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Tracing Trolltech-Qt Classes

Purpose

If you are building an application that uses the Qt library, LobTraceStream provides an additional class LobTraceStreamQt which eases the tracing of the most common Qt classes.

LobTraceStreamQt overrides LobTraceStream.

To enable Qt tracing,

• Add #include <lobtracestreamqt.h> in all the .cpp files that need traces
  ( instead of #include <lobtracestream.h> )
• Add the following line to your qt project file (*.pro) :
  DEFINES += LOBTRACE_QT
• Use the LOB_TRACE macro as before.

Example

  QStringList mySList;
  [...]
  LOB_TRACE(EX5DLG, DEBUG) << "mySList = " << mySList << lt_endl;

will generate the following output:

  1-dec-2002 23:35:41   TRACE   EX5DLG: "mySList = {{string_1}{string_2}{string_3}}" [example5Dlg.cpp:76]

or in XML format:

  <LobTrace module="EX5DLG" level="TRACE" date=" 1-dec-2002 23:34:39" line="76" file="example5Dlg.cpp">
      <text>QStringList m_stringlist = </text>
      <QStringList count="3">
          <string>string_1</string>
          <string>string_2</string>
          <string>string_3</string>
      </QStringList>
  </LobTrace>

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