FWPSetTableManager.cc

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// -*- C++ -*-
//
// Package:     FWInterface
// Class  :     FWPSetTableManager
// 
// Implementation:
//     [Notes on implementation]
//
// Original Author:  
//         Created:  Mon Feb 28 17:06:54 CET 2011
//

#include <map>
#include <stdexcept>

#include "Fireworks/FWInterface/src/FWPSetTableManager.h"
#include "Fireworks/FWInterface/src/FWPSetCellEditor.h"
#include "Fireworks/TableWidget/src/FWTabularWidget.h"
#include "Fireworks/TableWidget/interface/GlobalContexts.h"
#include "Fireworks/Core/interface/fwLog.h"

#include "FWCore/Framework/interface/ScheduleInfo.h"
#include "FWCore/PythonParameterSet/interface/MakeParameterSets.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "FWCore/Utilities/interface/Exception.h"
//
// constants, enums and typedefs
//

//
// static data member definitions
//


// FIXME: copied from Entry.cc should find a way to use the original
//        table.
struct TypeTrans {
   TypeTrans();

   typedef std::vector<std::string> CodeMap;
   CodeMap table_;
   std::map<std::string, char> type2Code_;
};

TypeTrans::TypeTrans():table_(255) {
   table_['b'] = "vBool";
   table_['B'] = "bool";
   table_['i'] = "vint32";
   table_['I'] = "int32";
   table_['u'] = "vuint32";
   table_['U'] = "uint32";
   table_['l'] = "vint64";
   table_['L'] = "int64";
   table_['x'] = "vuint64";
   table_['X'] = "uint64";
   table_['s'] = "vstring";
   table_['S'] = "string";
   table_['d'] = "vdouble";
   table_['D'] = "double";
   table_['p'] = "vPSet";
   table_['P'] = "PSet";
   table_['T'] = "path";
   table_['F'] = "FileInPath";
   table_['t'] = "InputTag";
   table_['v'] = "VInputTag";
   table_['g'] = "ESInputTag";
   table_['G'] = "VESInputTag";
   table_['e'] = "VEventID";
   table_['E'] = "EventID";
   table_['m'] = "VLuminosityBlockID";
   table_['M'] = "LuminosityBlockID";
   table_['a'] = "VLuminosityBlockRange";
   table_['A'] = "LuminosityBlockRange";
   table_['r'] = "VEventRange";
   table_['R'] = "EventRange";

   for(CodeMap::const_iterator itCode = table_.begin(), itCodeEnd = table_.end();
       itCode != itCodeEnd;
       ++itCode) {
      type2Code_[*itCode] = (itCode - table_.begin());
   }
}

static TypeTrans const sTypeTranslations;


//
// constructors and destructor
//

FWPSetTableManager::FWPSetTableManager()
   : m_selectedRow(-1)
{  

   TGGC* hc =  new TGGC(FWTextTableCellRenderer::getDefaultHighlightGC());
   hc->SetForeground(0xdddddd);

   m_renderer.setHighlightContext(hc);

   recalculateVisibility();
   visualPropertiesChanged();
}

FWPSetTableManager::~FWPSetTableManager()
{
}

//==============================================================================
//==============================================================================
//========== IMPORT CMSSW CONFIG TO TABLE ======================================
//==============================================================================
//==============================================================================

void FWPSetTableManager::handlePSetEntry(edm::ParameterSetEntry& entry, const std::string& key)
{
   PSetData data;
   data.label = key;
   data.tracked = entry.isTracked();
   data.level = m_parentStack.size();
   data.parent = m_parentStack.back();
   data.type = 'P';
   data.module = m_modules.size() - 1;
   data.path = m_paths.size() - 1;
   data.pset = & entry.psetForUpdate();
   data.editable = false;
   m_parentStack.push_back(m_entries.size());
   m_entries.push_back(data);

   handlePSet(data.pset);
   m_parentStack.pop_back();
}

void FWPSetTableManager::handleVPSetEntry(edm::VParameterSetEntry& entry, const std::string& key)
{
   PSetData data;
   data.label = key;
   data.tracked = entry.isTracked();
   data.level = m_parentStack.size();
   data.parent = m_parentStack.back();
   data.type = 'p';
   data.module = m_modules.size() - 1;
   data.path = m_paths.size() - 1;
   data.editable = false;
   m_parentStack.push_back(m_entries.size());
   m_entries.push_back(data);

