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Diffstat (limited to 'sugar/graphics/spreadbox.py')
| -rw-r--r-- | sugar/graphics/spreadbox.py | 190 |
1 files changed, 0 insertions, 190 deletions
diff --git a/sugar/graphics/spreadbox.py b/sugar/graphics/spreadbox.py deleted file mode 100644 index 1c1ffc9..0000000 --- a/sugar/graphics/spreadbox.py +++ /dev/null @@ -1,190 +0,0 @@ -# Copyright (C) 2006-2007 Red Hat, Inc. -# -# This library is free software; you can redistribute it and/or -# modify it under the terms of the GNU Lesser General Public -# License as published by the Free Software Foundation; either -# version 2 of the License, or (at your option) any later version. -# -# This library is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY; without even the implied warranty of -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -# Lesser General Public License for more details. -# -# You should have received a copy of the GNU Lesser General Public -# License along with this library; if not, write to the -# Free Software Foundation, Inc., 59 Temple Place - Suite 330, -# Boston, MA 02111-1307, USA. - -from array import array -from random import random - -import gobject -import hippo - -_X_TILES = 120 -_NUM_TRIALS = 20 -_MAX_WEIGHT = 255 - -class _Grid(object): - def __init__(self, x_tiles, y_tiles, cell_size): - self._array = array('B') - self.x_tiles = x_tiles - self.y_tiles = y_tiles - self.cell_size = cell_size - - for i in range(self.y_tiles * self.x_tiles): - self._array.append(0) - - def __getitem__(self, (row, col)): - return self._array[col + row * self.x_tiles] - - def __setitem__(self, (row, col), value): - self._array[col + row * self.x_tiles] = value - - def compute_weight_at(self, x, y, width, height): - weight = 0 - - for i in range(x, x + width): - for j in range(y, y + height): - weight += self[j, i] - - return weight - - def add_weight_at(self, x, y, width, height): - for i in range(x, x + width): - for j in range(y, y + height): - self[j, i] += 1 - - def remove_weight_at(self, x, y, width, height): - for i in range(x, x + width): - for j in range(y, y + height): - self[j, i] -= 1 - - def from_canvas(self, dim): - return dim / self.cell_size - - def to_canvas(self, dim): - return dim * self.cell_size - -class _ItemInfo(gobject.GObject): - def __init__(self): - gobject.GObject.__init__(self) - self.x = -1 - self.y = -1 - self.width = -1 - self.height = -1 - - def add_weight(self, grid): - grid.add_weight_at(self.x, self.y, self.width, self.height) - - def remove_weight(self, grid): - grid.remove_weight_at(self.x, self.y, self.width, self.height) - - def compute_weight(self, grid, x=-1, y=-1): - if x < 0: - x = self.x - if y < 0: - y = self.y - - grid.compute_weight_at(x, y, self.width, self.height) - -class SpreadBox(hippo.CanvasBox, hippo.CanvasItem): - __gtype_name__ = 'SugarSpreadBox' - def __init__(self, **kwargs): - hippo.CanvasBox.__init__(self, **kwargs) - - self._grid = None - self._center = None - self._width = -1 - self._height = -1 - - def set_center_item(self, item): - if self._center: - self.remove(self._center) - - self.append(item, hippo.PACK_FIXED) - self._center = item - - self._layout_center() - - def add_item(self, item): - item.set_data('item-info', _ItemInfo()) - self.append(item, hippo.PACK_FIXED) - self._layout_item(item) - - def remove_item(self, item): - if self._grid: - info = item.get_data('item-info') - info.remove_weight(self._grid) - - self.remove(item) - - def _place_item(self, item, x, y): - info = item.get_data('item-info') - info.x = x - info.y = y - info.add_weight(self._grid) - - self.set_position(item, self._grid.to_canvas(x), - self._grid.to_canvas(y)) - - def _layout_item(self, item): - if not self._grid: - return - - info = item.get_data('item-info') - - [width, height] = item.get_allocation() - info.width = self._grid.from_canvas(width) - info.height = self._grid.from_canvas(height) - - trials = _NUM_TRIALS - placed = False - best_weight = _MAX_WEIGHT - - while trials > 0 and not placed: - x = int(random() * (self._grid.x_tiles - info.width)) - y = int(random() * (self._grid.y_tiles - info.height)) - - weight = info.compute_weight(self._grid, x, y) - - if weight == 0: - self._place_item(item, x, y) - placed = True - elif weight < best_weight: - best_x = x - best_y = y - - trials -= 1 - - if not placed: - self._place_item(item, best_x, best_y) - - def _layout(self): - for item in self.get_children(): - if item != self._center: - self._layout_item(item) - - def _layout_center(self): - if not self._center or not self._grid: - return - - [width, height] = self._center.get_allocation() - x = (self._width - width) / 2 - y = (self._height - height) / 2 - self.set_position(self._center, x, y) - - def do_allocate(self, width, height, origin_changed): - hippo.CanvasBox.do_allocate(self, width, height, origin_changed) - - if width != self._width or height != self._height: - cell_size = width / _X_TILES - y_tiles = height / cell_size - - self._grid = _Grid(_X_TILES, y_tiles, cell_size) - self._width = width - self._height = height - - self._layout() - - self._layout_center() |