dialog_symbol_properties.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2004-2022 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 "dialog_symbol_properties.h"
 
#include <memory>
 
#include <bitmaps.h>
#include <wx/tooltip.h>
#include <grid_tricks.h>
#include <confirm.h>
#include <kiface_base.h>
#include <pin_numbers.h>
#include <string_utils.h>
#include <menus_helpers.h>
#include <kiplatform/ui.h>
#include <widgets/grid_icon_text_helpers.h>
#include <widgets/grid_combobox.h>
#include <widgets/std_bitmap_button.h>
#include <settings/settings_manager.h>
#include <ee_collectors.h>
#include <symbol_library.h>
#include <fields_grid_table.h>
#include <sch_edit_frame.h>
#include <sch_reference_list.h>
#include <schematic.h>
#include <tool/tool_manager.h>
#include <tool/actions.h>
#include <math/vector2d.h>
 
#ifdef KICAD_SPICE
#include <dialog_sim_model.h>
#endif /* KICAD_SPICE */
 
 
wxDEFINE_EVENT( SYMBOL_DELAY_FOCUS, wxCommandEvent );
wxDEFINE_EVENT( SYMBOL_DELAY_SELECTION, wxCommandEvent );
 
enum PIN_TABLE_COL_ORDER
{
 COL_NUMBER,
 COL_BASE_NAME,
 COL_ALT_NAME,
 COL_TYPE,
 COL_SHAPE,
 
 COL_COUNT // keep as last
};
 
 
class SCH_PIN_TABLE_DATA_MODEL : public wxGridTableBase, public std::vector<SCH_PIN>
{
protected:
 std::vector<wxGridCellAttr*> m_nameAttrs;
 wxGridCellAttr* m_readOnlyAttr;
 wxGridCellAttr* m_typeAttr;
 wxGridCellAttr* m_shapeAttr;
 
public:
 SCH_PIN_TABLE_DATA_MODEL() :
 m_readOnlyAttr( nullptr ),
 m_typeAttr( nullptr ),
 m_shapeAttr( nullptr )
 {
 }
 
 ~SCH_PIN_TABLE_DATA_MODEL()
 {
 for( wxGridCellAttr* attr : m_nameAttrs )
 attr->DecRef();
 
 m_readOnlyAttr->DecRef();
 m_typeAttr->DecRef();
 m_shapeAttr->DecRef();
 }
 
 void BuildAttrs()
 {
 for( wxGridCellAttr* attr : m_nameAttrs )
 attr->DecRef();
 
 m_nameAttrs.clear();
 
 if( m_readOnlyAttr )
 m_readOnlyAttr->DecRef();
 
 m_readOnlyAttr = new wxGridCellAttr;
 m_readOnlyAttr->SetReadOnly( true );
 
 for( const SCH_PIN& pin : *this )
 {
 LIB_PIN* lib_pin = pin.GetLibPin();
 wxGridCellAttr* attr = nullptr;
 
 if( lib_pin->GetAlternates().empty() )
 {
 attr = new wxGridCellAttr;
 attr->SetReadOnly( true );
 }
 else
 {
 wxArrayString choices;
 choices.push_back( lib_pin->GetName() );
 
 for( const std::pair<const wxString, LIB_PIN::ALT>& alt : lib_pin->GetAlternates() )
 choices.push_back( alt.first );
 
 attr = new wxGridCellAttr();
 attr->SetEditor( new GRID_CELL_COMBOBOX( choices ) );
 }
 
 m_nameAttrs.push_back( attr );
 }
 
 if( m_typeAttr )
 m_typeAttr->DecRef();
 
 m_typeAttr = new wxGridCellAttr;
 m_typeAttr->SetRenderer( new GRID_CELL_ICON_TEXT_RENDERER( PinTypeIcons(),
 PinTypeNames() ) );
 m_typeAttr->SetReadOnly( true );
 
 if( m_shapeAttr )
 m_shapeAttr->DecRef();
 
 m_shapeAttr = new wxGridCellAttr;
 m_shapeAttr->SetRenderer( new GRID_CELL_ICON_TEXT_RENDERER( PinShapeIcons(),
 PinShapeNames() ) );
 m_shapeAttr->SetReadOnly( true );
 }
 
 int GetNumberRows() override { return (int) size(); }
 int GetNumberCols() override { return COL_COUNT; }
 
 wxString GetColLabelValue( int aCol ) override
 {
 switch( aCol )
 {
 case COL_NUMBER: return _( "Number" );
 case COL_BASE_NAME: return _( "Base Name" );
 case COL_ALT_NAME: return _( "Alternate Assignment" );
 case COL_TYPE: return _( "Electrical Type" );
 case COL_SHAPE: return _( "Graphic Style" );
 default: wxFAIL; return wxEmptyString;
 }
 }
 
 bool IsEmptyCell( int row, int col ) override
 {
 return false; // don't allow adjacent cell overflow, even if we are actually empty
 }
 
 wxString GetValue( int aRow, int aCol ) override
 {
 return GetValue( at( aRow ), aCol );
 }
 
 static wxString GetValue( const SCH_PIN& aPin, int aCol )
 {
 switch( aCol )
 {
 case COL_NUMBER: return aPin.GetNumber();
 case COL_BASE_NAME: return aPin.GetLibPin()->GetName();
 case COL_ALT_NAME: return aPin.GetAlt();
 case COL_TYPE: return PinTypeNames()[static_cast<int>( aPin.GetType() )];
 case COL_SHAPE: return PinShapeNames()[static_cast<int>( aPin.GetShape() )];
 default: wxFAIL; return wxEmptyString;
 }
 }
 
 wxGridCellAttr* GetAttr( int aRow, int aCol, wxGridCellAttr::wxAttrKind ) override
 {
 switch( aCol )
 {
 case COL_NUMBER:
 case COL_BASE_NAME:
 m_readOnlyAttr->IncRef();
 return m_readOnlyAttr;
 
 case COL_ALT_NAME:
 m_nameAttrs[ aRow ]->IncRef();
 return m_nameAttrs[ aRow ];
 
 case COL_TYPE:
 m_typeAttr->IncRef();
 return m_typeAttr;
 
 case COL_SHAPE:
 m_shapeAttr->IncRef();
 return m_shapeAttr;
 
