Wt

Hi! I'm updating a WStandardItemModel with about 270 values every 50 ms. After about 24 hours the application stopps and the browser opens a message box that says: "Wt internal error: Unexpected token: '-'"

I'm asking myself if I'm using the WStandardItemModel correct or if I'm doing something wrong.

It would be great to get a little bit support or a good example from github.

Test environment: wt-4.1.1, lastest chrome, 8 browser windows

The following lines explain my method:

• The Server::run() updates each session by calling Wt::WServer::instance()->post(...), this calls ClientWidget::updateData()
• The ClientWidget::updateData() gets the data from Server::instance(), updates the WStandardItemModel and calls triggerUpdate()

These two steps work fine, if I just update a Wtext on the widget.

The following steps are done to handle the model:

Init model:

void initModel(const std::vector<std::string>& header)
{
  model->insertColumns(model->columnCount(), header.size());

  auto colCount = 0;
  for(auto& head : header) {
    model->setHeaderData(colCount++, Wt::WString(head));
  }

  for(int row = 0; row < model->rowCount(); ++row) {
    for(int col = 0; col < model->columnCount(); ++col) {
      model->item(row, col)->setFlags(Wt::ItemFlag::Selectable);
    }
  }
}

Insert new rows to the model:

  auto valueIdItem = std::make_unique<Wt::WStandardItem>(data.getId());
  auto valueNameItem = std::make_unique<Wt::WStandardItem>(data.getName());
  auto valueDataItem = std::make_unique<Wt::WStandardItem>("0");

  idToRow[data.getId()] = rowMaxCounter++; // just something to map internal IDs an the row
  std::vector<std::unique_ptr<Wt::WStandardItem> > v;
  v.push_back(std::move(valueIdItem));
  v.push_back(std::move(valueNameItem));
  v.push_back(std::move(valueDataItem));

  model->insertRow(idToRow[data.getId()], std::move(v));

Update model data:

  model->setData(rowId, 2, data.getValue(), Wt::ItemDataRole::Display); // data.getValue() returns a std::string with new content