Improve error handling by displaying an error message (#1075)

* wire up error messages

* more errors

* fix crash on render error

* Always show copy and cut

* PR comments

* Fix spelling

src/GraphingImpl/Mocks/Graph.h

@@ -29,6 +29,11 @@ namespace MockGraphingImpl
             return std::nullopt;
         }
 
+        HRESULT GetInitializationError()
+        {
+            return S_OK;
+        }
+
         virtual Graphing::IGraphingOptions& GetOptions()
         {
             return m_graphingOptions;

src/GraphingImpl/Mocks/MathSolver.h

@@ -115,7 +115,7 @@ namespace MockGraphingImpl
             return m_formatOptions;
         }
 
-        std::unique_ptr<Graphing::IExpression> ParseInput(const std::wstring& input) override
+        std::unique_ptr<Graphing::IExpression> ParseInput(const std::wstring& input, int& errorCodeOut, int& errorTypeOut) override
         {
             if (input.empty())
             {
@@ -125,6 +125,10 @@ namespace MockGraphingImpl
             return std::make_unique<MockExpression>(MockExpression{});
         }
 
+        void HRErrorToErrorInfo(HRESULT hr, int& errorCodeOut, int& errorTypeOut)
+        {
+        }
+
         std::shared_ptr<Graphing::IGraph> CreateGrapher(const Graphing::IExpression* expression) override;
 
         std::shared_ptr<Graphing::IGraph> CreateGrapher() override;