def test_drag_overlapping(self):
bottom = Frame(self.context)
bottom.draggable = True
bottom.bounds = Bounds(10, 10, 50, 50)
bottom.set_color(StyleKeys.Background, RGBA(1, 0, 0, 1))
top = Frame(self.context)
top.draggable = True
top.bounds = Bounds(20, 20, 50, 50)
top.set_color(StyleKeys.Background, RGBA(0, 0, 1, 1))
self.mouse.move_to(Point(30, 30))
self.mouse.press(MouseButton.LEFT)
self.mouse.move_to(Point(50, 50))
self.mouse.release(MouseButton.LEFT)
self.context.process()
self.assertImage("drag_overlapping_top", self.context)
self.mouse.move_to(Point(20, 20))
self.mouse.press(MouseButton.LEFT)
self.mouse.move_to(Point(40, 40))
self.mouse.release(MouseButton.LEFT)
self.context.process()
self.assertImage("drag_overlapping_bottom", self.context)
def test_drag(self):
window = Frame(self.context)
window.draggable = True
window.resizable = True
window.bounds = Bounds(10, 10, 50, 50)
self.mouse.move_to(Point(30, 30))
self.mouse.press(MouseButton.RIGHT)
self.mouse.move_to(Point(40, 40))
self.mouse.release(MouseButton.RIGHT)
self.context.process()
self.assertImage("drag_with_right_button", self.context)
window.bounds = Bounds(10, 10, 50, 50)
self.mouse.move_to(Point(20, 20))
self.mouse.press(MouseButton.LEFT)
self.mouse.move_to(Point(30, 40))
self.mouse.release(MouseButton.LEFT)
self.context.process()
self.assertImage("drag_with_left_button", self.context)
window.bounds = Bounds(10, 10, 50, 50)
self.mouse.move_to(Point(10, 10))
self.mouse.press(MouseButton.LEFT)
self.mouse.press(MouseButton.MIDDLE)
self.mouse.move_to(Point(40, 30))
self.mouse.release(MouseButton.MIDDLE)
self.mouse.move_to(Point(20, 50))
self.context.process()
self.assertImage("drag_with_2_buttons", self.context)
self.mouse.release(MouseButton.LEFT)
window.bounds = Bounds(10, 10, 50, 50)
window.draggable = False
self.mouse.move_to(Point(30, 30))
self.mouse.press(MouseButton.LEFT)
self.mouse.move_to(Point(50, 30))
self.mouse.release(MouseButton.LEFT)
self.context.process()
self.assertImage("drag_non_draggable", self.context)
def test_location(self):
locations = []
rv.observe(self.fixture.location).subscribe(locations.append)
self.assertEqual(Point(0, 0), self.fixture.location)
self.assertEqual([Point(0, 0)], locations)
self.fixture.bounds = Bounds(10, -30, 200, 100)
self.assertEqual(Point(10, -30), self.fixture.location)
self.assertEqual([Point(0, 0), Point(10, -30)], locations)
def test_propagation(self):
component = Component(self.context)
event = MouseMoveEvent(component, Point(10, 10))
self.assertFalse(event.propagation_stopped)
event.stop_propagation()
self.assertTrue(event.propagation_stopped)
class FakeMouseInput(MouseInput):
_position: RP[Point] = rv.from_value(Point(0, 0))
_buttons: RP[int] = rv.from_value(0)
position: RV[Point] = _position.as_view()
buttons: RV[int] = _buttons.as_view()
def __init__(self, context: Context):
super().__init__(context)
self._scroll = Subject()
@property
def on_mouse_wheel(self) -> Observable:
return self._scroll
def pressed(self, button: MouseButton) -> bool:
if button is None:
raise ValueError("Argument 'button' is required.")
return self._buttons & button == button
def press(self, button: MouseButton) -> None:
if button is None:
raise ValueError("Argument 'button' is required.")
self._buttons = self._buttons | button
def release(self, button: MouseButton) -> None:
if button is None:
raise ValueError("Argument 'button' is required.")
self._buttons = self._buttons ^ button
def click(self, button: MouseButton) -> None:
self.press(button)
self.release(button)
def move_to(self, location: Point) -> None:
if location is None:
raise ValueError("Argument 'location' is required.")
