curveview.cpp

mfc例题与练习第二版 例题与练习第二版

// CurveView.cpp : implementation file
//

#include "stdafx.h"
#include "Ex3_4.h"
#include "Ex3_4Doc.h"
#include "CurveView.h"

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

/////////////////////////////////////////////////////////////////////////////
// CCurveView

IMPLEMENT_DYNCREATE(CCurveView, CView)

CCurveView::CCurveView()
{
}

CCurveView::~CCurveView()
{
}


BEGIN_MESSAGE_MAP(CCurveView, CView)
	//{{AFX_MSG_MAP(CCurveView)
		// NOTE - the ClassWizard will add and remove mapping macros here.
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CCurveView drawing

void CCurveView::OnDraw(CDC* pDC)
{
	CEx3_4Doc* pDoc = (CEx3_4Doc* )GetDocument();
	// TODO: add draw code here
	 int cxDot,cxDotSpacing,cyDot, cxGraph,cyGraph, x,y, i;
     RECT rc;

     CPen   pen (PS_SOLID, 0, RGB(0, 0, 255)); // red pen
//     CBrush brush(RGB(255, 0, 0));             // red brush
  //   CBrush* pOldBrush = pDC->SelectObject(&brush);
     CPen*   pOldPen = pDC->SelectObject(&pen);

     cxGraph = 100;
     cyGraph = DATAMAX;  // defined in resource.h

     this->GetClientRect(&rc);
     pDC->SetMapMode(MM_ANISOTROPIC);
     pDC->SetWindowOrg(0, 0);
     pDC->SetViewportOrg(30, rc.bottom-10);
     pDC->SetWindowExt(cxGraph, cyGraph);
     pDC->SetViewportExt(rc.right-20, -(rc.bottom-20));

     // ┮