SweepGradient 继承自： Gradient

Creates a sweep gradient centered at center that starts at start_angle and ends at end_angle.

More information here.

属性

名称	类型	默认值	说明
center	Alignment	Alignment.CENTER()	The center of the gradient, as an offset into the (-1.0, -1.0) x (1.0, 1.0) square describing the gradient which will be mapped onto the paint box. For example, an CENTER will place the sweep gradient in the center of the box.
start_angle	Number	0.0	The angle in radians at which stop 0.0 of the gradient is placed.
end_angle	Number	math.pi * 2	The angle in radians at which stop 1.0 of the gradient is placed.
colors	list[ColorValue]	required	The colors the gradient should obtain at each of the stops. This list must contain at least two colors. If stops is provided, this list must have the same length as it.
tile_mode	GradientTileMode	GradientTileMode.CLAMP	How this gradient should tile the plane beyond in the region before begin and after end.
rotation	Optional[Number]	None	The rotation of the gradient in radians, around the center-point of its bounding box.
stops	Optional[list[Number]]	None	A list of values from 0.0 to 1.0 that denote fractions along the gradient. If provided, this list must have the same length as colors. If the first value is not 0.0, then a stop with position 0.0 and a color equal to the first color in colors is implied. If the last value is not 1.0, then a stop with position 1.0 and a color equal to the last color in colors is implied.

示例

Container with sweep gradient

import math

import flet as ft


def main(page: ft.Page):
    page.add(
        ft.SafeArea(
            content=ft.Column(
                controls=[
                    ft.Container(
                        alignment=ft.Alignment.CENTER,
                        width=150,
                        height=150,
                        border_radius=ft.BorderRadius.all(5),
                        gradient=ft.SweepGradient(
                            center=ft.Alignment.CENTER,
                            start_angle=0.0,
                            end_angle=math.pi * 2,
                            stops=[0.0, 0.25, 0.5, 0.75, 1.0],
                            colors=[
                                "0xFF4285F4",
                                "0xFF34A853",
                                "0xFFFBBC05",
                                "0xFFEA4335",
                                "0xFF4285F4",
                            ],
                        ),
                    )
                ],
            ),
        )
    )


if __name__ == "__main__":
    ft.run(main)