calculator/src/CalcViewModel/MemoryItemViewModel.h

// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.

#pragma once

#include "Common/Utils.h"

namespace CalculatorApp
{
    namespace ViewModel
    {
        ref class StandardCalculatorViewModel;

        /// <summary>
        /// Model representation of a single item in the Memory list
        /// </summary>
        [Windows::UI::Xaml::Data::Bindable] public ref class MemoryItemViewModel sealed : public Windows::UI::Xaml::Data::INotifyPropertyChanged,
                                                                                          Windows::UI::Xaml::Data::ICustomPropertyProvider
        {
        public:
            MemoryItemViewModel(StandardCalculatorViewModel ^ calcVM)
                : m_Position(-1)
                , m_calcVM(calcVM)
            {
            }
            OBSERVABLE_OBJECT();
            OBSERVABLE_PROPERTY_RW(int, Position);
            OBSERVABLE_PROPERTY_RW(Platform::String ^, Value);

            virtual Windows::UI::Xaml::Data::ICustomProperty
                ^ GetCustomProperty(Platform::String ^ name) { return nullptr; }

                virtual Windows::UI::Xaml::Data::ICustomProperty
                ^ GetIndexedProperty(Platform::String ^ name, Windows::UI::Xaml::Interop::TypeName type) { return nullptr; }

                virtual property Windows::UI::Xaml::Interop::TypeName Type
            {
                Windows::UI::Xaml::Interop::TypeName get()
                {
                    return this->GetType();
                }
            }

            virtual Platform::String
                ^ GetStringRepresentation() { return Value; }

                void Clear();
            void MemoryAdd();
            void MemorySubtract();

        private:
            StandardCalculatorViewModel ^ m_calcVM;
        };
    }
}