def make_pg_image_item(image, extent=None, **kwargs):
if image is None:
return None
image_args = kwargs
image_args.setdefault('autoRange', False)
image_args.setdefault('autoLevels', False)
image_args.setdefault('axisOrder', 'row-major')
image_args.setdefault('levels', levels_for(image))
item = ImageItem(image, **image_args)
if extent is not None:
xmin, xmax, ymin, ymax = extent
item.setRect(QRectF(QPointF(xmin, ymin), QPointF(xmax, ymax)))
item.setAutoDownsample(True)
return item
def image_in_vb(self, name=None):
im = ImageItem()
im.setAutoDownsample(False)
vb = ViewBox(invertY=True, lockAspect=True, name=name)
vb.addItem(im)
return im, vb