   std::stringstream ss;

   for (size_t i = 0, e = entry.vpset().size(); i != e; ++i)
   {
      ss.str("");
      ss << key << "[" << i << "]";
      PSetData vdata;
      vdata.label = ss.str();
      vdata.tracked = entry.isTracked();
      vdata.level = m_parentStack.size();
      vdata.parent = m_parentStack.back();
      vdata.module = m_modules.size() - 1;
      vdata.path = m_paths.size() - 1;
      vdata.editable = false;
      vdata.pset = &entry.vpsetForUpdate()[i];
      m_parentStack.push_back(m_entries.size());
      m_entries.push_back(vdata);
      handlePSet( & entry.vpsetForUpdate()[i]);
      m_parentStack.pop_back();
   }
   m_parentStack.pop_back();
}

void FWPSetTableManager::handlePSet(edm::ParameterSet *psp)
{
   edm::ParameterSet &ps = * psp;

   typedef edm::ParameterSet::table::const_iterator TIterator;
   for (TIterator i = ps.tbl().begin(), e = ps.tbl().end(); i != e; ++i)
      handleEntry(i->second, i->first);

   typedef edm::ParameterSet::psettable::const_iterator PSIterator;
   for (PSIterator i = ps.psetTable().begin(), e = ps.psetTable().end(); i != e; ++i)
      handlePSetEntry(const_cast<edm::ParameterSetEntry&>(i->second), i->first);

   typedef edm::ParameterSet::vpsettable::const_iterator VPSIterator;
   for (VPSIterator i = ps.vpsetTable().begin(), e = ps.vpsetTable().end(); i != e; ++i)
      handleVPSetEntry(const_cast<edm::VParameterSetEntry&>(i->second), i->first);
}
    
template <class T>
void FWPSetTableManager::createScalarString(PSetData &data, T v)
{
   std::stringstream ss;
   ss << v;
   data.value = ss.str();
   m_entries.push_back(data);
}

template <typename T>
void FWPSetTableManager::createVectorString(FWPSetTableManager::PSetData &data, const T &v, bool quotes)
{
   std::stringstream ss;
   ss << "[";
   for (size_t ii = 0, ie = v.size(); ii != ie; ++ii)
   {
      if (quotes)
         ss << "\""; 
      ss << v[ii];
      if (quotes)
         ss << "\"";
      if (ii + 1 != ie) 
         ss << ", ";
   }
   ss << "]";
   data.value = ss.str();
   m_entries.push_back(data);
}

void FWPSetTableManager::handleEntry(const edm::Entry &entry,const std::string &key)
{
   std::stringstream ss;
   FWPSetTableManager::PSetData data;
   data.label = key;
   data.tracked = entry.isTracked();
   data.type = entry.typeCode();
   data.level = m_parentStack.size();
   data.parent = m_parentStack.back();
   data.module = m_modules.size() - 1;
   data.type = entry.typeCode();
   if (data.label[0] == '@')
      data.editable = false;
   else
      data.editable = true;

