diff options
Diffstat (limited to 'sugar/graphics/spreadbox.py')
| -rw-r--r-- | sugar/graphics/spreadbox.py | 152 |
1 files changed, 76 insertions, 76 deletions
diff --git a/sugar/graphics/spreadbox.py b/sugar/graphics/spreadbox.py index 7d4047d..59dfe9c 100644 --- a/sugar/graphics/spreadbox.py +++ b/sugar/graphics/spreadbox.py @@ -25,108 +25,108 @@ _DISTANCE_THRESHOLD = 10.0 _FORCE_CONSTANT = 0.1 class SpreadBox(hippo.CanvasBox, hippo.CanvasItem): - __gtype_name__ = 'SugarSpreadBox' + __gtype_name__ = 'SugarSpreadBox' - def __init__(self, **kwargs): - hippo.CanvasBox.__init__(self, **kwargs) + def __init__(self, **kwargs): + hippo.CanvasBox.__init__(self, **kwargs) - self._items_to_position = [] - self._stable = False + self._items_to_position = [] + self._stable = False - def add_item(self, item): - self._items_to_position.append(item) - self.append(item, hippo.PACK_FIXED) + def add_item(self, item): + self._items_to_position.append(item) + self.append(item, hippo.PACK_FIXED) - def remove_item(self, item): - if self._items_to_position.count(item) > 0: - self._items_to_position.remove(item) - self.remove(item) + def remove_item(self, item): + if self._items_to_position.count(item) > 0: + self._items_to_position.remove(item) + self.remove(item) - def _get_item_radius(self, item): - [width, height] = item.get_request() - return math.sqrt(width ** 2 + height ** 2) / 2 + def _get_item_radius(self, item): + [width, height] = item.get_request() + return math.sqrt(width ** 2 + height ** 2) / 2 - def _get_item_center(self, item): - [width, height] = item.get_request() - [x, y] = self.get_position(item) + def _get_item_center(self, item): + [width, height] = item.get_request() + [x, y] = self.get_position(item) - c_x = int(x + float(width) / 2.0) - c_y = int(y + float(height) / 2.0) + c_x = int(x + float(width) / 2.0) + c_y = int(y + float(height) / 2.0) - return [c_x, c_y] + return [c_x, c_y] - def _get_repulsion(self, icon1, icon2): - [c1_x, c1_y] = self._get_item_center(icon1) - [c2_x, c2_y] = self._get_item_center(icon2) + def _get_repulsion(self, icon1, icon2): + [c1_x, c1_y] = self._get_item_center(icon1) + [c2_x, c2_y] = self._get_item_center(icon2) - a = c2_x - c1_x - b = c2_y - c1_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 + 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 + 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] + return [f_x, f_y] - def _clamp_position(self, icon, x, y): - x = max(0, x) - y = max(0, y) + def _clamp_position(self, icon, x, y): + x = max(0, x) + y = max(0, y) - [item_w, item_h] = icon.get_request() - [box_w, box_h] = self.get_allocation() + [item_w, item_h] = icon.get_request() + [box_w, box_h] = self.get_allocation() - x = min(box_w - item_w, x) - y = min(box_h - item_h, y) + x = min(box_w - item_w, x) + y = min(box_h - item_h, y) - return [x, y] + return [x, y] - def _spread_icons(self): - self._stable = True + def _spread_icons(self): + self._stable = True - for icon1 in self.get_children(): - vx = 0 - vy = 0 + for icon1 in self.get_children(): + vx = 0 + vy = 0 - for icon2 in self.get_children(): - if icon1 != icon2: - [f_x, f_y] = self._get_repulsion(icon1, icon2) - if f_x != 0 or f_y != 0: - self._stable = False - vx += f_x - vy += f_y + for icon2 in self.get_children(): + if icon1 != icon2: + [f_x, f_y] = self._get_repulsion(icon1, icon2) + if f_x != 0 or f_y != 0: + self._stable = False + vx += f_x + vy += f_y - if vx != 0 or vy != 0: - [x, y] = self.get_position(icon1) - new_x = x + vx - new_y = y + vy + if vx != 0 or vy != 0: + [x, y] = self.get_position(icon1) + new_x = x + vx + new_y = y + vy - [new_x, new_y] = self._clamp_position(icon1, new_x, new_y) + [new_x, new_y] = self._clamp_position(icon1, new_x, new_y) - self.move(icon1, new_x, new_y) + self.move(icon1, new_x, new_y) - def do_allocate(self, width, height): - hippo.CanvasBox.do_allocate(self, width, height) + def do_allocate(self, width, height): + hippo.CanvasBox.do_allocate(self, width, height) - for item in self._items_to_position: - [item_w, item_h] = item.get_request() + for item in self._items_to_position: + [item_w, item_h] = item.get_request() - x = int(random.random() * width - item_w) - y = int(random.random() * height - item_h) + x = int(random.random() * width - item_w) + y = int(random.random() * height - item_h) - [x, y] = self._clamp_position(item, x, y) - self.move(item, x, y) + [x, y] = self._clamp_position(item, x, y) + self.move(item, x, y) - self._items_to_position = [] + self._items_to_position = [] - tries = 20 - self._spread_icons() - while not self._stable and tries > 0: - self._spread_icons() - tries -= 1 + tries = 20 + self._spread_icons() + while not self._stable and tries > 0: + self._spread_icons() + tries -= 1 |