sugar-toolkit-gtk3/sugar/graphics/snowflakebox.py
Marco Pesenti Gritti 7f232c30c2 More fixes
2006-10-06 11:34:29 +02:00

72 lines
1.7 KiB
Python

import math
import cairo
import hippo
_BASE_RADIUS = 65
_CHILDREN_FACTOR = 1
_FLAKE_DISTANCE = 6
class SnowflakeBox(hippo.CanvasBox, hippo.CanvasItem):
__gtype_name__ = 'SugarSnowflakeBox'
def __init__(self, **kwargs):
hippo.CanvasBox.__init__(self, **kwargs)
self._root = None
self._r = 0
def set_root(self, icon):
self._root = icon
def _layout_root(self):
[width, height] = self._root.get_allocation()
x = self._cx - (width / 2)
y = self._cy - (height / 2)
self.move(self._root, int(x), int(y))
def _layout_child(self, child, index):
r = self._r
if (len(self.get_children()) > 10):
r += _FLAKE_DISTANCE * (index % 3)
angle = 2 * math.pi / len(self.get_children()) * index
[width, height] = child.get_allocation()
x = self._cx + math.cos(angle) * r - (width / 2)
y = self._cy + math.sin(angle) * r - (height / 2)
self.move(child, int(x), int(y))
def do_get_width_request(self):
hippo.CanvasBox.do_get_width_request(self)
max_child_size = 0
for child in self.get_children():
width = child.get_width_request()
height = child.get_height_request(width)
max_child_size = max (max_child_size, width)
max_child_size = max (max_child_size, height)
return self._r * 2 + max_child_size + _FLAKE_DISTANCE * 2
def do_get_height_request(self, width):
hippo.CanvasBox.do_get_height_request(self, width)
return width
def do_allocate(self, width, height):
hippo.CanvasBox.do_allocate(self, width, height)
self._cx = width / 2
self._cy = height / 2
self._r = _BASE_RADIUS + _CHILDREN_FACTOR * len(self.get_children())
self._layout_root()
index = 0
for child in self.get_children():
if child != self._root:
self._layout_child(child, index)
index += 1