# noinspection PyTypeChecker
self._position = location
def scroll(self, lines: int) -> None:
self._scroll.on_next(lines)
def dispose(self) -> None:
self.execute_safely(self._scroll.dispose)
super().dispose()
def test_hover(self):
window = Window(self.context)
window.bounds = Bounds(0, 0, 100, 60)
button = LabelButton(self.context)
button.text = "AlleyCat"
button.text_size = 14
button.bounds = Bounds(10, 10, 80, 40)
window.add(button)
values = []
rv.observe(button, "hover").subscribe(values.append)
self.assertFalse(button.hover)
self.assertEqual([False], values)
self.mouse.move_to(Point(50, 30))
self.context.process()
self.assertTrue(button.hover)
self.assertEqual([False, True], values)
self.assertImage("hover_mouse_over", self.context, tolerance=Tolerance)
self.mouse.move_to(Point(0, 0))
self.context.process()
self.assertFalse(button.hover)
self.assertEqual([False, True, False], values)
self.assertImage("hover_mouse_out", self.context, tolerance=Tolerance)
self.mouse.move_to(Point(10, 10))
self.context.process()
self.assertTrue(button.hover)
self.assertEqual([False, True, False, True], values)
self.assertImage("hover_mouse_over2",
self.context,
tolerance=Tolerance)
def test_window_at(self):
manager = self.context.window_manager
bottom = Frame(self.context)
bottom.bounds = Bounds(0, 0, 100, 100)
middle = Frame(self.context)
middle.bounds = Bounds(100, 100, 100, 100)
top = Frame(self.context)
top.bounds = Bounds(50, 50, 100, 100)
self.assertEqual(Some(bottom), manager.window_at(Point(0, 0)))
self.assertEqual(Some(bottom), manager.window_at(Point(100, 0)))
self.assertEqual(Some(bottom), manager.window_at(Point(0, 100)))
self.assertEqual(Some(middle), manager.window_at(Point(200, 100)))
self.assertEqual(Some(middle), manager.window_at(Point(200, 200)))
self.assertEqual(Some(middle), manager.window_at(Point(100, 200)))
self.assertEqual(Some(top), manager.window_at(Point(100, 100)))
self.assertEqual(Some(top), manager.window_at(Point(150, 150)))
self.assertEqual(Some(top), manager.window_at(Point(150, 50)))
self.assertEqual(Some(top), manager.window_at(Point(50, 150)))
def draw(self, g: Graphics) -> None:
if self.visible:
g.save()
(dx,
dy) = self.parent.map(lambda p: p.location).value_or(Point(0, 0))
(cx, cy, cw, ch) = self.ui.clip_bounds(self).tuple
g.translate(dx, dy)
g.rectangle(cx, cy, cw, ch)
g.clip()
try:
self.draw_component(g)
except BaseException as e:
self.error_handler(e)
g.restore()
def test_point_to_tuple(self):
self.assertEqual((3, 2), Point(3, 2).tuple)
def test_bounds_contains(self):
self.assertTrue(Bounds(10, 20, 100, 50).contains(Point(60, 40)))
self.assertFalse(Bounds(10, 20, 100, 50).contains(Point(0, 40)))
self.assertTrue(Bounds(-50, -40, 100, 80).contains(Point(50, 0)))
self.assertFalse(Bounds(-50, -40, 100, 80).contains(Point(51, 0)))
def test_bounds_points(self):
points = (Point(-10, 20), Point(70, 20), Point(70, 60), Point(-10, 60))
self.assertEqual(points, Bounds(-10, 20, 80, 40).points)
def test_bounds_location(self):
self.assertEqual(Point(10, 20), Bounds(10, 20, 100, 200).location)
def test_point_operations(self):
self.assertEqual(Point(-5, 8), Point(-10, 6) + Point(5, 2))
self.assertEqual(Point(4., -2.5), Point(6.3, 0) - Point(2.3, 2.5))
self.assertEqual(Point(-6, -10), Point(3, 5) * -2)
self.assertEqual(Point(5.2, -1.5), Point(10.4, -3) / 2)
self.assertEqual(Point(-3, 6), -Point(3, -6))
def test_resize_to_collapse(self):
window = Frame(self.context)
window.draggable = True
window.resizable = True
def resize(drag_from: Point, drag_to: Point, expected: Bounds) -> None:
window.bounds = Bounds(20, 20, 60, 60)
self.mouse.move_to(drag_from)
self.mouse.press(MouseButton.LEFT)
self.mouse.move_to(drag_to)
self.mouse.release(MouseButton.LEFT)
self.context.process()
self.assertEqual(expected, window.bounds)
resize(Point(40, 25), Point(40, 95), Bounds(20, 80, 60, 0))
resize(Point(75, 25), Point(5, 95), Bounds(20, 80, 0, 0))
resize(Point(75, 40), Point(5, 40), Bounds(20, 20, 0, 60))
resize(Point(75, 75), Point(5, 5), Bounds(20, 20, 0, 0))
resize(Point(40, 75), Point(40, 5), Bounds(20, 20, 60, 0))
resize(Point(25, 75), Point(95, 5), Bounds(80, 20, 0, 0))
resize(Point(25, 40), Point(95, 40), Bounds(80, 20, 0, 60))
resize(Point(25, 25), Point(95, 95), Bounds(80, 80, 0, 0))
def test_point_init(self):
point = Point(10.5, -20.2)
self.assertEqual(10.5, point.x)
self.assertEqual(-20.2, point.y)
def test_component_at_with_layers(self):
parent = Container(self.context)
parent.bounds = Bounds(0, 0, 200, 200)
bottom = Container(self.context)
bottom.bounds = Bounds(0, 0, 100, 100)
middle = Container(self.context)
middle.bounds = Bounds(100, 100, 100, 100)
top = Container(self.context)
top.bounds = Bounds(50, 50, 100, 100)
parent.add(bottom)
parent.add(middle)
parent.add(top)
self.assertEqual(Some(parent), parent.component_at(Point(200, 0)))
self.assertEqual(Some(parent), parent.component_at(Point(0, 200)))
self.assertEqual(Some(bottom), parent.component_at(Point(0, 0)))
self.assertEqual(Some(bottom), parent.component_at(Point(100, 0)))
self.assertEqual(Some(bottom), parent.component_at(Point(0, 100)))
self.assertEqual(Some(middle), parent.component_at(Point(200, 100)))
self.assertEqual(Some(middle), parent.component_at(Point(200, 200)))
self.assertEqual(Some(middle), parent.component_at(Point(100, 200)))
self.assertEqual(Some(top), parent.component_at(Point(100, 100)))
self.assertEqual(Some(top), parent.component_at(Point(150, 150)))
self.assertEqual(Some(top), parent.component_at(Point(150, 50)))
self.assertEqual(Some(top), parent.component_at(Point(50, 150)))
def test_active(self):
window = Window(self.context)
window.bounds = Bounds(0, 0, 100, 60)
button = LabelButton(self.context)
button.text = "AlleyCat"
button.text_size = 14
button.bounds = Bounds(10, 10, 80, 40)
window.add(button)
values = []
rv.observe(button, "active").subscribe(values.append)
self.assertFalse(button.active)
self.assertEqual([False], values)
self.mouse.move_to(Point(50, 30))
self.mouse.press(MouseButton.LEFT)
self.context.process()
self.assertTrue(button.active)
self.assertEqual([False, True], values)
self.assertImage("active_mouse_down",
self.context,
tolerance=Tolerance)
self.mouse.release(MouseButton.LEFT)
self.context.process()
self.assertFalse(button.active)
self.assertEqual([False, True, False], values)
self.assertImage("active_mouse_up", self.context, tolerance=Tolerance)
self.mouse.press(MouseButton.LEFT)
self.mouse.move_to(Point(0, 0))
self.context.process()
self.assertTrue(button.active)
self.assertEqual([False, True, False, True], values)
self.assertImage("active_mouse_drag_out",
self.context,
tolerance=Tolerance)
self.mouse.release(MouseButton.LEFT)
self.mouse.press(MouseButton.LEFT)
self.mouse.move_to(Point(50, 30))
self.context.process()
self.assertFalse(button.active)
self.assertEqual([False, True, False, True, False], values)
self.assertImage("active_mouse_drag_in",
self.context,
tolerance=Tolerance)
self.mouse.release(MouseButton.LEFT)
self.mouse.press(MouseButton.RIGHT)
self.context.process()
self.assertFalse(button.active)
self.assertEqual([False, True, False, True, False], values)