   switch(entry.typeCode())
   {
      case 'b':
      {
         data.value = entry.getBool() ? "True" : "False";
         m_entries.push_back(data);
         break;
      }
      case 'B':
      {
         data.value = entry.getBool() ? "True" : "False";
         m_entries.push_back(data);
         break;
      }
      case 'i':
      {
         createVectorString(data, entry.getVInt32(), false);
         break;
      }
      case 'I':
      {
         createScalarString(data, entry.getInt32());
         break;
      }
      case 'u':
      {
         createVectorString(data, entry.getVUInt32(), false);
         break;
      }
      case 'U':
      {
         createScalarString(data, entry.getUInt32());
         break;
      }
      case 'l':
      {
         createVectorString(data, entry.getVInt64(), false);
         break;
      }
      case 'L':
      {
         createScalarString(data, entry.getInt32());
         break;
      }
      case 'x':
      {
         createVectorString(data, entry.getVUInt64(), false);
         break;
      }
      case 'X':
      {
         createScalarString(data, entry.getUInt64());
         break;
      }
      case 's':
      {
         createVectorString(data, entry.getVString(), false);
         break;
      }
      case 'S':
      {
         createScalarString(data, entry.getString());
         break;
      }
      case 'd':
      {
         createVectorString(data, entry.getVDouble(), false);
         break;
      }
      case 'D':
      { 
         createScalarString(data, entry.getDouble());
         break;
      }
      case 'p':
      {
     // Matevz ???
     throw std::runtime_error("FWPSetTableManager::handleEntryGet, entry type 'p' not expected.");
     // std::vector<edm::ParameterSet> psets = entry.getVPSet();
     // for (size_t psi = 0, pse = psets.size(); psi != pse; ++psi)
     //    handlePSet(psets[psi]);
         break;
      }
      case 'P':
      {
     // Matevz ???
     throw std::runtime_error("FWPSetTableManager::handleEntry, entry type 'P not expected.");
     // handlePSet(entry.getPSet());
         break;
      }
      case 't':
      {
         data.value = entry.getInputTag().encode();
         m_entries.push_back(data);
         break;
      } 
      case 'v':
      {
         std::vector<std::string> tags;
         tags.resize(entry.getVInputTag().size());
         for (size_t iti = 0, ite = tags.size(); iti != ite; ++iti) 
            tags[iti] = entry.getVInputTag()[iti].encode();
         createVectorString(data, tags, true);
         break;
      }        
      case 'g':
      {
         data.value = entry.getESInputTag().encode();
         m_entries.push_back(data);
         break;
      }
      case 'G':
      {
         std::vector<std::string> tags;
         tags.resize(entry.getVESInputTag().size());
         for (size_t iti = 0, ite = tags.size(); iti != ite; ++iti) 
            tags[iti] = entry.getVESInputTag()[iti].encode();
         createVectorString(data, tags, true);
         break;
      }
      case 'F':
      {
         createScalarString(data, entry.getFileInPath().relativePath());
         break;
      }
      case 'e':
      {
         data.editable = false;
         std::vector<edm::EventID> ids;
         ids.resize(entry.getVEventID().size());
         for ( size_t iri = 0, ire = ids.size(); iri != ire; ++iri )
            ids[iri] = entry.getVEventID()[iri];
         createVectorString(data, ids, true);
         break;
      }
      case 'E':
      {
         data.editable = false;
         createScalarString(data, entry.getEventID());
         break;
      }
      case 'm':
      {
         data.editable = false;
         std::vector<edm::LuminosityBlockID> ids;
         ids.resize(entry.getVLuminosityBlockID().size());
         for ( size_t iri = 0, ire = ids.size(); iri != ire; ++iri )
            ids[iri] = entry.getVLuminosityBlockID()[iri];
         createVectorString(data, ids, true);
         break;
      }
      case 'M':
      {
         data.editable = false;
         createScalarString(data, entry.getLuminosityBlockID());
         break;
      }
      case 'a':
      {
         data.editable = false;
         std::vector<edm::LuminosityBlockRange> ranges;
         ranges.resize(entry.getVLuminosityBlockRange().size());
         for ( size_t iri = 0, ire = ranges.size(); iri != ire; ++iri )
            ranges[iri] = entry.getVLuminosityBlockRange()[iri];
         createVectorString(data, ranges, true);
         break;
      }
      case 'A':
      {
         data.editable = false;
         createScalarString(data, entry.getLuminosityBlockRange());
         break;
      }
      case 'r':
      {
         data.editable = false;
         std::vector<edm::EventRange> ranges;
         ranges.resize(entry.getVEventRange().size());
         for ( size_t iri = 0, ire = ranges.size(); iri != ire; ++iri )
            ranges[iri] = entry.getVEventRange()[iri];
         createVectorString(data, ranges, true);
         break;
      }
      case 'R':
      {
         data.editable = false;
         createScalarString(data, entry.getEventRange());
         break;          
      }
      default:
      {
         break;
      }
   }
}

