HTk.Kernel.Geometry

The module Geometry exports basic geometric types and functionality.

Documentation

newtype Distance

The Distance datatype - general representation of distances in HTk.

Constructors

Distance Int

Instances

Enum Distance

Internal.

Methods

succ :: Distance -> Distance

pred :: Distance -> Distance

toEnum :: Int -> Distance

fromEnum :: Distance -> Int

enumFrom :: Distance -> [Distance]

enumFromThen :: Distance -> Distance -> [Distance]

enumFromTo :: Distance -> Distance -> [Distance]

enumFromThenTo :: Distance -> Distance -> Distance -> [Distance]

Eq Distance

Methods

(==) :: Distance -> Distance -> Bool

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

Integral Distance

Internal.

Methods

quot :: Distance -> Distance -> Distance

rem :: Distance -> Distance -> Distance

div :: Distance -> Distance -> Distance

mod :: Distance -> Distance -> Distance

quotRem :: Distance -> Distance -> (Distance, Distance)

divMod :: Distance -> Distance -> (Distance, Distance)

toInteger :: Distance -> Integer

Num Distance

Internal.

Methods

(+) :: Distance -> Distance -> Distance

(-) :: Distance -> Distance -> Distance

(*) :: Distance -> Distance -> Distance

negate :: Distance -> Distance

abs :: Distance -> Distance

signum :: Distance -> Distance

fromInteger :: Integer -> Distance

Ord Distance

Methods

compare :: Distance -> Distance -> Ordering

(<) :: Distance -> Distance -> Bool

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

(>) :: Distance -> Distance -> Bool

(>=) :: Distance -> Distance -> Bool

max :: Distance -> Distance -> Distance

min :: Distance -> Distance -> Distance

Read Distance

Internal.

Methods

readsPrec :: Int -> ReadS Distance

readList :: ReadS [Distance]

readPrec :: ReadPrec Distance

readListPrec :: ReadPrec [Distance]

Real Distance

Internal.

Methods

toRational :: Distance -> Rational

Show Distance

Internal.

Methods

showsPrec :: Int -> Distance -> ShowS

show :: Distance -> String

showList :: [Distance] -> ShowS

GUIValue Distance

Internal.

Methods

cdefault :: Distance

toGUIValue :: Distance -> GUIVALUE

maybeGUIValue :: GUIVALUE -> Maybe Distance

fromGUIValue :: GUIVALUE -> Distance

HasIndex Editor i BaseIndex => HasIndex Editor i (Distance, Distance)

Internal.

Methods

getBaseIndex :: Editor -> i -> IO (Distance, Distance)

HasSelectionBaseIndexRange Editor (Distance, Distance)

You can select a text range inside an editor widget.

Methods

getSelectionStart :: Editor -> IO (Maybe (Distance, Distance))

getSelectionEnd :: Editor -> IO (Maybe (Distance, Distance))

getSelectionRange :: Editor -> IO (Maybe ((Distance, Distance), (Distance, Distance)))

HasSelectionBaseIndex Editor ((Distance, Distance), (Distance, Distance))

You can select a text range inside an editor widget.

Methods

getSelection :: Editor -> IO (Maybe ((Distance, Distance), (Distance, Distance)))

HasInsertionCursorIndexGet Editor (Distance, Distance)

You can get the position of the insertion cursor of an editor widget.

Methods

getInsertionCursor :: Editor -> IO (Distance, Distance)

HasIndex Editor (Distance, Distance) BaseIndex

A pair of line and character is a valid index for an editor widget.

Methods

getBaseIndex :: Editor -> (Distance, Distance) -> IO BaseIndex

GUIValue [(Distance, Distance)]

Internal.

Methods

cdefault :: [(Distance, Distance)]

toGUIValue :: [(Distance, Distance)] -> GUIVALUE

maybeGUIValue :: GUIVALUE -> Maybe [(Distance, Distance)]

fromGUIValue :: GUIVALUE -> [(Distance, Distance)]

GUIValue [Distance]

Internal.

Methods

cdefault :: [Distance]

toGUIValue :: [Distance] -> GUIVALUE

maybeGUIValue :: GUIVALUE -> Maybe [Distance]

fromGUIValue :: GUIVALUE -> [Distance]

GUIValue (Distance, Distance)

Internal.

Methods

cdefault :: (Distance, Distance)

toGUIValue :: (Distance, Distance) -> GUIVALUE

maybeGUIValue :: GUIVALUE -> Maybe (Distance, Distance)

fromGUIValue :: GUIVALUE -> (Distance, Distance)

GUIValue (Distance, Distance, Distance, Distance)

Internal.

Methods

cdefault :: (Distance, Distance, Distance, Distance)

toGUIValue :: (Distance, Distance, Distance, Distance) -> GUIVALUE

maybeGUIValue :: GUIVALUE -> Maybe (Distance, Distance, Distance, Distance)

fromGUIValue :: GUIVALUE -> (Distance, Distance, Distance, Distance)

type Size = (Distance, Distance)

The Size datatype - a pair of two Distance values.

type Coord = [Position]

The Coord datatype - e.g. representing the coords of a canvas item.

type Position = (Distance, Distance)

The Position - a pair of two Distance values.

type Geometry = (Distance, Distance, Distance, Distance)

The Geometry datatype - normally representing position, width and height.

cm :: Double -> Distance

Conversion from cm to Distance.

pp :: Double -> Distance

Conversion from points to Distance.

mm :: Double -> Distance

Conversion from mm to Distance.

ic :: Double -> Distance

Conversion from inch to Distance.

tocm :: Distance -> Double

Conversion from Distance to cm.

toinch :: Distance -> Double

Conversion from Distance to inch.