// SketcherDoc.cpp : implementation of the CSketcherDoc class
  //
  
  include <stdafx.h>
  include <Sketcher.h>
  
  include <SketcherDoc.h>
  
  ifdef _DEBUG
  define new DEBUG_NEW
  endif
  
  // CSketcherDoc
  
  IMPLEMENT_DYNCREATE(CSketcherDoc, CDocument)
  
  BEGIN_MESSAGE_MAP(CSketcherDoc, CDocument)
    ON_COMMAND(ID_COLOR_BLACK, &CSketcherDoc::OnColorBlack)
    ON_COMMAND(ID_COLOR_RED, &CSketcherDoc::OnColorRed)
    ON_COMMAND(ID_COLOR_GREEN, &CSketcherDoc::OnColorGreen)
    ON_COMMAND(ID_COLOR_BLUE, &CSketcherDoc::OnColorBlue)
    ON_COMMAND(ID_ELEMENT_LINE, &CSketcherDoc::OnElementLine)
    ON_COMMAND(ID_ELEMENT_RECTANGLE, &CSketcherDoc::OnElementRectangle)
    ON_COMMAND(ID_ELEMENT_CIRCLE, &CSketcherDoc::OnElementCircle)
    ON_COMMAND(ID_ELEMENT_CURVE, &CSketcherDoc::OnElementCurve)
    ON_UPDATE_COMMAND_UI(ID_COLOR_BLACK, &CSketcherDoc::OnUpdateColorBlack)
    ON_UPDATE_COMMAND_UI(ID_COLOR_RED, &CSketcherDoc::OnUpdateColorRed)
    ON_UPDATE_COMMAND_UI(ID_COLOR_GREEN, &CSketcherDoc::OnUpdateColorGreen)
    ON_UPDATE_COMMAND_UI(ID_COLOR_BLUE, &CSketcherDoc::OnUpdateColorBlue)
    ON_UPDATE_COMMAND_UI(ID_ELEMENT_LINE, &CSketcherDoc::OnUpdateElementLine)
    ON_UPDATE_COMMAND_UI(ID_ELEMENT_RECTANGLE, &CSketcherDoc::OnUpdateElementRectangle)
    ON_UPDATE_COMMAND_UI(ID_ELEMENT_CIRCLE, &CSketcherDoc::OnUpdateElementCircle)
    ON_UPDATE_COMMAND_UI(ID_ELEMENT_CURVE, &CSketcherDoc::OnUpdateElementCurve)
  END_MESSAGE_MAP()
  
  // CSketcherDoc construction/destruction
  
  CSketcherDoc::CSketcherDoc()
  : m_Element(LINE), m_Color(BLACK)
  {
          // TODO: add one-time construction code here
  
  }
  
  CSketcherDoc::~CSketcherDoc()
  {
     // Get the position at the head of the list
     POSITION aPosition = m_ElementList.GetHeadPosition();
  
     // Now delete the element pointed to by each list entry
     while(aPosition)
        delete m_ElementList.GetNext(aPosition);
  
     m_ElementList.RemoveAll();   // Finally delete all pointers
  }
  
  BOOL CSketcherDoc::OnNewDocument()
  {
          if (!CDocument::OnNewDocument())
                  return FALSE;
  
          // TODO: add reinitialization code here
          // (SDI documents will reuse this document)
  
          return TRUE;
  }
  
  // CSketcherDoc serialization
  
  void CSketcherDoc::Serialize(CArchive& ar)
  {
          if (ar.IsStoring())
          {
                  // TODO: add storing code here
          }
          else
          {
                  // TODO: add loading code here
          }
  }
  
  // CSketcherDoc diagnostics
  
  ifdef _DEBUG
  void CSketcherDoc::AssertValid() const
  {
          CDocument::AssertValid();
  }
  
  void CSketcherDoc::Dump(CDumpContext& dc) const
  {
          CDocument::Dump(dc);
  }
  endif //_DEBUG
  
  // CSketcherDoc commands
  
  void CSketcherDoc::OnColorBlack()
  {
       m_Color = BLACK;          // Set the drawing color to black
  }
  
  void CSketcherDoc::OnColorRed()
  {
       m_Color = RED;          // Set the drawing color to red
  }
  
  void CSketcherDoc::OnColorGreen()
  {
       m_Color = GREEN;          // Set the drawing color to green
  }
  
  void CSketcherDoc::OnColorBlue()
  {
       m_Color = BLUE;          // Set the drawing color to blue
  }
  
  void CSketcherDoc::OnElementLine()
  {
       m_Element = LINE;         // Set element type as a line
  }
  
  void CSketcherDoc::OnElementRectangle()
  {
       m_Element = RECTANGLE;         // Set element type as a rectangle
  }
  
  void CSketcherDoc::OnElementCircle()
  {
       m_Element = CIRCLE;         // Set element type as a circle
  }
  
  void CSketcherDoc::OnElementCurve()
  {
       m_Element = CURVE;         // Set element type as a curve
  }
  
  void CSketcherDoc::OnUpdateColorBlack(CCmdUI *pCmdUI)
  {
     // Set menu item Checked if the current color is black
     pCmdUI->SetCheck(m_Color==BLACK);
  }
  
  void CSketcherDoc::OnUpdateColorRed(CCmdUI *pCmdUI)
  {
     // Set menu item Checked if the current color is red
     pCmdUI->SetCheck(m_Color==RED);
  }
  
  void CSketcherDoc::OnUpdateColorGreen(CCmdUI *pCmdUI)
  {
       // Set menu item Checked if the current color is green
     pCmdUI->SetCheck(m_Color==GREEN);
  
  }
  
  void CSketcherDoc::OnUpdateColorBlue(CCmdUI *pCmdUI)
  {
     // Set menu item Checked if the current color is blue
     pCmdUI->SetCheck(m_Color==BLUE);
  }
  
  void CSketcherDoc::OnUpdateElementLine(CCmdUI *pCmdUI)
  {
       // Set Checked if the current element is a circle
     pCmdUI->SetCheck(m_Element==LINE);
  }
  
  void CSketcherDoc::OnUpdateElementRectangle(CCmdUI *pCmdUI)
  {
     // Set Checked if the current element is a rectangle
     pCmdUI->SetCheck(m_Element==RECTANGLE);
  }
  
  void CSketcherDoc::OnUpdateElementCircle(CCmdUI *pCmdUI)
  {
     // Set Checked if the current element is a circle
     pCmdUI->SetCheck(m_Element==CIRCLE);
  }
  
  void CSketcherDoc::OnUpdateElementCurve(CCmdUI *pCmdUI)
  {
     // Set Checked if the current element is a curve
     pCmdUI->SetCheck(m_Element==CURVE);
  }
  
  void CSketcherDoc::DeleteElement(CElement* pElement)
  {
    if(pElement)
    {
      // If the element pointer is valid,
      // find the pointer in the list and delete it
      POSITION aPosition = m_ElementList.Find(pElement);
      m_ElementList.RemoveAt(aPosition);
      delete pElement;                   // Delete the element from the heap
    }
  }
  
  void CSketcherDoc::SendToBack(CElement* pElement)
  {
    if(pElement)
    {
      // If the element pointer is valid,
      // find the pointer in the list and remove the element
      POSITION aPosition = m_ElementList.Find(pElement);
      m_ElementList.RemoveAt(aPosition);
  
      m_ElementList.AddTail(pElement);  // Put it back to the end of the list
    }
  }