Sets our main struct and passes it to the parent class
Creates a new GtkIconSet. A GtkIconSet represents a single icon in various sizes and widget states. It can provide a GdkPixbuf for a given size and state on request, and automatically caches some of the rendered GdkPixbuf objects. Normally you would use gtk_widget_render_icon() instead of using GtkIconSet directly. The one case where you'd use GtkIconSet is to create application-specific icon sets to place in a GtkIconFactory.
Creates a new GtkIconSet with pixbuf as the default/fallback source image. If you don't add any additional GtkIconSource to the icon set, all variants of the icon will be created from pixbuf, using scaling, pixelation, etc. as required to adjust the icon size or make the icon look insensitive/prelighted.
Icon sets have a list of GtkIconSource, which they use as base icons for rendering icons in different states and sizes. Icons are scaled, made to look insensitive, etc. in gtk_icon_set_render_icon(), but GtkIconSet needs base images to work with. The base images and when to use them are described by a GtkIconSource. This function copies source, so you can reuse the same source immediately without affecting the icon set. An example of when you'd use this function: a web browser's "Back to Previous Page" icon might point in a different direction in Hebrew and in English; it might look different when insensitive; and it might change size depending on toolbar mode (small/large icons). So a single icon set would contain all those variants of the icon, and you might add a separate source for each one. You should nearly always add a "default" icon source with all fields wildcarded, which will be used as a fallback if no more specific source matches. GtkIconSet always prefers more specific icon sources to more generic icon sources. The order in which you add the sources to the icon set does not matter. gtk_icon_set_new_from_pixbuf() creates a new icon set with a default icon source based on the given pixbuf.
Copies icon_set by value.
Increments the reference count on icon_set.
Obtains a list of icon sizes this icon set can render. The returned array must be freed with g_free().
the main Gtk struct as a void*
Renders an icon using gtk_style_render_icon(). In most cases, gtk_widget_render_icon() is better, since it automatically provides most of the arguments from the current widget settings. This function never returns NULL; if the icon can't be rendered (perhaps because an image file fails to load), a default "missing image" icon will be returned instead.
Decrements the reference count on icon_set, and frees memory if the reference count reaches 0.
the main Gtk struct
Description Browse the available stock icons in the list of stock IDs found here. You can also use the gtk-demo application for this purpose. An icon factory manages a collection of GtkIconSet; a GtkIconSet manages a set of variants of a particular icon (i.e. a GtkIconSet contains variants for different sizes and widget states). Icons in an icon factory are named by a stock ID, which is a simple string identifying the icon. Each GtkStyle has a list of GtkIconFactory derived from the current theme; those icon factories are consulted first when searching for an icon. If the theme doesn't set a particular icon, GTK+ looks for the icon in a list of default icon factories, maintained by gtk_icon_factory_add_default() and gtk_icon_factory_remove_default(). Applications with icons should add a default icon factory with their icons, which will allow themes to override the icons for the application. To display an icon, always use gtk_style_lookup_icon_set() on the widget that will display the icon, or the convenience function gtk_widget_render_icon(). These functions take the theme into account when looking up the icon to use for a given stock ID. GtkIconFactory as GtkBuildable GtkIconFactory supports a custom <sources> element, which can contain multiple <source> elements. The following attributes are allowed: stock-id The stock id of the source, a string. This attribute is mandatory filename The filename of the source, a string. This attribute is optional icon-name The icon name for the source, a string. This attribute is optional. size Size of the icon, a GtkIconSize enum value. This attribute is optional. direction Direction of the source, a GtkTextDirection enum value. This attribute is optional. state State of the source, a GtkStateType enum value. This attribute is optional.