begin_changeset

Notify listeners that the model is about to be changed, which means that multiple row additions / changes / removals will follow.

The default implementation of this method will emit the changeset_started signal.

It is not stricly necessary to enclose every change to a model in a begin_changeset and end_changeset calls, but doing so is highly recommended and allows implementing various optimizations.

The usual way to perform multiple changes to a model is as follows:

void update_model (DeeModel *model)
{
  GVariant **added_row_data1 = ...;
  GVariant **added_row_data2 = ...;

  dee_model_begin_changeset (model);

  dee_model_remove (model, dee_model_get_first_iter (model));
  dee_model_append_row (model, added_row_data1);
  dee_model_append_row (model, added_row_data2);

  dee_model_end_changeset (model);
}

Parameters:

this

a Model