GTK+ Reference Manual
Part III. Theming in GTK+
Table of Contents
GtkStyleContext
— Rendering UI elements
GtkCssProvider
— CSS-like styling for widgets
GtkStyleProvider
— Interface to provide style information to GtkStyleContext
GtkStyleProperties
— Store for style property information
GtkThemingEngine
— Theming renderers
GtkWidgetPath
— Widget path abstraction
GtkSymbolicColor
— Symbolic colors
GtkGradient
— Gradients
GtkIconTheme
— Looking up icons by name
Themeable Stock Images
— Manipulating stock icons
Resource Files
— Routines for handling resource files
GtkStyle
— An object that hold style information for widgets