// SDocDemoDoc.cpp : implementation of the CSDocDemoDoc class
//

#include "stdafx.h"
#include "SDocDemo.h"

#include "SDocDemoDoc.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CSDocDemoDoc

IMPLEMENT_DYNCREATE(CSDocDemoDoc, CDocument)

BEGIN_MESSAGE_MAP(CSDocDemoDoc, CDocument)
	//{{AFX_MSG_MAP(CSDocDemoDoc)
	ON_COMMAND(ID_UNDO, OnUndo)
	ON_UPDATE_COMMAND_UI(ID_UNDO, OnUpdateUndo)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CSDocDemoDoc construction/destruction

CSDocDemoDoc::CSDocDemoDoc()
{
	// TODO: add one-time construction code here

}

CSDocDemoDoc::~CSDocDemoDoc()
{
}

BOOL CSDocDemoDoc::OnNewDocument()
{
	if (!CDocument::OnNewDocument())
		return FALSE;

	// TODO: add reinitialization code here
	// (SDI documents will reuse this document)

	return TRUE;
}



/////////////////////////////////////////////////////////////////////////////
// CSDocDemoDoc serialization

void CSDocDemoDoc::Serialize(CArchive& ar)
{
	if (ar.IsStoring())
	{
		// TODO: add storing code here
		m_lineArray.Serialize(ar);
	}
	else
	{
		// TODO: add loading code here
		m_lineArray.Serialize(ar);
	}
}

/////////////////////////////////////////////////////////////////////////////
// CSDocDemoDoc diagnostics

#ifdef _DEBUG
void CSDocDemoDoc::AssertValid() const
{
	CDocument::AssertValid();
}

void CSDocDemoDoc::Dump(CDumpContext& dc) const
{
	CDocument::Dump(dc);
}


void CSDocDemoDoc::AddLine(int StartX,int StartY,int EndX,int EndY)//添加線條
{
	CLineDraw *pLine=new CLineDraw(StartX,StartY,EndX,EndY);
	m_lineArray.Add(pLine);//加入數(shù)組類
	SetModifiedFlag();
}

CLineDraw *CSDocDemoDoc::GetLine(int index)
{
	if(index<0||index>m_lineArray.GetUpperBound())//無效的線條
		return 0;
	return (CLineDraw *)m_lineArray.GetAt(index);//從數(shù)組中獲取線條指針
}

int CSDocDemoDoc::GetTotalLine()
{
	return m_lineArray.GetSize();//數(shù)組中存儲(chǔ)的線條數(shù)目
}



#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CSDocDemoDoc commands

void CSDocDemoDoc::DeleteContents() 
{
	// TODO: Add your specialized code here and/or call the base class
	int index;
	index=m_lineArray.GetSize();//獲取線條的數(shù)目
	while(index--)
		delete m_lineArray.GetAt(index);//刪除數(shù)組元素
	m_lineArray.RemoveAll();//刪除數(shù)組對(duì)象	
	CDocument::DeleteContents();
}

void CSDocDemoDoc::OnUndo() 
{
	// TODO: Add your command handler code here
	int index;
	index=m_lineArray.GetUpperBound();//獲取數(shù)組最后的元素
	if(index>=0)
	{
		delete m_lineArray.GetAt(index);
		m_lineArray.RemoveAt(index);//刪除線條
	}
	UpdateAllViews(NULL);
	SetModifiedFlag();
}

void CSDocDemoDoc::OnUpdateUndo(CCmdUI* pCmdUI) 
{
	// TODO: Add your command update UI handler code here
	pCmdUI->Enable(m_lineArray.GetSize());//只有線條數(shù)組不為空菜單命令項(xiàng)才有效
}