symbol_editor_control.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2019 CERN
 * Copyright (C) 2019-2022 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 <kiway.h>
#include <pgm_base.h>
#include <sch_painter.h>
#include <tool/tool_manager.h>
#include <tools/ee_actions.h>
#include <tools/symbol_editor_control.h>
#include <symbol_edit_frame.h>
#include <lib_symbol_library_manager.h>
#include <symbol_viewer_frame.h>
#include <symbol_tree_model_adapter.h>
#include <wildcards_and_files_ext.h>
#include <bitmaps/bitmap_types.h>
#include <confirm.h>
#include <wx/filedlg.h>
#include "wx/generic/textdlgg.h"
#include "string_utils.h"
 
bool SYMBOL_EDITOR_CONTROL::Init()
{
 m_frame = getEditFrame<SCH_BASE_FRAME>();
 m_selectionTool = m_toolMgr->GetTool<EE_SELECTION_TOOL>();
 m_isSymbolEditor = m_frame->IsType( FRAME_SCH_SYMBOL_EDITOR );
 
 if( m_isSymbolEditor )
 {
 CONDITIONAL_MENU& ctxMenu = m_menu.GetMenu();
 SYMBOL_EDIT_FRAME* editFrame = getEditFrame<SYMBOL_EDIT_FRAME>();
 
 wxCHECK( editFrame, false );
 
 auto libSelectedCondition =
 [ editFrame ]( const SELECTION& aSel )
 {
 LIB_ID sel = editFrame->GetTreeLIBID();
 return !sel.GetLibNickname().empty() && sel.GetLibItemName().empty();
 };
 // The libInferredCondition allows you to do things like New Symbol and Paste with a
 // symbol selected (in other words, when we know the library context even if the library
 // itself isn't selected.
 auto libInferredCondition =
 [ editFrame ]( const SELECTION& aSel )
 {
 LIB_ID sel = editFrame->GetTreeLIBID();
 return !sel.GetLibNickname().empty();
 };
 auto pinnedLibSelectedCondition =
 [ editFrame ]( const SELECTION& aSel )
 {
 LIB_TREE_NODE* current = editFrame->GetCurrentTreeNode();
 return current && current->m_Type == LIB_TREE_NODE::LIB && current->m_Pinned;
 };
 auto unpinnedLibSelectedCondition =
 [ editFrame ](const SELECTION& aSel )
 {
 LIB_TREE_NODE* current = editFrame->GetCurrentTreeNode();
 return current && current->m_Type == LIB_TREE_NODE::LIB && !current->m_Pinned;
 };
 auto symbolSelectedCondition =
 [ editFrame ]( const SELECTION& aSel )
 {
 LIB_ID sel = editFrame->GetTargetLibId();
 return !sel.GetLibNickname().empty() && !sel.GetLibItemName().empty();
 };
 auto saveSymbolAsCondition =
 [ editFrame ]( const SELECTION& aSel )
 {
 LIB_ID sel = editFrame->GetTargetLibId();
 return !sel.GetLibNickname().empty() && !sel.GetLibItemName().empty();
 };
  auto multiSelectedCondition =
 [ editFrame ]( const SELECTION& aSel )
 {
 return editFrame->GetTreeSelectionCount() > 1;
 };
 
 ctxMenu.AddItem( ACTIONS::pinLibrary, unpinnedLibSelectedCondition );
 ctxMenu.AddItem( ACTIONS::unpinLibrary, pinnedLibSelectedCondition );
 
 ctxMenu.AddSeparator();
 ctxMenu.AddItem( EE_ACTIONS::newSymbol, libInferredCondition );
 
 ctxMenu.AddSeparator();
 ctxMenu.AddItem( ACTIONS::save, symbolSelectedCondition || libInferredCondition );
 ctxMenu.AddItem( EE_ACTIONS::saveLibraryAs, libSelectedCondition );
 ctxMenu.AddItem( EE_ACTIONS::saveSymbolAs, saveSymbolAsCondition );
 ctxMenu.AddItem( ACTIONS::revert,  symbolSelectedCondition || libInferredCondition );
 
