CHANGELOG

Qtile x.xx.x, released XXXX-XX-XX:
    !!! Config breakage !!!
        - lazy.qtile.display_kb() no longer receives any arguments. If you passed it any arguments
          (which were ignored previously), remove them.
    * features
        - Add ability to draw borders and add margins to the `Max` layout.
    * bugfixes
        - Widgets that are incompatible with a backend (e.g. Systray on Wayland) will no longer show 
          as a ConfigError in the bar. Instead the widget is silently removed from the bar and a message
          included in the logs.

Qtile 0.21.0, released 2022-03-23:
    * features
        - Add `lazy.window.center()` command to center a floating window on the screen.
        - Wayland: added power-output-management-v1 protocol support, added idle protocol,
          added idle inhibit protocol
        - Add MonadThreeCol layout based on XMonad's ThreeColumns.
        - Add `lazy.screen.set_wallpaper` command.
        - Added ability to scale the battery icon's size
        - Add Spiral layout
        - Add `toggle` argument to `Window.togroup` with the same functionality as in `Group.toscreen`.
        - Added `margin_on_single` and `border_on_single` to Bsp layout
    * bugfixes
        - Fix `Systray` crash on `reconfigure_screens`.
        - Fix bug where widgets can't be mirrored in same bar.
        - Fix various issues with setting fullscreen windows floating and vice versa.
        - Fix a bug where a .when() check for lazy functions errors out when matching
          on focused windows when none is focused. By default we do not match on focused windows,
          to change this set `if_no_focused` to True.
        - Widget with duplicate names will be automatically renamed by appending numeric suffixes
        - Fix resizing of wallpaper when screen scale changes (X11)
        - Two small bugfixes for `StatusNotifier` - better handling of Ayatana indicators
        - Fix bug where StatusNotifierItem crashes due to invalid object paths (e.g. Zoom)

Qtile 0.20.0, released 2022-01-24:
    * features
        - Add `place_right` option in the TreeTab layout to place the tab panel on the right side
        - X11: Add support for _NET_DESKTOP_VIEWPORT. E.g. can be used by rofi to map on current output.
        - Wayland: Bump wlroots version. 0.15.x wlroots and 0.15.2+ pywlroots are required.
        - Add XWayland support to the Wayland backend. XWayland will start up as needed, if it is installed.
    * bugfixes
        - Remove non-commandable windows from IPC. Fixes bug where IPC would fail when trying to get info
          on all windows but Systray has icons (which are non-commandable `_Window`s.)
        - Fix bug where bars were not reconfigured correctly when screen layout changes.
        - Fix a Wayland bug where layer-shell surface like dunst would freeze up and stop updating.
        - Change timing of `screens_reconfigured` hook. Will now be called ONLY if `cmd_reconfigure_screens`
          has been called and completed.
        - Fix order of icons in Systray widget when restarting/reloading config.
        - Fix rounding error in PulseVolume widget's reported volume.
        - Fix bug where Volume widget did not load images where `theme_path` had been set in `widget_defaults`.
        - Remove ability to have multiple `Systray` widgets. Additional `Systray` widgets will result in a
          ConfigError.
        - Release notification name from dbus when finalising `Notify` widget. This allows other notification
          managers to request the name.
        - Fix bug where `Battery` widget did not retrieve `background` from `widget_defaults`.
        - Fix bug where widgets in a `WidgetBox` are rendered on top of bar borders.

Qtile 0.19.0, released 2021-12-22:
    * features
        - Add ability to draw borders to the Bar. Can customise size and colour per edge.
        - Add `StatusNotifier` widget implementing the `StatusNotifierItem` specification.
          NB Widget does not provide context menus.
        - Add `total` bandwidth format value to the Net widget.
        - Scratchpad groups could be defined as single so that only one of the scratchpad in the group is visible
          at a given time.
        - All scratchpads in a Scratchpad group can be hidden with hide_all() function.
        - For saving states of scratchpads during restart, we use wids instead of pids.
        - Scratchpads can now be defined with an optional matcher to match with window properties.
        - `Qtile.cmd_reload_config` is added for reloading the config without completely restarting.
        - Window.cmd_togroup's argument `groupName` should be changed to
          `group_name`. For the time being a log warning is in place and a
          migration is added. In the future `groupName` will fail.
        - Add `min/max_ratio` to Tile layout and fix bug where windows can extend offscreen.
        - Add ability for widget `mouse_callbacks` to take `lazy` calls (similar to keybindings)
        - Add `aliases` to `lazy.spawncmd()` which takes a dictionary mapping convenient aliases
          to full command lines.
        - Add a new 'prefix' option to the net widget to display speeds with a static unit (e.g. MB).
        - `lazy.group.toscreen()` now does not toggle groups by default. To get this behaviour back, use
          `lazy.group.toscreen(toggle=True)`
        - Tile layout has new `margin_on_single` and `border_on_single` option to specify
          whether to draw margin and border when there is only one window.
        - Thermal zone widget.
        - Allow TextBox-based widgets to display in vertical bars.
        - Added a focused attribute to `lazy.function.when` which can be used to Match on focused windows.
        - Allow to update Image widget with update() function by giving a new path.
    * bugfixes
        - Windows are now properly re-ordered in the layouts when toggled on and off fullscreen

