def fract_from_image(self,
pos: ImagePixelCoordinate) -> FractionalImagePos:
img = self.image.image
img_size = (1, 1)
if img:
img_size = (img.width, img.height)
return FractionalImagePos.from_ImagePixelCoordinate(pos, img_size)
def size(self, value: ImagePixelCoordinate):
ipc2 = ImagePixelCoordinate(0, 0)
img_size = self.images[0].size()
fips = [
FractionalImagePos.from_ImagePixelCoordinate(pos, img_size)
for pos in (value, ipc2)
]
xform = self.images[0].transform
cps = [CanvasPos.from_FractionalImagePos(pos, xform) for pos in fips]
width = abs(cps[1].x - cps[0].x)
height = abs(cps[1].y - cps[0].y)
self.right = 0.5 * width
self.left = -self.right
self.bottom = 0.5 * height
self.top = -self.bottom