sq = dist_sq;
 closestPt = nearest;
 
 if( aNearestTrack )
 *aNearestTrack = track;
 }
 }
 
 return closestPt;
}
 
 
bool PCB_TUNING_PATTERN::baselineValid()
{
 if( m_tuningMode == DIFF_PAIR || m_tuningMode == DIFF_PAIR_SKEW )
 {
 return( m_baseLine && m_baseLine->PointCount() > 1
 && m_baseLineCoupled && m_baseLineCoupled->PointCount() > 1 );
 }
 else
 {
 return( m_baseLine && m_baseLine->PointCount() > 1 );
 }
}
 
 
PCB_TUNING_PATTERN* PCB_TUNING_PATTERN::CreateNew( GENERATOR_TOOL* aTool,
 PCB_BASE_EDIT_FRAME* aFrame,
 BOARD_CONNECTED_ITEM* aStartItem,
 LENGTH_TUNING_MODE aMode )
{
 BOARD* board = aStartItem->GetBoard();
 BOARD_DESIGN_SETTINGS& bds = board->GetDesignSettings();
 DRC_CONSTRAINT constraint;
 PCB_LAYER_ID layer = aStartItem->GetLayer();
 
 PCB_TUNING_PATTERN* pattern = new PCB_TUNING_PATTERN( board, layer, aMode );
 
 switch( aMode )
 {
 case SINGLE: pattern->m_settings = bds.m_SingleTrackMeanderSettings; break;
 case DIFF_PAIR: pattern->m_settings = bds.m_DiffPairMeanderSettings; break;
 case DIFF_PAIR_SKEW: pattern->m_settings = bds.m_SkewMeanderSettings; break;
 }
 
 constraint = bds.m_DRCEngine->EvalRules( LENGTH_CONSTRAINT, aStartItem, nullptr, layer );
 
 if( !constraint.IsNull() )
 {
 if( aMode == DIFF_PAIR_SKEW )
 pattern->m_settings.SetTargetSkew( constraint.GetValue() );
 else
 pattern->m_settings.SetTargetLength( constraint.GetValue() );
 }
 
 pattern->SetFlags( IS_NEW );
 
 return pattern;
}
 
void PCB_TUNING_PATTERN::EditStart( GENERATOR_TOOL* aTool, BOARD* aBoard, BOARD_COMMIT* aCommit )
{
 if( aCommit )
 {
 if( IsNew() )
 aCommit->Add( this );
 else
 aCommit->Modify( this );
 }
 
 SetFlags( IN_EDIT );
 
 int layer = GetLayer();
 PNS::ROUTER* router = aTool->Router();
 
 aTool->ClearRouterChanges();
 router->SyncWorld();
 
 PNS::RULE_RESOLVER* resolver = router->GetRuleResolver();
 PNS::CONSTRAINT constraint;
 
 if( !baselineValid() )
 initBaseLines( router, layer, aBoard );
 
 if( !m_settings.m_overrideCustomRules )
 {
 PCB_TRACK* track = nullptr;
 PNS::SEGMENT pnsItem;
 
 m_origin = snapToNearestTrack( m_origin, aBoard, nullptr, &track );
 wxCHECK( track, /* void */ );
 
 NETINFO_ITEM* net = track->GetNet();
 
 pnsItem.SetParent( track );
 pnsItem.SetNet( net );
 
 if( m_tuningMode == SINGLE )
 {
 if( resolver->QueryConstraint( PNS::CONSTRAINT_TYPE::CT_LENGTH,
 &pnsItem, nullptr, layer, &constraint ) )
 {
 m_settings.SetTargetLength( constraint.m_Value );
 aTool->GetManager()->PostEvent( EVENTS::SelectedItemsModified );
 }
 }
 else
 {
 PCB_TRACK* coupledTrack = nullptr;
 PNS::SEGMENT pnsCoupledItem;
 NETINFO_ITEM* coupledNet = aBoard->DpCoupledNet( net );
 
 if( coupledNet )
 snapToNearestTrack( m_origin, aBoard, coupledNet, &coupledTrack );
 
 pnsCoupledItem.SetParent( coupledTrack );
 pnsCoupledItem.SetNet( coupledNet );
 
 if( m_tuningMode == DIFF_PAIR )
 {
 if( resolver->QueryConstraint( PNS::CONSTRAINT_TYPE::CT_LENGTH,
 &pnsItem, &pnsCoupledItem, layer, &constraint ) )
 {
 m_settings.SetTargetLength( constraint.m_Value );
 aTool->GetManager()->PostEvent( EVENTS::SelectedItemsModified );
 }
 }
 else
 {
 if( resolver->QueryConstraint( PNS::CONSTRAINT_TYPE::CT_DIFF_PAIR_SKEW,
 &pnsItem, &pnsCoupledItem, layer, &constraint ) )
 {
 m_settings.m_targetSkew = constraint.m_Value;
 aTool->GetManager()->PostEvent( EVENTS::SelectedItemsModified );
 }
 }
 }
 }
}
 
 
static PNS::LINKED_ITEM* pickSegment( PNS::ROUTER* aRouter, const VECTOR2I& aWhere, int aLayer,
 VECTOR2I& aPointOut,
 const SHAPE_LINE_CHAIN& aBaseline = SHAPE_LINE_CHAIN() )
{
 int maxSlopRadius = aRouter->Sizes().Clearance() + aRouter->Sizes().TrackWidth() / 2;
 
 static const int candidateCount = 2;
 PNS::LINKED_ITEM* prioritized[candidateCount];
 SEG::ecoord dist[candidateCount];
 SEG::ecoord distBaseline[candidateCount];
 VECTOR2I point[candidateCount];
 
 for( int i = 0; i < candidateCount; i++ )
 {
 prioritized[i] = nullptr;
 dist[i] = VECTOR2I::ECOORD_MAX;
 distBaseline[i] = VECTOR2I::ECOORD_MAX;
 }
 
 for( int slopRadius : { 0, maxSlopRadius } )
 {
 PNS::ITEM_SET candidates = aRouter->QueryHoverItems( aWhere, slopRadius );
 
 for( PNS::ITEM* item : candidates.Items() )
 {
 if( !item->OfKind( PNS::ITEM::SEGMENT_T | PNS::ITEM::ARC_T ) )
 continue;
 
 if( !item->IsRoutable() )
 continue;
 
 if( !item->Layers().Overlaps( aLayer ) )
 continue;
 
 PNS::LINKED_ITEM* linked = static_cast<PNS::LINKED_ITEM*>( item );
 
 if( item->Kind() & PNS::ITEM::ARC_T )
 {
 PNS::ARC* pnsArc = static_cast<PNS::ARC*>( item );
 
 VECTOR2I nearest = pnsArc->Arc().NearestPoint( aWhere );
 SEG::ecoord d0 = ( nearest - aWhere ).SquaredEuclideanNorm();
 
 if( d0 > dist[1] )
 continue;
 
 if( aBaseline.PointCount() > 0 )
 {
 SEG::ecoord dcBaseline;
 VECTOR2I target = pnsArc->Arc().GetArcMid();
 
 if( aBaseline.SegmentCount() > 0 )
 dcBaseline = aBaseline.SquaredDistance( target );
 else
 dcBaseline = ( aBaseline.CPoint( 0 ) - target ).SquaredEuclideanNorm();
 
 if( dcBaseline > distBaseline[1] )
 continue;
 
 distBaseline[1] = dcBaseline;
 }
 
 prioritized[1] = linked;
 dist[1] = d0;
 point[1] = nearest;
 }
 else if( item->Kind() & PNS::ITEM::SEGMENT_T )
 {
 PNS::SEGMENT* segm = static_cast<PNS::SEGMENT*>( item );
 
 VECTOR2I nearest = segm->CLine().NearestPoint( aWhere, false );
 SEG::ecoord dd = ( aWhere - nearest ).SquaredEuclideanNorm();
 
 if( dd > dist[1] )
 continue;
 
 if( aBaseline.PointCount() > 0 )
 {
 SEG::ecoord dcBaseline;
 VECTOR2I target = segm->Shape()->Centre();
 
 if( aBaseline.SegmentCount() > 0 )
 dcBaseline = aBaseline.SquaredDistance( target );
 else
 dcBaseline = ( aBaseline.CPoint( 0 ) - target ).SquaredEuclideanNorm();
 
 if( dcBaseline > distBaseline[1] )
 continue;
 
 distBaseline[1] = dcBaseline;
 }
 
 prioritized[1] = segm;
 dist[1] = dd;
 point[1] = nearest;
 }
 }
 }
 
 PNS::LINKED_ITEM* rv = nullptr;
 
 for( int i = 0; i < candidateCount; i++ )
 {
 PNS::LINKED_ITEM* item = prioritized[i];
 
 if( item && ( aLayer < 0 || item->Layers().Overlaps( aLayer ) ) )
 {
 rv = item;
 aPointOut = point[i];
 break;
 }
 }
 
 return rv;
}
 
 
static std::optional<PNS::LINE> getPNSLine( const VECTOR2I& aStart, const VECTOR2I& aEnd,
 PNS::ROUTER* router, int layer, VECTOR2I& aStartOut,
 VECTOR2I& aEndOut )
{
 PNS::NODE* world = router->GetWorld();
 
 PNS::LINKED_ITEM* startItem = pickSegment( router, aStart, layer, aStartOut );
 PNS::LINKED_ITEM* endItem = pickSegment( router, aEnd, layer, aEndOut );
 
