def test_canvas_widget(size, offset, anchor):
'''
Place widgets and verify position
'''
w = text('X')
ri = w.render()[0]
img = Image.new('1', size, 0)
drw = ImageDraw.Draw(img)
fnt = w.font
if anchor and offset:
c = canvas(size=size, placements=((w, offset, anchor), ))
elif offset:
c = canvas(size=size, placements=((w, offset), ))
else:
c = canvas(size=size, placements=((w, ), ))
pos = compute_placement(size, fnt.getsize('X'), offset, anchor)
drw.text( pos, 'X', font=fnt, fill='white')
assert c.render()[0] == img, f'Placing \'X\' on {size} canvas at {offset} anchored {anchor} failed'
img = Image.new('1', size, 0)
drw = ImageDraw.Draw(img)
c = canvas(size=size)
c.append(w, offset, anchor)
drw.text( pos, 'X', font=fnt, fill='white')
assert c.render()[0] == img, f'Placing \'X\' by append on {size} canvas at {offset} anchored {anchor} failed'
def _make_scroll(val, size, distance=1, speed=1):
w = text(value=val)
sw = scroll(size=size,
widget=w,
actions=[('rtl')],
distance=distance,
speed=speed,
tps=60)
return sw
def _slide(actions):
w = text(value='This is a test!')
sw = slide(size=(100, 16),
widget=w,
just='mm',
actions=actions,
speed=1,
tps=60)
return sw
def test_string_eval():
s = 'abc'
w = text(value=s)
img1 = w.render()[0]
drw = ImageDraw.Draw(img1)
img2 = Image.new('1', drw.textsize(s, font=w.font))
drw = ImageDraw.Draw(img2)
drw.text((0, 0), s, font=w.font, fill='white')
assert img1 == img2, f'Images do not match for value {w.current}'
def test_request_size():
s = 'abc'
w = text('abc', size=(10, 8))
img1 = w.render()[0]
drw = ImageDraw.Draw(img1)
img2 = Image.new('1', (10, 8))
drw = ImageDraw.Draw(img2)
drw.text((0, 0), s, font=w.font, fill='white')
assert img1 == img2, f'Image should only contain \'ab\''
db = {'value': s}
w = text(value='f"{db[\'value\']}"', dataset={'db': db}, size=(10, 8))
w.render()[0]
db['value'] = s[0]
img1 = w.render()[0]
img2 = Image.new('1', (10, 8))
drw = ImageDraw.Draw(img2)
drw.text((0, 0), s[0], font=w.font, fill='white')
assert img1 == img2, f'Image should still only contain \'ab\''
def test_canvas_widget_change():
db = {'artist': 'Sting'}
w = text(value='f"Artist {db[\'artist\']}"', dataset = { 'db': db }, size=(60,8))
c = canvas(size=(80,16))
c.append(w)
img, m1 = c.render()
img, m2 = c.render()
db['artist'] = 'Moby'
img, m3 = c.render()
assert m1 and m3 and not m2
def test_image_placement():
# Make H
hImg = Image.new('1', (5, 8))
d = ImageDraw.Draw(hImg)
d.line([(0, 1), (0, 7)], fill='white')
d.line([(4, 1), (4, 7)], fill='white')
d.line([(0, 4), (4, 4)], fill='white')
w = text(value='H', size=(100, 16), just='rt')
renderImage = w.render()[0]
for size in [(100, 16), (99, 15), (20, 8), (19, 8)]:
for j in ['lt', 'lm', 'lb', 'mt', 'mm', 'mb', 'rt', 'rm', 'rb']:
offsetH = {'r': size[0] - 5, 'l': 0, 'm': round((size[0] - 5) / 2)}
offsetV = {'b': size[1] - 8, 't': 0, 'm': round((size[1] - 8) / 2)}
w = text(value='H', size=size, just=j)
renderImage = w.render()[0]
img = Image.new('1', size)
img.paste(hImg, (offsetH[j[0]], offsetV[j[1]]))
bbox = ImageChops.difference(img, renderImage).getbbox()
assert not bbox, f'Place {j[0]},{j[1]} failed at size {size}'
def test_text_widget():
path = Path(__file__).parent / "reference/images/text_artist_sting_60x8.png"
img = Image.open(path).convert('1')
db = {'artist': 'Sting'}
w = text(value='f"Artist {db[\'artist\']}"', dataset = { 'db': db }, size=(60,8))
renderImage = w.render()[0]
bbox = ImageChops.difference(img, renderImage).getbbox()
assert not bbox, f'Sting image did not match'
path = Path(__file__).parent / "reference/images/text_artist_new_republic_60x8.png"
img = Image.open(path).convert('1')
db['artist']='New Republic'
renderImage = w.render()[0]
bbox = ImageChops.difference(img, renderImage).getbbox()
assert not bbox, f'New Republic image did not match'