ht.cpp

改程序为积分计算器

// HT.cpp : implementation file
//

#include "stdafx.h"
#include "JSQ.h"
#include "HT.h"
#include "math.h"

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

/////////////////////////////////////////////////////////////////////////////
// HT dialog


HT::HT(CWnd* pParent /*=NULL*/)
	: CDialog(HT::IDD, pParent)
{
	//{{AFX_DATA_INIT(HT)
		// NOTE: the ClassWizard will add member initialization here
	m_edit_x1 = 0.0;//初始画图左区间
	m_edit_x2 = 0.0;//初始画图右区间
	m_s = _T("");

	//}}AFX_DATA_INIT
}


void HT::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(HT)
		// NOTE: the ClassWizard will add DDX and DDV calls here
 	DDX_Text(pDX, IDC_EDIT_X1, m_edit_x1);
    DDX_Text(pDX, IDC_EDIT_X2, m_edit_x2);
	DDX_Text(pDX, IDC_EDIT1, m_s);
 // //   	DDX_Text(pDX, IDC_A_EDIT2, m_lq);
///	 //   DDX_Text(pDX, IDC_B_EDIT4, m_rq);
	//}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(HT, CDialog)
	//{{AFX_MSG_MAP(HT)
		// NOTE: the ClassWizard will add message map macros here
	ON_BN_CLICKED(IDC_FFRUN, OnFfrun)
////	ON_WM_PAINT()
	ON_BN_CLICKED(IDC_CLEAR, OnClear)
    ON_BN_CLICKED(IDCANCEL, OnCancel)
	ON_WM_MOUSEMOVE()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// HT message handlers
double HT::f(double x)
 {
  	double f=sin(x)/x;
 	return f;
}


void HT::OnFfrun() 
{	 
	// TODO: Add your control notification handler code here
   // bool w;
    int xmax=530;//
	int xmin=30;
	int ymax=250;
	int ymin=30;
	double h=0.01;

    min=99999,max=-99999;//draw中定义

    UpdateData(true);
	CClientDC c(this);
	CPen draw;
	draw.CreatePen(0,1,RGB(0,0,255));
	c.SelectObject(draw);
	
	//绘制横纵轴
	c.MoveTo((xmax+xmin)/2,ymin);
	c.LineTo((xmax+xmin)/2,ymax);
	c.MoveTo(xmin,(ymax+ymin)/2);
	c.LineTo(xmax,(ymax+ymin)/2);

    
	XB=(xmax-xmin)/(m_edit_x2-m_edit_x1);
    double t=m_edit_x1;
	while(t+0.01<m_edit_x2)
	{
		double j;
		j=f(t+h);
		if(j<min)
		{
			min=j;
		}
		if(j>max)
		{
			max=j;
		}
		t=t+h;
	}
    YB=(ymax-ymin)/(max-min);
    
	//绘制坐标
    CString te1,te2;

	te1.Format("%3.2f",m_edit_x1);
	te2.Format("%3.2f",(min+max)/2);
	c.TextOut(50,130,"("+te1+","+te2+")");

	te1.Format("%3.2f",m_edit_x2);
	c.TextOut(350,130,"("+te1+","+te2+")");

	te1.Format("%3.2f",max);
	te2.Format("%3.2f",(m_edit_x1+m_edit_x2)/2);
	c.TextOut(240,30,"("+te2+","+te1+")");

	te1.Format("%3.2f",min);
	c.TextOut(240,200,"("+te2+","+te1+")");

	te1.Format("%3.2f",(max+min)/2);
	c.TextOut(200,130,"("+te2+","+te1+")");


    
	//c.TextOut(200,130,"("+te2+","+te1+")");

	double t1=m_edit_x1;
	while(xmin+1<xmax)
	{
		c.MoveTo((int)(xmin),(int)(ymax-(f(t1)-min)*YB));
		c.LineTo((int)(xmin+1),(int)(ymax-(f(t1+1/XB)-min)*YB));
		xmin++;
		t1=t1+1/XB;
	}

//	w=false;
	//UpdateData(FALSE);
	
}

void HT::OnClear() 
{
	// TODO: Add your control notification handler code here
CClientDC s(this);
s.FillSolidRect(20,20,535,250,RGB(255,255,255));
		//((CListBox*)GetDlgItem(IDC_STATIC))->ResetContent();




	/*
	// TODO: Add your control notification handler code here

	CDC *pDC;
	pDC=GetDC();
	
	////////////////////
	CRect rect;
	
	GetClientRect(&rect);
	/////////////////
	pDC->SelectStockObject(WHITE_BRUSH);
	pDC->Rectangle(rect.left,rect.top,rect.right-1,rect.bottom-90);
	
	pDC->MoveTo(rect.left,(rect.top-rect.bottom+75)/2+rect.bottom-90);
	pDC->LineTo(rect.right-1,(rect.top-rect.bottom+75)/2+rect.bottom-90);

  */

}

void HT::OnMouseMove(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	UpdateData(TRUE);
	CDialog::OnMouseMove(nFlags, point);
	CString tem;
	tem.Format("%d,%d",point.x,point.y);
	m_s=tem;
	UpdateData(FALSE);
}