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 GUIDnid.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 preferednid.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 iconNOTIFYICONDATA 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 awaySetForegroundWindow(hwnd);// respect menu drop alignmentUINT 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;