ex_randicondlg.cpp

Visual C++应用教程-源代码 本书在复习C++基础知识后

// Ex_RandIconDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Ex_RandIcon.h"
#include "Ex_RandIconDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CEx_RandIconDlg dialog

CEx_RandIconDlg::CEx_RandIconDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CEx_RandIconDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CEx_RandIconDlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CEx_RandIconDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CEx_RandIconDlg)
	DDX_Control(pDX, IDC_STATIC_3, m_wndIcon3);
	DDX_Control(pDX, IDC_STATIC_2, m_wndIcon2);
	DDX_Control(pDX, IDC_STATIC_1, m_wndIcon1);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CEx_RandIconDlg, CDialog)
	//{{AFX_MSG_MAP(CEx_RandIconDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON_START, OnButtonStart)
	ON_WM_TIMER()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CEx_RandIconDlg message handlers

BOOL CEx_RandIconDlg::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 CEx_RandIconDlg::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 CEx_RandIconDlg::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 CEx_RandIconDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CEx_RandIconDlg::OnButtonStart() 
{
	static	bool bStart = FALSE;

	bStart	= !bStart;
	CWnd *pBtn	= GetDlgItem( IDC_BUTTON_START );
	if ( bStart )		// 开始
	{
		pBtn->SetWindowText( "停止" );
		SetTimer( 1, 100, NULL );

	} else
	{
		pBtn->SetWindowText( "开始" );
		KillTimer( 1 );

		HICON	hAicon	= m_wndIcon1.GetIcon();
		HICON	hBicon	= m_wndIcon2.GetIcon();
		HICON	hCicon	= m_wndIcon3.GetIcon();

		if (( hAicon == hBicon ) && ( hAicon == hCicon ))
			MessageBox( "恭喜你！" );
		else
			MessageBox( "失败！" );
	}
}

void CEx_RandIconDlg::OnTimer(UINT nIDEvent) 
{
	// TODO: Add your message handler code here and/or call default
	UINT nIDs[] = { IDI_ICON1, IDI_ICON2, IDI_ICON3 };

	srand((unsigned)time( NULL ));	// 启动随机种子
	// 获取小于3的随机数
	int nAindex = rand() % 3;
	int nBindex = rand() % 3;
	int nCindex = rand() % 3;

	HICON	hAicon	= AfxGetApp()->LoadIcon( nIDs[nAindex] );
	HICON	hBicon	= AfxGetApp()->LoadIcon( nIDs[nBindex] );
	HICON	hCicon	= AfxGetApp()->LoadIcon( nIDs[nCindex] );

	HICON	hAtemp	= m_wndIcon1.SetIcon( hAicon );
	::DestroyIcon( hAtemp );
	hAtemp	= m_wndIcon2.SetIcon( hBicon );
	::DestroyIcon( hAtemp );
	hAtemp	= m_wndIcon3.SetIcon( hCicon );
	::DestroyIcon( hAtemp );
	
	CDialog::OnTimer(nIDEvent);
}