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Scale

Description

HTk's scale widget. A simple slider in a through representing a range of numeric values.

Synopsis

class (Num a, GUIValue a) => ScaleValue a where toDouble :: a -> Double fromDouble :: Double -> a data Scale a newScale :: (GUIValue a, ScaleValue a, Container par) => par -> [Config (Scale a)] -> IO (Scale a) class HasIncrement w a where increment :: a -> Config w getIncrement :: w -> IO a digits :: Int -> Config (Scale a) getDigits :: Scale a -> IO Int interval :: (ScaleValue a) => (a, a) -> Config (Scale a) getInterval :: (ScaleValue a) => Scale a -> IO (a, a) intervalTo :: (ScaleValue a) => a -> Config (Scale a) getIntervalTo :: (ScaleValue a) => Scale a -> IO a intervalFrom :: (ScaleValue a) => a -> Config (Scale a) getIntervalFrom :: (ScaleValue a) => Scale a -> IO a newtype Slider w = Slider w class (Widget w) => HasSlider w where repeatInterval :: Int -> Config (Slider w) getRepeatInterval :: Slider w -> IO Int repeatDelay :: Int -> Config (Slider w) getRepeatDelay :: Slider w -> IO Int bigIncrement :: (ScaleValue a) => a -> Config (Slider (Scale a)) getBigIncrement :: (ScaleValue a) => Slider (Scale a) -> IO a showValue :: Toggle -> Config (Slider (Scale a)) getShowValue :: Slider (Scale a) -> IO Toggle

Documentation

class (Num a, GUIValue a) => ScaleValue a where

Values associated with a scale instansiate the class ScaleValue. Methods toDouble :: a -> Double fromDouble :: Double -> a Instances ScaleValue Double

data Scale a

The Scale datatype.

newScale :: (GUIValue a, ScaleValue a, Container par) => par -> [Config (Scale a)] -> IO (Scale a)

class HasIncrement w a where

Incrementable objects (e.g. scale wigdgets) instantiate the class HasIncrement. Methods increment :: a -> Config w Increments the object. getIncrement :: w -> IO a Gets object's incrementation. Instances (ScaleValue a) => HasIncrement (Scale a) a (ScaleValue a) => HasIncrement (Slider (Scale a)) a

digits :: Int -> Config (Scale a)

getDigits :: Scale a -> IO Int

Gets the number of significant values in the scale widget.

interval :: (ScaleValue a) => (a, a) -> Config (Scale a)

Sets the scale widgets maximum and minumum value.

getInterval :: (ScaleValue a) => Scale a -> IO (a, a)

Gets the scale widgets maximum and minumum value.

intervalTo :: (ScaleValue a) => a -> Config (Scale a)

Sets the maximum value of the scale widget.

getIntervalTo :: (ScaleValue a) => Scale a -> IO a

Gets the maximum value of the scale widget.

intervalFrom :: (ScaleValue a) => a -> Config (Scale a)

Sets the minimum value of the scale widget.

getIntervalFrom :: (ScaleValue a) => Scale a -> IO a

Gets the minimum value of the scale widget.

newtype Slider w

The Slider datatype. Constructors Slider w Instances (ScaleValue a) => HasIncrement (Slider (Scale a)) a HasSize (Slider (Scale a)) (GUIObject w) => GUIObject (Slider w) (HasSlider w, GUIObject w) => HasColour (Slider w)

class (Widget w) => HasSlider w where

Widgets with sliders (scale widget, scrollbar) instantiate the class HasSlider. Methods repeatInterval :: Int -> Config (Slider w) Sets the time period between auto-repeat events. getRepeatInterval :: Slider w -> IO Int Gets the time period between auto-repeat events. repeatDelay :: Int -> Config (Slider w) Sets the delay before auto-repeat starts (e.g. when mouse button is pressed). getRepeatDelay :: Slider w -> IO Int Gets the delay before auto-repeat starts. Instances HasSlider (Scale a) HasSlider ScrollBar

bigIncrement :: (ScaleValue a) => a -> Config (Slider (Scale a))

getBigIncrement :: (ScaleValue a) => Slider (Scale a) -> IO a

Gets the coarse grain slider adjustment value.

showValue :: Toggle -> Config (Slider (Scale a))

Shows the sliders value when set.

getShowValue :: Slider (Scale a) -> IO Toggle

Gets the current showvalue setting.

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