Here are the classes, structs, unions and interfaces with brief descriptions:

[detail level 123]

__gnu_cxx
Gdk
Cairo
AppLaunchContext	This is an implementation of Gio::AppLaunchContext that handles launching an application in a graphical context
Cursor	This represents a cursor
Device	A Gdk::Device instance contains a detailed description of an extended input device
DeviceManager	Functions for handling input devices
Display	Gdk::Display object's purpose is two fold: To grab/ungrab keyboard focus and mouse pointer To manage and provide information about the Gdk::Screen(s) available for this Gdk::Display
DisplayManager	The purpose of the GdkDisplayManager singleton object is to offer notification when displays appear or disappear or the default display changes
DragContext	A Gdk::DragContext holds information about a drag in progress
Event
PixbufError	Exception class for Gdk::Pixbuf errors
Pixbuf
PixbufAnimation	The gdk-pixbuf library provides a simple mechanism to load and represent animations
PixbufAnimationIter	An iterator which points to a certain position in a PixbufAnimation
PixbufFormat
PixbufLoader
Rectangle	Gdk::Rectangle is a structure holding the position and size of a rectangle
RGBA	An RGBA Color
Screen	Object representing a physical screen Gdk::Screen objects are the GDK representation of a physical screen
TimeCoord	A Gdk::TimeCoord instance contains a single event of motion history
Point	This is a simple structure containing an x and y coordinate of a point
Visual	A Gdk::Visual describes a particular video hardware display format
Window	A Gdk::Window is a rectangular region on the screen
Color	Gdk::Color is used to describe an allocated or unallocated color
Gio
DBus
Glib
Value< Glib::RefPtr< Gtk::RecentInfo > >
Gtk	Copyright (C) 2012 The gtkmm Development Team
AccelMap
Menu_Helpers
Stock
AboutDialog	The AboutDialog offers a simple way to display information about a program like its logo, name, copyright, website and license
AccelGroup	A Gtk::AccelGroup represents a group of keyboard accelerators, typically attached to a toplevel Gtk::Window (with Gtk::Window::add_accel_group())
AccelLabel	A label which displays an accelerator key on the right of the text
Action	An action which can be triggered by a menu or toolbar item
Actionable	This interface provides a convenient way of associating widgets with actions on a ApplicationWindow or Application
ActionBar	A full width bar for presenting contextual actions
ActionGroup
Activatable	Activatable widgets can be connected to a Gtk::Action and reflect the state of the action
Adjustment	A class representing an adjustable bounded value
Alignment	A widget which controls the alignment and size of its child
AppChooser	Interface implemented by widgets for choosing an application
AppChooserButton	A button to launch an application chooser dialog
AppChooserDialog	An application chooser dialog
AppChooserWidget	An application chooser widget that can be embedded in other widgets
Application	The Gtk::Application class handles many important aspects of a GTK+ application in a convenient fashion, without enforcing a one-size-fits-all application model
ApplicationWindow	A Gtk::Window subclass with Gtk::Application support
Arrow	Produces an arrow pointing in one of the four cardinal directions
AspectFrame	A frame that constrains its child to a particular aspect ratio
Assistant	A widget used to guide users through multi-step operations
Bin	A container with just one child
Border	This specifies a border around a rectangular area that can be of a different width on each side
Box	Organizes child widgets into a rectangular area
Buildable	A base class for objects that can be built by Gtk::Builder
BuilderError	Exception class for Gdk::Builder errors
Builder	Build an interface from a UI definition description
Button	A widget that creates a signal when clicked on
ButtonBox	A container for arranging buttons
Calendar	Display a calendar and/or allow the user to select a date
CellArea	An abstract base class for laying out CellRenderers
CellAreaBox	A cell area that renders CellRenderers into a row or a colum, depending on its orientation
CellAreaContext	This stores geometrical information for a series of rows in a CellArea
CellEditable	Interface for widgets which are used for editing cells
CellLayout	An interface for packing cells
