fix: Remove ball when unselecting the pick button

Author: AlejandroFernandezLuces

src/ansys/tools/visualization_interface/backends/pyvista/pyvista.py

@@ -376,7 +376,7 @@ def focus_point_selection(self, actor: "pv.Actor") -> None:
         """
         pt = self._pl.scene.picked_point
         sphere = pv.Sphere(center=pt, radius=0.1)
-        self._pl.scene.add_mesh(sphere, color="red", name="focus_sphere_temp", reset_camera=False)
+        self._picked_ball = self._pl.scene.add_mesh(sphere, color="red", name="focus_sphere_temp", reset_camera=False)
         self._pl.scene.set_focus(pt)
         self._pl.scene.render()
 
@@ -433,6 +433,11 @@ def disable_hover(self):
         """Disable hover capabilities in the plotter."""
         self._hover_widget.EnabledOff()
 
+    def disable_center_focus(self):
+        """Disable setting the focus of the camera to the picked point."""
+        self._pl.scene.disable_picking()
+        self._picked_ball.SetVisibility(False)
+
     def __extract_kwargs(self, func_name: Callable, input_kwargs: Dict[str, Any]) -> Dict[str, Any]:
         """Extracts the keyword arguments from a function signature and returns it as dict.
 

src/ansys/tools/visualization_interface/backends/pyvista/widgets/pick_rotation_center.py

@@ -72,7 +72,7 @@ def callback(self, state: bool) -> None:
         # Lazy import to avoid circular import
         if not state:
             self._text_actor.SetVisibility(0)
-            self.plotter_helper.scene.disable_picking()
+            self.plotter_helper.disable_center_focus()
             if self.plotter_helper._allow_picking:
                 self.plotter_helper.enable_picking()
             elif self.plotter_helper._allow_hovering: