coverart-browser/em_8py_source.html

00001 import gi
00002 from gi.repository import Pango
00003 from gi.repository import Gtk
00004
00005 gi.require_version("Gtk", "3.0")
00006
00007 import logging
00008
00009 LOG = logging.getLogger(__name__)
00010
00011
00012 def get_em(size=""):
00013     # calc the height of a character, use as 1em
00014     if size:
00015         m = '<%s>M</%s>' % (size, size)
00016     else:
00017         m = 'M'
00018
00019     l = Gtk.Label()
00020     l.set_markup(m)
00021     w, h = l.get_layout().get_size()
00022     return h / Pango.SCALE
00023
00024
00025 def get_small_em():
00026     return get_em("small")
00027
00028
00029 def get_big_em():
00030     return get_em("big")
00031
00032
00033 EM = get_em()
00034 SMALL_EM = get_small_em()
00035 BIG_EM = get_big_em()
00036 LOG.debug("EM's: %s %s %s" % (EM, SMALL_EM, BIG_EM))
00037
00038
00039 def em(multiplier=1, min=1):
00040     return max(int(min), int(round(EM * multiplier, 0)))
00041
00042
00043 def small_em(multiplier=1, min=1):
00044     return max(int(min), int(round(SMALL_EM * multiplier, 0)))
00045
00046
00047 def big_em(multiplier=1, min=1):
00048     return max(int(min), int(round(BIG_EM * multiplier, 0)))
00049
00050
00051 # common values
00052 class StockEms:
00053     XLARGE = em(1.33, 5)
00054     LARGE = em(min=3)
00055     MEDIUM = em(0.666, 2)
00056     SMALL = em(0.333, 1)