Method createUndoString

qucs/schematic_file.cpp:943–976

------------------------------------------------------------- Creates a Qucs file format (without document properties) in the returning string. This is used to save state for undo operation.

// Creates a Qucs file format (without document properties) in the returning
// string. This is used to save state for undo operation.
QString Schematic::createUndoString(char Op)
{
  Wire *pw;
  Diagram *pd;
  Painting *pp;
  Component *pc;

  // Build element document.
  QString s = "  \n";
  s.replace(0,1,Op);
  for(pc = DocComps.first(); pc != 0; pc = DocComps.next()) {
    QTextStream str(&s);
    saveComponent(str, pc);
    s += "\n";
  }
  s += "</>\n";  // short end flag

  for(pw = DocWires.first(); pw != 0; pw = DocWires.next())
    s += pw->save()+"\n";
  // save all labeled nodes as wires
  for(Node *pn = DocNodes.first(); pn != 0; pn = DocNodes.next())
    if(pn->Label) s += pn->Label->save()+"\n";
  s += "</>\n";

  for(pd = DocDiags.first(); pd != 0; pd = DocDiags.next())
    s += pd->save()+"\n";
  s += "</>\n";

  for(pp = DocPaints.first(); pp != 0; pp = DocPaints.next())
    s += "<"+pp->save()+">\n";
  s += "</>\n";

  return s;
}

// -------------------------------------------------------------
// Same as "createUndoString(char Op)" but for symbol edit mode.