/* the actual structure of the model will not change, only
   its contents, because of the way CMSSW is designed,
   hence this method only needs to be called once.
   */
void FWPSetTableManager::updateSchedule(const edm::ScheduleInfo *info)
{
   if (!m_entries.empty())
      return;
   // Execute only once since the schedule itself
   // cannot be altered.
   assert(m_availablePaths.empty());
   info->availablePaths(m_availablePaths);
         
   for (size_t i = 0, e = m_availablePaths.size(); i != e; ++i)
   {
      PSetData pathEntry;
      const std::string &pathName = m_availablePaths[i];
      pathEntry.label = pathName;
      m_pathIndex.insert(std::make_pair(pathName, m_paths.size()));

      pathEntry.value = "Path";
      pathEntry.level= 0;
      pathEntry.parent = -1;
      pathEntry.path = i;
      pathEntry.editable = false;

      PathInfo pathInfo;
      pathInfo.entryId = m_entries.size();
      pathInfo.passed = false;
      pathInfo.moduleStart = m_modules.size();
      m_paths.push_back(pathInfo);

      m_parentStack.push_back(m_entries.size());
      m_entries.push_back(pathEntry);

      std::vector<std::string> pathModules;
      info->modulesInPath(pathName, pathModules);

      for (size_t mi = 0, me = pathModules.size(); mi != me; ++mi)
      {
         PSetData moduleEntry;

         const edm::ParameterSet* ps = info->parametersForModule(pathModules[mi]);

         const edm::ParameterSet::table& pst = ps->tbl();
         const edm::ParameterSet::table::const_iterator ti = pst.find("@module_edm_type");
         if (ti == pst.end())
            moduleEntry.value = "Unknown module name";
         else
            moduleEntry.value = ti->second.getString();

         moduleEntry.label = pathModules[mi];
         moduleEntry.parent = m_parentStack.back();
         moduleEntry.level = m_parentStack.size();
         moduleEntry.module = mi;
         moduleEntry.path = i;
         moduleEntry.editable = false;

         ModuleInfo moduleInfo;
         moduleInfo.path = m_paths.size() - 1;
         moduleInfo.entry = m_entries.size();
         moduleInfo.passed = false;
         moduleInfo.dirty = false;
     moduleInfo.orig_pset    = new edm::ParameterSet(*ps);
     moduleInfo.current_pset = new edm::ParameterSet(*ps);
         m_modules.push_back(moduleInfo);

     moduleEntry.pset = moduleInfo.current_pset;

         m_parentStack.push_back(m_entries.size());
         m_entries.push_back(moduleEntry);
         handlePSet(moduleEntry.pset);
         m_parentStack.pop_back();
      }
      m_paths.back().moduleEnd = m_modules.size();
      m_parentStack.pop_back();
   }

   // Nothing is expanded by default.
   for (size_t i = 0, e = m_entries.size(); i != e; ++i)
      m_entries[i].expandedUser = false;

   m_filter = "";

   recalculateVisibility();
} //updateSchedule


void FWPSetTableManager::update(std::vector<PathUpdate> &pathUpdates)
{
   // Reset all the path / module status information, so that
   // by default paths and modules are considered "not passed".
   for (size_t pi = 0, pe = m_paths.size(); pi != pe; ++pi)
      m_paths[pi].passed = false;
   for (size_t mi = 0, me = m_modules.size(); mi != me; ++mi)
      m_modules[mi].passed = false;
         
   // Update whether or not a given path / module passed selection.
   for (size_t pui = 0, pue = pathUpdates.size(); pui != pue; ++pui)
   {
      PathUpdate &update = pathUpdates[pui];
      std::map<std::string, size_t>::const_iterator index = m_pathIndex.find(update.pathName);
      if (index == m_pathIndex.end())
      {
         fwLog(fwlog::kError) << "Path " << update.pathName << "cannot be found!" << std::endl;
         continue;
      }
      PathInfo &pathInfo = m_paths[index->second];
      pathInfo.passed = update.passed;
            
      for (size_t mi = pathInfo.moduleStart, me = pathInfo.moduleEnd; mi != me; ++mi)
      {
         ModuleInfo &moduleInfo = m_modules[mi];
         moduleInfo.passed = update.passed || ((mi-pathInfo.moduleStart) < update.choiceMaker);
      }
   }

   implSort(-1, true);
}

//==============================================================================
//==============================================================================
//=============== CELL EDITOR ACTIONS ==========================================
//==============================================================================
//==============================================================================

void FWPSetTableManager::setCellValueEditor(FWPSetCellEditor *editor)
{
   m_editor = editor;
   m_renderer.setCellEditor(m_editor);
}


void FWPSetTableManager::cancelEditor()
{
   if (!m_editor)
      return;
     