 ctxMenu.AddSeparator();
 ctxMenu.AddItem( EE_ACTIONS::cutSymbol, symbolSelectedCondition || multiSelectedCondition );
 ctxMenu.AddItem( EE_ACTIONS::copySymbol, symbolSelectedCondition || multiSelectedCondition );
 ctxMenu.AddItem( EE_ACTIONS::pasteSymbol, libInferredCondition );
 ctxMenu.AddItem( EE_ACTIONS::duplicateSymbol, symbolSelectedCondition );
 ctxMenu.AddItem( EE_ACTIONS::renameSymbol, symbolSelectedCondition );
 ctxMenu.AddItem( EE_ACTIONS::deleteSymbol, symbolSelectedCondition || multiSelectedCondition );
 
 ctxMenu.AddSeparator();
 ctxMenu.AddItem( EE_ACTIONS::importSymbol, libInferredCondition );
 ctxMenu.AddItem( EE_ACTIONS::exportSymbol, symbolSelectedCondition );
 
 // If we've got nothing else to show, at least show a hide tree option
 ctxMenu.AddItem( EE_ACTIONS::hideSymbolTree, !libInferredCondition );
 }
 
 return true;
}
 
 
int SYMBOL_EDITOR_CONTROL::AddLibrary( const TOOL_EVENT& aEvent )
{
 bool createNew = aEvent.IsAction( &ACTIONS::newLibrary );
 
 if( m_frame->IsType( FRAME_SCH_SYMBOL_EDITOR ) )
 static_cast<SYMBOL_EDIT_FRAME*>( m_frame )->AddLibraryFile( createNew );
 
 return 0;
}
 
 
int SYMBOL_EDITOR_CONTROL::DdAddLibrary( const TOOL_EVENT& aEvent )
{
 wxString libFile = *aEvent.Parameter<wxString*>();
 if( m_frame->IsType( FRAME_SCH_SYMBOL_EDITOR ) )
 static_cast<SYMBOL_EDIT_FRAME*>( m_frame )->DdAddLibrary( libFile );
 
 return 0;
}
 
 
int SYMBOL_EDITOR_CONTROL::EditSymbol( const TOOL_EVENT& aEvent )
{
 if( m_frame->IsType( FRAME_SCH_SYMBOL_EDITOR ) )
 {
 SYMBOL_EDIT_FRAME* editFrame = static_cast<SYMBOL_EDIT_FRAME*>( m_frame );
 int unit = 0;
 LIB_ID partId = editFrame->GetTreeLIBID( &unit );
 
 editFrame->LoadSymbol( partId.GetLibItemName(), partId.GetLibNickname(), unit );
 }
 
 return 0;
}
 
 
int SYMBOL_EDITOR_CONTROL::AddSymbol( const TOOL_EVENT& aEvent )
{
 if( m_frame->IsType( FRAME_SCH_SYMBOL_EDITOR ) )
 {
 SYMBOL_EDIT_FRAME* editFrame = static_cast<SYMBOL_EDIT_FRAME*>( m_frame );
 
 LIB_ID sel = editFrame->GetTreeLIBID();
 const wxString& libName = sel.GetLibNickname();
 wxString msg;
 
 if( libName.IsEmpty() )
 {
 msg.Printf( _( "No symbol library selected." ) );
 m_frame->ShowInfoBarError( msg );
 return 0;
 }
 
 if( editFrame->GetLibManager().IsLibraryReadOnly( libName ) )
 {
 msg.Printf( _( "Symbol library '%s' is not writable." ), libName );
 m_frame->ShowInfoBarError( msg );
 return 0;
 }
 
 if( aEvent.IsAction( &EE_ACTIONS::newSymbol ) )
 editFrame->CreateNewSymbol();
 else if( aEvent.IsAction( &EE_ACTIONS::importSymbol ) )
 editFrame->ImportSymbol();
 }
 
 return 0;
}
 
 
int SYMBOL_EDITOR_CONTROL::Save( const TOOL_EVENT& aEvt )
{
 if( m_frame->IsType( FRAME_SCH_SYMBOL_EDITOR ) )
 {
 SYMBOL_EDIT_FRAME* editFrame = static_cast<SYMBOL_EDIT_FRAME*>( m_frame );
 
 if( aEvt.IsAction( &EE_ACTIONS::save ) )
 editFrame->Save();
 else if( aEvt.IsAction( &EE_ACTIONS::saveLibraryAs ) )
 editFrame->SaveLibraryAs();
 else if( aEvt.IsAction( &EE_ACTIONS::saveSymbolAs ) )
 editFrame->SaveSymbolAs();
 else if( aEvt.IsAction( &EE_ACTIONS::saveAll ) )
 editFrame->SaveAll();
 }
 