CellRenderer	CellRenderers are used by Gtk::TreeView columns to render the Gtk::TreeModel column data appropriately
CellRendererAccel	Renders a keyboard accelerator in a cell
CellRendererCombo	Renders a combobox in a cell
CellRendererPixbuf	Renders a pixbuf in a cell
CellRendererProgress	Renders numbers as progress bars
CellRendererSpin	Renders a spin button in a cell
CellRendererSpinner	Renders a spinning animation in a cell
CellRendererText	Renders text in a cell
CellRendererToggle	Renders a toggle button in a cell
CellView	A widget displaying a single row of a TreeModel
CheckButton	Create widgets with a discrete toggle button
CheckMenuItem	A menu item that maintains the state of a boolean value in addition to a Gtk::MenuItem's usual role in activating application code
Clipboard	The Clipboard object represents a clipboard of data shared between different processes or between different widgets in the same process
ColorButton	A button to launch a color selection dialog
ColorChooser	This interface can be implemented by widgets which allow the user to choose a color
ColorChooserDialog	This dialog is for choosing a color
ComboBox	A widget used to choose from a list of items
ComboBoxText	This is a simple variant of ComboBox that hides the model-view complexity for simple text-only use cases
Container	Abstract container class
CssProvider	CSS-like styling for widgets, implementing the StyleProvider base class
Dialog	Create popup windows
DrawingArea	A widget for custom user interface elements
Editable	Base class for text-editing widgets
Entry	A single line text entry field
EntryCompletion	Completion functionality for Gtk::Entry
EntryBuffer	A Text buffer for the Entry widget
IconSize	Represents registered icon sizes
EventBox	Event capturing box
Expander	A container which can hide its child
FileChooserError	Exception class for Gdk::FileChooser errors
FileChooser	Gtk::FileChooser is an interface that can be implemented by file selection widgets
FileChooserButton	A button to launch a file chooser dialog
FileChooserDialog	Convenient file chooser window
FileChooserWidget	File chooser widget that can be embedded in other widgets
FileFilter	A filter for selecting a file subset
Info
Fixed	A container which allows you to position widgets at fixed coordinates
FlowBox	A container that allows reflowing its children
FlowBoxChild	See the description of FlowBox
FontButton	A button to launch a font selection dialog
FontChooser	An interface implemented by widgets displaying fonts
FontChooserDialog	A dialog box for selecting fonts
FontChooserWidget	A dialog box for selecting fonts
Frame	A Gtk::Bin with a decorative frame and optional label
Grid	A container which arranges its child widgets in rows and columns
HeaderBar	A box with a centered child
VBox	Vertical Box for laying widgets in a vertical row
HBox	Horizontal Box for laying widgets in a horizontal row
IconInfo
IconThemeError	Exception class for Gdk::IconTheme errors
IconTheme
IconView	The IconView provides an alternative view of a list model
Image	A widget displaying an image
InfoBar	This widget that can be used to show messages to the user without showing a dialog
Invisible	This widget is used internally in GTK+, and is probably not useful for application developers
Label	A widget that displays a small to medium amount of text
Layout	Infinite scrollable area containing child widgets and/or custom drawing
LevelBar	A bar that can used as a level indicator
LinkButton	Create buttons bound to a URL
ListBox	A ListBox is a vertical container that contains ListBoxRow children
ListBoxRow	See the description of ListBox
ListStore	Thist is a list model for use with a Gtk::TreeView widget
Main	Main application class
Menu	A drop-down menu consisting of Gtk::MenuItem objects which can be navigated and activated by the user to perform application functions
MenuBar	A standard menu bar which usually holds Gtk::Menu submenu items
MenuButton	A widget that shows a menu when clicked on
MenuItem	Child item for menus
MenuShell	The abstract base class for Gtk::Menu and Gtk::MenuBar
MenuToolButton	A Gtk::ToolItem containing a toggle button
MessageDialog	Convenient message window
Misc	A base class for widgets with alignments and padding
Notebook	Container which shows one of its children at a time, in tabbed windows
NumerableIcon	A Gio::Icon that allows numbered emblems
OffscreenWindow	A top-level container widget used to manage offscreen rendering of child widgets