Qtile 0.18.1, released 2021-09-16:
    * features
        - All layouts will accept a list of colors for border_* options with which
          they will draw multiple borders on the appropriate windows.

Qtile 0.18.0, released 2021-07-04:
    !!! Config breakage !!!
        - The `qtile` entry point doesn't run `qtile start` by default anymore
        - New optional dependency for dbus related features: dbus-next.
          Replaces previous reliance on dbus/Glib and allows qtile to use async
          dbus calls within asyncio's eventloop.
        - widget.BatteryIcon no longer has a fallback text mode; use
          widget.Battery instead
        - MonadX layout key new_at_current is deprecated, use new_client_position.
        - `libqtile.window` has been moved to `libqtile.backend.x11.window`; a migration has been added for this.
    !!! deprecation warning !!!
        - 'main' config functions, deprecated in 0.16.1, will no longer be executed.
    !!! Notice for packagers - new dependencies !!!
        - Tests now require the 'dbus-next' python module plus 'dbus-launch' and 'notify-send' applications
    * features
        - added transparency in x11 and wayland backends
        - added measure_mem and measure_swap attributes to memory widget to allow user to choose measurement units.
        - memory widget can now be displayed with decimal values
        - new "qtile migrate" command, which will attempt to upgrade previous
          configs to the current version in the case of qtile API breaks.
        - A new `reconfigure_screens` config setting. When `True` (default) it
          hooks `Qtile.reconfigure_screens` to the `screen_change` hook,
          reconfiguring qtile's screens in response to randr events. This
          removes the need to restart qtile when adding/removing external
          monitors.
        - improved key chord / sequence functionality. Leaving a chord with `mode`
          set brings you to a named mode you activated before, see #2264.
          A new command, `lazy.ungrab_all_chords`, was introduced to return to the root bindings.
          The `enter_chord` hook is now always called with a string argument.
          The third argument to `KeyChord` was renamed from `submaping` to `submapping` (typo fix).
        - added new argument for CheckUpdates widget: `custom_command_modify` which allows user to modify the
          the line count of the output of `custom_command` with a lambda function (i.e. `lambda x: x-3`).
          Argument defaults to `lambda x: x` and is overridden by `distro` argument's internal lambda.
        - added new argument for the WindowName, WindowTabs and Tasklist widgets: `parse_text` which allows users to
          define a function that takes a window name as an input, modify it in some way (e.g. str.replace(), str.upper() or regex)
          and show that modification on screen.
        - A Wayland backend has been added which can be used by calling `qtile start -b wayland` directly in your TTY.
          It requires the latest releases of wlroots, python-xkbcommon, pywayland and pywlroots. It is expected to be
          unstable so please let us know if you find any bugs!
        - The 'focus` argument to `Click` and `Drag` objects in your config are no longer necessary (and are ignored).

