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-.\" $Id: dialog.3,v 1.42 2008/07/28 00:01:05 tom Exp $
-.\" Copyright 2005-2007,2008 Thomas E. Dickey
-.\"
-.\" This program is free software; you can redistribute it and/or modify
-.\" it under the terms of the GNU Lesser General Public License, version 2.1
-.\" as published by the Free Software Foundation.
-.\"
-.\" This program is distributed in the hope that it will be useful, but
-.\" WITHOUT ANY WARRANTY; without even the implied warranty of
-.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-.\" Lesser General Public License for more details.
-.\"
-.\" You should have received a copy of the GNU Lesser General Public
-.\" License along with this program; if not, write to
-.\" Free Software Foundation, Inc.
-.\" 51 Franklin St., Fifth Floor
-.\" Boston, MA 02110, USA.
-.TH DIALOG 3 "" "$Date: 2008/07/28 00:01:05 $"
-.SH NAME
-dialog \- widgets and utilities for the dialog program
-.SH SYNOPSIS
-.B cc [ flag ... ] file ... -ldialog [ library ... ]
-
-.B #include <dialog.h>
-.PP
-\fBDialog\fP
-is a program that will let you to present a variety of questions or
-display messages using dialog boxes from a shell script.
-It is built from the \fBdialog\fP library,
-which consists of several widgets
-as well as utility functions that are used by the widgets
-or the main program.
-.
-.SH DESCRIPTION
-This manpage documents the features from \fI<dialog.h>\fP which
-are likely to be important to developers using the widgets directly.
-Some hints are also given for developing new widgets.
-.
-.\" ************************************************************************
-.SS DEFINITIONS
-Exit codes (passed back to the main program for its use)
-are defined with a "\fIDLG_EXIT_\fP prefix.
-The defined constants can be mapped using environment variables
-as described in \fBdialog\fP(1),
-e.g., \fIDLG_EXIT_OK\fP corresponds to \fI$DIALOG_OK\fP.
-.PP
-Useful character constants which correspond to user input
-are named with the "\fICHR_\fP" prefix, e.g.,
-\fICHR_BACKSPACE\fP.
-.PP
-Colors and video attributes are categorized and associated with
-settings in the configuration file
-(see the discussion of \fI$DIALOGRC\fP in \fBdialog\fP(1)).
-The \fIDIALOG_ATR(n)\fP macro is used for defining the references
-to the combined color and attribute table \fIdlg_color_table[]\fP.
-.PP
-The \fBdialog\fP application passes its command-line parameters
-to the widget functions. Some of those parameters are single values,
-but some of the widgets accept data as an array of values.
-Those include checklist/radiobox, menubox and formbox.
-When the \fB--item-help\fP option is given, an extra column
-of data is expected.
-The USE_ITEM_HELP(), CHECKBOX_TAGS, MENUBOX_TAGS and FORMBOX_TAGS
-macros are used to hide this difference from the calling application.
-.PP
-Most of the other definitions found in \fI<dialog.h>\fP
-are used for convenience in building the library or main program.
-These include definitions based on the generated \fI<dlg_config.h>\fP header.
-
-.\" ************************************************************************
-.SS DATA STRUCTURES
-All of the global data for the \fBdialog\fP library is stored in
-a few structures: \fIDIALOG_STATE\fP, \fIDIALOG_VARS\fP and \fIDIALOG_COLORS\fP.
-The corresponding \fIdialog_state\fP, \fIdialog_vars\fP and \fIdlg_color_table\fP
-global variables should be initialized to zeros,
-and then populated with the data to use.
-A few of these must be nonzero for the corresponding widgets to function.
-As as the case with function names,
-variables beginning with "\fIdialog_\fP"
-are designed for use by the calling application
-while variables beginning with "\fIdlg_\fP"
-are intended for lower levels, e.g., by the \fBdialog\fP library.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_STATE.all_windows
-This is a linked list of all windows created by the library.
-The \fBdlg_del_window\fP function uses this to locate windows which
-may be redrawn after deleting a window.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_STATE.aspect_ratio
-This corresponds to the command-line option "\fB--aspect-ratio\fP".
-The value gives the application
-some control over the box dimensions when using auto
-sizing (specifying 0 for height and width).
-It represents width / height.
-The default is 9, which means 9 characters wide to every 1 line high.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_STATE.getc_callbacks
-This is setup in \fIui_getc.c\fP to record windows which must be polled
-for input, e.g,. to handle the background tailbox widget.
-One window is designated as the foreground or control window.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_STATE.getc_redirect
-If the control window for \fIDIALOG_STATE.getc_callbacks\fP is
-closed, the list is transferred to this variable.
-Closing all windows causes the application to exit.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_STATE.output
-This is set in the \fBdialog\fP application to the stream on
-which the application and library functions may write text results.
-Normally that is the standard error,
-since the curses library prefers to write its data to the standard output.
-Some scripts, trading portability for convenience,
-prefer to write results to the standard output,
-e.g., by using the "\fB--stdout\fP" option.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_STATE.output_count
-This is incremented by \fIdlg_does_output\fP,
-which is called by each widget that writes text to the output.
-The \fBdialog\fP application uses that to decide if it should
-also write a separator, i.e.,
-\fIDIALOG_STATE.separate_str\fP,
-between calls to each widget.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_STATE.pipe_input
-This is set in \fIinit_dialog\fP to a stream which can be used by the
-\fBgauge\fP widget, which must be the application's standard input.
-The \fBdialog\fP application calls \fIinit_dialog\fP normally with
-\fIinput\fP set to the standard input, but optionally based on the
-"\fB--input-fd\fP" option.
-Since the application cannot read from
-a pipe (standard input) and at the same time read
-the curses input from the standard input,
-it must allow for reopening the latter from either
-a specific file descriptor,
-or directly from the terminal.
-The adjusted pipe stream value is stored in this variable.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_STATE.screen_initialized
-This is set in \fIinit_dialog\fP and
-reset in \fIend_dialog\fP.
-It is used to check if curses has been initialized,
-and if the \fIendwin\fP function must be called on exit.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_STATE.screen_output
-This is set in \fIinit_dialog\fP to the output stream used
-by the curses library.
-Normally that is the standard output,
-unless that happens to not be a terminal (and if \fIinit_dialog\fP can
-successfully open the terminal directly).
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_STATE.separate_str
-This corresponds to the command-line option "\fB--separate-widget\fP".
-The given string
-specifies a string that will separate the output on \fBdialog\fP's output from
-each widget.
-This is used to simplify parsing the result of a dialog with several widgets.
-If this option is not given,
-the default separator string is a tab character.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_STATE.tab_len
-This corresponds to the command-line option "\fB--tab-len\fP \fInumber\fP".
-Specify the number of spaces that a tab character occupies if the
-"\fB--tab-correct\fP"
-option is given.
-The default is 8.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_STATE.use_colors
-This is set in \fIinit_dialog\fP if the curses implementation supports color.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_STATE.use_shadow
-This corresponds to the command-line option "\fB--no-shadow\fP".
-This is set in \fIinit_dialog\fP if the curses implementation supports color.
-If true,
-suppress shadows that would be drawn to the right and bottom of each dialog box.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_STATE.visit_items
-This corresponds to the command-line option "\fB--visit-items\fP".
-.\" ---------------------------------------------------------------------------
-.PP
-The \fBdialog\fP application resets the \fIdialog_vars\fP data before
-accepting options to invoke each widget.
-Most of the \fIDIALOG_VARS\fP members are set directly from \fBdialog\fP's
-command-line options:
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.ascii_lines
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.backtitle
-This corresponds to the command-line option "\fB--backtitle\fP \fIbacktitle\fP".
