.\" t # I don't know this stuff, sorry. -Jarl .\" @(#)FvwmButtons.1 1/28/94 .TH FvwmButtons 1 "Mar 9 1996" .UC .SH NAME FvwmButtons \- the FVWM buttonbox module .SH SYNOPSIS FvwmButtons is spawned by fvwm, so no command line invocation will work. .SH DESCRIPTION The FvwmButtons module provides a window of buttons which sits on the X terminal's root window. The user can press the buttons at any time, and trigger invocation of a user-specified command by the window manager. FvwmButtons only works when fvwm is used as the window manager. The buttonbox can be of any configuration or geometry, and can have monochrome or color icons to represent the actions which would be invoked. .SH INITIALIZATION During initialization, \fIFvwmButtons\fP will search for a configuration file which describes the buttonbox geometry, color, icons, and actions. The format of this files will be described later. The configuration file will be the one which fvwm used during its initialization. To use FvwmButtons with several different configurations, you can invoke FvwmButtons with an optional parameter, which it will use as its name instead (e.g "Module FvwmButtons SomeButtons"). SomeButtons will then read only the lines in the configuration file starting with "*SomeButtons", and not the lines belonging to FvwmButtons. You can also specify an optional configuration file to use instead of the default fvwm configuration file, by giving a second argument which is a filename. This will override the setting "*FvwmButtonsFile", see below. .SH INVOCATION FvwmButtons can be invoked by inserting the line 'Module FvwmButtons' in the .fvwmrc file. This should be placed in the InitFunction if FvwmButtons is to be spawned during fvwm's initialization, or can be bound to a menu or mouse button or keystroke to invoke it later. Fvwm will search directory specified in the ModulePath configuration option to attempt to locate FvwmButtons. .SH CONFIGURATION OPTIONS The following options int the .fvwmrc file are understood by FvwmButtons: .IP "*FvwmButtonsBack \fIcolor\fP" Specifies the background color for the buttons. A relief and a shadow color will also be calculated from this. .IP "*FvwmButtonsColumns \fIcolumns\fP" Specifies the number of columns of buttons to be created. If unspecified, the number of columns will be set to the number of buttons requested, divided by the number of rows. If both the rows and columns are specified, but do not specify as many buttons as are defined, then the users columns specification will be ignored. .IP "*FvwmButtonsFile \fIfilename\fP" Specifies that the configuration for this button is found in the file \fIfilename\fP, which will have to be given with full pathname, or is assumed to be in fvwm's startup directory. The configuration file is in the same format as fvwm's configuration file, but each line is read as if prefixed by "*FvwmButtons". Comments are given by starting a line with "#", line continuation is done by ending a line with a "\\". .IP "*FvwmButtonsFont \fIfont\fP" Specifies the font to be used for labeling the buttons, or \fINone\fP. .IP "*FvwmButtonsFore \fIcolor\fP" Specifies the color used for button label text and monochrome icons. .IP "*FvwmButtonsFrame \fIwidth\fP" Specifies the width of the relief around each button. If this is given as a negative number, the relief will at all times be the inverse of the normal relief. In effect, you will get a sunken button, which is raised when activated. .IP "*FvwmButtonsGeometry \fIgeometry\fP" Specifies the FvwmButtons window location. The size should not be specified, as FvwmButtons automatically chooses a size which gracefully accomodates all its buttons. The geometry is a standard X11 window geometry specification. .IP "*FvwmButtonsPadding \fIwidth height\fP" The amount of free space between the relief of the button and its contents is normally 2 pixels to the sides and 4 pixels above and below, except for swallowed windows and containers, which are not padded at all, unless given specific orders. This setting specifies the default horizontal padding to be \fIwidth\fP pixels, and the vertical padding to be \fIheight\fP pixels. .IP "*FvwmButtonsRows \fIrows\fP" Specifies the number of rows of buttons to be created. If unspecified, 2 rows will be used. .IP "*FvwmButtons(\fIoptions\fP) [\fItitle icon command\fP]" Specifies the contents of a button in the buttonbox. The following \fIoptions\fP, separated by commas or whitespace, can be given a button: .IP " \fIwidth\fPx\fIheight\fP" The button will be \fIwidth\fP times the normal button width and \fIheight\fP times the normal button height. .IP " Action [(\fIoptions\fP)] \fIcommand\fP" Specifies an fvwm command to be executed when the button is activated by pressing return or a mouse button. If \fIcommand\fP contains whitespace it must be quoted. The current options are: Mouse \fIn\fP - this action is only executed for mouse button \fIn\fP. One actions can be defined for each mouse button, in addition to the general action. .IP " Back \fIcolor\fP" Specifies the background color to be used drawing this box. A relief color and a shadow color will also be calculated from this. .IP " Container [(\fIoptions\fP)]" Specifies that this button will contain a miniature buttonbox, more or less equivalent to swallowing another FvwmButtons module. The options are the same as can be given for a single button, but they affect all the contained buttons. Options available for this use are \fIBack, Font, Fore, Frame\fP and \fIPadding\fP. Flags for Title and Swallow options can be set with \fITitle(flags)\fP and \fISwallow(flags\fP. You should also specify either "Columns \fIwidth\fP" or "Rows \fIheight\fP", or "Rows 2" will be assumed for purpose of arranging the buttons inside the container. For an example, see the \fISample configuration\fP section. The container button itself (separate from the contents) can take format options like \fIFrame\fP and \fIPadding\fP, and commands can be bound to it. This means you can make a sensitive relief around a container, like *FvwmButtons(2x2, Frame 5, Padding 2 2, Action Beep,\\ Container(Frame 1)) Typically you will want to at least give the container a size setting \fIwidth\fPx\fIheight\fP. .IP " End" Specifies that no more buttons are defined for the current container, and further buttons will be put in the container's parent. This option should be given on a line by itself, i.e *FvwmButtons(End) .IP " Font \fIfontname\fP" Specifies that the font \fIfontname\fP is to be used for labeling this button. .IP " Fore \fIcolor\fP" Specifies a color of the title and monochrome icons in this button. .IP " Frame \fIwidth\fP" The relief of the button will be \fIwidth\fP pixels wide. If \fIwidth\fP is given as a negative number, the relief will at all times be the inverse of the normal relief. In effect, you will get a sunken button, which is raised when activated. .IP " Icon \fIfilename\fP" The name of an X11 bitmap file or XPM color icon file, containing the icon to display on the button. FvwmButtons will search through the path specified in the fvwm IconPath or PixmapPath configuration items to find the icon file. .IP " NoSize" This option specifies that this button will not be considered at all when making the initial calculations of buttonsizes. Useful for the odd button that gets just a couple of pixels to large to keep in line, and therefor blows up your whole buttonbox. "NoSize" is equivalent to "Size 0 0". .IP " Padding \fIwidth height\fP" The amount of free space between the relief of the button and its contents is normally 2 pixels to the sides and 4 pixels above and below, except for swallowed windows and containers, which are by default not padded at all. This option sets the horizontal padding to \fIwidth\fP and the vertical padding to \fIheight\fP. .IP " Size \fIwidth height\fP" Specifies that the contents of this button will require \fIwidth\fP by \fIheight\fP pixels, regardless of what size FvwmButtons calculates from the icon and the title. A buttonbar with only swallowed windows will not get very large without this option specified, as FvwmButtons does not consider sizes for swallowing buttons. Note that this option gives the minimum space assured; other buttons might require the buttonbox to use larger sizes. .IP " Swallow [(\fIflags\fP)] \fIhangon\fP \fIcommand\fP" Causes FvwmButtons to execute \fIcommand\fP, and when a window matching the name \fIhangon\fP appears, it is captured and swallowed into this button. An example: *FvwmButtons(Swallow XClock 'Exec xclock &') will take the first window whose name, class or resource is "XClock" and display it in the button. Modules can be swallowed by specifying the module instead of 'Exec whatever', like: *FvwmButtons(Swallow "FvwmPager" "FvwmPager 0 0") The flags that can be given to swallow are: NoClose / Close - Specifies whether the swallowed program in this button will be unswallowed or closed when FvwmButtons exit cleanly. "NoClose" can be combined with "UseOld" to have windows survive restart of windowmanager. The default setting is "Close". NoHints / Hints - Specifies whether hints from the swallowed program in this button will be ignored or not, useful in forcing a window to resize itself to fit its button. The default value is "Hints". NoKill / Kill - Specifies whether the swallowed program will be closed by killing it or by sending a message to it. This can be useful in ending programs that doesn't accept window manager protocol. The default value is "NoKill". This has no effect if "NoClose" is specified. NoRespawn / Respawn - Specifies whether the swallowed program is to be respawn if it dies. If "Respawn" is specified, the program will be respawned using the original \fIcommand\fP. Use this option with care, the program might have a very legitimate reason to die. NoOld / UseOld - Specifies whether the button will try to swallow an existing window matching the \fIhangon\fP name before spawning one itself with \fIcommand\fP. The default value is "NoOld". "UseOld" can be combined