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Another iteration on the spread out box. Make it work

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well also for the mesh.
This commit is contained in:
Marco Pesenti Gritti
2006-10-25 14:31:44 +02:00
parent 15e3a4f791
commit ebb896cb5b
2 changed files with 37 additions and 26 deletions
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sugar/graphics/spreadbox.py
+30 -15
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@@ -21,7 +21,8 @@ import math
import cairo
import hippo
_DISTANCE_THRESHOLD = 120.0
_DISTANCE_THRESHOLD = 10.0
_FORCE_CONSTANT = 0.1
class SpreadBox(hippo.CanvasBox, hippo.CanvasItem):
__gtype_name__ = 'SugarSpreadBox'
@@ -41,21 +42,36 @@ class SpreadBox(hippo.CanvasBox, hippo.CanvasItem):
self._items_to_position.remove(item)
self.remove(item)
def _get_distance(self, icon1, icon2):
[icon1_x, icon1_y] = self.get_position(icon1)
[icon2_x, icon2_y] = self.get_position(icon2)
def _get_item_radius(self, item):
[width, height] = item.get_request()
return math.sqrt(width ** 2 + height ** 2) / 2
a = icon1_x - icon2_x
b = icon1_y - icon2_y
def _get_item_center(self, item):
[width, height] = item.get_request()
[x, y] = self.get_position(item)
return math.sqrt(a * a + b * b)
c_x = int(x + float(width) / 2.0)
c_y = int(y + float(height) / 2.0)
return [c_x, c_y]
def _get_repulsion(self, icon1, icon2):
[icon1_x, icon1_y] = self.get_position(icon1)
[icon2_x, icon2_y] = self.get_position(icon2)
[c1_x, c1_y] = self._get_item_center(icon1)
[c2_x, c2_y] = self._get_item_center(icon2)
f_x = icon1_x - icon2_x
f_y = icon1_y - icon2_y
a = c2_x - c1_x
b = c2_y - c1_y
r1 = self._get_item_radius(icon1)
r2 = self._get_item_radius(icon2)
distance = math.sqrt(a ** 2 + b ** 2) - r1 - r2
if distance < _DISTANCE_THRESHOLD:
f_x = int(math.ceil(-_FORCE_CONSTANT * float(a)))
f_y = int(math.ceil(-_FORCE_CONSTANT * float(b)))
else:
f_x = 0
f_y = 0
return [f_x, f_y]
@@ -80,10 +96,9 @@ class SpreadBox(hippo.CanvasBox, hippo.CanvasItem):
for icon2 in self.get_children():
if icon1 != icon2:
distance = self._get_distance(icon1, icon2)
if distance <= _DISTANCE_THRESHOLD:
[f_x, f_y] = self._get_repulsion(icon1, icon2)
if f_x != 0 or f_y != 0:
self._stable = False
[f_x, f_y] = self._get_repulsion(icon1, icon2)
vx += f_x
vy += f_y
@@ -110,7 +125,7 @@ class SpreadBox(hippo.CanvasBox, hippo.CanvasItem):
self._items_to_position = []
tries = 10
tries = 20
self._spread_icons()
while not self._stable and tries > 0:
self._spread_icons()