 default:
 wxFAIL;
 return nullptr;
 }
 }
 
 void SetValue( int aRow, int aCol, const wxString &aValue ) override
 {
 switch( aCol )
 {
 case COL_ALT_NAME:
 if( aValue == at( aRow ).GetLibPin()->GetName() )
 at( aRow ).SetAlt( wxEmptyString );
 else
 at( aRow ).SetAlt( aValue );
 break;
 
 case COL_NUMBER:
 case COL_BASE_NAME:
 case COL_TYPE:
 case COL_SHAPE:
 // Read-only.
 break;
 
 default:
 wxFAIL;
 break;
 }
 }
 
 static bool compare( const SCH_PIN& lhs, const SCH_PIN& rhs, int sortCol, bool ascending )
 {
 wxString lhStr = GetValue( lhs, sortCol );
 wxString rhStr = GetValue( rhs, sortCol );
 
 if( lhStr == rhStr )
 {
 // Secondary sort key is always COL_NUMBER
 sortCol = COL_NUMBER;
 lhStr = GetValue( lhs, sortCol );
 rhStr = GetValue( rhs, sortCol );
 }
 
 bool res;
 
 // N.B. To meet the iterator sort conditions, we cannot simply invert the truth
 // to get the opposite sort. i.e. ~(a<b) != (a>b)
 auto cmp = [ ascending ]( const auto a, const auto b )
 {
 if( ascending )
 return a < b;
 else
 return b < a;
 };
 
 switch( sortCol )
 {
 case COL_NUMBER:
 case COL_BASE_NAME:
 case COL_ALT_NAME:
 res = cmp( PIN_NUMBERS::Compare( lhStr, rhStr ), 0 );
 break;
 case COL_TYPE:
 case COL_SHAPE:
 res = cmp( lhStr.CmpNoCase( rhStr ), 0 );
 break;
 default:
 res = cmp( StrNumCmp( lhStr, rhStr ), 0 );
 break;
 }
 
 return res;
 }
 
 void SortRows( int aSortCol, bool ascending )
 {
 std::sort( begin(), end(),
 [ aSortCol, ascending ]( const SCH_PIN& lhs, const SCH_PIN& rhs ) -> bool
 {
 return compare( lhs, rhs, aSortCol, ascending );
 } );
 }
};
 
 
DIALOG_SYMBOL_PROPERTIES::DIALOG_SYMBOL_PROPERTIES( SCH_EDIT_FRAME* aParent,
 SCH_SYMBOL* aSymbol ) :
 DIALOG_SYMBOL_PROPERTIES_BASE( aParent ),
 m_symbol( nullptr ),
 m_part( nullptr ),
 m_fieldsSize( 0, 0 ),
 m_lastRequestedSize( 0, 0 ),
 m_editorShown( false ),
 m_fields( nullptr ),
 m_dataModel( nullptr )
{
 m_symbol = aSymbol;
 m_part = m_symbol->GetLibSymbolRef().get();
 
 // GetLibSymbolRef() now points to the cached part in the schematic, which should always be
 // there for usual cases, but can be null when opening old schematics not storing the part
 // so we need to handle m_part == nullptr
 // wxASSERT( m_part );
 
 m_fields = new FIELDS_GRID_TABLE<SCH_FIELD>( this, aParent, m_fieldsGrid, m_symbol );
 
#ifndef KICAD_SPICE
 m_cbExcludeFromSim->Hide();
 m_spiceFieldsButton->Hide();
#endif /* not KICAD_SPICE */
 
 // Give a bit more room for combobox editors
 m_fieldsGrid->SetDefaultRowSize( m_fieldsGrid->GetDefaultRowSize() + 4 );
 m_pinGrid->SetDefaultRowSize( m_pinGrid->GetDefaultRowSize() + 4 );
 
 m_fieldsGrid->SetTable( m_fields );
 m_fieldsGrid->PushEventHandler( new FIELDS_GRID_TRICKS( m_fieldsGrid, this,
 [&]( wxCommandEvent& aEvent )
 {
 OnAddField( aEvent );
 } ) );
 m_fieldsGrid->SetSelectionMode( wxGrid::wxGridSelectRows );
 
 // Show/hide columns according to user's preference
 EESCHEMA_SETTINGS* cfg = dynamic_cast<EESCHEMA_SETTINGS*>( Kiface().KifaceSettings() );
 
 if( cfg )
 {
 m_shownColumns = cfg->m_Appearance.edit_symbol_visible_columns;
 m_fieldsGrid->ShowHideColumns( m_shownColumns );
 }
 
 if( m_part && m_part->HasConversion() )
 {
 // DeMorgan conversions are a subclass of alternate pin assignments, so don't allow
 // free-form alternate assignments as well. (We won't know how to map the alternates
 // back and forth when the conversion is changed.)
 m_pinTablePage->Disable();
 m_pinTablePage->SetToolTip( _( "Alternate pin assignments are not available for De Morgan "
 "symbols." ) );
 }
 else
 {
 m_dataModel = new SCH_PIN_TABLE_DATA_MODEL();
 
 // Make a copy of the pins for editing
 for( const std::unique_ptr<SCH_PIN>& pin : m_symbol->GetRawPins() )
 m_dataModel->push_back( *pin );
 
 m_dataModel->SortRows( COL_NUMBER, true );
 m_dataModel->BuildAttrs();
 
 m_pinGrid->SetTable( m_dataModel );
 }
 
 m_pinGrid->PushEventHandler( new GRID_TRICKS( m_pinGrid ) );
 m_pinGrid->SetSelectionMode( wxGrid::wxGridSelectRows );
 
 wxToolTip::Enable( true );
 SetupStandardButtons();
 
 // Configure button logos
 m_bpAdd->SetBitmap( KiBitmap( BITMAPS::small_plus ) );
 m_bpDelete->SetBitmap( KiBitmap( BITMAPS::small_trash ) );
 m_bpMoveUp->SetBitmap( KiBitmap( BITMAPS::small_up ) );
 m_bpMoveDown->SetBitmap( KiBitmap( BITMAPS::small_down ) );
 