Qtile 0.17.0, released 2021-02-13:
    !!! Python version breakage !!!
        - Python 3.5 and 3.6 are no longer supported
    !!! Config breakage !!!
        - Pacman widget has been removed. Use CheckUpdates instead.
        - Mpris widget has been removed. Use Mpris2 instead.
        - property "masterWindows" of Tile layout renamed to master_length
        - Match objects now only allow one string argument for their wm
          name/class/etc. properties. to update your config, do e.g.
                   Group('www', spawn='firefox', layout='xmonad',
              -          matches=[Match(wm_class=['Firefox', 'google-chrome', 'Google-chrome'])]),
              +          matches=[Match(wm_class='Firefox'), Match(wm_class='google-chrome'), Match(wm_class='Google-chrome')]),
        - properties wname, wmclass and role of Slice-layout replaced by Match-
          type property "match"
        - rules specified in `layout.Floating`'s `float_rules` are now evaluated with
          AND-semantics instead of OR-semantics, i.e. if you specify 2 different
          property rules, both have to match
        - check the new `float_rules` for `floating_layout` in the default config and
          extend your own rules appropriately: some non-configurable auto-floating rules
          were made explicit and added to the default config
        - using `dict`s for `layout.Floating`'s `float_rules` is now deprecated, please
          use `config.Match` objects instead
        - `no_reposition_match` in `layout.Floating` has been removed; use the list of
          `config.Match`-objects `no_reposition_rules` instead
        - Command line has been modernized to a single entry point, the `qtile`
          binary. Translations are below:
                qtile     -> qtile start
                qtile-cmd -> qtile cmd-obj
                qtile-run -> qtile run-cmd
                qtile-top -> qtile top
                qshell    -> qtile shell
          iqshell and dqtile-cmd are no longer distributed with the
          package, as they were either user or developer scripts. Both are
          still available in the qtile repo in /scripts.

          Running `qtile` without arguments will continue to work for the
          forseeable future, but will be eventually deprecated. qtile prints a
          warning when run in this configuration.
        - Qtile.cmd_focus_by_click is no longer an available command.
        - Qtile.cmd_get_info is no longer an available command.
        - libqtile.command_* has been deprecated, it has been moved to
          libqtile.command.*
        - libqtile.widget.base.ThreadedPollText has been removed; out of tree
          widgets can use ThreadPoolText in the same package instead.
        - the YahooWeather widget was removed since Yahoo retired their free
          tier of the weather API
        - Deprecated hook `window_name_change` got removed, use
          `client_name_updated` instead.
        - show_state attribute from WindowName widget has been removed. Use format attribute instead.
                show_state = True  -> format = '{state}{name}'
                show_state = False -> format = '{name}'
        - mouse_callbacks no longer receives the qtile object as an argument
          (they receive no arguments); import it via `from libqtile import
          qtile` instead.
    * features
        - new WidgetBox widget
        - new restart and shutdown hooks
        - rules specified in `layout.Floating`'s `float_rules` are now evaluated with
          AND-semantics, allowing for more complex and specific rules
        - Python 3.9 support
        - switch to Github Actions for CI
        - Columns layout has new `margin_on_single` option to specify margin
          size when there is only one window (default -1: use `margin` option).
        - new OpenWeather widget to replace YahooWeather
        - new format attribute for WindowName widget
        - new max_chars attribute for WindowName widget
        - libqtile now exports type information
        - add a new `qtile check` subcommand, which will check qtile configs
          for various things:
              - validates configs against the newly exported type information
                if mypy is present in the environment
              - validates that qtile can import the config file (e.g. that
                syntax is correct, ends in a .py extension, etc.)
              - validates Key and Mouse mod/keysym arguments are ok.
        - Columns layout now enables column swapping by using swap_column_left and swap_column_right
    !!! warning !!!
        - When (re)starting, Qtile passes its state to the new process in a
          file now, where previously it passed state directly as a string. This
          fixes a bug where some character encodings (i.e. in group names) were
          getting messed up in the conversion to/from said string. This change
          will cause issues if you update Qtile then restart it, causing the
          running old version to pass state in the previous format to the new
          process which recognises the new.

Qtile 0.16.1, released 2020-08-11:
    !!! Config breakage !!!
        - Hooks 'addgroup', 'delgroup' and 'screen_change' will no longer
          receive the qtile object as an argument. It can be accessed directly
          at libqtile.qtile.
    !!! deprecation warning !!!
        - defining a main function in your config is deprecated. You should use
          @hook.subscribe.startup_complete instead. If you need access to the
          qtile object, import it from libqtile directly.
    * bugfixes
        - include tests in the release for distros to consume
        - don't resize 0th screen incorrectly on root ConfigureNotify
        - expose qtile object as libqtile.qtile (note that we still consider
          anything not prefixed with cmd_ to be a private API)
        - fix transparent borders
        - MonadTall, MonadWide, and TreeTab now work with Slice