 //wxCHECK( startItem && endItem, std::nullopt );
 
 for( PNS::LINKED_ITEM* testItem : { startItem, endItem } )
 {
 if( !testItem )
 continue;
 
 PNS::LINE line = world->AssembleLine( testItem, nullptr, false, false );
 SHAPE_LINE_CHAIN oldChain = line.CLine();
 
 if( oldChain.PointOnEdge( aStartOut, 1 ) && oldChain.PointOnEdge( aEndOut, 1 ) )
 return line;
 }
 
 return std::nullopt;
}
 
 
bool PCB_TUNING_PATTERN::initBaseLine( PNS::ROUTER* aRouter, int aLayer, BOARD* aBoard,
 VECTOR2I& aStart, VECTOR2I& aEnd, NETINFO_ITEM* aNet,
 std::optional<SHAPE_LINE_CHAIN>& aBaseLine )
{
 PNS::NODE* world = aRouter->GetWorld();
 
 aStart = snapToNearestTrack( aStart, aBoard, aNet, nullptr );
 aEnd = snapToNearestTrack( aEnd, aBoard, aNet, nullptr );
 
 VECTOR2I startSnapPoint, endSnapPoint;
 
 PNS::LINKED_ITEM* startItem = pickSegment( aRouter, aStart, aLayer, startSnapPoint );
 PNS::LINKED_ITEM* endItem = pickSegment( aRouter, aEnd, aLayer, endSnapPoint );
 
 wxASSERT( startItem );
 wxASSERT( endItem );
 
 if( !startItem || !endItem )
 return false;
 
 PNS::LINE line = world->AssembleLine( startItem );
 const SHAPE_LINE_CHAIN& chain = line.CLine();
 
 wxASSERT( line.ContainsLink( endItem ) );
 
 wxASSERT( chain.PointOnEdge( startSnapPoint, 40000 ) );
 wxASSERT( chain.PointOnEdge( endSnapPoint, 40000 ) );
 
 SHAPE_LINE_CHAIN pre;
 SHAPE_LINE_CHAIN mid;
 SHAPE_LINE_CHAIN post;
 
 chain.Split( startSnapPoint, endSnapPoint, pre, mid, post );
 
 aBaseLine = mid;
 
 return true;
}
 
 
bool PCB_TUNING_PATTERN::initBaseLines( PNS::ROUTER* aRouter, int aLayer, BOARD* aBoard )
{
 m_baseLineCoupled.reset();
 
 PCB_TRACK* track = nullptr;
 
 m_origin = snapToNearestTrack( m_origin, aBoard, nullptr, &track );
 wxCHECK( track, false );
 
 NETINFO_ITEM* net = track->GetNet();
 
 if( !initBaseLine( aRouter, aLayer, aBoard, m_origin, m_end, net, m_baseLine ) )
 return false;
 
 // Generate both baselines even if we're skewing. We need the coupled baseline to run the
 // DRC rules against.
 if( m_tuningMode == DIFF_PAIR || m_tuningMode == DIFF_PAIR_SKEW )
 {
 if( NETINFO_ITEM* coupledNet = aBoard->DpCoupledNet( net ) )
 {
 VECTOR2I coupledStart = snapToNearestTrack( m_origin, aBoard, coupledNet, nullptr );
 VECTOR2I coupledEnd = snapToNearestTrack( m_end, aBoard, coupledNet, nullptr );
 
 return initBaseLine( aRouter, aLayer, aBoard, coupledStart, coupledEnd, coupledNet,
 m_baseLineCoupled );
 }
 
 return false;
 }
 
 return true;
}
 
bool PCB_TUNING_PATTERN::removeToBaseline( PNS::ROUTER* aRouter, int aLayer,
 SHAPE_LINE_CHAIN& aBaseLine )
{
 VECTOR2I startSnapPoint, endSnapPoint;
 
 std::optional<PNS::LINE> pnsLine = getPNSLine( aBaseLine.CPoint( 0 ), aBaseLine.CPoint( -1 ),
 aRouter, aLayer, startSnapPoint, endSnapPoint );
 
 wxCHECK( pnsLine, false );
 
 SHAPE_LINE_CHAIN pre;
 SHAPE_LINE_CHAIN mid;
 SHAPE_LINE_CHAIN post;
 pnsLine->CLine().Split( startSnapPoint, endSnapPoint, pre, mid, post );
 
 for( PNS::LINKED_ITEM* li : pnsLine->Links() )
 aRouter->GetInterface()->RemoveItem( li );
 
 aRouter->GetWorld()->Remove( *pnsLine );
 
 SHAPE_LINE_CHAIN straightChain;
 straightChain.Append( pre );
 straightChain.Append( aBaseLine );
 straightChain.Append( post );
 straightChain.Simplify();
 
 PNS::LINE straightLine( *pnsLine, straightChain );
 
 aRouter->GetWorld()->Add( straightLine, false );
 
 for( PNS::LINKED_ITEM* li : straightLine.Links() )
 aRouter->GetInterface()->AddItem( li );
 
 return true;
}
 
 
void PCB_TUNING_PATTERN::Remove( GENERATOR_TOOL* aTool, BOARD* aBoard, BOARD_COMMIT* aCommit )
{
 SetFlags( IN_EDIT );
 
 aTool->Router()->SyncWorld();
 
 PNS::ROUTER* router = aTool->Router();
 int layer = GetLayer();
 
 // Ungroup first so that undo works
 if( !GetItems().empty() )
 {
 PCB_GENERATOR* group = this;
 
 for( BOARD_ITEM* member : group->GetItems() )
 aCommit->Stage( member, CHT_UNGROUP );
 
 group->GetItems().clear();
 }
 
 aCommit->Remove( this );
 
 aTool->ClearRouterChanges();
 
 if( baselineValid() )
 {
 bool success = true;
 
 success &= removeToBaseline( router, layer, *m_baseLine );
 
 if( m_tuningMode == DIFF_PAIR )
 success &= removeToBaseline( router, layer, *m_baseLineCoupled );
 
 if( !success )
 recoverBaseline( router );
 }
 
 const std::vector<GENERATOR_PNS_CHANGES>& allPnsChanges = aTool->GetRouterChanges();
 
 for( const GENERATOR_PNS_CHANGES& pnsChanges : allPnsChanges )
 {
 const std::set<BOARD_ITEM*> routerRemovedItems = pnsChanges.removedItems;
 const std::set<BOARD_ITEM*> routerAddedItems = pnsChanges.addedItems;
 
 /*std::cout << "Push commits << " << allPnsChanges.size() << " routerRemovedItems "
 << routerRemovedItems.size() << " routerAddedItems " << routerAddedItems.size()
 << " m_removedItems " << m_removedItems.size() << std::endl;*/
 
 for( BOARD_ITEM* item : routerRemovedItems )
 {
 item->ClearSelected();
 aCommit->Remove( item );
 }
 
 for( BOARD_ITEM* item : routerAddedItems )
 aCommit->Add( item );
 }
 
 aCommit->Push( "Remove Tuning Pattern" );
}
 
 
bool PCB_TUNING_PATTERN::recoverBaseline( PNS::ROUTER* aRouter )
{
 PNS::SOLID queryItem;
 
 SHAPE_LINE_CHAIN* chain = static_cast<SHAPE_LINE_CHAIN*>( getOutline().Clone() );
 queryItem.SetShape( chain ); // PNS::SOLID takes ownership
 queryItem.SetLayer( m_layer );
 
 int lineWidth = 0;
 
 PNS::NODE::OBSTACLES obstacles;
 PNS::COLLISION_SEARCH_OPTIONS opts;
 opts.m_useClearanceEpsilon = false;
 
 PNS::NODE* world = aRouter->GetWorld();
 PNS::NODE* branch = world->Branch();
 
 branch->QueryColliding( &queryItem, obstacles, opts );
 
 for( const PNS::OBSTACLE& obs : obstacles )
 {
 PNS::ITEM* item = obs.m_item;
 
 if( !item->OfKind( PNS::ITEM::SEGMENT_T | PNS::ITEM::ARC_T ) )
 continue;
 
 if( PNS::LINKED_ITEM* li = dynamic_cast<PNS::LINKED_ITEM*>( item ) )
 {
 if( lineWidth == 0 || li->Width() < lineWidth )
 lineWidth = li->Width();
 }
 
 if( chain->PointInside( item->Anchor( 0 ), 10 )
 && chain->PointInside( item->Anchor( 1 ), 10 ) )
 {
 branch->Remove( item );
 }
 }
 
 if( lineWidth == 0 )
 lineWidth = pcbIUScale.mmToIU( 0.1 ); // Fallback
 
 if( baselineValid() )
 {
 NETINFO_ITEM* recoverNet = GetBoard()->FindNet( m_lastNetName );
 PNS::LINE recoverLine;
 
 recoverLine.SetLayer( m_layer );
 recoverLine.SetWidth( lineWidth );
 recoverLine.Line() = *m_baseLine;
 recoverLine.SetNet( recoverNet );
 branch->Add( recoverLine, false );
 
 if( m_tuningMode == DIFF_PAIR || m_tuningMode == DIFF_PAIR_SKEW )
 {
 NETINFO_ITEM* recoverCoupledNet = GetBoard()->DpCoupledNet( recoverNet );
 PNS::LINE recoverLineCoupled;
 
 recoverLineCoupled.SetLayer( m_layer );
 recoverLineCoupled.SetWidth( lineWidth );
 recoverLineCoupled.Line() = *m_baseLineCoupled;
 recoverLineCoupled.SetNet( recoverCoupledNet );
 branch->Add( recoverLineCoupled, false );
 }
 }
 
 aRouter->CommitRouting( branch );
 
