How do you set an enum property on a GLib object?

Question

I am trying to set the \"ellipsize\" enum property on a GtkCellRendererText object.

I am trying to use g_object_set_property as follows:

Gtk         


        

Answer 1

Using g_object_set instead works:

g_object_set (G_OBJECT(renderer), "ellipsize", PANGO_ELLIPSIZE_END, NULL);

Answer 2

You need to initialise the GValue container with the type of the enumeration that the property expects. G_TYPE_ENUM is the generic, abstract enumeration type.

The "ellipsize" property of GtkCellRendererText expects a PangoEllipsizeMode enumeration value, which has a GType of PANGO_TYPE_ELLIPSIZE_MODE.

GtkCellRenderer *renderer = gtk_cell_renderer_text_new ();

GValue val = G_VALUE_INIT;

g_value_init (&val, PANGO_TYPE_ELLIPSIZE_MODE);
g_value_set_enum (&val, PANGO_ELLIPSIZE_END);

g_object_set_property (G_OBJECT(renderer), "ellipsize", &val);

// Always unset your value to release any memory that may be associated with it
g_value_unset (&val);