 return 0;
}
 
 
int SYMBOL_EDITOR_CONTROL::Revert( const TOOL_EVENT& aEvent )
{
 if( m_frame->IsType( FRAME_SCH_SYMBOL_EDITOR ) )
 static_cast<SYMBOL_EDIT_FRAME*>( m_frame )->Revert();
 
 return 0;
}
 
 
int SYMBOL_EDITOR_CONTROL::ExportSymbol( const TOOL_EVENT& aEvent )
{
 if( m_frame->IsType( FRAME_SCH_SYMBOL_EDITOR ) )
 static_cast<SYMBOL_EDIT_FRAME*>( m_frame )->ExportSymbol();
 
 return 0;
}
 
 
int SYMBOL_EDITOR_CONTROL::CutCopyDelete( const TOOL_EVENT& aEvt )
{
 if( m_frame->IsType( FRAME_SCH_SYMBOL_EDITOR ) )
 {
 SYMBOL_EDIT_FRAME* editFrame = static_cast<SYMBOL_EDIT_FRAME*>( m_frame );
 
 if( aEvt.IsAction( &EE_ACTIONS::cutSymbol ) || aEvt.IsAction( &EE_ACTIONS::copySymbol ) )
 editFrame->CopySymbolToClipboard();
 
 if( aEvt.IsAction( &EE_ACTIONS::cutSymbol ) || aEvt.IsAction( &EE_ACTIONS::deleteSymbol ) )
 {
 bool hasWritableLibs = false;
 wxString msg;
 
 for( LIB_ID& sel : editFrame->GetSelectedLibIds() )
 {
 const wxString& libName = sel.GetLibNickname();
 
 if( editFrame->GetLibManager().IsLibraryReadOnly( libName ) )
 msg.Printf( _( "Symbol library '%s' is not writable." ), libName );
 else
 hasWritableLibs = true;
 }
 
 if( !msg.IsEmpty() )
 m_frame->ShowInfoBarError( msg );
 
 if( !hasWritableLibs )
 return 0;
 
 editFrame->DeleteSymbolFromLibrary();
 }
 }
 
 return 0;
}
 
 
int SYMBOL_EDITOR_CONTROL::DuplicateSymbol( const TOOL_EVENT& aEvent )
{
 if( m_frame->IsType( FRAME_SCH_SYMBOL_EDITOR ) )
 {
 SYMBOL_EDIT_FRAME* editFrame = static_cast<SYMBOL_EDIT_FRAME*>( m_frame );
 LIB_ID sel = editFrame->GetTargetLibId();
 // DuplicateSymbol() is called to duplicate a symbol, or to paste a previously
 // saved symbol in clipboard
 bool isPasteAction = aEvent.IsAction( &EE_ACTIONS::pasteSymbol );
 wxString msg;
 
 if( !sel.IsValid() && !isPasteAction )
 {
 // When duplicating a symbol, a source symbol must exists.
 msg.Printf( _( "No symbol selected" ) );
 m_frame->ShowInfoBarError( msg );
 return 0;
 }
 
 const wxString& libName = sel.GetLibNickname();
 
 if( editFrame->GetLibManager().IsLibraryReadOnly( libName ) )
 {
 msg.Printf( _( "Symbol library '%s' is not writable." ), libName );
 m_frame->ShowInfoBarError( msg );
 return 0;
 }
 
 editFrame->DuplicateSymbol( isPasteAction );
 }
 
 return 0;
}
 
 
int SYMBOL_EDITOR_CONTROL::RenameSymbol( const TOOL_EVENT& aEvent )
{
 if( m_frame->IsType( FRAME_SCH_SYMBOL_EDITOR ) )
 {
 SYMBOL_EDIT_FRAME* editFrame = static_cast<SYMBOL_EDIT_FRAME*>( m_frame );
 LIB_SYMBOL_LIBRARY_MANAGER& libMgr = editFrame->GetLibManager();
 