Orientable	This interface is implemented by all widgets that can be oriented horizontally or vertically
PageSetup	A PageSetup object stores the page size, orientation and margins
Paned	A widget with two adjustable panes
PaperSize	PaperSize handles paper sizes
PlacesSidebar	Sidebar that displays frequently-used places in the file system
Popover	Context dependent bubbles
PrintContext	A PrintContext encapsulates context information that is required when drawing pages for printing, such as the cairo context and important parameters like page size and resolution
PrintError
PrintOperation	PrintOperation is the high-level, portable printing API
PrintOperationPreview
PrintSettings	A PrintSettings object represents the settings of a print dialog in a system-independent way
Keys	Print settings keys
PageRange
ProgressBar	A widget which indicates progress visually
RadioAction	An action of which only one in a group can be active
RadioButton	A single radio button performs the same basic function as a Gtk::CheckButton, as its position in the object hierarchy reflects
RadioMenuItem	A CheckMenuItem that belongs to a group
RadioToolButton	A toolbar item that contains a radio button
Range	Base class for widgets which visualize an adjustment
RecentAction	An action of which represents a list of recently used files
RecentChooserError	Exception class for Gtk::RecentChooser errors
RecentChooser	RecentChooser is an interface that can be implemented by widgets displaying the list of recently used files
RecentChooserDialog	RecentChooserDialog is a dialog box suitable for displaying the recently used documents
RecentChooserMenu	RecentChooserMenu is a widget suitable for displaying recently used files inside a menu
RecentChooserWidget	RecentChooserWidget is a widget suitable for selecting recently used files
RecentFilter	RecentFilter can be used to restrict the files being shown in a RecentChooser
Info	A RecentFilter::Info class is used to pass information about the tested file to filter()
RecentInfo	Contains information found when looking up an entry of the recently used files list
RecentManagerError	Exception class for Gtk::RecentManager errors
RecentManager	RecentManager provides a facility for adding, removing and looking up recently used files
Data	Meta-data passed to add_item()
Revealer	Hide and show with animation
Scale	A slider widget for selecting a value from a range
ScaleButton	A button which pops up a scale widget
Scrollable	This interface is implemented by widgets with native scrolling ability
Scrollbar	A Scrollbar
ScrolledWindow	Adds scrollbars to its child widget
SearchBar	A toolbar to integrate a search entry with
SearchEntry	This is a subclass of Gtk::Entry that has been tailored for use as a search entry
SelectionData
Separator	A separator widget
SeparatorMenuItem	A separator used to group items within a menu
SeparatorToolItem	A toolbar item that separates groups of other toolbar items
Settings	Sharing settings between applications
SizeGroup	Gtk::SizeGroup provides a mechanism for grouping a number of widgets together so they all request the same amount of space
SpinButton	Numeric Entry with up/down buttons Slightly misnamed, this should be called a SpinEntry
Spinner	A widget that displays a spinner animation
Stack	A container that shows only one child at a time
StackSwitcher	A controller for a Gtk::Stack
Statusbar	Text status indicator This widget is used to display status information
StatusIcon	The "system tray" or notification area is normally used for transient icons that indicate some special state
StyleContext	This object stores styling information affecting a widget defined by WidgetPath
StyleProvider	This is a base class used to provide style information to a StyleContext
Switch	A "light switch"-style toggle
TargetList
TextAttributes
TextBuffer	Multi-line attributed text that can be displayed by one or more Gtk::TextView widgets
TextChildAnchor	A TextChildAnchor is a spot in the buffer where child widgets can be "anchored" (inserted inline, as if they were characters)
TextIter	Typefed as Gtk::TextBuffer::iterator
TextMark	Typedefed as Gtk::TextBuffer::Mark
TextTag	Typedefed as Gtk::TextBuffer::Tag
TextTagTable	Typedefed as Gtk::TextBuffer::TagTable
TextView	Multi-line text editing widget
ToggleAction	An action which can be toggled between two states