Qtile 0.16.0, released 2020-07-20:
    !!! Config breakage !!!
        - Imports from libqtile.widget are now made through a function
          proxy to avoid the side effects of importing all widgets at
          once. If you subclass a widget in your config, import it from
          its own module.
          e.g. from libqtile.widget.pomodoro import Pomodoro
    * features
        - added `guess_terminal` in utils
        - added keybinding cheet sheet image generator
        - custom keyboardlayout display
        - added native support for key chords
        - validate config before restart and refuse to restart with a bad
          config
        - added a bunch of type annotations to config objects (more to come)
    * bugfixes
        - major focus rework; Java-based IDEs such as PyCharm, NetBrains, etc.
          now focus correctly
        - fix a bug where spotify (or any window with focus-to=parent) was
          closed, nothing would be focused and no hotkeys would work
        - support windows unsetting the input hint
        - respects window's/user's location setting if present (WM_SIZE_HINTS)
        - fixed YahooWeather widget for new API
        - fix a bug where _NET_WM_DESKTOPS wasn't correctly updated when
          switching screens in some cases
        - fix a crash in the BSP layout
        - fix a stacktrace when unknown keysyms are encounted
        - make qtile --version output more sane
        - fix a rendering issue with special characters in window names
        - keyboard widget no longer re-sets the keyboard settings every second
        - fix qtile-top with the new IPC model
        - Image widget respects its background setting now
        - correctly re-draw non-focused screens on qtile restart
        - fix a crash when decoding images
        - fix the .when() constraint for lazy objects

Qtile 0.15.1, released 2020-04-14
    * bugfixes
        - fix qtile reload (it was crashing)

Qtile 0.15.0, released 2020-04-12:
    !!! Config breakage !!!
        - removed the mpd widget, which depended on python-mpd.
        - the Clock widget now requires pytz to handle timezones that are
          passed as string
        - libqtile.command.Client does not exist anymore and has been
          replaced by libqtile.command_client.CommandClient
    !!! deprecation warning !!!
        - libqtile.command.lazy is deprecated in favor of libqtile.lazy.lazy
    * features
        - Python 3.8 support
        - `wallpaper` and `wallpaper_mode` for screens
        - bars can now have margins
        - `lazy.toscreen` called twice will now toggle the groups
          (optional with the `toggle` parameter)
        - `lazy.window.togroup` now has `switch_group` parameter to follow
          the window to the group it is sent to
        - qtile now copies the default config if the config file does not exist
        - all widgets now use Pango markup by default
        - add an `fmt` option for all textbox widgets
        - new PulseVolume widget for controlling PulseAudio
        - new QuickExit widget, mainly for the default config
        - new non-graph CPU widget
        - KeyboardLayout widget: new `options` parameter
        - CheckUpdates widget: support ArchLinux yay
        - GroupBox widget: new `block_highlight_text_color` parameter
        - Mpd2 widget: new `color_progress` parameter
        - Maildir widget can now display the inbox grand total
        - the Net widget can now use bits as unit
        - Spacer widget: new `background_color` parameter
        - More consistent resize behavior in Columns layout
        - various improvements of the default config
        - large documentation update and improvements (e.g. widget
          dependencies)
    * bugfixes
        - qtile binary: don't fail if we can't set the locale
        - don't print help if qtile-cmd function returns nothing
        - Monad layout: fix margins when flipped

Qtile 0.14.2, released 2019-06-19:
    * bugfixes
        - previous release still exhibited same issues with package data,
          really fix it this time

Qtile 0.14.1, released 2019-06-19:
    * bugfixes
        - properly include png files in the package data to install included
          icons

Qtile 0.14.0, released 2019-06-19:
    !!! Python version breakage !!!
        - Python 2 is no longer supported
        - Python 3.4 and older is no longer supported
    !!! Config breakage !!!
        - Many internal things were renamed from camel case to snake case. If
          your config uses main(), or any lazy.function() invocations that
          interact directly with the qtile object, you may need to forward port
          them. Also note that we do *not* consider the qtile object to be a
          stable api, so you will need to continue forward porting these things
          for future refactorings (for wayland, etc.). A better approach may be
          to add an upstream API for what you want to do ;)
        - Maildir's subFolder and maildirPath changed to maildir_path and
          sub_folder.
        - the graph widget requires the psutil library to be installed
    * features
        - add custom `change_command` to backlight widget
        - add CommandSet extension to list available commands
        - simplify battery monitoring widget interface and add freebsd
          compatible battery widget implementation
        - track last known mouse coordinates on the qtile manager
        - allow configuration of warping behavior in columns layout
    * bugfixes
        - with cursor warp enabled, the cursor is warped on screen change
        - fix stepping groups to skip the scratch pad group
        - fix stack layout to properly shuffle
        - silence errors when unmapping windows

