Provided by: larswm_7.5.3-6_amd64 
NAME
larswm - Tiling Window Manager for X
SYNOPSIS
larswm [ -display dpy ] [ -f file ] [ -defaults ] [ -v ]
DESCRIPTION
larswm is a tiling window manager for X11, based on 9wm by David Hogan. It provides
virtual desktops, support for tiled and untiled windows, keyboard shortcuts and more,
while using very little system resources. Please see http://larswm.fnurt.net for more
information.
OPTIONS
The following command line options are supported:
-display dpy lets you specify which display you want larswm to manage.
-f file lets you specify a preferences file other than $HOME/.larswmrc to use
for configuration.
-defaults prints to standard out a complete resource file for larswm containing
all options and their defaults.
-v prints the current version on standard error, then exits.
FILES
$HOME/.larswmrc /etc/X11/larswmrc
these two files are looked for in the above order when larswm starts up.
The Idea
When I started working on larswm I had a few ideas that I think are important in a window
manager. They are as follows:
1. The user should not have to spend alot of time arranging windows on the screen, leaving
more time for the actual work that he or she is trying to accomplish.
2. Direct manipulation. Instead of accessing windows and desktops through representations
of these, access them directly. That means: No icons when a window is iconified. No
graphical map of the virtual desktops, larswm is fast enough that it is easier to browse
the actual desktops instead, something that is very quick and easy to do, especially if
you have a wheel mouse, and since the windows are tiled, you usually do not need much time
looking at a desktop to know what is on it. And within one desktop, tiling is a good
example of direct manipulation, a common way to deal with multiple windows on the screen
is to overlap them and select which one you want my clicking on a representation in the
form of a button on a task bar, however, larswm does not need that because the actual
window, with enough content visible to know which one it is, is always visible.
3. No precision clicking. Use the edges of the monitor to make it easy to aim with the
mouse pointer.
4. It must be predictable. If the user ever wonders how focus ended up on a window that he
or she did not click on, something is wrong. larswm has alot of code that deals with
figuring out where focus should go when different events occur.
5. It must have a solid feel to it. Part of this is speed, when you switch desktops or
windows are moved around as the result of being tiled it must go quick, and part of it is
predictability.
6. The window manager should not use more system resources (CPU time, virtual memory) than
is absolutely necessary for performing the task of managing windows. The GUI is minimal,
providing borders around the windows, and a status bar at the bottom of the screen. It
provides all feedback using plain text on the status bar.
7. Quality control. It has been tested with Electric Fence to catch memory access errors
and profiled with gprof. So far I have been able to fix everything that I found with these
tools, but I am no CS major and I am sure some things could be done better. Nevertheless,
it works, and during normal circumstances it works using minimal system resources.
Terminology
Some of this is unique to larswm and some is borrowed from other GUI designs.
Screen
Physical monitor. By default larswm will use up to 4 monitors. This can be adjusted in the
dat.h file.
Virtual Desktop
Each screen is logically divided into up to 16 workspaces. A window is usually only
visible on one of these workspaces.
Subdesktop
Each virtual desktop is then logically divided between two subdesktops. First we have
normal, untiled, windows. They are managed in a way similar to most other window managers.
Second we the tiled subdesktop, where no window is allowed to overlap another. Switching
between the tiled and the untiled set of windows is very fast with a hotkey or mouse
click.
Track
On the tiled subdesktop, windows are laid out in one of two tracks. By default, the ratio
is 60%/40% for left/right track. The ratio can be changed dynamically through hotkeys, and
a different default can be set in the .larswmrc file. The left track always contains one
window filling it from top to bottom while the right track contains any other windows,
evenly sized. There are hotkeys to make any window in the right track expand and move to
the left track while the window that was in the left track is shrunk and placed at the top
of the right track.
Status Bar
The status bar fills two functions. First off, as the name implies, it shows status
messages. This includes the window title of the focused window, the selected virtual
desktop, flags that shows what modes are set on the current virtual desktop and a user
defined message that is used by the sample clock app to show the current date and time.
Second, it is a very big button that can be clicked to perform various functions. It is
easy to target, since you just move the mouse down against the bottom of the screen, no
need to precision aim for it.
Tool
A special kind of window that belongs to the untiled subdesktop, but is still tiled
around. It is also visible on all virtual desktops. Used for things like clocks and load
meters.
