Wt

Once you specify the width of a colum in a WTreeView or WTableView it is not possible to use a empty model because this will trigger a application crash inside the WStandardItemModel.

In my attached example with the lines you see below it will crash. If the lines are commented everything works.

tv->setColumnWidth(0, Wt::WLength(240));
...
trv->setColumnWidth(0, Wt::WLength(240));

I changed two methods inside the WStandardItemModel to fix this issue but I am not Sure if this is sufficient/a complete solution. Maybe I am wrong to customize a view like this but I thought it should work like this. Please correct me if I am doing something completely wrong here ;)

boost::any WStandardItemModel::headerData(int section, Orientation orientation,
                      int role) const
{
  if (role == LevelRole)
    return 0;

  std::vector<HeaderData> header
  = (orientation == Horizontal) ? columnHeaderData_ : rowHeaderData_;

  if(header.size() <= section)
      return boost::any();

  const HeaderData& d = header[section];

  HeaderData::const_iterator i = d.find(role);

  if (i != d.end()) {
    /*
     * Work around CLang bug, 'return i->second' would try to create
     * a boost::any<const boost::any> ... ?
     */
    boost::any result = i->second;
    return result;
  } else
    return boost::any();
}

WFlags<HeaderFlag> WStandardItemModel::headerFlags(int section,
                           Orientation orientation)
  const
{
  const std::vector<WFlags<HeaderFlag> >& fl
    = (orientation == Horizontal) ? columnHeaderFlags_ : rowHeaderFlags_;

  if(fl.size() > section)
    return fl[section];
  else
    return WFlags<HeaderFlag>();
}

I attached my changed version of the WStandardItemModel based on the current git.

Best Regards

Florian