panel_setup_layers.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2009 Isaac Marino Bavaresco, [email protected]
 * Copyright (C) 2009 SoftPLC Corporation, Dick Hollenbeck <[email protected]>
 * Copyright (C) 2009-2024 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 <confirm.h>
#include <core/arraydim.h>
#include <core/kicad_algo.h>
#include <pcb_edit_frame.h>
#include <tool/tool_manager.h>
#include <tools/pcb_actions.h>
#include <board.h>
#include <collectors.h>
#include <footprint.h>
#include <pad.h>
#include <pcb_track.h>
#include <panel_setup_layers.h>
#include <board_stackup_manager/panel_board_stackup.h>
 
#include <wx/choicdlg.h>
#include <wx/msgdlg.h>
#include <eda_list_dialog.h>
 
 
// some define to choose how copper layers widgets are shown
 
// if defined, display only active copper layers
// if not displays always 1=the full set (32 copper layers)
#define HIDE_INACTIVE_LAYERS
 
 
static LSEQ dlg_layers()
{
 // Layers that are put out into the dialog UI, coordinate with wxformbuilder and
 // getCTLs( int aLayerNumber )
 static const PCB_LAYER_ID layers[] = {
 F_CrtYd,
 F_Fab,
 F_Adhes,
 F_Paste,
 F_SilkS,
 F_Mask,
 F_Cu,
 
 In1_Cu,
 In2_Cu,
 In3_Cu,
 In4_Cu,
 In5_Cu,
 In6_Cu,
 In7_Cu,
 In8_Cu,
 In9_Cu,
 In10_Cu,
 In11_Cu,
 In12_Cu,
 In13_Cu,
 In14_Cu,
 In15_Cu,
 
 In16_Cu,
 In17_Cu,
 In18_Cu,
 In19_Cu,
 In20_Cu,
 In21_Cu,
 In22_Cu,
 In23_Cu,
 In24_Cu,
 In25_Cu,
 In26_Cu,
 In27_Cu,
 In28_Cu,
 In29_Cu,
 In30_Cu,
 
 B_Cu,
 B_Mask,
 B_SilkS,
 B_Paste,
 B_Adhes,
 B_Fab,
 B_CrtYd,
 
 Edge_Cuts,
 Margin,
 Eco2_User,
 Eco1_User,
 Cmts_User,
 Dwgs_User,
 
 User_1,
 User_2,
 User_3,
 User_4,
 User_5,
 User_6,
 User_7,
 User_8,
 User_9,
 };
 
 return LSEQ( layers, layers + arrayDim( layers ) );
}
 
 
PANEL_SETUP_LAYERS::PANEL_SETUP_LAYERS( wxWindow* aParentWindow, PCB_EDIT_FRAME* aFrame ) :
 PANEL_SETUP_LAYERS_BASE( aParentWindow ),
 m_frame( aFrame ),
 m_physicalStackup( nullptr ),
 m_initialized( false )
{
 m_pcb = aFrame->GetBoard();
}
 
 
PANEL_SETUP_LAYERS_CTLs PANEL_SETUP_LAYERS::getCTLs( int aLayerNumber )
{
#define RETURN_COPPER( x ) return PANEL_SETUP_LAYERS_CTLs( x##Name, x##CheckBox, x##Choice )
#define RETURN_AUX( x ) return PANEL_SETUP_LAYERS_CTLs( x##Name, x##CheckBox, x##StaticText )
#define RETURN_MANDATORY( x ) return PANEL_SETUP_LAYERS_CTLs( x##Name, nullptr, x##StaticText )
 
 switch( aLayerNumber )
 {
 case F_CrtYd: RETURN_MANDATORY( m_CrtYdFront );
 case F_Fab: RETURN_AUX( m_FabFront );
 case F_Adhes: RETURN_AUX( m_AdhesFront );
 case F_Paste: RETURN_AUX( m_SoldPFront );
 case F_SilkS: RETURN_AUX( m_SilkSFront );
 case F_Mask: RETURN_AUX( m_MaskFront );
 case F_Cu: RETURN_COPPER( m_Front );
 
