Displaying Log Events

This tutorial describes how to display log events.

Steps

1. Create a CLogViewEvent or a CLogViewRecent class

2. Set a filter for the logs

       iLogViewEvent->SetFilterL(*iLogFilter,iStatus)

   A CLogViewRecent has additional functionality to identify and filter out duplicate events. A view is a purely virtual table and its add and delete functions have no effect on the log itself.

3. Create a view from the Log Engine using Event() A view is a list of events ordered chronologically, earliest first. A view always has a current event, which you retrieve with Event(). When you create a view the current event is the first event, and you navigate through the list using the other functions which take a TRequestStatus as argument.

   1. To get the first event in the view call

      if(CViewEvent.FirstL(aStatus))
        {
        User::WaitForRequest(aStatus); 
        CLogEvent e = iViewEvent.Event(); 
        }

   2. To get the last event in the view call

      if(CViewEvent.LastL(aStatus))
        {
        User::WaitForRequest(aStatus); 
        CLogEvent e = iViewEvent.Event(); 
        };

   3. To get the last event in the view call

      if(CViewEvent.FirstL(aStatus))
        {
        User::WaitForRequest(aStatus); 
        CLogEvent e = iViewEvent.Event(); 
        }

   4. and then inside a loop call

      while(CViewEvent.NextL(aStatus))
        {
        User::WaitForRequest(aStatus); 
        CLogEvent e = iViewEvent.Event(); 
        }

4. The view can be displayed to the user.