 //wxLogWarning( "PNS baseline recovered" );
 
 return true;
}
 
 
bool PCB_TUNING_PATTERN::resetToBaseline( GENERATOR_TOOL* aTool, int aLayer,
 SHAPE_LINE_CHAIN& aBaseLine, bool aPrimary )
{
 PNS_KICAD_IFACE* iface = aTool->GetInterface();
 PNS::ROUTER* router = aTool->Router();
 PNS::NODE* world = router->GetWorld();
 VECTOR2I startSnapPoint, endSnapPoint;
 
 std::optional<PNS::LINE> pnsLine = getPNSLine( aBaseLine.CPoint( 0 ), aBaseLine.CPoint( -1 ),
 router, aLayer, startSnapPoint, endSnapPoint );
 
 if( !pnsLine )
 {
 // TODO
 //recoverBaseline( aRouter );
 return true;
 }
 
 PNS::NODE* branch = world->Branch();
 
 SHAPE_LINE_CHAIN straightChain;
 {
 SHAPE_LINE_CHAIN pre, mid, post;
 pnsLine->CLine().Split( startSnapPoint, endSnapPoint, pre, mid, post );
 
 straightChain.Append( pre );
 straightChain.Append( aBaseLine );
 straightChain.Append( post );
 straightChain.Simplify();
 }
 
 branch->Remove( *pnsLine );
 
 SHAPE_LINE_CHAIN newLineChain;
 
 if( aPrimary )
 {
 m_origin = straightChain.NearestPoint( m_origin );
 m_end = straightChain.NearestPoint( m_end );
 
 // Don't allow points too close
 if( ( m_end - m_origin ).EuclideanNorm() < pcbIUScale.mmToIU( 0.1 ) )
 {
 m_origin = startSnapPoint;
 m_end = endSnapPoint;
 }
 
 {
 SHAPE_LINE_CHAIN pre, mid, post;
 straightChain.Split( m_origin, m_end, pre, mid, post );
 
 newLineChain.Append( pre );
 newLineChain.Append( mid );
 newLineChain.Append( post );
 
 m_baseLine = mid;
 }
 }
 else
 {
 VECTOR2I start = straightChain.NearestPoint( m_origin );
 VECTOR2I end = straightChain.NearestPoint( m_end );
 
 {
 SHAPE_LINE_CHAIN pre, mid, post;
 straightChain.Split( start, end, pre, mid, post );
 
 newLineChain.Append( pre );
 newLineChain.Append( mid );
 newLineChain.Append( post );
 
 m_baseLineCoupled = mid;
 }
 }
 
 PNS::LINE newLine( *pnsLine, newLineChain );
 
 branch->Add( newLine, false );
 router->CommitRouting( branch );
 
 int clearance = router->GetRuleResolver()->Clearance( &newLine, nullptr );
 
 iface->DisplayItem( &newLine, clearance, true, PNS_COLLISION );
 
 return true;
}
 
 
bool PCB_TUNING_PATTERN::Update( GENERATOR_TOOL* aTool, BOARD* aBoard, BOARD_COMMIT* aCommit )
{
 if( !( GetFlags() & IN_EDIT ) )
 return false;
 
 KIGFX::VIEW* view = aTool->GetManager()->GetView();
 PNS::ROUTER* router = aTool->Router();
 PNS_KICAD_IFACE* iface = aTool->GetInterface();
 int layer = GetLayer();
 
 auto hideRemovedItems = [&]( bool aHide )
 {
 if( view )
 {
 for( const GENERATOR_PNS_CHANGES& pnsCommit : aTool->GetRouterChanges() )
 {
 for( BOARD_ITEM* item : pnsCommit.removedItems )
 {
 if( view )
 view->Hide( item, aHide, aHide );
 }
 }
 }
 };
 
 iface->SetStartLayer( layer );
 
 if( router->RoutingInProgress() )
 {
 router->StopRouting();
 }
 
 if( !baselineValid() )
 {
 initBaseLines( router, layer, aBoard );
 }
 else
 {
 if( resetToBaseline( aTool, layer, *m_baseLine, true ) )
 {
 m_origin = m_baseLine->CPoint( 0 );
 m_end = m_baseLine->CPoint( -1 );
 }
 else
 {
 //initBaseLines( router, layer, aBoard );
 return false;
 }
 
 if( m_tuningMode == DIFF_PAIR )
 {
 if( !resetToBaseline( aTool, layer, *m_baseLineCoupled, false ) )
 {
 initBaseLines( router, layer, aBoard );
 return false;
 }
 }
 }
 
 hideRemovedItems( true );
 // Snap points
 VECTOR2I startSnapPoint, endSnapPoint;
 
 wxCHECK( m_baseLine, false );
 
 PNS::LINKED_ITEM* startItem = pickSegment( router, m_origin, layer, startSnapPoint, *m_baseLine);
 PNS::LINKED_ITEM* endItem = pickSegment( router, m_end, layer, endSnapPoint, *m_baseLine );
 
 wxASSERT( startItem );
 wxASSERT( endItem );
 
 if( !startItem || !endItem )
 return false;
 
 router->SetMode( GetPNSMode() );
 
 if( !router->StartRouting( startSnapPoint, startItem, layer ) )
 {
 //recoverBaseline( router );
 return false;
 }
 
 PNS::MEANDER_PLACER_BASE* placer = static_cast<PNS::MEANDER_PLACER_BASE*>( router->Placer() );
 
 m_settings.m_keepEndpoints = true; // Required for re-grouping
 placer->UpdateSettings( m_settings );
 
 router->Move( m_end, nullptr );
 
 if( PNS::DP_MEANDER_PLACER* dpPlacer = dynamic_cast<PNS::DP_MEANDER_PLACER*>( placer ) )
 {
 m_trackWidth = dpPlacer->GetOriginPair().Width();
 m_diffPairGap = dpPlacer->GetOriginPair().Gap();
 }
 else
 {
 m_trackWidth = startItem->Width();
 m_diffPairGap = router->Sizes().DiffPairGap();
 }
 
 m_settings = placer->MeanderSettings();
 m_lastNetName = iface->GetNetName( startItem->Net() );
 m_tuningStatus = placer->TuningStatus();
 
 wxString statusMessage;
 
 switch ( m_tuningStatus )
 {
 case PNS::MEANDER_PLACER_BASE::TOO_LONG: statusMessage = _( "too long" ); break;
 case PNS::MEANDER_PLACER_BASE::TOO_SHORT: statusMessage = _( "too short" ); break;
 case PNS::MEANDER_PLACER_BASE::TUNED: statusMessage = _( "tuned" ); break;
 default: statusMessage = _( "unknown" ); break;
 }
 
 wxString result;
 EDA_UNITS userUnits = EDA_UNITS::MILLIMETRES;
 
 if( aTool->GetManager()->GetSettings() )
 userUnits = static_cast<EDA_UNITS>( aTool->GetManager()->GetSettings()->m_System.units );
 
 result = EDA_UNIT_UTILS::UI::MessageTextFromValue( pcbIUScale, userUnits,
 (double) placer->TuningResult() );
 
 m_tuningInfo.Printf( wxS( "%s (%s)" ), result, statusMessage );
 
 return true;
}
 
 
void PCB_TUNING_PATTERN::EditPush( GENERATOR_TOOL* aTool, BOARD* aBoard, BOARD_COMMIT* aCommit,
 const wxString& aCommitMsg, int aCommitFlags )
{
 if( !( GetFlags() & IN_EDIT ) )
 return;
 
 ClearFlags( IN_EDIT );
 
 KIGFX::VIEW* view = aTool->GetManager()->GetView();
 PNS::ROUTER* router = aTool->Router();
 PNS_KICAD_IFACE* iface = aTool->GetInterface();
 SHAPE_LINE_CHAIN bounds = getOutline();
 int epsilon = aBoard->GetDesignSettings().GetDRCEpsilon();
 
 iface->EraseView();
 
 if( router->RoutingInProgress() )
 {
 bool forceFinish = true;
 bool forceCommit = false;
 
 router->FixRoute( m_end, nullptr, forceFinish, forceCommit );
 router->StopRouting();
 }
 
 const std::vector<GENERATOR_PNS_CHANGES>& pnsCommits = aTool->GetRouterChanges();
 
 for( const GENERATOR_PNS_CHANGES& pnsCommit : pnsCommits )
 {
 const std::set<BOARD_ITEM*> routerRemovedItems = pnsCommit.removedItems;
 const std::set<BOARD_ITEM*> routerAddedItems = pnsCommit.addedItems;
 