Qtile 0.13.0, released 2018-12-23:
    !!! deprecation warning !!!
        - wmii layout is deprecated in terms of columns layout, which has the
          same behavior with different defaults, see the wmii definition for
          more details
    * features
        - add svg handling for images
        - allow addgroup command to set the layout
        - add command to get current log level
        - allow groupbox to hide unused groups
        - add caps lock indicator widget
        - add custom_command to check_update widget
    * bugfixes
        - better shutdown handling
        - fix clientlist current client tracking
        - fix typo in up command on ratiotile layout
        - various fixes to check_update widget
        - fix 0 case for resize screen

Qtile 0.12.0, released 2018-07-20:
    !!! Config breakage !!!
        - Tile layout commands up/down/shuffle_up/shuffle_down changed to be
          more consistent with other layouts
        - move qcmd to qtile-cmd because of conflict with renameutils, move
          dqcmd to dqtile-cmd for symmetry
    * features
        - add `add_after_last` option to Tile layout to add windows to the end
          of the list.
        - add new formatting options to TaskList
        - allow Volume to open app on right click
    * bugfixes
        - fix floating of file transfer windows and java drop-downs
        - fix exception when calling `cmd_next` and `cmd_previous` on layout
          without windows
        - fix caps lock affected behaviour of key bindings
        - re-create cache dir if it is deleted while qtile is running
        - fix CheckUpdates widget color when no updates
        - handle cases where BAT_DIR does not exist
        - fix the wallpaper widget when using `wallpaper_command`
        - fix Tile layout order to not reverse on reset
        - fix calling `focus_previous/next` with no windows
        - fix floating bug is BSP layout

Qtile 0.11.1, released 2018-03-01:
    * bug fix
        - fixed pip install of qtile

Qtile 0.11.0, released 2018-02-28:
    !!! Completely changed extension configuration, see the documentation !!!
    !!! `extention` subpackage renamed to `extension` !!!
    !!! `extentions` configuration variable changed to `extension_defaults` !!!
    * features
        - qshell improvements
        - new MonadWide layout
        - new Bsp layout
        - new pomodoro widget
        - new stock ticker widget
        - new `client_name_updated` hook
        - new RunCommand and J4DmenuDesktop extension
        - task list expands to fill space, configurable via `spacing` parameter
        - add group.focus_by_name() and group.info_by_name()
        - add disk usage ratio to df widget
        - allow displayed group name to differ from group name
        - enable custom TaskList icon size
        - add qcmd and dqcmd to extend functionality around qtile.command
          functionality
        - add ScratchPad group that has configurable drop downs
    * bugfixes
        - fix race condition in Window.fullscreen
        - fix for string formatting in qtile_top
        - fix unicode literal in tasklist
        - move mpris2 initialization out of constructor
        - fix wlan widget variable naming and division
        - normalize behavior of layouts on various commands
        - add better fallback to default config
        - update btc widget to use coinbase
        - fix cursor warp when using default layout implementation
        - don't crash when using widget with unmet dependencies
        - fix floating window default location

Qtile 0.10.7, released 2017-02-14:
    * features
        - new MPD widget, widget.MPD2, based on `mpd2` library
        - add option to ignore duplicates in prompt widget
        - add additional margin options to GroupBox widget
        - add option to ignore mouse wheel to GroupBox widget
        - add `watts` formatting string option to Battery widgets
        - add volume commands to Volume widget
        - add Window.focus command
    * bugfixes
        - place transient windows in the middle of their parents
        - fix TreeTab layout
        - fix CurrentLayoutIcon in Python 3
        - fix xcb handling for xcffib 0.5.0
        - fix bug in Screen.resize
        - fix Qtile.display_kb command

Qtile 0.10.6, released 2016-05-24:
    !!! qsh renamed to qshell !!!
        This avoids name collision with other packages
    * features
        - Test framework changed to pytest
        - Add `startup_complete` hook
    * bugfixes
        - Restore dynamic groups on restart
        - Correct placement of transient_for windows
        - Major bug fixes with floating window handling
    * file path changes (XDG Base Directory specification)
        - the default log file path changed from ~/.qtile.log to
          ~/.local/share/qtile/qtile.log
        - the cache directory changed from ~/.cache to ~/.cache/qtile
        - the prompt widget's history file changed from ~/.qtile_history to
          ~/.cache/qtile/prompt_history

