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26 lines
646 B
Python
26 lines
646 B
Python
import math
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from sugar.scene.LayoutManager import LayoutManager
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class CircleLayout(LayoutManager):
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def __init__(self, radius):
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LayoutManager.__init__(self)
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self._radius = radius
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self._angle = 0
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def set_angle(self, angle):
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self._angle = angle
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def layout_group(self, group):
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step = 2 * math.pi / len(group.get_actors())
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angle = self._angle
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for actor in group.get_actors():
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self._update_position(actor, angle)
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angle += step
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def _update_position(self, actor, angle):
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x = math.cos(angle) * self._radius + self._radius
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y = math.sin(angle) * self._radius + self._radius
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actor.set_position(int(x + 0.5), int(y + 0.5))
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