XMonad.Layout.Decoration

A layout modifier and a class for easily creating decorated layouts.

Usage:

This module is intended for layout developers, who want to decorate their layouts. End users will not find here very much for them.

For examples of DecorationStyle instances you can have a look at XMonad.Layout.SimpleDecoration, XMonad.Layout.Tabbed, XMonad.Layout.DwmStyle, or XMonad.Layout.TabBarDecoration.

decoration :: (DecorationStyle ds a, Shrinker s) => s -> Theme -> ds a -> l a -> ModifiedLayout (Decoration ds s) l a

A layout modifier that, with a Shrinker, a Theme, a DecorationStyle, and a layout, will decorate this layout according to the decoration style provided.

For some usage examples see XMonad.Layout.DecorationMadness.

data Theme

A Theme is a record of colors, font etc., to customize a DecorationStyle.

For a collection of Themes see XMonad.Util.Themes

Constructors

Theme

Fields

activeColor :: String

Color of the active window

inactiveColor :: String

Color of the inactive window

urgentColor :: String

Color of the urgent window

activeBorderColor :: String

Color of the border of the active window

inactiveBorderColor :: String

Color of the border of the inactive window

urgentBorderColor :: String

Color of the border of the urgent window

activeTextColor :: String

Color of the text of the active window

inactiveTextColor :: String

Color of the text of the inactive window

urgentTextColor :: String

Color of the text of the urgent window

fontName :: String

Font name

decoWidth :: Dimension

Maximum width of the decorations (if supported by the DecorationStyle)

decoHeight :: Dimension

Height of the decorations

Instances

Read Theme

Show Theme

defaultTheme :: Theme

The default xmonad Theme.

data Decoration ds s a

The Decoration LayoutModifier. This data type is an instance of the LayoutModifier class. This data type will be passed, together with a layout, to the ModifiedLayout type constructor to modify the layout by adding decorations according to a DecorationStyle.

Instances

(DecorationStyle ds Window, Shrinker s) => LayoutModifier (Decoration ds s) Window

The long LayoutModifier instance for the Decoration type.

In redoLayout we check the state: if there is no state we initialize it.

The state is diffed against the list of windows produced by the underlying layout: removed windows get deleted and new ones decorated by createDecos, which will call decorate to decide if a window must be given a Rectangle, in which case a decoration window will be created.

After that we resync the updated state with the windows' list and then we process the resynced stated (as we do with a new state).

First we map the decoration windows, we update each decoration to reflect any decorated window's change, and we insert, in the list of windows and rectangles returned by the underlying layout, the decoration for each window. This way xmonad will restack the decorations and their windows accordingly. At the end we remove invisible/stacked windows.

Message handling is quite simple: when needed we release the state component of the Decoration LayoutModifier. Otherwise we call handleEvent, which will call the appropriate DecorationStyle methods to perform its tasks.

(Read s, Read (ds a)) => Read (Decoration ds s a)

(Show s, Show (ds a)) => Show (Decoration ds s a)

data DecorationMsg

A Decoration layout modifier will handle SetTheme, a message to dynamically change the decoration Theme.

Constructors

SetTheme Theme

Instances

Typeable DecorationMsg

Message DecorationMsg

class (Read (ds a), Show (ds a), Eq a) => DecorationStyle ds a where

The DecorationStyle class, defines methods used in the implementation of the Decoration LayoutModifier instance. A type instance of this class is passed to the Decoration type in order to decorate a layout, by using these methods.

Methods

describeDeco :: ds a -> String

The description that the Decoration modifier will display.

shrink :: ds a -> Rectangle -> Rectangle -> Rectangle

Shrink the window's rectangle when applying a decoration.

decorationEventHook :: ds a -> DecorationState -> Event -> X ()

The decoration event hook, where the decorationMouseFocusHook and decorationMouseDragHook are called. If you reimplement it those methods will not be called.

decorationMouseFocusHook :: ds a -> DecorationState -> Event -> X ()

This method is called when the user clicks the pointer over the decoration.

decorationMouseDragHook :: ds a -> DecorationState -> Event -> X ()

This method is called when the user starts grabbing the decoration.

pureDecoration :: ds a -> Dimension -> Dimension -> Rectangle -> Stack a -> [(a, Rectangle)] -> (a, Rectangle) -> Maybe Rectangle

The pure version of the main method, decorate.

decorate :: ds a -> Dimension -> Dimension -> Rectangle -> Stack a -> [(a, Rectangle)] -> (a, Rectangle) -> X (Maybe Rectangle)

Given the theme's decoration width and height, the screen rectangle, the windows stack, the list of windows and rectangles returned by the underlying layout and window to be decorated, tupled with its rectangle, produce a Just Rectangle or Nothing if the window is not to be decorated.

Instances

Eq a => DecorationStyle DefaultDecoration a

Eq a => DecorationStyle TabbedDecoration a

Eq a => DecorationStyle DwmStyle a

Eq a => DecorationStyle SimpleDecoration a

Eq a => DecorationStyle NoFrillsDecoration a

Eq a => DecorationStyle TabBarDecoration a

data DefaultDecoration a

The default DecorationStyle, with just the default methods' implementations.

Constructors

DefaultDecoration

Instances

Eq a => DecorationStyle DefaultDecoration a

Read (DefaultDecoration a)

Show (DefaultDecoration a)

class (Read s, Show s) => Shrinker s where

Methods

shrinkIt :: s -> String -> [String]

Instances

Shrinker DefaultShrinker

Shrinker CustomShrink

data DefaultShrinker

Instances

Read DefaultShrinker

Show DefaultShrinker

Shrinker DefaultShrinker

shrinkText :: DefaultShrinker

data CustomShrink

Constructors

CustomShrink

Instances

Read CustomShrink

Show CustomShrink

Shrinker CustomShrink

shrinkWhile :: (String -> [String]) -> (String -> X Bool) -> String -> X String

isInStack :: Eq a => Stack a -> a -> Bool

True if the window is in the Stack. The Window comes second to facilitate list processing, even though w `isInStack` s won't work...;)

isVisible :: Rectangle -> [Rectangle] -> Bool

Given a Rectangle and a list of Rectangles is True if the Rectangle is not completely contained by any Rectangle of the list.

isInvisible :: Rectangle -> [Rectangle] -> Bool

The contrary of isVisible.

isWithin :: Rectangle -> Rectangle -> Bool

True is the first Rectangle is totally within the second Rectangle.

fi :: (Integral a, Num b) => a -> b

Short-hand for fromIntegral

findWindowByDecoration :: Window -> DecorationState -> Maybe (OrigWin, (Window, Maybe Rectangle))

module XMonad.Layout.LayoutModifier