 case In1_Cu: RETURN_COPPER( m_In1 );
 case In2_Cu: RETURN_COPPER( m_In2 );
 case In3_Cu: RETURN_COPPER( m_In3 );
 case In4_Cu: RETURN_COPPER( m_In4 );
 case In5_Cu: RETURN_COPPER( m_In5 );
 case In6_Cu: RETURN_COPPER( m_In6 );
 case In7_Cu: RETURN_COPPER( m_In7 );
 case In8_Cu: RETURN_COPPER( m_In8 );
 case In9_Cu: RETURN_COPPER( m_In9 );
 case In10_Cu: RETURN_COPPER( m_In10 );
 case In11_Cu: RETURN_COPPER( m_In11 );
 case In12_Cu: RETURN_COPPER( m_In12 );
 case In13_Cu: RETURN_COPPER( m_In13 );
 case In14_Cu: RETURN_COPPER( m_In14 );
 case In15_Cu: RETURN_COPPER( m_In15 );
 
 case In16_Cu: RETURN_COPPER( m_In16 );
 case In17_Cu: RETURN_COPPER( m_In17 );
 case In18_Cu: RETURN_COPPER( m_In18 );
 case In19_Cu: RETURN_COPPER( m_In19 );
 case In20_Cu: RETURN_COPPER( m_In20 );
 case In21_Cu: RETURN_COPPER( m_In21 );
 case In22_Cu: RETURN_COPPER( m_In22 );
 case In23_Cu: RETURN_COPPER( m_In23 );
 case In24_Cu: RETURN_COPPER( m_In24 );
 case In25_Cu: RETURN_COPPER( m_In25 );
 case In26_Cu: RETURN_COPPER( m_In26 );
 case In27_Cu: RETURN_COPPER( m_In27 );
 case In28_Cu: RETURN_COPPER( m_In28 );
 case In29_Cu: RETURN_COPPER( m_In29 );
 case In30_Cu: RETURN_COPPER( m_In30 );
 
 case B_Cu: RETURN_COPPER( m_Back );
 case B_Mask: RETURN_AUX( m_MaskBack );
 case B_SilkS: RETURN_AUX( m_SilkSBack );
 case B_Paste: RETURN_AUX( m_SoldPBack );
 case B_Adhes: RETURN_AUX( m_AdhesBack );
 case B_Fab: RETURN_AUX( m_FabBack );
 case B_CrtYd: RETURN_MANDATORY( m_CrtYdBack );
 
 case Edge_Cuts: RETURN_MANDATORY( m_PCBEdges );
 case Margin: RETURN_MANDATORY( m_Margin );
 case Eco2_User: RETURN_AUX( m_Eco2 );
 case Eco1_User: RETURN_AUX( m_Eco1 );
 case Cmts_User: RETURN_AUX( m_Comments );
 case Dwgs_User: RETURN_AUX( m_Drawings );
 
 case User_1: RETURN_AUX( m_User1 );
 case User_2: RETURN_AUX( m_User2 );
 case User_3: RETURN_AUX( m_User3 );
 case User_4: RETURN_AUX( m_User4 );
 case User_5: RETURN_AUX( m_User5 );
 case User_6: RETURN_AUX( m_User6 );
 case User_7: RETURN_AUX( m_User7 );
 case User_8: RETURN_AUX( m_User8 );
 case User_9: RETURN_AUX( m_User9 );
 
 default:
 wxASSERT_MSG( 0, wxT( "bad layer id" ) );
 return PANEL_SETUP_LAYERS_CTLs( nullptr, nullptr, nullptr );
 }
}
 
 
wxControl* PANEL_SETUP_LAYERS::getName( int aLayer )
{
 return getCTLs( aLayer ).name;
}
 
 
wxCheckBox* PANEL_SETUP_LAYERS::getCheckBox( int aLayer )
{
 return getCTLs( aLayer ).checkbox;
}
 
 
wxChoice* PANEL_SETUP_LAYERS::getChoice( int aLayer )
{
 return (wxChoice*) getCTLs( aLayer ).choice;
}
 
 
bool PANEL_SETUP_LAYERS::TransferDataToWindow()
{
 m_enabledLayers = m_pcb->GetEnabledLayers();
 