Select Zoom
Maximize a window so that the height/width ratio is the same as for a US letter sized
paper, and centering it on the screen. Besides wanting to tile windows, this was the most
common manual move/resize operation I used before it was automated.
Put Aside
All this means is that a window is moved mostly off screen, leaving just a portion
visible. It is another way to do iconification.
A Sample Session
The following assumes you are using the sample.xsession and sample.larswm config files.
After logging in, you will see a mostly empty desktop. Along the bottom of the screen is
the status bar, and in the lower right corner are three smaller windows (xload, xbiff and
xclock) which in the default config are tagged as tool windows. What this means is they
should be visible on all virtual desktops, and should not be covered by windows that are
placed automatically on the tiled subdesktop.
Working with tiled windows
Now hit Shift-Control-Return. This will bring up a new terminal window. Notice how it
occupies the left 60% of the screen. Type something in this window and hit Shift-Control-
Return again. The first window is moved to the right side and shrunk, while the new xterm
occupies the bigger area to the left. Notice that the toolwindows (xload, xbiff and
xclock) are not overlapped.
Hit Shift-Control-Return once more and notice how the two previous windows now both are on
the right side and using half the space each.
Now hit Control-Button1 on the first window you opened, it should be the xterm right above
the tool windows on the right side. This will put that window in the left track, while
putting the left track window at the top of the right track.
That is all there is to never having to manually line up your xterms again!
Working with untiled windows
For demonstration purposes, we can use xlogo. By default, the xlogo window class is not
set to be tiled, so it will be opened on the untiled subdesktop, separate from all the
xterms. In the focused xterm, type xlogo and hit Return. The xlogo window should appear in
the middle of the screen above the tiled windows. If you need to switch between tiled and
untiled windows, you can use Shift-Control-BackSpace. Hit that key twice and see how
xlogo is first hidden behind the tiled xterms and then brought to the front again. If you
had more untiled windows open, they would all have been lowered and raised together.
Moving windows to predefined areas
You can move untiled windows to 9 different predefined locations on the screen with only
one keystroke. With the xlogo window focused, hit Shift-Control-KP_6. The xlogo window
should be against the right edge of the screen, halfway between the top and bottom, just
like 6 on the numeric keypad is among the keys 1 through 9. Hit Shift-Control and each
number on the numeric keypad to see the locations. When done, leave the window on the
right edge in the middle (Shift-Control-KP_6).
Select zooming
With the xlogo window focused and off to the side of the screen, hit Shift-Control-space.
Notice how it is centered and sized to make it easy to work with. When you hit Shift-
Control-space again, it is returned to its former place and size. This can be used as an
alternative to tiling, if you have some windows you would like to mostly manage yourself,
but want a quick way to concentrate on one of them.
Set aside windows
Sometimes when working on the untiled desktop you just want to set a window aside for a
moment. Hit Control-Alt-space to move a window sideways off the right edge of the screen,
leaving just a small portion visible. Clicking on the visible part will put that window
back where it was. If you hit Control-Alt-space with no untiled window focused, the last
put aside window will be brought back. See the mouse reference section for more ways to
manipulate windows in this fashion.
Using the mouse to move and resize windows
With the xlogo window unzoomed and focused, move the mouse down onto the status bar,
anywhere will do, and hold down Shift-Alt-Button1. The mousepointer moved to the top left
corner of the window and you are able to move the window around by moving the mouse. To
place the window, let go of the mouse button. Move xlogo to somewhere near the top left of
the screen.
Next, with the mouse on the status bar, hold down Shift-Control-Alt-Button1. The mouse
pointer is moved to the bottom right corner of the xlogo window and when you move the
mouse, you resize the window. To set the size, let go of the mouse button.
Moving a window between subdesktops
Make sure the xlogo window is focused and then hit Shift+Alt+space. The xlogo should now
be tiled and focused in the left track. If you hit Shift+Alt+space once more, it becomes
untiled again and the other tiled windows moves to fill the vacated spot in the left
track.
Working with virtual desktops
So far, we have only used the first desktop. The way to switch between desktops is easy.
Shift-Control-Left and Shift-Control-Right on the keyboard will move you back and forth
between the desktops. Hit Shift-Control-Right four times. Notice how the status bar label
changes to show what desktop is active. By default there are four virtual desktops per
screen, so you should be back to the first desktop now.
If you instead use Shift-Alt-Left or Shift-Alt-Right you will move to the new virtual
desktop while dragging the currently focused window with you.
