1、NIM_ADD: 添加一个图标到任务栏。NIM_MODIFY: 修改状态栏区域的图标。NIM_DELETE: 删除状态栏区域的图标。NIM_SETFOCUS: 将焦点返回到任务栏通知区域。当完成用户界面操作时,任务栏图标必须用此消息。例如,如果任务栏图标正显示上下文菜单,但用户按下ESCAPE键取消操作,这时就必须用此消息将焦点返回到任务栏通知区域。NIM_SETVERSION:指示任务栏按照相应的动态库版本工作。第二个参数pnid是NOTIFYICONDATA结构的地址,其内容视dwMessage的值而定。这个结构在SHELLAPI.H文件中定义如下:typedef struct _NOTI
2、FYICONDATA DWORD cbSize; / 结构大小(sizeof struct),必须设置 HWND hWnd; / 发送通知消息的窗口句柄 UINT uID; / 图标ID ( 由回调函数的WPARAM 指定) UINT uFlags;UINT uCallbackMessage; / 消息被发送到此窗口过程 HICON hIcon; / 任务栏图标句柄 CHAR szTip64; / 提示文本 NOTIFYICONDATA;该结构中uFlags的值分别为:#define NIF_MESSAGE 0x1 / 表示uCallbackMessage 有效 #define NIF_ICO
3、N 0x2 / 表示hIcon 有效 #define NIF_TIP 0x4 / 表示szTip 有效 在该结构的成员中,cbSize为该结构所占的字节数,hWnd为接受该图标所发出的消息的窗口的句柄(鼠标在任务栏上程序图标上动作时图标将发出消息,这个消息用户要自己定义),uID为被显示图标的ID,uFlags指明其余的几个成员(hIcon、uCallBackMessage和szTip)的值是否有效,uCallbackMessage为一个用户自定义的消息,当用户在该图标上作用一些鼠标动作时,图标将向应用程序的主框架窗口(hWnd成员中指定的窗口)发出该消息,为了使程序的主框架得到该通知消息,需
4、要设置NOTIFYICONDATA 结构的flag成员的值为NIF_MESSAGE。hIcon为将在任务栏上显示的图标句柄,szTip鼠标停留在该图标上时显示的提示字符串。尽管Shell_NotifyIcon函数简单实用,但它毕竟是个Win32 API,为此本实例将它封装在了一个C+类中,这个类叫做CTrayIcon,有了它,托盘编程会更加轻松自如,因为它隐藏了NOTIFYICONDATA、消息代码、标志以及一些繁琐的细节。二、编程步骤 1、 启动Visual C+6.0,生成一个单文档的应用程序TrayTest,取消文档视图支持;2、 在CMainFrame类中添加自定义消息#define
5、WM_MY_TRAY_NOTIFICATION WM_USER+0,并在该类中为此自定义消息手动添加消息映射ON_MESSAGE(WM_MY_TRAY_NOTIFICATION, OnTrayNotification)和消息响应函数afx_msg LRESULT OnTrayNotification(WPARAM wp, LPARAM lp);3、 设计二个图标添加到项目中,其ID标志分别为IDI_MYICON、IDI_MYICON2,作为托盘显示时的图标;4、 在CMainFrame类中添加下述变量: CTrayIcon m_trayIcon(用来操作图标的类对象)、CEdit m_wndE
6、dit(编辑框用来显示所跟踪到的鼠标消息)、int m_iWhichIcon(决定当前托盘使用哪个图标)、BOOL m_bShutdown(是否关闭当前拖盘程序标志)、BOOL m_bShowTrayNotifications(是否显示托盘消息标志);5、 为程序的IDR_MAINFRAME添加处理菜单项和托盘的上下文菜单IDI_TRAYICON(具体的菜单项的标题和ID标志符参见代码部分),然后使用Class Wizard为各个菜单项添加处理函数;6、 添加代码,编译运行程序。/CTrayIcon类的头文件;#ifndef _TRAYICON_H #define _TRAYICON_H cl
7、ass CTrayIcon : public CCmdTarget protected:DECLARE_DYNAMIC(CTrayIcon) NOTIFYICONDATA m_nid; / struct for Shell_NotifyIcon args public:CTrayIcon(UINT uID);CTrayIcon();/ Call this to receive tray notifications void SetNotificationWnd(CWnd* pNotifyWnd, UINT uCbMsg);BOOL SetIcon(UINT uID); / main varia
8、nt you want to use BOOL SetIcon(HICON hicon, LPCSTR lpTip);BOOL SetIcon(LPCTSTR lpResName, LPCSTR lpTip) return SetIcon(lpResName ?AfxGetApp()-LoadIcon(lpResName) : NULL, lpTip); BOOL SetStandardIcon(LPCTSTR lpszIconName, LPCSTR lpTip) return SetIcon(:LoadIcon(NULL, lpszIconName), lpTip);virtual LRE
9、SULT OnTrayNotification(WPARAM uID, LPARAM lEvent);#endif /CTrayIcon类的.CPP文件 #include stdafx.htrayicon.h#include / for AfxLoadString IMPLEMENT_DYNAMIC(CTrayIcon, CCmdTarget) CTrayIcon:CTrayIcon(UINT uID) memset(&m_nid, 0 , sizeof(m_nid); / Initialize NOTIFYICONDATA m_nid.cbSize = sizeof(m_nid);m_nid
10、.uID = uID; / never changes after construction AfxLoadString(uID, m_nid.szTip, sizeof(m_nid.szTip);/ Use resource string as tip if there is one CTrayIcon() SetIcon(0); / remove icon from system tray void CTrayIcon:SetNotificationWnd(CWnd* pNotifyWnd, UINT uCbMsg) / Set notification window. It must c
11、reated already. ASSERT(pNotifyWnd=NULL :IsWindow(pNotifyWnd-GetSafeHwnd();m_nid.hWnd = pNotifyWnd-GetSafeHwnd();ASSERT(uCbMsg=0 uCbMsg=WM_USER);m_nid.uCallbackMessage = uCbMsg;BOOL CTrayIcon:SetIcon(UINT uID) / Sets both the icon and tooltip from resource ID ,To remove the icon, call SetIcon(0) HICO
