def __init__(self, **traits):
# This will be overriden if 'text' is provided as a trait, but it
# must be initialized if not
self._text = [ [] ]
# Initialize internal tracking variables
self.reset()
super(TextField, self).__init__(**traits)
if self.metrics is None:
self.metrics = font_metrics_provider()
# Initialize border/bg colors
self.__style_changed()
# If this can't be editted and no width has been set, make sure
# that is wide enough to display the text.
if not self.can_edit and self.width == 0:
x, y, width, height = self.metrics.get_text_extent(self.text)
offset = 2*self._style.text_offset
self.width = width + offset
def _compute_cell_sizes(self):
if not self._cache_valid:
gc = font_metrics_provider()
max_w = 0
max_h = 0
min_l = 0
min_d = 0
for text in self.string_array.ravel():
gc.set_font(self.font)
l, d, w, h = gc.get_text_extent(text)
if -l+w > max_w:
max_w = -l+w
if -d+h > max_h:
max_h = -d+h
if l < min_l:
min_l = l
if d < min_d:
min_d = d
self._cached_cell_size = (max_w, max_h)
self._text_offset = array([-min_l, -min_d])
self._cache_valid = True
return