Qtile 0.10.5, released 2016-03-06:
    !!! Python 3.2 support dropped !!!
    !!! GoogleCalendar widget dropped for KhalCalendar widget !!!
    !!! qtile-session script removed in favor of qtile script !!!
    * features
        - new Columns layout, composed of dynamic and configurable columns of
          windows
        - new iPython kernel for qsh, called iqsh, see docs for installing
        - new qsh command `display_kb` to show current key binding
        - add json interface to IPC server
        - add commands for resizing MonadTall main panel
        - wlan widget shows when you are disconnected and uses a configurable
          format
    * bugfixes
        - fix path handling in PromptWidget
        - fix KeyboardLayout widget cycling keyboard
        - properly guard against setting screen to too large screen index

Qtile 0.10.4, released 2016-01-19:
    !!! Config breakage !!!
        - positional arguments to Slice layout removed, now `side` and `width`
          must be passed in as keyword arguments
    * features
        - add alt coin support to BitcoinTracker widget
    * bugfixes
        - don't use six.moves assignment (fix for >=setuptools-19.3)
        - improved floating and fullscreen handling
        - support empty or non-charging secondary battery in BatteryWidget
        - fix GoogleCalendar widget crash

Qtile 0.10.3, released 2015-12-25:
    * features
        - add wmii layout
        - add BSD support to graph widgets
    * bugfixes
        - fix (some) fullscreen problems
        - update google calendar widget to latest google api
        - improve multiple keyboard layout support
        - fix displaying Systray widget on secondary monitor
        - fix spawn file descriptor handling in Python 3
        - remove duplicate assert code in test_verticaltile.py
        - allow padding_{x,y} and margin_{x,y} widget attrs to be set to 0

Qtile 0.10.2, released 2015-10-19:
    * features
        - add qtile-top memory monitoring
        - GroupBox can set visible groups
        - new GroupBox highlighting, line
        - allow window state to be hidden on WindowName widget
        - cmd_togroup can move to current group when None sent
        - added MOC playback widget
        - added memory usage widget
        - log truncation, max log size, and number of log backups configurable
        - add a command to change to specific layout index
          (lazy.to_layout_index(index))
    * bugfixes
        - fixed memory leak in dgroups
        - margin fixes for MonalTall layout
        - improved cursor warp
        - remove deprecated imp for Python >= 3.3
        - properly close file for NetGraph
        - fix MondadTall layout grow/shrink secondary panes for Python 2
        - Clock widget uses datetime.now() rather than .fromtimestamp()
        - fix Python 3 compatibility of ThermalSensor widget
        - various Systray fixes, including implementing XEMBED protocol
        - print exception to log during loading config
        - fixed xmonad layout margins between main and secondary panes
        - clear last window name from group widgets when closed
        - add toggleable window border to single xmonad layout
    * config breakage
        - layouts.VerticalTile `windows` is now `clients`
        - layouts.VerticalTile focus_next/focus_previous now take a single
          argument, similar to other layouts

Qtile 0.10.1, released 2015-07-08:
    This release fixes a problem that made the PyPI package uninstallable,
    qtile will work with a pip install now

Qtile 0.10.0, released 2015-07-07:
    !!! Config breakage !!!
        - various deprecated commands have been removed:
            Screen.cmd_nextgroup: use cmd_next_group
            Screen.cmd_prevgroup: use cmd_prev_group
            Qtile.cmd_nextlayout: use cmd_next_layout
            Qtile.cmd_prevlayout: use cmd_prev_layout
            Qtile.cmd_to_next_screen: use cmd_next_screen
            Qtile.cmd_to_prev_screen: use cmd_prev_screen
        - Clock widget: remove fmt kwarg, use format kwarg
        - GmailChecker widget: remove settings parameter
        - Maildir widget: remove maildirPath, subFolders, and separator kwargs
    * Dependency updates
        - cffi>=1.1 is now required, along with xcffib>=0.3 and cairocffi>=0.7
          (the cffi 1.0 compatible versions of each)
        - Care must be taken that xcffib is installed *before* cairocffi
    * features
        - add support for themed cursors using xcb-cursor if available
        - add CheckUpdate widget, for checking package updates, this deprecates
          the Pacman widget
        - add KeyboardKbdd widget, for changing keyboard layouts
        - add Cmus widget, for showing song playing in cmus
        - add Wallpaper widget, for showing and cycling wallpaper
        - add EzConfig classes allowing shortcuts to define key bindings
        - allow GroupBox urgent highlighting through text
        - Bar can be placed vertically on sides of screens (widgets must be
          adapted for vertical viewing)
        - add recognizing brightness keys
    * bugfixes
        - deprecation warnings were not printing to logs, this has been fixed
        - fix calculation of y property of Gap
        - fix focus after closing floating windows and floating windows
        - fix various Python 3 related int/float problems
        - remember screen focus across restarts
        - handle length 1 list passed to Drawer.set_source_rgb without raising
          divide by zero error
        - properly close files opened in Graph widget
        - handle _NET_WM_STATE_DEMANDS_ATTENTION as setting urgency
        - fix get_wm_transient_for, request WINDOW, not ATOM

