def draw_tn_image(self, tn_image):
self.clear_area(self.pic_space)
if tn_image:
parea = ut.center_size_in_area(self.pic_space, tn_image.size)
tgtoff = (parea[0], parea[1])
self.image.blit(image = tn_image, target = tgtoff)
self.redraw(self.pic_space)
def compute_layout(self):
"""
If "self.image" should be replaced with one of different
dimensions, this method is to be called to compute the new
layout.
"""
self.area = (0, 0, self.image.size[0], self.image.size[1])
tlx, tly, brx, bry = self.area
#print repr(self.area)
area_sz = ut.area_size(self.area)
margin = 10
fn_height = area_sz[1] / 5 - margin
self.fn_area = (tlx, bry - fn_height, brx, bry)
#print repr(self.fn_area)
arrow_w = (area_sz[0] - self.tn_width) / 2
arrow_size = (arrow_w - (2 * margin), arrow_w - (2 * margin))
pic_tlx = tlx + arrow_w
self.pic_space = (pic_tlx, tly,
pic_tlx + self.tn_width, bry - fn_height)
#print repr((self.tn_width, self.pic_space))
larr_space = (tlx, tly,
tlx + arrow_w, bry - fn_height)
#print repr(larr_space)
larr_area = ut.center_size_in_area(larr_space, arrow_size)
#print repr(larr_area)
self.left_arrow = Arrow(self.image, larr_area, left_arrow_coordseq)
rarr_space = (brx - arrow_w, tly,
brx, bry - fn_height)
#print repr(rarr_space)
rarr_area = ut.center_size_in_area(rarr_space, arrow_size)
#print repr(rarr_area)
self.right_arrow = Arrow(self.image, rarr_area, right_arrow_coordseq)
