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import math
import goocanvas
from sugar.canvas.IconItem import IconItem
class PieceIcon(IconItem):
def __init__(self, piece_item, **kwargs):
IconItem.__init__(self, size=96, **kwargs)
self._piece_item = piece_item
def construct(self):
angle_start = self._piece_item.get_angle_start()
angle_end = self._piece_item.get_angle_end()
radius = self.get_parent().get_radius()
inner_radius = self.get_parent().get_inner_radius()
icon_radius = (radius + inner_radius) / 2
icon_angle = (angle_start + angle_end) / 2
x = icon_radius * math.cos(icon_angle)
y = - icon_radius * math.sin(icon_angle)
icon_width = self.get_property('size')
icon_height = self.get_property('size')
self.set_property('x', x - icon_width / 2)
self.set_property('y', y - icon_height / 2)
class PieceItem(goocanvas.Path):
def __init__(self, angle_start, angle_end, **kwargs):
goocanvas.Path.__init__(self, **kwargs)
self._angle_start = angle_start
self._angle_end = angle_end
self.set_property('fill-color', '#ffffff')
self.set_property('stroke-color', '#e2e2e2')
self.set_property('line-width', 4)
def get_icon(self):
return self._icon
def set_icon(self, icon_name, color):
self._icon = PieceIcon(self, icon_name=icon_name, color=color)
self.get_parent().add_child(self._icon)
self._icon.construct()
def get_angle_start(self):
return self._angle_start
def get_angle_end(self):
return self._angle_end
def construct(self):
r = self.get_parent().get_radius()
data = 'M0,0 '
dx = r * math.cos(self._angle_start)
dy = - r * math.sin(self._angle_start)
data += 'l%f,%f ' % (dx, dy)
dx = r * math.cos(self._angle_end)
dy = - r * math.sin(self._angle_end)
data += 'A%f,%f 0 0,0 %f,%f ' % (r, r, dx, dy)
data += 'z'
self.set_property('data', data)
class DonutItem(goocanvas.Group):
def __init__(self, radius, **kwargs):
goocanvas.Group.__init__(self, **kwargs)
self._radius = radius
self._angle_start = 0
bg = goocanvas.Ellipse(radius_x=radius, radius_y=radius,
fill_color='#f1f1f1', line_width=0)
self.add_child(bg)
self._inner_radius = radius / 2
fg = goocanvas.Ellipse(radius_x=self._inner_radius,
radius_y=self._inner_radius,
fill_color='#e2e2e2', line_width=0)
self.add_child(fg)
def add_piece(self, perc, icon_name, color):
# FIXME can't override set_parent on the
# PieceItem and there is no signal. So we
# call a construct method on the childs for now.
angle_end = self._angle_start + perc * 2 * math.pi / 100
piece_item = PieceItem(self._angle_start, angle_end)
self._angle_start = angle_end
self.add_child(piece_item, 1)
piece_item.construct()
piece_item.set_icon(icon_name, color)
return piece_item
def remove_piece(self, piece_item):
index = self.find_child(piece_item)
self.remove_child(index)
icon = piece_item.get_icon()
index = self.find_child(icon)
self.remove_child(index)
def get_radius(self):
return self._radius
def get_inner_radius(self):
return self._inner_radius
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