 // Rescue may be enabled, but should not be shown in this dialog
 m_enabledLayers.reset( Rescue );
 
 setCopperLayerCheckBoxes( m_pcb->GetCopperLayerCount() );
 
 showBoardLayerNames();
 showSelectedLayerCheckBoxes( m_enabledLayers );
 
 showLayerTypes();
 setMandatoryLayerCheckBoxes();
 setUserDefinedLayerCheckBoxes();
 
 m_initialized = true;
 
 return true;
}
 
 
void PANEL_SETUP_LAYERS::SyncCopperLayers( int aNumCopperLayers )
{
 setCopperLayerCheckBoxes( aNumCopperLayers );
}
 
 
void PANEL_SETUP_LAYERS::setMandatoryLayerCheckBoxes()
{
 for( int layer : { F_CrtYd, B_CrtYd, Edge_Cuts, Margin } )
 setLayerCheckBox( layer, true );
}
 
 
void PANEL_SETUP_LAYERS::setUserDefinedLayerCheckBoxes()
{
 for( LSEQ seq = LSET::UserDefinedLayers().Seq(); seq; ++seq )
 {
 PCB_LAYER_ID layer = *seq;
 bool state = m_pcb->IsLayerEnabled( layer );
 
#ifdef HIDE_INACTIVE_LAYERS
 // This code hides inactive copper layers, or redisplays hidden layers which are now needed.
 PANEL_SETUP_LAYERS_CTLs ctl = getCTLs( layer );
 
 // All user-defined layers should have a checkbox
 wxASSERT( ctl.checkbox );
 
 ctl.name->Show( state );
 ctl.checkbox->Show( state );
 ctl.choice->Show( state );
#endif
 
 setLayerCheckBox( layer, state );
 }
 
#ifdef HIDE_INACTIVE_LAYERS
 // Send an size event to force sizers to be updated,
 // because the number of copper layers can have changed.
 wxSizeEvent evt_size( m_LayersListPanel->GetSize() );
 m_LayersListPanel->GetEventHandler()->ProcessEvent( evt_size );
#endif
}
 
 
void PANEL_SETUP_LAYERS::showBoardLayerNames()
{
 // Set all the board's layer names into the dialog by calling BOARD::GetLayerName(),
 // which will call BOARD::GetStandardLayerName() for non-coppers.
 
 for( LSEQ seq = dlg_layers(); seq; ++seq )
 {
 PCB_LAYER_ID layer = *seq;
 wxControl* ctl = getName( layer );
 
 if( ctl )
 {
 wxString lname = m_pcb->GetLayerName( layer );
 
 if( auto textCtl = dynamic_cast<wxTextCtrl*>( ctl ) )
 textCtl->ChangeValue( lname ); // wxTextCtrl
 else
 ctl->SetLabel( lname ); // wxStaticText
 }
 }
}
 
 
void PANEL_SETUP_LAYERS::showSelectedLayerCheckBoxes( LSET enabledLayers )
{
 // The check boxes
 for( LSEQ seq = dlg_layers(); seq; ++seq )
 {
 PCB_LAYER_ID layer = *seq;
 setLayerCheckBox( layer, enabledLayers[layer] );
 }
}
 
 
void PANEL_SETUP_LAYERS::showLayerTypes()
{
 for( LSEQ seq = LSET::AllCuMask().Seq(); seq; ++seq )
 {
 PCB_LAYER_ID cu_layer = *seq;
 
 wxChoice* ctl = getChoice( cu_layer );
 ctl->SetSelection( m_pcb->GetLayerType( cu_layer ) );
 }
}
 
 
LSET PANEL_SETUP_LAYERS::GetUILayerMask()
{
 LSET layerMaskResult;
 
 for( LSEQ seq = dlg_layers(); seq; ++seq )
 {
 PCB_LAYER_ID layer = *seq;
 wxCheckBox* ctl = getCheckBox( layer );
 
 if( !ctl || ctl->GetValue() )
 layerMaskResult.set( layer );
 }
 
 return layerMaskResult;
}
 
 
void PANEL_SETUP_LAYERS::setLayerCheckBox( int aLayer, bool isChecked )
{
 PANEL_SETUP_LAYERS_CTLs ctl = getCTLs( aLayer );
 
 if( !ctl.checkbox )
 return;
 
 ctl.checkbox->SetValue( isChecked );
}
 
 
void PANEL_SETUP_LAYERS::setCopperLayerCheckBoxes( int copperCount )
{
 if( copperCount > 0 )
 {
 setLayerCheckBox( F_Cu, true );
 --copperCount;
 }
 
 if( copperCount > 0 )
 {
 setLayerCheckBox( B_Cu, true );
 --copperCount;
 }
 
 for( LSEQ seq = LSET::InternalCuMask().Seq(); seq; ++seq, --copperCount )
 {
 PCB_LAYER_ID layer = *seq;
 bool state = copperCount > 0;
 
