HTk.Devices.Screen

The module Screen exports general functionality on the screen's properties.

Documentation

newtype Screen w

The Screen datatype.

Constructors

Screen w

getScreenHeight

Arguments

:: Window a

=> Screen a

the concerned screen.

-> IO Distance

The screen's height.

Gets the height of the screen.

getScreenWidth

Arguments

:: Window a

=> Screen a

the concerned screen.

-> IO Distance

The screen's width.

Gets the width of the screen.

getScreenManager

Arguments

:: Window a

=> Screen a

the concerned screen.

-> IO String

A textual representation of the screen manager.

Gets the screen manager from a screen.

data VisualClass

The VisualClass datatype (see Screen.getScreenVisual).

Constructors

DirectColour

GrayScale

PseudoColour

StaticColour

StaticGray

TrueColour

Instances

Enum VisualClass

Methods

succ :: VisualClass -> VisualClass

pred :: VisualClass -> VisualClass

toEnum :: Int -> VisualClass

fromEnum :: VisualClass -> Int

enumFrom :: VisualClass -> [VisualClass]

enumFromThen :: VisualClass -> VisualClass -> [VisualClass]

enumFromTo :: VisualClass -> VisualClass -> [VisualClass]

enumFromThenTo :: VisualClass -> VisualClass -> VisualClass -> [VisualClass]

Eq VisualClass

Methods

(==) :: VisualClass -> VisualClass -> Bool

(/=) :: VisualClass -> VisualClass -> Bool

Ord VisualClass

Methods

compare :: VisualClass -> VisualClass -> Ordering

(<) :: VisualClass -> VisualClass -> Bool

(<=) :: VisualClass -> VisualClass -> Bool

(>) :: VisualClass -> VisualClass -> Bool

(>=) :: VisualClass -> VisualClass -> Bool

max :: VisualClass -> VisualClass -> VisualClass

min :: VisualClass -> VisualClass -> VisualClass

Read VisualClass

Internal.

Methods

readsPrec :: Int -> ReadS VisualClass

readList :: ReadS [VisualClass]

readPrec :: ReadPrec VisualClass

readListPrec :: ReadPrec [VisualClass]

Show VisualClass

Internal.

Methods

showsPrec :: Int -> VisualClass -> ShowS

show :: VisualClass -> String

showList :: [VisualClass] -> ShowS

GUIValue VisualClass

Internal.

Methods

cdefault :: VisualClass

toGUIValue :: VisualClass -> GUIVALUE

maybeGUIValue :: GUIVALUE -> Maybe VisualClass

fromGUIValue :: GUIVALUE -> VisualClass

getScreenVisual

Arguments

:: Window a

=> Screen a

the concerned screen.

-> IO VisualClass

The visual properties.

Gets the visual properties of the screen.