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→Sandbox
* [[User:Walter/sandbox]]
* [[User:Walter/sandbox]]
* [[User:Walter/favoritelayout.py]]
* [[User:Walter/favoritelayout.py]]
[[Image:Spiral.png|thumb|left]]
[[Image:Spiral.png|thumb|left|<pre>
[[Image:FermatSpiral.png|thumb|left]]
def _calculate_position(self, radius, icon_size, index, children_count):
width, height = self.box.get_allocation()
# angle decreases as the radius increases
inc = 12.0 + index / 6.0
angle = index * (2 * math.pi / inc) - math.pi / 2
# radius is proportional to index/children_count
myminimum = _MINIMUM_RADIUS * .667
newradius = ((radius - myminimum) * (index * 1.1) / children_count) +
myminimum
x = newradius * math.cos(angle) + (width - icon_size) / 2
y = newradius * math.sin(angle) + (height - icon_size -
style.GRID_CELL_SIZE) / 2
return x, y
</pre>]]
[[Image:FermatSpiral.png|thumb|left|<pre>
def _calculate_position(self, radius, icon_size, index, children_count):
width, height = self.box.get_allocation()
# include an offset (8) to the index
# so that the center of the spiral is left blank
# angle = n * 137.5 degree or 2.4 radians
angle = (index + 8) * 2.4
# radius = constant * sqrt(n)
radius = (_MINIMUM_RADIUS / 5) * math.sqrt(index + 8)
x = radius * math.cos(angle) + (width - icon_size) / 2
y = radius * math.sin(angle) + (height - icon_size -
style.GRID_CELL_SIZE) / 2
return x, y
</pre>]]