include <stdafx.h>
  include <DBSimpleUpdate.h>
  include <ProductView.h>
  include <ProductSet.h>
  include <viewconstants.h>
  include <MainFrm.h>
  include <DBSimpleUpdateDoc.h>
  
  CProductView::CProductView()
    : CRecordView(CProductView::IDD),
      m_pSet(NULL)
      , m_OrderID(0)
      , m_CustomerName(_T(""))
      , m_Quantity(0)
      , m_Discount(0)
      , m_OrderAdded(false)
      , m_TotalValue(0.0)
  {
  }
  
  CProductView::~CProductView()
  {
    if (m_pSet)
      delete m_pSet;
  }
  
  void CProductView::DoDataExchange(CDataExchange* pDX)
  {
    // TODO: Add your specialized code here and/or call the base class
  
    CRecordView::DoDataExchange(pDX);
    DDX_FieldText(pDX, IDC_PRODUCTNAME, m_pSet->m_ProductName, m_pSet);
    DDX_Text(pDX, IDC_NEWORDERID, m_OrderID);
    DDX_Text(pDX, IDC_CUSTOMERNAME, m_CustomerName);
    DDX_Text(pDX, IDC_ORDERQUANTITY, m_Quantity);
    DDX_Text(pDX, IDC_ORDERSDISCOUNT, m_Discount);
    DDX_Text(pDX, IDC_TOTALVALUE, m_TotalValue);
  }
  
  void CProductView::OnInitialUpdate()
  {
    CRecordView::OnInitialUpdate();
  
    // TODO: Add your specialized code here and/or call the base class
  }
  
  CRecordset* CProductView::OnGetRecordset()
  {
    if(m_pSet == NULL)                   // If there is no recordset
    {
      m_pSet = new CProductSet(NULL);    // create one
      m_pSet->Open();                    // then open it
    }
    return m_pSet;                       // Return the address of the recordset
  }
  
  CProductSet* CProductView::GetRecordset()
  {
    return static_cast<CProductSet*>(OnGetRecordset());
  }
  
  ifdef _DEBUG
  void CProductView::AssertValid() const
  {
    CRecordView::AssertValid();
  }
  
  void CProductView::Dump(CDumpContext& dc) const
  {
    CRecordView::Dump(dc);
  }
  endif //_DEBUG
  BEGIN_MESSAGE_MAP(CProductView, CRecordView)
    ON_BN_CLICKED(IDC_SELECTPRODUCT, &CProductView::OnSelectproduct)
    ON_BN_CLICKED(IDC_DONE, &CProductView::OnDone)
  END_MESSAGE_MAP()
  
  void CProductView::OnSelectproduct()
  {
    UpdateData(TRUE);                              // Transfer data from controls
  
    // Get a pointer to the document  
    CDBSimpleUpdateDoc* pDoc = static_cast<CDBSimpleUpdateDoc*>(GetDocument()); 
  
    if(!m_OrderAdded)                              // If order not added
      m_OrderAdded = pDoc->AddOrder();             // then try to add it
    if(m_OrderAdded)
    {
       pDoc->AddOrderDetails(m_pSet->m_ProductID,
                             m_pSet->m_UnitPrice,
                             m_Quantity,
                             m_Discount);
      // Accumulating the total order value
      // Add unit price to total value
      m_TotalValue += m_Quantity*m_pSet->m_UnitPrice*(1.0-m_Discount);
  
      // Now reset the values in the quantity and discount controls
      m_Quantity = 1;
      m_Discount = 0;
      UpdateData(FALSE);                           // Transfer data to controls
    }
  }
  
  void CProductView::InitializeView(void)
  {
    // Get a pointer to the document  
    CDBSimpleUpdateDoc* pDoc = static_cast<CDBSimpleUpdateDoc*>(GetDocument());
  
    m_OrderID = pDoc->m_Order.m_OrderID;
    m_CustomerName = pDoc->m_Order.m_ShipName;
    m_Quantity = 1;                                // Must order at least 1
    m_Discount = 0;                                // No default discount
    m_OrderAdded = false;                          // Order not added initially
    m_TotalValue = 0.0;                            // Reset total value
    UpdateData(FALSE);                             // Transfer data to controls
  }
  
  void CProductView::OnDone()
  {
    static_cast<CMainFrame*>(GetParentFrame())->SelectView(ORDER_DETAILS);
  }