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Diffstat (limited to 'src/jarabe/desktop/spreadlayout.py')
-rw-r--r-- | src/jarabe/desktop/spreadlayout.py | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/src/jarabe/desktop/spreadlayout.py b/src/jarabe/desktop/spreadlayout.py new file mode 100644 index 0000000..b5c623e --- /dev/null +++ b/src/jarabe/desktop/spreadlayout.py @@ -0,0 +1,89 @@ +# Copyright (C) 2007 Red Hat, Inc. +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program 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 General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + +import math + +import hippo +import gobject +import gtk + +from sugar.graphics import style + +from jarabe.desktop.grid import Grid + + +_CELL_SIZE = 4.0 + + +class SpreadLayout(gobject.GObject, hippo.CanvasLayout): + __gtype_name__ = 'SugarSpreadLayout' + + def __init__(self): + gobject.GObject.__init__(self) + self._box = None + + min_width, width = self.do_get_width_request() + min_height, height = self.do_get_height_request(width) + + self._grid = Grid(int(width / _CELL_SIZE), int(height / _CELL_SIZE)) + self._grid.connect('child-changed', self._grid_child_changed_cb) + + def add(self, child): + self._box.append(child) + + width, height = self._get_child_grid_size(child) + self._grid.add(child, width, height) + + def remove(self, child): + self._grid.remove(child) + self._box.remove(child) + + def move(self, child, x, y): + self._grid.move(child, x / _CELL_SIZE, y / _CELL_SIZE, locked=True) + + 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 = self._grid.get_child_rect(child.item) + child.allocate(int(round(rect.x * _CELL_SIZE)), + int(round(rect.y * _CELL_SIZE)), + 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) + width = math.ceil(width / _CELL_SIZE) + height = math.ceil(height / _CELL_SIZE) + + return int(width), int(height) + + def _grid_child_changed_cb(self, grid, child): + child.emit_request_changed() |