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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
from gettext import gettext as _
import gobject
import gtk
# We'd rather not depend on sugar in this class
from sugar.graphics import style
from canvas import Canvas, CanvasElement
class MindMapView(Canvas):
__gtype_name__ = 'MindMapView'
def __init__(self, model=None):
self._model = None
self._row_deleted_sid = None
self._row_inserted_sid = None
Canvas.__init__(self)
self.dragging_started.connect(self.__dragging_started_cb)
self.dragging_finished.connect(self.__dragging_finished_cb)
if model is not None:
self.model = model
def __dragging_started_cb(self, **kwargs):
x, y = kwargs['position']
logging.debug('__dragging_started_cb %r %r' % (x, y))
thought = kwargs['element']
thought.dragging = True
def __dragging_finished_cb(self, **kwargs):
x, y = kwargs['position']
thought = kwargs['element']
logging.debug('__dragging_finished_cb %r %r' % (x, y))
thought.dragging = False
thought.model.x = x
thought.model.y = y
def set_model(self, new_model):
logging.debug('set_model %r' % new_model)
if self._model == new_model:
return
if self._model is not None:
self._model.disconnect(self._row_deleted_sid)
self._model.disconnect(self._row_inserted_sid)
self._model = new_model
if self._model is not None:
self._row_deleted_sid = \
self._model.connect('row-deleted', self.__row_deleted_cb)
self._row_inserted_sid = \
self._model.connect('row-inserted', self.__row_inserted_cb)
self.remove_all_elements()
for thought_model in self._model.get_thoughts():
though_view = ThoughtView(thought_model)
self.add_element(though_view)
def get_model(self):
return self._model
model = property(get_model, set_model)
def __row_inserted_cb(self, model, path, iter):
logging.debug('__row_inserted_cb %r' % path)
thought_model = model.get_thought(path[0])
though_view = ThoughtView(thought_model)
self.add_element(though_view)
def __row_deleted_cb(self, model, path):
logging.debug('__row_deleted_cb %r' % path)
though_view = self._get_though_by_id(path[0])
self.remove_element(though_view)
def _get_though_by_id(self, thought_id):
for thought_view in self.get_elements():
if thought_view.model.id == path[0]:
return thought_view
return None
class ThoughtView(CanvasElement):
_PADDING = style.zoom(10)
def __init__(self, model):
CanvasElement.__init__(self)
self.model = model
self._last_width = -1
self._last_height = -1
self._dragging = False
self.model.changed.connect(self.__model_changed_cb)
def set_dragging(self, dragging):
if self._dragging != dragging:
self._dragging = dragging
self.invalidate()
def get_dragging(self):
return self._dragging
dragging = property(get_dragging, set_dragging)
def _get_name_layout(self, context=None):
if context is None:
visual = gtk.gdk.screen_get_default().get_system_visual()
pixmap = gtk.gdk.Pixmap(None, 1, 1, visual.depth)
context = pixmap.cairo_create()
if self.model.name is None or not self.model.name:
name = _('Unnamed')
else:
name = self.model.name
layout = context.create_layout()
layout.set_text(name)
return layout
def draw(self, context):
if self._dragging:
context.set_source_rgb(0.8, 0.8, 0.8)
else:
context.set_source_rgb(0, 0, 0)
context.save()
layout = self._get_name_layout(context)
width, height = layout.get_pixel_size()
width += self._PADDING * 2
height += self._PADDING * 2
x = self.model.x + self._PADDING
y = self.model.y + self._PADDING
context.translate(x, y)
context.show_layout(layout)
context.restore()
context.save()
context.set_line_width(4)
context.rectangle(self.model.x, self.model.y, width, height)
context.stroke()
context.restore()
self._last_width = width
self._last_height = height
CanvasElement.draw(self, context)
def get_size(self):
return self._last_width, self._last_height
def __model_changed_cb(self, **kwargs):
self.x = self.model.x
self.y = self.model.y
self.invalidate()
def get_rect(self):
if -1 in (self._last_width, self._last_height):
layout = self._get_name_layout()
width, height = layout.get_pixel_size()
self._last_width = width + self._PADDING * 2
self._last_height = height + self._PADDING * 2
return gtk.gdk.Rectangle(self.model.x, self.model.y,
self._last_width, self._last_height)
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