-It specifies a
-\fIbacktitle\fP
-string to be displayed on the backdrop, at the top of the screen.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.beep_after_signal
-This corresponds to the command-line option "\fB--beep-after\fP".
-If true, beep after a user has completed a widget by pressing one of the buttons.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.beep_signal
-This corresponds to the command-line option "\fB--beep\fP".
-It is obsolete.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.begin_set
-This is true if the command-line option "\fB--begin y x\fP" was used.
-It specifies the position of the upper left corner of a dialog box on the screen.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.begin_x
-This corresponds to the \fIx\fP value from
-the command-line option "\fB--begin\fP \fIy x\fP" (second value).
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.begin_y
-This corresponds to the \fIy\fP value from
-the command-line option "\fB--begin\fP \fIy x\fP" (first value).
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.cancel_label
-This corresponds to the command-line option "\fB--cancel-label\fP \fIstring\fP".
-The given \fIstring\fP overrides the label used for "Cancel" buttons.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.cant_kill
-This corresponds to the command-line option "\fB--no-kill\fP".
-If true, this tells
-\fBdialog\fP
-to put the
-\fBtailboxbg\fP
-box in the background,
-printing its process id to \fBdialog\fP's output.
-SIGHUP is disabled for the background process.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.colors
-This corresponds to the command-line option "\fB--colors\fP".
-If true, interpret embedded "\\Z" sequences in the dialog text
-by the following character,
-which tells dialog to set colors or video attributes:
-0 through 7 are the ANSI codes used in curses:
-black,
-red,
-green,
-yellow,
-blue,
-magenta,
-cyan and
-white respectively.
-Bold is set by 'b', reset by 'B'.
-Reverse is set by 'r', reset by 'R'.
-Underline is set by 'u', reset by 'U'.
-The settings are cumulative, e.g., "\\Zb\\Z1" makes the following text
-bright red.
-Restore normal settings with "\\Zn".
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.column_separator
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.cr_wrap
-This corresponds to the command-line option "\fB--cr-wrap\fP".
-If true,
-interpret embedded newlines in the dialog text as a newline on the screen.
-Otherwise, \fBdialog\fR will only wrap lines where needed to fit inside the text box.
-Even though you can control line breaks with this,
-\fBdialog\fR will still wrap any lines that are too long for the width of the box.
-Without cr-wrap, the layout of your text may be formatted to look nice
-in the source code of your script without affecting the way it will
-look in the dialog.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.default_item
-This corresponds to the command-line option "\fB--default-item\fP \fIstring\fP".
-The given string is used as
-the default item in a checklist, form or menu box.
-Normally the first item in the box is the default.
-.IP \fIDIALOG_VARS.defaultno
-This corresponds to the command-line option "\fB--defaultno\fP".
-If true,
-make the default value of the
-\fByes/no\fP
-box a
-.BR No .
-Likewise, make the default button of widgets that provide "OK" and "Cancel"
-a \fBCancel\fP.
-If \fB--nocancel\fP was given that option overrides this,
-making the default button always "Yes" (internally the same as "OK").
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.dlg_clear_screen
-This corresponds to the command-line option "\fB--clear\fP".
-This option is implemented in the main program, not the library.
-If true,
-the screen will be cleared on exit.
-This may be used alone, without other options.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.exit_label
-This corresponds to the command-line option "\fB--exit-label string\fP".
-The given string overrides the label used for "EXIT" buttons.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.extra_button
-This corresponds to the command-line option "\fB--extra-button\fP".
-If true, some widgets show an extra button,
-between "OK" and "Cancel" buttons.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.extra_label
-This corresponds to the command-line option "\fB--extra-label\fP \fIstring\fP".
-The given string overrides the label used for "Extra" buttons.
-Note: for inputmenu widgets, this defaults to "Rename".
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.formitem_type
-This is set by the command-line option "\fB--passwordform\fP"
-to tell the form widget that its text fields should be treated like
-password widgets.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.help_button
-This corresponds to the command-line option "\fB--help-button\fP".
-If true, some widgets show a help-button after "OK" and "Cancel" buttons,
-i.e., in checklist, radiolist and menu boxes.
-If \fB--item-help\fR is also given, on exit
-the return status will be the same as for the "OK" button,
-and the item-help text will be written to \fBdialog\fP's output after the token "HELP".
-Otherwise, the return status will indicate that the Help button was pressed,
-and no message printed.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.help_label
-This corresponds to the command-line option "\fB--help-label\fP \fIstring\fP".
-The given string overrides the label used for "Help" buttons.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.help_status
-This corresponds to the command-line option "\fB--help-status\fP".
-If true, and the the help-button is selected,
-writes the checklist or radiolist information
-after the item-help "HELP" information.
-This can be used to reconstruct the state of a checklist after processing
-the help request.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.input_length
-This is nonzero if \fIDIALOG_VARS.input_result\fP is allocated,
-versus being a pointer to the user's local variables.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.input_menu
-This flag is set to denote whether the menubox widget
-implements a menu versus a inputmenu widget.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.input_result
-If \fIDIALOG_VARS.input_length\fP is zero,
-this is a pointer to user buffer (on the stack, or static).
-When \fIDIALOG_VARS.input_length\fP is nonzero,
-this is a dynamically-allocated buffer used by the widgets to return
-printable results to the calling application.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.insecure
-This corresponds to the command-line option "\fB--insecure\fP".
-If true, make the password widget friendlier but less secure,
-by echoing asterisks for each character.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.item_help
-This corresponds to the command-line option "\fB--item-help\fP".
-If true,
-interpret the tags data for checklist, radiolist and menu boxes
-adding a column whose text is displayed in the bottom line of the
-screen, for the currently selected item.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.keep_tite
-This is set by the command-line option "\fB--keep-tite\fP"
-to tell \fBdialog\fP to not attempt to cancel the terminal initialization
-(termcap \fIti\fP/\fIte\fP) sequences which correspond to xterm's alternate-screen
-switching.
-Normally \fBdialog\fP does this to avoid flickering when run several times
-in a script.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.keep_window
-This corresponds to the command-line option "\fB--keep-window\fP".
-If true, do not remove/repaint the window on exit.
-This is useful for keeping the window contents visible when several
-widgets are run in the same process.
-Note that curses will clear the screen when starting a new process.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.max_input
-This corresponds to the command-line option "\fB--max-input\fP \fIsize\fP".
-Limit input strings to the given size.
-If not specified, the limit is 2048.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.no_label
-This corresponds to the command-line option "\fB--no-label\fP \fIstring\fP".
-The given string overrides the label used for "No" buttons.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.no_lines
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.nocancel
-This corresponds to the command-line option "\fB--no-cancel\fP".
-If true,
-suppress the "Cancel" button in checklist, inputbox and menu box modes.
-A script can still test if the user pressed the ESC key to cancel to quit.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.nocollapse
-This corresponds to the command-line option "\fB--no-collapse\fP".
-Normally \fBdialog\fR converts tabs to spaces and reduces multiple
-spaces to a single space for text which is displayed in a message boxes, etc.
-It true, that feature is disabled.
-Note that \fBdialog\fR will still wrap text, subject to the \fB--cr-wrap\fR
-option.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.nook
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.ok_label
-This corresponds to the command-line option "\fB--ok-label\fP \fIstring\fP".
-The given string overrides the label used for "OK" buttons.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.print_siz
-This corresponds to the command-line option "\fB--print-size\fP".
-If true,
-each widget prints its size to \fBdialog\fP's output when it is invoked.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.quoted
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.separate_output
-This corresponds to the command-line option "\fB--separate-output\fP".
-If true,
-checklist widgets output result one line at a time, with no quoting.
