pub struct SectionModel { /* private fields */ }
v4_12
only.Expand description
SectionModel
is an interface that adds support for sections to list models.
A SectionModel
groups successive items into so-called sections. List widgets
like ListView
and GridView
then allow displaying section headers for
these sections by installing a header factory.
Many GTK list models support sections inherently, or they pass through the sections of a model they are wrapping.
When the section groupings of a model change, the model will emit the
sections-changed
signal by calling the
SectionModelExt::sections_changed()
function. All sections in the given range
then need to be queried again.
The items-changed
signal has the same effect, all sections in
that range are invalidated, too.
§Signals
§sections-changed
Emitted when the start-of-section state of some of the items in @model changes.
Note that this signal does not specify the new section state of the items, they need to be queried manually. It is also not necessary for a model to change the section state of any of the items in the section model, though it would be rather useless to emit such a signal.
The items-changed
implies the effect of the
sections-changed
signal for all the items
it covers.
ListModel
§items-changed
This signal is emitted whenever items were added to or removed from @list. At @position, @removed items were removed and @added items were added in their place.
Note: If removed != added
, the positions of all later items
in the model change.
§Implements
SectionModelExt
, gio::prelude::ListModelExt
GLib type: GObject with reference counted clone semantics.
Implementations§
source§impl SectionModel
impl SectionModel
pub const NONE: Option<&'static SectionModel> = None
Trait Implementations§
source§impl Clone for SectionModel
impl Clone for SectionModel
source§impl Debug for SectionModel
impl Debug for SectionModel
source§impl HasParamSpec for SectionModel
impl HasParamSpec for SectionModel
type ParamSpec = ParamSpecObject
source§type SetValue = SectionModel
type SetValue = SectionModel
type BuilderFn = fn(_: &str) -> ParamSpecObjectBuilder<'_, SectionModel>
fn param_spec_builder() -> Self::BuilderFn
source§impl Hash for SectionModel
impl Hash for SectionModel
source§impl<T: SectionModelImpl> IsImplementable<T> for SectionModel
impl<T: SectionModelImpl> IsImplementable<T> for SectionModel
source§fn interface_init(iface: &mut Interface<Self>)
fn interface_init(iface: &mut Interface<Self>)
source§fn instance_init(_instance: &mut InitializingObject<T>)
fn instance_init(_instance: &mut InitializingObject<T>)
source§impl Ord for SectionModel
impl Ord for SectionModel
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<OT: ObjectType> PartialEq<OT> for SectionModel
impl<OT: ObjectType> PartialEq<OT> for SectionModel
source§impl<OT: ObjectType> PartialOrd<OT> for SectionModel
impl<OT: ObjectType> PartialOrd<OT> for SectionModel
source§impl StaticType for SectionModel
impl StaticType for SectionModel
source§fn static_type() -> Type
fn static_type() -> Type
Self
.impl Eq for SectionModel
impl IsA<ListModel> for SectionModel
impl IsA<SectionModel> for FilterListModel
impl IsA<SectionModel> for FlattenListModel
impl IsA<SectionModel> for MapListModel
impl IsA<SectionModel> for MultiSelection
impl IsA<SectionModel> for NoSelection
impl IsA<SectionModel> for SingleSelection
impl IsA<SectionModel> for SliceListModel
impl IsA<SectionModel> for SortListModel
Auto Trait Implementations§
impl Freeze for SectionModel
impl RefUnwindSafe for SectionModel
impl !Send for SectionModel
impl !Sync for SectionModel
impl Unpin for SectionModel
impl UnwindSafe for SectionModel
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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.