XMonad.Actions.GridSelect

GridSelect displays items(e.g. the opened windows) in a 2D grid and lets the user select from it with the cursor/hjkl keys or the mouse.

Usage

You can use this module with the following in your ~/.xmonad/xmonad.hs:

    import XMonad.Actions.GridSelect

Then add a keybinding, e.g.

    , ((modm, xK_g), goToSelected defaultGSConfig)

This module also supports displaying arbitrary information in a grid and letting the user select from it. E.g. to spawn an application from a given list, you can use the following:

   , ((modm, xK_s), spawnSelected defaultGSConfig ["xterm","gmplayer","gvim"])

Customizing

Using a common GSConfig

It is possible to bind a gsconfig at top-level in your configuration. Like so:

 -- the top of your config
 {-# LANGUAGE NoMonomorphismRestriction #-}
 import XMonad
 ...
 gsconfig1 = defaultGSConfig { gs_cellheight = 30, gs_cellwidth = 100 }

An example where buildDefaultGSConfig is used instead of defaultGSConfig in order to specify a custom colorizer is gsconfig2 (found in XMonad.Actions.GridSelect):

 gsconfig2 colorizer = (buildDefaultGSConfig colorizer) { gs_cellheight = 30, gs_cellwidth = 100 }

 -- | A green monochrome colorizer based on window class
 greenColorizer = colorRangeFromClassName
                      black            -- lowest inactive bg
                      (0x70,0xFF,0x70) -- highest inactive bg
                      black            -- active bg
                      white            -- inactive fg
                      white            -- active fg
   where black = minBound
         white = maxBound

Then you can bind to:

     ,((modm, xK_g), goToSelected  $ gsconfig2 myWinColorizer)
     ,((modm, xK_p), spawnSelected $ spawnSelected defaultColorizer)

Custom keybindings

You can build you own navigation mode and submodes by combining the exported action ingredients and assembling them using makeXEventhandler and shadowWithKeymap.

 myNavigation :: TwoD a (Maybe a)
 myNavigation = makeXEventhandler $ shadowWithKeymap navKeyMap navDefaultHandler
  where navKeyMap = M.fromList [
           ((0,xK_Escape), cancel)
          ,((0,xK_Return), select)
          ,((0,xK_slash) , substringSearch myNavigation)
          ,((0,xK_Left)  , move (-1,0)  >> myNavigation)
          ,((0,xK_h)     , move (-1,0)  >> myNavigation)
          ,((0,xK_Right) , move (1,0)   >> myNavigation)
          ,((0,xK_l)     , move (1,0)   >> myNavigation)
          ,((0,xK_Down)  , move (0,1)   >> myNavigation)
          ,((0,xK_j)     , move (0,1)   >> myNavigation)
          ,((0,xK_Up)    , move (0,-1)  >> myNavigation)
          ,((0,xK_y)     , move (-1,-1) >> myNavigation)
          ,((0,xK_i)     , move (1,-1)  >> myNavigation)
          ,((0,xK_n)     , move (-1,1)  >> myNavigation)
          ,((0,xK_m)     , move (1,-1)  >> myNavigation)
          ,((0,xK_space) , setPos (0,0) >> myNavigation)
          ]
        -- The navigation handler ignores unknown key symbols
        navDefaultHandler = const myNavigation

You can then define gsconfig3 which may be used in exactly the same manner as gsconfig1:

 gsconfig3 = defaultGSConfig
    { gs_cellheight = 30
    , gs_cellwidth = 100
    , gs_navigate = myNavigation
    }

Configuration

data GSConfig a

Constructors

GSConfig

Fields

gs_cellheight :: Integer

gs_cellwidth :: Integer

gs_cellpadding :: Integer

gs_colorizer :: a -> Bool -> X (String, String)

gs_font :: String

gs_navigate :: TwoD a (Maybe a)

gs_originFractX :: Double

gs_originFractY :: Double

defaultGSConfig :: HasColorizer a => GSConfig a

A basic configuration for gridselect, with the colorizer chosen based on the type.

If you want to replace the gs_colorizer field, use buildDefaultGSConfig instead, to avoid ambiguous type variables.

type TwoDPosition = (Integer, Integer)

buildDefaultGSConfig :: (a -> Bool -> X (String, String)) -> GSConfig a

Builds a default gs config from a colorizer function.

