textual.layout

DockArrangeResult dataclass

DockArrangeResult(
    placements, widgets, scroll_spacing, _spatial_map=None
)

Result of Layout.arrange.

placements instance-attribute

placements

A WidgetPlacement for every widget to describe its location on screen.

scroll_spacing instance-attribute

scroll_spacing

Spacing to reduce scrollable area.

spatial_map property

spatial_map

A lazy-calculated spatial map.

total_region property

total_region

The total area occupied by the arrangement.

Returns:

Type	Description
Region	A Region.

widgets instance-attribute

widgets

A set of widgets in the arrangement.

get_visible_placements

get_visible_placements(region)

Get the placements visible within the given region.

Parameters:

Name	Type	Description	Default
region	Region	A region.	required

Returns:

Type	Description
list[WidgetPlacement]	Set of placements.

Layout

Bases: ABC

Base class of the object responsible for arranging Widgets within a container.

arrange abstractmethod

arrange(parent, children, size)

Generate a layout map that defines where on the screen the widgets will be drawn.

Parameters:

Name	Type	Description	Default
parent	Widget	Parent widget.	required
size	Size	Size of container.	required

Returns:

Type	Description
ArrangeResult	An iterable of widget location

render_keyline

render_keyline(container)

Render keylines around all widgets.

Parameters:

Name	Type	Description	Default
container	Widget	The container widget.	required

Returns:

Type	Description
StripRenderable	A renderable to draw the keylines.

WidgetPlacement

Bases: NamedTuple

The position, size, and relative order of a widget within its parent.

get_bounds classmethod

get_bounds(placements)

Get a bounding region around all placements.

Parameters:

Name	Type	Description	Default
placements	Iterable[WidgetPlacement]	A number of placements.	required

Returns:

Type	Description
Region	An optimal binding box around all placements.

translate classmethod

translate(placements, offset)

Move all placements by a given offset.

Parameters:

Name	Type	Description	Default
placements	list[WidgetPlacement]	List of placements.	required
offset	Offset	Offset to add to placements.	required

Returns:

Type	Description
list[WidgetPlacement]	Placements with adjusted region, or same instance if offset is null.