Struct gtk4::SliceListModel

pub struct SliceListModel { /* private fields */ }

SliceListModel is a list model that presents a slice of another model.

This is useful when implementing paging by setting the size to the number of elements per page and updating the offset whenever a different page is opened.

SliceListModel passes through sections from the underlying model.

Properties

item-type

The type of items. See [ListModelExtManual::item_type()][crate::gio::prelude::ListModelExtManual::item_type()].

Readable

model

Child model to take slice from.

Readable | Writeable

n-items

The number of items. See [ListModelExtManual::n_items()][crate::gio::prelude::ListModelExtManual::n_items()].

Readable

offset

Offset of slice.

Readable | Writeable

size

Maximum size of slice.

Readable | Writeable

Implements

[trait@glib::ObjectExt], gio::prelude::ListModelExt, SectionModelExt

Implementations

impl SliceListModel

pub fn new( model: Option<impl IsA<ListModel>>, offset: u32, size: u32 ) -> SliceListModel

Creates a new slice model.

It presents the slice from @offset to offset + @size of the given @model.

model

The model to use

offset

the offset of the slice

size

maximum size of the slice

Returns

A new SliceListModel

pub fn builder() -> SliceListModelBuilder

Creates a new builder-pattern struct instance to construct SliceListModel objects.

This method returns an instance of SliceListModelBuilder which can be used to create SliceListModel objects.

pub fn model(&self) -> Option<ListModel>

Gets the model that is currently being used or None if none.

Returns

The model in use

pub fn offset(&self) -> u32

Gets the offset set via gtk_slice_list_model_set_offset().

Returns

The offset

pub fn size(&self) -> u32

Gets the size set via gtk_slice_list_model_set_size().

Returns

The size

pub fn set_model(&self, model: Option<&impl IsA<ListModel>>)

Sets the model to show a slice of.

The model’s item type must conform to @self’s item type.

model

The model to be sliced

pub fn set_offset(&self, offset: u32)

Sets the offset into the original model for this slice.

If the offset is too large for the sliced model, @self will end up empty.

offset

the new offset to use

pub fn set_size(&self, size: u32)

Sets the maximum size. @self will never have more items than @size.

It can however have fewer items if the offset is too large or the model sliced from doesn’t have enough items.

size

the maximum size

pub fn connect_model_notify<F: Fn(&Self) + 'static>( &self, f: F ) -> SignalHandlerId

pub fn connect_offset_notify<F: Fn(&Self) + 'static>( &self, f: F ) -> SignalHandlerId

pub fn connect_size_notify<F: Fn(&Self) + 'static>( &self, f: F ) -> SignalHandlerId

Trait Implementations

impl Clone for SliceListModel

fn clone(&self) -> Self

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SliceListModel

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for SliceListModel

fn default() -> Self

Returns the “default value” for a type.

impl HasParamSpec for SliceListModel

type ParamSpec = ParamSpecObject

type SetValue = SliceListModel

Preferred value to be used as setter for the associated ParamSpec.

type BuilderFn = fn(_: &str) -> ParamSpecObjectBuilder<'_, SliceListModel>

fn param_spec_builder() -> Self::BuilderFn

impl Hash for SliceListModel

fn hash<H>(&self, state: &mut H)

where H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for SliceListModel

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized + PartialOrd,

Restrict a value to a certain interval.

impl ParentClassIs for SliceListModel

type Parent = Object

impl<OT: ObjectType> PartialEq<OT> for SliceListModel

fn eq(&self, other: &OT) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<OT: ObjectType> PartialOrd<OT> for SliceListModel

fn partial_cmp(&self, other: &OT) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl StaticType for SliceListModel

fn static_type() -> Type

Returns the type identifier of Self.

impl Eq for SliceListModel

impl IsA<ListModel> for SliceListModel

impl IsA<SectionModel> for SliceListModel