12、N hicon=NULL;if (uID) AfxLoadString(uID, m_nid.szTip, sizeof(m_nid.szTip);hicon = AfxGetApp()-LoadIcon(uID); return SetIcon(hicon, NULL);SetIcon(HICON hicon, LPCSTR lpTip) / Common SetIcon for all overloads. UINT msg;m_nid.uFlags = 0;if (hicon) / Set the icon msg = m_nid.hIcon ? NIM_MODIFY : NIM_ADD
13、;m_nid.hIcon = hicon; / Add or replace icon in system tray m_nid.uFlags = NIF_ICON; else if (m_nid.hIcon=NULL) / remove icon from tray return TRUE; / already deleted msg = NIM_DELETE;if (lpTip) / Use the tip, if any strncpy(m_nid.szTip, lpTip, sizeof(m_nid.szTip);if (m_nid.szTip0) m_nid.uFlags = NIF
14、_TIP;if (m_nid.uCallbackMessage & m_nid.hWnd) / Use callback if any m_nid.uFlags = NIF_MESSAGE;BOOL bRet = Shell_NotifyIcon(msg, &m_nid); / Do it if (msg=NIM_DELETE !bRet) m_nid.hIcon = NULL; / failed return bRet;LRESULT CTrayIcon:OnTrayNotification(WPARAM wID, LPARAM lEvent) if (wID!=m_nid.uID (lEv
15、ent!=WM_RBUTTONUP & lEvent!=WM_LBUTTONDBLCLK) return 0;CMenu menu;/装载上下文菜单;if (!menu.LoadMenu(m_nid.uID) CMenu* pSubMenu = menu.GetSubMenu(0);pSubMenu) if (lEvent=WM_RBUTTONUP) /设置第一个菜单项为默认菜单项目 :SetMenuDefaultItem(pSubMenu-m_hMenu, 0, TRUE);/将当前菜单作为上下文菜单;CPoint mouse;GetCursorPos(&mouse);SetForegrou
16、ndWindow(m_nid.hWnd);TrackPopupMenu(pSubMenu-m_hMenu, 0, mouse.x, mouse.y, 0,m_nid.hWnd, NULL); else / double click: execute first menu item SendMessage(m_nid.hWnd, WM_COMMAND, pSubMenu-GetMenuItemID(0), 0);return 1;/ MainFrm.h : interface of the CMainFrame class #if !defined(AFX_MAINFRM_H_9ED70A69_
17、C975_4F20_9D4E_B2877E3575D0_INCLUDED_) #define AFX_MAINFRM_H_9ED70A69_C975_4F20_9D4E_B2877E3575D0_INCLUDED_ #if _MSC_VER 1000 #pragma once #endif / _MSC_VER class CMainFrame : public CFrameWnd CMainFrame();DECLARE_DYNAMIC(CMainFrame) / Attributes / Overrides / ClassWizard generated virtual function
18、overrides /AFX_VIRTUAL(CMainFrame) /AFX_VIRTUAL / Implementation virtual CMainFrame();#ifdef _DEBUG virtual void AssertValid() const;virtual void Dump(CDumpContext& dc) const;#endif / control bar embedded members CStatusBar m_wndStatusBar;CTrayIcon m_trayIcon; / my tray icon CEdit m_wndEdit; / to di
19、splay tray notifications int m_iWhichIcon; / which HICON to use BOOL m_bShutdown; / OK to terminate TRAYTEST BOOL m_bShowTrayNotifications; / display info in main window / Generated message map functions /AFX_MSG(CMainFrame) afx_msg LRESULT OnTrayNotification(WPARAM wp, LPARAM lp);afx_msg int OnCrea
20、te(LPCREATESTRUCT lpCreateStruct);afx_msg void OnToggleIcon();afx_msg void OnViewClear();afx_msg void OnViewNotifications();afx_msg void OnUpdateViewClear(CCmdUI* pCmdUI);afx_msg void OnUpdateViewNotifications(CCmdUI* pCmdUI);afx_msg void OnClose();afx_msg void OnAppOpen();afx_msg void OnAppSuspend(
21、);/ NOTE - the ClassWizard will add and remove member functions here. / DO NOT EDIT what you see in these blocks of generated code!/AFX_MSG DECLARE_MESSAGE_MAP() /CMainFrm.cpp TrayTest.hMainFrm.h#ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE = _FILE_;#endif / control bar embedded mem
copyright@ 2008-2022 冰豆网网站版权所有
经营许可证编号:鄂ICP备2022015515号-1