def write_text(self):
if not self.text:
# Nothing useful to draw, return now!
return
if self.resized(
) or self.text != self.prev_text or self.text_overlay is None:
# Need to recreate the cache drawing
self.text_overlay = ImageSurface(FORMAT_ARGB32, self.width,
self.height)
ctx = Context(self.text_overlay)
pg = CairoContext(ctx)
pl = pg.create_layout()
pl.set_font_description(self.text_font)
pl.set_width(-1) # No text wrapping
pl.set_text(self.text)
plsize = pl.get_size()
text_width = plsize[0] // SCALE
text_height = plsize[1] // SCALE
area_width_without_text = self.width - text_width
area_height_without_text = self.height - text_height
ctx.move_to(area_width_without_text // 2,
area_height_without_text // 2)
ctx.set_source_rgb(1, 1, 1)
pg.update_layout(pl)
pg.show_layout(pl)
self.cr.set_source_surface(self.text_overlay)
self.cr.paint()
