def _get_empty_cells(self, dc, grid, key, text_pos, text_extent):
"""Generator of empty cells from key in direction
Parameters
----------
key: 3-tuple of Integer
\tCurrent cell
text_pos: 3-tuple
\tPosition and direction of text
"""
row, col, tab = key
blocking_distance = None
textbox = self.get_text_rotorect(text_pos, text_extent)
for distance, __row, __col in grid.colliding_cells(row, col, textbox):
if blocking_distance is None or distance == blocking_distance:
if self.data_array[__row, __col, tab] is not None and \
self.data_array[__row, __col, tab] != "":
blocking_distance = distance
else:
yield __row, __col, tab
def _get_full_cells(self, dc, grid, key, text_pos, text_extent):
"""Generator of full cells from key in direction
Parameters
----------
key: 3-tuple of Integer
\tCurrent cell
text_pos: 3-tuple
\tPosition and direction of text
"""
row, col, tab = key
blocking_distance = None
textbox = self.get_text_rotorect(text_pos, text_extent)
for distance, __row, __col in grid.colliding_cells(row, col, textbox):
# Draw blocking arrows if locking cell is not empty
if not(
(blocking_distance is None or distance == blocking_distance)
and not self.data_array[__row, __col, tab]):
yield __row, __col, tab