-This facilitates parsing by another program.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.single_quoted
-This corresponds to the command-line option "\fB--single-quoted\fP".
-If true,
-Use single-quoting as needed (and no quotes if unneeded) for the
-output of checklist's as well as the item-help text.
-If this option is not set, \fBdialog\fP uses double quotes around each item.
-That requires occasional use of backslashes to make the output useful in
-shell scripts.
-.IP \fIDIALOG_VARS.size_err
-This corresponds to the command-line option "\fB--size-err\fP".
-If true,
-check the resulting size of a dialog box before trying to use it,
-printing the resulting size if it is larger than the screen.
-(This option is obsolete, since all new-window calls are checked).
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.sleep_secs
-This corresponds to the command-line option "\fB--sleep\fP \fIsecs\fP".
-This option is implemented in the main program, not the library.
-If nonzero, this is the number of seconds after to delay after processing a dialog box.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.tab_correct
-This corresponds to the command-line option "\fB--tab-correct\fP".
-If true, convert each tab character of the text to one or more spaces.
-Otherwise, tabs are rendered according to the curses library's interpretation.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.timeout_secs
-This corresponds to the command-line option "\fB--timeout\fP \fIsecs\fP".
-If nonzero, timeout input requests (exit with error code)
-if no user response within the given number of seconds.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.title
-This corresponds to the command-line option "\fB--title\fP \fItitle\fP".
-Specifies a
-\fItitle\fP
-string to be displayed at the top of the dialog box.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.trim_whitespace
-This corresponds to the command-line option "\fB--trim\fP".
-If true, eliminate leading blanks,
-trim literal newlines and repeated blanks from message text.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.visit_items
-This corresponds to the command-line option "\fB--visit-items\fP".
-Modify the tab-traversal of checklist, radiobox, menubox and inputmenu
-to include the list of items as one of the states.
-This is useful as a visual aid,
-i.e., the cursor position helps some users.
-.\" ---------------------------------------------------------------------------
-.IP \fIDIALOG_VARS.yes_label
-This corresponds to the command-line option "\fB--yes-label\fP \fIstring\fP".
-The given string overrides the label used for "Yes" buttons.
-.
-.\" ************************************************************************
-.\" ************************************************************************
-.SS WIDGETS
-Functions that implement major functionality for the command-line \fBdialog\fP
-program, e.g., widgets, have names beginning "\fIdialog_\fP".
-
-All dialog boxes have at least three parameters:
-.TP 5
-\fItitle\fP
-the caption for the box, shown on its top border.
-.TP 5
-\fIheight\fP
-the height of the dialog box.
-.TP 5
-\fIwidth\fP
-the width of the dialog box.
-.PP
-Other parameters depend on the box type.
-.
-.\" ************************************************************************
-.IP dialog_calendar
-implements the "\fB--calendar\fP" option.
-.RS
-.IP title
-is the title on the top of the widget.
-.IP subtitle
-is the prompt text shown within the widget.
-.IP height
-is the height excluding the fixed-height calendar grid.
-.IP width
-is the overall width of the box,
-which is adjusted up to the calendar grid's minimum width if needed.
-.IP day
-is the initial day of the week shown,
-counting zero as Sunday.
-If the value is negative,
-the current day of the week is used.
-.IP month
-is the initial month of the year shown,
-counting one as January.
-If the value is negative,
-the current month of the year is used.
-.IP year
-is the initial year shown.
-If the value is negative,
-the current year is used.
-.RE
-.\" ************************************************************************
-.IP dialog_checklist
-implements the "\fB--checklist\fP" and "\fB--radiolist\fP" options
-depending on the \fIflag\fP parameter.
-.RS
-.IP title
-is the title on the top of the widget.
-.IP cprompt
-is the prompt text shown within the widget.
-.IP height
-is the desired height of the box.
-If zero, the height is adjusted to use the available screen size.
-.IP width
-is the desired width of the box.
-If zero, the height is adjusted to use the available screen size.
-.IP list_height
-is the minimum height to reserve for displaying the list.
-If zero, it is computed based on the given \fIheight\fP and \fIwidth\fP.
-.IP item_no
-is the number of rows in \fIitems\fP.
-.IP items
-is an array of strings which is viewed either as a list of rows
-.RS
-\fItag item status \fR
-.RE
-.IP
-or
-.RS
-\fItag item status help\fR
-.RE
-.IP
-depending on whether \fIdialog_vars.item_help\fP is set.
-.IP flag
-is either \fIFLAG_CHECK\fP, for checklists,
-or \fIFLAG_RADIO\fP for radiolists.
-.RE
-.\" ************************************************************************
-.IP dialog_dselect
-implements the "\fB--dselect\fP" option.
-.RS
-.IP title
-is the title on the top of the widget.
-.IP path
-is the preselected value to show in the input-box,
-which is used also to set the directory- and file-windows.
-.IP height
-is the height excluding the minimum needed to show the dialog box framework.
-If zero, the height is based on the screen size.
-.IP width
-is the desired width of the box.
-If zero, the height is based on the screen size.
-.RE
-.\" ************************************************************************
-.IP dialog_editbox
-implements the "\fB--editbox\fP" option.
-.RS
-.IP title
-is the title on the top of the widget.
-.IP file
-is the name of the file from which to read.
-.IP height
-is the desired height of the box.
-If zero, the height is adjusted to use the available screen size.
-.IP width
-is the desired width of the box.
-If zero, the height is adjusted to use the available screen size.
-.RE
-.\" ************************************************************************
-.IP dialog_form
-implements the "\fB--form\fP" option.
-.RS
-.IP title
-is the title on the top of the widget.
-.IP cprompt
-is the prompt text shown within the widget.
-.IP height
-is the desired height of the box.
-If zero, the height is adjusted to use the available screen size.
-.IP width
-is the desired width of the box.
-If zero, the height is adjusted to use the available screen size.
-.IP form_height
-is the minimum height to reserve for displaying the list.
-If zero, it is computed based on the given \fIheight\fP and \fIwidth\fP.
-.IP item_no
-is the number of rows in \fIitems\fP.
-.IP items
-is an array of strings which is viewed either as a list of rows
-.RS
-\fIName NameY NameX Text TextY TextX FLen ILen\fR
-.RE
-.IP
-or
-.RS
-\fIName NameY NameX Text TextY TextX FLen ILen Help\fR
-.RE
-.IP
-depending on whether \fIdialog_vars.item_help\fP is set.
-.RE
-.\" ************************************************************************
-.IP dialog_fselect
-implements the "\fB--fselect\fP" option.
-.RS
-.IP title
-is the title on the top of the widget.
-.IP path
-is the preselected value to show in the input-box,
-which is used also to set the directory- and file-windows.
-.IP height
-is the height excluding the minimum needed to show the dialog box framework.
-If zero, the height is based on the screen size.
-.IP width
-is the desired width of the box.
-If zero, the height is based on the screen size.
-.RE
-.\" ************************************************************************
-.IP dialog_gauge
-implements the "\fB--gauge\fP" option.
-.RS
-.IP title
-is the title on the top of the widget.
-.IP cprompt
-is the prompt text shown within the widget.
-.IP height
-is the desired height of the box.
-If zero, the height is based on the screen size.
-.IP width
-is the desired width of the box.
-If zero, the height is based on the screen size.
-.IP percent
-is the percentage to show in the progress bar.
-.RE
-.\" ************************************************************************
-.IP dialog_inputbox
-implements the "\fB--inputbox\fP" or
-"\fB--password\fP" option, depending on the value of \fIpassword\fP.
-.RS
-.IP title
-is the title on the top of the widget.
