~jconti/recent-notifications/trunk

"""

Icon.py

by Jason Conti

February 22, 2010

updated: March 26, 2011

Utility functions for working with icons.

"""

import gc

from gi.repository import GdkPixbuf, Gtk

import logging

icon_cache = {}

logger = logging.getLogger("Icon")

def clear_cache():

  """Clear the icon cache, garbage collecting all the icons."""

  global icon_cache

  for key, icon in icon_cache:

    del icon

  icon_cache = {}

  gc.collect()

def load(name, size = 48):

  """Loads an icon from the default icon theme."""

  global icon_cache

  if (name, size) in icon_cache:

    return icon_cache[(name, size)]

  else:

    try:

      theme = Gtk.IconTheme.get_default()

      icon = theme.load_icon(name, size, Gtk.IconLookupFlags.FORCE_SVG)

      icon_cache[(name, size)] = icon

      return icon

    except:

      logger.exception("failed to load_icon")

      return None

def load_from_file(path, size = 48):

  """Loads an icon from the given path."""

  global icon_cache

  if (path, size) in icon_cache:

    return icon_cache[(path, size)]

  else:

    try:

      icon = GdkPixbuf.Pixbuf.new_from_file_at_size(path, size, size)

      icon_cache[(path, size)] = icon

      return icon

    except:

      logger.exception("failed to load_icon_from_file")

      return None