Variations on gridselect

gridselect :: GSConfig a -> [(String, a)] -> X (Maybe a)

Brings up a 2D grid of elements in the center of the screen, and one can select an element with cursors keys. The selected element is returned.

gridselectWindow :: GSConfig Window -> X (Maybe Window)

Like gridSelect but with the current windows and their titles as elements

withSelectedWindow :: (Window -> X ()) -> GSConfig Window -> X ()

Brings up a 2D grid of windows in the center of the screen, and one can select a window with cursors keys. The selected window is then passed to a callback function.

bringSelected :: GSConfig Window -> X ()

Brings selected window to the current workspace.

goToSelected :: GSConfig Window -> X ()

Switches to selected window's workspace and focuses that window.

gridselectWorkspace :: GSConfig WorkspaceId -> (WorkspaceId -> WindowSet -> WindowSet) -> X ()

Select a workspace and view it using the given function (normally view or greedyView)

Another option is to shift the current window to the selected workspace:

 gridselectWorkspace (\ws -> W.greedyView ws . W.shift ws)

spawnSelected :: GSConfig String -> [String] -> X ()

Select an application to spawn from a given list

runSelectedAction :: GSConfig (X ()) -> [(String, X ())] -> X ()

Select an action and run it in the X monad

Colorizers

class HasColorizer a where

That is fromClassName if you are selecting a Window, or defaultColorizer if you are selecting a String. The catch-all instance HasColorizer a uses the focusedBorderColor and normalBorderColor colors.

Methods

defaultColorizer :: a -> Bool -> X (String, String)

Instances

HasColorizer String

HasColorizer a

HasColorizer Window

fromClassName :: Window -> Bool -> X (String, String)

Colorize a window depending on it's className.

stringColorizer :: String -> Bool -> X (String, String)

Default colorizer for Strings

colorRangeFromClassName

Arguments

:: (Word8, Word8, Word8)

Beginning of the color range

-> (Word8, Word8, Word8)

End of the color range

-> (Word8, Word8, Word8)

Background of the active window

-> (Word8, Word8, Word8)

Inactive text color

-> (Word8, Word8, Word8)

Active text color

-> Window

-> Bool

-> X (String, String)

A colorizer that picks a color inside a range, and depending on the window's class.

Navigation Mode assembly

data TwoD a b

Instances

Monad (TwoD a)

Functor (TwoD a)

Applicative (TwoD a)

MonadState (TwoDState a) (TwoD a)

makeXEventhandler :: ((KeySym, String, KeyMask) -> TwoD a (Maybe a)) -> TwoD a (Maybe a)

Embeds a key handler into the X event handler that dispatches key events to the key handler, while non-key event go to the standard handler.

shadowWithKeymap :: Map (KeyMask, KeySym) a -> ((KeySym, String, KeyMask) -> a) -> (KeySym, String, KeyMask) -> a

When the map contains (KeySym,KeyMask) tuple for the given event, the associated action in the map associated shadows the default key handler

Built-in Navigation Mode

defaultNavigation :: TwoD a (Maybe a)

By default gridselect used the defaultNavigation action, which binds left,right,up,down and vi-style h,l,j,k navigation. Return quits gridselect, returning the selected element, while Escape cancels the selection. Slash enters the substring search mode. In substring search mode, every string-associated keystroke is added to a search string, which narrows down the object selection. Substring search mode comes back to regular navigation via Return, while Escape cancels the search. If you want that navigation style, add defaultNavigation as gs_navigate to your GSConfig object. This is done by buildDefaultGSConfig automatically.

substringSearch :: TwoD a (Maybe a) -> TwoD a (Maybe a)

Navigation submode used for substring search. It returns to the first argument navigation style when the user hits Return.

navNSearch :: TwoD a (Maybe a)

This navigation style combines navigation and search into one mode at the cost of losing vi style navigation. With this style, there is no substring search submode, but every typed character is added to the substring search.

Navigation Components

setPos :: (Integer, Integer) -> TwoD a ()

Sets the absolute position of the cursor.

move :: (Integer, Integer) -> TwoD a ()

Moves the cursor by the offsets specified

moveNext :: TwoD a ()

movePrev :: TwoD a ()

select :: TwoD a (Maybe a)

Closes gridselect returning the element under the cursor

cancel :: TwoD a (Maybe a)

Closes gridselect returning no element.

transformSearchString :: (String -> String) -> TwoD a ()

Apply a transformation function the current search string

Screenshots

Selecting a workspace:

Selecting a window by title:

Types

data TwoDState a

Instances

MonadState (TwoDState a) (TwoD a)