-.IP cprompt
-is the prompt text shown within the widget.
-.IP height
-is the desired height of the box.
-If zero, the height is based on the screen size.
-.IP width
-is the desired width of the box.
-If zero, the height is based on the screen size.
-.IP init
-is the initial value of the input box, whose length is taken into account
-when auto-sizing the width of the dialog box.
-.IP password
-if true, causes typed input to be echoed as asterisks.
-.RE
-.\" ************************************************************************
-.IP dialog_menu
-implements the "\fB--menu\fP" or "\fB--inputmenu\fP" option
-depending on whether \fIdialog_vars.input_menu\fP is set.
-.RS
-.IP title
-is the title on the top of the widget.
-.IP cprompt
-is the prompt text shown within the widget.
-.IP height
-is the desired height of the box.
-If zero, the height is based on the screen size.
-.IP width
-is the desired width of the box.
-If zero, the height is based on the screen size.
-.IP menu_height
-is the minimum height to reserve for displaying the list.
-If zero, it is computed based on the given \fIheight\fP and \fIwidth\fP.
-.IP item_no
-is the number of rows in \fIitems\fP.
-.IP items
-is an array of strings which is viewed either as a list of rows
-.RS
-\fItag item\fR
-.RE
-.IP
-or
-.RS
-\fItag item help\fR
-.RE
-.IP
-depending on whether \fIdialog_vars.item_help\fP is set.
-.RE
-.\" ************************************************************************
-.IP dialog_mixedform
-implements the "\fB--mixedform\fP" option.
-.RS
-.IP title
-is the title on the top of the widget.
-.IP cprompt
-is the prompt text shown within the widget.
-.IP height
-is the desired height of the box.
-If zero, the height is adjusted to use the available screen size.
-.IP width
-is the desired width of the box.
-If zero, the height is adjusted to use the available screen size.
-.IP form_height
-is the minimum height to reserve for displaying the list.
-If zero, it is computed based on the given \fIheight\fP and \fIwidth\fP.
-.IP item_no
-is the number of rows in \fIitems\fP.
-.IP items
-is an array of strings which is viewed either as a list of rows
-.RS
-\fIName NameY NameX Text TextY TextX FLen ILen Ityp\fR
-.RE
-.IP
-or
-.RS
-\fIName NameY NameX Text TextY TextX FLen ILen Ityp Help\fR
-.RE
-.IP
-depending on whether \fIdialog_vars.item_help\fP is set.
-.RE
-.\" ************************************************************************
-.IP dialog_mixedgauge
-implements the "\fB--mixedgauge\fP" option
-.RS
-.IP title
-is the title on the top of the widget.
-.IP cprompt
-is the caption text shown within the widget.
-.IP height
-is the desired height of the box.
-If zero, the height is based on the screen size.
-.IP width
-is the desired width of the box.
-If zero, the height is based on the screen size.
-.IP percent
-is the percentage to show in the progress bar.
-.IP item_no
-is the number of rows in \fIitems\fP.
-.IP items
-is an array of strings which is viewed as a list of \fItag\fP and \fIitem\fP values.
-The \fItag\fP values are listed, one per row, in the list at the top of
-the widget.
-.IP
-The \fIitem\fP values are decoded: digits 0-9 are the following strings
-.RS
-.IP 0
-Succeeded
-.IP 1
-Failed
-.IP 2
-Passed
-.IP 3
-Completed
-.IP 4
-Checked
-.IP 5
-Done
-.IP 6
-Skipped
-.IP 7
-In Progress
-.IP 8
-(blank)
-.IP 9
-N/A
-.RE
-.IP
-A string with a leading "-" character is centered, marked with "%".
-For example, "-75" is displayed as "75%".
-Other strings are displayed as is.
-.RE
-.\" ************************************************************************
-.IP dialog_msgbox
-implements the "\fB--msgbox\fP" or "\fB--infobox\fP" option
-depending on whether \fIpauseopt\fP is set.
-.RS
-.IP title
-is the title on the top of the widget.
-.IP cprompt
-is the prompt text shown within the widget.
-.IP height
-is the desired height of the box.
-If zero, the height is based on the screen size.
-.IP width
-is the desired width of the box.
-If zero, the height is based on the screen size.
-.IP pauseopt
-if true, an "OK" button will be shown,
-and the dialog will wait for it to complete.
-With an "OK" button, it is denoted a "msgbox",
-without an "OK" button, it is denoted an "infobox".
-.RE
-.\" ************************************************************************
-.IP dialog_pause
-implements the "\fB--pause\fP" option.
-.RS
-.IP title
-is the title on the top of the widget.
-.IP height
-is the desired height of the box.
-If zero, the height is based on the screen size.
-.IP width
-is the desired width of the box.
-If zero, the height is based on the screen size.
-.IP seconds
-is the timeout to use for the progress bar.
-.RE
-.\" ************************************************************************
-.IP dialog_progressbox
-implements the "\fB--progressbox\fP" option.
-.RS
-.IP title
-is the title on the top of the widget.
-.IP cprompt
-is the prompt text shown within the widget.
-If empty or null, no prompt is shown.
-.IP height
-is the desired height of the box.
-If zero, the height is based on the screen size.
-.IP width
-is the desired width of the box.
-If zero, the height is based on the screen size.
-.RE
-.\" ************************************************************************
-.IP dialog_tailbox
-implements the "\fB--tailbox\fP" or "\fB--tailboxbg\fP" option
-depending on whether \fIbg_task\fP is set.
-.RS
-.IP title
-is the title on the top of the widget.
-.IP file
-is the name of the file to display in the dialog.
-.IP height
-is the desired height of the box.
-If zero, the height is based on the screen size.
-.IP width
-is the desired width of the box.
-If zero, the height is based on the screen size.
-.IP bg_task
-if true,
-the window is added to the callback list in \fIdialog_state\fP,
-and the application will poll for the window to be updated.
-Otherwise an "OK" button is added to the window,
-and it will be closed when the button is activated.
-.RE
-.\" ************************************************************************
-.IP dialog_textbox
-implements the "\fB--textbox\fP" option.
-.RS
-.IP title
-is the title on the top of the widget.
-.IP file
-is the name of the file to display in the dialog.
-.IP height
-is the desired height of the box.
-If zero, the height is based on the screen size.
-.IP width
-is the desired width of the box.
-If zero, the height is based on the screen size.
-.RE
-.\" ************************************************************************
-.IP dialog_timebox
-implements the "\fB--timebox\fP" option.
-.RS
-.IP title
-is the title on the top of the widget.
-.IP subtitle
-is the prompt text shown within the widget.
-.IP height
-is the desired height of the box.
-If zero, the height is based on the screen size.
-.IP width
-is the desired width of the box.
-If zero, the height is based on the screen size.
-.IP hour
-is the initial hour shown.
-If the value is negative,
-the current hour is used.
-.IP minute
-is the initial minute shown.
-If the value is negative,
-the current minute is used.
-.IP second
-is the initial second shown.
-If the value is negative,
-the current second is used.
-.RE
-.\" ************************************************************************
-.IP dialog_yesno
-implements the "\fB--yesno\fP" option.
-.RS
-.IP title
-is the title on the top of the widget.
-.IP cprompt
-is the prompt text shown within the widget.
-.IP height
-is the desired height of the box.
-If zero, the height is based on the screen size.
-.IP width
-is the desired width of the box.
-If zero, the height is based on the screen size.
-.RE
-.
-.\" ************************************************************************
-.SS UTILITY FUNCTIONS
-Most functions that implement lower-level
-functionality for the command-line \fBdialog\fP
-program or widgets, have names beginning "\fIdlg_\fP".
