def _draw(self, name, pad, outside=False):
cr.rectangle(100, 100, 400, 100)
cr.stroke()
cr.save()
cr.set_line_width(0.5)
cr.set_source_rgba(0.0, 0.0, 0.0, 0.5)
dd = 50 if outside else 2
cr.move_to(100 - dd, 150)
cr.line_to(500 + dd, 150)
cr.move_to(300, 100 - dd)
cr.line_to(300, 200 + dd)
cr.stroke()
cr.restore()
if any(pad):
cr.save()
cr.set_line_width(0.75)
cr.set_source_rgba(1.0, 0.0, 0.0, 0.5)
sign = -1 if outside else 1
cr.rectangle(100 + sign * pad[3],
100 + sign * pad[0],
400 - sign * (pad[1] + pad[3]),
100 - sign * (pad[0] + pad[2]))
cr.stroke()
cr.restore()
style = Style()
style.size = Size(400, 100)
style.pos = Pos(100, 100)
style.padding = Area(*pad)
dt = partial(draw_text, cr, style.size, style, outside=outside)
dt('(CENTRAL)', align=(0, 0))
dt('(TOP)', align=(0, -1))
dt('(BOTTOM)', align=(0, 1))
dt('(LEFT)', align=(-1, 0))
dt('(RIGHT)', align=(1, 0))
dt('(L-TOP)', align=(-1, -1))
dt('(R-TOP)', align=(1, -1))
dt('(L-BOTTOM)', align=(-1, 1))
dt('(R-BOTTOM)', align=(1, 1))
cr.show_page()
def _draw(self, name, line, pad):
cr.rectangle(line[0].x - 3, line[0].y - 3, 6, 6)
for p1, p2 in zip(line[:-1], line[1:]):
cr.move_to(*p1)
cr.line_to(*p2)
cr.arc(p2.x, p2.y, 1, 0.0, 2.0 * pi)
cr.stroke()
cr.save()
cr.set_line_width(0.75)
cr.set_source_rgba(1.0, 0.0, 0.0, 0.5)
p1, p2 = line_middle_segment(line)
x0 = p1.x + (p2.x - p1.x) / 2
y0 = p1.y + (p2.y - p1.y) / 2
cr.move_to(x0 - 40, y0)
cr.line_to(x0 + 40, y0)
cr.move_to(x0, y0 - 40)
cr.line_to(x0, y0 + 40)
cr.stroke()
cr.restore()
style = Style()
style.size = Size(0, 0)
style.pos = Pos(0, 0)
style.padding = pad
def dt(text, valign):
lt = '(L {})'.format(text)
rt = '(R {})'.format(text)
draw_text(cr, line, style, lt, align=(ALIGN_LEFT, valign), align_f=text_pos_at_line)
draw_text(cr, line, style, rt, align=(ALIGN_RIGHT, valign), align_f=text_pos_at_line)
dt('TAIL', ALIGN_TAIL)
dt('HEAD', ALIGN_HEAD)
dt('MID', ALIGN_MIDDLE)
cr.show_page()