that the standard behaviour is to not show informational messages if there are
any errors later - the logic being that the later error messages make the
informational messages preceding them meaningless.
that the standard behaviour is to not show informational messages if there are
any errors later - the logic being that the later error messages make the
informational messages preceding them meaningless.
might be activated if the user wishes to know more details about the program
progress (another, but possibly confusing name for the same function is {\bf
wxLogInfo}).
might be activated if the user wishes to know more details about the program
progress (another, but possibly confusing name for the same function is {\bf
wxLogInfo}).
handy for logging errors after system call (API function) failure. It logs the
specified message text as well as the last system error
code ({\it errno} or {\it ::GetLastError()} depending on the platform) and the corresponding error
handy for logging errors after system call (API function) failure. It logs the
specified message text as well as the last system error
code ({\it errno} or {\it ::GetLastError()} depending on the platform) and the corresponding error
first argument.
\item{\bf wxLogDebug} is {\bf the} right function for debug output. It only
does anything at all in the debug mode (when the preprocessor symbol
first argument.
\item{\bf wxLogDebug} is {\bf the} right function for debug output. It only
does anything at all in the debug mode (when the preprocessor symbol
cout/cerr C++ streams for writing out some (debug or otherwise) information.
Although it works just fine under Unix, these messages go strictly nowhere
under Windows where the stdout of GUI programs is not assigned to anything.
cout/cerr C++ streams for writing out some (debug or otherwise) information.
Although it works just fine under Unix, these messages go strictly nowhere
under Windows where the stdout of GUI programs is not assigned to anything.
Moreover {\it wxMSW} doesn't have a {\bf console} as you may have with {\it
wxGTK}. Under {\it wxMSW}, a call using {\it cout} just goes nowhere. To
cope with this problem, {\it wxWindows} provides a way to redirect {\it cout}
Moreover {\it wxMSW} doesn't have a {\bf console} as you may have with {\it
wxGTK}. Under {\it wxMSW}, a call using {\it cout} just goes nowhere. To
cope with this problem, {\it wxWindows} provides a way to redirect {\it cout}
from \helpref{wxLog}{wxlog}. As such, it implements the virtual functions of
the base class which are called when a message is logged. Only one log target
is {\it active} at any moment, this is the one used by {\it wxLogXXX()}
from \helpref{wxLog}{wxlog}. As such, it implements the virtual functions of
the base class which are called when a message is logged. Only one log target
is {\it active} at any moment, this is the one used by {\it wxLogXXX()}
\item{\bf wxLogStream} This class has the same functionality as wxLogStderr,
but uses {\it ostream} and cerr instead of {\it FILE *} and stderr.
\item{\bf wxLogGui} This is the standard log target for wxWindows
\item{\bf wxLogStream} This class has the same functionality as wxLogStderr,
but uses {\it ostream} and cerr instead of {\it FILE *} and stderr.
\item{\bf wxLogGui} This is the standard log target for wxWindows
most reasonable handling of all types of messages for given platform.
\item{\bf wxLogWindow} This log target provides a "log console" which
collects all messages generated by the application and also passes them to the
most reasonable handling of all types of messages for given platform.
\item{\bf wxLogWindow} This log target provides a "log console" which
collects all messages generated by the application and also passes them to the
anything. The objects of this class may be instantiated to (temporarily)
suppress output of {\it wxLogXXX()} functions. As an example, trying to open a
non-existing file will usually provoke an error message, but if for some
anything. The objects of this class may be instantiated to (temporarily)
suppress output of {\it wxLogXXX()} functions. As an example, trying to open a
non-existing file will usually provoke an error message, but if for some