HTk.Kernel.TkVariables

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• module HTk.Kernel.TkVariables
• author: ludi
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Documentation

newtype GUIValue a => TkVariable a

Constructors

TkVariable ObjectID

class GUIObject w => HasVariable w where

Minimal complete definition

Nothing

Methods

variable :: TkVariable v -> Config w

Instances

HasVariable MenuCheckButton

The polymorphic variable the menu checkbutton's value is associated with.

HasVariable MenuRadioButton

The polymorphic variable the menu radiobutton's value is associated with.

HasVariable (CheckButton a)

A checkbutton has a value, that corresponds to a polymorphic TkVariable. instance GUIValue a => HasValue (CheckButton a) a No, it doesn't.

The polymorphic variable the checkbutton's value is associated with.

HasVariable (Entry a)

The value of an entry field is associated with a polymorphic variable.

HasVariable (RadioButton a)

The radiobutton's value is associated with a polymorphic TkVariable.

createTkVariable :: GUIValue a => a -> IO (TkVariable a)

readTkVariable :: GUIValue a => TkVariable a -> IO a

setTkVariable :: GUIValue a => TkVariable a -> a -> IO ()