ToggleButton	A Gtk::ToggleButton will remain 'pressed-in' when clicked
ToggleToolButton	A Gtk::ToolItem containing a toggle button
Toolbar	Bars of buttons and other widgets
ToolButton	A Gtk::ToolItem subclass that displays buttons
ToolItem	The base class of widgets that can be added to ToolShell
ToolItemGroup	A ToolItemGroup is used together with ToolPalette to add ToolItems to a palette-like container with different categories and drag and drop support
ToolPalette	A ToolPalette allows you to add ToolItems to a palette-like container with various categories and drag and drop support
ToolShell	A base class for containers containing ToolItem widgets
Tooltip	Add tips to your widgets
TreeDragDest
TreeDragSource
TreeIterBase
TreeIter	A Gtk::TreeModel::iterator is a reference to a specific node on a specific model
TreeValueProxy
TreeRow	Typedefed as TreeModel::Row
TreeNodeChildren	Typedefed as TreeModel::Children
TreeModel	This class defines a generic tree interface for use by the Gtk::TreeView widget
TreeModelFilter
TreeModelSort	A wrapper which makes an underlying Gtk::TreeModel sortable
TreePath	A path is essentially a potential node
TreeRowReference	Typedefed as Gtk::TreeModel::RowReference
TreeSelection	Typedefed as Gtk::TreeView::Selection
TreeSortable
TreeStore
TreeView	Displays the model (Gtk::TreeModel) data and allows the user to interact with it
TreeViewColumn	Typedefed as Gtk::TreeView::Column
UIManager	Constructing menus and toolbars from an XML description
Viewport	An adapter which makes widgets scrollable
VolumeButton	A button which pops up a volume control
Widget	Abstract Widget (Base class for all widgets)
WidgetPath	This represents a widget hierarchy from the topmost widget, typically a toplevel, to any child
WindowGroup	Limit the effect of grabs
Window	Toplevel Window This represents all widgets which are physical windows controlled by the window manager
PageSetupUnixDialog	PageSetupUnixDialog implements a page setup dialog for platforms which don't provide a native page setup dialog, like Unix
Printer	A Printer object represents a printer
PrintJob	A PrintJob object represents a job that is sent to a printer
PrintUnixDialog	PrintUnixDialog implements a print dialog for platforms which don't provide a native print dialog, like Unix
Plug	Toplevel for embedding into other processes
Socket	Container for widgets from other processes
ColorSelection	A widget used to select a color
ColorSelectionDialog	This dialog allows the user to select a color
FontSelection	A widget for selecting fonts
FontSelectionDialog	A dialog box for selecting fonts
HandleBox	A widget for detachable window portions
VButtonBox	A container for arranging buttons vertically
HButtonBox	A container for arranging buttons horizontally
HPaned	The Gtk::HPaned widget is a container widget with two children arranged horizontally
VPaned	The Gtk::VPaned widget is a container widget with two children arranged vertically
VScale	A vertical slider for selecting values
HScale	A horizontal slider for selecting values
VScrollbar	A vertical scrollbar
HScrollbar	A horizontal scrollbar
VSeparator	Vertical line widget
HSeparator	Horizontal line widget
IconFactory
IconSet	This manages a set of variants of a particular icon An IconSet contains variants for different sizes and widget states
IconSource
ImageMenuItem	A menu item with an icon
StockItem
Table	Pack widgets in regular patterns
TearoffMenuItem	A special Gtk::MenuItem which is used to tear off and reattach its menu
AccelKey	Defines accelerator key combinations
ListViewText	A simple listbox which presents some lines of information in columns and lets the user select some of them
TextModelColumns
Object	Gtk::Object is the base class for all widgets, and for a few non-widget objects such as Gtk::Adjustment
RadioButtonGroup	RadioButtonGroup identifier for RadioButtons To set up this RadioButtonGroup, construct a RadioButtonGroup and then pass it to the constructor of all radio items
TargetEntry
TreeModelColumnRecord	Typedefed as TreeModel::ColumnRecord
TreeModelColumnBase	Base class of TreeModelColumn templates
TreeModelColumn	A Gtk::TreeModelColumn describes the C++ type of the data in a model column, and identifies that column in the model
BuiltinStockID	See the list of pre-defined stock items, in the Stock namespace
StockID	See also Gtk::BuiltinStockID
std
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