ToggleBoolAction now has a errorOccured()

src/actions/toggleboolaction.h

@@ -3,16 +3,19 @@
 // local includes
 #include "actioninterface.h"
 #include "accessorinterface.h"
+#include "errorhandlerinterface.h"
 
 namespace espgui {
 class ToggleBoolAction :
     public virtual ActionInterface,
-    public virtual AccessorInterface<bool>
+    public virtual AccessorInterface<bool>,
+    public virtual ErrorHandlerInterface
 {
 public:
     void triggered() override
     {
-        setValue(!getValue());
+        if (auto result = setValue(!getValue()); !result)
+            errorOccured(std::move(result).error());
     }
 };
 } // namespace espgui