SliceListModel

class SliceListModel(**properties: Any)

Superclasses: Object

Implemented Interfaces: ListModel, SectionModel

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.

GtkSliceListModel passes through sections from the underlying model.

Constructors

class SliceListModel

classmethod new(model: ListModel | None, offset: int, size: int) → SliceListModel

Creates a new slice model.

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

Parameters:

• model – The model to use

• offset – the offset of the slice

• size – maximum size of the slice

Methods

class SliceListModel

get_model() → ListModel | None

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

get_offset() → int

Gets the offset set via set_offset().

get_size() → int

Gets the size set via set_size().

set_model(model: ListModel | None = None) → None

Sets the model to show a slice of.

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

Parameters:

model – The model to be sliced

set_offset(offset: int) → None

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.

Parameters:

offset – the new offset to use

set_size(size: int) → None

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.

Parameters:

size – the maximum size

Properties

class SliceListModel

props.item_type: GType

The type of items. See get_item_type.

Added in version 4.8.

props.model: ListModel

Child model to take slice from.

props.n_items: int

The number of items. See get_n_items.

Added in version 4.8.

props.offset: int

Offset of slice.

props.size: int

Maximum size of slice.