how to split log messages into file and screen in wxwidgets

To split log messages into a file and the screen using wxWidgets, you can utilize the wxLog and wxLogWindow classes. Here's an example of how you can achieve this:

1. Create a custom log file class:

cppCopy code
class MyLogFile : public wxLog

{

public:

    MyLogFile(const wxString& filename) : m_file(filename) {}



    void DoLogTextAtLevel(wxLogLevel level, const wxString& msg, time_t timestamp) override

    {

        // Log the message to the file

        m_file.Write(msg);



        // Pass the message to the default logger for display on screen

        wxLog::DoLogTextAtLevel(level, msg, timestamp);

    }



private:

    wxFile m_file;

};

1. Create a log window class:

cppCopy code
class MyLogWindow : public wxLogWindow

{

public:

    MyLogWindow(wxWindow* parent) : wxLogWindow(parent, "Log Window") {}

};

1. Initialize the log system in your application's OnInit() function:

cppCopy code
bool MyApp::OnInit()

{

    // Initialize wxWidgets

    wxApp::OnInit();



    // Create and attach the log file

    wxLog* logFile = new MyLogFile("log.txt");

    wxLog::SetActiveTarget(logFile);



    // Create and attach the log window

    wxFrame* frame = new wxFrame(nullptr, wxID_ANY, "Log Window", wxDefaultPosition, wxSize(800, 600));

    wxLogWindow* logWindow = new MyLogWindow(frame);

    logWindow->GetFrame()->Show();



    return true;

}

1. Use the log system to log messages:

cppCopy code
wxLogMessage("This is a log message.");

In the above example, log messages are split into two parts: written to a file (log.txt) through the custom log file class, and displayed on screen in a log window using the custom log window class.

By implementing a custom log file class derived from wxLog and overriding the DoLogTextAtLevel() function, you can control how the log messages are handled. In this case, the message is written to a file and then passed to the default logger for display on screen.

Additionally, the MyLogWindow class derived from wxLogWindow creates a window to display the log messages on screen.

Remember to include the necessary header files and instantiate the classes appropriately in your application.

Please note that this is a basic example, and you may need to adjust it according to your specific needs.