with "NoKill" to have windows survive restart of windowmanager. If you want FvwmButtons to swallow an old window, and not spawn one itself if failing, let the \fIcommand\fP be "Nop": *FvwmButtons(Swallow (UseOld) "Console" Nop) If you want to be able to start it yourself, combine it with an action: *FvwmButtons(Swallow (UseOld) "Console" Nop, \\ Action `Exec "Console" console &`) NoTitle / UseTitle - Specifies whether the title of the button will be taken from the swallowed window's title or not. If "UseTitle" is given, the title on the button will change dynamically to reflect the window name. The default is "NoTitle". .IP " Title [(\fIoptions\fP)] \fIname\fP" Specifies the title which will be written on the button. Whitespace can be included in the title by quoting it. If a title at any time is to long for its buttons, characters are chopped of one at a time until it fits. If \fIjustify\fP is "Right", the head is removed, otherwise its tail is removed. These \fIoptions\fP can be given to Title: Center - The title will be centered horizontally. This is the default. Left - The title will be justified to the left side. Right - The title will be justified to the right side. Side - This will cause the title to appear on the right hand side of any icon or swallowed window, instead of below it which is the default. If you use small icons, and combine this with the "Left" option, you can get a look similar to fvwm's menus. .IP "Legacy fields [\fItitle icon command\fP]" These fields are kept for compatibility with previous versions of FvwmButtons, and their use is discouraged. The \fItitle\fP field is similar to the option Title \fIname\fP. If the title field is "-", no title will be displayed. The \fIicon\fP field is similar to the option Icon \fIfilename\fP. If the icon field is "-" no icon will be displayed. The \fIcommand\fP field is similar to the option Action \fIcommand\fP or alternatively Swallow "\fIhangon\fP" \fIcommand\fP. .IP "The \fIcommand\fP" Any fvwm command is recognized by FvwmButtons. See fvwm(1) for more info on this. The Exec command has a small extension when used in Actions, its syntax is here: Exec ["hangon"] command When FvwmButtons finds such an Exec command, the button will remain pushed in until a window whose name or class matches the qouted portion of the command is encountered. This is intended to provide visual feedback to the user that the action he has requested will be performed. If the qouted portion contains no characters, then the button will pop out immediately. Note that users can continue pressing the button, and re-executing the command, even when it looks "pressed in." .IP "Quoting" Any string which contains whitespace must be quoted. This include commands. Quoting can be done with any of the three quotation characters; single quote: 'This is a "quote"', double quote: "It's another `quote'", and backquote: `This is a strange quote`. The backquoting is purposeful if you use a preprocessor like FvwmCpp and want it to get into your commands, like this: #define BG gray60 *FvwmButtons(Swallow "xload" `Exec xload -bg BG &`) .SH ARRANGEMENT ALGORITHM FvwmButtons tries to arrange its buttons as best it can, by using recursively, on each container including the buttonbox itself, the following algorithm. .IP "Getting the size right" First it calculates the number of button unit areas it will need, by adding the width times the height in buttons of each button. Containers are for the moment considered a normal button. Then it considers the given \fIrows\fP and \fIcolumns\fP arguments. If the number of rows is given, it will calculate how many columns are needed, and stick to that, unless \fIcolumns\fP is larger, in which case you will get some empty space at the bottom of the buttonbox. If the number of columns is given, it calculates how many rows it needs to fit all the buttons. If neither is given, it assumes you want two rows, and finds the number of columns from that. .IP "Shuffling buttons" Now it has a large enough area to place the buttons in, all that is left is to place them right. The algorithm assumes the buttons are all of unit size, and places them in a left to right, top to bottom western fashion. Then it looks at button 1, and considers: Is this button larger than normal? If it isn't, the same thing is done for the next buttons. When a button is found that is larger than 1x1, space must be provided for it. The algorithm assumes it is in the right coordinate, its upper left corner should be unchanged. It then "slides" away the buttons that occupies the places needed for this button. The buttons are slid to the right, wrapping around to the next line. When all the space has been cleared for this button the algorithm continues with the next button, doing the same. .IP "Containers" Containers are arranged by the same algorithm, in fact they are shuffled recursively as the algorithm finds them. .IP "Clarifying example" An example might be useful here: Suppose you have 6 buttons, all unit sized except