sugarlabs/sugar-toolkit-gtk3
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This commit is contained in:
Marco Pesenti Gritti 2006-09-25 20:50:15 +02:00
parent 550c201101
commit a8322a76eb
2 changed files with 17 additions and 11 deletions
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26
sugar/canvas/SnowflakeLayout.py
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@ -6,12 +6,11 @@ class SnowflakeLayout:
_BASE_RADIUS = 65 _BASE_RADIUS = 65
_CHILDREN_FACTOR = 1 _CHILDREN_FACTOR = 1
_FLAKE_DISTANCE = 6 _FLAKE_DISTANCE = 6
_BORDER = 20
def __init__(self): def __init__(self):
self._root = None self._root = None
self._children = [] self._children = []
self._size = 0 self._r = 0
def set_root(self, icon): def set_root(self, icon):
self._root = icon self._root = icon
@ -28,7 +27,7 @@ class SnowflakeLayout:
[width, height] = self._root.get_size_request() [width, height] = self._root.get_size_request()
matrix = cairo.Matrix(1, 0, 0, 1, 0, 0) matrix = cairo.Matrix(1, 0, 0, 1, 0, 0)
matrix.translate(self._cx, self._cy) matrix.translate(self._cx - (width / 2), self._cy - (height / 2))
self._root.set_transform(matrix) self._root.set_transform(matrix)
def _layout_child(self, child, index): def _layout_child(self, child, index):
@ -38,24 +37,31 @@ class SnowflakeLayout:
angle = 2 * math.pi / len(self._children) * index angle = 2 * math.pi / len(self._children) * index
x = self._cx + math.cos(angle) * r [width, height] = child.get_size_request()
y = self._cy + math.sin(angle) * r x = self._cx + math.cos(angle) * r - (width / 2)
y = self._cy + math.sin(angle) * r - (height / 2)
matrix = cairo.Matrix(1, 0, 0, 1, 0, 0) matrix = cairo.Matrix(1, 0, 0, 1, 0, 0)
matrix.translate(x, y) matrix.translate(x, y)
child.set_transform(matrix) child.set_transform(matrix)
def get_size(self): def get_size(self):
return self._size max_child_size = 0
for child in self._children:
[width, height] = child.get_size_request()
max_child_size = max (max_child_size, width)
max_child_size = max (max_child_size, height)
return self._r * 2 + max_child_size + \
SnowflakeLayout._FLAKE_DISTANCE * 2
def _layout(self): def _layout(self):
self._r = SnowflakeLayout._BASE_RADIUS + \ self._r = SnowflakeLayout._BASE_RADIUS + \
SnowflakeLayout._CHILDREN_FACTOR * len(self._children) SnowflakeLayout._CHILDREN_FACTOR * len(self._children)
self._size = self._r * 2 + SnowflakeLayout._BORDER + \
SnowflakeLayout._FLAKE_DISTANCE * 2
self._cx = self._size / 2 size = self.get_size()
self._cy = self._size / 2 self._cx = size / 2
self._cy = size / 2
self._layout_root() self._layout_root()

2
tests/test-snowflake.py
View File

@ -22,7 +22,7 @@ from sugar.canvas.Grid import Grid
def _create_snowflake(group, children): def _create_snowflake(group, children):
color = IconColor.IconColor() color = IconColor.IconColor()
icon = IconItem(size=60, color=color, icon = IconItem(size=40, color=color,
icon_name='activity-groupchat') icon_name='activity-groupchat')
group.add_child(icon) group.add_child(icon)
layout.set_root(icon) layout.set_root(icon)