115 lines
3.0 KiB
Python
115 lines
3.0 KiB
Python
import math
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import goocanvas
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from sugar.canvas.IconItem import IconItem
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class PieceIcon(IconItem):
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def __init__(self, piece_item, **kwargs):
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IconItem.__init__(self, size=48, **kwargs)
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self._piece_item = piece_item
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def construct(self):
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angle_start = self._piece_item.get_angle_start()
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angle_end = self._piece_item.get_angle_end()
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radius = self.get_parent().get_radius()
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inner_radius = self.get_parent().get_inner_radius()
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icon_radius = (radius + inner_radius) / 2
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icon_angle = (angle_start + angle_end) / 2
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x = icon_radius * math.cos(icon_angle)
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y = - icon_radius * math.sin(icon_angle)
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icon_width = self.get_property('size')
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icon_height = self.get_property('size')
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self.set_property('x', x - icon_width / 2)
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self.set_property('y', y - icon_height / 2)
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class PieceItem(goocanvas.Path):
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def __init__(self, angle_start, angle_end, **kwargs):
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goocanvas.Path.__init__(self, **kwargs)
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self._angle_start = angle_start
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self._angle_end = angle_end
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self.set_property('fill-color', '#ffffff')
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self.set_property('stroke-color', '#e2e2e2')
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self.set_property('line-width', 4)
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def get_icon(self):
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return self._icon
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def set_icon(self, icon_name, color):
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self._icon = PieceIcon(self, icon_name=icon_name, color=color)
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self.get_parent().add_child(self._icon)
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self._icon.construct()
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def get_angle_start(self):
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return self._angle_start
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def get_angle_end(self):
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return self._angle_end
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def construct(self):
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r = self.get_parent().get_radius()
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data = 'M0,0 '
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dx = r * math.cos(self._angle_start)
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dy = - r * math.sin(self._angle_start)
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data += 'l%f,%f ' % (dx, dy)
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dx = r * math.cos(self._angle_end)
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dy = - r * math.sin(self._angle_end)
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data += 'A%f,%f 0 0,0 %f,%f ' % (r, r, dx, dy)
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data += 'z'
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self.set_property('data', data)
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class DonutItem(goocanvas.Group):
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def __init__(self, radius, **kwargs):
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goocanvas.Group.__init__(self, **kwargs)
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self._radius = radius
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self._angle_start = 0
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bg = goocanvas.Ellipse(radius_x=radius, radius_y=radius,
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fill_color='#f1f1f1', line_width=0)
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self.add_child(bg)
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self._inner_radius = radius / 2
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fg = goocanvas.Ellipse(radius_x=self._inner_radius,
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radius_y=self._inner_radius,
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fill_color='#e2e2e2', line_width=0)
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self.add_child(fg)
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def add_piece(self, perc, icon_name, color):
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# FIXME can't override set_parent on the
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# PieceItem and there is no signal. So we
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# call a construct method on the childs for now.
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angle_end = self._angle_start + perc * 2 * math.pi / 100
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piece_item = PieceItem(self._angle_start, angle_end)
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self._angle_start = angle_end
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self.add_child(piece_item, 1)
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piece_item.construct()
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piece_item.set_icon(icon_name, color)
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return piece_item
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def remove_piece(self, piece_item):
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index = self.find_child(piece_item)
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self.remove_child(index)
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icon = piece_item.get_icon()
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index = self.find_child(icon)
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self.remove_child(index)
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def get_radius(self):
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return self._radius
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def get_inner_radius(self):
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return self._inner_radius
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