#ifdef HIDE_INACTIVE_LAYERS
 // This code hides inactive copper layers, or redisplays hidden layers which are now needed.
 PANEL_SETUP_LAYERS_CTLs ctl = getCTLs( layer );
 
 // Inner layers should have a checkbox
 wxASSERT( ctl.checkbox );
 
 ctl.name->Show( state );
 ctl.checkbox->Show( state );
 ctl.choice->Show( state );
#endif
 
 setLayerCheckBox( layer, state );
 }
 
#ifdef HIDE_INACTIVE_LAYERS
 // Send an size event to force sizers to be updated,
 // because the number of copper layers can have changed.
 wxSizeEvent evt_size( m_LayersListPanel->GetSize() );
 m_LayersListPanel->GetEventHandler()->ProcessEvent( evt_size );
#endif
}
 
 
void PANEL_SETUP_LAYERS::OnCheckBox( wxCommandEvent& event )
{
 m_enabledLayers = GetUILayerMask();
}
 
 
void PANEL_SETUP_LAYERS::DenyChangeCheckBox( wxCommandEvent& event )
{
 wxObject* source = event.GetEventObject();
 
 for( LSEQ seq = LSET::AllCuMask().Seq(); seq; ++seq )
 {
 wxCheckBox* copper = getCheckBox( *seq );
 
 if( source == copper )
 {
 DisplayError( wxGetTopLevelParent( this ),
 _( "Use the Physical Stackup page to change the number of "
 "copper layers." ) );
 
 copper->SetValue( true );
 return;
 }
 }
}
 
 
bool PANEL_SETUP_LAYERS::TransferDataFromWindow()
{
 if( !testLayerNames() )
 return false;
 
 // Make sure we have the latest copper layer count
 if( m_physicalStackup )
 SyncCopperLayers( m_physicalStackup->GetCopperLayerCount() );
 
 wxString msg;
 bool modified = false;
 
 // Check for removed layers with items which will get deleted from the board.
 LSEQ removedLayers = getRemovedLayersWithItems();
 
 // Check for non-copper layers in use in footprints, and therefore not removable.
 LSEQ notremovableLayers = getNonRemovableLayers();
 
 if( !notremovableLayers.empty() )
 {
 for( unsigned int ii = 0; ii < notremovableLayers.size(); ii++ )
 msg << m_pcb->GetLayerName( notremovableLayers[ii] ) << wxT( "\n" );
 
 if( !IsOK( wxGetTopLevelParent( this ),
 wxString::Format( _( "Footprints have some items on removed layers:\n"
 "%s\n"
 "These items will be no longer accessible\n"
 "Do you wish to continue?" ), msg ) ) )
 {
 return false;
 }
 }
 
 if( !removedLayers.empty()
 && !IsOK( wxGetTopLevelParent( this ),
 _( "Items have been found on removed layers. This operation will "
 "delete all items from removed layers and cannot be undone.\n"
 "Do you wish to continue?" ) ) )
 {
 return false;
 }
 
 // Delete all objects on layers that have been removed. Leaving them in copper layers
 // can (will?) result in DRC errors and it pollutes the board file with cruft.
 bool hasRemovedBoardItems = false;
 
 if( !removedLayers.empty() )
 {
 m_frame->GetToolManager()->RunAction( PCB_ACTIONS::selectionClear );
 
 PCB_LAYER_COLLECTOR collector;
 
 for( PCB_LAYER_ID layer_id : removedLayers )
 {
 collector.SetLayerId( layer_id );
 collector.Collect( m_pcb, GENERAL_COLLECTOR::BoardLevelItems );
 
 // Bye-bye items on removed layer.
 for( int i = 0; i < collector.GetCount(); i++ )
 {
 BOARD_ITEM* item = collector[i];
 
