GtkIconTheme {RGtk2}R Documentation

GtkIconTheme

Description

Looking up icons by name

Methods and Functions

gtkIconThemeNew()
gtkIconThemeGetDefault()
gtkIconThemeGetForScreen(screen)
gtkIconThemeSetScreen(object, screen)
gtkIconThemeSetCustomTheme(object, theme.name)
gtkIconThemeHasIcon(object, icon.name)
gtkIconThemeLookupIcon(object, icon.name, size, flags)
gtkIconThemeChooseIcon(object, icon.names, size, flags)
gtkIconThemeLookupByGicon(object, icon, size, flags)
gtkIconThemeLoadIcon(object, icon.name, size, flags, .errwarn = TRUE)
gtkIconThemeListContexts(object)
gtkIconThemeListIcons(object, context = NULL)
gtkIconThemeGetIconSizes(object, icon.name)
gtkIconThemeGetExampleIconName(object)
gtkIconThemeRescanIfNeeded(object)
gtkIconThemeAddBuiltinIcon(icon.name, size, pixbuf)
gtkIconInfoCopy(object)
gtkIconInfoNewForPixbuf(icon.theme, pixbuf)
gtkIconInfoGetBaseSize(object)
gtkIconInfoGetBuiltinPixbuf(object)
gtkIconInfoLoadIcon(object, .errwarn = TRUE)
gtkIconInfoSetRawCoordinates(object, raw.coordinates)
gtkIconInfoGetEmbeddedRect(object)
gtkIconInfoGetAttachPoints(object)
gtkIconInfoGetDisplayName(object)
gtkIconTheme()

Hierarchy

GObject
   +----GtkIconTheme

Detailed Description

GtkIconTheme provides a facility for looking up icons by name and size. The main reason for using a name rather than simply providing a filename is to allow different icons to be used depending on what icon theme is selected by the user. The operation of icon themes on Linux and Unix follows the Icon Theme Specification (http://www.freedesktop.org/Standards/icon-theme-spec). There is a default icon theme, named hicolor where applications should install their icons, but more additional application themes can be installed as operating system vendors and users choose.

Named icons are similar to the facility, and the distinction between the two may be a bit confusing. A few things to keep in mind:

A good rule of thumb is that if there is a stock image for what you want to use, use it, otherwise use a named icon. It turns out that internally stock images are generally defined in terms of one or more named icons. (An example of the more than one case is icons that depend on writing direction; GTK_STOCK_GO_FORWARD uses the two themed icons "gtk-stock-go-forward-ltr" and "gtk-stock-go-forward-rtl".)

In many cases, named themes are used indirectly, via GtkImage or stock items, rather than directly, but looking up icons directly is also simple. The GtkIconTheme object acts as a database of all the icons in the current theme. You can create new GtkIconTheme objects, but its much more efficient to use the standard icon theme for the GdkScreen so that the icon information is shared with other people looking up icons. In the case where the default screen is being used, looking up an icon can be as simple as:

icon_theme <- gtkIconThemeGetDefault()
result <- icon_theme$loadIcon("my-icon-name", 48, 0)
if (!result[[1]]) {
  warning("Couldn't load icon: ", result$error$message)
} else {
  pixbuf <- result[[1]]
  ## Use the pixbuf
}

Structures

Convenient Construction

gtkIconTheme is the equivalent of gtkIconThemeNew.

Enums and Flags

Signals

changed(icon.theme, user.data)

Emitted when the current icon theme is switched or GTK+ detects that a change has occurred in the contents of the current icon theme.

icon.theme

the icon theme

user.data

user data set when the signal handler was connected.

Author(s)

Derived by RGtkGen from GTK+ documentation

References

http://library.gnome.org/devel//gtk/GtkIconTheme.html


[Package RGtk2 version 2.20.21 Index]