 //std::cout << "Push commits << " << allPnsChanges.size() << " routerRemovedItems "
 // << routerRemovedItems.size() << " routerAddedItems " << routerAddedItems.size()
 // << " m_removedItems " << m_removedItems.size() << std::endl;
 
 for( BOARD_ITEM* item : routerRemovedItems )
 {
 if( view )
 view->Hide( item, false );
 
 aCommit->Remove( item );
 }
 
 for( BOARD_ITEM* item : routerAddedItems )
 {
 if( PCB_TRACK* track = dynamic_cast<PCB_TRACK*>( item ) )
 {
 if( bounds.PointInside( track->GetStart(), epsilon )
 && bounds.PointInside( track->GetEnd(), epsilon ) )
 {
 AddItem( item );
 aCommit->Stage( item, CHT_GROUP );
 }
 }
 
 aCommit->Add( item );
 }
 }
 
 if( aCommitMsg.IsEmpty() )
 aCommit->Push( _( "Edit Tuning Pattern" ), aCommitFlags );
 else
 aCommit->Push( aCommitMsg, aCommitFlags );
}
 
 
void PCB_TUNING_PATTERN::EditRevert( GENERATOR_TOOL* aTool, BOARD* aBoard, BOARD_COMMIT* aCommit )
{
 if( !( GetFlags() & IN_EDIT ) )
 return;
 
 ClearFlags( IN_EDIT );
 
 PNS_KICAD_IFACE* iface = aTool->GetInterface();
 
 iface->EraseView();
 
 if( KIGFX::VIEW* view = aTool->GetManager()->GetView() )
 {
 for( const GENERATOR_PNS_CHANGES& pnsCommit : aTool->GetRouterChanges() )
 {
 for( BOARD_ITEM* item : pnsCommit.removedItems )
 view->Hide( item, false );
 }
 }
 
 aTool->Router()->StopRouting();
 
 if( aCommit )
 aCommit->Revert();
}
 
 
bool PCB_TUNING_PATTERN::MakeEditPoints( std::shared_ptr<EDIT_POINTS> points ) const
{
 VECTOR2I centerlineOffset;
 VECTOR2I centerlineOffsetEnd;
 
 if( m_tuningMode == DIFF_PAIR && m_baseLineCoupled && m_baseLineCoupled->SegmentCount() > 0 )
 {
 centerlineOffset = ( m_baseLineCoupled->CPoint( 0 ) - m_origin ) / 2;
 centerlineOffsetEnd = ( m_baseLineCoupled->CPoint( -1 ) - m_end ) / 2;
 }
 
 points->AddPoint( m_origin + centerlineOffset );
 points->AddPoint( m_end + centerlineOffsetEnd );
 
 SEG base = m_baseLine && m_baseLine->SegmentCount() > 0 ? m_baseLine->CSegment( 0 )
 : SEG( m_origin, m_end );
 
 base.A += centerlineOffset;
 base.B += centerlineOffset;
 
 int amplitude = m_settings.m_maxAmplitude + KiROUND( m_trackWidth / 2.0 );
 
 if( m_tuningMode == DIFF_PAIR )
 amplitude += m_trackWidth + m_diffPairGap;
 
 if( m_settings.m_initialSide == -1 )
 amplitude *= -1;
 
 VECTOR2I widthHandleOffset = ( base.B - base.A ).Perpendicular().Resize( amplitude );
 
 points->AddPoint( base.A + widthHandleOffset );
 points->Point( 2 ).SetGridConstraint( IGNORE_GRID );
 
 VECTOR2I spacingHandleOffset =
 widthHandleOffset + ( base.B - base.A ).Resize( KiROUND( m_settings.m_spacing * 1.5 ) );
 
 points->AddPoint( base.A + spacingHandleOffset );
 points->Point( 3 ).SetGridConstraint( IGNORE_GRID );
 
 return true;
}
 
 
bool PCB_TUNING_PATTERN::UpdateFromEditPoints( std::shared_ptr<EDIT_POINTS> aEditPoints,
 BOARD_COMMIT* aCommit )
{
 VECTOR2I centerlineOffset;
 VECTOR2I centerlineOffsetEnd;
 
 if( m_tuningMode == DIFF_PAIR && m_baseLineCoupled && m_baseLineCoupled->SegmentCount() > 0 )
 {
 centerlineOffset = ( m_baseLineCoupled->CPoint( 0 ) - m_origin ) / 2;
 centerlineOffsetEnd = ( m_baseLineCoupled->CPoint( -1 ) - m_end ) / 2;
 }
 
 SEG base = m_baseLine && m_baseLine->SegmentCount() > 0 ? m_baseLine->CSegment( 0 )
 : SEG( m_origin, m_end );
 
 base.A += centerlineOffset;
 base.B += centerlineOffset;
 
 m_origin = aEditPoints->Point( 0 ).GetPosition() - centerlineOffset;
 m_end = aEditPoints->Point( 1 ).GetPosition() - centerlineOffsetEnd;
 
 if( aEditPoints->Point( 2 ).IsActive() )
 {
 VECTOR2I wHandle = aEditPoints->Point( 2 ).GetPosition();
 
 int value = base.LineDistance( wHandle );
 
 value -= KiROUND( m_trackWidth / 2.0 );
 
 if( m_tuningMode == DIFF_PAIR )
 value -= m_trackWidth + m_diffPairGap;
 
 SetMaxAmplitude( KiROUND( value / pcbIUScale.mmToIU( 0.01 ) ) * pcbIUScale.mmToIU( 0.01 ) );
 
 int side = base.Side( wHandle );
 
 if( side < 0 )
 m_settings.m_initialSide = PNS::MEANDER_SIDE_LEFT;
 else
 m_settings.m_initialSide = PNS::MEANDER_SIDE_RIGHT;
 }
 
 if( aEditPoints->Point( 3 ).IsActive() )
 {
 VECTOR2I wHandle = aEditPoints->Point( 2 ).GetPosition();
 VECTOR2I sHandle = aEditPoints->Point( 3 ).GetPosition();
 
 int value = KiROUND( SEG( base.A, wHandle ).LineDistance( sHandle ) / 1.5 );
 
 SetSpacing( KiROUND( value / pcbIUScale.mmToIU( 0.01 ) ) * pcbIUScale.mmToIU( 0.01 ) );
 }
 
 return true;
}
 
 
bool PCB_TUNING_PATTERN::UpdateEditPoints( std::shared_ptr<EDIT_POINTS> aEditPoints )
{
 VECTOR2I centerlineOffset;
 VECTOR2I centerlineOffsetEnd;
 
 if( m_tuningMode == DIFF_PAIR && m_baseLineCoupled && m_baseLineCoupled->SegmentCount() > 0 )
 {
 centerlineOffset = ( m_baseLineCoupled->CPoint( 0 ) - m_origin ) / 2;
 centerlineOffsetEnd = ( m_baseLineCoupled->CPoint( -1 ) - m_end ) / 2;
 }
 
 SEG base = m_baseLine && m_baseLine->SegmentCount() > 0 ? m_baseLine->CSegment( 0 )
 : SEG( m_origin, m_end );
 
 base.A += centerlineOffset;
 base.B += centerlineOffset;
 
 int amplitude = m_settings.m_maxAmplitude + KiROUND( m_trackWidth / 2.0 );
 
 if( m_tuningMode == DIFF_PAIR )
 amplitude += m_trackWidth + m_diffPairGap;
 
 if( m_settings.m_initialSide == -1 )
 amplitude *= -1;
 
 VECTOR2I widthHandleOffset = ( base.B - base.A ).Perpendicular().Resize( amplitude );
 
 aEditPoints->Point( 0 ).SetPosition( m_origin + centerlineOffset );
 aEditPoints->Point( 1 ).SetPosition( m_end + centerlineOffsetEnd );
 
 aEditPoints->Point( 2 ).SetPosition( base.A + widthHandleOffset );
 
 VECTOR2I spacingHandleOffset =
 widthHandleOffset + ( base.B - base.A ).Resize( KiROUND( m_settings.m_spacing * 1.5 ) );
 
 aEditPoints->Point( 3 ).SetPosition( base.A + spacingHandleOffset );
 
 return true;
}
 
 
SHAPE_LINE_CHAIN PCB_TUNING_PATTERN::getOutline() const
{
 if( m_baseLine )
 {
 int clampedMaxAmplitude = m_settings.m_maxAmplitude;
 int minAllowedAmplitude = 0;
 int baselineOffset = m_tuningMode == DIFF_PAIR ? ( m_diffPairGap + m_trackWidth ) / 2 : 0;
 
 if( m_settings.m_cornerStyle == PNS::MEANDER_STYLE::MEANDER_STYLE_ROUND )
 {
 minAllowedAmplitude = baselineOffset + m_trackWidth;
 }
 else
 {
 int correction = m_trackWidth * tan( 1 - tan( DEG2RAD( 22.5 ) ) );
 minAllowedAmplitude = baselineOffset + correction;
 }
 
 clampedMaxAmplitude = std::max( clampedMaxAmplitude, minAllowedAmplitude );
 
 if( m_settings.m_singleSided )
 {
 SHAPE_LINE_CHAIN clBase = *m_baseLine;
 SHAPE_LINE_CHAIN left, right;
 
 if( m_tuningMode != DIFF_PAIR )
 {
 int amplitude = clampedMaxAmplitude + KiROUND( m_trackWidth / 2.0 );
 
 SHAPE_LINE_CHAIN chain;
 
 if( clBase.OffsetLine( amplitude, CORNER_STRATEGY::ROUND_ALL_CORNERS, ARC_LOW_DEF,
 left, right, true ) )
 {
 chain.Append( m_settings.m_initialSide >= 0 ? right : left );
 chain.Append( clBase.Reverse() );
 chain.SetClosed( true );
 
 return chain;
 }
 }
 else if( m_tuningMode == DIFF_PAIR && m_baseLineCoupled )
 {
 int amplitude = clampedMaxAmplitude + m_trackWidth + KiROUND( m_diffPairGap / 2.0 );
 
