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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.GenericTreeModel):
_COLUMN_TYPES = (str, str, long, long, str)
def __init__(self):
gobject.GObject.__init__(self)
self._next_thought_id = 0
self._thoughts_by_id = {}
self._thoughts = []
def create_new_thought(self):
thought = Thought(self._next_thought_id)
self._add_thought(thought)
def _add_thought(self, thought):
thought.changed.connect(self.__thought_changed_cb)
self._thoughts.append(thought)
self._thoughts_by_id[thought.id] = thought
self._next_thought_id += 1
path = (thought.id,)
self.row_inserted(path, self.get_iter(path))
def get_thought(self, thought_id):
return self._thoughts_by_id[int(thought_id)]
def __thought_changed_cb(self, **kwargs):
thought = kwargs['sender']
path = (thought.id,)
self.row_changed(path, self.get_iter(path))
def get_thoughts(self):
return self._thoughts
def serialize(self):
thoughts = []
for thought in self._thoughts:
thought_dict = {}
thought_dict['id'] = thought.id
thought_dict['name'] = thought.name
thought_dict['x'] = thought.x
thought_dict['y'] = thought.y
thought_dict['color'] = thought.color
thoughts.append(thought_dict)
return cjson.encode({'thoughts': thoughts})
def unserialize(self, data):
thoughts = cjson.decode(data)['thoughts']
for thought_dict in thoughts:
thought = Thought(thought_dict['id'])
thought.name = thought_dict.get('name', None)
thought.x = thought_dict.get('x', None)
thought.y = thought_dict.get('y', None)
thought.color = thought_dict.get('color', None)
self._add_thought(thought)
# gtk.GenericTreeModel methods
# paths and rowrefs are the thought ids
def on_get_flags(self):
return gtk.TREE_MODEL_ITERS_PERSIST
def on_get_n_columns(self):
return len(self._COLUMN_TYPES)
def on_get_column_type(self, n):
return self._COLUMN_TYPES[n]
def on_get_iter(self, path):
logging.debug('on_get_iter %r %r' % (type(path), path))
if path[0] in self._thoughts_by_id:
return path[0]
else:
return None
def on_get_path(self, rowref):
logging.debug('on_get_path %r' % rowref)
return (rowref,)
def on_get_value(self, rowref, column):
#logging.debug('on_get_value %r %r' % (rowref, column))
if rowref >= len(self._thoughts):
return None
thought = self._thoughts[rowref]
value_tuple = thought.get_tuple()
return value_tuple[column]
def on_iter_next(self, rowref):
#logging.debug('on_iter_next %r' % rowref)
if rowref not in self._thoughts_by_id:
return None
thought = self._thoughts_by_id[rowref]
index = self._thoughts.index(thought)
if index + 1 >= len(self._thoughts):
return None
next_thought = self._thoughts[index + 1]
#logging.debug('on_iter_next returning %r' % next_thought.id)
return next_thought.id
def on_iter_children(self, rowref):
logging.debug('on_iter_children %r' % rowref)
if rowref:
return None
if self._thoughts:
return self._thoughts[0].id
else:
return None
def on_iter_has_child(self, rowref):
return False
def on_iter_n_children(self, rowref):
logging.debug('on_iter_n_children %r' % rowref)
if rowref:
return 0
return len(self._thoughts)
def on_iter_nth_child(self, rowref, n):
logging.debug('on_iter_nth_child %r %r' % (rowref, n))
if rowref is not None:
return None
if n < len(self._thoughts):
return self._thoughts[n].id
def on_iter_parent(child):
return None
class Thought(object):
def __init__(self, thought_id, name=None, x=0, y=0, color=None):
if thought_id is None:
raise ValueError('thought_id cannot be None')
self._id = thought_id
self._name = name
self._x = x
self._y = y
self._color = color
self.changed = dispatch.Signal()
def get_tuple(self):
return (self.id, self.name, self.x, self.y, self.color)
def set_id(self, new_id):
if self._id == new_id:
return
self._id = new_id
self.changed.send(self)
def get_id(self):
return self._id
id = property(get_id, set_id)
def set_name(self, new_name):
if self._name == new_name:
return
self._name = new_name
self.changed.send(self)
def get_name(self):
return self._name
name = property(get_name, set_name)
def set_x(self, new_x):
if self._x == new_x:
return
self._x = new_x
self.changed.send(self)
def get_x(self):
return self._x
x = property(get_x, set_x)
def set_y(self, new_y):
if self._y == new_y:
return
self._y = new_y
self.changed.send(self)
def get_y(self):
return self._y
y = property(get_y, set_y)
def set_color(self, new_color):
if self._color == new_color:
return
self._color = new_color
self.changed.send(self)
def get_color(self):
return self._color
color = property(get_color, set_color)
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