Using the mouse wheel
With larswm, the mouse wheel can be used for quite a few operations. The most common is to
switch virtual desktop. This can be done by moving the pointer to the status bar and
rolling the wheel up and down.
You can also use the mouse wheel to move and resize windows quickly. With xlogo focused,
move the pointer to the status bar and hold down Shift-Alt while rolling the wheel to move
the window sideways. If you hold down Shift-Control-Alt you move the window up and down,
and with Shift-Control you can grow and shrink the window.
If you have more than one window open, hold down Shift while rolling the wheel down to
cycle focus through each window. To try it now, shift to the tiled subdesktop by clicking
on any of the tiled xterms then move the mouse pointer to the status bar, hold down shift
and roll the wheel.
This is not exactly intuitive, but very fast once you learn the combinations of Shift,
Control and Alt keys to do these things.
Status Bar Menu System
The status bar is used for a simple menu system. With the pointer on the status bar, hold
down Control and click Button1 and Button3, or roll the wheel up and down, to scroll
between the menu entries. Control-Button2 selects the current menu entry, usually
toggling a desktop or window setting.
If you instead of Control hold down Alt, you can scroll through the list of iconified
windows, and Alt-Button2 uniconifies the selected window.
Things You Can Configure
You can affect alot (but not all!) of the behaviour of larswm by making your own .larswmrc
file and putting it in your home directory.
Default setup
Included in the distribution files is a file called sample.larswmrc that you can use as a
starting point for your own config.
Complete list of config keywords
Another way to get a default .larswmrc is to run larswm with the -defaults flag. It will
print out all the possible options with their defaults filled in, all you have to do is
uncomment and edit any lines you wish to change. Rather than reproduce that here, you can
create your own up to date version by running the command larswm -defaults and piping it
to a file.
Keyboard commands for all windows and subdesktops
┌──────────────┬───────────┬──────────────────────────────────┐
│Shift-Control │ Prior │ Prev Screen │
├──────────────┼───────────┼──────────────────────────────────┤
│Shift-Control │ Next │ Next Screen │
├──────────────┼───────────┼──────────────────────────────────┤
│Shift-Control │ Left │ Prev Desktop │
├──────────────┼───────────┼──────────────────────────────────┤
│Shift-Alt │ Left │ Prev Desktop Drag Focused Window │
├──────────────┼───────────┼──────────────────────────────────┤
│Shift-Control │ Right │ Next Desktop │
├──────────────┼───────────┼──────────────────────────────────┤
│Shift-Alt │ Right │ Next Desktop Drag Focused Window │
├──────────────┼───────────┼──────────────────────────────────┤
│Shift-Control │ F1-F12 │ Jump to desktop 1-12 │
├──────────────┼───────────┼──────────────────────────────────┤
│Shift-Control │ BackSpace │ Toggle Subdesktop │
├──────────────┼───────────┼──────────────────────────────────┤
│Shift-Control │ Up │ Prev Window │
├──────────────┼───────────┼──────────────────────────────────┤
│Shift-Control │ Down │ Next Window │
├──────────────┼───────────┼──────────────────────────────────┤
│Control-Alt │ z │ Hide Window │
├──────────────┼───────────┼──────────────────────────────────┤
│Control-Alt │ x │ Unhide last hidden window │
├──────────────┼───────────┼──────────────────────────────────┤
│Control-Alt │ w │ Close Window │
├──────────────┼───────────┼──────────────────────────────────┤
│Shift-Alt │ space │ Move window to other subdesktop │
└──────────────┴───────────┴──────────────────────────────────┘
Keyboard commands for untiled windows
┌──────────────────┬───────────┬──────────────────────────────┐
│Shift-Control │ space │ Select Zoom │
├──────────────────┼───────────┼──────────────────────────────┤
│Control-Alt │ space │ Put/restore aside window │
├──────────────────┼───────────┼──────────────────────────────┤
│Shift-Control │ 0 │ Put aside all other windows │
├──────────────────┼───────────┼──────────────────────────────┤
│Shift-Control │ KP_Home │ Move window to top left │
├──────────────────┼───────────┼──────────────────────────────┤
│Shift-Control │ KP_Up │ Move window to top center │