 SHAPE_LINE_CHAIN clCoupled = *m_baseLineCoupled;
 SHAPE_LINE_CHAIN chain1, chain2;
 
 if( clBase.OffsetLine( amplitude, CORNER_STRATEGY::ROUND_ALL_CORNERS, ARC_LOW_DEF,
 left, right, true ) )
 {
 if( m_settings.m_initialSide >= 0 )
 chain1.Append( right );
 else
 chain1.Append( left );
 
 if( clBase.OffsetLine( KiROUND( m_trackWidth / 2.0 ),
 CORNER_STRATEGY::ROUND_ALL_CORNERS, ARC_LOW_DEF, left,
 right, true ) )
 {
 if( m_settings.m_initialSide >= 0 )
 chain1.Append( left.Reverse() );
 else
 chain1.Append( right.Reverse() );
 }
 
 chain1.SetClosed( true );
 }
 
 if( clCoupled.OffsetLine( amplitude, CORNER_STRATEGY::ROUND_ALL_CORNERS,
 ARC_LOW_DEF, left, right, true ) )
 {
 if( m_settings.m_initialSide >= 0 )
 chain2.Append( right );
 else
 chain2.Append( left );
 
 if( clCoupled.OffsetLine( KiROUND( m_trackWidth / 2.0 ),
 CORNER_STRATEGY::ROUND_ALL_CORNERS, ARC_LOW_DEF, left,
 right, true ) )
 {
 if( m_settings.m_initialSide >= 0 )
 chain2.Append( left.Reverse() );
 else
 chain2.Append( right.Reverse() );
 }
 
 chain2.SetClosed( true );
 }
 
 SHAPE_POLY_SET merged;
 merged.BooleanAdd( chain1, chain2, SHAPE_POLY_SET::PM_STRICTLY_SIMPLE );
 
 if( merged.OutlineCount() > 0 )
 return merged.Outline( 0 );
 }
 }
 
 // Not single-sided / fallback
 SHAPE_POLY_SET poly;
 SHAPE_LINE_CHAIN cl = *m_baseLine;
 
 int amplitude = 0;
 
 if( m_tuningMode == DIFF_PAIR )
 amplitude = clampedMaxAmplitude + m_diffPairGap / 2 + KiROUND( m_trackWidth );
 else
 amplitude = clampedMaxAmplitude + KiROUND( m_trackWidth / 2.0 );
 
 poly.OffsetLineChain( *m_baseLine, amplitude, CORNER_STRATEGY::ROUND_ALL_CORNERS,
 ARC_LOW_DEF, false );
 
 if( m_tuningMode == DIFF_PAIR && m_baseLineCoupled )
 {
 SHAPE_POLY_SET polyCoupled;
 polyCoupled.OffsetLineChain( *m_baseLineCoupled, amplitude,
 CORNER_STRATEGY::ROUND_ALL_CORNERS, ARC_LOW_DEF, false );
 
 SHAPE_POLY_SET merged;
 merged.BooleanAdd( poly, polyCoupled, SHAPE_POLY_SET::PM_STRICTLY_SIMPLE );
 
 if( merged.OutlineCount() > 0 )
 return merged.Outline( 0 );
 }
 
 if( poly.OutlineCount() > 0 )
 return poly.Outline( 0 );
 }
 
 return SHAPE_LINE_CHAIN();
}
 
 
void PCB_TUNING_PATTERN::ViewDraw( int aLayer, KIGFX::VIEW* aView ) const
{
 if( !IsSelected() && !IsNew() )
 return;
 
 KIGFX::PREVIEW::DRAW_CONTEXT ctx( *aView );
 
 int size = KiROUND( aView->ToWorld( EDIT_POINT::POINT_SIZE ) * 0.8 );
 size = std::max( size, pcbIUScale.mmToIU( 0.05 ) );
 
 if( !HasFlag( IN_EDIT ) )
 {
 if( m_baseLine )
 {
 for( int i = 0; i < m_baseLine->SegmentCount(); i++ )
 {
 SEG seg = m_baseLine->CSegment( i );
 ctx.DrawLineDashed( seg.A, seg.B, size, size / 6, true );
 }
 }
 else
 {
 ctx.DrawLineDashed( m_origin, m_end, size, size / 6, false );
 }
 
 if( m_tuningMode == DIFF_PAIR && m_baseLineCoupled )
 {
 for( int i = 0; i < m_baseLineCoupled->SegmentCount(); i++ )
 {
 SEG seg = m_baseLineCoupled->CSegment( i );
 ctx.DrawLineDashed( seg.A, seg.B, size, size / 6, true );
 }
 }
 }
 
 SHAPE_LINE_CHAIN chain = getOutline();
 
 for( int i = 0; i < chain.SegmentCount(); i++ )
 {
 SEG seg = chain.Segment( i );
 ctx.DrawLineDashed( seg.A, seg.B, size, size / 2, false );
 }
}
 
 
const STRING_ANY_MAP PCB_TUNING_PATTERN::GetProperties() const
{
 STRING_ANY_MAP props = PCB_GENERATOR::GetProperties();
 
 props.set( "tuning_mode", tuningToString( m_tuningMode ) );
 props.set( "initial_side", sideToString( m_settings.m_initialSide ) );
 props.set( "last_status", statusToString( m_tuningStatus ) );
 
 props.set( "end", m_end );
 props.set( "corner_radius_percent", m_settings.m_cornerRadiusPercentage );
 props.set( "single_sided", m_settings.m_singleSided );
 props.set( "rounded", m_settings.m_cornerStyle == PNS::MEANDER_STYLE_ROUND );
 
 props.set_iu( "max_amplitude", m_settings.m_maxAmplitude );
 props.set_iu( "min_amplitude", m_settings.m_minAmplitude );
 props.set_iu( "min_spacing", m_settings.m_spacing );
 props.set_iu( "target_length_min", m_settings.m_targetLength.Min() );
 props.set_iu( "target_length", m_settings.m_targetLength.Opt() );
 props.set_iu( "target_length_max", m_settings.m_targetLength.Max() );
 props.set_iu( "target_skew_min", m_settings.m_targetSkew.Min() );
 props.set_iu( "target_skew", m_settings.m_targetSkew.Opt() );
 props.set_iu( "target_skew_max", m_settings.m_targetSkew.Max() );
 props.set_iu( "last_track_width", m_trackWidth );
 props.set_iu( "last_diff_pair_gap", m_diffPairGap );
 
 props.set( "last_netname", m_lastNetName );
 props.set( "last_tuning", m_tuningInfo );
 props.set( "override_custom_rules", m_settings.m_overrideCustomRules );
 
 if( m_baseLine )
 props.set( "base_line", wxAny( *m_baseLine ) );
 
 if( m_baseLineCoupled )
 props.set( "base_line_coupled", wxAny( *m_baseLineCoupled ) );
 
 return props;
}
 
 
void PCB_TUNING_PATTERN::SetProperties( const STRING_ANY_MAP& aProps )
{
 PCB_GENERATOR::SetProperties( aProps );
 
 wxString tuningMode;
 aProps.get_to( "tuning_mode", tuningMode );
 m_tuningMode = tuningFromString( tuningMode.utf8_string() );
 
 wxString side;
 aProps.get_to( "initial_side", side );
 m_settings.m_initialSide = sideFromString( side.utf8_string() );
 
 wxString status;
 aProps.get_to( "last_status", status );
 m_tuningStatus = statusFromString( status.utf8_string() );
 
 aProps.get_to( "end", m_end );
 aProps.get_to( "corner_radius_percent", m_settings.m_cornerRadiusPercentage );
 aProps.get_to( "single_sided", m_settings.m_singleSided );
 aProps.get_to( "side", m_settings.m_initialSide );
 
 bool rounded = false;
 aProps.get_to( "rounded", rounded );
 m_settings.m_cornerStyle = rounded ? PNS::MEANDER_STYLE_ROUND : PNS::MEANDER_STYLE_CHAMFER;
 
 long long int val;
 
 aProps.get_to_iu( "target_length", val );
 m_settings.SetTargetLength( val );
 
 if( aProps.get_to_iu( "target_length_min", val ) )
 m_settings.m_targetLength.SetMin( val );
 
 if( aProps.get_to_iu( "target_length_max", val ) )
 m_settings.m_targetLength.SetMax( val );
 
 int int_val;
 
 aProps.get_to_iu( "target_skew", int_val );
 m_settings.SetTargetSkew( int_val );
 
 if( aProps.get_to_iu( "target_skew_min", int_val ) )
 m_settings.m_targetSkew.SetMin( int_val );
 
 if( aProps.get_to_iu( "target_skew_max", int_val ) )
 m_settings.m_targetSkew.SetMax( int_val );
 
 aProps.get_to_iu( "max_amplitude", m_settings.m_maxAmplitude );
 aProps.get_to_iu( "min_amplitude", m_settings.m_minAmplitude );
 aProps.get_to_iu( "min_spacing", m_settings.m_spacing );
 aProps.get_to_iu( "last_track_width", m_trackWidth );
 aProps.get_to_iu( "last_diff_pair_gap", m_diffPairGap );
 aProps.get_to( "override_custom_rules", m_settings.m_overrideCustomRules );
 
 aProps.get_to( "last_netname", m_lastNetName );
 aProps.get_to( "last_tuning", m_tuningInfo );
 
 if( auto baseLine = aProps.get_opt<SHAPE_LINE_CHAIN>( "base_line" ) )
 m_baseLine = *baseLine;
 
 if( auto baseLineCoupled = aProps.get_opt<SHAPE_LINE_CHAIN>( "base_line_coupled" ) )
 m_baseLineCoupled = *baseLineCoupled;
}
 
 
void PCB_TUNING_PATTERN::ShowPropertiesDialog( PCB_BASE_EDIT_FRAME* aEditFrame )
{
 PNS::MEANDER_SETTINGS settings = m_settings;
 DRC_CONSTRAINT constraint;
 
 if( !m_items.empty() )
 {
 BOARD_ITEM* startItem = *m_items.begin();
 std::shared_ptr<DRC_ENGINE>& drcEngine = GetBoard()->GetDesignSettings().m_DRCEngine;
 
 constraint = drcEngine->EvalRules( LENGTH_CONSTRAINT, startItem, nullptr, GetLayer() );
 
 if( !constraint.IsNull() && !settings.m_overrideCustomRules )
 settings.SetTargetLength( constraint.GetValue() );
 }
 
