Move the layouts to be box and subclass them.
Marco Pesenti Gritti
18 years ago
parent
f216f7bc0a
commit
b33a1c141f
@ -0,0 +1,67 @@
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import math
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import cairo
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import hippo
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_BASE_RADIUS = 65
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_CHILDREN_FACTOR = 1
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_FLAKE_DISTANCE = 6
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class SnowflakeBox(hippo.CanvasBox, hippo.CanvasItem):
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__gtype_name__ = 'SugarSnowflakeBox'
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def __init__(self, **kwargs):
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CanvasBox.__init__(self, **kwargs)
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self._root = None
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self._r = 0
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def set_root(self, icon):
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self._root = icon
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def _layout_root(self):
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[width, height] = self._root.get_allocation()
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x = self._cx - (width / 2)
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y = self._cy - (height / 2)
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self.move(self._root, int(x), int(y))
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def _layout_child(self, child, index):
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r = self._r
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if (len(box.get_children()) > 10):
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r += _FLAKE_DISTANCE * (index % 3)
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angle = 2 * math.pi / len(box.get_children()) * index
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[width, height] = child.get_allocation()
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x = self._cx + math.cos(angle) * r - (width / 2)
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y = self._cy + math.sin(angle) * r - (height / 2)
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self.move(child, int(x), int(y))
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def do_get_width_request(self):
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max_child_size = 0
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for child in box.get_children():
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[width, height] = child.get_allocation()
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max_child_size = max (max_child_size, width)
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max_child_size = max (max_child_size, height)
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return self._r * 2 + max_child_size + _FLAKE_DISTANCE * 2
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def do_get_height_request(self, width):
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return width
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def do_allocate(self, width, height):
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self._r = _BASE_RADIUS + _CHILDREN_FACTOR * len(box.get_children())
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hippo.CanvasBox.do_allocate(self, width, height)
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self._cx = self.get_width_request() / 2
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self._cy = self.get_height_request() / 2
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self._layout_root(box)
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index = 0
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for child in box.get_children():
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self._layout_child(child, index)
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index += 1
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@ -1,61 +0,0 @@
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import math
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import cairo
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class SnowflakeLayout:
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_BASE_RADIUS = 65
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_CHILDREN_FACTOR = 1
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_FLAKE_DISTANCE = 6
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def __init__(self):
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self._root = None
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self._r = 0
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def set_root(self, icon):
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self._root = icon
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def _layout_root(self, box):
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[width, height] = self._root.get_allocation()
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x = self._cx - (width / 2)
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y = self._cy - (height / 2)
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box.move(self._root, int(x), int(y))
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def _layout_child(self, box, child, index):
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r = self._r
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if (len(box.get_children()) > 10):
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r += SnowflakeLayout._FLAKE_DISTANCE * (index % 3)
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angle = 2 * math.pi / len(box.get_children()) * index
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[width, height] = child.get_allocation()
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x = self._cx + math.cos(angle) * r - (width / 2)
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y = self._cy + math.sin(angle) * r - (height / 2)
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box.move(child, int(x), int(y))
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def get_size(self, box):
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max_child_size = 0
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for child in box.get_children():
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[width, height] = child.get_allocation()
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max_child_size = max (max_child_size, width)
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max_child_size = max (max_child_size, height)
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return self._r * 2 + max_child_size + \
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SnowflakeLayout._FLAKE_DISTANCE * 2
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def layout(self, box):
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self._r = SnowflakeLayout._BASE_RADIUS + \
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SnowflakeLayout._CHILDREN_FACTOR * len(box.get_children())
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size = self.get_size(box)
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self._cx = size / 2
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self._cy = size / 2
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self._layout_root(box)
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index = 0
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for child in box.get_children():
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self._layout_child(box, child, index)
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index += 1
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@ -0,0 +1,101 @@
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import random
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import math
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import cairo
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import hippo
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_DISTANCE_THRESHOLD = 120.0
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class SpreadBox(hippo.CanvasBox, hippo.CanvasItem):
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__gtype_name__ = 'SugarSpreadBox'
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def __init__(self, **kwargs):
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hippo.CanvasBox.__init__(self, **kwargs)
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self._items_to_position = []
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self._spread_on_add = False
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def add(self, item):
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self._items_to_position.append(item)
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self.append(item, hippo.PACK_FIXED)
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if self._spread_on_add:
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self.spread()
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def spread(self):