number two, which is 2x2. This makes for 5 times 1 plus 1 times 4 equals 9 unit buttons total area. Assume you have requested 3 columns. .nf .sp 1) +---+---+---+ 2) +---+---+---+ 3) +---+---+---+ | 1 | 2 | 3 | | 1 | 2 | | | 1 | 2 | | +---+---+---+ +---+---+---+ +---+---+---+ | 4 | 5 | 6 | | 3 | 4 | 5 | | 3 | | 4 | +---+---+---+ +---+---+---+ +---+---+---+ | | | 6 | | | 5 | 6 | | +-----------+ +---+-------+ +---+---+---+ 4) +---+---+---+ 5) +---+-------+ | 1 | 2 | | | 1 | | +---+---+---+ +---+ 2 | | 3 | | | | 3 | | +---+---+---+ +---+---+---+ | 4 | 5 | 6 | | 4 | 5 | 6 | +---+---+---+ +---+---+---+ .sp .fi The algorithm starts as in figure 1. The first large button it finds is number 2, and it will try to free up each of the unit areas it occupies, in a left to right, top to bottom order. First it sees that button 3 is in its way, and it shifts all the buttons, giving figure 2. Now it finds that button 4 is in the way, so button 4 to 6 are shifted, yielding figure 3. Button 4 is still barring progress, so it shifts button 4 to 6 once more, ending up at figure 4. Now all the button units required by button 2 are freed, and button 2 can be given its real size. .IP "What size will the buttons be?" When FvwmButtons has read the icons and fonts that are required by its configuration, it can find out which size is needed for every non-swallowing button. The unit button size of a container is set to be large enough to hold the largest button in it without squeezing it. Swallowed windows are simple expected to be comfortable with the buttonsize they get from this scheme. If a particular configuration requires more space for a swallowed window, it can be set in that button's configuration line using the option "Size \fIwidth height\fP". This will tell FvwmButtons to give this button at least \fIwidth\fP by \fIheight\fP pixels inside the relief and padding. .SH SAMPLE CONFIGURATION The following are excepts from a .fvwmrc file which describe FvwmButtons initialization commands: .nf .sp ########################################################## # Load any modules which should be started during fvwm # initialization ModulePath /usr/lib/X11/fvwm:/usr/bin/X11 # Make sure FvwmButtons is always there. AddToFunc InitFunction "I" Module FvwmButtons AddToFunc RestartFunction "I" Module FvwmButtons # Make it titlebar-less, sticky, and give it an icon Style "FvwmButtons" Icon toolbox.xpm, NoTitle, Sticky ########################################################## *FvwmButtonsFore Black *FvwmButtonsBack rgb:90/80/90 *FvwmButtonsGeometry -135-5 *FvwmButtonsRows 1 *FvwmButtonsFont -*-helvetica-medium-r-*-*-12-* *FvwmButtonsPadding 2 2 *FvwmButtons(Title Resize,Icon resize.xpm ,Action Resize) *FvwmButtons(Title Move ,Icon arrows2.xpm,Action Move ) *FvwmButtons(Title Lower ,Icon Down ,Action Lower ) *FvwmButtons(Title Raise ,Icon Up ,Action Raise ) *FvwmButtons(Title Kill ,Icon bomb.xpm ,Action Destroy) *FvwmButtons(1x1,Container(Rows 3,Frame 1)) *FvwmButtons(Title Dopey ,Action \\ `Exec "big_win" xterm -T big_win -geometry 80x50 &`) *FvwmButtons(Title Snoopy, Font fixed, Action \\ `Exec "small_win" xterm -T small_win &`) *FvwmButtons(Title Smokin') *FvwmButtons(End) *FvwmButtons(Title Xcalc, Icon rcalc.xpm,\\ Action `Exec "Calculator" xcalc &`) *FvwmButtons(Title XMag, Icon magnifying_glass2.xpm,\\ Action `Exec "xmag" xmag &`) *FvwmButtons(Title Mail, Icon mail2.xpm,\\ Action `Exec "xmh" xmh &`) *FvwmButtons(4x1, Swallow "FvwmPager" `FvwmPager 0 3`\\ Frame 3) *FvwmButtons(Swallow(UseOld,NoKill) "xload15" `Exec xload\\ -title xload15 -nolabel -bg rgb:90/80/90 -update 15 &`) .sp .fi The last lines are a little tricky - one spawns an FvwmPager module, and captures it to display in a quadruple width button. is used, the Pager will be as big as possible within the button's relief. The final line is even more magic. Note the combination of \fIUseOld\fP and \fINoKill\fP, which will try to swallow an existing window with the name "xload15" when starting up (if failing: starting one with the specified command), which is unswallowed when ending FvwmButtons. The color specification \fIrgb:90/80/90\fP is actually the most correct way of specifying independent colors in X, and should be used instead of the older \fI#908090\fP. If the latter specification is used in your configuration file, you should be sure to escape the hash in any of the \fIcommand\fPs which will be executed, or fvwm will consider the rest of the line a comment. .SH COPYRIGHTS The FvwmButtons program, and the concept for interfacing this module to the Window Manager, are all original work by Robert Nation Copyright 1993, Robert Nation. No guarantees or warranties or anything are provided or implied in any way whatsoever. Use this program at your own risk. Permission to use this program for any purpose is given, as long as the copyright is kept intact. Further modifications and patching by Jarl Totland, copyright 1996. The statement above still applies. .SH AUTHOR Robert Nation. Somewhat enhanced by Jarl Totland.