 DIALOG_TUNING_PATTERN_PROPERTIES dlg( aEditFrame, settings, GetPNSMode(), constraint );
 
 if( dlg.ShowModal() == wxID_OK )
 {
 BOARD_COMMIT commit( aEditFrame );
 commit.Modify( this );
 m_settings = settings;
 
 GENERATOR_TOOL* generatorTool = aEditFrame->GetToolManager()->GetTool<GENERATOR_TOOL>();
 EditStart( generatorTool, GetBoard(), &commit );
 Update( generatorTool, GetBoard(), &commit );
 EditPush( generatorTool, GetBoard(), &commit );
 }
}
 
 
std::vector<EDA_ITEM*> PCB_TUNING_PATTERN::GetPreviewItems( GENERATOR_TOOL* aTool,
 PCB_BASE_EDIT_FRAME* aFrame,
 bool aStatusItemsOnly )
{
 std::vector<EDA_ITEM*> previewItems;
 KIGFX::VIEW* view = aFrame->GetCanvas()->GetView();
 
 if( auto* placer = dynamic_cast<PNS::MEANDER_PLACER_BASE*>( aTool->Router()->Placer() ) )
 {
 if( !aStatusItemsOnly )
 {
 PNS::ITEM_SET items = placer->TunedPath();
 
 for( PNS::ITEM* item : items )
 previewItems.push_back( new ROUTER_PREVIEW_ITEM( item, view, PNS_HOVER_ITEM ) );
 }
 
 TUNING_STATUS_VIEW_ITEM* statusItem = new TUNING_STATUS_VIEW_ITEM( aFrame );
 
 if( m_tuningMode == DIFF_PAIR_SKEW )
 {
 statusItem->SetMinMax( m_settings.m_targetSkew.Min(), m_settings.m_targetSkew.Max() );
 }
 else
 {
 if( m_settings.m_targetLength.Opt() == PNS::MEANDER_SETTINGS::LENGTH_UNCONSTRAINED )
 {
 statusItem->ClearMinMax();
 }
 else
 {
 statusItem->SetMinMax( (double) m_settings.m_targetLength.Min(),
 (double) m_settings.m_targetLength.Max() );
 }
 }
 
 if( m_tuningMode == DIFF_PAIR_SKEW )
 statusItem->SetCurrent( (double) placer->TuningResult(), _( "current skew" ) );
 else
 statusItem->SetCurrent( (double) placer->TuningResult(), _( "current length" ) );
 
 statusItem->SetPosition( aFrame->GetToolManager()->GetMousePosition() );
 previewItems.push_back( statusItem );
 }
 
 return previewItems;
}
 
 
void PCB_TUNING_PATTERN::GetMsgPanelInfo( EDA_DRAW_FRAME* aFrame,
 std::vector<MSG_PANEL_ITEM>& aList )
{
 wxString msg;
 NETINFO_ITEM* primaryNet = nullptr;
 NETINFO_ITEM* coupledNet = nullptr;
 PCB_TRACK* primaryItem = nullptr;
 PCB_TRACK* coupledItem = nullptr;
 NETCLASS* netclass = nullptr;
 int width = 0;
 bool mixedWidth = false;
 
 aList.emplace_back( _( "Type" ), GetFriendlyName() );
 
 for( BOARD_ITEM* member : GetItems() )
 {
 if( PCB_TRACK* track = dynamic_cast<PCB_TRACK*>( member ) )
 {
 if( !primaryNet )
 {
 primaryItem = track;
 primaryNet = track->GetNet();
 }
 else if( !coupledNet && track->GetNet() != primaryNet )
 {
 coupledItem = track;
 coupledNet = track->GetNet();
 }
 
 if( !netclass )
 netclass = track->GetEffectiveNetClass();
 
 if( !width )
 width = track->GetWidth();
 else if( width != track->GetWidth() )
 mixedWidth = true;
 }
 }
 
 if( coupledNet )
 {
 aList.emplace_back( _( "Nets" ), UnescapeString( primaryNet->GetNetname() )
 + wxS( ", " )
 + UnescapeString( coupledNet->GetNetname() ) );
 }
 else if( primaryNet )
 {
 aList.emplace_back( _( "Net" ), UnescapeString( primaryNet->GetNetname() ) );
 }
 
 if( netclass )
 aList.emplace_back( _( "Resolved Netclass" ), UnescapeString( netclass->GetName() ) );
 
 aList.emplace_back( _( "Layer" ), layerMaskDescribe() );
 
 if( width && !mixedWidth )
 aList.emplace_back( _( "Width" ), aFrame->MessageTextFromValue( width ) );
 
 BOARD* board = GetBoard();
 std::shared_ptr<DRC_ENGINE>& drcEngine = board->GetDesignSettings().m_DRCEngine;
 DRC_CONSTRAINT constraint;
 
 // Display full track length (in Pcbnew)
 if( board && primaryItem && primaryItem->GetNetCode() > 0 )
 {
 int count;
 double trackLen;
 double lenPadToDie;
 
 std::tie( count, trackLen, lenPadToDie ) = board->GetTrackLength( *primaryItem );
 
 if( coupledItem && coupledItem->GetNetCode() > 0 )
 {
 double coupledLen;
 std::tie( count, coupledLen, lenPadToDie ) = board->GetTrackLength( *coupledItem );
 
 aList.emplace_back( _( "Routed Lengths" ), aFrame->MessageTextFromValue( trackLen )
 + wxS( ", " )
 + aFrame->MessageTextFromValue( coupledLen ) );
 }
 else
 {
 aList.emplace_back( _( "Routed Length" ), aFrame->MessageTextFromValue( trackLen ) );
 }
 
 if( lenPadToDie != 0 )
 {
 msg = aFrame->MessageTextFromValue( lenPadToDie );
 aList.emplace_back( _( "Pad To Die Length" ), msg );
 
 msg = aFrame->MessageTextFromValue( trackLen + lenPadToDie );
 aList.emplace_back( _( "Full Length" ), msg );
 }
 }
 
 if( m_tuningMode == DIFF_PAIR_SKEW )
 {
 constraint = drcEngine->EvalRules( SKEW_CONSTRAINT, primaryItem, coupledItem, m_layer );
 
 if( constraint.IsNull() || m_settings.m_overrideCustomRules )
 {
 msg = aFrame->MessageTextFromValue( m_settings.m_targetSkew.Opt() );
 
 aList.emplace_back( wxString::Format( _( "Target Skew: %s" ), msg ),
 wxString::Format( _( "(from tuning pattern properties)" ) ) );
 }
 else
 {
 msg = aFrame->MessageTextFromMinOptMax( constraint.GetValue() );
 
 if( !msg.IsEmpty() )
 {
 aList.emplace_back( wxString::Format( _( "Skew Constraints: %s" ), msg ),
 wxString::Format( _( "(from %s)" ), constraint.GetName() ) );
 }
 }
 }
 else
 {
 constraint = drcEngine->EvalRules( LENGTH_CONSTRAINT, primaryItem, coupledItem, m_layer );
 
 if( constraint.IsNull() || m_settings.m_overrideCustomRules )
 {
 msg = aFrame->MessageTextFromValue( (double) m_settings.m_targetLength.Opt() );
 
 aList.emplace_back( wxString::Format( _( "Target Length: %s" ), msg ),
 wxString::Format( _( "(from tuning pattern properties)" ) ) );
 }
 else
 {
 msg = aFrame->MessageTextFromMinOptMax( constraint.GetValue() );
 
 if( !msg.IsEmpty() )
 {
 aList.emplace_back( wxString::Format( _( "Length Constraints: %s" ), msg ),
 wxString::Format( _( "(from %s)" ), constraint.GetName() ) );
 }
 }
 }
}
 
 
const wxString PCB_TUNING_PATTERN::DISPLAY_NAME = _HKI( "Tuning Pattern" );
const wxString PCB_TUNING_PATTERN::GENERATOR_TYPE = wxS( "tuning_pattern" );
 
 
using SCOPED_DRAW_MODE = SCOPED_SET_RESET<DRAWING_TOOL::MODE>;
 
 
#define HITTEST_THRESHOLD_PIXELS 5
 
 
int DRAWING_TOOL::PlaceTuningPattern( const TOOL_EVENT& aEvent )
{
 if( m_isFootprintEditor )
 return 0;
 
 if( m_inDrawingTool )
 return 0;
 