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self._spread_on_add = True
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[width, height] = self.get_allocation()
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for item in self._items_to_position:
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x = int(random.random() * width)
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y = int(random.random() * height)
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[x, y] = self._clamp_position(item, x, y)
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self.move(item, x, y)
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self._items_to_position = []
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def _get_distance(self, icon1, icon2):
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[icon1_x, icon1_y] = self.get_position(icon1)
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[icon2_x, icon2_y] = self.get_position(icon2)
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a = icon1_x - icon2_x
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b = icon1_y - icon2_y
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return math.sqrt(a * a + b * b)
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def _get_repulsion(self, icon1, icon2):
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[icon1_x, icon1_y] = self.get_position(icon1)
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[icon2_x, icon2_y] = self.get_position(icon2)
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f_x = icon1_x - icon2_x
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f_y = icon1_y - icon2_y
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return [f_x, f_y]
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def _clamp_position(self, icon, x, y):
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x = max(0, x)
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y = max(0, y)
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[item_w, item_h] = icon.get_allocation()
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[box_w, box_h] = self.get_allocation()
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x = min(box_w - item_w, x)
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y = min(box_h - item_h, y)
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return [x, y]
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def _spread_icons(self):
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stable = True
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for icon1 in self.get_children():
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vx = 0
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vy = 0
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[x, y] = self.get_position(icon1)
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for icon2 in self.get_children():
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if icon1 != icon2:
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distance = self._get_distance(icon1, icon2)
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if distance <= _DISTANCE_THRESHOLD:
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stable = False
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[f_x, f_y] = self._get_repulsion(icon1, icon2)
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vx += f_x
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vy += f_y
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new_x = x + vx
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new_y = y + vy
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[new_x, new_y] = self._clamp_position(icon1, new_x, new_y)
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self.move(icon1, new_x, new_y)
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return stable
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def do_allocate(self, width, height):
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hippo.CanvasBox.do_allocate(self, width, height)
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tries = 10
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stable = self._spread_icons()
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while not stable and tries > 0:
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stable = self._spread_icons()
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tries -= 1
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@ -1,86 +0,0 @@
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import random
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import math
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import cairo
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_DISTANCE_THRESHOLD = 120.0
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class SpreadLayout:
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def __init__(self):
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pass
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def _get_distance(self, box, icon1, icon2):
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[icon1_x, icon1_y] = box.get_position(icon1)
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[icon2_x, icon2_y] = box.get_position(icon2)
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a = icon1_x - icon2_x
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b = icon1_y - icon2_y
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return math.sqrt(a * a + b * b)
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def _get_repulsion(self, box, icon1, icon2):
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[icon1_x, icon1_y] = box.get_position(icon1)
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[icon2_x, icon2_y] = box.get_position(icon2)
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f_x = icon1_x - icon2_x
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f_y = icon1_y - icon2_y
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return [f_x, f_y]
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def _clamp_position(self, box, icon, x, y):
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x = max(0, x)
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y = max(0, y)
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[item_w, item_h] = icon.get_allocation()
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[box_w, box_h] = box.get_allocation()
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x = min(box_w - item_w, x)
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y = min(box_h - item_h, y)
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return [x, y]
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def _spread_icons(self, box):
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stable = True
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for icon1 in box.get_children():
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vx = 0
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vy = 0
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[x, y] = box.get_position(icon1)
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for icon2 in box.get_children():
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if icon1 != icon2:
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distance = self._get_distance(box, icon1, icon2)
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if distance <= _DISTANCE_THRESHOLD:
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stable = False
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[f_x, f_y] = self._get_repulsion(box, icon1, icon2)
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vx += f_x
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vy += f_y
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new_x = x + vx
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new_y = y + vy
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[new_x, new_y] = self._clamp_position(box, icon1, new_x, new_y)
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box.move(icon1, new_x, new_y)
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return stable
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def layout(self, box):
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[width, height] = box.get_allocation()
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for item in box.get_children():
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[item_w, item_h] = item.get_allocation()
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x = int(random.random() * width)
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y = int(random.random() * height)
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[x, y] = self._clamp_position(box, item, x, y)
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box.move(item, x, y)
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tries = 10
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stable = self._spread_icons(box)
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while not stable and tries > 0:
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stable = self._spread_icons(box)
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tries -= 1
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