class Gtk::ListItem

Overview

Gtk::ListItem is used by list widgets to represent items in a GListModel.

The Gtk::ListItems are managed by the list widget (with its factory) and cannot be created by applications, but they need to be populated by application code. This is done by calling Gtk::ListItem#child=.

Gtk::ListItems exist in 2 stages:

  1. The unbound stage where the listitem is not currently connected to an item in the list. In that case, the Gtk::ListItem#item property is set to nil.

  2. The bound stage where the listitem references an item from the list. The Gtk::ListItem#item property is not nil.

Defined in:

lib/gi-crystal/src/auto/gtk-4.0/list_item.cr

Constructors

Class Method Summary

Instance Method Summary

Instance methods inherited from class GObject::Object

bind_property(source_property : String, target : GObject::Object, target_property : String, flags : GObject::BindingFlags) : GObject::Binding bind_property, bind_property_full(source_property : String, target : GObject::Object, target_property : String, flags : GObject::BindingFlags, transform_to : GObject::Closure, transform_from : GObject::Closure) : GObject::Binding bind_property_full, data(key : String) : Pointer(Void)? data, finalize finalize, freeze_notify : Nil freeze_notify, getv(names : Enumerable(String), values : Enumerable(_)) : Nil getv, notify(property_name : String) : Nil notify, notify_by_pspec(pspec : GObject::ParamSpec) : Nil notify_by_pspec, notify_signal notify_signal, property(property_name : String, value : _) : Nil property, qdata(quark : UInt32) : Pointer(Void)? qdata, ref_count : UInt32 ref_count, run_dispose : Nil run_dispose, set_data(key : String, data : Pointer(Void)?) : Nil set_data, set_property(property_name : String, value : _) : Nil set_property, steal_data(key : String) : Pointer(Void)? steal_data, steal_qdata(quark : UInt32) : Pointer(Void)? steal_qdata, thaw_notify : Nil thaw_notify, to_unsafe : Pointer(Void) to_unsafe, watch_closure(closure : GObject::Closure) : Nil watch_closure

Constructor methods inherited from class GObject::Object

cast(obj : GObject::Object) : self cast, cast?(obj : GObject::Object) : self? cast?, new(pointer : Pointer(Void), transfer : GICrystal::Transfer)
new new, newv(object_type : UInt64, parameters : Enumerable(GObject::Parameter)) : self newv

Class methods inherited from class GObject::Object

compat_control(what : UInt64, data : Pointer(Void)?) : UInt64 compat_control, g_type : UInt64 g_type, interface_find_property(g_iface : GObject::TypeInterface, property_name : String) : GObject::ParamSpec interface_find_property, interface_list_properties(g_iface : GObject::TypeInterface) : Enumerable(GObject::ParamSpec) interface_list_properties

Constructor Detail

def self.new #

Initialize a new ListItem.


def self.new(*, activatable : Bool? = nil, child : Gtk::Widget? = nil, item : GObject::Object? = nil, position : UInt32? = nil, selectable : Bool? = nil, selected : Bool? = nil) #

Class Method Detail

def self.g_type : UInt64 #

Returns the type id (GType) registered in GLib type system.


Instance Method Detail

def activatable : Bool #

Checks if a list item has been set to be activatable via gtk_list_item_set_activatable().


def activatable=(activatable : Bool) : Nil #

Sets @self to be activatable.

If an item is activatable, double-clicking on the item, using the Return key or calling gtk_widget_activate() will activate the item. Activating instructs the containing view to handle activation. Gtk::ListView for example will be emitting the Gtk::ListView::#activate signal.

By default, list items are activatable.


def activatable? : Bool #

def child : Gtk::Widget? #

Gets the child previously set via gtk_list_item_set_child() or nil if none was set.


def child=(child : Gtk::Widget?) : Nil #

Sets the child to be used for this listitem.

This function is typically called by applications when setting up a listitem so that the widget can be reused when binding it multiple times.


def item : GObject::Object? #

Gets the model item that associated with @self.

If @self is unbound, this function returns nil.


def position : UInt32 #

Gets the position in the model that @self currently displays.

If @self is unbound, %GTK_INVALID_LIST_POSITION is returned.


def selectable : Bool #

Checks if a list item has been set to be selectable via gtk_list_item_set_selectable().

Do not confuse this function with Gtk::ListItem#selected.


def selectable=(selectable : Bool) : Nil #

Sets @self to be selectable.

If an item is selectable, clicking on the item or using the keyboard will try to select or unselect the item. If this succeeds is up to the model to determine, as it is managing the selected state.

Note that this means that making an item non-selectable has no influence on the selected state at all. A non-selectable item may still be selected.

By default, list items are selectable. When rebinding them to a new item, they will also be reset to be selectable by GTK.


def selectable? : Bool #

def selected : Bool #

Checks if the item is displayed as selected.

The selected state is maintained by the liste widget and its model and cannot be set otherwise.


def selected? : Bool #