   //  printf("FWPSetTableManager::cancelEditor() \n");  
   setSelection(-1, -1, 0);
   m_editor->UnmapWindow();      
}

bool FWPSetTableManager::applyEditor()
{
   if (!m_editor)
      return false;
         
   if (m_selectedRow == -1 ||m_selectedColumn != 1 )
      return false;

         
   //  printf("FWPSetTableManager::applyEditor() \n"); 
   PSetData &data = m_entries[m_row_to_index[m_selectedRow]];
   PSetData &parent = m_entries[data.parent];
   bool success = false;
   try
   {
      success = m_editor->apply(data, parent);

      if (success)
      {
         data.value = m_editor->GetText();
         m_modules[data.module].dirty = true;
         setSelection(-1, -1, 0); 
         m_editor->UnmapWindow();
     // ???
     // copy current to orig
      }
      else
      {
    // ???
    // set current from orig? reimport module ... hmmh, hard.
      }
   }
   catch(cms::Exception &e)
   {
      m_editor->SetForegroundColor(gVirtualX->GetPixel(kRed));
   }
   return success;
}


//==============================================================================
//==============================================================================
//========  TABLE UI MNG (virutals FWTableManagerBase virtuals, etc.)   =========
//==============================================================================
//==============================================================================
const std::string FWPSetTableManager::title() const {
   return "Modules & their parameters";
}

std::vector<std::string> FWPSetTableManager::getTitles() const 
{
   std::vector<std::string> returnValue;
   returnValue.reserve(numberOfColumns());
   returnValue.push_back("Label");
   returnValue.push_back("Value");
   return returnValue;
}

int FWPSetTableManager::selectedRow() const {
   return m_selectedRow;
}

int FWPSetTableManager::selectedColumn() const {
   return m_selectedColumn;
}

bool FWPSetTableManager::rowIsSelected(int row) const 
{
   return m_selectedRow == row;
}

int FWPSetTableManager::unsortedRowNumber(int unsorted) const
{
   return unsorted;
}

int FWPSetTableManager::numberOfRows() const {
   return m_row_to_index.size();
}

int FWPSetTableManager::numberOfColumns() const {
   return 2;
}

void FWPSetTableManager::setSelection (int iRow, int iColumn, int mask) 
{     
   // printf("set selection %d %d mode %d\n", iRow, iColumn, mask);
  
   // Nothing changes if we clicked selected
   // twice the same cell.
   if (iRow == m_selectedRow && iColumn == m_selectedColumn)
      return;

   // Otherwise update the selection information
   // and notify observers.
   m_selectedRow = iRow;
   m_selectedColumn = iColumn;
   if (iColumn == 1 && iRow > 0 )
   {
      int unsortedRow =  m_row_to_index[iRow];
      const PSetData& data = m_entries[unsortedRow];
      if (m_editor && data.editable) {
         m_editor->MoveResize(0, cellHeight()*iRow, m_editor->GetWidth() , m_editor->GetHeight());
         m_editor->MapWindow();
         m_editor->SetText(data.value.c_str());
         m_editor->SetFocus();
         m_editor->SetCursorPosition(data.value.size()-1);
      }
   }
   else
   {
      if (m_editor) m_editor->UnmapWindow();
   }
   visualPropertiesChanged();
}
  
std::vector<unsigned int> FWPSetTableManager::maxWidthForColumns() const 
{
   std::vector<unsigned int> ww = FWTableManagerBase::maxWidthForColumns();
   if (ww.size() > 1 && ww[1] > 0) 
   {
      // printf("dim W %d \n",ww[1]);
      // printf("dim H %d \n",cellHeight());
      if (m_editor)
         m_editor->MoveResize(m_editor->GetX(),m_editor->GetY(),  ww[1], cellHeight());
   }
   return ww;

