MFC实现Static控件双击最大化，再双击还原功能

【实例截图】

【核心代码】

// MaxStaticDlg.cpp : implementation file
//

#include "stdafx.h"
#include "MaxStatic.h"
#include "MaxStaticDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CMaxStaticDlg dialog

CMaxStaticDlg::CMaxStaticDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CMaxStaticDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CMaxStaticDlg)
		// 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 CMaxStaticDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CMaxStaticDlg)
	DDX_Control(pDX, IDC_STATIC_VIDEO, m_videoWnd);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CMaxStaticDlg, CDialog)
	//{{AFX_MSG_MAP(CMaxStaticDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_WM_LBUTTONDBLCLK()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMaxStaticDlg message handlers

BOOL CMaxStaticDlg::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
	m_bFullScreen = FALSE;
		
	HWND hParentWnd[2]={m_hWnd,m_videoWnd.m_hWnd};

	GetDlgItem(IDC_STATIC_VIDEO)->GetWindowRect(m_rcWnd);
	
	ScreenToClient(m_rcWnd);
	
	m_rcScreen=CRect(0,0,GetSystemMetrics(SM_CXSCREEN),GetSystemMetrics(SM_CYSCREEN));

	SetParentWnd(hParentWnd, 2);
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CMaxStaticDlg::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 CMaxStaticDlg::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 CMaxStaticDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}
BOOL CMaxStaticDlg::IsInWnd(CPoint point)
{
	CRect rc;
	GetDlgItem(IDC_STATIC_VIDEO)->GetWindowRect(&rc);
	ScreenToClient(&rc);
	if (PtInRect(&rc,point))
	{
		return TRUE;
	}
	else
	{
		return FALSE;
	}
}
/*********************************************************
Function:	ShowFullScreen
Desc:		全频播放	
Input:			
Output:	
Return:	
**********************************************************/

void CMaxStaticDlg::ShowFullScreen()
{
	CRect rc,rcClient;
	::GetWindowRect(m_hPareDlgWnd,m_rcPareDlg);

	::GetWindowRect(m_hPareTabWnd,m_rcPareTab);
	::ScreenToClient(m_hPareDlgWnd,(POINT*)(&m_rcPareTab));
	::ScreenToClient(m_hPareDlgWnd,(POINT*)(&m_rcPareTab) 1);

	::GetWindowRect(m_hWnd,m_rcParent);
	::ScreenToClient(m_hPareTabWnd,(POINT*)(&m_rcParent));
	::ScreenToClient(m_hPareTabWnd,(POINT*)(&m_rcParent) 1);


	::SetWindowPos(m_hPareDlgWnd,NULL,m_rcScreen.left-SCREEN_EDGE,m_rcScreen.top-SCREEN_EDGE,m_rcScreen.Width() 2*SCREEN_EDGE,m_rcScreen.Height() 2*SCREEN_EDGE,SWP_SHOWWINDOW);

	::GetClientRect(m_hPareDlgWnd,rc);
	::SetWindowPos(m_hPareTabWnd,NULL,rc.left,rc.top,rc.Width(),rc.Height(),SWP_SHOWWINDOW);

	::GetClientRect(m_hPareTabWnd,rc);
	::SetWindowPos(m_hWnd,NULL,rc.left,rc.top,rc.Width(),rc.Height(),SWP_SHOWWINDOW);

	GetDlgItem(IDC_STATIC_VIDEO)->GetClientRect(rcClient);
	GetDlgItem(IDC_STATIC_VIDEO)->GetWindowRect(rc);
	int iEdge=(rc.Width()-rcClient.Width())/2;
	rc=m_rcScreen;
	rc.left-=iEdge;
	rc.right =iEdge;
	rc.top-=iEdge;
	rc.bottom =iEdge;
	this->ScreenToClient(rc);
	::SetWindowPos(GetDlgItem(IDC_STATIC_VIDEO)->m_hWnd,NULL,rc.left,rc.top,rc.Width(),rc.Height(),SWP_SHOWWINDOW);
	//Invalidate(FALSE);

	UpdateWindow();
}

/*********************************************************
Function:	ShowNormal
Desc:		退出全频播放	
Input:			
Output:	
Return:	
**********************************************************/
void CMaxStaticDlg::ShowNormal()
{

	GetDlgItem(IDC_STATIC_VIDEO)->SetWindowPos(NULL,m_rcWnd.left,m_rcWnd.top,m_rcWnd.Width(),m_rcWnd.Height(),SWP_SHOWWINDOW);
	::SetWindowPos(m_hWnd,NULL,m_rcParent.left,m_rcParent.top,m_rcParent.Width(),m_rcParent.Height(),SWP_SHOWWINDOW);
	::SetWindowPos(m_hPareTabWnd,NULL,m_rcPareTab.left,m_rcPareTab.top,m_rcPareTab.Width(),m_rcPareTab.Height(),SWP_SHOWWINDOW);
	::SetWindowPos(m_hPareDlgWnd,NULL,m_rcPareDlg.left,m_rcPareDlg.top,m_rcPareDlg.Width(),m_rcPareDlg.Height(),SWP_SHOWWINDOW);

	UpdateWindow();
}

void CMaxStaticDlg::OnLButtonDblClk(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	if ((IsInWnd(point)) )
	{
		m_bFullScreen=!m_bFullScreen;
		//g_pMainDlg->FullScreen(m_bFullScreen);
		if (m_bFullScreen)
		{
			ShowFullScreen();
		}
		else
		{
			ShowNormal();
		}
	}
	CDialog::OnLButtonDblClk(nFlags, point);
}
void CMaxStaticDlg::SetParentWnd(HWND *hhWnd, int iParentNum)
{
	VERIFY(iParentNum==2);
	m_hPareDlgWnd=hhWnd[0];
	m_hPareTabWnd=hhWnd[1];
}