Do not show click to start wire cursor for hidden pins.

Selecting show hidden pins will allow users to connect to hidden pins.

Fixes https://gitlab.com/kicad/code/kicad/-/issues/17145

eeschema/sch_symbol.cpp

@@ -1103,6 +1103,29 @@ SCH_PIN* SCH_SYMBOL::GetPin( const wxString& aNumber ) const
 }
 
 
+const SCH_PIN* SCH_SYMBOL::GetPin( const VECTOR2I& aPos ) const
+{
+    for( const std::unique_ptr<SCH_PIN>& pin : m_pins )
+    {
+        int pin_unit      = pin->GetLibPin() ? pin->GetLibPin()->GetUnit()
+                                             : GetUnit();
+        int pin_bodyStyle = pin->GetLibPin() ? pin->GetLibPin()->GetBodyStyle()
+                                             : GetBodyStyle();
+
+        if( pin_unit > 0 && pin_unit != GetUnit() )
+            continue;
+
+        if( pin_bodyStyle > 0 && pin_bodyStyle != GetBodyStyle() )
+            continue;
+
+        if( pin->IsPointClickableAnchor( aPos ) )
+            return pin.get();
+    }
+
+    return nullptr;
+}
+
+
 std::vector<SCH_PIN*> SCH_SYMBOL::GetLibPins() const
 {
     if( m_part )

eeschema/sch_symbol.h

@@ -619,6 +619,15 @@ public:
      */
     SCH_PIN* GetPin( SCH_PIN* aLibPin ) const;
 
+    /**
+     * Return the #SCH_PIN object found at \a aPosition.
+     *
+     * @param aPosition is the position of the pin to fetch.
+     *
+     * @return the #SCH_PIN object found at \a aPosition or nullptr.
+     */
+    const SCH_PIN* GetPin( const VECTOR2I& aPosition ) const;
+
     /**
      * Retrieve a list of the SCH_PINs for the given sheet path.
      *

eeschema/tools/ee_selection_tool.cpp

@@ -965,6 +965,19 @@ OPT_TOOL_EVENT EE_SELECTION_TOOL::autostartEvent( TOOL_EVENT* aEvent, EE_GRID_HE
             if( possibleConnection.IsBus() )
                 newEvt = EE_ACTIONS::drawBus.MakeEvent();
         }
+        else if( aItem->Type() == SCH_SYMBOL_T )
+        {
+            const SCH_SYMBOL* symbol = static_cast<const SCH_SYMBOL*>( aItem );
+
+            wxCHECK( symbol, OPT_TOOL_EVENT() );
+
+            const SCH_PIN* pin = symbol->GetPin( pos );
+
+            wxCHECK( pin, OPT_TOOL_EVENT() );
+
+            if( !pin->IsVisible() && !m_frame->eeconfig()->m_Appearance.show_hidden_pins )
+                return OPT_TOOL_EVENT();
+        }
 
         newEvt->SetMousePosition( pos );
         newEvt->SetHasPosition( true );