-Bowing to longstanding usage, the functions that initialize the
-display and end it are named \fIinit_dialog\fP and \fIend_dialog\fP.
-.PP
-The only non-widget function whose name begins with "\fIdialog_\fP"
-is \fIdialog_version\fP, which returns the version number of the
-library as a string.
-.
-.PP
-Here is a brief summary of the utility functions and their parameters:
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_add_callback
-Add a callback, used to allow polling input from multiple tailbox
-widgets.
-.RS
-.TP 5
-.B DIALOG_CALLBACK *\fIp\fP
-contains the callback information.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_add_quoted
-Add a quoted string to the result buffer (see \fBdlg_add_result\fP).
-.RS
-.TP 5
-.B char * \fIstring
-is the string to add.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_add_result
-Add a quoted string to the result buffer \fBdialog_vars.input_result\fP.
-.RS
-.TP 5
-.B char * \fIstring
-is the string to add.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_add_separator
-Add an output-separator to the result buffer \fBdialog_vars.input_result\fP.
-If \fBdialog_vars.output_separator\fP is set, use that.
-Otherwise, if \fBdialog_vars.separate_output\fP is set, use newline.
-If neither is set, use a space.
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_add_string
-Add a quoted or unquoted string to the result buffer
-(see \fBdlg_add_quoted\fP) and \fBdlg_add_result\fP),
-according to whether \fBdialog_vars.quoted\fP is true.
-.RS
-.TP 5
-.B char * \fIstring
-is the string to add.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_align_columns
-Copy and reformat an array of pointers to strings, aligning according to
-the column separator \fBdialog_vars.column_separator\fP.
-If no column separator is set, the array will be unmodified;
-otherwise it is copied and reformatted.
-.IP
-Caveat: This function is only implemented for 8-bit characters.
-.RS
-.TP 5
-.B char **\fItarget
-This is the array to reformat.
-It points to the first string to modify.
-.TP 5
-.B int \fIper_row
-This is the size of the struct for each row of the array.
-.TP 5
-.B int \fInum_rows
-This is the number of rows in the array.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_asciibox
-returns its parameter transformed to the
-corresponding "+" or "-", etc. for the line-drawing characters used in \fBdialog\fP.
-If the parameter is not a line-drawing or other special character such as ACS_DARROW, it returns 0.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_attr_clear
-Set window to the given attribute.
-.RS
-.TP 5
-.B WINDOW * \fIwin
-is the window to update.
-.TP 5
-.B int \fIheight
-is the number of rows to update.
-.TP 5
-.B int \fIwidth
-is the number of columns to update.
-.TP 5
-.B chtype \fIattr
-is the attribute, e.g., \fBA_BOLD\fP.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_auto_size
-Automatically size the window used for a widget.
-If the given height or width are zero,
-justify the \fIprompt\fP text and return the actual limits.
-.RS
-.TP 5
-.B const char * \fItitle
-is the title string to display at the top of the widget.
-.TP 5
-.B const char * \fIprompt
-is the message text which will be displayed in the widget,
-used here to determine how large the widget should be.
-.TP 5
-.B int * \fIheight
-is the nominal height.
-.TP 5
-.B int * \fIwidth
-is the nominal width.
-.TP 5
-.B int \fIboxlines
-is the number of lines to reserve in the vertical direction.
-.TP 5
-.B int \fImincols
-is the minimum number of columns to use.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_auto_sizefile
-Like \fBdlg_auto_size\fP, but use a file contents to decide how large
-the widget should be.
-.RS
-.TP 5
-.B const char * \fItitle
-is the title string to display at the top of the widget.
-.TP 5
-.B const char * \fIfile
-is the name of the file.
-.TP 5
-.B int * \fIheight
-is the nominal height.
-If it is -1, use the screen's height after subtracting \fBdialog_vars.begin_y\fP
-if \fBdialog_vars.begin_set\fP is true.
-.TP 5
-.B int \fI*width
-is the nominal width.
-If it is -1, use the screen's width after subtracting \fBdialog_vars.begin_x\fP
-if \fBdialog_vars.begin_set\fP is true.
-.TP 5
-.B int \fIboxlines
-is the number of lines to reserve on the screen for drawing boxes.
-.TP 5
-.B int \fImincols
-is the number of columns to reserve on the screen for drawing boxes.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_beeping
-If \fBdialog_vars.beep_signal\fP is nonzero,
-this calls \fBbeep\fP once and sets
-\fBdialog_vars.beep_signal\fP to zero.
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_boxchar
-returns its parameter transformed as follows:
-.RS
-.TP 3
-.B -
-if neither \fBdialog_vars.ascii_lines\fP nor \fBdialog_vars.no_lines\fP is set.
-.TP 3
-.B -
-if \fBdialog_vars.ascii_lines\fP is set, returns the corresponding "+" or "-", etc. for the line-drawing characters used in \fBdialog\fP.
-.TP 3
-.B -
-otherwise, if \fBdialog_vars.no_lines\fP is set, returns a space for the line-drawing characters.
-.TP 3
-.B -
-if the parameter is not a line-drawing or other special character such as ACS_DARROW, it returns the parameter unchanged.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_box_x_ordinate
-returns a suitable x-ordinate (column) for a new widget.
-If \fBdialog_vars.begin_set\fP is 1,
-use \fBdialog_vars.begin_x\fP;
-otherwise center the widget on the screen (using the \fIwidth\fP parameter).
-.RS
-.TP 5
-.B int \fIwidth
-is the width of the widget.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_box_y_ordinate
-returns a suitable y-ordinate (row) for a new widget.
-If \fBdialog_vars.begin_set\fP is 1,
-use \fBdialog_vars.begin_y\fP;
-otherwise center the widget on the screen (using the \fIheight\fP parameter).
-.RS
-.TP 5
-.B int \fIheight
-is the height of the widget.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_button_count
-Count the buttons in the list.
-.RS
-.TP 5
-.B const char ** \fIlabels
-is a list of (pointers to) button labels terminated by a null pointer.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_button_layout
-Make sure there is enough space for the buttons by
-computing the width required for their labels,
-adding margins and limiting based on the screen size.
-.RS
-.TP 5
-.B const char ** \fIlabels
-is a list of (pointers to) button labels terminated by a null pointer.
-.TP 5
-.B int * \fIlimit
-the function sets the referenced \fIlimit\fP to the width required for
-the widest label (limited by the screen size)
-if that is wider than the passed-in limit.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_button_sizes
-Compute the size of the button array in columns.
-.RS
-.TP 5
-.B const char ** \fIlabels
-is a list of (pointers to) button labels terminated by a null pointer.
-.TP 5
-.B int \fIvertical
-is true if the buttons are arranged in a column rather than a row.
-.TP 5
-.B int * \fIlongest
-Return the total number of columns in the referenced location.
-.TP 5
-.B int * \fIlength
-Return the longest button's columns in the referenced location.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_button_x_step
-Compute the step-size needed between elements of the button array.
-.RS
-.TP 5
-.B const char ** \fIlabels
-is a list of (pointers to) button labels terminated by a null pointer.
-.TP 5
-.B int \fIlimit
-is the maximum number of columns to allow for the buttons.
-.TP 5
-.B int * \fIgap
-store the nominal gap between buttons in the referenced location.
-This is constrained to be at least one.
-.TP 5
-.B int * \fImargin
-store the left+right total margins (for the list of buttons) in the referenced
-location.
-.TP 5
-.B int * \fIstep
-store the step-size in the referenced location.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_button_to_char
-Find the first uppercase character in the label, which we may use for an
-abbreviation.
-If the label is empty, return -1.
-If no uppercase character is found, return 0.
-Otherwise return the uppercase character.