 // wxFormBuilder doesn't include this event...
 m_fieldsGrid->Bind( wxEVT_GRID_CELL_CHANGING, &DIALOG_SYMBOL_PROPERTIES::OnGridCellChanging,
 this );
 m_pinGrid->Bind( wxEVT_GRID_COL_SORT, &DIALOG_SYMBOL_PROPERTIES::OnPinTableColSort, this );
 Bind( SYMBOL_DELAY_FOCUS, &DIALOG_SYMBOL_PROPERTIES::HandleDelayedFocus, this );
 Bind( SYMBOL_DELAY_SELECTION, &DIALOG_SYMBOL_PROPERTIES::HandleDelayedSelection, this );
 
 QueueEvent( new wxCommandEvent( SYMBOL_DELAY_SELECTION ) );
 wxCommandEvent *evt = new wxCommandEvent( SYMBOL_DELAY_FOCUS );
 evt->SetClientData( new VECTOR2I( REFERENCE_FIELD, FDC_VALUE ) );
 QueueEvent( evt );
 
 finishDialogSettings();
}
 
 
DIALOG_SYMBOL_PROPERTIES::~DIALOG_SYMBOL_PROPERTIES()
{
 EESCHEMA_SETTINGS* cfg = dynamic_cast<EESCHEMA_SETTINGS*>( Kiface().KifaceSettings() );
 
 if( cfg )
 {
 cfg->m_Appearance.edit_symbol_visible_columns = m_fieldsGrid->GetShownColumns();
 cfg->m_Appearance.edit_symbol_width = GetSize().x;
 cfg->m_Appearance.edit_symbol_height = GetSize().y;
 }
 
 // Prevents crash bug in wxGrid's d'tor
 m_fieldsGrid->DestroyTable( m_fields );
 
 if( m_dataModel )
 m_pinGrid->DestroyTable( m_dataModel );
 
 m_fieldsGrid->Unbind( wxEVT_GRID_CELL_CHANGING, &DIALOG_SYMBOL_PROPERTIES::OnGridCellChanging,
 this );
 m_pinGrid->Unbind( wxEVT_GRID_COL_SORT, &DIALOG_SYMBOL_PROPERTIES::OnPinTableColSort, this );
 Unbind( SYMBOL_DELAY_FOCUS, &DIALOG_SYMBOL_PROPERTIES::HandleDelayedFocus, this );
 Unbind( SYMBOL_DELAY_SELECTION, &DIALOG_SYMBOL_PROPERTIES::HandleDelayedSelection, this );
 
 // Delete the GRID_TRICKS.
 m_fieldsGrid->PopEventHandler( true );
 m_pinGrid->PopEventHandler( true );
}
 
 
SCH_EDIT_FRAME* DIALOG_SYMBOL_PROPERTIES::GetParent()
{
 return dynamic_cast<SCH_EDIT_FRAME*>( wxDialog::GetParent() );
}
 
 
bool DIALOG_SYMBOL_PROPERTIES::TransferDataToWindow()
{
 if( !wxDialog::TransferDataToWindow() )
 return false;
 
 std::set<wxString> defined;
 
 // Push a copy of each field into m_updateFields
 for( int i = 0; i < m_symbol->GetFieldCount(); ++i )
 {
 SCH_FIELD field( m_symbol->GetFields()[i] );
 
 // change offset to be symbol-relative
 field.Offset( -m_symbol->GetPosition() );
 
 defined.insert( field.GetName() );
 m_fields->push_back( field );
 }
 
 // Add in any template fieldnames not yet defined:
 for( const TEMPLATE_FIELDNAME& templateFieldname :
 GetParent()->Schematic().Settings().m_TemplateFieldNames.GetTemplateFieldNames() )
 {
 if( defined.count( templateFieldname.m_Name ) <= 0 )
 {
 SCH_FIELD field( VECTOR2I( 0, 0 ), -1, m_symbol, templateFieldname.m_Name );
 field.SetVisible( templateFieldname.m_Visible );
 m_fields->push_back( field );
 }
 }
 
 // notify the grid
 wxGridTableMessage msg( m_fields, wxGRIDTABLE_NOTIFY_ROWS_APPENDED, m_fields->size() );
 m_fieldsGrid->ProcessTableMessage( msg );
 AdjustFieldsGridColumns();
 
 // If a multi-unit symbol, set up the unit selector and interchangeable checkbox.
 if( m_symbol->GetUnitCount() > 1 )
 {
 // Ensure symbol unit is the currently selected unit (mandatory in complex hierarchies)
 // from the current sheet path, because it can be modified by previous calculations
 m_symbol->UpdateUnit( m_symbol->GetUnitSelection( &GetParent()->GetCurrentSheet() ) );
 
 for( int ii = 1; ii <= m_symbol->GetUnitCount(); ii++ )
 {
 if( m_symbol->HasUnitDisplayName( ii ) )
 m_unitChoice->Append( m_symbol->GetUnitDisplayName( ii ) );
 else
 m_unitChoice->Append( LIB_SYMBOL::SubReference( ii, false ) );
 }
 
 if( m_symbol->GetUnit() <= ( int )m_unitChoice->GetCount() )
 m_unitChoice->SetSelection( m_symbol->GetUnit() - 1 );
 }
 else
 {
 m_unitLabel->Enable( false );
 m_unitChoice->Enable( false );
 }
 
 if( m_part && m_part->HasConversion() )
 {
 if( m_symbol->GetConvert() > LIB_ITEM::LIB_CONVERT::BASE )
 m_cbAlternateSymbol->SetValue( true );
 }
 else
 {
 m_cbAlternateSymbol->Enable( false );
 }
 
 // Set the symbol orientation and mirroring.
 int orientation = m_symbol->GetOrientation() & ~( SYM_MIRROR_X | SYM_MIRROR_Y );
 
 switch( orientation )
 {
 default:
 case SYM_ORIENT_0: m_orientationCtrl->SetSelection( 0 ); break;
 case SYM_ORIENT_90: m_orientationCtrl->SetSelection( 1 ); break;
 case SYM_ORIENT_270: m_orientationCtrl->SetSelection( 2 ); break;
 case SYM_ORIENT_180: m_orientationCtrl->SetSelection( 3 ); break;
 }
 
 int mirror = m_symbol->GetOrientation() & ( SYM_MIRROR_X | SYM_MIRROR_Y );
 
 switch( mirror )
 {
 default: m_mirrorCtrl->SetSelection( 0 ) ; break;
 case SYM_MIRROR_X: m_mirrorCtrl->SetSelection( 1 ); break;
 case SYM_MIRROR_Y: m_mirrorCtrl->SetSelection( 2 ); break;
 }
 
