def fetch_thumbnail(filename, size=Gst.get_int('thumbnail-size')):
"""Load a photo's thumbnail from disk, avoiding EXIF data if possible.
>>> fetch_thumbnail('gg/widgets.py')
Traceback (most recent call last):
IOError: gg/widgets.py: The file contains data of an unknown image type
>>> type(fetch_thumbnail('demo/IMG_2411.JPG'))
<class 'gi.repository.GdkPixbuf.Pixbuf'>
"""
#TODO: The above IOError is raise by pyexiv2 in fetch_exif,
# I need to find a file that pyexiv2 thinks is an image, but has
# no thumbnail and thus raises IOError here anyway.
try:
return GdkPixbuf.Pixbuf.new_from_file_at_size(filename, size, size)
except GObject.GError:
exif = fetch_exif(filename)
if len(exif.previews) > 0:
data = exif.previews[-1].data
elif len(exif.exif_thumbnail.data) > 0:
data = exif.exif_thumbnail.data
else:
raise IOError('%s: No thumbnail found.' % filename)
return GdkPixbuf.Pixbuf.new_from_stream_at_scale(
Gio.MemoryInputStream.new_from_data(data, None),
size, size, True, None)
def animate_in(anim=True):
"""Fade in all the map actors."""
for i in xrange(Gst.get_int('animation-steps') if anim else 1, 0, -1):
for actor in (Crosshair, Box, Scale):
actor.set_opacity(256 - i)
Widgets.redraw_interface()
sleep(0.01)
