windows下的托盘编程(Shell_NotifyIcon)

添加和删除托盘图标

BOOL AddNotificationIcon(HWND hwnd){    NOTIFYICONDATA nid = {sizeof(nid)};    nid.hWnd = hwnd;    // add the icon, setting the icon, tooltip, and callback message.    // the icon will be identified with the GUID    nid.uFlags = NIF_ICON | NIF_TIP | NIF_MESSAGE | NIF_SHOWTIP | NIF_GUID;    nid.guidItem = __uuidof(PrinterIcon);    nid.uCallbackMessage = WMAPP_NOTIFYCALLBACK;    LoadIconMetric(g_hInst, MAKEINTRESOURCE(IDI_NOTIFICATIONICON), LIM_SMALL, &nid.hIcon);    LoadString(g_hInst, IDS_TOOLTIP, nid.szTip, ARRAYSIZE(nid.szTip));    Shell_NotifyIcon(NIM_ADD, &nid);    // NOTIFYICON_VERSION_4 is prefered    nid.uVersion = NOTIFYICON_VERSION_4;    return Shell_NotifyIcon(NIM_SETVERSION, &nid);}BOOL DeleteNotificationIcon(){    NOTIFYICONDATA nid = {sizeof(nid)};    nid.uFlags = NIF_GUID;    nid.guidItem = __uuidof(PrinterIcon);    return Shell_NotifyIcon(NIM_DELETE, &nid);}

WMAPP_NOTIFYCALLBACK为自定义的消息

UINT const WMAPP_NOTIFYCALLBACK = WM_APP + 1;

显示托盘提示信息

指定NOTIFYICONDATA的wInfoFlags,szInfoTitle,szInfo信息,再次调用Shell_NotifyIcon函数指定flag为NIM_MODIFY

BOOL ShowLowInkBalloon(){    // Display a low ink balloon message. This is a warning, so show the appropriate system icon.    NOTIFYICONDATA nid = {sizeof(nid)};    nid.uFlags = NIF_INFO | NIF_GUID;    nid.guidItem = __uuidof(PrinterIcon);    // respect quiet time since this balloon did not come from a direct user action.    nid.dwInfoFlags = NIIF_WARNING | NIIF_RESPECT_QUIET_TIME;    LoadString(g_hInst, IDS_LOWINK_TITLE, nid.szInfoTitle, ARRAYSIZE(nid.szInfoTitle));    LoadString(g_hInst, IDS_LOWINK_TEXT, nid.szInfo, ARRAYSIZE(nid.szInfo));    return Shell_NotifyIcon(NIM_MODIFY, &nid);}BOOL ShowNoInkBalloon(){    // Display an out of ink balloon message. This is a error, so show the appropriate system icon.    NOTIFYICONDATA nid = {sizeof(nid)};    nid.uFlags = NIF_INFO | NIF_GUID;    nid.guidItem = __uuidof(PrinterIcon);    nid.dwInfoFlags = NIIF_ERROR;    LoadString(g_hInst, IDS_NOINK_TITLE, nid.szInfoTitle, ARRAYSIZE(nid.szInfoTitle));    LoadString(g_hInst, IDS_NOINK_TEXT, nid.szInfo, ARRAYSIZE(nid.szInfo));    return Shell_NotifyIcon(NIM_MODIFY, &nid);}BOOL ShowPrintJobBalloon(){    // Display a balloon message for a print job with a custom icon    NOTIFYICONDATA nid = {sizeof(nid)};    nid.uFlags = NIF_INFO | NIF_GUID;    nid.guidItem = __uuidof(PrinterIcon);    nid.dwInfoFlags = NIIF_USER | NIIF_LARGE_ICON;    LoadString(g_hInst, IDS_PRINTJOB_TITLE, nid.szInfoTitle, ARRAYSIZE(nid.szInfoTitle));    LoadString(g_hInst, IDS_PRINTJOB_TEXT, nid.szInfo, ARRAYSIZE(nid.szInfo));    LoadIconMetric(g_hInst, MAKEINTRESOURCE(IDI_NOTIFICATIONICON), LIM_LARGE, &nid.hBalloonIcon);    return Shell_NotifyIcon(NIM_MODIFY, &nid);}

托盘右键弹出菜单

void ShowContextMenu(HWND hwnd, POINT pt){    HMENU hMenu = LoadMenu(g_hInst, MAKEINTRESOURCE(IDC_CONTEXTMENU));    if (hMenu)    {        HMENU hSubMenu = GetSubMenu(hMenu, 0);        if (hSubMenu)        {            // our window must be foreground before calling TrackPopupMenu or the menu will not disappear when the user clicks away            SetForegroundWindow(hwnd);            // respect menu drop alignment            UINT uFlags = TPM_RIGHTBUTTON;            if (GetSystemMetrics(SM_MENUDROPALIGNMENT) != 0)            {                uFlags |= TPM_RIGHTALIGN;            }            else            {                uFlags |= TPM_LEFTALIGN;            }            TrackPopupMenuEx(hSubMenu, uFlags, pt.x, pt.y, hwnd, NULL);        }        DestroyMenu(hMenu);    }}

NIN_BALLOONTIMEOUT为提示消失时触发,NIN_BALLOONUSERCLICK为提示出现点击托盘时触发,NIN_SELECT为单击托盘时触发

case WMAPP_NOTIFYCALLBACK:    switch (LOWORD(lParam))    {    case NIN_SELECT:        // for NOTIFYICON_VERSION_4 clients, NIN_SELECT is prerable to listening to mouse clicks and key presses        // directly.        if (IsWindowVisible(s_hwndFlyout))        {            HideFlyout(hwnd, s_hwndFlyout);            s_hwndFlyout = NULL;            s_fCanShowFlyout = FALSE;        }        else if (s_fCanShowFlyout)        {            s_hwndFlyout = ShowFlyout(hwnd);        }        break;    case NIN_BALLOONTIMEOUT:        RestoreTooltip();        break;    case NIN_BALLOONUSERCLICK:        RestoreTooltip();        // placeholder for the user clicking on the balloon.        MessageBox(hwnd, L"The user clicked on the balloon.", L"User click", MB_OK);        break;    case WM_CONTEXTMENU:        {            POINT const pt = { LOWORD(wParam), HIWORD(wParam) };            ShowContextMenu(hwnd, pt);        }        break;    }    break;