 | Gtk2Hs | Contents | Index |
| Graphics.UI.Gtk.Abstract.Bin |
|
| Contents |
| data Bin |
| class ContainerClass o => BinClass o |
| castToBin :: GObjectClass obj => obj -> Bin |
| toBin :: BinClass o => o -> Bin |
| binGetChild :: BinClass self => self -> IO (Maybe Widget) |
The Bin widget is a container with just one child. It is not very useful itself, but it is useful for deriving subclasses, since it provides common code needed for handling a single child widget.
Many Gtk+ widgets are subclasses of Bin, including Window, Button, Frame, HandleBox, and ScrolledWindow.
| GObject | +----Object | +----Widget | +----Container | +----Bin | +----Window | +----Alignment | +----Frame | +----Button | +----Item | +----ComboBox | +----EventBox | +----Expander | +----HandleBox | +----ToolItem | +----ScrolledWindow | +----Viewport
| :: BinClass self | |
| => self | returns pointer to child of the Bin |
| -> IO (Maybe Widget) | |
| Gets the child of the Bin, or Nothing if the bin contains no child widget. | |