Method

GtkTreeModelFilterset_visible_func

Declaration [src]

void
gtk_tree_model_filter_set_visible_func (
  GtkTreeModelFilter* filter,
  GtkTreeModelFilterVisibleFunc func,
  gpointer data,
  GDestroyNotify destroy
)

Description [src]

Sets the visible function used when filtering the filter to be func. The function should return TRUE if the given row should be visible and FALSE otherwise.

If the condition calculated by the function changes over time (e.g. because it depends on some global parameters), you must call gtk_tree_model_filter_refilter() to keep the visibility information of the model up-to-date.

Note that func is called whenever a row is inserted, when it may still be empty. The visible function should therefore take special care of empty rows, like in the example below.

static gboolean
visible_func (GtkTreeModel *model,
              GtkTreeIter  *iter,
              gpointer      data)
{
  // Visible if row is non-empty and first column is “HI”
  gchar *str;
  gboolean visible = FALSE;

  gtk_tree_model_get (model, iter, 0, &str, -1);
  if (str && strcmp (str, "HI") == 0)
    visible = TRUE;
  g_free (str);

  return visible;
}

Note that gtk_tree_model_filter_set_visible_func() or gtk_tree_model_filter_set_visible_column() can only be called once for a given filter model.

Available since:2.4

Parameters

func

Type: GtkTreeModelFilterVisibleFunc

A GtkTreeModelFilterVisibleFunc, the visible function.

data

Type: gpointer

User data to pass to the visible function, or NULL.

The argument can be NULL.
The data is owned by the caller of the function.
destroy

Type: GDestroyNotify

Destroy notifier of data, or NULL.

The argument can be NULL.