/usr/share/GvRng/GvrController.py is in gvrng 4.4-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Copyright (c) 2007 Stas Zykiewicz <stas.zytkiewicz@gmail.com>
#
# GvrController.py
# This program is free software; you can redistribute it and/or
# modify it under the terms of version 3 of the GNU General Public License
# as published by the Free Software Foundation. A copy of this license should
# be included in the file GPL-3.
#
# 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 Library 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
"""
This is a controller from a MVC pattern and 'talks' to GvrModel and a view.
"""
import sys,time
from utils import trace_error
import logging
class Controller:
"""This is the controller (mvc).
It controls GvrModel.py and a view, the view can be any module which provides
the methods marked 'View' in the file describing this controller.
This file is called 'Guidelines_for_View.txt'. You should look at this file
if you are planning a different view. Also be sure to check the
'Guidelines_for_main.txt' on how to start these modules.(yet to be written)
"""
def __init__(self,model,view):
"""Get a reference to the model and view objects.
The controller uses these to call their methods.
All controller methods return False on faillure, anything else means
success."""
self.logger = logging.getLogger("gvr.GvrController.Controller")
self.View = view
self.Model = model
def start_view(self,*args):
"""This ask the view to build/start it's GUI. The view must start an
eventloop of some sort otherwise the controller stops here."""
self.logger.debug("start view")
self.View.start(args)
return True
def quit(self):
"""Stops the view and the model by calling their 'stop' methods.
Then wait for one second to let every procces stop and return to the
'main' from where were started."""
try:
self.logger.debug("Stopping Guido van Robot...")
self.View.stop()
except:
trace_error()
pass
try:
self.Model.stop()
time.sleep(1)
self.logger.debug("Done")
except:
self.logger.exception("Failed to quit properly")
pass
return True
### View callbacks
def on_button_execute(self):
"""Called by the view when the execute button is pressed.
This will call model.on_code_execute().
The model looks for world and program code by calling c.get_*win_text.
The model also calls c.give_error in case of an error."""
#self.View.statusbar.set_mesg("Button 'Execute' pressed")# for testing only
self.logger.debug("button execute")
self.Model.on_code_execute()
return True
def on_button_reload(self,worldcode):
"""Called by the view when the reload button is pressed.
This will call model.on_world_reload().
The model will notify the controller.world_state_changed method
or call c.give_error on any error."""
self.logger.debug("button reload")
self.Model.on_world_reload(worldcode)
return True
def on_button_step(self):
"""Called by the view when the step button is pressed.
This will call model.on_button_step()."""
self.logger.debug("button step")
self.Model.wakeUp()
return True
def on_button_abort(self):
"""Called by the view when the abort button is pressed.
This will call model.on_abort()."""
self.logger.debug("button abort")
self.Model.stopRobot()
return True
def get_robot_position(self):
"""Called by the view
Return the position of the robot in the logic world as a tuple or None"""
#self.logger.debug("get_robot_position")
return self.Model.get_position()
def get_robot_beepers(self):
"""Called by the view.
Returns the number of beepers the robot is carrying as integer or None."""
#self.logger.debug("get_robot_beepers")
return self.Model.get_beepers()
## Model callbacks
def get_worldwin_text(self):# XXX not sure we need this
"""Called by the model and controller.
This will call View.worldwin_gettext()."""
txt = self.View.worldwin_gettext()
if txt:
return txt
else:
return ''
def get_codewin_text(self):
"""Called by the model.
This will call View.codewin_gettext()."""
txt = self.View.codewin_gettext()
if txt:
return txt
else:
return ''
def setLine(self,line):
"""Called by the stepper as the model passes this object"""
self.View.highlight_line_code_editor(line)
def get_timer(self):
return self.View.get_timer()
def get_timer_interval(self):
return self.View.get_timer_interval()
def give_warning(self,txt):
"""Called by the model.
This will call View.show_warning(txt)."""
self.View.show_warning(txt)
return True
def give_error(self,txt):
"""Called by the model.
This will call View.show_error(txt)."""
self.View.show_error(txt)
return True
def give_info(self,txt):
"""Called by the model.
This will call View.show_info(txt)."""
self.View.show_info(txt)
return True
def world_state_changed(self,obj):
"""Called by the model.
This will inform the view that the state of the world is changed.
(robot is moved)
This will call View.update_world(obj)
@obj is a gvr logical world object"""
#self.logger.debug("world_state_changed called")
self.View.update_world(obj)
return True
def world_robot_state_changed(self,obj,oldcoords=None):
"""Called by the model from updateWorldBitmapAfterMove when stepper
stepped"""
#self.logger.debug("world_robot_state_changed called")
self.View.update_robot_world(obj,oldcoords)
return True
def world_beepers_state_changed(self,obj):
"""Idem as world_robot_state_changed"""
#self.logger.debug("world_beepers_state_changed called")
self.View.update_beepers_world(obj)
return True
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