Qtile 0.9.1, released 2015-02-13:
    This is primarily a unicode bugfix release for 0.9.0; there were several
    nits related to the python2/3 unicode conversion that were simply wrong.
    This release also adds license headers to each file, which is necessary for
    distro maintainers to package Qtile.
    * bugfixes
        - fix python2's importing of gobject
        - fix unicode handling in several places

Qtile 0.9.0, released 2015-01-20:
    * !!! Dependency Changes !!!
      New dependencies will need to be installed for Qtile to work
        - drop xpyb for xcffib (XCB bindings)
        - drop py2cairo for cairocffi (Cairo bindings)
        - drop PyGTK for asyncio (event loop, pangocairo bindings managed
          internally)
        - Qtile still depends on gobject if you want to use anything that uses
          dbus (e.g. the mpris widgets or the libnotify widget)
    * features
        - add Python 3 and pypy support (made possible by dependency changes)
        - new layout for vertical monitors
        - add startup_once hook, which is called exactly once per session (i.e.
          it is not called when qtile is restarted via lazy.restart()). This
          eliminates the need for the execute_once() function found in lots of
          user configs.
        - add a command for showing/hiding the bar (lazy.hide_show_bar())
        - warn when a widget's dependencies cannot be imported
        - make qtile.log more useful via better warnings in general, including
          deprecation and various other warnings that were previously
          nonexistent
        - new text-polling widget super classes, which enable easy
          implementation of various widgets that need to poll things outside
          the event loop.
        - add man pages
        - large documentation update, widget/layout documentation is now
          autogenerated from the docstrings
        - new ImapWidget for checking imap mailboxes
    * bugfixes
        - change default wmname to "LG3D" (this prevents some java apps from
          not working out of the box)
        - all code passes flake8
        - default log level is now WARNING
        - all widgets now use our config framework
        - windows with the "About" role float by default
        - got rid of a bunch of unnecessary bare except: clauses

Qtile 0.8.0, released 2014-08-18:
    * features
        - massive widget/layout documentation update
        - new widget debuginfo for use in Qtile development
        - stack has new autosplit, fair options
        - matrix, ratiotile, stack, xmonad, zoomy get 'margin' option
        - new launchbar widget
        - support for matching WM_CLASS and pid in Match
        - add support for adding dgroups rules dynamically and via ipc
        - Clock supports non-system timezones
        - new mpris2 widget
        - volume widget can use emoji instead of numbers
        - add an 'eval' function to qsh at every object level
        - bar gradients support more colors
        - new Clipboard widget (very handy!)
    * bugfixes
        - bitcoin ticker widget switched from MtGox (dead) to btc-e
        - all widgets now use Qtile's defaults system, so their defaults are
          settable globally, etc.
        - fix behavior when screens are cloned
        - all widgets use a unified polling framework
        - "dialog" WM_TYPEs float by default
        - respect xrandr --primary
        - use a consistent font size in the default config
        - default config supports mouse movements and floating
        - fix a bug where the bar was not redrawn correctly in some multiscreen
          environments
        - add travis-ci support and make tests vastly more robust
    * config breakage
        - libqtile.layout.Stack's `stacks` parameter is now `num_stacks`

Qtile 0.7.0, released 2014-03-30:
    * features
        - new disk free percentage widget
        - new widget to display static image
        - per core CPU graphs
        - add "screen affinity" in dynamic groups
        - volume widget changes volume linear-ly instead of log-ly
        - only draw bar when idle, vastly reducing the number of bar draws and
          speeding things up
        - new Gmail widget
        - Tile now supports automatically managing master windows via the
          `master_match` parameter.
        - include support for minimum height, width, size increment hints
    * bugfixes
        - don't crash on any exception in main loop
        - don't crash on exceptions in hooks
        - fix a ZeroDivisionError in CPU graph
        - remove a lot of duplicate and unused code
        - Steam windows are placed more correctly
        - Fixed several crashes in qsh
        - performance improvements for some layouts
        - keyboard layout widget behaves better with multiple keyboard
          configurations
    * config breakage
        - Tile's shuffleMatch is renamed to resetMaster