#ifdef KICAD_SPICE
 m_cbExcludeFromSim->SetValue( m_symbol->GetFieldText( SIM_ENABLE_FIELD ) == wxS( "0" ) );
#endif
 m_cbExcludeFromBom->SetValue( !m_symbol->GetIncludeInBom() );
 m_cbExcludeFromBoard->SetValue( !m_symbol->GetIncludeOnBoard() );
 m_cbDNP->SetValue( m_symbol->GetDNP() );
 
 if( m_part )
 {
 m_ShowPinNumButt->SetValue( m_part->ShowPinNumbers() );
 m_ShowPinNameButt->SetValue( m_part->ShowPinNames() );
 }
 
 // Set the symbol's library name.
 m_tcLibraryID->SetValue( UnescapeString( m_symbol->GetLibId().Format() ) );
 
 Layout();
 m_fieldsGrid->Layout();
 wxSafeYield();
 
 return true;
}
 
 
void DIALOG_SYMBOL_PROPERTIES::OnExcludeFromSimulation( wxCommandEvent& event )
{
#ifdef KICAD_SPICE
 int simEnableFieldRow = -1;
 
 for( int ii = MANDATORY_FIELDS; ii < m_fieldsGrid->GetNumberRows(); ++ii )
 {
 if( m_fieldsGrid->GetCellValue( ii, FDC_NAME ) == SIM_ENABLE_FIELD )
 simEnableFieldRow = ii;
 }
 
 if( event.IsChecked() )
 {
 if( simEnableFieldRow == -1 )
 {
 simEnableFieldRow = (int) m_fields->size();
 m_fields->emplace_back( VECTOR2I( 0, 0 ), simEnableFieldRow, m_symbol, SIM_ENABLE_FIELD );
 
 // notify the grid
 wxGridTableMessage msg( m_fields, wxGRIDTABLE_NOTIFY_ROWS_APPENDED, 1 );
 m_fieldsGrid->ProcessTableMessage( msg );
 }
 
 m_fieldsGrid->SetCellValue( simEnableFieldRow, FDC_VALUE, wxT( "0" ) );
 m_fieldsGrid->SetCellValue( simEnableFieldRow, FDC_SHOWN, wxT( "0" ) );
 m_fieldsGrid->SetCellValue( simEnableFieldRow, FDC_SHOW_NAME, wxT( "0" ) );
 }
 else if( simEnableFieldRow >= 0 )
 {
 m_fields->erase( m_fields->begin() + simEnableFieldRow );
 
 // notify the grid
 wxGridTableMessage msg( m_fields, wxGRIDTABLE_NOTIFY_ROWS_DELETED, simEnableFieldRow, 1 );
 m_fieldsGrid->ProcessTableMessage( msg );
 }
 
 OnModify();
#endif
}
 
 
void DIALOG_SYMBOL_PROPERTIES::OnEditSpiceModel( wxCommandEvent& event )
{
#ifdef KICAD_SPICE
 if( !m_fieldsGrid->CommitPendingChanges() )
 return;
 
 std::vector<SCH_FIELD> fields;
 
 for( const SCH_FIELD& field : *m_fields )
 fields.emplace_back( field );
 
 DIALOG_SIM_MODEL dialog( this, *m_symbol, fields );
 
 if( dialog.ShowModal() != wxID_OK )
 return;
 
 // Add in any new fields
 for( const SCH_FIELD& editedField : fields )
 {
 bool found = false;
 
 for( SCH_FIELD& existingField : *m_fields )
 {
 if( existingField.GetName() == editedField.GetName() )
 {
 found = true;
 existingField.SetText( editedField.GetText() );
 break;
 }
 }
 
 if( !found )
 {
 m_fields->emplace_back( editedField );
 wxGridTableMessage msg( m_fields, wxGRIDTABLE_NOTIFY_ROWS_APPENDED, 1 );
 m_fieldsGrid->ProcessTableMessage( msg );
 }
 }
 
 // Remove any deleted fields
 for( int ii = (int) m_fields->size() - 1; ii >= 0; --ii )
 {
 SCH_FIELD& existingField = m_fields->at( ii );
 bool found = false;
 
 for( SCH_FIELD& editedField : fields )
 {
 if( editedField.GetName() == existingField.GetName() )
 {
 found = true;
 break;
 }
 }
 
 if( !found )
 {
 m_fields->erase( m_fields->begin() + ii );
 wxGridTableMessage msg( m_fields, wxGRIDTABLE_NOTIFY_ROWS_DELETED, ii, 1 );
 m_fieldsGrid->ClearSelection();
 m_fieldsGrid->ProcessTableMessage( msg );
 }
 }
 
 OnModify();
 m_fieldsGrid->ForceRefresh();
#endif /* KICAD_SPICE */
}
 
 
void DIALOG_SYMBOL_PROPERTIES::OnCancelButtonClick( wxCommandEvent& event )
{
 // Running the Footprint Browser gums up the works and causes the automatic cancel
 // stuff to no longer work. So we do it here ourselves.
 EndQuasiModal( wxID_CANCEL );
}
 
 
bool DIALOG_SYMBOL_PROPERTIES::Validate()
{
 LIB_ID id;
 
 if( !m_fieldsGrid->CommitPendingChanges() || !m_fieldsGrid->Validate() )
 return false;
 
 if( !SCH_SYMBOL::IsReferenceStringValid( m_fields->at( REFERENCE_FIELD ).GetText() ) )
 {
 DisplayErrorMessage( this, _( "References must start with a letter." ) );
 
 wxCommandEvent *evt = new wxCommandEvent( SYMBOL_DELAY_FOCUS );
 evt->SetClientData( new VECTOR2I( REFERENCE_FIELD, FDC_VALUE ) );
 QueueEvent( evt );
 
 return false;
 }
 
 // Check for missing field names.
 for( size_t i = MANDATORY_FIELDS; i < m_fields->size(); ++i )
 {
 SCH_FIELD& field = m_fields->at( i );
 wxString fieldName = field.GetName( false );
 
 if( fieldName.IsEmpty() )
 {
 DisplayErrorMessage( this, _( "Fields must have a name." ) );
 
 wxCommandEvent *evt = new wxCommandEvent( SYMBOL_DELAY_FOCUS );
 evt->SetClientData( new VECTOR2I( i, FDC_VALUE ) );
 QueueEvent( evt );
 
 return false;
 }
 }
 
 return true;
}
 
 
bool DIALOG_SYMBOL_PROPERTIES::TransferDataFromWindow()
{
 if( !wxDialog::TransferDataFromWindow() ) // Calls our Validate() method.
 return false;
 
 if( !m_fieldsGrid->CommitPendingChanges() )
 return false;
 
 if( !m_pinGrid->CommitPendingChanges() )
 return false;
 