 REENTRANCY_GUARD guard( &m_inDrawingTool );
 
 m_toolMgr->RunAction( PCB_ACTIONS::selectionClear );
 
 m_frame->PushTool( aEvent );
 Activate();
 
 BOARD* board = m_frame->GetBoard();
 std::shared_ptr<DRC_ENGINE>& drcEngine = board->GetDesignSettings().m_DRCEngine;
 GENERATOR_TOOL* generatorTool = m_toolMgr->GetTool<GENERATOR_TOOL>();
 PNS::ROUTER* router = generatorTool->Router();
 LENGTH_TUNING_MODE mode = fromPNSMode( aEvent.Parameter<PNS::ROUTER_MODE>() );
 
 KIGFX::VIEW_CONTROLS* controls = getViewControls();
 PCB_SELECTION_TOOL* selectionTool = m_toolMgr->GetTool<PCB_SELECTION_TOOL>();
 GENERAL_COLLECTORS_GUIDE guide = m_frame->GetCollectorsGuide();
 SCOPED_DRAW_MODE scopedDrawMode( m_mode, MODE::TUNING );
 
 m_pickerItem = nullptr;
 m_tuningPattern = nullptr;
 
 // Add a VIEW_GROUP that serves as a preview for the new item
 m_preview.Clear();
 m_view->Add( &m_preview );
 
 auto setCursor =
 [&]()
 {
 m_frame->GetCanvas()->SetCurrentCursor( KICURSOR::BULLSEYE );
 controls->ShowCursor( true );
 };
 
 auto updateHoverStatus =
 [&]()
 {
 std::unique_ptr<PCB_TUNING_PATTERN> dummyPattern;
 
 if( m_pickerItem )
 {
 dummyPattern.reset( PCB_TUNING_PATTERN::CreateNew( generatorTool, m_frame,
 m_pickerItem, mode ) );
 dummyPattern->SetPosition( m_pickerItem->GetFocusPosition() );
 dummyPattern->SetEnd( m_pickerItem->GetFocusPosition() );
 }
 
 if( dummyPattern )
 {
 dummyPattern->EditStart( generatorTool, m_board, nullptr );
 dummyPattern->Update( generatorTool, m_board, nullptr );
 
 m_preview.FreeItems();
 
 for( EDA_ITEM* item : dummyPattern->GetPreviewItems( generatorTool, m_frame ) )
 m_preview.Add( item );
 
 generatorTool->Router()->StopRouting();
 
 m_view->Update( &m_preview );
 }
 else
 {
 m_preview.FreeItems();
 m_view->Update( &m_preview );
 }
 };
 
 auto updateTuningPattern =
 [&]()
 {
 if( m_tuningPattern && m_tuningPattern->GetPosition() != m_tuningPattern->GetEnd() )
 {
 m_tuningPattern->EditStart( generatorTool, m_board, nullptr );
 m_tuningPattern->Update( generatorTool, m_board, nullptr );
 
 m_preview.FreeItems();
 
 for( EDA_ITEM* item : m_tuningPattern->GetPreviewItems( generatorTool, m_frame,
 true ) )
 {
 m_preview.Add( item );
 }
 
 m_view->Update( &m_preview );
 }
 };
 
 // Set initial cursor
 setCursor();
 
 while( TOOL_EVENT* evt = Wait() )
 {
 setCursor();
 VECTOR2D cursorPos = controls->GetMousePosition();
 
 if( evt->IsCancelInteractive() || evt->IsActivate()
 || ( m_tuningPattern && evt->IsAction( &ACTIONS::undo ) ) )
 {
 if( m_tuningPattern )
 {
 // First click already made; clean up tuning pattern preview
 m_tuningPattern->EditRevert( generatorTool, m_board, nullptr );
 
 delete m_tuningPattern;
 m_tuningPattern = nullptr;
 }
 
 break;
 }
 else if( evt->IsMotion() )
 {
 if( !m_tuningPattern )
 {
 // First click not yet made; we're in highlight-net-under-cursor mode
 
 GENERAL_COLLECTOR collector;
 collector.m_Threshold = KiROUND( getView()->ToWorld( HITTEST_THRESHOLD_PIXELS ) );
 
 if( m_frame->GetDisplayOptions().m_ContrastModeDisplay != HIGH_CONTRAST_MODE::NORMAL )
 guide.SetIncludeSecondary( false );
 else
 guide.SetIncludeSecondary( true );
 
 collector.Collect( board, { PCB_TRACE_T, PCB_ARC_T }, cursorPos, guide );
 
 if( collector.GetCount() > 1 )
 selectionTool->GuessSelectionCandidates( collector, cursorPos );
 
 m_pickerItem = nullptr;
 
 if( collector.GetCount() > 0 )
 {
 double min_dist_sq = std::numeric_limits<double>::max();
 
 for( EDA_ITEM* candidate : collector )
 {
 VECTOR2I candidatePos;
 
 if( candidate->Type() == PCB_TRACE_T )
 {
 candidatePos = static_cast<PCB_TRACK*>( candidate )->GetCenter();
 }
 else if( candidate->Type() == PCB_ARC_T )
 {
 candidatePos = static_cast<PCB_ARC*>( candidate )->GetMid();
 }
 
 double dist_sq = ( cursorPos - candidatePos ).SquaredEuclideanNorm();
 
 if( dist_sq < min_dist_sq )
 {
 min_dist_sq = dist_sq;
 m_pickerItem = static_cast<BOARD_CONNECTED_ITEM*>( candidate );
 }
 }
 }
 
 updateHoverStatus();
 }
 else
 {
 // First click already made; we're in preview-tuning-pattern mode
 
 m_tuningPattern->SetEnd( cursorPos );
 updateTuningPattern();
 }
 }
 else if( evt->IsClick( BUT_LEFT ) )
 {
 if( m_pickerItem && !m_tuningPattern )
 {
 // First click; create a tuning pattern
 
 if( dynamic_cast<PCB_TUNING_PATTERN*>( m_pickerItem->GetParentGroup() ) )
 {
 m_frame->ShowInfoBarWarning( _( "Unable to tune segments inside other "
 "tuning patterns." ) );
 }
 else
 {
 m_preview.FreeItems();
 
 m_frame->SetActiveLayer( m_pickerItem->GetLayer() );
 m_tuningPattern = PCB_TUNING_PATTERN::CreateNew( generatorTool, m_frame,
 m_pickerItem, mode );
 
 int dummyDist;
 int dummyClearance = std::numeric_limits<int>::max() / 2;
 VECTOR2I closestPt;
 
 // With an artificially-large clearance this can't *not* collide, but the
 // if stmt keeps Coverity happy....
 if( m_pickerItem->GetEffectiveShape()->Collide( cursorPos, dummyClearance,
 &dummyDist, &closestPt ) )
 {
 m_tuningPattern->SetPosition( closestPt );
 m_tuningPattern->SetEnd( closestPt );
 }
 
 m_preview.Add( m_tuningPattern->Clone() );
 }
 }
 else if( m_pickerItem && m_tuningPattern )
 {
 // Second click; we're done
 BOARD_COMMIT commit( m_frame );
 
 m_tuningPattern->EditStart( generatorTool, m_board, &commit );
 m_tuningPattern->Update( generatorTool, m_board, &commit );
 m_tuningPattern->EditPush( generatorTool, m_board, &commit, _( "Tune" ) );
 
 for( BOARD_ITEM* item : m_tuningPattern->GetItems() )
 item->SetSelected();
 
 break;
 }
 }
 else if( evt->IsClick( BUT_RIGHT ) )
 {
 PCB_SELECTION dummy;
 m_menu.ShowContextMenu( dummy );
 }
 else if( evt->IsAction( &PCB_ACTIONS::spacingIncrease )
 || evt->IsAction( &PCB_ACTIONS::spacingDecrease ) )
 {
 if( m_tuningPattern )
 {
 auto* placer = static_cast<PNS::MEANDER_PLACER_BASE*>( router->Placer() );
 
 placer->SpacingStep( evt->IsAction( &PCB_ACTIONS::spacingIncrease ) ? 1 : -1 );
 m_tuningPattern->SetSpacing( placer->MeanderSettings().m_spacing );
 updateTuningPattern();
 }
 else
 {
 m_frame->ShowInfoBarWarning( _( "Select a track to tune first." ) );
 }
 }
 else if( evt->IsAction( &PCB_ACTIONS::amplIncrease )
 || evt->IsAction( &PCB_ACTIONS::amplDecrease ) )
 {
 if( m_tuningPattern )
 {
 auto* placer = static_cast<PNS::MEANDER_PLACER_BASE*>( router->Placer() );
 
 placer->AmplitudeStep( evt->IsAction( &PCB_ACTIONS::amplIncrease ) ? 1 : -1 );
 m_tuningPattern->SetMaxAmplitude( placer->MeanderSettings().m_maxAmplitude );
 updateTuningPattern();
 }
 else
 {
 m_frame->ShowInfoBarWarning( _( "Select a track to tune first." ) );
 }
 }
 else if( evt->IsAction( &PCB_ACTIONS::properties )
 || evt->IsAction( &PCB_ACTIONS::lengthTunerSettings ) )
 {
 if( m_tuningPattern )
 {
 DRC_CONSTRAINT constraint;
 
 if( !m_tuningPattern->GetItems().empty() )
 {
 BOARD_ITEM* startItem = *m_tuningPattern->GetItems().begin();
 
 constraint = drcEngine->EvalRules( LENGTH_CONSTRAINT, startItem, nullptr,
 startItem->GetLayer() );
 }
 
