1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
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()
|
