eightqueendlg.cpp

8皇后演示程序

// EightQueenDlg.cpp : implementation file
//

#include "stdafx.h"
#include "EightQueen.h"
#include "EightQueenDlg.h"
#include ".\eightqueendlg.h"

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


HANDLE g_hQhandle = NULL;
BOOL   g_bThreadQuit = FALSE;
HANDLE g_hSeqshow = NULL;
BOOL   g_bSeqshow = TRUE;
/////////////////////////////////////////////////////////////////////////////
// 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()

/////////////////////////////////////////////////////////////////////////////
// CEightQueenDlg dialog

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

	m_nNumofQueens = 0;
	m_nSumofQueens = 8;
	m_nShowQueenindex = 0;
	m_pQueenArray = new int[8];
	m_bStartCount = FALSE;
}

CEightQueenDlg::~CEightQueenDlg()
{
	if(m_pQueenArray)
	{
		delete []m_pQueenArray;
		m_pQueenArray = NULL;
	}
}

void CEightQueenDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CEightQueenDlg)
	DDX_Control(pDX, IDC_QUEEN_STATIC, m_QueenStatic);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CEightQueenDlg, CDialog)
	//{{AFX_MSG_MAP(CEightQueenDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_EN_KILLFOCUS(IDC_SUMQUEEN_EDIT, OnKillfocusSumqueenEdit)
	ON_BN_CLICKED(IDC_STEPCOUNT_BTN, OnStepcountBtn)
	ON_BN_CLICKED(IDC_SEQUENCECOUNT_BTN, OnSequenceCountBtn)
	ON_BN_CLICKED(IDC_BEGINCOUNT_BTN, OnBeginCountBtn)
	ON_BN_CLICKED(IDC_RESHOW_BTN, OnReShowBtn)
	//}}AFX_MSG_MAP
	ON_STN_CLICKED(IDC_QUEEN_STATIC, OnStnClickedQueenStatic)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CEightQueenDlg message handlers

BOOL CEightQueenDlg::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
	
	SetDlgItemText(IDC_SUMQUEEN_EDIT, "8");
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CEightQueenDlg::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 CEightQueenDlg::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 CEightQueenDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

/**************************计算皇后位置的线程**************************/
UINT CEightQueenDlg::GetQueenThread(LPVOID pThis)
{
	CEightQueenDlg *This = (CEightQueenDlg *)pThis;
	
	This->GetQueenSpace(0);
	
	SetEvent(g_hQhandle);
	AfxEndThread(0);
	return 0;
}

/**************************递归计算皇后位置**************************/
void CEightQueenDlg::GetQueenSpace(int index)
{
	if(g_bThreadQuit)
	{
		return ;
	}
	if(index == m_nSumofQueens)
	{
		for(int i = 0; i < m_nSumofQueens; i++)
			m_pQueenArrays[m_nNumofQueens][i] = m_pQueenArray[i];
		m_nNumofQueens++;
		CString t_cs;
		t_cs.Format("共%d条结果", m_nNumofQueens);
		GetDlgItem(IDC_SUMANSWER_STATIC)->SetWindowText(t_cs);
		return ;
	}
	for(int i = 0; i < m_nSumofQueens; i++)
	{
		if(IsQueenRight(index, i))
		{
			m_pQueenArray[index] = i;
			GetQueenSpace(index + 1);
		}
	}
}

BOOL CEightQueenDlg::IsQueenRight(int index, int value)
{
	for(int i = 0; i < index; i++)
	{
		if(m_pQueenArray[i] == value || abs(index - i) == abs(m_pQueenArray[i] - value))
			return FALSE;
	}
	return TRUE;
}

void CEightQueenDlg::OnKillfocusSumqueenEdit() 
{
	CString str;
	GetDlgItem(IDC_SUMQUEEN_EDIT)->GetWindowText(str);
	int sum = atoi(str);

	
	//4以下没有成立的结果，12以上计算的结果不能存储到m_pQueenArray数组中去
	if(sum < 4 || sum > 12) 
	{
		MessageBox("输入数据不在许可范围内，请重新输入！");
		str.Format("%d", m_nSumofQueens);
		GetDlgItem(IDC_SUMQUEEN_EDIT)->SetWindowText(str);
		return ;
	}

