h_throwdlg.cpp

演示物理学中的平抛运动过程

// H_THROWDlg.cpp : implementation file
//

#include "stdafx.h"
#include "H_THROW.h"
#include "H_THROWDlg.h"
#include "Show.h"

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

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CAboutDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CH_THROWDlg dialog

CH_THROWDlg::CH_THROWDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CH_THROWDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CH_THROWDlg)
	m_v = 0;
	m_h = 0;
	index=1;
	tim=0;
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CH_THROWDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CH_THROWDlg)
	DDX_Text(pDX, IDC_V, m_v);
	DDX_Text(pDX, IDC_H, m_h);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CH_THROWDlg, CDialog)
	//{{AFX_MSG_MAP(CH_THROWDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_WM_CREATE()
	ON_BN_CLICKED(IDC_BEG, OnBeg)
	ON_BN_CLICKED(IDC_RES, OnRes)
	ON_WM_TIMER()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CH_THROWDlg message handlers

BOOL CH_THROWDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	// TODO: Add extra initialization here

	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CH_THROWDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CH_THROWDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}

}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CH_THROWDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

int CH_THROWDlg::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
	if (CDialog::OnCreate(lpCreateStruct) == -1)
		return -1;
	
	// TODO: Add your specialized creation code here
	
	return 0;
}

void CH_THROWDlg::OnBeg() 
{
	// TODO: Add your control notification handler code here
	
	UpdateData();
	if(m_v==0)
		MessageBox("请输入初速度");
	else if(m_h==0)
		MessageBox("请输入高度");
	else
	tim=SetTimer(1,100,NULL);
	CString str;
	if(GetDlgItemText((IDC_BEG),str),str=="开始" && m_v!=0 && m_h!=0)
	{
		SetDlgItemText(IDC_BEG,"重复一次");
	}
	else
		index=1;
}

void CH_THROWDlg::OnRes() 
{
	// TODO: Add your control notification handler code here
	SetDlgItemText(IDC_BEG,"开始");

	RedrawWindow();

	CClientDC dc(GetDlgItem(IDC_SHOW));
	dc.MoveTo(30,60);
	dc.LineTo(60,60);
	dc.MoveTo(60,60);
	dc.LineTo(60,300);
	dc.MoveTo(60,300);
	dc.LineTo(270,300);
	
	CPen pen(PS_SOLID,1,RGB(0,0,0));
	dc.SelectObject(&pen);
	CBrush *pBrush=CBrush::FromHandle((HBRUSH)GetStockObject(BLACK_BRUSH));
	dc.SelectObject(pBrush);
	dc.Ellipse(40,40,60,60);

	index=1;
	m_v=0;
	m_h=0;
	UpdateData(FALSE);
	KillTimer(tim);
}



void CH_THROWDlg::OnTimer(UINT nIDEvent) 
{
	// TODO: Add your message handler code here and/or call default
		
	CClientDC dc(GetDlgItem(IDC_SHOW));
//	UpdateData();

	if(index==1)
	{
		CPen pen(PS_SOLID,1,RGB(0,0,0));
		dc.SelectObject(&pen);
		CBrush *pBrush=CBrush::FromHandle((HBRUSH)GetStockObject(BLACK_BRUSH));
		dc.SelectObject(pBrush);
		dc.Ellipse(40,40,60,60);
	}
	
	if(index==2)
	{
		UpdateData();
		dc.Ellipse(40,40,60,60);
		CPen pen(PS_SOLID,1,RGB(0,0,0));
		dc.SelectObject(&pen);
		CBrush *pBrush=CBrush::FromHandle((HBRUSH)GetStockObject(BLACK_BRUSH));
		dc.SelectObject(pBrush);
		dc.Ellipse(m_v*index+60,4.9*index*index+60,m_v*index+80,4.9*index*index+80);
	}
	
	if(index==3)
	{
		UpdateData();
		dc.Ellipse(m_v*(index-1)+60,4.9*(index-1)*(index-1)+60,m_v*(index-1)+80,4.9*(index-1)*(index-1)+80);
		CPen pen(PS_SOLID,1,RGB(0,0,0));
		dc.SelectObject(&pen);
		CBrush *pBrush=CBrush::FromHandle((HBRUSH)GetStockObject(BLACK_BRUSH));
		dc.SelectObject(pBrush);
		dc.Ellipse(m_v*index+60,4.9*index*index+60,m_v*index+80,4.9*index*index+80);
	}

	if(index==4)
	{
		UpdateData();
		dc.Ellipse(m_v*(index-1)+60,4.9*(index-1)*(index-1)+60,m_v*(index-1)+80,4.9*(index-1)*(index-1)+80);
		CPen pen(PS_SOLID,1,RGB(0,0,0));
		dc.SelectObject(&pen);
		CBrush *pBrush=CBrush::FromHandle((HBRUSH)GetStockObject(BLACK_BRUSH));
		dc.SelectObject(pBrush);
		dc.Ellipse(m_v*index+60,4.9*index*index+60,m_v*index+80,4.9*index*index+80);
	}

	if(index==5)
	{
		UpdateData();
		dc.Ellipse(m_v*(index-1)+60,4.9*(index-1)*(index-1)+60,m_v*(index-1)+80,4.9*(index-1)*(index-1)+80);
		CPen pen(PS_SOLID,1,RGB(0,0,0));
		dc.SelectObject(&pen);
		CBrush *pBrush=CBrush::FromHandle((HBRUSH)GetStockObject(BLACK_BRUSH));
		dc.SelectObject(pBrush);
		dc.Ellipse(m_v*index+60,4.9*index*index+60,m_v*index+80,4.9*index*index+80);
	}

	if(index==6)
	{
		UpdateData();
		dc.Ellipse(m_v*(index-1)+60,4.9*(index-1)*(index-1)+60,m_v*(index-1)+80,4.9*(index-1)*(index-1)+80);
		CPen pen(PS_SOLID,1,RGB(0,0,0));
		dc.SelectObject(&pen);
		CBrush *pBrush=CBrush::FromHandle((HBRUSH)GetStockObject(BLACK_BRUSH));
		dc.SelectObject(pBrush);
		dc.Ellipse(m_v*index+60,4.9*index*index+60,m_v*index+80,4.9*index*index+80);
	}

	if(index==7)
	{
		UpdateData();
		dc.Ellipse(m_v*(index-1)+60,4.9*(index-1)*(index-1)+60,m_v*(index-1)+80,4.9*(index-1)*(index-1)+80);
		CPen pen(PS_SOLID,1,RGB(0,0,0));
		dc.SelectObject(&pen);
		CBrush *pBrush=CBrush::FromHandle((HBRUSH)GetStockObject(BLACK_BRUSH));
		dc.SelectObject(pBrush);
		dc.Ellipse(m_v*index+60,4.9*index*index+40,m_v*index+80,4.9*index*index+60);
	}
	index++;

	CDialog::OnTimer(nIDEvent);
}