GimpDrawableConstraintFunc ()

gboolean    (*GimpDrawableConstraintFunc)   (gint32 image_id,
                                             gint32 drawable_id,
                                             gpointer data);

gimp_drawable_combo_box_new ()

GtkWidget*  gimp_drawable_combo_box_new     (GimpDrawableConstraintFunc constraint,
                                             gpointer data);

Creates a new GimpIntComboBox filled with all currently opened drawables. If a constraint function is specified, it is called for each drawable and only if the function returns TRUE, the drawable is added to the combobox.

You should use gimp_int_combo_box_connect() to initialize and connect the combo. Use gimp_int_combo_box_set_active() to get the active drawable ID and gimp_int_combo_box_get_active() to retrieve the ID of the selected drawable.

Since GIMP 2.2

gimp_channel_combo_box_new ()

GtkWidget*  gimp_channel_combo_box_new      (GimpDrawableConstraintFunc constraint,
                                             gpointer data);

Creates a new GimpIntComboBox filled with all currently opened channels. See gimp_drawable_combo_box() for more info.

Since GIMP 2.2

gimp_layer_combo_box_new ()

GtkWidget*  gimp_layer_combo_box_new        (GimpDrawableConstraintFunc constraint,
                                             gpointer data);

Creates a new GimpIntComboBox filled with all currently opened layers. See gimp_drawable_combo_box() for more info.

Since GIMP 2.2