XMonad.Actions.TreeSelect

TreeSelect displays your workspaces or actions in a Tree-like format. You can select the desired workspace/action with the cursor or hjkl keys.

This module is fully configurable and very useful if you like to have a lot of workspaces.

Only the nodes up to the currently selected are displayed. This will be configurable in the near future by changing ts_hidechildren to False, this is not yet implemented.

Usage

These imports are used in the following example

import Data.Tree
import XMonad.Actions.TreeSelect
import XMonad.Hooks.WorkspaceHistory
import qualified XMonad.StackSet as W

For selecting Workspaces, you need to define them in a tree structure using Node instead of just a standard list

Here is an example workspace-tree

myWorkspaces :: Forest String
myWorkspaces = [ Node "Browser" [] -- a workspace for your browser
               , Node "Home"       -- for everyday activity's
                   [ Node "1" []   --  with 4 extra sub-workspaces, for even more activity's
                   , Node "2" []
                   , Node "3" []
                   , Node "4" []
                   ]
               , Node "Programming" -- for all your programming needs
                   [ Node "Haskell" []
                   , Node "Docs"    [] -- documentation
                   ]
               ]

Then add it to your workspaces using the toWorkspaces function.

Optionally, if you add workspaceHistoryHook to your logHook you can use the 'o' and 'i' keys to select from previously-visited workspaces

xmonad $ def { ...
             , workspaces = toWorkspaces myWorkspaces
             , logHook = workspaceHistoryHook
             }

After that you still need to bind buttons to treeselectWorkspace to start selecting a workspaces and moving windows

you could bind Mod-f to switch workspace

 , ((modMask, xK_f), treeselectWorkspace myTreeConf myWorkspaces W.greedyView)

and bind Mod-Shift-f to moving the focused windows to a workspace

 , ((modMask .|. shiftMask, xK_f), treeselectWorkspace myTreeConf myWorkspaces W.shift)

treeselectWorkspace

Arguments

:: TSConfig WorkspaceId

-> Forest String

your tree of workspace-names

-> (WorkspaceId -> WindowSet -> WindowSet)

the "view" function. Instances can be greedyView for switching to a workspace and/or shift for moving the focused window to a selected workspace.

These actions can also be combined by doing

\i -> W.greedyView i . W.shift i

-> X ()

Select a workspace and execute a "view" function from XMonad.StackSet on it.

toWorkspaces :: Forest String -> [WorkspaceId]

Convert the workspace-tree to a flat list of paths such that XMonad can use them

The Nodes will be separated by a dot ('.') character

treeselectAction :: TSConfig (X a) -> Forest (TSNode (X a)) -> X ()

Select from a Tree of X actions

Each of these actions have to be specified inside a TSNode

Example

treeselectAction myTreeConf
   [ Node (TSNode "Hello"    "displays hello"      (spawn "xmessage hello!")) []
   , Node (TSNode "Shutdown" "Poweroff the system" (spawn "shutdown")) []
   , Node (TSNode "Brightness" "Sets screen brightness using xbacklight" (return ()))
       [ Node (TSNode "Bright" "FULL POWER!!"            (spawn "xbacklight -set 100")) []
       , Node (TSNode "Normal" "Normal Brightness (50%)" (spawn "xbacklight -set 50"))  []
       , Node (TSNode "Dim"    "Quite dark"              (spawn "xbacklight -set 10"))  []
       ]
   ]

Configuring

The selection menu is very configurable, you can change the font, all colors and the sizes of the boxes.

The default config defined as def

def = TSConfig { ts_hidechildren = True
               , ts_background   = 0xc0c0c0c0
               , ts_font         = "xft:Sans-16"
               , ts_node         = (0xff000000, 0xff50d0db)
               , ts_nodealt      = (0xff000000, 0xff10b8d6)
               , ts_highlight    = (0xffffffff, 0xffff0000)
               , ts_extra        = 0xff000000
               , ts_node_width   = 200
               , ts_node_height  = 30
               , ts_originX      = 0
               , ts_originY      = 0
               , ts_indent       = 80
               , ts_navigate     = defaultNavigation
               }

type Pixel = Word64

The Pixel Color format is in the form of 0xaarrggbb

Note that transparency is only supported if you have a window compositor running like compton

Some Examples:

white       = 0xffffffff
black       = 0xff000000
red         = 0xffff0000
green       = 0xff00ff00
blue        = 0xff0000ff
transparent = 0x00000000

data TSConfig a

Extensive configuration for displaying the tree.