 LIB_ID libId = editFrame->GetTreeLIBID();
 wxString libName = libId.GetLibNickname();
 wxString symbolName = libId.GetLibItemName();
 wxString newName = symbolName;
 bool done = false;
 
 if( !libMgr.LibraryExists( libName ) )
 return 0;
 
 while( !done )
 {
 wxTextEntryDialog dlg( m_frame, _( "New name:" ), _( "Change Symbol Name" ), newName );
 
 if( dlg.ShowModal() != wxID_OK )
 return 0; // canceled by user
 
 newName = EscapeString( dlg.GetValue(), CTX_LIBID );
 newName.Trim( true ).Trim( false );
 
 if( newName.IsEmpty() )
 {
 DisplayErrorMessage( editFrame, _( "Symbol name cannot be empty." ) );
 }
 else if( libMgr.SymbolExists( newName, libName ) )
 {
 DisplayErrorMessage( editFrame, wxString::Format( _( "Symbol name '%s' already "
 "in use in library '%s'." ),
 UnescapeString( newName ),
 libName ) );
 newName = symbolName;
 }
 else
 {
 done = true;
 }
 }
 
 wxString oldName = symbolName;
 LIB_SYMBOL* libSymbol = nullptr;
 
 if( editFrame->IsCurrentSymbol( libId ) )
 {
 // Update buffered copy
 libSymbol = libMgr.GetBufferedSymbol( oldName, libName );
 
 libSymbol->SetName( newName );
 libSymbol->GetFieldById( VALUE_FIELD )->SetText( newName );
 
 libMgr.UpdateSymbolAfterRename( libSymbol, newName, libName );
 
 // Now update canvasy copy
 libSymbol = editFrame->GetCurSymbol();
 
 libSymbol->SetName( newName );
 libSymbol->GetFieldById( VALUE_FIELD )->SetText( newName );
 
 editFrame->RebuildView();
 editFrame->OnModify();
 
 // N.B. The view needs to be rebuilt first as the Symbol Properties change may
 // invalidate the view pointers by rebuilting the field table
 editFrame->UpdateMsgPanel();
 }
 else
 {
 libSymbol = libMgr.GetBufferedSymbol( oldName, libName );
 
 libSymbol->SetName( newName );
 libSymbol->GetFieldById( VALUE_FIELD )->SetText( newName );
 
 libMgr.UpdateSymbolAfterRename( libSymbol, newName, libName );
 libMgr.SetSymbolModified( newName, libName );
 }
 
 wxDataViewItem treeItem = libMgr.GetAdapter()->FindItem( libId );
 editFrame->UpdateLibraryTree( treeItem, libSymbol );
 editFrame->FocusOnLibId( LIB_ID( libName, newName ) );
 }
 
 return 0;
}
 
 
int SYMBOL_EDITOR_CONTROL::OnDeMorgan( const TOOL_EVENT& aEvent )
{
 int convert = aEvent.IsAction( &EE_ACTIONS::showDeMorganStandard ) ?
 LIB_ITEM::LIB_CONVERT::BASE : LIB_ITEM::LIB_CONVERT::DEMORGAN;
 
 if( m_frame->IsType( FRAME_SCH_SYMBOL_EDITOR ) )
 {
 m_toolMgr->RunAction( ACTIONS::cancelInteractive, true );
 m_toolMgr->RunAction( EE_ACTIONS::clearSelection, true );
 
 SYMBOL_EDIT_FRAME* symbolEditor = static_cast<SYMBOL_EDIT_FRAME*>( m_frame );
 symbolEditor->SetConvert( convert );
 
 m_toolMgr->ResetTools( TOOL_BASE::MODEL_RELOAD );
 symbolEditor->RebuildView();
 }
 else if( m_frame->IsType( FRAME_SCH_VIEWER ) || m_frame->IsType( FRAME_SCH_VIEWER_MODAL ) )
 {
 SYMBOL_VIEWER_FRAME* symbolViewer = static_cast<SYMBOL_VIEWER_FRAME*>( m_frame );
 symbolViewer->SetUnitAndConvert( symbolViewer->GetUnit(), convert );
 }
 
 return 0;
}
 
 
int SYMBOL_EDITOR_CONTROL::PinLibrary( const TOOL_EVENT& aEvent )
{
 if( m_frame->IsType( FRAME_SCH_SYMBOL_EDITOR ) )
 {
 SYMBOL_EDIT_FRAME* editFrame = static_cast<SYMBOL_EDIT_FRAME*>( m_frame );
 LIB_TREE_NODE* currentNode = editFrame->GetCurrentTreeNode();
 
 if( currentNode && !currentNode->m_Pinned )
 {
 m_frame->Prj().PinLibrary( currentNode->m_LibId.GetLibNickname(), true );
 
