wxWidgets/interface/apptrait.h

/////////////////////////////////////////////////////////////////////////////
// Name:        apptrait.h
// Purpose:     documentation for wxAppTraits class
// Author:      wxWidgets team
// RCS-ID:      $Id$
// Licence:     wxWindows license
/////////////////////////////////////////////////////////////////////////////

/**
    @class wxAppTraits
    @wxheader{apptrait.h}

    The @b wxAppTraits class defines various configurable aspects of a wxApp.
    You can access it using wxApp::GetTraits function and you can
    create your own wxAppTraits overriding the
    wxApp::CreateTraits function.

    By default, wxWidgets creates a @c wxConsoleAppTraits object for console
    applications
    (i.e. those applications linked against wxBase library only - see the
    @ref overview_librarieslist "Libraries list" page) and a @c wxGUIAppTraits
    object for GUI
    applications.

    @library{wxbase}
    @category{FIXME}

    @seealso
    @ref overview_wxappoverview "wxApp overview", wxApp
*/
class wxAppTraits
{
public:
    /**
        Called by wxWidgets to create the default configuration object for the
        application. The default version creates a registry-based
        wxRegConfig class under MSW and
        wxFileConfig under all other platforms. The
        wxApp wxApp::GetAppName and
        wxApp::GetVendorName methods are used to determine the
        registry key or file name.
    */
    virtual wxConfigBase * CreateConfig();

    /**
        Creates the global font mapper object used for encodings/charset mapping.
    */
    virtual wxFontMapper * CreateFontMapper();

    /**
        Creates the default log target for the application.
    */
    virtual wxLog * CreateLogTarget();

    /**
        Creates the global object used for printing out messages.
    */
    virtual wxMessageOutput * CreateMessageOutput();

    /**
        Returns the renderer to use for drawing the generic controls (return value may
        be @NULL
        in which case the default renderer for the current platform is used);
        this is used in GUI mode only and always returns @NULL in console.
        
        NOTE: returned pointer will be deleted by the caller.
    */
    virtual wxRendererNative * CreateRenderer();

    /**
        This method returns the name of the desktop environment currently
        running in a Unix desktop. Currently only "KDE" or "GNOME" are
        supported and the code uses the X11 session protocol vendor name
        to figure out, which desktop environment is running. The method
        returns an empty string otherwise and on all other platforms.
    */
    virtual wxString GetDesktopEnvironment();

    /**
        Returns the wxStandardPaths object for the application.
        It's normally the same for wxBase and wxGUI except in the case of wxMac and
        wxCocoa.
    */
    virtual wxStandardPaths GetStandardPaths();

    /**
        Returns the wxWidgets port ID used by the running program and eventually
        fills the given pointers with the values of the major and minor digits
        of the native toolkit currently used.
        The version numbers returned are thus detected at run-time and not compile-time
        (except when this is not possible e.g. wxMotif).
        
        E.g. if your program is using wxGTK port this function will return wxPORT_GTK
        and
        put in given pointers the versions of the GTK library in use.
        
        See wxPlatformInfo for more details.
    */
    virtual wxPortId GetToolkitVersion(int * major = @NULL,
                                       int * minor = @NULL);

    /**
        Returns @true if @c fprintf(stderr) goes somewhere, @false otherwise.
    */
    virtual bool HasStderr();

    /**
        Returns @true if the library was built as wxUniversal. Always returns
        @false for wxBase-only apps.
    */
    bool IsUsingUniversalWidgets();

    /**
        Shows the assert dialog with the specified message in GUI mode or just prints
        the string to stderr in console mode.
        
        Returns @true to suppress subsequent asserts, @false to continue as before.
    */
    virtual bool ShowAssertDialog(const wxString & msg);
};