	GetDlgItem(IDC_BEGINCOUNT_BTN)->EnableWindow(TRUE);
	m_nSumofQueens = sum;
	m_nNumofQueens = 0;
	m_nShowQueenindex = 0;
	m_bStartCount = FALSE;
	
	delete []m_pQueenArray;
	m_pQueenArray = new int[m_nSumofQueens];
	ASSERT(m_pQueenArray);
	
	m_QueenStatic.SetNumofQueens(m_nSumofQueens);
}

void CEightQueenDlg::OnStepcountBtn() 
{
	if(g_bSeqshow)
	{
		g_bSeqshow = FALSE;	
	}

	if(m_nShowQueenindex >= m_nNumofQueens)
	{
		GetDlgItem(IDC_STEPCOUNT_BTN)->SetWindowText("单步");
		return ;
	}
	GetDlgItem(IDC_STEPCOUNT_BTN)->SetWindowText("下一步");
	CString t_cs;
	t_cs.Format("第%d个结果", m_nShowQueenindex + 1);
	GetDlgItem(IDC_SHOWANSWER_STATIC)->SetWindowText(t_cs);
	m_QueenStatic.GetQueenPlace(m_pQueenArrays[m_nShowQueenindex++]);
}

/**************************显示皇后所在位置线程**************************/
UINT CEightQueenDlg::ShowSequenceQueen(LPVOID pThis)
{
	CEightQueenDlg *This = (CEightQueenDlg *)pThis;
	g_bSeqshow = TRUE;
	while(This->m_nShowQueenindex < This->m_nNumofQueens && g_bSeqshow)
	{
		CString t_cs;
		t_cs.Format("第%d个结果", This->m_nShowQueenindex + 1);
		This->GetDlgItem(IDC_SHOWANSWER_STATIC)->SetWindowText(t_cs);
		This->m_QueenStatic.GetQueenPlace(This->m_pQueenArrays[This->m_nShowQueenindex++]);
		Sleep(200);
	}

	SetEvent(g_hSeqshow);
	AfxEndThread(0);
	return 0;
}

void CEightQueenDlg::OnSequenceCountBtn() 
{
	if(g_bSeqshow || m_nShowQueenindex >= m_nNumofQueens)
		return ;
	g_bSeqshow = TRUE;
	GetDlgItem(IDC_STEPCOUNT_BTN)->SetWindowText("单步");
	g_hSeqshow = CreateEvent(NULL, FALSE, FALSE, NULL);
	AfxBeginThread(&ShowSequenceQueen, this);
}

void CEightQueenDlg::OnBeginCountBtn() 
{
	GetDlgItem(IDC_BEGINCOUNT_BTN)->EnableWindow(FALSE);
	m_bStartCount = TRUE;
	g_bThreadQuit = TRUE;

	//确保线程结束
	if(g_hQhandle != NULL)
	{
		WaitForSingleObject(g_hQhandle, INFINITE);
		g_hQhandle = NULL;
	}
	if(g_hSeqshow != NULL)
	{
		WaitForSingleObject(g_hSeqshow, INFINITE);
		g_hSeqshow = NULL;
	}
	
	g_bThreadQuit = FALSE;
	g_bSeqshow = TRUE;
	g_hQhandle = CreateEvent(NULL, FALSE, FALSE, NULL);
	g_hSeqshow = CreateEvent(NULL, FALSE, FALSE, NULL);

	GetDlgItem(IDC_SUMANSWER_STATIC)->SetWindowText("计算中...");
	GetDlgItem(IDC_SHOWANSWER_STATIC)->SetWindowText("第...个结果");
	GetDlgItem(IDC_STEPCOUNT_BTN)->SetWindowText("单步");
	AfxBeginThread(&GetQueenThread, this);
	AfxBeginThread(&ShowSequenceQueen, this);
}

void CEightQueenDlg::OnReShowBtn() 
{
	
	if(!m_bStartCount)
		return ;
	GetDlgItem(IDC_RESHOW_BTN)->EnableWindow(FALSE);
	g_bSeqshow = FALSE;
	if(g_hSeqshow != NULL)
	{
		WaitForSingleObject(g_hSeqshow, INFINITE);
		g_hSeqshow = NULL;
	}
	
	m_nShowQueenindex = 0;
	GetDlgItem(IDC_STEPCOUNT_BTN)->SetWindowText("单步");

	g_hSeqshow = CreateEvent(NULL, FALSE, FALSE, NULL);
	AfxBeginThread(&ShowSequenceQueen, this);
	GetDlgItem(IDC_RESHOW_BTN)->EnableWindow(TRUE);
}

void CEightQueenDlg::OnStnClickedQueenStatic()
{
	// TODO: 在此添加控件通知处理程序代码
}