 SCH_SCREEN* currentScreen = GetParent()->GetScreen();
 wxCHECK( currentScreen, false );
 
 // This needs to be done before the LIB_ID is changed to prevent stale library symbols in
 // the schematic file.
 currentScreen->Remove( m_symbol );
 
 // save old cmp in undo list if not already in edit, or moving ...
 if( m_symbol->GetEditFlags() == 0 )
 GetParent()->SaveCopyInUndoList( currentScreen, m_symbol, UNDO_REDO::CHANGED, false );
 
 // Save current flags which could be modified by next change settings
 EDA_ITEM_FLAGS flags = m_symbol->GetFlags();
 
 // For symbols with multiple shapes (De Morgan representation) Set the selected shape:
 if( m_cbAlternateSymbol->IsEnabled() && m_cbAlternateSymbol->GetValue() )
 m_symbol->SetConvert( LIB_ITEM::LIB_CONVERT::DEMORGAN );
 else
 m_symbol->SetConvert( LIB_ITEM::LIB_CONVERT::BASE );
 
 //Set the part selection in multiple part per package
 int unit_selection = m_unitChoice->IsEnabled() ? m_unitChoice->GetSelection() + 1 : 1;
 m_symbol->SetUnitSelection( &GetParent()->GetCurrentSheet(), unit_selection );
 m_symbol->SetUnit( unit_selection );
 
 switch( m_orientationCtrl->GetSelection() )
 {
 case 0: m_symbol->SetOrientation( SYM_ORIENT_0 ); break;
 case 1: m_symbol->SetOrientation( SYM_ORIENT_90 ); break;
 case 2: m_symbol->SetOrientation( SYM_ORIENT_270 ); break;
 case 3: m_symbol->SetOrientation( SYM_ORIENT_180 ); break;
 }
 
 switch( m_mirrorCtrl->GetSelection() )
 {
 case 0: break;
 case 1: m_symbol->SetOrientation( SYM_MIRROR_X ); break;
 case 2: m_symbol->SetOrientation( SYM_MIRROR_Y ); break;
 }
 
 if( m_part )
 {
 m_part->SetShowPinNames( m_ShowPinNameButt->GetValue() );
 m_part->SetShowPinNumbers( m_ShowPinNumButt->GetValue() );
 }
 
 // Restore m_Flag modified by SetUnit() and other change settings from the dialog
 m_symbol->ClearFlags();
 m_symbol->SetFlags( flags );
 
 // change all field positions from relative to absolute
 for( unsigned i = 0; i < m_fields->size(); ++i )
 m_fields->at( i ).Offset( m_symbol->GetPosition() );
 
 SCH_FIELDS& fields = m_symbol->GetFields();
 
 fields.clear();
 
 for( size_t i = 0; i < m_fields->size(); ++i )
 fields.push_back( m_fields->at( i ) );
 
 // Reference has a specific initialization, depending on the current active sheet
 // because for a given symbol, in a complex hierarchy, there are more than one
 // reference.
 m_symbol->SetRef( &GetParent()->GetCurrentSheet(), m_fields->at( REFERENCE_FIELD ).GetText() );
 
 // Similar for Value and Footprint, except that the GUI behaviour is that they are kept
 // in sync between multiple instances.
 m_symbol->SetValueFieldText( m_fields->at( VALUE_FIELD ).GetText() );
 m_symbol->SetFootprintFieldText( m_fields->at( FOOTPRINT_FIELD ).GetText() );
 
 m_symbol->SetIncludeInBom( !m_cbExcludeFromBom->IsChecked() );
 m_symbol->SetIncludeOnBoard( !m_cbExcludeFromBoard->IsChecked() );
 m_symbol->SetDNP( m_cbDNP->IsChecked() );
 
 // Update any assignments
 if( m_dataModel )
 {
 for( const SCH_PIN& model_pin : *m_dataModel )
 {
 // map from the edited copy back to the "real" pin in the symbol.
 SCH_PIN* src_pin = m_symbol->GetPin( model_pin.GetNumber() );
 
 if( src_pin )
 src_pin->SetAlt( model_pin.GetAlt() );
 }
 }
 
 // Keep fields other than the reference, include/exclude flags, and alternate pin assignements
 // in sync in multi-unit parts.
 if( m_symbol->GetUnitCount() > 1 && m_symbol->IsAnnotated( &GetParent()->GetCurrentSheet() ) )
 {
 wxString ref = m_symbol->GetRef( &GetParent()->GetCurrentSheet() );
 int unit = m_symbol->GetUnit();
 LIB_ID libId = m_symbol->GetLibId();
 
 for( SCH_SHEET_PATH& sheet : GetParent()->Schematic().GetSheets() )
 {
 SCH_SCREEN* screen = sheet.LastScreen();
 std::vector<SCH_SYMBOL*> otherUnits;
 constexpr bool appendUndo = true;
 
