+ # A generator for the colors of the channels.
+ self._colorgen = self._make_colorgen()
+
+ def _make_colorgen(self):
+ cols = [
+ QtGui.QColor(0x8F, 0x52, 0x02), # brown
+ QtGui.QColor(0xCC, 0x00, 0x00), # red
+ QtGui.QColor(0xF5, 0x79, 0x00), # orange
+ QtGui.QColor(0xED, 0xD4, 0x00), # yellow
+ QtGui.QColor(0x73, 0xD2, 0x16), # green
+ QtGui.QColor(0x34, 0x65, 0xA4), # blue
+ QtGui.QColor(0x75, 0x50, 0x7B) # violet
+ ]
+
+ def myrepeat(g, n):
+ '''Repeats every element from 'g' 'n' times'.'''
+ for e in g:
+ for f in itertools.repeat(e, n):
+ yield f
+
+ colorcycle = itertools.cycle(cols)
+ darkness = myrepeat(itertools.count(100, 10), len(cols))
+
+ for c, d in izip(colorcycle, darkness):
+ yield QtGui.QColor(c).darker(d)
+