-.RS
-.TP 5
-.B const char * \fIlabel
-is the label to test.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_calc_list_width
-Calculate the minimum width for the list, assuming none of the items
-are truncated.
-.RS
-.TP 5
-.B int \fIitem_no
-is the number of \fIitems\fP.
-.TP 5
-.B DIALOG_LISTITEM * \fIitems
-contains a \fIname\fP and \fItext\fP field,
-e.g., for checklists or radiobox lists.
-The function returns the sum of the widest columns
-needed for of each of these fields.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_calc_listh
-Calculate new height and list_height values.
-.RS
-.TP 5
-.B int * \fIheight
-on input, is the height without adding the list-height.
-On return, this contains the total list-height and is the
-actual widget's height.
-.TP 5
-.B int * \fIlist_height
-on input, is the requested list-height.
-On return, this contains the number of rows available for displaying
-the list after taking into account the screen size and
-the \fBdialog_vars.begin_set\fP and \fBdialog_vars.begin_y\fP variables.
-.TP 5
-.B int \fIitem_no
-is the number of \fIitems\fP in the list.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_calc_listw
-This function is obsolete, provided for library-compatibility.
-It is replaced by \fIdlg_calc_list_width\fP.
-.RS
-.TP 5
-.B int \fIitem_no
-is the number of \fIitems\fP.
-.TP 5
-.B char ** \fIitems
-is a list of character pointers.
-.TP 5
-.B int \fIgroup
-is the number of items in each group, e.g., the second array index.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_char_to_button
-Given a list of button labels,
-and a character which may be the abbreviation for one, find it, if it exists.
-An abbreviation will be the first character
-which happens to be capitalized in the label.
-If the character is found, return its index within the list of \fIlabels\fP.
-Otherwise, return \fBDLG_EXIT_UNKNOWN\fP.
-.RS
-.TP 5
-.B int \fIch
-is the character to find.
-.TP 5
-.B const char ** \fIlabels
-is a list of (pointers to) button labels terminated by a null pointer.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_checklist
-This entrypoint provides the \fB--checklist\fP or \fP--radiolist\fP
-functionality without the limitations of \fBdialog\fP's command-line syntax
-(compare to \fBdialog_checklist\fP).
-.RS
-.TP 5
-.B const char * \fItitle
-is the title string to display at the top of the widget.
-.TP 5
-.B const char * \fIcprompt
-is the prompt text shown within the widget.
-.TP 5
-.B int \fIheight
-is the desired height of the box.
-If zero, the height is adjusted to use the available screen size.
-.TP 5
-.B int \fIwidth
-is the desired width of the box.
-If zero, the height is adjusted to use the available screen size.
-.TP 5
-.B int \fIlist_height
-is the minimum height to reserve for displaying the list.
-If zero, it is computed based on the given \fIheight\fP and \fIwidth\fP.
-.TP 5
-.B int \fIitem_no
-is the number of \fIitems\fP.
-.TP 5
-.B DIALOG_LISTITEM * \fIitems
-This is a list of the items to display in the checklist.
-.TP 5
-.B const char * \fIstates
-This is a list of characters to display for the given states.
-Normally a checklist provides true (1) and false (0) values,
-which the widget displays as "*" and space, respectively.
-An application may set this parameter to an arbitrary null-terminated string.
-The widget determines the number of states from the length of this string,
-and will cycle through the corresponding display characters as the user
-presses the space-bar.
-.TP 5
-.B int \fIflag
-This is should be one of \fBFLAG_CHECK\fP or \fPFLAG_RADIO\fP,
-depending on whether the widget should act as a checklist or radiobox.
-.TP 5
-.B int * \fIcurrent_item
-The widget sets the referenced location to the index of the current display
-item (cursor) when it returns.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_clear
-Set window to the default dialog screen attribute.
-This is set in the rc-file with \fBscreen_color\fP.
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_clr_result
-Free storage used for the result buffer (\fBdialog_vars.input_result\fP).
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_color_count
-Return the number of colors that can be configured in \fBdialog\fP.
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_color_setup
-Initialize the color pairs used in \fBdialog\fP.
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_count_columns
-Returns the number of columns used for a string.
-This is not necessarily the number of bytes in a string.
-.RS
-.TP 5
-.B const char * \fIstring
-is the string to measure.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_count_wchars
-Returns the number of wide-characters in the string.
-.RS
-.TP 5
-.B const char * \fIstring
-is the string to measure.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_create_rc
-Create a configuration file,
-i.e., write internal tables to a file which can be read back by \fBdialog\fP
-as an rc-file.
-.RS
-.TP 5
-.B const char * \fIfilename
-is the name of the file to write to.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_ctl_size
-If \fBdialog_vars.size_err\fP is true,
-check if the given window size is too large to fit on the screen.
-If so, exit with an error reporting the size of the window.
-.RS
-.TP 5
-.B int \fIheight
-is the window's height
-.TP 5
-.B int \fIwidth
-is the window's width
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_default_formitem
-If \fBdialog_vars.default_item\fP is not null,
-find that name by matching the \fIname\fP field in the list of form \fIitems\fP.
-If found, return the index of that item in the list.
-Otherwise, return zero.
-.RS
-.TP 5
-.B DIALOG_FORMITEM * \fIitems
-is the list of items to search.
-It is terminated by an entry with a null \fIname\fP field.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_default_item
-This function is obsolete, provided for library-compatibility.
-It is replaced by \fIdlg_default_formitem\fP and \fIdlg_default_listitem\fP.
-.RS
-.TP 5
-.B char ** \fIitems
-is the list of items to search.
-.TP 5
-.B int \fIllen
-is the number of items in each group, e.g., the second array index.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_defaultno_button
-If \fBdialog_vars.defaultno\fP is true, and \fBdialog_vars.nocancel\fP is not,
-find the button-index for the "Cancel" button.
-Otherwise, return the index for "OK" (always zero).
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_del_window
-Remove a window, repainting everything else.
-.RS
-.TP 5
-.B WINDOW * \fIwin
-is the window to remove.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_does_output
-This is called each time a widget is invoked which may do output.
-It increments dialog_state.output_count,
-so the output function in \fBdialog\fP can test this and add a separator.
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_draw_arrows
-Draw up/down arrows on a window, e.g., for scrollable lists.
-It calls \fBdlg_draw_arrows2\fP using the
-\fImenubox_color\fP and \fImenubox_border_color\fP attributes.
-.RS
-.TP 5
-.B WINDOW * \fIdialog
-is the window on which to draw an arrow.
-.TP 5
-.B int \fItop_arrow
-is true if an up-arrow should be drawn at the top of the window.
-.TP 5
-.B int \fIbottom_arrow
-is true if an down-arrow should be drawn at the bottom of the window.
-.TP 5
-.B int \fIx
-is the zero-based column within the window on which to draw arrows.
-.TP 5
-.B int \fItop
-is the zero-based row within the window on which to draw up-arrows
-as well as a horizontal line to show the window's top.
-.TP 5
-.B int \fIbottom
-is the zero-based row within the window on which to draw down-arrows
-as well as a horizontal line to show the window's bottom.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_draw_arrows2
-Draw up/down arrows on a window, e.g., for scrollable lists.
-.RS
-.TP 5
-.B WINDOW * \fIdialog
-is the window on which to draw an arrow.
-.TP 5
-.B int \fItop_arrow
-is true if an up-arrow should be drawn at the top of the window.
-.TP 5
-.B int \fIbottom_arrow
-is true if an down-arrow should be drawn at the bottom of the window.
-.TP 5
-.B int \fIx
-is the zero-based column within the window on which to draw arrows.
