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Destructible

Synopsis

class Destroyable o where destroy :: o -> IO () class (Destroyable o) => Destructible o where destroyed :: o -> Event () doOnce :: IO () -> IO (IO ())

Documentation

class Destroyable o where

Methods destroy :: o -> IO () Destroys an object Instances Destroyable Arc Destroyable BitMap Destroyable BitMapItem Destroyable Box Destroyable Button Destroyable Canvas Destroyable CanvasTag Destroyable (CheckButton a) Destroyable (ComboBox a) (GUIObject a) => Destroyable a Destroyable Editor Destroyable EmbeddedCanvasWin Destroyable EmbeddedTextWin Destroyable (Entry a) Destroyable Frame (CItem c) => Destroyable (GenGUI c) Destroyable HTk Destroyable IconBar Destroyable Image Destroyable ImageItem Destroyable Label Destroyable LabelFrame Destroyable Line Destroyable (ListBox a) Destroyable LogWin Destroyable Menu Destroyable MenuButton Destroyable Message Destroyable NoteBook Destroyable NoteBookPage Destroyable (NotepadItem a) Destroyable (Notepad a) Destroyable (OptionMenu a) Destroyable Oval Destroyable PanedWindow Destroyable Pane Destroyable Polygon Destroyable (RadioButton a) Destroyable Rectangle Destroyable (Scale a) Destroyable ScrollBar Destroyable (ScrollBox a) Destroyable SelectBox Destroyable Separator Destroyable Space Destroyable SpinButton Destroyable TextItem Destroyable TextTag Destroyable Toplevel (CItem c) => Destroyable (TreeList c) Destroyable Wish

class (Destroyable o) => Destructible o where

Methods destroyed :: o -> Event () An event which occurs when the object is destroyed.

doOnce :: IO () -> IO (IO ())

doOnce can be used to produce an action which is identical to its argument, except that if it's already been called, it does nothing.

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