 CollectOtherUnits( ref, unit, libId, sheet, &otherUnits );
 
 for( SCH_SYMBOL* otherUnit : otherUnits )
 {
 GetParent()->SaveCopyInUndoList( screen, otherUnit, UNDO_REDO::CHANGED,
 appendUndo );
 otherUnit->SetValueFieldText( m_fields->at( VALUE_FIELD ).GetText() );
 otherUnit->SetFootprintFieldText( m_fields->at( FOOTPRINT_FIELD ).GetText() );
 
 for( size_t ii = DATASHEET_FIELD; ii < m_fields->size(); ++ii )
 {
 SCH_FIELD* otherField = otherUnit->FindField( m_fields->at( ii ).GetName() );
 
 if( otherField )
 {
 otherField->SetText( m_fields->at( ii ).GetText() );
 }
 else
 {
 SCH_FIELD newField( m_fields->at( ii ) );
 const_cast<KIID&>( newField.m_Uuid ) = KIID();
 
 newField.Offset( -m_symbol->GetPosition() );
 newField.Offset( otherUnit->GetPosition() );
 
 newField.SetParent( otherUnit );
 otherUnit->AddField( newField );
 }
 }
 
 for( size_t ii = otherUnit->GetFields().size() - 1; ii > DATASHEET_FIELD; ii-- )
 {
 SCH_FIELD& otherField = otherUnit->GetFields().at( ii );
 
 if( !m_symbol->FindField( otherField.GetName() ) )
 otherUnit->GetFields().erase( otherUnit->GetFields().begin() + ii );
 }
 
 otherUnit->SetIncludeInBom( !m_cbExcludeFromBom->IsChecked() );
 otherUnit->SetIncludeOnBoard( !m_cbExcludeFromBoard->IsChecked() );
 otherUnit->SetDNP( m_cbDNP->IsChecked() );
 
 if( m_dataModel )
 {
 for( const SCH_PIN& model_pin : *m_dataModel )
 {
 SCH_PIN* src_pin = otherUnit->GetPin( model_pin.GetNumber() );
 
 if( src_pin )
 src_pin->SetAlt( model_pin.GetAlt() );
 }
 }
 
 GetParent()->UpdateItem( otherUnit, false, true );
 }
 }
 }
 
 currentScreen->Append( m_symbol );
 GetParent()->TestDanglingEnds();
 GetParent()->UpdateItem( m_symbol, false, true );
 GetParent()->OnModify();
 
 // This must go after OnModify() so that the connectivity graph will have been updated.
 GetParent()->GetToolManager()->PostEvent( EVENTS::SelectedItemsModified );
 
 return true;
}
 
 
void DIALOG_SYMBOL_PROPERTIES::OnGridCellChanging( wxGridEvent& event )
{
 wxGridCellEditor* editor = m_fieldsGrid->GetCellEditor( event.GetRow(), event.GetCol() );
 wxControl* control = editor->GetControl();
 
 if( control && control->GetValidator() && !control->GetValidator()->Validate( control ) )
 {
 event.Veto();
 wxCommandEvent *evt = new wxCommandEvent( SYMBOL_DELAY_FOCUS );
 evt->SetClientData( new VECTOR2I( event.GetRow(), event.GetCol() ) );
 QueueEvent( evt );
 }
 else if( event.GetCol() == FDC_NAME )
 {
 wxString newName = event.GetString();
 
 for( int i = 0; i < m_fieldsGrid->GetNumberRows(); ++i )
 {
 if( i == event.GetRow() )
 continue;
 
 if( newName.CmpNoCase( m_fieldsGrid->GetCellValue( i, FDC_NAME ) ) == 0 )
 {
 DisplayError( this, wxString::Format( _( "Field name '%s' already in use." ),
 newName ) );
 event.Veto();
 wxCommandEvent *evt = new wxCommandEvent( SYMBOL_DELAY_FOCUS );
 evt->SetClientData( new VECTOR2I( event.GetRow(), event.GetCol() ) );
 QueueEvent( evt );
 }
  }
 }
 
 editor->DecRef();
}
 
 
void DIALOG_SYMBOL_PROPERTIES::OnGridEditorShown( wxGridEvent& aEvent )
{
 if( aEvent.GetRow() == REFERENCE_FIELD && aEvent.GetCol() == FDC_VALUE )
 QueueEvent( new wxCommandEvent( SYMBOL_DELAY_SELECTION ) );
 
 m_editorShown = true;
}
 
 
void DIALOG_SYMBOL_PROPERTIES::OnGridEditorHidden( wxGridEvent& aEvent )
{
 m_editorShown = false;
}
 
 
void DIALOG_SYMBOL_PROPERTIES::OnAddField( wxCommandEvent& event )
{
 if( !m_fieldsGrid->CommitPendingChanges() )
 return;
 
 SCHEMATIC_SETTINGS& settings = m_symbol->Schematic()->Settings();
 int fieldID = (int) m_fields->size();
 SCH_FIELD newField( VECTOR2I( 0, 0 ), fieldID, m_symbol,
 TEMPLATE_FIELDNAME::GetDefaultFieldName( fieldID, DO_TRANSLATE ) );
 
 newField.SetTextAngle( m_fields->at( REFERENCE_FIELD ).GetTextAngle() );
 newField.SetTextSize( VECTOR2I( settings.m_DefaultTextSize, settings.m_DefaultTextSize ) );
 
 m_fields->push_back( newField );
 
 // notify the grid
 wxGridTableMessage msg( m_fields, wxGRIDTABLE_NOTIFY_ROWS_APPENDED, 1 );
 m_fieldsGrid->ProcessTableMessage( msg );
 
 m_fieldsGrid->MakeCellVisible( (int) m_fields->size() - 1, 0 );
 m_fieldsGrid->SetGridCursor( (int) m_fields->size() - 1, 0 );
 
 m_fieldsGrid->EnableCellEditControl();
 m_fieldsGrid->ShowCellEditControl();
 
 OnModify();
}
 
 
void DIALOG_SYMBOL_PROPERTIES::OnDeleteField( wxCommandEvent& event )
{
 wxArrayInt selectedRows = m_fieldsGrid->GetSelectedRows();
 
 if( selectedRows.empty() && m_fieldsGrid->GetGridCursorRow() >= 0 )
 selectedRows.push_back( m_fieldsGrid->GetGridCursorRow() );
 
 if( selectedRows.empty() )
 return;
 
 for( int row : selectedRows )
 {
 if( row < MANDATORY_FIELDS )
 {
 DisplayError( this, wxString::Format( _( "The first %d fields are mandatory." ),
 MANDATORY_FIELDS ) );
 return;
 }
 }
 
 m_fieldsGrid->CommitPendingChanges( true /* quiet mode */ );
 m_fieldsGrid->ClearSelection();
 
 // Reverse sort so deleting a row doesn't change the indexes of the other rows.
 selectedRows.Sort( []( int* first, int* second ) { return *second - *first; } );
 
 for( int row : selectedRows )
 {
 m_fields->erase( m_fields->begin() + row );
 
