A GUI toolkit is a separate package that implements the gWidgets API. This function allows one to select the toolkit to be used by default.
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The name matches the package name without the initial gWidgets. For instance, "RGtk2" refers to the implementation provided by gWidgetsRGtk2.
Toolkits are named gWidgetsXXX. This function is used to get the toolkit class, or have the user select one. The
gtoolkit function returns a string form of the toolkit. One way to set a toolkit is to use the
guiToolkit option, as in
guiToolkit function returns a subclass of guiWidgetsToolkit that is
used for dispatching purposes by gWidgets. For example, the
method svalue dispatches on its first argument and the value
of the toolkit class stored in the toolkit slot of the object.
gtoolkit function returns a character string for the toolkit.
Loading required package: gWidgetsRGtk2 Loading required package: RGtk2 R session is headless; GTK+ not initialized. Loading required package: cairoDevice (R:22167): Gtk-WARNING **: gtk_disable_setlocale() must be called before gtk_init() Error: package or namespace load failed for 'cairoDevice': .onLoad failed in loadNamespace() for 'cairoDevice', details: call: fun(libname, pkgname) error: GDK display not found - please make sure X11 is running Failed with error: 'package 'cairoDevice' could not be loaded' An object of class "guiWidgetsToolkitRGtk2" Slot "toolkit":  "RGtk2"
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