├──────────────────┼───────────┼──────────────────────────────┤
│Shift-Control │ KP_Prior │ Move window to top right │
├──────────────────┼───────────┼──────────────────────────────┤
│Shift-Control │ KP_Left │ Move window to left center │
├──────────────────┼───────────┼──────────────────────────────┤
│Shift-Control │ KP_Begin │ Center window │
├──────────────────┼───────────┼──────────────────────────────┤
│Shift-Control │ KP_Right │ Move window to right center │
├──────────────────┼───────────┼──────────────────────────────┤
│Shift-Control │ KP_End │ Move window to bottom left │
├──────────────────┼───────────┼──────────────────────────────┤
│Shift-Control │ KP_Down │ Move window to bottom center │
├──────────────────┼───────────┼──────────────────────────────┤
│Shift-Control │ KP_Next │ Move window to bottom right │
├──────────────────┼───────────┼──────────────────────────────┤
│Shift-Alt │ KP_Up │ Move window up │
├──────────────────┼───────────┼──────────────────────────────┤
│Shift-Alt │ KP_Down │ Move window down │
├──────────────────┼───────────┼──────────────────────────────┤
│Shift-Alt │ KP_Left │ Move window left │
├──────────────────┼───────────┼──────────────────────────────┤
│Shift-Alt │ KP_Right │ Move window right │
├──────────────────┼───────────┼──────────────────────────────┤
│Shift-Control-Alt │ KP_Up │ Grow window vertically │
├──────────────────┼───────────┼──────────────────────────────┤
│Shift-Control-Alt │ KP_Down │ Shrink window vertically │
├──────────────────┼───────────┼──────────────────────────────┤
│Shift-Control-Alt │ KP_Left │ Shrink window horizontally │
├──────────────────┼───────────┼──────────────────────────────┤
│Shift-Control-Alt │ KP_Right │ Grow window horizontally │
├──────────────────┼───────────┼──────────────────────────────┤
│Shift-Control-Alt │ KP_Home │ Grow window both ways │
├──────────────────┼───────────┼──────────────────────────────┤
│Shift-Control-Alt │ KP_End │ Shrink window both ways │
├──────────────────┼───────────┼──────────────────────────────┤
│Shift-Alt │ KP_Insert │ Toggle move/resize increment │
├──────────────────┼───────────┼──────────────────────────────┤
│Shift-Alt │ KP_Home │ Maximize window vertically │
├──────────────────┼───────────┼──────────────────────────────┤
│Shift-Alt │ KP_End │ Maximize window horizontally │
├──────────────────┼───────────┼──────────────────────────────┤
│Shift-Alt │ KP_Begin │ Maximize window │
├──────────────────┼───────────┼──────────────────────────────┤
│Shift-Control-Alt │ KP_Begin │ Full screen │
└──────────────────┴───────────┴──────────────────────────────┘
Keyboard commands for tiled windows
┌──────────────────┬──────────┬────────────────────────────────┐
│Shift-Control-Alt │ KP_Up │ Maximize left track │
├──────────────────┼──────────┼────────────────────────────────┤
│Shift-Control-Alt │ KP_Down │ Restore left track │
├──────────────────┼──────────┼────────────────────────────────┤
│Shift-Control-Alt │ KP_Left │ Shrink left track │
├──────────────────┼──────────┼────────────────────────────────┤
│Shift-Control-Alt │ KP_Right │ Grow left track │
├──────────────────┼──────────┼────────────────────────────────┤
│Shift-Alt │ KP_Begin │ Move window to/from left track │
├──────────────────┼──────────┼────────────────────────────────┤
│Control-Alt │ space │ Restore aside window │
└──────────────────┴──────────┴────────────────────────────────┘
Mouse buttons on the status bar
┌──────────────────┬───────────────┬───────────────────┬─────────────────┐
│ Modifier │ Button1 │ Button2 │ Button3 │
├──────────────────┼───────────────┼───────────────────┼─────────────────┤
│None │ Prev Desktop │ Subdesktop │ Next Desktop │
├──────────────────┼───────────────┼───────────────────┼─────────────────┤
│Control │ Prev Menu │ Select Menu │ Next Menu │
├──────────────────┼───────────────┼───────────────────┼─────────────────┤
│Alt │ Prev Hidden │ Hide/Unhide │ Next Hidden │
├──────────────────┼───────────────┼───────────────────┼─────────────────┤
│Shift-Control │ Shrink │ Select Zoom │ Grow │
├──────────────────┼───────────────┼───────────────────┼─────────────────┤
│Shift-Alt │ Move Window │ │ │
├──────────────────┼───────────────┼───────────────────┼─────────────────┤
│Shift-Control-Alt │ Resize Window │ Lower Window │ Maximize Window │
├──────────────────┼───────────────┼───────────────────┼─────────────────┤
