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# Copyright (C) 2009, Tomeu Vizoso
#
# 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 logging
import gobject
import gtk
import cjson
from sugar import dispatch
class MindMapModel(gtk.TreeStore):
def __init__(self):
gtk.TreeStore.__init__(self, int, str, long, long, str)
self._next_thought_id = 0
self._thoughts_by_id = {}
self._thoughts = []
def create_new_thought(self, name='', x=0, y=0, color='', parent_id=None):
thought_id = self._next_thought_id
parent = None
if parent_id is not None:
parent = self.find_by_id(parent_id).iter
self.append(parent, (thought_id, name, x, y, color))
self._next_thought_id += 1
return thought_id
def _serialize_thoughts(self, rows):
thoughts = []
for row in rows:
thought_dict = {}
thoughts.append(thought_dict)
thought_dict['id'] = row[0]
thought_dict['name'] = row[1]
thought_dict['x'] = row[2]
thought_dict['y'] = row[3]
thought_dict['color'] = row[4]
children = self._serialize_thoughts(row.iterchildren())
thought_dict['children'] = children
return thoughts
def serialize(self):
return cjson.encode({'thoughts': self._serialize_thoughts(self)})
def unserialize(self, data):
thoughts = cjson.decode(data)['thoughts']
self._unserialize_thoughts(parent=None, thoughts=thoughts)
def _unserialize_thoughts(self, parent, thoughts):
for thought_dict in thoughts:
self._next_thought_id = max(self._next_thought_id + 1,
thought_dict['id'] + 1)
new_row = self.append(parent, (thought_dict['id'],
thought_dict.get('name', None),
thought_dict.get('x', None),
thought_dict.get('y', None),
thought_dict.get('color', None)))
children = thought_dict.get('children', [])
self._unserialize_thoughts(parent=new_row, thoughts=children)
def find_by_id(self, thought_id, rows=None):
if rows is None:
rows = self
for row in rows:
if row[0] == thought_id:
return row
children = row.iterchildren()
found_row = self.find_by_id(thought_id, children)
if found_row is not None:
return found_row
return None
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