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Walter
Joined 8 May 2008
→Home View
A new, tighter spiral for the Home View:
A new, tighter spiral for the Home View:
[[File:SpiralHomeView.png|300px]]
[[File:Spiral-home-view.png|300px]]
<code>
class MyLayout(RingLayout):
"""Spiral layout based on Archimedean spiral: r = a + b*theta."""
__gtype_name__ = 'MyLayout'
icon_name = 'view-mylayout'
"""Name of icon used in home view dropdown palette."""
profile_key = 'my-layout'
"""String used in profile to represent this view."""
def __init__(self):
RingLayout.__init__(self)
self.my_radius = _MINIMUM_RADIUS
self.my_orientation = math.pi
def _calculate_radius_and_icon_size(self, children_count):
"""Stub out this method; not used in `My Layout`."""
return _MINIMUM_RADIUS, style.STANDARD_ICON_SIZE
def _calculate_position(self, radius, icon_size, index, children_count):
""" Increment the radius as you go """
if index == 0:
self.my_radius = _MINIMUM_RADIUS
self.my_orientation = math.pi
x, y = self._calculate_xy()
# add some buffering around the icon
self._calculate_new_radius_orientation(icon_size + 10)
width, height = self.box.get_allocation()
return int(x) + (width - icon_size) / 2, \
int(y) + (height - icon_size - (style.GRID_CELL_SIZE / 2) ) / 2
def _calculate_xy(self):
""" Convert r, o to x, y """
return -math.sin(self.my_orientation) * self.my_radius, \
math.cos(self.my_orientation) * self.my_radius
def _calculate_new_radius_orientation(self, icon_size):
""" Based upon current radius, calculate new increments """
circumference = self.my_radius * 2 * math.pi
n = circumference / icon_size
self.my_orientation += 2 * math.pi / n
self.my_radius += float(icon_size) / n
</code>
====Keyboards====
====Keyboards====