│Control-Alt │ Restore Aside │ Put/Restore Aside │ Put Aside │
└──────────────────┴───────────────┴───────────────────┴─────────────────┘
Mouse wheel on the status bar
┌──────────────────┬───────────────┬──────────────┐
│ Modifier │ Roll Up │ Roll Down │
├──────────────────┼───────────────┼──────────────┤
│None │ Prev Desktop │ Next Desktop │
├──────────────────┼───────────────┼──────────────┤
│Shift │ Prev Window │ Next Window │
├──────────────────┼───────────────┼──────────────┤
│Control │ Prev Menu │ Next Menu │
├──────────────────┼───────────────┼──────────────┤
│Alt │ Prev Hidden │ Next Hidden │
├──────────────────┼───────────────┼──────────────┤
│Shift-Control │ Shrink │ Grow │
├──────────────────┼───────────────┼──────────────┤
│Shift-Alt │ Move Up │ Move Down │
├──────────────────┼───────────────┼──────────────┤
│Shift-Control-Alt │ Move Left │ Move Right │
├──────────────────┼───────────────┼──────────────┤
│Control-Alt │ Restore Aside │ Put Aside │
└──────────────────┴───────────────┴──────────────┘
Clicking on unfocused windows
Button1 is used to focus windows.
If skip_focus is on (this is the default) you can force a tiled window into the left track
by Control-Button1 clicking.
If skip_focus is off, then Control-Button1 clicking will prevent moving the newly focused
window to the left track.
If you Control-Button1 click on a window that is not on the active subdesktop, you will
switch focus without also switching subdesktop.
If you Control-Button1 click on an aside window, that window will be put back while all
other untiled windows are put aside.
Indexed resources
In the sample.larswmrc, all the entries that end in a number are indexed resources. The
number can be between 0 and 63, and must be unique within each resource type.
Multi-head
When specifying an option that only affects one of the virtual desktops, you can also
limit it to a specific monitor. For instance, larswm.0.0.dtname: One would name the first
virtual desktop on the first monitor only. Due to precedence, you can set an option for
all desktops one way, and then specific desktops another. The ways to specify screens and
desktops are, listed in order of precedence:
┌────────────────────┬────────────────────────────────┐
│ Format │ Affected desktops/screens │
├────────────────────┼────────────────────────────────┤
│larswm.S.D.resource │ Only desktop D on screen S │
├────────────────────┼────────────────────────────────┤
│larswm.S.?.resource │ All desktops on screen S │
├────────────────────┼────────────────────────────────┤
│larswm.?.D.resource │ Only desktop D on all screens. │
├────────────────────┼────────────────────────────────┤
│larswm.?.?.resource │ All desktops on all screens. │
├────────────────────┼────────────────────────────────┤
│larswm*resource │ All desktops on all screens. │
└────────────────────┴────────────────────────────────┘
As an example, if you want all desktops except the first on the second monitor to not
resize windows that are tiled, you would put the following lines in your .larswmrc:
larswm*tile_resize: false
larswm.1.0.tile_resize: true
The first line is needed because the default is to resize windows.
The Status Bar
The thin window across the bottom of the screen is the status bar. On the left is the
window title of the focused window, and on the right is a status area.
Mode flags
Between the virtual desktop label and the user defined message (date/time in the default
setup) is a block of flags in upper case [TCRSBH]. They indicate the following:
T Subdesktop
T for tiled or U for untiled.
C Clickthru
Whether clicks on an unfocused window should focus and pass the click on to the client, or
just focus and discard the click. C means pass to client.
R Tile Resizing
Whether tiled windows are resized or not. R means they are resized. If not, they are just
stacked in the right track, each having the top left corner visible.
S Skip Focus
Whether giving focus to a window in the right track makes it jump to the left track. S
means no, you have to Control-Button1 click it to make it jump. If off, you can Control-
Button1 click to make a window stay in place while getting focus.
B Big Move/Resize
Whether the keyboard and mouse wheel commands to move and resize windows should work a
pixel at a time, or 5% of the screen width/height at a time.
