showdesktopdlg.cpp

利用托盘实现屏幕上所有窗口的最小化

// ShowDesktopDlg.cpp : implementation file
//

#include "stdafx.h"
#include "ShowDesktop.h"
#include "ShowDesktopDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CShowDesktopDlg dialog

CShowDesktopDlg::CShowDesktopDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CShowDesktopDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CShowDesktopDlg)
		// 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 CShowDesktopDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CShowDesktopDlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CShowDesktopDlg, CDialog)
	//{{AFX_MSG_MAP(CShowDesktopDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_WM_DESTROY()
	ON_WM_CREATE()
	//}}AFX_MSG_MAP
	ON_COMMAND(IDM_ABOUT, OnAbout)

ON_COMMAND(IDM_EXIT, OnExit)

ON_COMMAND(IDM_EXITWINDOWS, OnExitwindows)

ON_COMMAND(IDM_REBOOT, OnReboot)
ON_MESSAGE(UM_ICONNOTIFY, OnIconNotify)




END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CShowDesktopDlg message handlers

BOOL CShowDesktopDlg::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
	Inserticon();
	return TRUE;  // return TRUE  unless you set the focus to a control
}

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



void CShowDesktopDlg::OnDestroy() 
{
	CDialog::OnDestroy();
	
	// TODO: Add your message handler code here
	::RemoveProp(m_hWnd,AfxGetApp()->m_pszExeName);
	DeleteIcon();
	
}

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

{

ShowWindow(SW_HIDE);


long lExStyle = ::GetWindowLong(m_hWnd, GWL_EXSTYLE);

lExStyle &= ~WS_EX_APPWINDOW; // get rid of AppWindow ex-style

lExStyle |= WS_EX_TOOLWINDOW; // add ToolWindow ex-style

::SetWindowLong(m_hWnd, GWL_EXSTYLE, lExStyle);


ShowWindow(SW_SHOWNA);

}

void CShowDesktopDlg::Inserticon() 

{

// first minimize to hide window

ShowWindow(SW_MINIMIZE);


// hide its run icon button in taskbar

HideTaskBarButton();


// insert icon in taskbar

AddIcon();

}

BOOL CShowDesktopDlg::AddIcon()

{

// Add the notification icon to the taskbar

NOTIFYICONDATA nid;

nid.cbSize = sizeof(nid);

nid.hWnd = m_hWnd; 

nid.uID = IDR_MAINFRAME; 

nid.uFlags = NIF_MESSAGE | NIF_ICON | NIF_TIP;

nid.uCallbackMessage = UM_ICONNOTIFY;

nid.hIcon = m_hIcon;

CString str = "显示桌面";

lstrcpyn(nid.szTip, (LPCSTR)str, sizeof(nid.szTip) / sizeof(nid.szTip[0]));


return Shell_NotifyIcon(NIM_ADD, &nid);

}

BOOL CShowDesktopDlg::DeleteIcon()

{

// Remove the notification icon from the taskbar

NOTIFYICONDATA nid;

nid.cbSize = sizeof(nid);

nid.hWnd = m_hWnd;

nid.uID = IDR_MAINFRAME;


return Shell_NotifyIcon(NIM_DELETE, &nid);

}


void CShowDesktopDlg::OnIconNotify(WPARAM wParam, LPARAM lParam)

{

switch ((UINT)lParam)

{

case WM_LBUTTONDOWN: // click or dbclick left button on icon

case WM_LBUTTONDBLCLK: // should show desktop

DoShowDesktop();

break;

case WM_RBUTTONDOWN: // click right button, show menu

DisplayMenu();

break;

}

}


void CShowDesktopDlg::DisplayMenu()

{

CMenu menu;

menu.LoadMenu(IDR_MENU1);

CPoint point;

GetCursorPos(&point);


SetForegroundWindow();


menu.GetSubMenu(0)->TrackPopupMenu(

TPM_LEFTBUTTON|TPM_RIGHTBUTTON, 

point.x, point.y, this, NULL); 

PostMessage(WM_USER, 0, 0);

}


void CShowDesktopDlg::DoShowDesktop()

{

// find all windows in run, store visible ones in an array

CWnd *pWnd[MAXNUM_RUNWINDOW], *pWndCur;

int nWndNum = 0;

pWnd[nWndNum]= GetWindow(GW_HWNDFIRST);

while (pWnd[nWndNum] != NULL)

{

pWndCur = pWnd[nWndNum];

CString str;

pWndCur->GetWindowText(str);

if (pWndCur->IsWindowVisible() && 

! pWndCur->IsIconic() &&

! pWndCur->GetParent() &&

pWndCur != this &&

pWndCur != GetDesktopWindow() &&

! str.IsEmpty() &&

str != "Program Manager")

{

// add a window in list

nWndNum++;

// security!!

nWndNum = min(nWndNum, MAXNUM_RUNWINDOW-1);

}

pWnd[nWndNum] = pWndCur->GetWindow(GW_HWNDNEXT);

}


if (nWndNum)

{

// minimize of the windows in run

for (int i=0; i<nWndNum;++i)

{

pWnd[i]->ShowWindow(SW_SHOWMINNOACTIVE);

m_pWnd[i] = pWnd[i];

}

m_nWndNum = nWndNum;

}

else

{

// restore minimized windows in run

for (int i=m_nWndNum-1; i>=0; --i)

{

if (::IsWindow(m_pWnd[i]->m_hWnd) &&

m_pWnd[i]->IsIconic())

{

m_pWnd[i]->ShowWindow(SW_RESTORE);

m_pWnd[i]->UpdateWindow();

}}}}
void CShowDesktopDlg::OnExit() 

{

CDialog::EndDialog(0);

}


void CShowDesktopDlg::OnExitwindows() 

{

if (IDYES==MessageBox(_T("确实要关闭计算机 ?"), 

_T("显示桌面"), MB_YESNO|MB_ICONQUESTION))

ExitWindowsEx(EWX_SHUTDOWN, 0L);


}


void CShowDesktopDlg::OnReboot() 

{

if (IDYES == MessageBox(_T("确实要重新启动计算机 ?"), 

_T("显示桌面"), MB_YESNO|MB_ICONQUESTION))

ExitWindowsEx(EWX_REBOOT, 0L);

}
void CShowDesktopDlg::OnAbout() 

{

CAboutDlg about;

about.DoModal();

}