def cell_clicked(self, pos):
''' Method runs when the user clicks on a cell in the grid.'''
from interface import singleton_interface
from resource import singleton_resource
r,c = pos
# check for building construction
if self.squares[r][c].buildable():
try:
mode = singleton_interface.get_mode()
cost = building_costs[mode]
if singleton_resource.spend(cost):
self.squares[r][c] = buildings[mode]()
except KeyError:
pass
# check for worker assigning;
if self.squares[r][c].workable():
# if we want to assign a worker, we have to have one available.
if singleton_interface.get_mode() == ASSIGN_WORKER \
and singleton_resource.get('Unemployed') >= 1 \
and self.squares[r][c].num_workers < 5:
# then use up the worker and assign it to the square
self.squares[r][c].num_workers += 1
singleton_resource.resources['Unemployed'] -= 1
if singleton_interface.get_mode() == REMOVE_WORKER \
and self.squares[r][c].num_workers > 0:
self.squares[r][c].num_workers -= 1
singleton_resource.resources['Unemployed'] += 1
# demolish a building if requested
if singleton_interface.get_mode() == DESTROY_BUILDING:
self.demolish(r,c)
def is_active(self):
''' a mode button is "active" if the interface mode is set to its mode.'''
from interface import singleton_interface
return singleton_interface.get_mode() == self.mode
