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;