}

void FWPSetTableManager::implSort(int, bool)
{
}
//______________________________________________________________________________

void FWPSetTableManager::setExpanded(int row)
{
   if (row == -1)
      return;

   int index = rowToIndex()[row];
   PSetData& data = m_entries[index];

   if (m_filter.empty() == false && data.childMatches == false)
      return;

   if (m_filter.empty())
      data.expandedUser = !data.expandedUser;
   else
      data.expandedFilter = !data.expandedFilter;

   recalculateVisibility();
   dataChanged();
   visualPropertiesChanged();
}

//______________________________________________________________________________

FWTableCellRendererBase* FWPSetTableManager::cellRenderer(int iSortedRowNumber, int iCol) const
{
   const static size_t maxSize = 512; // maximum string length

   static TGGC boldGC(fireworks::boldGC()); 
   static TGGC italicGC(fireworks::italicGC()); 
   static TGGC defaultGC(FWTextTableCellRenderer::getDefaultGC()); 
   
   const static Pixel_t gray  = 0x777777;
   const static Pixel_t red   = gVirtualX->GetPixel(kRed-5);
   const static Pixel_t green = gVirtualX->GetPixel(kGreen-5);

   // return in case if nothing maches filter
   if (static_cast<int>(m_row_to_index.size()) <= iSortedRowNumber)
   {
      m_renderer.setData(std::string(), false);
      return &m_renderer;
   }


   int unsortedRow =  m_row_to_index[iSortedRowNumber];
   const PSetData& data = m_entries[unsortedRow];

   std::string value;
   std::string label;
   TGGC* gc = 0;
   if (data.level == 0)
   {
      const PathInfo &path = m_paths[data.path];
      label = data.label + " (" + data.value + ")";
      gc = &boldGC;
      gc->SetForeground(path.passed ? green: red);
   }
   else if (data.level == 1)
   { 
      // "passed" means if module made decision on path 
      const ModuleInfo &module = m_modules[m_paths[data.path].moduleStart + data.module];
      label = data.label + " (" + data.value + ")";
      gc = (TGGC*)&boldGC;
      gc->SetForeground(module.passed ? green : red);
   }
   else
   {
      if (data.type > 0)
         label = data.label + " (" + sTypeTranslations.table_[data.type] + ")";
      else
         label = data.label;
      value = data.value;
         
      if (data.editable)
      {
         gc = &defaultGC;
      }
      else
      {
         gc = &italicGC;
         gc->SetForeground(gray);
      }
   }

   // check string size and cut it if necessary (problems with X11)
   if (iCol == 1 && value.size() >= maxSize)
   { 
      if (iSortedRowNumber == m_selectedRow)
         fwLog(fwlog::kWarning) << "label: " << label << " has too long value " << value << std::endl << std::endl;  

      value = value.substr(0, maxSize);
      value += "[truncated]";
      gc->SetForeground(gVirtualX->GetPixel(kMagenta));
   }

   // debug
   // label = Form("%s m[%d] childm[%d] ", label.c_str(), data.matches, data.childMatches);

   // set text attributes
   m_renderer.setGraphicsContext(gc);
   bool selected = data.matches && (m_filter.empty() == false);
   m_renderer.setData(iCol ?  value : label, selected);

   // set  tree attributes
   bool isParent = false;
   bool isOpen = false;
   int indent = 0;
   if (iCol == 0)
   { 
      if (m_filter.empty())
      {
         size_t nextIdx =  unsortedRow + 1;
         isParent = (nextIdx < m_entries.size() &&  m_entries[nextIdx].parent == (size_t)unsortedRow);
         isOpen = data.expandedUser;
      }
      else 
      {
         isParent = data.childMatches;
         isOpen = data.expandedFilter && data.childMatches;
      }

      indent =  data.level * 10 ;
      if (!isParent) indent += FWTextTreeCellRenderer::iconWidth();
   }
   m_renderer.setIsParent(isParent);
   m_renderer.setIsOpen(isOpen);
   m_renderer.setIndentation(indent);

