fix: Magic number

Author: AlejandroFernandezLuces

src/ansys/tools/visualization_interface/backends/plotly/plotly_interface.py

@@ -33,14 +33,7 @@
 
 
 class PlotlyBackend(BaseBackend):
-    """Plotly interface for visualization.
-
-    Parameters
-    ----------
-    theme : str, default: "plotly"
-        Theme for the Plotly figure. See available themes at
-        `Plotly Templates <https://plotly.com/python/templates/>`_.
-    """
+    """Plotly interface for visualization."""
 
     def __init__(self) -> None:
         """Initialize the Plotly backend."""

src/ansys/tools/visualization_interface/backends/plotly/widgets/button_manager.py

@@ -387,8 +387,8 @@ def add_projection_toggle_button(
         self.add_button(
             label=label,
             method="relayout",
-            args=[orthographic_projection],
-            args2=[perspective_projection],
+            args=[perspective_projection],
+            args2=[orthographic_projection],
             x=x,
             y=y
         )
@@ -451,8 +451,11 @@ def add_theme_toggle_button(
             "scene.zaxis.zerolinecolor": "#C8D4E3"
         }
 
-        # Add styling updates for all existing updatemenus
-        for i in range(10):  # Support up to 10 button groups
+        # Add styling updates for all existing updatemenus + the theme button we're about to add
+        # Get the actual number of updatemenus in the figure
+        current_updatemenus = self._fig.layout.updatemenus or []
+        # Add 1 to include the theme button we're about to create
+        for i in range(len(current_updatemenus) + 1):
             light_theme[f"updatemenus[{i}].bgcolor"] = "rgba(255,255,255,0.95)"
             light_theme[f"updatemenus[{i}].bordercolor"] = "rgba(0,0,0,0.3)"
             light_theme[f"updatemenus[{i}].font.color"] = "black"