[39]Indicating

class IndicatingTest(Scene):
    def construct(self):
        self.indicating()     

    def indicating(self):
        ani_classes = {
            "ShowCreationThenDestruction": (ShowCreationThenDestruction,),
            "Indicate": (Indicate, ),
            "WiggleOutThenIn": (WiggleOutThenIn,),
            "ApplyWave": (ApplyWave, ),
        }

        ani_classes_need_pre_exist={
            "CircleIndicate": (CircleIndicate,),
            "FocusOn": (FocusOn,),
            "Flash": (Flash,),
            "ShowPassingFlashAround": (ShowPassingFlashAround,),
            "ShowCreationThenDestructionAround": (ShowCreationThenDestructionAround,),
            "ShowCreationThenFadeAround": (ShowCreationThenFadeAround,),
            "ShowPassingFlash": (ShowPassingFlash,),
            "AnimationOnSurroundingRectangle": (AnimationOnSurroundingRectangle,),
        }

        idx = 1
        for name, ani in ani_classes.items():
            self.do_ani(idx, name, ani)
            idx += 1

        #need to existing mobject prior to play animation
        for name, ani in ani_classes_need_pre_exist.items():
            self.do_ani(idx, name, ani, need_prior=True)
            idx += 1

    def do_ani(self, idx, ani_name, ani, obj=None, need_prior=False):
        def get_obj():
            text = TextMobject("Hello. This is animation test")
            circle1 = Circle(radius=1)
            circle2 = Circle(radius=1, fill_color=YELLOW, fill_opacity=1)
            circles = VGroup(circle1, circle2)

            dot = Dot()
            arrow = Arrow(LEFT, RIGHT, stroke_width=5).set_width(3)
            dot.next_to(arrow, LEFT, buff=0.5)
            dot_arrow = VGroup(dot, arrow)

            text.next_to(circles, UP)
            circles = VGroup(circle1, circle2)
            circles.arrange(RIGHT)
            dot_arrow.next_to(circles, DOWN)

            return VGroup(text, circle1, circle2, dot, arrow)

        if obj is None:
            mobs = get_obj()
        else:
            mobs = obj

        if need_prior:
            self.add(mobs)

        name_text = Text(str(idx) + ". " + ani_name, stroke_width=0, size=0.4, color=YELLOW)
        name_text.to_corner(UL)

        self.add(name_text)
        self.wait()

        for mob in mobs:
            if len(ani) == 1:
                self.play(ani[0](mob), run_time=1)
            elif len(ani) == 2:
                self.play(ani[0](mob, ani[1]), run_time=1)
            elif len(ani) == 3:
                self.play(ani[0](mob, ani[1], ani[2]), run_time=1)
            else:
                self.play(ani[0](mob, ani[1:]), run_time=1)

        self.wait()
        self.remove(name_text, mobs)