self.assertImage("active_right_button",
self.context,
tolerance=Tolerance)
class Component(Drawable, StyleResolver, MouseEventHandler, EventDispatcher,
ContextAware, ReactiveObject):
visible: RP[bool] = rv.new_property()
parent: RP[Maybe[Container]] = rv.from_value(Nothing)
offset: RV[Point] = parent.as_view().map(lambda _, parent: parent.map(
lambda p: rx.combine_latest(p.observe("offset"), p.observe("location"))
.pipe(ops.map(lambda v: v[0] + v[1]))).or_else_call(lambda: rx.of(
Point(0, 0)))).pipe(lambda _: (ops.exclusive(), ))
_minimum_size: RP[Dimension] = rv.from_value(Dimension(0, 0))
_preferred_size: RP[Dimension] = rv.from_value(Dimension(0, 0))
minimum_size_override: RP[Maybe[Dimension]] = rv.from_value(Nothing)
minimum_size: RV[Dimension] = rv.combine_latest(
_minimum_size,
minimum_size_override)(ops.pipe(ops.map(lambda v: v[1].value_or(v[0])),
ops.distinct_until_changed()))
preferred_size_override: RP[Maybe[Dimension]] = rv.from_value(
Nothing).pipe(lambda o:
(ops.combine_latest(o.observe("minimum_size")),
ops.map(lambda t: t[0].map(lambda v: t[1].copy(
width=max(v.width, t[1].width),
height=max(v.height, t[1].height)))),
ops.distinct_until_changed()))
preferred_size: RV[Dimension] = rv.combine_latest(
_preferred_size, preferred_size_override, minimum_size)(ops.pipe(
ops.map(lambda v: (v[1].value_or(v[0]), v[2])),
ops.map(lambda v: v[0].copy(width=max(v[0].width, v[1].width),
height=max(v[0].height, v[1].height))),
ops.distinct_until_changed()))
bounds: RP[Bounds] = Bounded.bounds.pipe(lambda o: (
ops.combine_latest(o.observe("minimum_size")),
ops.map(lambda v: v[0].copy(width=max(v[0].width, v[1].width),
height=max(v[0].height, v[1].height))),
ops.start_with(o.preferred_size)))
def __init__(self, context: Context, visible: bool = True) -> None:
if context is None:
raise ValueError("Argument 'context' is required.")
# noinspection PyTypeChecker
self.visible = visible
self._context = context
self._valid = False
self._ui = self.create_ui()
assert self._ui is not None
super().__init__()
self.validate()
self.ui \
.on_invalidate(self) \
.pipe(ops.take_until(self.on_dispose)) \
.subscribe(lambda _: self.invalidate(), on_error=self.error_handler)
@property
def context(self) -> Context:
return self._context
@property
def ui(self) -> ComponentUI:
return self._ui
@property
def look_and_feel(self) -> LookAndFeel:
return self.context.look_and_feel
def create_ui(self) -> ComponentUI:
return self.context.look_and_feel.create_ui(self)
def show(self) -> None:
# noinspection PyTypeChecker
self.visible = True
def hide(self) -> None:
# noinspection PyTypeChecker
self.visible = False
@property
def valid(self) -> bool:
return self._valid
# noinspection PyTypeChecker
def validate(self, force: bool = False) -> None:
if self.visible and (not self.valid or force):
self._minimum_size = self.ui.minimum_size(self)
self._preferred_size = self.ui.preferred_size(self)
self._valid = True
self.parent.map(lambda p: p.request_layout())
def invalidate(self) -> None:
self._valid = False
self.parent.map(lambda p: p.invalidate())
def draw(self, g: Graphics) -> None:
if self.visible:
g.save()
(dx,
dy) = self.parent.map(lambda p: p.location).value_or(Point(0, 0))
(cx, cy, cw, ch) = self.ui.clip_bounds(self).tuple
g.translate(dx, dy)
g.rectangle(cx, cy, cw, ch)
g.clip()
try:
self.draw_component(g)
except BaseException as e:
self.error_handler(e)
g.restore()
def draw_component(self, g: Graphics) -> None:
self.ui.draw(g, self)
def position_of(self, event: PositionalEvent) -> Point:
if event is None:
raise ValueError("Argument 'event' is required.")