 DIALOG_TUNING_PATTERN_PROPERTIES dlg( m_frame, m_tuningPattern->GetSettings(),
 m_tuningPattern->GetPNSMode(), constraint );
 
 if( dlg.ShowModal() == wxID_OK )
 updateTuningPattern();
 }
 else
 {
 m_frame->ShowInfoBarWarning( _( "Select a track to tune first." ) );
 }
 }
 // TODO: It'd be nice to be able to say "don't allow any non-trivial editing actions",
 // but we don't at present have that, so we just knock out some of the egregious ones.
 else if( ZONE_FILLER_TOOL::IsZoneFillAction( evt ) )
 {
 wxBell();
 }
 else
 {
 evt->SetPassEvent();
 }
 
 controls->CaptureCursor( m_tuningPattern != nullptr );
 controls->SetAutoPan( m_tuningPattern != nullptr );
 }
 
 controls->CaptureCursor( false );
 controls->SetAutoPan( false );
 controls->ForceCursorPosition( false );
 controls->ShowCursor( false );
 m_frame->GetCanvas()->SetCurrentCursor( KICURSOR::ARROW );
 
 m_preview.FreeItems();
 m_view->Remove( &m_preview );
 
 m_frame->GetCanvas()->Refresh();
 
 if( m_tuningPattern )
 selectionTool->AddItemToSel( m_tuningPattern );
 
 m_frame->PopTool( aEvent );
 return 0;
}
 
 
static struct PCB_TUNING_PATTERN_DESC
{
 PCB_TUNING_PATTERN_DESC()
 {
 ENUM_MAP<LENGTH_TUNING_MODE>::Instance()
 .Map( LENGTH_TUNING_MODE::SINGLE, _HKI( "Single track" ) )
 .Map( LENGTH_TUNING_MODE::DIFF_PAIR, _HKI( "Differential pair" ) )
 .Map( LENGTH_TUNING_MODE::DIFF_PAIR_SKEW, _HKI( "Diff pair skew" ) );
 
 ENUM_MAP<PNS::MEANDER_SIDE>::Instance()
 .Map( PNS::MEANDER_SIDE_LEFT, _HKI( "Left" ) )
 .Map( PNS::MEANDER_SIDE_RIGHT, _HKI( "Right" ) )
 .Map( PNS::MEANDER_SIDE_DEFAULT, _HKI( "Default" ) );
 
 PROPERTY_MANAGER& propMgr = PROPERTY_MANAGER::Instance();
 REGISTER_TYPE( PCB_TUNING_PATTERN );
 propMgr.AddTypeCast( new TYPE_CAST<PCB_TUNING_PATTERN, PCB_GENERATOR> );
 propMgr.AddTypeCast( new TYPE_CAST<PCB_TUNING_PATTERN, BOARD_ITEM> );
 propMgr.InheritsAfter( TYPE_HASH( PCB_TUNING_PATTERN ), TYPE_HASH( PCB_GENERATOR ) );
 propMgr.InheritsAfter( TYPE_HASH( PCB_TUNING_PATTERN ), TYPE_HASH( BOARD_ITEM ) );
 
 const wxString groupTab = _HKI( "Pattern Properties" );
 
 propMgr.AddProperty( new PROPERTY<PCB_TUNING_PATTERN, int>(
 _HKI( "End X" ), &PCB_TUNING_PATTERN::SetEndX,
 &PCB_TUNING_PATTERN::GetEndX, PROPERTY_DISPLAY::PT_SIZE,
 ORIGIN_TRANSFORMS::ABS_X_COORD ),
 groupTab );
 
 propMgr.AddProperty( new PROPERTY<PCB_TUNING_PATTERN, int>(
 _HKI( "End Y" ), &PCB_TUNING_PATTERN::SetEndY,
 &PCB_TUNING_PATTERN::GetEndY, PROPERTY_DISPLAY::PT_SIZE,
 ORIGIN_TRANSFORMS::ABS_Y_COORD ),
 groupTab );
 
 propMgr.AddProperty( new PROPERTY_ENUM<PCB_TUNING_PATTERN, LENGTH_TUNING_MODE>(
 _HKI( "Tuning Mode" ),
 NO_SETTER( PCB_TUNING_PATTERN, LENGTH_TUNING_MODE ),
 &PCB_TUNING_PATTERN::GetTuningMode ),
 groupTab );
 
 propMgr.AddProperty( new PROPERTY<PCB_TUNING_PATTERN, int>(
 _HKI( "Min Amplitude" ),
 &PCB_TUNING_PATTERN::SetMinAmplitude,
 &PCB_TUNING_PATTERN::GetMinAmplitude,
 PROPERTY_DISPLAY::PT_SIZE, ORIGIN_TRANSFORMS::ABS_X_COORD ),
 groupTab );
 
 propMgr.AddProperty( new PROPERTY<PCB_TUNING_PATTERN, int>(
 _HKI( "Max Amplitude" ),
 &PCB_TUNING_PATTERN::SetMaxAmplitude,
 &PCB_TUNING_PATTERN::GetMaxAmplitude,
 PROPERTY_DISPLAY::PT_SIZE, ORIGIN_TRANSFORMS::ABS_X_COORD ),
 groupTab );
 
 propMgr.AddProperty( new PROPERTY_ENUM<PCB_TUNING_PATTERN, PNS::MEANDER_SIDE>(
 _HKI( "Initial Side" ),
 &PCB_TUNING_PATTERN::SetInitialSide,
 &PCB_TUNING_PATTERN::GetInitialSide ),
 groupTab );
 
 propMgr.AddProperty( new PROPERTY<PCB_TUNING_PATTERN, int>(
 _HKI( "Min Spacing" ), &PCB_TUNING_PATTERN::SetSpacing,
 &PCB_TUNING_PATTERN::GetSpacing, PROPERTY_DISPLAY::PT_SIZE,
 ORIGIN_TRANSFORMS::ABS_X_COORD ),
 groupTab );
 
 propMgr.AddProperty( new PROPERTY<PCB_TUNING_PATTERN, int>(
 _HKI( "Corner Radius %" ),
 &PCB_TUNING_PATTERN::SetCornerRadiusPercentage,
 &PCB_TUNING_PATTERN::GetCornerRadiusPercentage,
 PROPERTY_DISPLAY::PT_DEFAULT, ORIGIN_TRANSFORMS::NOT_A_COORD ),
 groupTab );
 
 auto isSkew =
 []( INSPECTABLE* aItem ) -> bool
 {
 if( PCB_TUNING_PATTERN* pattern = dynamic_cast<PCB_TUNING_PATTERN*>( aItem ) )
 return pattern->GetTuningMode() == DIFF_PAIR_SKEW;
 
 return false;
 };
 
 auto notIsSkew =
 [&]( INSPECTABLE* aItem ) -> bool
 {
 return !isSkew( aItem );
 };
 
 propMgr.AddProperty( new PROPERTY<PCB_TUNING_PATTERN, std::optional<int>>(
 _HKI( "Target Length" ),
 &PCB_TUNING_PATTERN::SetTargetLength,
 &PCB_TUNING_PATTERN::GetTargetLength,
 PROPERTY_DISPLAY::PT_SIZE, ORIGIN_TRANSFORMS::ABS_X_COORD ),
 groupTab )
 .SetAvailableFunc( notIsSkew );
 
 
 propMgr.AddProperty( new PROPERTY<PCB_TUNING_PATTERN, int>(
 _HKI( "Target Skew" ), &PCB_TUNING_PATTERN::SetTargetSkew,
 &PCB_TUNING_PATTERN::GetTargetSkew,
 PROPERTY_DISPLAY::PT_SIZE, ORIGIN_TRANSFORMS::ABS_X_COORD ),
 groupTab )
 .SetAvailableFunc( isSkew );
 
 
 propMgr.AddProperty( new PROPERTY<PCB_TUNING_PATTERN, bool>(
 _HKI( "Override Custom Rules" ),
 &PCB_TUNING_PATTERN::SetOverrideCustomRules,
 &PCB_TUNING_PATTERN::GetOverrideCustomRules ),
 groupTab );
 
 propMgr.AddProperty( new PROPERTY<PCB_TUNING_PATTERN, bool>(
 _HKI( "Single-sided" ),
 &PCB_TUNING_PATTERN::SetSingleSided,
 &PCB_TUNING_PATTERN::IsSingleSided ),
 groupTab );
 
 propMgr.AddProperty( new PROPERTY<PCB_TUNING_PATTERN, bool>(
 _HKI( "Rounded" ), &PCB_TUNING_PATTERN::SetRounded,
 &PCB_TUNING_PATTERN::IsRounded ),
 groupTab );
 }
} _PCB_TUNING_PATTERN_DESC;
 
ENUM_TO_WXANY( LENGTH_TUNING_MODE )
ENUM_TO_WXANY( PNS::MEANDER_SIDE )
 
static GENERATORS_MGR::REGISTER<PCB_TUNING_PATTERN> registerMe;
 
// Also register under the 7.99 name
template <typename T>
struct REGISTER_LEGACY_TUNING_PATTERN
{
 REGISTER_LEGACY_TUNING_PATTERN()
 {
 GENERATORS_MGR::Instance().Register( wxS( "meanders" ), T::DISPLAY_NAME,
 []()
 {
 return new T;
 } );
 }
};
 
static REGISTER_LEGACY_TUNING_PATTERN<PCB_TUNING_PATTERN> registerMeToo;