def stop_radialGradient(self): if len(self.stops): if self.current_gradient: if type(self.current_gradient)==ListType: self.current_gradient[1]=MultiGradient(self.stops) else: self.gradients[self.current_gradient]=MultiGradient(self.stops) self.current_gradient=0 self.stops=[]
def make_gradient_pattern(self): name, trafo, start, end = self.gradient_geo self.gradient_geo = None type, array = self.gradients[name] array = array[:] if type == 0: # linear (axial) gradient origdir = end - start start = trafo(start) end = trafo(end) dir = end - start try: # adjust endpoint to accomodate trafo v = trafo.DTransform(origdir.y, -origdir.x).normalized() v = Point(v.y, -v.x) # rotate 90 degrees end = start + (v * dir) * v dir = end - start except ZeroDivisionError: pass trafo2 = Trafo(dir.x, dir.y, dir.y, -dir.x, start.x, start.y) trafo2 = trafo2.inverse() left, bottom, right, top = trafo2(self.current_bounding_rect()) if right > left: factor = 1 / (right - left) offset = -left * factor else: factor = 1 offset = 0 array = fix_gradient(array, factor, offset) pattern = LinearGradient(MultiGradient(array), (start - end).normalized()) elif type == 1: # radial gradient start = trafo(start) end = trafo(end) left, bottom, right, top = self.current_bounding_rect() if left == right or top == bottom: # an empty coord_rect???? center = Point(0, 0) else: center = Point((start.x - left) / (right - left), (start.y - bottom) / (top - bottom)) radius = max(hypot(left - start.x, top - start.y), hypot(right - start.x, top - start.y), hypot(right - start.x, bottom - start.y), hypot(left - start.x, bottom - start.y)) if radius: factor = -abs(start - end) / radius array = fix_gradient(array, factor, 1) pattern = RadialGradient(MultiGradient(array), center) else: self.add_message(_("Unknown gradient type %d"), type) pattern = EmptyPattern return pattern
def gl(self, colors): c = [] for pos, color in colors: c.append((pos, self.convert_color(color))) self.gradient = MultiGradient(c)