Qtile 0.6, released 2013-05-11:
    !!! Config breakage !!!
    This release breaks your config file in several ways:
        - The Textbox widget no longer takes a ``name'' positional parameter,
          since it was redundant; you can use the ``name'' kwarg to define it.
        - manager.Group (now _Group) is not used to configure groups any more;
          config.Group replaces it. For simple configurations (i.e.
          Group("a") type configs), this should be a drop in replacement.
          config.Group also provides many more options for showing and hiding
          groups, assigning windows to groups by default, etc.
        - The Key, Screen, Drag, and Click objects have moved from the manager
          module to the config module.
        - The Match object has moved from the dgroups module to the config
          module.
        - The addgroup hook now takes two parameters: the qtile object and the
          name of the group added:
              @hook.subscribe
              def addgroup_hook(qtile, name):
                  pass
        - The nextgroup and prevgroup commands are now on Screen instead of
          Group.
    For most people, you should be able to just:
        sed -i -e 's/libqtile.manager/libqtile.config' config.py
    ...dgroups users will need to go to a bit more work, but hopefully
    configuration will be much simpler now for new users.
    * features
        - New widgets: task list,
        - New layout: Matrix
        - Added ability to drag and drop groups on GroupBox
        - added "next urgent window" command
        - added font shadowing on widgets
        - maildir widget supports multiple folders
        - new config option log_level to set logging level (any of
          logging.{DEBUG, INFO, WARNING, ERROR, CRITICAL})
        - add option to battery widget to hide while level is above a certain
          amount
        - vastly simplify configuration of dynamic groups
        - MPD widget now supports lots of metadata options
    * bugfixes
        - don't crash on restart when the config has errors
        - save layout and selected group state on restart
        - varous EWMH properties implemented correctly
        - fix non-black systray icon backgrounds
        - drastically reduce the number of timeout_add calls in most widgets
        - restart on RandR attach events to allow for new screens
        - log level defaults to ERROR
        - default config options are no longer initialized when users define
          their corresponding option (preventing duplicate widgets, etc.)
        - don't try to load config in qsh (not used)
        - fix font alignment across Textbox based widgets

Qtile 0.5, released 2012-11-11:
    (Note, this is not complete! Many, many changes have gone in to 0.5, by a
    large number of contributors. Thanks to everyone who reported a bug or
    fixed one!)
    * features
        - Test framework is now nose
        - Documentation is now in sphinx
        - Several install guides for various OSes
        - New widgets: battery based icon, MPRIS1, canto, current layout, yahoo
          weather, sensors, screen brightness, notifiy, pacman, windowtabs,
          she, crashme, wifi.
        - Several improvements to old widgets (e.g. battery widget displays low
          battery in red, GroupBox now has a better indication of which screen
          has focus in multi-screen setups, improvements to Prompt, etc.)
        - Desktop notification service.
        - More sane way to handle configuration files
        - Promote dgroups to a first class entity in libqtile
        - Allow layouts to be named on an instance level, so you can:
            layouts = [
                # a layout just for gimp
                layout.Slice('left', 192, name='gimp', role='gimp-toolbox',
                    fallback=layout.Slice('right', 256, role='gimp-dock',
                    fallback=layout.Stack(stacks=1, **border_args)))
            ]
            ...

            dynamic_groups = { 'gimp': {'layout': 'gimp'} }

            Dgroups(..., dynamic_groups, ...)
        - New Layout: Zoomy
        - Add a session manager to re-exec qtile if things go south
        - Support for WM_TAKE_FOCUS protocol
        - Basic .desktop file for support in login managers
        - Qsh reconnects after qtile is restarted from within it
        - Textbox supports pango markup
        - Examples moved to qtile-examples repository.

    * bugfixes
        - Fix several classes of X races in a more sane way
        - Minor typo fixes to most widgets
        - Fix several crashes when drawing systray icons too early
        - Create directories for qtile socket as necessary
        - PEP8 formatting updates (though we're not totally there yet)
        - All unit tests pass
        - Lots of bugfixes to MonadTall
        - Create IPC socket directory if necessary
        - Better error if two widgets have STRETCH length
        - Autofloat window classes can now be overridden
        - xkeysyms updated

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