def _update_background(self, *_):
#print "updating background"
conn = self.connection
rp = self._root_pixmap()
if rp is not None:
conn.core.CopyArea(rp,
self.back_pixmap,
self._gc,
self.x, self.y,
0,0,
self.width, self.height)
self.set_source(self._back_cairo_c, self.bg, self.shading, self.height)
cawc.cairo_set_line_width(self._back_cairo_c, 4)
cawc.cairo_rectangle(self._back_cairo_c, 0, 0, self.width, self.height);
cawc.cairo_fill(self._back_cairo_c)
i = 0
r,g,b = self.rgb(self.border)
cawc.cairo_set_line_width(self._back_cairo_c, 1.0)
cawc.cairo_set_source_rgba(self._back_cairo_c, r, g, b, 1.0)
while i < self.border_width:
cawc.cairo_rectangle(self._back_cairo_c, i, i, self.width-2*i-1, self.height-2*i-1);
cawc.cairo_stroke(self._back_cairo_c)
i+=1
def set_source(self, cairo, color, shading, height):
a = shading / 255.
if isinstance(color, tuple) or isinstance(color, list):
pattern = cawc.cairo_pattern_create_linear(0,0,0,height)
step = float(height) / (len(color) - 1)
cur = 0
for color in self.bg:
r,g,b = self.rgb(color)
cawc.cairo_pattern_add_color_stop_rgba(pattern, cur, r, g, b, a)
cur += step
cawc.cairo_set_source(cairo, pattern)
cawc.cairo_pattern_destroy(pattern)
else:
r,g,b = self.rgb(color)
cawc.cairo_set_source_rgba(cairo, r, g, b, a)