   
   // If we are rendering the selected cell,
   // we show the editor.
   bool showEdit =  (iCol == 1 && iSortedRowNumber == m_selectedRow && iCol == m_selectedColumn && value.size() < maxSize);
   m_renderer.showEditor(data.editable && showEdit);

   return &m_renderer;
} // cellRender()

//______________________________________________________________________________

void FWPSetTableManager::updateFilter(const char *filter)
{
   m_filter = filter;

   if (m_filter.empty())
   { 
      // collapse entries when filter is removed
      for (size_t i = 0, e = m_entries.size(); i != e; ++i)
         m_entries[i].expandedFilter = false;
   }
   else
   {
      // Decide whether or not items match the filter.
      for (size_t i = 0, e = m_entries.size(); i != e; ++i)
      {
         PSetData &data = m_entries[i];

         // First of all decide whether or not we match
         // the filter.
         if (strstr(data.label.c_str(), m_filter.c_str()) || strstr(data.value.c_str(), m_filter.c_str()) )
            data.matches = true;
         else
            data.matches = false;
      }

      // We reset whether or not a given parent has children that match the
      // filter, and we recompute the whole information by checking all the
      // children.
      for (size_t i = 0, e = m_entries.size(); i != e; ++i)
         m_entries[i].childMatches = false;

      std::vector<int> stack;
      int previousLevel = 0;
      for (size_t i = 0, e = m_entries.size(); i != e; ++i)
      {
         PSetData &data = m_entries[i];
         // Top level.
         if (data.parent == (size_t)-1)
         {
            previousLevel = 0;
            // std::cout << "reset stack for top level " << data.label << std::endl;
            stack.clear();
            continue;
         }
         // If the level is greater than the previous one,
         // it means we are among the children of the 
         // previous level, hence we push the parent to
         // the stack.
         // If the level is not greater than the previous
         // one it means we have popped out n levels of
         // parents, where N is the difference between the 
         // new and the old level. In this case we
         // pop up N parents from the stack.
         if (data.level > previousLevel)
            stack.push_back(data.parent);
         else
            for (size_t pi = 0, pe = previousLevel - data.level; pi != pe; ++pi)
               stack.pop_back();
 
         if (data.matches && m_entries[stack.back()].childMatches == false)
         {
            //  printf("match for %s with level %d\n",data.label.c_str(), data.level );
            for (size_t pi = 0, pe = stack.size(); pi != pe; ++pi)
            {
               //    printf("set child match to parent %s with level %d \n",m_entries[stack[pi]].label.c_str(), m_entries[stack[pi]].level);
               m_entries[stack[pi]].childMatches = true;
               
            }
         }

         previousLevel = data.level;
      }
   
      // expand to matching children
      for (size_t i = 0, e = m_entries.size(); i != e; ++i)
         m_entries[i].expandedFilter = m_entries[i].childMatches;

   }
 
   recalculateVisibility();

   dataChanged();
} // updateFilter()

//______________________________________________________________________________

void FWPSetTableManager::recalculateVisibility()
{
   m_row_to_index.clear();

   // Decide about visibility.
   // * If the items are toplevel and they match the filter, they get shown
   //   in any case.
   // * If the item or any of its children match the filter, the item
   //   is visible.
   // * If the filter is empty and the parent is expanded.
   for (size_t i = 0, e = m_entries.size(); i != e; ++i)
   { 
      PSetData &data = m_entries[i];
      if (data.parent == ((size_t) -1))
      {
         data.visible = data.childMatches || data.matches || m_filter.empty();
      }
      else
      {
         if (m_filter.empty())
         {
            data.visible = m_entries[data.parent].expandedUser && m_entries[data.parent].visible;
         }
         else
         {
            if (data.level < 2)
               data.visible = m_entries[data.parent].expandedFilter && m_entries[data.parent].visible && (data.matches || data.childMatches);
            else
               data.visible = m_entries[data.parent].expandedFilter && m_entries[data.parent].visible;
         }
      }
   }

   // Put in the index only the entries which are visible.
   for (size_t i = 0, e = m_entries.size(); i != e; ++i)
      if (m_entries[i].visible)
         m_row_to_index.push_back(i);
}