PolygonLayer

PolygonLayer

Bases: MapLayer

A layer to display PolygonMarkers.

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Online docs: https://flet.dev/docs/controls/mappolygonlayer

draw_labels_last: bool = False

Whether to draw labels last and thus over all the polygons.

Defaults to False.

polygon_culling: bool = True

Whether to cull polygons and polygon sections that are outside of the viewport.

Defaults to True.

polygon_labels: bool = True

Whether to draw per-polygon labels.

Defaults to True.

polygons: List[PolygonMarker]

A list of PolygonMarkers to display.

simplification_tolerance: ft.Number = 0.3

Defaults to 0.3.

use_alternative_rendering: bool = False

Whether to use an alternative rendering pathway to draw polygons onto the underlying Canvas, which can be more performant in 'some' circumstances.

This will not always improve performance, and there are other important considerations before enabling it. It is intended for use when prior profiling indicates more performance is required after other methods are already in use. For example, it may worsen performance when there are a huge number of polygons to triangulate - and so this is best used in conjunction with simplification, not as a replacement.

Defaults to False.

PolygonMarker

Bases: Control

A marker for the PolygonLayer.

border_color: ft.ColorValue = ft.Colors.GREEN

The color of the border outline.

Defaults to ft.Colors.GREEN.

border_stroke_width: ft.Number = 0.0

The width of the border outline.

Defaults to 0.0.

color: ft.ColorValue = ft.Colors.GREEN

The color of the polygon.

Defaults to ft.Colors.GREEN.

coordinates: List[MapLatitudeLongitude]

The points for the outline of this polygon.

disable_holes_border: bool = False

Whether holes should have borders.

Defaults to False (enabled).

label: Optional[str] = None

An optional label for this polygon.

Note: specifying a label will reduce performance, as the internal canvas must be drawn to and 'saved' more frequently to ensure the proper stacking order is maintained. This can be avoided, potentially at the expense of appearance, by setting PolygonLayer.draw_labels_last.

label_text_style: ft.OptionalTextStyle = None

The text style for the label.

rotate_label: bool = False

Whether to rotate the label counter to the camera's rotation, to ensure it remains upright.

Defaults to False.

stroke_cap: ft.StrokeCap = ft.StrokeCap.ROUND

Style to use for line endings.

Defaults to ft.StrokeCap.ROUND.

stroke_join: ft.StrokeJoin = ft.StrokeJoin.ROUND

Style to use for line segment joins.

Defaults to ft.StrokeJoin.ROUND.