 // notify the grid
 wxGridTableMessage msg( m_fields, wxGRIDTABLE_NOTIFY_ROWS_DELETED, row, 1 );
 m_fieldsGrid->ProcessTableMessage( msg );
 
 if( m_fieldsGrid->GetNumberRows() > 0 )
 {
 m_fieldsGrid->MakeCellVisible( std::max( 0, row-1 ), m_fieldsGrid->GetGridCursorCol() );
 m_fieldsGrid->SetGridCursor( std::max( 0, row-1 ), m_fieldsGrid->GetGridCursorCol() );
 }
 }
 
 OnModify();
}
 
 
void DIALOG_SYMBOL_PROPERTIES::OnMoveUp( wxCommandEvent& event )
{
 if( !m_fieldsGrid->CommitPendingChanges() )
 return;
 
 int i = m_fieldsGrid->GetGridCursorRow();
 
 if( i > MANDATORY_FIELDS )
 {
 SCH_FIELD tmp = m_fields->at( (unsigned) i );
 m_fields->erase( m_fields->begin() + i, m_fields->begin() + i + 1 );
 m_fields->insert( m_fields->begin() + i - 1, tmp );
 m_fieldsGrid->ForceRefresh();
 
 m_fieldsGrid->SetGridCursor( i - 1, m_fieldsGrid->GetGridCursorCol() );
 m_fieldsGrid->MakeCellVisible( m_fieldsGrid->GetGridCursorRow(),
 m_fieldsGrid->GetGridCursorCol() );
 
 OnModify();
 }
 else
 {
 wxBell();
 }
}
 
 
void DIALOG_SYMBOL_PROPERTIES::OnMoveDown( wxCommandEvent& event )
{
 if( !m_fieldsGrid->CommitPendingChanges() )
 return;
 
 int i = m_fieldsGrid->GetGridCursorRow();
 
 if( i >= MANDATORY_FIELDS && i < m_fieldsGrid->GetNumberRows() - 1 )
 {
 SCH_FIELD tmp = m_fields->at( (unsigned) i );
 m_fields->erase( m_fields->begin() + i, m_fields->begin() + i + 1 );
 m_fields->insert( m_fields->begin() + i + 1, tmp );
 m_fieldsGrid->ForceRefresh();
 
 m_fieldsGrid->SetGridCursor( i + 1, m_fieldsGrid->GetGridCursorCol() );
 m_fieldsGrid->MakeCellVisible( m_fieldsGrid->GetGridCursorRow(),
 m_fieldsGrid->GetGridCursorCol() );
 
 OnModify();
 }
 else
 {
 wxBell();
 }
}
 
 
void DIALOG_SYMBOL_PROPERTIES::OnEditSymbol( wxCommandEvent& )
{
 if( TransferDataFromWindow() )
 EndQuasiModal( SYMBOL_PROPS_EDIT_SCHEMATIC_SYMBOL );
}
 
 
void DIALOG_SYMBOL_PROPERTIES::OnEditLibrarySymbol( wxCommandEvent& )
{
 if( TransferDataFromWindow() )
 EndQuasiModal( SYMBOL_PROPS_EDIT_LIBRARY_SYMBOL );
}
 
 
void DIALOG_SYMBOL_PROPERTIES::OnUpdateSymbol( wxCommandEvent& )
{
 if( TransferDataFromWindow() )
 EndQuasiModal( SYMBOL_PROPS_WANT_UPDATE_SYMBOL );
}
 
 
void DIALOG_SYMBOL_PROPERTIES::OnExchangeSymbol( wxCommandEvent& )
{
 if( TransferDataFromWindow() )
 EndQuasiModal( SYMBOL_PROPS_WANT_EXCHANGE_SYMBOL );
}
 
 
void DIALOG_SYMBOL_PROPERTIES::OnPinTableCellEdited( wxGridEvent& aEvent )
{
 int row = aEvent.GetRow();
 
 if( m_pinGrid->GetCellValue( row, COL_ALT_NAME )
 == m_dataModel->GetValue( row, COL_BASE_NAME ) )
 {
 m_dataModel->SetValue( row, COL_ALT_NAME, wxEmptyString );
 }
 
 // These are just to get the cells refreshed
 m_dataModel->SetValue( row, COL_TYPE, m_dataModel->GetValue( row, COL_TYPE ) );
 m_dataModel->SetValue( row, COL_SHAPE, m_dataModel->GetValue( row, COL_SHAPE ) );
 
 OnModify();
}
 
 
void DIALOG_SYMBOL_PROPERTIES::OnPinTableColSort( wxGridEvent& aEvent )
{
 int sortCol = aEvent.GetCol();
 bool ascending;
 
 // This is bonkers, but wxWidgets doesn't tell us ascending/descending in the
 // event, and if we ask it will give us pre-event info.
 if( m_pinGrid->IsSortingBy( sortCol ) )
 // same column; invert ascending
 ascending = !m_pinGrid->IsSortOrderAscending();
 else
 // different column; start with ascending
 ascending = true;
 
 m_dataModel->SortRows( sortCol, ascending );
 m_dataModel->BuildAttrs();
}
 
 
void DIALOG_SYMBOL_PROPERTIES::AdjustFieldsGridColumns()
{
 wxGridUpdateLocker deferRepaintsTillLeavingScope( m_fieldsGrid );
 
 // Account for scroll bars
 int fieldsWidth = KIPLATFORM::UI::GetUnobscuredSize( m_fieldsGrid ).x;
 
 m_fieldsGrid->AutoSizeColumn( 0 );
 m_fieldsGrid->SetColSize( 0, std::max( 72, m_fieldsGrid->GetColSize( 0 ) ) );
 
 int fixedColsWidth = m_fieldsGrid->GetColSize( 0 );
 
 for( int i = 2; i < m_fieldsGrid->GetNumberCols(); i++ )
 fixedColsWidth += m_fieldsGrid->GetColSize( i );
 
 m_fieldsGrid->SetColSize( 1, std::max( 120, fieldsWidth - fixedColsWidth ) );
}
 
 
void DIALOG_SYMBOL_PROPERTIES::AdjustPinsGridColumns()
{
 wxGridUpdateLocker deferRepaintsTillLeavingScope( m_pinGrid );
 