 // Do not remove/change an item owned by a footprint
 if( dynamic_cast<FOOTPRINT*>( item->GetParentFootprint() ) )
 continue;
 
 // Do not remove footprints
 if( dynamic_cast<FOOTPRINT*>( item ) )
 continue;
 
 LSET layers = item->GetLayerSet();
 
 layers.reset( layer_id );
 hasRemovedBoardItems = true;
 modified = true;
 
 if( layers.any() )
 {
 item->SetLayerSet( layers );
 }
 else
 {
 m_pcb->Remove( item );
 delete item;
 }
 }
 }
 }
 
 m_enabledLayers = GetUILayerMask();
 
 LSET previousEnabled = m_pcb->GetEnabledLayers();
 
 if( m_enabledLayers != previousEnabled )
 {
 m_pcb->SetEnabledLayers( m_enabledLayers );
 
 LSET changedLayers = m_enabledLayers ^ previousEnabled;
 
 /*
 * Ensure enabled layers are also visible. This is mainly to avoid mistakes if some
 * enabled layers are not visible when exiting this dialog.
 */
 m_pcb->SetVisibleLayers( m_pcb->GetVisibleLayers() | changedLayers );
 
 /*
 * Ensure items with through holes have all inner copper layers. (For historical reasons
 * this is NOT trimmed to the currently-enabled inner layers.)
 */
 for( FOOTPRINT* fp : m_pcb->Footprints() )
 {
 for( PAD* pad : fp->Pads() )
 {
 if( pad->HasHole() && pad->IsOnCopperLayer() )
 pad->SetLayerSet( pad->GetLayerSet() | LSET::InternalCuMask() );
 }
 }
 
 // Tracks do not change their layer
 // Vias layers are defined by the starting layer and the ending layer, so
 // they are not modified by adding a layer.
 // So do nothing for tracks/vias
 
 modified = true;
 }
 
 for( LSEQ seq = LSET::AllLayersMask().Seq(); seq; ++seq )
 {
 PCB_LAYER_ID layer = *seq;
 
 if( m_enabledLayers[layer] )
 {
 const wxString& newLayerName = GetLayerName( layer );
 
 if( m_pcb->GetLayerName( layer ) != newLayerName )
 {
 m_pcb->SetLayerName( layer, newLayerName );
 modified = true;
 }
 
 // Only copper layers have a definable type.
 if( LSET::AllCuMask().Contains( layer ) )
 {
 LAYER_T t = (LAYER_T) getLayerTypeIndex( layer );
 
 if( m_pcb->GetLayerType( layer ) != t )
 {
 m_pcb->SetLayerType( layer, t );
 modified = true;
 }
 }
 }
 }
 
 for( LSEQ seq = LSET::UserDefinedLayers().Seq(); seq; ++seq )
 {
 PCB_LAYER_ID layer = *seq;
 const wxString& newLayerName = GetLayerName( layer );
 
 if( m_enabledLayers[ layer ] && m_pcb->GetLayerName( layer ) != newLayerName )
 {
 m_pcb->SetLayerName( layer, newLayerName );
 modified = true;
 }
 }
 
 // If some board items are deleted: Rebuild the connectivity, because it is likely some
 // tracks and vias were removed
 if( hasRemovedBoardItems )
 m_pcb->BuildConnectivity();
 
 if( modified )
 m_frame->OnModify();
 
 return true;
}
 
 
int PANEL_SETUP_LAYERS::getLayerTypeIndex( int aLayer )
{
 wxChoice* ctl = getChoice( aLayer );
 int ret = ctl->GetCurrentSelection(); // Indices must have same sequence as LAYER_T
 return ret;
}
 
 
wxString PANEL_SETUP_LAYERS::GetLayerName( int aLayer )
{
 wxControl* control = getName( aLayer );
 
 if( auto textCtl = dynamic_cast<wxTextCtrl*>( control ) )
 return textCtl->GetValue().Trim();
 else
 return control->GetLabel();
}
 
 
static bool hasOneOf( const wxString& str, const wxString& chars )
{
 for( unsigned i=0; i<chars.Len(); ++i )
 {
 if( str.Find( chars[i] ) != wxNOT_FOUND )
 return true;
 }
 
 return false;
}
 
 
bool PANEL_SETUP_LAYERS::testLayerNames()
{
 std::vector<wxString> names;
 wxTextCtrl* ctl;
 
 for( LSEQ seq = LSET::AllLayersMask().Seq(); seq; ++seq )
 {
 PCB_LAYER_ID layer = *seq;
 