-.TP 5
-.B int \fItop
-is the zero-based row within the window on which to draw up-arrows
-as well as a horizontal line to show the window's top.
-.TP 5
-.B int \fIbottom
-is the zero-based row within the window on which to draw down-arrows
-as well as a horizontal line to show the window's bottom.
-.TP 5
-.B chtype \fIattr
-is the window's background attribute.
-.TP 5
-.B chtype \fIborderattr
-is the window's border attribute.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_draw_bottom_box
-Draw a partial box at the bottom of a window,
-e.g., to surround a row of buttons.
-It is designed to merge with an existing box around
-the whole window, so it uses tee-elements rather than corner-elements
-on the top corners of this box.
-.RS
-.TP 5
-.B WINDOW * \fIwin
-is the window to update.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_draw_box
-Draw a rectangular box with line drawing characters.
-.RS
-.TP 5
-.B WINDOW * \fIwin
-is the window to update.
-.TP 5
-.B int \fIy
-is the top row of the box.
-.TP 5
-.B int \fIx
-is the left column of the box.
-.TP 5
-.B int \fIheight
-is the height of the box.
-.TP 5
-.B int \fIwidth
-is the width of the box.
-.TP 5
-.B chtype \fIboxchar
-is used to color the right/lower edges.
-It also is fill-color used for the box contents.
-.TP 5
-.B chtype \fIborderchar
-is used to color the upper/left edges.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_draw_buttons
-Print a list of buttons at the given position.
-.RS
-.TP 5
-.B WINDOW * \fIwin
-is the window to update.
-.TP 5
-.B int \fIy
-is the starting row.
-.TP 5
-.B int \fIx
-is the starting column.
-.TP 5
-.B const char ** \fIlabels
-is a list of (pointers to) button labels terminated by a null pointer.
-.TP 5
-.B int \fIselected
-is the index within the list of the selected button.
-.TP 5
-.B int \fIvertical
-is true if the buttons are arranged in a column rather than a row.
-.TP 5
-.B int \fIlimit
-is the number of columns (or rows if \fIvertical\fP) allowed for the display.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_draw_shadow
-Draw shadows along the right and bottom edge of a window to give it
-a 3-dimensional look.
-(The height, etc., may not be the same as the window's actual values).
-.RS
-.TP 5
-.B WINDOW * \fIwin
-is the window to update.
-.TP 5
-.B int \fIheight
-is the height of the window.
-.TP 5
-.B int \fIwidth
-is the width of the window.
-.TP 5
-.B int \fIy
-is the top row of the window.
-.TP 5
-.B int \fIx
-is the left column of the window.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_draw_title
-Draw a title centered at the top of the window.
-.RS
-.TP 5
-.B WINDOW * \fIwin
-is the window to update.
-.TP 5
-.B const char * \fItitle
-is the title string to display at the top of the widget.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_dump_keys
-Write all user-defined key-bindings to the given stream,
-e.g., as part of \fBdlg_create_rc\fP.
-.RS
-.TP 5
-.B FILE * \fIfp
-is the stream on which to write the bindings.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_edit_offset
-Given the character-offset in the string,
-returns the display-offset where
-dialog should position the cursor.
-In this context, "characters" may be multicolumn,
-since the string can be a multibyte character string.
-.RS
-.TP 5
-.B char * \fIstring
-is the string to analyze
-.TP 5
-.B int \fIoffset
-is the character-offset
-.TP 5
-.B int \fIx_last
-is a limit on the column positions that can be used,
-e.g., the window's size.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_edit_string
-Updates the string and character-offset, given various editing characters
-or literal characters which are inserted at the character-offset.
-Returns true if an editing change was made (and the display should
-be updated), and false if the key was something like KEY_ENTER,
-which is a non-editing action outside this function.
-.RS
-.TP 5
-.B char * \fIstring
-is the (multibyte) string to update
-.TP 5
-.B int * \fIoffset
-is the character-offset
-.TP 5
-.B int \fIkey
-is the editing key
-.TP 5
-.B int \fIfkey
-is true if the editing key is a function-key
-.TP 5
-.B bool \fIforce
-is used in a special loop case by calling code to force the return
-value of this function when a function-key code 0 is passed in.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_exit
-Given an internal exit code,
-check if the corresponding environment variable is set.
-If so, remap the exit code to match the environment variable.
-Finally call \fBexit\fP with the resulting exit code.
-.RS
-.TP 5
-.B int \fIcode
-is the internal exit code, e.g., \fBDLG_EXIT_OK\fP,
-which may be remapped.
-.RE
-.IP
-The \fBdialog\fP program uses this function
-to allow shell scripts to remap the exit codes so they can distinguish ESC
-from ERROR.
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_exit_buttoncode
-Map the given button index for \fBdlg_exit_label\fP into dialog's exit-code.
-.RS
-.TP 5
-.B int \fIbutton
-is the button index
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_exit_label
-Return a list of button labels.
-If dialog_var.extra_button is true, return the result of \fBdlg_ok_labels\fP.
-Otherwise, return a list with the "Exit" label and (if \fBdialog_vars.help_button\fP
-is set) the "Help" button as well.
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_exiterr
-Quit program killing all \fBtailboxbg\fP widgets.
-.RS
-.TP 5
-.B const char * \fIfmt
-is the format of the \fBprintf\fP-like message to write.
-.TP 5
-.
-are the variables to apply to the \fIfmt\fP format.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_find_index
-Given the character-offset to find in the list, return the corresponding
-array index.
-.RS
-.TP 5
-.B const int *\fIlist
-contains a list of character-offsets,
-i.e., indices into a string that denote the beginning of multibyte characters.
-.TP 5
-.B int \fIlimit
-is the last index into \fBlist\fP to search.
-.TP 5
-.B int \fIto_find
-is the character-offset to find.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_flush_getc
-Cancel the local data saved by \fBdlg_last_getc\fP.
-.\" ---------------------------------------------------------------------------
-.IP dlg_editbox
-This entrypoint provides the \fB--editbox\fP
-functionality without the limitations of \fBdialog\fP's command-line syntax
-(compare to \fBdialog_editbox\fP).
-.RS
-.TP 5
-.B const char * \fItitle
-is the title string to display at the top of the widget.
-.TP 5
-.B char *** \fIlist
-is a pointer to an array of \fBchar\ *\fP pointers.
-The array is allocated by the caller,
-and so are the strings to which it points.
-The \fBdlg_editbox\fP function may reallocate the
-array and the strings.
-.TP 5
-.B int * \fIrows
-points to the nominal length of \fIlist\fP.
-The referenced value is updated if\fIlist\fP is reallocated.
-.TP 5
-.B int \fIheight
-is the desired height of the box.
-If zero, the height is adjusted to use the available screen size.
-.TP 5
-.B int \fIwidth
-is the desired width of the box.
-If zero, the height is adjusted to use the available screen size.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_form
-This entrypoint provides the \fB--form\fP
-functionality without the limitations of \fBdialog\fP's command-line syntax
-(compare to \fBdialog_form\fP).
-.RS
-.TP 5
-.B const char * \fItitle
-is the title string to display at the top of the widget.
-.TP 5
-.B const char * \fIcprompt
-is the prompt text shown within the widget.
-.TP 5
-.B int \fIheight
-is the desired height of the box.
-If zero, the height is adjusted to use the available screen size.
-.TP 5
-.B int \fIwidth
-is the desired width of the box.
-If zero, the height is adjusted to use the available screen size.
-.TP 5
-.B int \fIform_height
-is the minimum height to reserve for displaying the list.
-If zero, it is computed based on the given \fIheight\fP and \fIwidth\fP.
-.TP 5
-.B int \fIitem_no
-is the number of \fIitems\fP.
