class LinearNumberSlider(ControlMobject):
CONFIG = {
# Since, only slider circle listnes to drag event
"listen_to_events": False,
"value_type": np.float64,
"min_value": -10.0,
"max_value": 10.0,
"step": 1.0,
"rounded_rect_kwargs": {
"height": 0.075,
"width": 2,
"corner_radius": 0.0375
},
"circle_kwargs": {
"radius": 0.1,
"stroke_color": GREY_A,
"fill_color": GREY_A,
"fill_opacity": 1.0
}
}
def __init__(self, value=0, **kwargs):
digest_config(self, kwargs)
self.bar = RoundedRectangle(**self.rounded_rect_kwargs)
self.slider = Circle(**self.circle_kwargs)
self.slider_axis = Line(start=self.bar.get_bounding_box_point(LEFT),
end=self.bar.get_bounding_box_point(RIGHT))
self.slider_axis.set_opacity(0.0)
self.slider.move_to(self.slider_axis)
self.slider.listen_to_events = True
self.slider.on_mouse_drag = self.slider_on_mouse_drag
super().__init__(value, self.bar, self.slider, self.slider_axis,
**kwargs)
def assert_value(self, value):
assert (self.min_value <= value <= self.max_value)
def set_value_anim(self, value):
prop = (value - self.min_value) / (self.max_value - self.min_value)
self.slider.move_to(self.slider_axis.point_from_proportion(prop))
def slider_on_mouse_drag(self, point, d_point, buttons, modifiers):
self.set_value(self.get_value_from_point(point))
return False
# Helper Methods
def get_value_from_point(self, point):
start, end = self.slider_axis.get_start_and_end()
point_on_line = get_closest_point_on_line(start, end, point)
prop = get_norm(point_on_line - start) / get_norm(end - start)
value = self.min_value + prop * (self.max_value - self.min_value)
no_of_steps = int((value - self.min_value) / self.step)
value_nearest_to_step = self.min_value + no_of_steps * self.step
return value_nearest_to_step
class LinearNumberSlider(ControlMobject):
CONFIG = {
"value_type": np.float64,
"min_value": -10.0,
"max_value": 10.0,
"step": 1.0,
"rounded_rect_kwargs": {
"height": 0.075,
"width": 2,
"corner_radius": 0.0375
},
"circle_kwargs": {
"radius": 0.1,
"stroke_color": GREY_A,
"fill_color": GREY_A,
"fill_opacity": 1.0
}
}
def __init__(self, value: float = 0, **kwargs):
digest_config(self, kwargs)
self.bar = RoundedRectangle(**self.rounded_rect_kwargs)
self.slider = Circle(**self.circle_kwargs)
self.slider_axis = Line(
start=self.bar.get_bounding_box_point(LEFT),
end=self.bar.get_bounding_box_point(RIGHT)
)
self.slider_axis.set_opacity(0.0)
self.slider.move_to(self.slider_axis)
self.slider.add_mouse_drag_listner(self.slider_on_mouse_drag)
super().__init__(value, self.bar, self.slider, self.slider_axis, **kwargs)
def assert_value(self, value: float) -> None:
assert(self.min_value <= value <= self.max_value)
def set_value_anim(self, value: float) -> None:
prop = (value - self.min_value) / (self.max_value - self.min_value)
self.slider.move_to(self.slider_axis.point_from_proportion(prop))
def slider_on_mouse_drag(self, mob, event_data: dict[str, np.ndarray]) -> bool:
self.set_value(self.get_value_from_point(event_data["point"]))
return False
# Helper Methods
def get_value_from_point(self, point: np.ndarray) -> float:
start, end = self.slider_axis.get_start_and_end()
point_on_line = get_closest_point_on_line(start, end, point)
prop = get_norm(point_on_line - start) / get_norm(end - start)
value = self.min_value + prop * (self.max_value - self.min_value)
no_of_steps = int((value - self.min_value) / self.step)
value_nearest_to_step = self.min_value + no_of_steps * self.step
return value_nearest_to_step