return event.position - self.offset
@property
def inputs(self) -> Mapping[str, Input]:
return self.context.inputs
@property
def parent_dispatcher(self) -> Maybe[EventDispatcher]:
# noinspection PyTypeChecker
return self.parent
def __repr__(self) -> Any:
return str({"id": id(self), "type": type(self).__name__})
def test_resize_with_min_size(self):
window = Frame(self.context)
window.draggable = True
window.resizable = True
window.minimum_size_override = Some(Dimension(30, 30))
def resize(drag_from: Point, drag_to: Point, expected: Bounds) -> None:
window.bounds = Bounds(20, 20, 60, 60)
self.mouse.move_to(drag_from)
self.mouse.press(MouseButton.LEFT)
self.mouse.move_to(drag_to)
self.mouse.release(MouseButton.LEFT)
self.context.process()
self.assertEqual(expected, window.bounds)
resize(Point(40, 25), Point(40, 95), Bounds(20, 50, 60, 30))
resize(Point(75, 25), Point(5, 95), Bounds(20, 50, 30, 30))
resize(Point(75, 40), Point(5, 40), Bounds(20, 20, 30, 60))
resize(Point(75, 75), Point(5, 5), Bounds(20, 20, 30, 30))
resize(Point(40, 75), Point(40, 5), Bounds(20, 20, 60, 30))
resize(Point(25, 75), Point(95, 5), Bounds(50, 20, 30, 30))
resize(Point(25, 40), Point(95, 40), Bounds(50, 20, 30, 60))
resize(Point(25, 25), Point(95, 95), Bounds(50, 50, 30, 30))
def test_point_from_tuple(self):
self.assertEqual(Point(3, 2), Point.from_tuple((3, 2)))
def test_point_unpack(self):
(x, y) = Point(20.2, 15.3)
self.assertEqual(20.2, x)
self.assertEqual(15.3, y)
def test_point_copy(self):
self.assertEqual(Point(3, 2), Point(1, 5).copy(x=3, y=2))
self.assertEqual(Point(3, 5), Point(1, 5).copy(x=3))
self.assertEqual(Point(1, 2), Point(1, 5).copy(y=2))
self.assertEqual(Point(1, 5), Point(1, 5).copy())
def test_bounds_operations(self):
self.assertEqual(Bounds(0, 0, 100, 200),
Bounds(0, 0, 100, 200) + Point(20, 30))
self.assertEqual(Bounds(0, 0, 100, 230),
Bounds(0, 0, 100, 200) + Point(80, 230))
self.assertEqual(Bounds(0, 0, 120, 230),
Bounds(0, 0, 100, 200) + Point(120, 230))
self.assertEqual(Bounds(-20, 0, 120, 200),
Bounds(0, 0, 100, 200) + Point(-20, 30))
self.assertEqual(Bounds(-20, -30, 120, 230),
Bounds(0, 0, 100, 200) + Point(-20, -30))
self.assertEqual(Bounds(0, 0, 50, 40),
Bounds(0, 0, 30, 30) + Bounds(20, 10, 30, 30))
self.assertEqual(Bounds(-10, -20, 50, 30),
Bounds(0, 0, 30, 30) + Bounds(-10, -20, 50, 30))
self.assertEqual(Bounds(0, 0, 30, 30),
Bounds(0, 0, 30, 30) + Bounds(10, 10, 20, 10))
self.assertEqual(Bounds(20, 40, 200, 400),
Bounds(20, 40, 100, 200) * 2)
self.assertEqual(Bounds(20, 40, 100, 200),
Bounds(20, 40, 200, 400) / 2)
self.assertEqual(Nothing,
Bounds(10, 20, 100, 60) & Bounds(120, 20, 100, 60))
self.assertEqual(Nothing,
Bounds(10, 20, 100, 60) & Bounds(-120, 20, 100, 60))
self.assertEqual(Nothing,
Bounds(10, 20, 100, 60) & Bounds(10, 90, 100, 60))
self.assertEqual(Nothing,
Bounds(10, 20, 100, 60) & Bounds(10, -50, 100, 60))
self.assertEqual(Bounds(10, 20, 30, 20),
(Bounds(10, 20, 100, 60)
& Bounds(-60, -20, 100, 60)).unwrap())
self.assertEqual(Bounds(60, 20, 50, 20),
(Bounds(10, 20, 100, 60)
& Bounds(60, -20, 100, 60)).unwrap())
self.assertEqual(Bounds(60, 40, 50, 40),
(Bounds(10, 20, 100, 60)
& Bounds(60, 40, 100, 60)).unwrap())
self.assertEqual(Bounds(10, 40, 30, 40),
(Bounds(10, 20, 100, 60)
& Bounds(-60, 40, 100, 60)).unwrap())
self.assertEqual(Bounds(40, 30, 70, 40),
(Bounds(10, 20, 100, 60)
& Bounds(40, 30, 100, 40)).unwrap())
self.assertEqual(Bounds(10, 30, 70, 40),
(Bounds(10, 20, 100, 60)
& Bounds(-20, 30, 100, 40)).unwrap())
self.assertEqual(Bounds(20, 20, 80, 20),
(Bounds(10, 20, 100, 60)
& Bounds(20, -20, 80, 60)).unwrap())
self.assertEqual(Bounds(20, 40, 80, 40),
(Bounds(10, 20, 100, 60)
& Bounds(20, 40, 80, 60)).unwrap())
self.assertEqual(Bounds(30, 40, 50, 20),
(Bounds(10, 20, 100, 60)
& Bounds(30, 40, 50, 20)).unwrap())
self.assertEqual(Bounds(-10, 15, 130, 70),
Bounds(10, 20, 100, 60) + Insets(5, 10, 5, 20))
self.assertEqual(Bounds(15, 40, 85, 0),
Bounds(10, 20, 100, 60) - Insets(20, 10, 50, 5))
def translate(self, point: Point) -> Point:
if point is None:
raise ValueError("Argument 'point' is required.")