 // Account for scroll bars
 int pinTblWidth = KIPLATFORM::UI::GetUnobscuredSize( m_pinGrid ).x;
 
 // Stretch the Base Name and Alternate Assignment columns to fit.
 for( int i = 0; i < COL_COUNT; ++i )
 {
 if( i != COL_BASE_NAME && i != COL_ALT_NAME )
 pinTblWidth -= m_pinGrid->GetColSize( i );
 }
 
 m_pinGrid->SetColSize( COL_BASE_NAME, pinTblWidth / 2 );
 m_pinGrid->SetColSize( COL_ALT_NAME, pinTblWidth / 2 );
}
 
 
void DIALOG_SYMBOL_PROPERTIES::OnUpdateUI( wxUpdateUIEvent& event )
{
 wxString shownColumns = m_fieldsGrid->GetShownColumns();
 
 if( shownColumns != m_shownColumns )
 {
 m_shownColumns = shownColumns;
 
 if( !m_fieldsGrid->IsCellEditControlShown() )
 AdjustFieldsGridColumns();
 }
 
#ifdef KICAD_SPICE
 wxString simEnable;
 
 for( int ii = MANDATORY_FIELDS; ii < m_fieldsGrid->GetNumberRows(); ++ii )
 {
 if( m_fieldsGrid->GetCellValue( ii, FDC_NAME ) == SIM_ENABLE_FIELD )
 {
 simEnable = m_fieldsGrid->GetCellValue( ii, FDC_VALUE );
 break;
 }
 }
 
 m_cbExcludeFromSim->SetValue( simEnable == wxS( "0" ) );
#endif
}
 
 
void DIALOG_SYMBOL_PROPERTIES::HandleDelayedFocus( wxCommandEvent& event )
{
 VECTOR2I *loc = static_cast<VECTOR2I*>( event.GetClientData() );
 
 wxCHECK_RET( loc, wxT( "Missing focus cell location" ) );
 
 // Handle a delayed focus
 
 m_fieldsGrid->SetFocus();
 m_fieldsGrid->MakeCellVisible( loc->x, loc->y );
 m_fieldsGrid->SetGridCursor( loc->x, loc->y );
 
  m_fieldsGrid->EnableCellEditControl( true );
 m_fieldsGrid->ShowCellEditControl();
 
 delete loc;
}
 
 
void DIALOG_SYMBOL_PROPERTIES::HandleDelayedSelection( wxCommandEvent& event )
{
 // Handle a delayed selection
 wxGridCellEditor* cellEditor = m_fieldsGrid->GetCellEditor( REFERENCE_FIELD, FDC_VALUE );
 
 if( wxTextEntry* txt = dynamic_cast<wxTextEntry*>( cellEditor->GetControl() ) )
 KIUI::SelectReferenceNumber( txt );
 
 cellEditor->DecRef(); // we're done; must release
}
 
void DIALOG_SYMBOL_PROPERTIES::OnSizeFieldsGrid( wxSizeEvent& event )
{
 wxSize new_size = event.GetSize();
 
 if( ( !m_editorShown || m_lastRequestedSize != new_size ) && m_fieldsSize != new_size )
 {
 m_fieldsSize = new_size;
 
 AdjustFieldsGridColumns();
 }
 
 // We store this value to check whether the dialog is changing size. This might indicate
 // that the user is scaling the dialog with an editor shown. Some editors do not close
 // (at least on GTK) when the user drags a dialog corner
 m_lastRequestedSize = new_size;
 
 // Always propagate for a grid repaint (needed if the height changes, as well as width)
 event.Skip();
}
 
 
void DIALOG_SYMBOL_PROPERTIES::OnSizePinsGrid( wxSizeEvent& event )
{
 wxSize new_size = event.GetSize();
 
 if( m_pinsSize != new_size )
 {
 m_pinsSize = new_size;
 
 AdjustPinsGridColumns();
 }
 
 // Always propagate for a grid repaint (needed if the height changes, as well as width)
 event.Skip();
}
 
 
void DIALOG_SYMBOL_PROPERTIES::OnInitDlg( wxInitDialogEvent& event )
{
 TransferDataToWindow();
 
 // Now all widgets have the size fixed, call FinishDialogSettings
 finishDialogSettings();
 
 EESCHEMA_SETTINGS* cfg = dynamic_cast<EESCHEMA_SETTINGS*>( Kiface().KifaceSettings() );
 
 if( cfg && cfg->m_Appearance.edit_symbol_width > 0 && cfg->m_Appearance.edit_symbol_height > 0 )
 SetSize( cfg->m_Appearance.edit_symbol_width, cfg->m_Appearance.edit_symbol_height );
}
 
 
void DIALOG_SYMBOL_PROPERTIES::OnCheckBox( wxCommandEvent& event )
{
 OnModify();
}
 
 
void DIALOG_SYMBOL_PROPERTIES::OnUnitChoice( wxCommandEvent& event )
{
 if( m_dataModel )
 {
 EDA_ITEM_FLAGS flags = m_symbol->GetFlags();
 
 int unit_selection = m_unitChoice->GetSelection() + 1;
 
 // We need to select a new unit to build the new unit pin list
 // but we should not change the symbol, so the initial unit will be selected
 // after rebuilding the pin list
 int old_unit = m_symbol->GetUnit();
 m_symbol->SetUnit( unit_selection );
 
 // Rebuild a copy of the pins of the new unit for editing
 m_dataModel->clear();
 
 for( const std::unique_ptr<SCH_PIN>& pin : m_symbol->GetRawPins() )
 m_dataModel->push_back( *pin );
 
 m_dataModel->SortRows( COL_NUMBER, true );
 m_dataModel->BuildAttrs();
 
 m_symbol->SetUnit( old_unit );
 
 // Restore m_Flag modified by SetUnit()
 m_symbol->ClearFlags();
 m_symbol->SetFlags( flags );
 }
 
 OnModify();
}
 
 
void DIALOG_SYMBOL_PROPERTIES::onUpdateEditSymbol( wxUpdateUIEvent& event )
{
 event.Enable( m_symbol && m_symbol->GetLibSymbolRef() );
}
 
 
void DIALOG_SYMBOL_PROPERTIES::onUpdateEditLibrarySymbol( wxUpdateUIEvent& event )
{
 event.Enable( m_symbol && m_symbol->GetLibSymbolRef() );
}