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Diffstat (limited to 'src/view/home/spreadlayout.py')
| -rw-r--r-- | src/view/home/spreadlayout.py | 246 |
1 files changed, 0 insertions, 246 deletions
diff --git a/src/view/home/spreadlayout.py b/src/view/home/spreadlayout.py deleted file mode 100644 index 3463169..0000000 --- a/src/view/home/spreadlayout.py +++ /dev/null @@ -1,246 +0,0 @@ -# Copyright (C) 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 numpy import array -from random import random - -import hippo -import gobject -import gtk - -from sugar.graphics import style - -_PLACE_TRIALS = 20 -_MAX_WEIGHT = 255 -_CELL_SIZE = 4 - -class _Grid(gobject.GObject): - __gsignals__ = { - 'child-changed' : (gobject.SIGNAL_RUN_FIRST, - gobject.TYPE_NONE, - ([gobject.TYPE_PYOBJECT])) - } - def __init__(self, width, height): - gobject.GObject.__init__(self) - - self.width = width - self.height = height - self._children = [] - self._collisions = [] - self._collisions_sid = 0 - - self._array = array([0], dtype='b') - self._array.resize(width * height) - - def add(self, child, width, height): - trials = _PLACE_TRIALS - weight = _MAX_WEIGHT - while trials > 0 and weight: - x = int(random() * (self.width - width)) - y = int(random() * (self.height - height)) - - rect = gtk.gdk.Rectangle(x, y, width, height) - new_weight = self._compute_weight(rect) - if weight > new_weight: - weight = new_weight - - trials -= 1 - - child.grid_rect = rect - child.locked = False - - self._add_child(child) - - if weight > 0: - self._detect_collisions(child) - - def remove(self, child): - self._children.remove(child) - self._remove_weight(child.grid_rect) - child.grid_rect = None - - def _add_child(self, child): - self._children.append(child) - self.add_weight(child.grid_rect) - - def _move_child(self, child, new_rect): - self._remove_weight(child.grid_rect) - self.add_weight(new_rect) - - child.grid_rect = new_rect - - self.emit('child-changed', child) - - def _shift_child(self, child): - rect = child.grid_rect - weight = self._compute_weight(rect) - new_rects = [] - - if (rect.x + rect.width < self.width - 1): - new_rects.append(gtk.gdk.Rectangle(rect.x + 1, rect.y, - rect.width, rect.height)) - - if (rect.x - 1 > 0): - new_rects.append(gtk.gdk.Rectangle(rect.x - 1, rect.y, - rect.width, rect.height)) - - if (rect.y + rect.height < self.height - 1): - new_rects.append(gtk.gdk.Rectangle(rect.x, rect.y + 1, - rect.width, rect.height)) - - if (rect.y - 1 > 0): - new_rects.append(gtk.gdk.Rectangle(rect.x, rect.y - 1, - rect.width, rect.height)) - - best_rect = None - for new_rect in new_rects: - new_weight = self._compute_weight(new_rect) - if new_weight < weight: - best_rect = new_rect - weight = new_weight - - if best_rect: - self._move_child(child, best_rect) - - return weight - - - def _solve_collisions(self): - for collision in self._collisions[:]: - weight = self._shift_child(collision) - if not weight: - self._collisions.remove(collision) - - return (len(self._collisions) > 0) - - def _detect_collisions(self, child): - collision_found = False - for c in self._children: - intersection = child.grid_rect.intersect(c.grid_rect) - if c != child and intersection.width > 0: - if c not in self._collisions: - collision_found = True - self._collisions.append(c) - - if collision_found: - if child not in self._collisions: - self._collisions.append(child) - -# if len(self._collisions) and not self._collisions_sid: -# self._collisions_sid = gobject.idle_add(self._solve_collisions) - - def add_weight(self, rect): - for i in range(rect.x, rect.x + rect.width): - for j in range(rect.y, rect.y + rect.height): - self[j, i] += 1 - - def _remove_weight(self, rect): - for i in range(rect.x, rect.x + rect.width): - for j in range(rect.y, rect.y + rect.height): - self[j, i] -= 1 - - def _compute_weight(self, rect): - weight = 0 - - for i in range(rect.x, rect.x + rect.width): - for j in range(rect.y, rect.y + rect.height): - weight += self[j, i] - - return weight - - def __getitem__(self, (row, col)): - return self._array[col + row * self.width] - - def __setitem__(self, (row, col), value): - self._array[col + row * self.width] = value - - -class SpreadLayout(gobject.GObject, hippo.CanvasLayout): - __gtype_name__ = 'SugarSpreadLayout' - def __init__(self): - gobject.GObject.__init__(self) - - min_width, width = self.do_get_width_request() - min_height, height = self.do_get_height_request(width) - - self._grid = _Grid(width / _CELL_SIZE, height / _CELL_SIZE) - self._grid.connect('child-changed', self._grid_child_changed_cb) - - def add_center(self, child, vertical_offset=0): - self._box.append(child) - - width, height = self._get_child_grid_size(child) - rect = gtk.gdk.Rectangle(int((self._grid.width - width) / 2), - int((self._grid.height - height) / 2), - width + 1, height + 1) - self._grid.add_weight(rect) - - box_child = self._box.find_box_child(child) - box_child.grid_rect = None - box_child.vertical_offset = vertical_offset - - def add(self, child): - self._box.append(child) - - width, height = self._get_child_grid_size(child) - box_child = self._box.find_box_child(child) - self._grid.add(box_child, width, height) - - def remove(self, child): - box_child = self._box.find_box_child(child) - self._grid.remove(box_child) - - self._box.remove(child) - - def do_set_box(self, box): - self._box = box - - def do_get_height_request(self, for_width): - return 0, gtk.gdk.screen_height() - style.GRID_CELL_SIZE - - def do_get_width_request(self): - return 0, gtk.gdk.screen_width() - - def do_allocate(self, x, y, width, height, - req_width, req_height, origin_changed): - for child in self._box.get_layout_children(): - # We need to always get requests to not confuse hippo - min_w, child_width = child.get_width_request() - min_h, child_height = child.get_height_request(child_width) - - rect = child.grid_rect - if child.grid_rect: - child.allocate(rect.x * _CELL_SIZE, - rect.y * _CELL_SIZE, - rect.width * _CELL_SIZE, - rect.height * _CELL_SIZE, - origin_changed) - else: - vertical_offset = child.vertical_offset - child_x = x + (width - child_width) / 2 - child_y = y + (height - child_height + vertical_offset) / 2 - child.allocate(child_x, child_y, child_width, child_height, - origin_changed) - - def _get_child_grid_size(self, child): - min_width, width = child.get_width_request() - min_height, height = child.get_height_request(width) - - return int(width / _CELL_SIZE), int(height / _CELL_SIZE) - - def _grid_child_changed_cb(self, grid, box_child): - box_child.item.emit_request_changed() |