MapListModel

Object Hierarchy:

Description:

[ CCode ( type_id = "gtk_map_list_model_get_type ()" ) ]
public sealed class MapListModel : Object, ListModel, SectionModel

A `GtkMapListModel` maps the items in a list model to different items.

`GtkMapListModel` uses a [callback@Gtk.MapListModelMapFunc].

Example: Create a list of `GtkEventControllers` ```c static gpointer map_to_controllers (gpointer widget, gpointer data) { gpointer result = gtk_widget_observe_controllers (widget); g_object_unref (widget); return result; }

widgets = gtk_widget_observe_children (widget);

controllers = gtk_map_list_model_new (widgets, map_to_controllers, NULL, NULL);

model = gtk_flatten_list_model_new (GTK_TYPE_EVENT_CONTROLLER, controllers); ```

`GtkMapListModel` will attempt to discard the mapped objects as soon as they are no longer needed and recreate them if necessary.

`GtkMapListModel` passes through sections from the underlying model.

Namespace: Gtk

Package: gtk4

Content:

Properties:

public bool has_map { get; }
If a map is set for this model
public Type item_type { get; }
The type of items.
public ListModel model { get; construct; }
The model being mapped.
public uint n_items { get; }
The number of items.

Creation methods:

public MapListModel (owned ListModel? model, owned MapListModelMapFunc? map_func)
Creates a new `GtkMapListModel` for the given arguments.

Methods:

public unowned ListModel? get_model ()
Gets the model that is currently being mapped or null if none.
public void set_map_func (owned MapListModelMapFunc? map_func)
Sets the function used to map items.
public void set_model (ListModel? model)
Sets the model to be mapped.

Inherited Members:

All known members inherited from class GLib.Object

All known members inherited from interface GLib.ListModel

items_changed

All known members inherited from interface Gtk.SectionModel

get_section

sections_changed