www.gusucode.com > VC++ douglas道格拉斯算法示例-源码程序 > VC++ douglas道格拉斯算法示例-源码程序/code/douglasView.cpp

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// douglasView.cpp : implementation of the CDouglasView class
//

#include "stdafx.h"
#include "douglas.h"
#include "myAPI.h"

#include "douglasDoc.h"
#include "douglasView.h"

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

/////////////////////////////////////////////////////////////////////////////
// CDouglasView

IMPLEMENT_DYNCREATE(CDouglasView, CView)

BEGIN_MESSAGE_MAP(CDouglasView, CView)
	//{{AFX_MSG_MAP(CDouglasView)
	ON_COMMAND(ID_DOUGLAS, OnDouglas)
	ON_UPDATE_COMMAND_UI(ID_DOUGLAS, OnUpdateDouglas)
	//}}AFX_MSG_MAP
	// Standard printing commands
	ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CDouglasView construction/destruction

CDouglasView::CDouglasView()
{
	// TODO: add construction code here
	m_douglas=false;
}

CDouglasView::~CDouglasView()
{
}

BOOL CDouglasView::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CDouglasView drawing

void CDouglasView::OnDraw(CDC* pDC)
{
	CDouglasDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);

	if(pDoc->m_bIsLoaded)
	{
		pDoc->m_douglas->Draw(pDC);
		if(m_douglas==true)
		{
			CUIntArray aPtNum;
			for(int i=0;i<pDoc->m_douglas->m_LineArray.GetSize();i++)
			{
				CMyLine* pLine=pDoc->m_douglas->m_LineArray.GetAt(i);
			    POINT* m_PointList;
				int nPt=pLine->m_Points.GetSize();
				m_PointList = new POINT [nPt];
				for(int j=0;j<pLine->m_Points.GetSize();j++)
				{
					m_PointList[j].x=pLine->m_Points.GetAt(j).x;
					m_PointList[j].y=pLine->m_Points.GetAt(j).y;
				}
				DouglasPeuckerDataCompress(m_PointList,nPt,aPtNum,100);

				CPen m_pen;
				CPen * pPen;
				m_pen.CreatePen(PS_SOLID,1,RGB(100,100,100));
				pPen=pDC->SelectObject(&m_pen);
				POINT ptstart=m_PointList[aPtNum.GetAt(0)];
				pDC->MoveTo(ptstart.x,ptstart.y);  
				for(int m=0;m<aPtNum.GetSize();m++)
				{
					POINT pt=m_PointList[aPtNum.GetAt(m)];
					pDC->LineTo(pt.x,pt.y);
				}
				pDC->SelectObject(pPen);
				m_pen.DeleteObject();
			}
		}
	}
	// TODO: add draw code for native data here
}

/////////////////////////////////////////////////////////////////////////////
// CDouglasView printing

BOOL CDouglasView::OnPreparePrinting(CPrintInfo* pInfo)
{
	// default preparation
	return DoPreparePrinting(pInfo);
}

void CDouglasView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add extra initialization before printing
}

void CDouglasView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add cleanup after printing
}

/////////////////////////////////////////////////////////////////////////////
// CDouglasView diagnostics

#ifdef _DEBUG
void CDouglasView::AssertValid() const
{
	CView::AssertValid();
}

void CDouglasView::Dump(CDumpContext& dc) const
{
	CView::Dump(dc);
}

CDouglasDoc* CDouglasView::GetDocument() // non-debug version is inline
{
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CDouglasDoc)));
	return (CDouglasDoc*)m_pDocument;
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CDouglasView message handlers

void CDouglasView::OnPrepareDC(CDC* pDC, CPrintInfo* pInfo) 
{
	// TODO: Add your specialized code here and/or call the base class
	CDouglasDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);

	CRect rc;
	GetClientRect(&rc);
    pDC->SetMapMode(MM_ISOTROPIC);
	pDC->SetViewportOrg((rc.left+rc.right)/2,(rc.top+rc.bottom)/2);
	pDC->SetWindowOrg(pDoc->m_WindowOrgX,pDoc->m_WindowOrgY);
	pDC->SetViewportExt(rc.Width()+50,-rc.Height()+50);
	pDC->SetWindowExt(pDoc->m_MapSize.cx, pDoc->m_MapSize.cy);

	CView::OnPrepareDC(pDC, pInfo);
}

void CDouglasView::OnDouglas() 
{
	// TODO: Add your command handler code here
	m_douglas=true;
	Invalidate();
}

void CDouglasView::OnUpdateDouglas(CCmdUI* pCmdUI) 
{
	// TODO: Add your command update UI handler code here
	
}