return point.copy(y=self.window_size.height - point.y)
def test_resize(self):
window = Frame(self.context)
window.draggable = True
window.resizable = True
def resize(name: str, drag_from: Point, drag_to: Point) -> None:
window.bounds = Bounds(20, 20, 60, 60)
self.mouse.move_to(drag_from)
self.mouse.press(MouseButton.LEFT)
self.mouse.move_to(drag_to)
self.mouse.release(MouseButton.LEFT)
self.context.process()
self.assertImage(name, self.context)
resize("resize_North", Point(40, 25), Point(40, 10))
resize("resize_Northeast", Point(75, 25), Point(90, 10))
resize("resize_East", Point(75, 40), Point(90, 40))
resize("resize_Southeast", Point(75, 75), Point(90, 90))
resize("resize_South", Point(40, 75), Point(40, 90))
resize("resize_Southwest", Point(25, 75), Point(10, 90))
resize("resize_West", Point(25, 40), Point(10, 40))
resize("resize_Northwest", Point(25, 25), Point(10, 10))
resize("resize_North_shrink", Point(40, 25), Point(40, 40))
resize("resize_Northeast_shrink", Point(75, 25), Point(60, 40))
resize("resize_East_shrink", Point(75, 40), Point(60, 40))
resize("resize_Southeast_shrink", Point(75, 75), Point(60, 60))
resize("resize_South_shrink", Point(40, 75), Point(40, 50))
resize("resize_Southwest_shrink", Point(25, 75), Point(40, 60))
resize("resize_West_shrink", Point(25, 40), Point(40, 40))
resize("resize_Northwest_shrink", Point(25, 25), Point(40, 40))
window.resizable = False
resize("resize_non_resizable", Point(40, 25), Point(40, 10))
def test_bounds_move_by(self):
self.assertEqual(Bounds(10, 50, 100, 200),
Bounds(20, 30, 100, 200).move_by(Point(-10, 20)))
def test_component_at_with_hierarchy(self):
parent = Container(self.context)
parent.bounds = Bounds(0, 0, 200, 200)
child = Container(self.context)
child.bounds = Bounds(50, 50, 100, 100)
grand_child = Container(self.context)
grand_child.bounds = Bounds(25, 25, 50, 50)
child.add(grand_child)
parent.add(child)
self.assertEqual(Nothing, parent.component_at(Point(-1, 0)))
self.assertEqual(Nothing, parent.component_at(Point(201, 0)))
self.assertEqual(Nothing, parent.component_at(Point(200, 201)))
self.assertEqual(Nothing, parent.component_at(Point(-1, 200)))
self.assertEqual(Some(parent), parent.component_at(Point(50, 49)))
self.assertEqual(Some(parent), parent.component_at(Point(151, 50)))
self.assertEqual(Some(parent), parent.component_at(Point(150, 151)))
self.assertEqual(Some(parent), parent.component_at(Point(49, 150)))
self.assertEqual(Some(child), parent.component_at(Point(50, 50)))
self.assertEqual(Some(child), parent.component_at(Point(150, 50)))
self.assertEqual(Some(child), parent.component_at(Point(150, 150)))
self.assertEqual(Some(child), parent.component_at(Point(50, 150)))
self.assertEqual(Some(grand_child), parent.component_at(Point(75, 75)))
self.assertEqual(Some(grand_child), parent.component_at(Point(125,
75)))
self.assertEqual(Some(grand_child),
parent.component_at(Point(125, 125)))
self.assertEqual(Some(grand_child), parent.component_at(Point(75,
125)))
self.assertEqual(Some(child), parent.component_at(Point(74, 75)))
self.assertEqual(Some(child), parent.component_at(Point(125, 74)))
self.assertEqual(Some(child), parent.component_at(Point(126, 125)))
self.assertEqual(Some(child), parent.component_at(Point(75, 126)))
