def test_howto_example_drawing_line(self):
"""tests the third canvas example from howto"""
test_image = get_image("canvas_3.png")
o = get_mock_output()
c = Canvas(o, name=c_name)
c.line((10, 4, "-8", "-4"))
assert(imgs_are_equal(c.get_image(), test_image))
def get_yes_icon(width=40, height=40):
o = MockOutput(width, height)
c = Canvas(o)
cx, cy = c.get_center()
c.circle((cx, cy, min(width / 2, height / 2) - 1), fill="white")
c.line((cx - 15, cy, cx, cy + 15), fill="black", width=5)
c.line((cx - 1, cy + 15, cx + 10, cy - 12), fill="black", width=4)
return c.get_image()
def refresh(self):
c = Canvas(self.o)
charwidth = 20
charheight = 32
font = c.load_font("Fixedsys62.ttf", charheight)
pin_width = len(self.pin) * charwidth
x_offset = (self.o.width - pin_width) / 2
y_offset = 15
c.line((x_offset, y_offset + charheight, str(-x_offset),
y_offset + charheight))
c.line((x_offset, y_offset + charheight, x_offset,
y_offset + charheight - 5))
for x in range(len(self.pin)):
i = x + 1
if x in range(len(self.value)):
c.text("*", (x_offset + charwidth * x, y_offset), font=font)
c.line((x_offset + charwidth * i, y_offset + charheight,
x_offset + charwidth * i, y_offset + charheight - 5))
self.o.display_image(c.get_image())
def test_screen(self):
# Testing the screen - drawing a "crosshair" to test screen edges and lines
c = Canvas(self.o)
c.line((0, 0, 10, 0))
c.line(("-1", 0, "-10", 0))
c.line((0, "-1", 10, "-1"))
c.line(("-1", "-1", "-10", "-1"))
c.line((0, 0, 0, 10))
c.line((0, "-1", 0, "-10"))
c.line(("-1", 10, "-1", 0))
c.line(("-1", "-1", "-1", "-10"))
c.line((0, 0, "-1", "-1"))
c.line((0, "-1", "-1", 0))
eh = ExitHelper(self.i, ["KEY_ENTER", "KEY_LEFT"]).start()
c.display()
sleep(1)
for x in range(30):
if eh.do_run():
if x % 10 == 0:
c.invert()
c.display()
sleep(0.1)
else:
break
# Filling the screen (still using the same ExitHelper)
c = Canvas(self.o)
for x in range(60):
if eh.do_run():
if x % 20 == 0:
c.invert()
c.display()
sleep(0.1)
else:
break