myview.cpp

VC面向对象的学习教程

// MyView.cpp : implementation of the CMyView class
//

#include "stdafx.h"
#include "My.h"

#include "MyDoc.h"
#include "MyView.h"

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

/////////////////////////////////////////////////////////////////////////////
// CMyView

IMPLEMENT_DYNCREATE(CMyView, CView)

BEGIN_MESSAGE_MAP(CMyView, CView)
	//{{AFX_MSG_MAP(CMyView)
		// NOTE - the ClassWizard will add and remove mapping macros here.
		//    DO NOT EDIT what you see in these blocks of generated code!
	//}}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()

/////////////////////////////////////////////////////////////////////////////
// CMyView construction/destruction

CMyView::CMyView()
{
	// TODO: add construction code here

}

CMyView::~CMyView()
{
}

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

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CMyView drawing

void CMyView::OnDraw(CDC* pDC)
{
	CMyDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	// TODO: add draw code for native data here

	const int xOrg = 50;
	const int yOrg = 350;
	const int xMax = 700;
	const int yMin = 20;

	//找出最大和最小
	double dbXMin = pDoc->m_dbXdata[0];
	double dbXMax = pDoc->m_dbXdata[0];
	double dbYMin = pDoc->m_dbYdata[0];
	double dbYMax = pDoc->m_dbYdata[0];

	for(int i=1; i<pDoc->iPt; i++)
	{
		pDoc->m_dbXdata[i]<dbXMin?dbXMin=pDoc->m_dbXdata[i]:
				pDoc->m_dbXdata[i]>dbXMax?dbXMax=pDoc->m_dbXdata[i]:dbXMax;
		pDoc->m_dbYdata[i]<dbYMin?dbYMin=pDoc->m_dbYdata[i]:
				pDoc->m_dbYdata[i]>dbYMax?dbYMax=pDoc->m_dbYdata[i]:dbYMax;
	}

	//调整最大最小值
	dbXMax = dbXMax + (dbXMax-dbXMin)/pDoc->iPt;
	dbXMin = dbXMin - (dbXMax-dbXMin)/pDoc->iPt;
	dbYMax = dbYMax + (dbYMax-dbYMin)/pDoc->iPt;
	dbYMin = dbYMin - (dbYMax-dbYMin)/pDoc->iPt;

	//换算数据并画出折线
	double dbXRatio = (xMax-xOrg)/(dbXMax-dbXMin);
	double dbYRatio = (yOrg-yMin)/(dbYMax-dbYMin);

	int x=(int) (dbXRatio * (pDoc->m_dbXdata[0]-dbXMin) + xOrg);
	int y=(int) (yOrg - dbYRatio * (pDoc->m_dbYdata[0]-dbYMin));
	pDC->MoveTo(x,y);

	for(i=1; i<pDoc->iPt; i++)
	{
		x = (int) (dbXRatio * (pDoc->m_dbXdata[i]-dbXMin) + xOrg);
		y = (int) (yOrg - dbYRatio * (pDoc->m_dbYdata[i]-dbYMin));
		pDC->LineTo(x,y);
	}

	//画轴
	pDC->MoveTo(xOrg,yOrg);
	pDC->LineTo(xMax,yOrg);
	pDC->MoveTo(xOrg,yOrg);
	pDC->LineTo(xOrg,yMin);

	//写轴标题
	x = (xMax-xOrg)/2;
	y = yOrg + 10;
	pDC->TextOut(x, y, "Force");

	x = xOrg - 20;
	y = (yOrg - yMin)/2;
	pDC->TextOut(x, y, "D");
	y += 15;
	pDC->TextOut(x, y, "i");
	y += 15;
	pDC->TextOut(x ,y, "p");

}

/////////////////////////////////////////////////////////////////////////////
// CMyView printing

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CMyView diagnostics

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CMyView message handlers