 currentNode->m_Pinned = true;
 editFrame->RegenerateLibraryTree();
 }
 }
 
 return 0;
}
 
 
int SYMBOL_EDITOR_CONTROL::UnpinLibrary( const TOOL_EVENT& aEvent )
{
 if( m_frame->IsType( FRAME_SCH_SYMBOL_EDITOR ) )
 {
 SYMBOL_EDIT_FRAME* editFrame = static_cast<SYMBOL_EDIT_FRAME*>( m_frame );
 LIB_TREE_NODE* currentNode = editFrame->GetCurrentTreeNode();
 
 if( currentNode && currentNode->m_Pinned )
 {
 m_frame->Prj().UnpinLibrary( currentNode->m_LibId.GetLibNickname(), true );
 
 currentNode->m_Pinned = false;
 editFrame->RegenerateLibraryTree();
 }
 }
 
 return 0;
}
 
 
int SYMBOL_EDITOR_CONTROL::ToggleSymbolTree( const TOOL_EVENT& aEvent )
{
 if( m_frame->IsType( FRAME_SCH_SYMBOL_EDITOR ) )
 {
 wxCommandEvent dummy;
 static_cast<SYMBOL_EDIT_FRAME*>( m_frame )->OnToggleSymbolTree( dummy );
 }
 
 return 0;
}
 
 
int SYMBOL_EDITOR_CONTROL::ShowElectricalTypes( const TOOL_EVENT& aEvent )
{
 KIGFX::SCH_RENDER_SETTINGS* renderSettings = m_frame->GetRenderSettings();
 renderSettings->m_ShowPinsElectricalType = !renderSettings->m_ShowPinsElectricalType;
 
 // Update canvas
 m_frame->GetCanvas()->GetView()->UpdateAllItems( KIGFX::REPAINT );
 m_frame->GetCanvas()->Refresh();
 
 return 0;
}
 
 
int SYMBOL_EDITOR_CONTROL::ShowPinNumbers( const TOOL_EVENT& aEvent )
{
 KIGFX::SCH_RENDER_SETTINGS* renderSettings = m_frame->GetRenderSettings();
 renderSettings->m_ShowPinNumbers = !renderSettings->m_ShowPinNumbers;
 
 // Update canvas
 m_frame->GetCanvas()->GetView()->UpdateAllItems( KIGFX::REPAINT );
 m_frame->GetCanvas()->Refresh();
 
 return 0;
}
 
 
int SYMBOL_EDITOR_CONTROL::ToggleSyncedPinsMode( const TOOL_EVENT& aEvent )
{
 if( !m_isSymbolEditor )
 return 0;
 
 SYMBOL_EDIT_FRAME* editFrame = getEditFrame<SYMBOL_EDIT_FRAME>();
 editFrame->m_SyncPinEdit = !editFrame->m_SyncPinEdit;
 
 return 0;
}
 
 
int SYMBOL_EDITOR_CONTROL::ExportView( const TOOL_EVENT& aEvent )
{
 if( !m_isSymbolEditor )
 return 0;
 
 SYMBOL_EDIT_FRAME* editFrame = getEditFrame<SYMBOL_EDIT_FRAME>();
 LIB_SYMBOL* symbol = editFrame->GetCurSymbol();
 
 if( !symbol )
 {
 wxMessageBox( _( "No symbol to export" ) );
 return 0;
 }
 
 wxFileName fn( symbol->GetName() );
 fn.SetExt( "png" );
 
 wxString projectPath = wxPathOnly( m_frame->Prj().GetProjectFullName() );
 
 wxFileDialog dlg( editFrame, _( "Image File Name" ), projectPath, fn.GetFullName(),
 PngFileWildcard(), wxFD_SAVE | wxFD_OVERWRITE_PROMPT );
 
 if( dlg.ShowModal() == wxID_OK && !dlg.GetPath().IsEmpty() )
 {
 // calling wxYield is mandatory under Linux, after closing the file selector dialog
 // to refresh the screen before creating the PNG or JPEG image from screen
 wxYield();
 
 if( !SaveCanvasImageToFile( editFrame, dlg.GetPath(), BITMAP_TYPE::PNG ) )
 {
 wxMessageBox( wxString::Format( _( "Can't save file '%s'." ), dlg.GetPath() ) );
 }
 }
 
 return 0;
}
 
 
int SYMBOL_EDITOR_CONTROL::ExportSymbolAsSVG( const TOOL_EVENT& aEvent )
{
 if( !m_isSymbolEditor )
 return 0;
 
