pub struct MapListModel { /* private fields */ }
Expand description
A MapListModel
maps the items in a list model to different items.
MapListModel
uses a `callback::Gtk::MapListModelMapFunc.
Example: Create a list of GtkEventControllers
⚠️ The following code is in 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);
MapListModel
will attempt to discard the mapped objects as soon as
they are no longer needed and recreate them if necessary.
MapListModel
passes through sections from the underlying model.
§Properties
§has-map
If a map is set for this model
Readable
§item-type
The type of items. See [ListModelExtManual::item_type()
][crate::gio::prelude::ListModelExtManual::item_type()].
Readable
§model
The model being mapped.
Readable | Writeable | Construct Only
§n-items
The number of items. See [ListModelExtManual::n_items()
][crate::gio::prelude::ListModelExtManual::n_items()].
Readable
§Implements
[trait@glib::ObjectExt
], gio::prelude::ListModelExt
, SectionModelExt
GLib type: GObject with reference counted clone semantics.
Implementations§
source§impl MapListModel
impl MapListModel
sourcepub fn new<P: Fn(&Object) -> Object + 'static>(
model: Option<impl IsA<ListModel>>,
map_func: P,
) -> MapListModel
pub fn new<P: Fn(&Object) -> Object + 'static>( model: Option<impl IsA<ListModel>>, map_func: P, ) -> MapListModel
Creates a new MapListModel
for the given arguments.
§model
The model to map
§map_func
map function
§Returns
a new MapListModel
sourcepub fn set_map_func<P: Fn(&Object) -> Object + 'static>(&self, map_func: P)
pub fn set_map_func<P: Fn(&Object) -> Object + 'static>(&self, map_func: P)
Sets the function used to map items.
The function will be called whenever an item needs to be mapped and must return the item to use for the given input item.
Note that MapListModel
may call this function multiple times
on the same item, because it may delete items it doesn’t need anymore.
GTK makes no effort to ensure that @map_func conforms to the item type of @self. It assumes that the caller knows what they are doing and the map function returns items of the appropriate type.
§map_func
map function
sourcepub fn set_model(&self, model: Option<&impl IsA<ListModel>>)
pub fn set_model(&self, model: Option<&impl IsA<ListModel>>)
Sets the model to be mapped.
GTK makes no effort to ensure that @model conforms to the item type expected by the map function. It assumes that the caller knows what they are doing and have set up an appropriate map function.
§model
The model to be mapped
pub fn connect_has_map_notify<F: Fn(&Self) + 'static>( &self, f: F, ) -> SignalHandlerId
source§impl MapListModel
impl MapListModel
pub fn without_map_func(model: Option<&impl IsA<ListModel>>) -> Self
pub fn unset_map_func(&self)
Trait Implementations§
source§impl Clone for MapListModel
impl Clone for MapListModel
source§impl Debug for MapListModel
impl Debug for MapListModel
source§impl HasParamSpec for MapListModel
impl HasParamSpec for MapListModel
type ParamSpec = ParamSpecObject
source§type SetValue = MapListModel
type SetValue = MapListModel
type BuilderFn = fn(_: &str) -> ParamSpecObjectBuilder<'_, MapListModel>
fn param_spec_builder() -> Self::BuilderFn
source§impl Hash for MapListModel
impl Hash for MapListModel
source§impl Ord for MapListModel
impl Ord for MapListModel
source§fn cmp(&self, other: &Self) -> Ordering
fn cmp(&self, other: &Self) -> Ordering
Comparison for two GObjects.
Compares the memory addresses of the provided objects.
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
source§impl ParentClassIs for MapListModel
impl ParentClassIs for MapListModel
source§impl<OT: ObjectType> PartialEq<OT> for MapListModel
impl<OT: ObjectType> PartialEq<OT> for MapListModel
source§impl<OT: ObjectType> PartialOrd<OT> for MapListModel
impl<OT: ObjectType> PartialOrd<OT> for MapListModel
source§impl StaticType for MapListModel
impl StaticType for MapListModel
source§fn static_type() -> Type
fn static_type() -> Type
Self
.impl Eq for MapListModel
impl IsA<ListModel> for MapListModel
impl IsA<SectionModel> for MapListModel
Auto Trait Implementations§
impl Freeze for MapListModel
impl RefUnwindSafe for MapListModel
impl !Send for MapListModel
impl !Sync for MapListModel
impl Unpin for MapListModel
impl UnwindSafe for MapListModel
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args: &[Value],
) -> Option<Value>
fn emit_with_details_and_values( &self, signal_id: SignalId, details: Quark, args: &[Value], ) -> Option<Value>
source§fn disconnect(&self, handler_id: SignalHandlerId)
fn disconnect(&self, handler_id: SignalHandlerId)
source§fn connect_notify<F>(&self, name: Option<&str>, f: F) -> SignalHandlerId
fn connect_notify<F>(&self, name: Option<&str>, f: F) -> SignalHandlerId
notify
signal of the object. Read moresource§fn connect_notify_local<F>(&self, name: Option<&str>, f: F) -> SignalHandlerId
fn connect_notify_local<F>(&self, name: Option<&str>, f: F) -> SignalHandlerId
notify
signal of the object. Read moresource§unsafe fn connect_notify_unsafe<F>(
&self,
name: Option<&str>,
f: F,
) -> SignalHandlerId
unsafe fn connect_notify_unsafe<F>( &self, name: Option<&str>, f: F, ) -> SignalHandlerId
notify
signal of the object. Read moresource§fn notify(&self, property_name: &str)
fn notify(&self, property_name: &str)
source§fn notify_by_pspec(&self, pspec: &ParamSpec)
fn notify_by_pspec(&self, pspec: &ParamSpec)
source§fn add_weak_ref_notify<F>(&self, f: F) -> WeakRefNotify<T>
fn add_weak_ref_notify<F>(&self, f: F) -> WeakRefNotify<T>
source§fn add_weak_ref_notify_local<F>(&self, f: F) -> WeakRefNotify<T>where
F: FnOnce() + 'static,
fn add_weak_ref_notify_local<F>(&self, f: F) -> WeakRefNotify<T>where
F: FnOnce() + 'static,
source§fn bind_property<'a, 'f, 't, O>(
&'a self,
source_property: &'a str,
target: &'a O,
target_property: &'a str,
) -> BindingBuilder<'a, 'f, 't>where
O: ObjectType,
fn bind_property<'a, 'f, 't, O>(
&'a self,
source_property: &'a str,
target: &'a O,
target_property: &'a str,
) -> BindingBuilder<'a, 'f, 't>where
O: ObjectType,
source§unsafe fn run_dispose(&self)
unsafe fn run_dispose(&self)
source§impl<T> PropertyGet for Twhere
T: HasParamSpec,
impl<T> PropertyGet for Twhere
T: HasParamSpec,
source§impl<O> SectionModelExt for Owhere
O: IsA<SectionModel>,
impl<O> SectionModelExt for Owhere
O: IsA<SectionModel>,
source§fn section(&self, position: u32) -> (u32, u32)
fn section(&self, position: u32) -> (u32, u32)
v4_12
only.out_end - out_start
. Read moresource§fn sections_changed(&self, position: u32, n_items: u32)
fn sections_changed(&self, position: u32, n_items: u32)
v4_12
only.sections-changed
signal to notify about changes to sections. Read moresource§fn connect_sections_changed<F: Fn(&Self, u32, u32) + 'static>(
&self,
f: F,
) -> SignalHandlerId
fn connect_sections_changed<F: Fn(&Self, u32, u32) + 'static>( &self, f: F, ) -> SignalHandlerId
v4_12
only.