| X11 Libraries (X11 package) | Source code | Contents | Index
Graphics.X11.Xlib |
Portability | portable
Stability | provisional
Maintainer | libraries@haskell.org
Contents
Conventions Types X11 library functions
Description
A collection of FFI declarations for interfacing with Xlib. The library aims to provide a direct translation of the X binding into Haskell so the most important documentation you should read is The Xlib Programming Manual, available online at http://tronche.com/gui/x/xlib/. Let me say that again because it is very important. Get hold of this documentation and read it: it tells you almost everything you need to know to use this library.
Synopsis
module Graphics.X11.Types
data Display
data Screen
data Visual
data GC
data SetWindowAttributes
data Point = Point {
pt_x :: Position
pt_y :: Position
}
data Rectangle = Rectangle {
rect_x :: Position
rect_y :: Position
rect_width :: Dimension
rect_height :: Dimension
}
data Arc = Arc {
arc_x :: Position
arc_y :: Position
arc_width :: Dimension
arc_height :: Dimension
arc_angle1 :: Angle
arc_angle2 :: Angle
}
data Segment = Segment {
seg_x1 :: Position
seg_y1 :: Position
seg_x2 :: Position
seg_y2 :: Position
}
data Color = Color {
color_pixel :: Pixel
color_red :: Word16
color_green :: Word16
color_blue :: Word16
color_flags :: Word8
}
type Pixel = Word32
type Position = Int32
type Dimension = Word32
type Angle = CInt
type ScreenNumber = Word32
type Buffer = CInt
module Graphics.X11.Xlib.Event
module Graphics.X11.Xlib.Display
module Graphics.X11.Xlib.Screen
module Graphics.X11.Xlib.Window
module Graphics.X11.Xlib.Context
module Graphics.X11.Xlib.Color
module Graphics.X11.Xlib.Font
module Graphics.X11.Xlib.Atom
module Graphics.X11.Xlib.Region
module Graphics.X11.Xlib.Image
module Graphics.X11.Xlib.Misc
Conventions
In translating the library, we had to change names to conform with Haskell's lexical syntax: function names and names of constants must start with a lowercase letter; type names must start with an uppercase letter. The case of the remaining letters is unchanged. In addition, we chose to take advantage of Haskell's module system to allow us to drop common prefixes (`X`, `XA_`, etc.) attached to X11 identifiers. We named enumeration types so that function types would be easier to understand. For example, we added `Status`, `WindowClass`, etc. Note that the types are synonyms for `Int` so no extra typesafety was obtained. We consistently raise exceptions when a function returns an error code. In practice, this only affects the following functions because most Xlib functions do not return error codes: `allocColor`, `allocNamedColor`, `fetchBuffer`, `fetchBytes`, `fontFromGC`, `getGeometry`, `getIconName`, `iconifyWindow`, `loadQueryFont`, `lookupColor`, `openDisplay`, `parseColor`, `queryBestCursor`, `queryBestSize`, `queryBestStipple`, `queryBestTile`, `rotateBuffers`, `selectInput`, `storeBuffer`, `storeBytes`, `withdrawWindow`.
Types
module Graphics.X11.Types
data Display
pointer to an X11 `Display` structure
Instances
Data Display
Eq Display
Ord Display
Show Display
Typeable Display
data Screen
pointer to an X11 `Screen` structure
Instances
Data Screen
Eq Screen
Ord Screen
Show Screen
Typeable Screen
data Visual
pointer to an X11 `Visual` structure
Instances
Data Visual
Eq Visual
Ord Visual
Show Visual
Typeable Visual
data GC
pointer to an X11 `GC` structure
Instances
Data GC
Eq GC
Ord GC
Show GC
Typeable GC
data SetWindowAttributes
pointer to an X11 `XSetWindowAttributes` structure
Instances
Data SetWindowAttributes
Eq SetWindowAttributes
Ord SetWindowAttributes
Show SetWindowAttributes
Typeable SetWindowAttributes
data Point
counterpart of an X11 `XPoint` structure
Constructors
Point |
pt_x :: Position |
pt_y :: Position |
Instances
Data Point
Eq Point
Show Point
Storable Point
Typeable Point
data Rectangle
counterpart of an X11 `XRectangle` structure
Constructors
Rectangle |
rect_x :: Position |
rect_y :: Position |
rect_width :: Dimension |
rect_height :: Dimension |
Instances
Data Rectangle
Eq Rectangle
Show Rectangle
Storable Rectangle
Typeable Rectangle
data Arc
counterpart of an X11 `XArc` structure
Constructors
Arc |
arc_x :: Position |
arc_y :: Position |
arc_width :: Dimension |
arc_height :: Dimension |
arc_angle1 :: Angle |
arc_angle2 :: Angle |
Instances
Eq Arc
Show Arc
Storable Arc
Typeable Arc
data Segment
counterpart of an X11 `XSegment` structure
Constructors
Segment |
seg_x1 :: Position |
seg_y1 :: Position |
seg_x2 :: Position |
seg_y2 :: Position |
Instances
Data Segment
Eq Segment
Show Segment
Storable Segment
Typeable Segment
data Color
counterpart of an X11 `XColor` structure
Constructors
Color |
color_pixel :: Pixel |
color_red :: Word16 |
color_green :: Word16 |
color_blue :: Word16 |
color_flags :: Word8 |
Instances
Data Color
Eq Color
Show Color
Storable Color
Typeable Color
type Pixel = Word32
type Position = Int32
type Dimension = Word32
type Angle = CInt
type ScreenNumber = Word32
type Buffer = CInt
X11 library functions
module Graphics.X11.Xlib.Event
module Graphics.X11.Xlib.Display
module Graphics.X11.Xlib.Screen
module Graphics.X11.Xlib.Window
module Graphics.X11.Xlib.Context
module Graphics.X11.Xlib.Color
module Graphics.X11.Xlib.Font
module Graphics.X11.Xlib.Atom
module Graphics.X11.Xlib.Region
module Graphics.X11.Xlib.Image
module Graphics.X11.Xlib.Misc
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