H Hidden Windows
Whether any windows are hidden (iconified) on any screens. It is there so you will not
forget about them, since larswm has no visual representation of iconified windows.
Window mode flags
The status bar will also show the class of the focused window and instance in the format
(Class~Instance). Just to the right of that is another set of flags in lower case [nftsz]
that mean:
n Notile
Window belongs to the untiled subdesktop.
f Floating
Window always stays on top of non-floating windows.
t Tool
Window is tiled around, not over.
s Sticky
Window is visible on all virtual desktops.
z Zoomed
Window is in one of the zoomed states.
User defined message
If you want, you can put any message you like in the right most portion of the status bar.
This can be used for things like clocks, email notifiers, stock tickers etc. Included in
the distribution is a small example of a clock called larsclock. It is started by the
default session script.
If you do not run larsclock, you can set the message from any shell script with the
command larsremote message TEXT, which would show TEXT on the status bar.
Window Types
Here is a more detailed look at the different types larswm can associate with a window.
Transient windows
Windows that have the WM_TRANSIENT_FOR property set are put on the untiled subdesktop even
if the window class has been specified as tiled.
When a transient window first gets mapped, it will always show up, no matter what desktop
you are viewing. The transient window will be assigned to the desktop where the parent
window is though, so as soon as you change desktop, it will only show up on the virtual
desktop the parent belongs to.
Untiled windows
Any window that is not tiled is assigned to the untiled subdesktop. These windows are
completely separate from the tiled subdesktop. The untiled subdesktop behaves more or less
like any traditional window manager, but adds a few keyboard shortcuts for moving windows
to different parts of the screen or zooming them in both dimensions.
larswm will not tile a window unless its class/instance can be found in the
larswm.dotileclass list.
The way to move between your tiled and untiled desktop is through a keyboard shortcut,
which by default is Shift-Control-BackSpace
When a window is mapped on the untiled subdesktop for the first time, it is centered on
the screen, unless it has had its desired position set in the hints.
Floating windows
Floating windows will always stay on top of other non-floating windows, regardless of
which subdesktop is active. This can be used for small windows, like xcalc, that you
always want accessible. If clickthru is on, clicks will be passed on to floating windows
regardless of which subdesktop was active before the click.
Sticky windows
Sticky windows are windows of a class and instance that matches an entry in the
larswm.stickyclass list. They are always visible no matter which virtual desktop you are
on.
Tools
Tools are windows you always want visible. Examples of tools are xclock, xload and other
small informational windows. When a window has been identified as a tool window, it will
be assigned to the untiled desktop, it will be sticky and the tiled windows will not cover
it. Also, if clickthru is on, any clicks on tool windows will be passed on to the client,
regardless of which subdesktop was active before the click. Tools will never end up
focused unless you click on them.
Internals
A little more detail about how larswm does things.
Every time a window is mapped or unmapped, or (if skip_focus is off) you focus a new
window on the tiled subdesktop by clicking on it the following process is executed:
1. The width of the two tracks are calculated. This is by default set up so the left track
uses 60% of the screen width, but it can be configured in the .larswmrc file.
2. It calculates how many windows should be in each track, one in the left track and the
rest in the right.
3. The height of each window in each track is calculated.
4. It goes through the list of all windows and places them in the designated spot.
5. After this it returns to the event loop.
That is pretty much it. If skip_focus is off (default is on), when you click on an
inactive window in the right track, it will pop over into the left track, and the window
that were there will pop over to the top of the right track.
At all times, the right track will contain tiled windows in the order that they were in
the left track, starting with most recent.
Associating windows with a virtual desktop
You can associate certain window classes/instances to a certain virtual desktop number by
adding resources to your .larswmrc.
An example of how to associate all Netscape windows with the second virtual desktop:
larswm.dtclass.0: Netscape
larswm.dtnum.0: 1
When any Netscape window opens, larswm will first switch to the specified desktop, then
map the window.
Hidden windows
larswm iconifies windows by hiding them. To unhide a hidden window, you must first locate
its label using the status bar. Please see the section about using menus on the status bar
for information on how this works.
You can also unhide the last hidden window with one keystroke, Control-Alt-x.
Focus handling
To change focus to a window, you just left click on it, and if skip_focus is off that
window will pop into the left track, and the window currently there will pop over to the
top of the right track.
