Graphics.HGL.Window

Unbuffered	use a double buffer to reduce flicker. You should probably use this for animations.
DoubleBuffered	draw directly to the window. This runs slightly faster but is more prone to flicker.

openWindowEx

:: Title	title of the window
-> Maybe Point	the optional initial position of a window
-> Size	initial size of the window
-> RedrawMode	how to display a graphic on the window
-> Maybe Time	the time between ticks (in milliseconds) of an optional timer associated with the window
-> IO Window
General window creation.

getWindowRect :: Window -> IO (Point, Size)

The position of the top left corner of the window on the screen, and the size of the window.

closeWindow :: Window -> IO ()

Close the window.

setGraphic :: Window -> Graphic -> IO ()

Set the current drawing in a window.

getGraphic :: Window -> IO Graphic

Get the current drawing in a window.

modGraphic :: Window -> (Graphic -> Graphic) -> IO ()

Update the drawing for a window. Note that this does not force a redraw.

directDraw :: Window -> Graphic -> IO ()

data Event

A user interface event.

Notes:

Programmers should assume that the Event datatype will be extended in the not-too-distant future and that individual events may change slightly. As a minimum, you should add a "match anything" alternative to any function which pattern matches against Events.
X11 systems typically have three button mice. Button 1 is used as the left button, button 3 as the right button and button 2 (the middle button) is ignored.

Constructors

Char a properly translated character, sent after a key press.

char :: Char

the character represented by a key combination

Key occurs when a key was pressed or released.

keysym :: Key	representation of the keyboard keys pressed
isDown :: Bool	if `True`, the key was pressed; otherwise it was released

Button occurs when a mouse button is pressed or released.

pt :: Point	the position of the mouse cursor
isLeft :: Bool	if `True`, it was the left button
isDown :: Bool	if `True`, the button was pressed; otherwise it was released

MouseMove occurs when the mouse is moved inside the window.

pt :: Point

the position of the mouse cursor after the movement

Resize occurs when the window is resized.

Closed occurs when the window is closed.

Instances

getWindowEvent :: Window -> IO Event

Wait for the next event on the given window.

maybeGetWindowEvent :: Window -> IO (Maybe Event)

Check for a pending event on the given window.

Timers that tick at regular intervals are set up by openWindowEx.

getWindowTick :: Window -> IO ()

Wait for the next tick event from the timer on the given window.

getTime :: IO Integer

Time in milliseconds since some arbitrary epoch.

Produced by Haddock version 0.7