 SYMBOL_EDIT_FRAME* editFrame = getEditFrame<SYMBOL_EDIT_FRAME>();
 LIB_SYMBOL* symbol = editFrame->GetCurSymbol();
 
 if( !symbol )
 {
 wxMessageBox( _( "No symbol to export" ) );
 return 0;
 }
 
 wxFileName fn( symbol->GetName() );
 fn.SetExt( SVGFileExtension );
 
 wxString pro_dir = wxPathOnly( m_frame->Prj().GetProjectFullName() );
 
 wxString fullFileName = wxFileSelector( _( "SVG File Name" ), pro_dir, fn.GetFullName(),
 SVGFileExtension, SVGFileWildcard(), wxFD_SAVE,
 m_frame );
 
 if( !fullFileName.IsEmpty() )
 {
 PAGE_INFO pageSave = editFrame->GetScreen()->GetPageSettings();
 PAGE_INFO pageTemp = pageSave;
 
 BOX2I symbolBBox = symbol->GetUnitBoundingBox( editFrame->GetUnit(),
 editFrame->GetConvert(), false );
 
 // Add a small margin (10% of size)to the plot bounding box
 symbolBBox.Inflate( symbolBBox.GetSize().x * 0.1, symbolBBox.GetSize().y * 0.1 );
 
 pageTemp.SetWidthMils( schIUScale.IUToMils( symbolBBox.GetSize().x ) );
 pageTemp.SetHeightMils( schIUScale.IUToMils( symbolBBox.GetSize().y ) );
 
 // Add an offet to plot the symbol centered on the page.
 VECTOR2I plot_offset = symbolBBox.GetOrigin();
 
 editFrame->GetScreen()->SetPageSettings( pageTemp );
 editFrame->SVGPlotSymbol( fullFileName, -plot_offset );
 editFrame->GetScreen()->SetPageSettings( pageSave );
 }
 
 return 0;
}
 
 
int SYMBOL_EDITOR_CONTROL::AddSymbolToSchematic( const TOOL_EVENT& aEvent )
{
 LIB_SYMBOL* libSymbol = nullptr;
 LIB_ID libId;
 int unit, convert;
 
 if( m_isSymbolEditor )
 {
 SYMBOL_EDIT_FRAME* editFrame = getEditFrame<SYMBOL_EDIT_FRAME>();
 
 libSymbol = editFrame->GetCurSymbol();
 unit = editFrame->GetUnit();
 convert = editFrame->GetConvert();
 
 if( libSymbol )
 libId = libSymbol->GetLibId();
 }
 else
 {
 SYMBOL_VIEWER_FRAME* viewerFrame = getEditFrame<SYMBOL_VIEWER_FRAME>();
 
 if( viewerFrame->IsModal() )
 {
 // if we're modal then we just need to return the symbol selection; the caller is
 // already in a EE_ACTIONS::placeSymbol coroutine.
 viewerFrame->FinishModal();
 return 0;
 }
 else
 {
 libSymbol = viewerFrame->GetSelectedSymbol();
 unit = viewerFrame->GetUnit();
 convert = viewerFrame->GetConvert();
 
 if( libSymbol )
 libId = libSymbol->GetLibId();
 }
 }
 
 if( libSymbol )
 {
 SCH_EDIT_FRAME* schframe = (SCH_EDIT_FRAME*) m_frame->Kiway().Player( FRAME_SCH, false );
 
 if( !schframe ) // happens when the schematic editor is not active (or closed)
 {
 DisplayErrorMessage( m_frame, _( "No schematic currently open." ) );
 return 0;
 }
 
 wxWindow* blocking_dialog = schframe->Kiway().GetBlockingDialog();
 
 if( blocking_dialog )
 blocking_dialog->Close( true );
 
 wxCHECK( libSymbol->GetLibId().IsValid(), 0 );
 