If you have it set up to automatically put the focused window in the left track, you might
still sometimes want to type something into one of the tiled windows without rearranging
all the windows, and to do that you Control-Button1 click on a window. Focus will change,
but all windows will stay where they are. This will also prevent any transient windows
owned by the application from immediately be raised and get focus.
If you have it in the default mode, where selecting a new window to have focus does not
make it pop into the left track you can do that by Control-Button1 clicking it.
Clickthru
When you click on a window to give it focus, that click is also passed on to the client.
This makes it easier to work with a multi-window application. You can turn this feature
off, in which case the click used to focus a window is never seen by the application.
Multi-Head
When a window gets mapped, for whatever reason, it is usually given focus. But if the
MapRequest event occurs on a different screen than the one you are working on, things
could get confusing. I solved this by adding the following rules to how focus is assigned
when windows open and close:
1. If the currently focused window is on the same screen, then the new window will get
focus.
2. If the currently focused window is on a different screen, the new window will get focus
only if the mouse pointer is on the same screen as the new window.
3. If no window is focused, a newly mapped window will get focus only if the mouse pointer
is on the same screen as the new window.
4. If the focused window closes, focus will revert to another window, usually the window
that was focused before the one that just closed. Focus will revert only if the mouse
pointer is on the same screen as the window that closed.
I believe these rules will help eliminate most cases of having your keystrokes go to a
window you did not intend it to.
Atoms
The following atoms are created and monitored by larswm and can be used in third party
tools:
LARSWM_EXIT
Tells larswm to exit.
LARSWM_RESTART
Tells larswm to restart, reloading the .larswmrc file.
LARSWM_BARTEXT
When this is updated, the content of this atom is shown as text on the status bar until
the atom is updated again. See larsclock and larsremote for examples of how to use this.
Compatibility
Terminal Windows
xterm windows might look like they are not redrawing correctly, but they are in fact. It
is up to the program running inside it to detect window size changes and redraw the screen
as necessary. One way to deal with this is to run screen inside the xterm, as it will
handle resizing and redrawing correctly.
On some, mostly older, systems you need to make terminal windows know that they have been
resized when they are first opened and tiled.
Put this line in your .cshrc or .bashrc:
eval `resize`
It will ensure that it is set to the correct number of rows and columns when it is opened.
Size Hints
The PResizeInc and PMaxSize hints are honored. PMinSize is not, as it might have problems
fitting all the windows in when tiling them.
Resizing Windows
For windows that do not cope well with being resized, you can disable automatic resizing
on a particular desktop, making the windows in the right track be stacked on top of
eachother instead. This can also be used for windows that resize slowly, like Netscape, to
speed things up considerably.
Multi-Head Displays
It does work well with multi-head displays. One of my development systems is a dual-head
Sun running Solaris 9, so this functionality has been tested quite alot. It currently
behaves in a predictable manner when you switch focus between screens, move between
desktops etc.
GTK Applications
Some GTK apps do not set WM_TRANSIENT_FOR correctly on their dialog boxes, and they also
sometimes have a different class string on those subwindows, making things confused. The
best way to deal with those kinds of problems is to specify both the class and instance of
the top level windows you do want tiled. In some cases, this still does not work, like in
some builds of Mozilla where every window it creates has class/instance Mozilla-
bin/mozilla-bin.
Standards Compliance
At this time there is no GNOME/KDE/Motif/whatever compatibility. It follows the ICCCM as
much as it can while still providing all the automatic functionality that it does.
LICENSE
Many thanks to David Hogan for writing 9wm and releasing it under such a license that I
could use it as a base to build larswm on.
Here is the original license for 9wm:
---
9wm is free software, and is Copyright (c) 1994-1996 by David Hogan. Permission is
granted to all sentient beings to use this software, to make copies of it, and to
distribute those copies, provided that:
(1) the copyright and licence notices are left intact
(2) the recipients are aware that it is free software
(3) any unapproved changes in functionality are either
(i) only distributed as patches
or (ii) distributed as a new program which is not called 9wm and whose documentation gives
credit where it is due
(4) the author is not held responsible for any defects or shortcomings in the software, or
damages caused by it.
There is no warranty for this software. Have a nice day.
---
Please consider my code to be under the same type of license as 9wm, inserting my name
where appropriate.
SEE ALSO
larsclock(1x), larsmenu(1x), larsremote(1x)
AUTHORS
larswm was created by Lars Bernhardsson <lab@fnurt.net> by building on 9wm by David Hogan.
larswm(1x)