This class also has a Default instance

Constructors

TSConfig

Fields

• ts_hidechildren :: Bool

  when enabled, only the parents (and their first children) of the current node will be shown (This feature is not yet implemented!)

• ts_background :: Pixel

  background color filling the entire screen.

• ts_font :: String

  XMF font for drawing the node name extra text

• ts_node :: (Pixel, Pixel)

  node foreground (text) and background color when not selected

• ts_nodealt :: (Pixel, Pixel)

  every other node will use this color instead of ts_node

• ts_highlight :: (Pixel, Pixel)

  node foreground (text) and background color when selected

• ts_extra :: Pixel

  extra text color

• ts_node_width :: Int

  node width in pixels

• ts_node_height :: Int

  node height in pixels

• ts_originX :: Int

  tree X position on the screen in pixels

• ts_originY :: Int

  tree Y position on the screen in pixels

• ts_indent :: Int

  indentation amount for each level in pixels

• ts_navigate :: Map (KeyMask, KeySym) (TreeSelect a (Maybe a))

  key bindings for navigating the tree

Instances

Default (TSConfig a)

Defined in XMonad.Actions.TreeSelect

Methods

def :: TSConfig a

tsDefaultConfig :: TSConfig a

Deprecated: Use def (from Data.Default, and re-exported by XMonad.Actions.TreeSelect) instead.

Default configuration.

Using nice alternating blue nodes

def :: Default a => a

The default value for this type.

Navigation

Keybindings for navigations can also be modified

This is the definition of defaultNavigation

defaultNavigation :: M.Map (KeyMask, KeySym) (TreeSelect a (Maybe a))
defaultNavigation = M.fromList
    [ ((0, xK_Escape), cancel)
    , ((0, xK_Return), select)
    , ((0, xK_space),  select)
    , ((0, xK_Up),     movePrev)
    , ((0, xK_Down),   moveNext)
    , ((0, xK_Left),   moveParent)
    , ((0, xK_Right),  moveChild)
    , ((0, xK_k),      movePrev)
    , ((0, xK_j),      moveNext)
    , ((0, xK_h),      moveParent)
    , ((0, xK_l),      moveChild)
    , ((0, xK_o),      moveHistBack)
    , ((0, xK_i),      moveHistForward)
    ]

defaultNavigation :: Map (KeyMask, KeySym) (TreeSelect a (Maybe a))

Default navigation

• navigation using either arrow key or vi style hjkl
• Return or Space to confirm
• Escape or Backspace to cancel to

select :: TreeSelect a (Maybe a)

Quit returning the currently selected node

cancel :: TreeSelect a (Maybe a)

Quit without returning anything

moveParent :: TreeSelect a (Maybe a)

Move the cursor to its parent node

moveChild :: TreeSelect a (Maybe a)

Move the cursor one level down, highlighting its first child-node

moveNext :: TreeSelect a (Maybe a)

Move the cursor to the next child-node

movePrev :: TreeSelect a (Maybe a)

Move the cursor to the previous child-node

moveHistBack :: TreeSelect a (Maybe a)

Move backwards in history

moveHistForward :: TreeSelect a (Maybe a)

Move forward in history

moveTo

Arguments

:: [String]

path, always starting from the top

-> TreeSelect a (Maybe a)

Move to a specific node

Advanced usage

This module can also be used to select any other action

data TSNode a

Tree Node With a name and extra text

Constructors

TSNode

Fields

• tsn_name :: String
• tsn_extra :: String

  extra text, displayed next to the node name

• tsn_value :: a

  value to return when this node is selected

treeselect

Arguments

:: TSConfig a

config file

-> Forest (TSNode a)

a list of Trees to select from.

-> X (Maybe a)

Run Treeselect with a given config and tree. This can be used for selectiong anything

• for switching workspaces and moving windows use treeselectWorkspace
• for selecting actions use treeselectAction

treeselectAt

Arguments

:: TSConfig a

config file

-> TreeZipper (TSNode a)

tree structure with a cursor position (starting node)

-> [[String]]

list of paths that can be navigated with moveHistBack and moveHistForward (bound to the o and i keys)

-> X (Maybe a)

Same as treeselect but ad a specific starting position