 SCH_SYMBOL* symbol = new SCH_SYMBOL( *libSymbol, libId, &schframe->GetCurrentSheet(),
 unit, convert );
 
 symbol->SetParent( schframe->GetScreen() );
 
 if( schframe->eeconfig()->m_AutoplaceFields.enable )
 symbol->AutoplaceFields( /* aScreen */ nullptr, /* aManual */ false );
 
 schframe->Raise();
 schframe->GetToolManager()->RunAction( EE_ACTIONS::placeSymbol, false, symbol );
 }
 
 return 0;
}
 
 
void SYMBOL_EDITOR_CONTROL::setTransitions()
{
 Go( &SYMBOL_EDITOR_CONTROL::AddLibrary, ACTIONS::newLibrary.MakeEvent() );
 Go( &SYMBOL_EDITOR_CONTROL::AddLibrary, ACTIONS::addLibrary.MakeEvent() );
 Go( &SYMBOL_EDITOR_CONTROL::AddSymbol, EE_ACTIONS::newSymbol.MakeEvent() );
 Go( &SYMBOL_EDITOR_CONTROL::AddSymbol, EE_ACTIONS::importSymbol.MakeEvent() );
 Go( &SYMBOL_EDITOR_CONTROL::EditSymbol, EE_ACTIONS::editSymbol.MakeEvent() );
 
 Go( &SYMBOL_EDITOR_CONTROL::DdAddLibrary, ACTIONS::ddAddLibrary.MakeEvent() );
 
 Go( &SYMBOL_EDITOR_CONTROL::Save, ACTIONS::save.MakeEvent() );
 Go( &SYMBOL_EDITOR_CONTROL::Save, EE_ACTIONS::saveLibraryAs.MakeEvent() );
 Go( &SYMBOL_EDITOR_CONTROL::Save, EE_ACTIONS::saveSymbolAs.MakeEvent() );
 Go( &SYMBOL_EDITOR_CONTROL::Save, ACTIONS::saveAll.MakeEvent() );
 Go( &SYMBOL_EDITOR_CONTROL::Revert, ACTIONS::revert.MakeEvent() );
 
 Go( &SYMBOL_EDITOR_CONTROL::DuplicateSymbol, EE_ACTIONS::duplicateSymbol.MakeEvent() );
 Go( &SYMBOL_EDITOR_CONTROL::RenameSymbol, EE_ACTIONS::renameSymbol.MakeEvent() );
 Go( &SYMBOL_EDITOR_CONTROL::CutCopyDelete, EE_ACTIONS::deleteSymbol.MakeEvent() );
 Go( &SYMBOL_EDITOR_CONTROL::CutCopyDelete, EE_ACTIONS::cutSymbol.MakeEvent() );
 Go( &SYMBOL_EDITOR_CONTROL::CutCopyDelete, EE_ACTIONS::copySymbol.MakeEvent() );
 Go( &SYMBOL_EDITOR_CONTROL::DuplicateSymbol, EE_ACTIONS::pasteSymbol.MakeEvent() );
 Go( &SYMBOL_EDITOR_CONTROL::ExportSymbol, EE_ACTIONS::exportSymbol.MakeEvent() );
 Go( &SYMBOL_EDITOR_CONTROL::ExportView, EE_ACTIONS::exportSymbolView.MakeEvent() );
 Go( &SYMBOL_EDITOR_CONTROL::ExportSymbolAsSVG, EE_ACTIONS::exportSymbolAsSVG.MakeEvent() );
 Go( &SYMBOL_EDITOR_CONTROL::AddSymbolToSchematic, EE_ACTIONS::addSymbolToSchematic.MakeEvent() );
 
 Go( &SYMBOL_EDITOR_CONTROL::OnDeMorgan, EE_ACTIONS::showDeMorganStandard.MakeEvent() );
 Go( &SYMBOL_EDITOR_CONTROL::OnDeMorgan, EE_ACTIONS::showDeMorganAlternate.MakeEvent() );
 
 Go( &SYMBOL_EDITOR_CONTROL::ShowElectricalTypes, EE_ACTIONS::showElectricalTypes.MakeEvent() );
 Go( &SYMBOL_EDITOR_CONTROL::ShowPinNumbers, EE_ACTIONS::showPinNumbers.MakeEvent() );
 Go( &SYMBOL_EDITOR_CONTROL::PinLibrary, ACTIONS::pinLibrary.MakeEvent() );
 Go( &SYMBOL_EDITOR_CONTROL::UnpinLibrary, ACTIONS::unpinLibrary.MakeEvent() );
 Go( &SYMBOL_EDITOR_CONTROL::ToggleSymbolTree, EE_ACTIONS::showSymbolTree.MakeEvent() );
 Go( &SYMBOL_EDITOR_CONTROL::ToggleSymbolTree, EE_ACTIONS::hideSymbolTree.MakeEvent() );
 Go( &SYMBOL_EDITOR_CONTROL::ToggleSyncedPinsMode, EE_ACTIONS::toggleSyncedPinsMode.MakeEvent() );
}