def __set_file(self, val):
self.__uri = val
try:
self.__fd = vfs.open(self.__uri, OPEN_READ)
except:
raise IOError("Could not open file %s." % (self.__uri))
self._update("uri")
def preview(self, filename):
loader = gtk.gdk.PixbufLoader()
try:
fd = vfs.open(filename)
data = fd.read(3 * 1024 * 1024) # read a maximum of 3 MB
fd.close()
loader.write(data, len(data))
except:
try:
loader.close()
except:
pass
return False
try:
loader.close()
except:
return False
pbuf = loader.get_pixbuf()
if pbuf == None:
return False
# scale image down while preserving aspect ratio
width = pbuf.get_width()
height = pbuf.get_height()
if width > 180:
scale = 180 / float(width)
height *= scale
height = max(1, height)
if abs(scale - 1.0) > 0.001:
pbuf = pbuf.scale_simple(180, int(height), 3)
self.__img.set_size_request(180, -1)
self.__img.set_from_pixbuf(pbuf)
self.__img.set_size_request(180, -1)
del pbuf
import gc
gc.collect()
return True