 // we _can_ rely on m_enabledLayers being current here:
 
 if( !m_enabledLayers[layer] )
 continue;
 
 wxString name = GetLayerName( layer );
 
 ctl = (wxTextCtrl*) getName( layer );
 
 // Check name for legality:
 // 1) Cannot be blank.
 // 2) Cannot have blanks.
 // 3) Cannot have " chars
 // 4) Cannot be 'signal'
 // 5) Must be unique.
 // 6) Cannot have illegal chars in filenames ( some filenames are built from layer names )
 // like : % $ \ " / :
 wxString badchars = wxFileName::GetForbiddenChars( wxPATH_DOS );
 badchars.Append( '%' );
 
 if( !name )
 {
 PAGED_DIALOG::GetDialog( this )->SetError( _( "Layer must have a name." ), this, ctl );
 return false;
 }
 
 if( hasOneOf( name, badchars ) )
 {
 wxString msg = wxString::Format(_( "%s are forbidden in layer names." ), badchars );
 PAGED_DIALOG::GetDialog( this )->SetError( msg, this, ctl );
 return false;
 }
 
 if( name == wxT( "signal" ) )
 {
 PAGED_DIALOG::GetDialog( this )->SetError( _( "Layer name \"signal\" is reserved." ),
 this, ctl );
 return false;
 }
 
 for( const wxString& existingName : names )
 {
 if( name == existingName )
 {
 wxString msg = wxString::Format(_( "Layer name '%s' already in use." ), name );
 PAGED_DIALOG::GetDialog( this )->SetError( msg, this, ctl );
 return false;
 }
 }
 
 names.push_back( name );
 }
 
 return true;
}
 
 
LSEQ PANEL_SETUP_LAYERS::getRemovedLayersWithItems()
{
 LSEQ removedLayers;
 LSET newLayers = GetUILayerMask();
 LSET curLayers = m_pcb->GetEnabledLayers();
 
 if( newLayers == curLayers ) // Return an empty list if no change
 return removedLayers;
 
 PCB_LAYER_COLLECTOR collector;
 LSEQ newLayerSeq = newLayers.Seq();
 
 for( PCB_LAYER_ID layer_id : curLayers.Seq() )
 {
 if( !alg::contains( newLayerSeq, layer_id ) )
 {
 collector.SetLayerId( layer_id );
 collector.Collect( m_pcb, GENERAL_COLLECTOR::BoardLevelItems );
 
 if( collector.GetCount() != 0 )
 {
 // Skip items owned by footprints and footprints when building
 // the actual list of removed layers: these items are not removed
 for( int i = 0; i < collector.GetCount(); i++ )
 {
 BOARD_ITEM* item = collector[i];
 
 if( dynamic_cast<FOOTPRINT*>( item )
 || dynamic_cast<FOOTPRINT*>( item->GetParentFootprint() ) )
 continue;
 
 removedLayers.push_back( layer_id );
 break;
 }
 }
 }
 }
 
 return removedLayers;
}
 
 
LSEQ PANEL_SETUP_LAYERS::getNonRemovableLayers()
{
 // Build the list of non-copper layers in use in footprints.
 LSEQ inUseLayers;
 LSET newLayers = GetUILayerMask();
 LSET curLayers = m_pcb->GetEnabledLayers();
 
 if( newLayers == curLayers ) // Return an empty list if no change
 return inUseLayers;
 
