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src/CalcViewModel/Common/CalculatorDisplay.h

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+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+#pragma once
+
+namespace CalculatorApp
+{
+    // Callback interface to be implemented by the CalculatorManager
+    class CalculatorDisplay: public ICalcDisplay
+    {
+    public:
+        CalculatorDisplay();
+        void SetCallback(Platform::WeakReference callbackReference);
+        void SetHistoryCallback(Platform::WeakReference callbackReference);
+
+    private:
+        void SetPrimaryDisplay(_In_ const std::wstring& displayString, _In_ bool isError) override;
+        void SetIsInError(bool isError) override;
+        void SetExpressionDisplay(_Inout_ std::shared_ptr<CalculatorVector<std::pair<std::wstring, int>>> const &tokens, _Inout_ std::shared_ptr<CalculatorVector<std::shared_ptr<IExpressionCommand>>> const &commands) override;
+        void SetMemorizedNumbers(_In_ const std::vector<std::wstring>& memorizedNumbers) override;
+        void OnHistoryItemAdded(_In_ unsigned int addedItemIndex) override;
+        void SetParenDisplayText(_In_ const std::wstring& parenthesisCount) override;
+        void MaxDigitsReached() override;
+        void BinaryOperatorReceived() override;
+        void MemoryItemChanged(unsigned int indexOfMemory) override;
+
+    private:
+        Platform::WeakReference m_callbackReference;
+        Platform::WeakReference m_historyCallbackReference;
+    };
+}