## wxAppTraits

The 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 `wxConsoleAppTraits` object for console applications (i.e. those applications linked against wxBase library only - see the Libraries list page) and a `wxGUIAppTraits` object for GUI applications.

Derived from

None

Include files

<wx/apptrait.h>

See also

wxApp overview, wxApp

Members

wxAppTraits::CreateFontMapper
wxAppTraits::CreateLogTarget
wxAppTraits::CreateMessageOutput
wxAppTraits::CreateRenderer
wxAppTraits::GetDesktopEnvironment
wxAppTraits::GetStandardPaths
wxAppTraits::GetToolkitVersion
wxAppTraits::HasStderr
wxAppTraits::IsUsingUniversalWidgets
wxAppTraits::ShowAssertDialog

### wxAppTraits::CreateFontMapper

virtual wxFontMapper * CreateFontMapper()

Creates the global font mapper object used for encodings/charset mapping.

### wxAppTraits::CreateLogTarget

virtual wxLog * CreateLogTarget()

Creates the default log target for the application.

### wxAppTraits::CreateMessageOutput

virtual wxMessageOutput * CreateMessageOutput()

Creates the global object used for printing out messages.

### wxAppTraits::CreateRenderer

virtual wxRendererNative * CreateRenderer()

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.

### wxAppTraits::GetDesktopEnvironment

virtual wxString GetDesktopEnvironment() const

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.

### wxAppTraits::GetStandardPaths

virtual wxStandardPaths & GetStandardPaths()

Returns the wxStandardPaths object for the application. It's normally the same for wxBase and wxGUI except in the case of wxMac and wxCocoa.

### wxAppTraits::GetToolkitVersion

virtual wxPortId GetToolkitVersion(int *major = NULL, int *minor = NULL)

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.

### wxAppTraits::HasStderr

virtual bool HasStderr()

Returns `true` if `fprintf(stderr)` goes somewhere, `false` otherwise.

### wxAppTraits::IsUsingUniversalWidgets

bool IsUsingUniversalWidgets() const

Returns `true` if the library was built as wxUniversal. Always returns `false` for wxBase-only apps.

### wxAppTraits::ShowAssertDialog

virtual bool ShowAssertDialog(const wxString & msg)

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.