 PCB_LAYER_COLLECTOR collector;
 LSEQ newLayerSeq = newLayers.Seq();
 
 for( PCB_LAYER_ID layer_id : curLayers.Seq() )
 {
 if( IsCopperLayer( layer_id ) ) // Copper layers are not taken into account here
 continue;
 
 if( !alg::contains( newLayerSeq, layer_id ) )
 {
 collector.SetLayerId( layer_id );
 collector.Collect( m_pcb, GENERAL_COLLECTOR::FootprintItems );
 
 if( collector.GetCount() != 0 )
 inUseLayers.push_back( layer_id );
 }
 }
 
 return inUseLayers;
}
 
 
void PANEL_SETUP_LAYERS::ImportSettingsFrom( BOARD* aBoard )
{
 BOARD* savedBoard = m_pcb;
 
 m_pcb = aBoard;
 TransferDataToWindow();
 
 m_pcb = savedBoard;
}
 
 
bool PANEL_SETUP_LAYERS::CheckCopperLayerCount( BOARD* aWorkingBoard, BOARD* aImportedBoard )
{
 /*
 * This function warns users if they are going to delete inner copper layers because
 * they're importing settings from a board with less copper layers than the board
 * already loaded. We want to return "true" as default on the assumption no layer will
 * actually be deleted.
 */
 bool okToDeleteCopperLayers = true;
 
 // Get the number of copper layers in the loaded board and the "import settings" board
 int currNumLayers = aWorkingBoard->GetCopperLayerCount();
 int newNumLayers = aImportedBoard->GetCopperLayerCount();
 
 if( newNumLayers < currNumLayers )
 {
 wxString msg = wxString::Format( _( "Imported settings have fewer copper layers than "
 "the current board (%i instead of %i).\n\n"
 "Continue and delete the extra inner copper layers "
 "from the current board?" ),
 newNumLayers,
 currNumLayers );
 
 wxWindow* topLevelParent = wxGetTopLevelParent( this );
 
 wxMessageDialog dlg( topLevelParent, msg, _( "Inner Layers To Be Deleted" ),
 wxICON_WARNING | wxSTAY_ON_TOP | wxYES | wxNO | wxNO_DEFAULT );
 
 if( wxID_NO == dlg.ShowModal() )
 okToDeleteCopperLayers = false;
 }
 
 return okToDeleteCopperLayers;
}
 
 
void PANEL_SETUP_LAYERS::addUserDefinedLayer( wxCommandEvent& aEvent )
{
 wxArrayString headers;
 headers.Add( _( "Layers" ) );
 
 // Build the available user-defined layers list:
 std::vector<wxArrayString> list;
 
 for( LSEQ seq = LSET::UserDefinedLayers().Seq(); seq; ++seq )
 {
 wxCheckBox* checkBox = getCheckBox( *seq );
 
 if( checkBox && checkBox->IsShown() )
 continue;
 
 wxArrayString available_user_layer;
 available_user_layer.Add( LayerName( *seq ) );
 
 list.emplace_back( available_user_layer );
 }
 
 if( list.empty() )
 {
 DisplayErrorMessage( PAGED_DIALOG::GetDialog( this ),
 _( "All user-defined layers have already been added." ) );
 return;
 }
 
 EDA_LIST_DIALOG dlg( PAGED_DIALOG::GetDialog( this ), _( "Add User-defined Layer" ),
 headers, list );
 dlg.SetListLabel( _( "Select layer to add:" ) );
 dlg.HideFilter();
 
 if( dlg.ShowModal() == wxID_CANCEL || dlg.GetTextSelection().IsEmpty() )
 return;
 
 LSEQ seq;
 
 for( seq = LSET::UserDefinedLayers().Seq(); seq; ++seq )
 {
 if( LayerName( *seq ) == dlg.GetTextSelection() )
 break;
 }
 
 wxCHECK( *seq >= User_1 && *seq <= User_9, /* void */ );
 
 LSET newLayer( *seq );
 
 m_enabledLayers |= newLayer;
 
 PANEL_SETUP_LAYERS_CTLs ctl = getCTLs( *seq );
 
 // All user-defined layers should have a checkbox
 wxASSERT( ctl.checkbox );
 
 wxTextCtrl* textCtrl = dynamic_cast<wxTextCtrl*>( ctl.name );
 
 wxCHECK( textCtrl, /* void */ );
 textCtrl->ChangeValue( LSET::Name( *seq ) );
 ctl.name->Show( true );
 ctl.checkbox->Show( true );
 ctl.choice->Show( true );
 
 wxSizeEvent evt_size( m_LayersListPanel->GetSize() );
 m_LayersListPanel->GetEventHandler()->ProcessEvent( evt_size );
 
 setLayerCheckBox( *seq, true );
}