modifysysmenudlgdlg.cpp

如何定制对话框系统菜

/////////////////////////////////////////////////////////////////////////////
// Project：MODIFYSYSMENUDLG
// Author：NorthTibet
// Date：星期五, 五月 02, 2003
// Description：示范如何修改系统菜单以及如何利用系统托盘机制隐藏对话框。
//
/////////////////////////////////////////////////////////////////////////////
// ModifySysMenuDlgDlg.cpp : implementation file
//

#include "stdafx.h"
#include "ModifySysMenuDlg.h"
#include "ModifySysMenuDlgDlg.h"

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

#include "about.h"
/////////////////////////////////////////////////////////////////////////////
// CModifySysMenuDlgDlg dialog

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

BEGIN_MESSAGE_MAP(CModifySysMenuDlgDlg, CDialog)
	//{{AFX_MSG_MAP(CModifySysMenuDlgDlg)
	ON_WM_SYSCOMMAND()
	ON_BN_CLICKED(ID_APP_ABOUT,OnAbout)
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_WM_CLOSE()
	ON_COMMAND(IDC_EXIT, OnExit)
	ON_COMMAND(IDC_SHOW, OnShow)
	//}}AFX_MSG_MAP
	ON_MESSAGE(WM_USER_TRAY_NOTIFICATION,OnTrayNotification)
	ON_COMMAND(IDM_ABOUTBOX, OnAbout)

END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CModifySysMenuDlgDlg message handlers

BOOL CModifySysMenuDlgDlg::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);

	ASSERT((IDM_EXIT & 0xFFF0) == IDM_EXIT);
	ASSERT(IDM_EXIT < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu,strExitMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		strExitMenu.LoadString(IDS_EXIT);
		if (!strAboutMenu.IsEmpty() && !strExitMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_STRING,IDM_EXIT, strExitMenu);
			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
	//show tray icon
	m_trayIcon.Create(this, WM_USER_TRAY_NOTIFICATION, "Blhaaa 示范例子", 
	                  m_hIcon, IDM_TRAYICONMENU);

	if (start_minimized)
		PostMessage(WM_CLOSE);
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CModifySysMenuDlgDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	// 截获定制的系统菜单消息
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	} else if ((nID & 0xFFF0)==SC_CLOSE){
		OnClose();
	} else if ((nID & 0xFFF0)==IDM_EXIT) {
		::PostQuitMessage(0);
	}
	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 CModifySysMenuDlgDlg::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 CModifySysMenuDlgDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CModifySysMenuDlgDlg::OnAbout()
{
	CAboutDlg().DoModal();
}

void CModifySysMenuDlgDlg::OnClose() 
{
	// TODO: Add your message handler code here and/or call default
	// 改写原来系统菜单的“关闭”功能。
	ShowWindow(SW_HIDE);
}

void CModifySysMenuDlgDlg::OnExit() 
{
	// TODO: Add your command handler code here
	::PostQuitMessage(0);// 程序退出的唯一方式
}

void CModifySysMenuDlgDlg::OnShow() 
{
	// TODO: Add your command handler code here
	// 检查对话框窗口的可见状态
	if (!IsWindowVisible()) {
		ShowWindow(SW_SHOW);
	}
	else
		ShowWindow(SW_HIDE);
}

LONG CModifySysMenuDlgDlg::OnTrayNotification(WPARAM wparam, LPARAM lparam)
{   // The tray icon sent us a message.  Let's see what it is
    switch ( lparam )
    {
        case WM_CONTEXTMENU:
            TRACE( "WM_CONTEXTMENU\n" );
        case WM_RBUTTONDOWN:
            {// 用户在托盘图标上单击鼠标右键，弹出上下文菜单隐藏/显示对话框。
                CMenu oMenu;
                if (oMenu.LoadMenu(IDM_TRAYICONMENU))        
                {
                    CMenu* pPopup = oMenu.GetSubMenu(0);
                    ASSERT(pPopup != NULL);
                    CPoint oPoint;
					if (IsWindowVisible())// 根据对话框窗口的显示/隐藏状态修改菜单名称
						oMenu.ModifyMenu(IDC_SHOW,MF_STRING,IDC_SHOW,"隐藏(&H)");
					else
						oMenu.ModifyMenu(IDC_SHOW,MF_STRING,IDC_SHOW,"显示(&S)");
                    // 确定鼠标位置以便在该位置附近显示菜单
					GetCursorPos( &oPoint );
                    SetForegroundWindow();
                    pPopup->TrackPopupMenu(
                        TPM_LEFTALIGN | TPM_RIGHTBUTTON,
                        oPoint.x, oPoint.y, this); 
                }
            }
            break;
		// 单击/双击鼠标左键均显示出对话框
		case WM_LBUTTONDBLCLK:
		case WM_LBUTTONDOWN:
			OnShow();
			break;
    }
    return 0;
}

void CModifySysMenuDlgDlg::OnCancel() 
{
	// TODO: Add extra cleanup here
	OnClose();	
	
//	CDialog::OnCancel();
}

void CModifySysMenuDlgDlg::OnOK() 
{
	// TODO: Add extra validation here
	OnClose();	
//	CDialog::OnOK();
}