-.TP 5
-.B DIALOG_FORMITEM * \fIitems
-This is a list of the items to display in the form.
-.TP 5
-.B int * \fIcurrent_item
-The widget sets the referenced location to the index of the current display
-item (cursor) when it returns.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_free_columns
-Free data allocated by \fBdlg_align_columns\fP.
-.RS
-.TP 5
-.B char **\fItarget
-This is the array which was reformatted.
-It points to the first string to free.
-.TP 5
-.B int \fIper_row
-This is the size of the struct for each row of the array.
-.TP 5
-.B int \fInum_rows
-This is the number of rows in the array.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_free_formitems
-Free memory owned by a list of DIALOG_FORMITEM's.
-.RS
-.TP 5
-.B DIALOG_FORMITEM * \fIitems
-is the list to free.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_getc
-Read a character from the given window.
-Handle repainting here (to simplify
-things in the calling application).
-Also, if input-callback(s) are set up,
-poll the corresponding files and handle the updates,
-e.g., for displaying a tailbox.
-Returns the key-code.
-.RS
-.TP 5
-.B WINDOW * \fIwin
-is the window within which to read.
-.TP 5
-.B int * \fIfkey
-as a side-effect, set this to true if the key-code is really a function-key.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_getc_callbacks
-passes the given key-code \fIch\fP to the current window that
-has established a callback.
-If the callback returns zero, remove it and try the next window.
-If no more callbacks remain, return.
-If any callbacks were found, return true, otherwise false.
-.RS
-.TP 5
-.B int \fIch
-is the key-code
-.TP 5
-.B int \fIfkey
-is true if the key is a function-key
-.TP 5
-.B int * \fIresult
-is used to pass an exit-code to the caller,
-which should pass that via \fBdlg_exit\fP.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_index_columns
-Build a list of the display-columns for the given multibyte string's characters.
-.RS
-.TP 5
-.B const char * \fIstring
-is the string to analyze
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_index_wchars
-Build an index of the wide-characters in the string,
-so the caller can easily tell
-which byte-offset begins a given wide-character.
-.RS
-.TP 5
-.B const char * \fIstring
-is the string to analyze
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_item_help
-Draw the string for the \fBdialog_vars.item_help\fP feature.
-.RS
-.TP 5
-.B char * \fItxt
-is the help-message
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_killall_bg
-If \fBdialog\fP has callbacks active,
-purge the list of all that are not marked
-to keep in the background.
-If any remain, run those in a background process.
-.RS
-.TP 5
-.B int * \fIretval
-stores the exit-code to pass back to the caller.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_last_getc
-returns the most recent character that was read via \fBdlg_getc\fP.
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_limit_columns
-Given a column limit,
-count the number of wide characters that can fit into that limit.
-The offset is used to skip over a leading character
-that was already written.
-.RS
-.TP 5
-.B const char * \fIstring
-is the string to analyze
-.TP 5
-.B int \fIlimit
-is the column limit
-.TP 5
-.B int \fIoffset
-is the starting offset from which analysis should continue
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_lookup_key
-Check for a key-binding.
-If there is no binding associated with the widget, it simply returns
-the given curses-key.
-Otherwise, it returns the result of the binding
-.RS
-.TP 5
-.B WINDOW * \fIwin
-is the window on which the binding is checked
-.TP 5
-.B int \fIcurses_key
-is the curses key-code
-.TP 5
-.B int * \fIdialog_key
-is the corresponding dialog internal code
-(see \fBDLG_KEYS_ENUM\fP in dlg_key.h).
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_max_input
-Limit the parameter according to \fBdialog_vars.max_input\fP
-.RS
-.TP 5
-.B int \fImax_len
-is the value to limit
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_match_char
-Match a given character against the beginning of the string,
-ignoring case of the given character.
-The matching string must begin with an uppercase character.
-.RS
-.TP 5
-.B int \fIch
-is the character to check
-.TP 5
-.B const char * \fIstring
-is the string to search
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_menu
-This entrypoint provides the \fB--menu\fP
-functionality without the limitations of \fBdialog\fP's command-line syntax
-(compare to \fBdialog_menu\fP).
-.RS
-.TP 5
-.B const char * \fItitle
-is the title string to display at the top of the widget.
-.TP 5
-.B const char * \fIcprompt
-is the prompt text shown within the widget.
-.TP 5
-.B int \fIheight
-is the desired height of the box.
-If zero, the height is adjusted to use the available screen size.
-.TP 5
-.B int \fIwidth
-is the desired width of the box.
-If zero, the height is adjusted to use the available screen size.
-.TP 5
-.B int \fImenu_height
-is the minimum height to reserve for displaying the list.
-If zero, it is computed based on the given \fIheight\fP and \fIwidth\fP.
-.TP 5
-.B int \fIitem_no
-is the number of \fIitems\fP.
-.TP 5
-.B DIALOG_LISTITEM * \fIitems
-This is a list of the items to display in the form.
-.TP 5
-.B int * \fIcurrent_item
-The widget sets the referenced location to the index of the current display
-item (cursor) when it returns.
-.TP 5
-.B DIALOG_INPUTMENU \fIrename_menutext
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_move_window
-Moves/resizes the given window to the given position and size.
-.RS
-.TP 5
-.B WINDOW *\fIwin
-is the window to move/resize.
-.TP 5
-.B WINDOW *\fIheight
-is the height of the resized window.
-.TP 5
-.B WINDOW *\fIwidth
-is the width of the resized window.
-.TP 5
-.B WINDOW *\fIy
-y-ordinate to use for the repositioned window.
-.TP 5
-.B WINDOW *\fIx
-x-ordinate to use for the repositioned window.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_mouse_bigregion
-Retrieve the big-region under the pointer.
-.RS
-.TP 5
-.B int \fIy
-is the row on which the mouse click occurred
-.TP 5
-.B int \fIx
-is the column on which the mouse click occurred
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_mouse_free_regions
-Free the memory associated with mouse regions.
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_mouse_mkbigregion
-Creates a region on which the mouse-clicks will return a specifed code.
-.RS
-.TP 5
-.B int \fIy
-is the top-row of the region.
-.TP 5
-.B int \fIx
-is the left-column of the region.
-.TP 5
-.B int \fIheight
-is the height of the region.
-.TP 5
-.B int \fIwidth
-is the width of the region.
-.TP 5
-.B int \fIcode
-is a code used to make the region unique within a widget
-.TP 5
-.B int \fIstep_x
-is used in modes 2 (columns) and 3 (cells) to determine the width
-of a column/cell.
-.TP 5
-.B int \fIstep_y
-is currently unused
-.TP 5
-.B int \fImode
-is used to determine how the mouse position is translated into
-a code (like a function-key):
-.RS
-.TP
-1
-index by lines
-.TP
-2
-index by columns
-.TP
-3
-index by cells
-.RE
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_mouse_mkregion
-.RS
-.TP 5
-.B int \fIy
-is the top-row of the region.
-.TP 5
-.B int \fIx
-is the left-column of the region.
-.TP 5
-.B int \fIheight
-is the height of the region.
-.TP 5
-.B int \fIwidth
-is the width of the region.
-.TP 5
-.B int \fIcode
-is a code used to make the region unique within a widget
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_mouse_region
-Retrieve the frame under the mouse pointer
-.RS
-.TP 5
-.B int \fIy
-is the row of the mouse-click
-.TP 5
-.B int \fIx
-is the column of the mouse-click
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_mouse_setbase
-Sets a base for subsequent calls to \fBdlg_mouse_mkregion\fP,
-so they can make regions relative to the start of a given window.
-.RS
-.TP 5
-.B int \fIx
-is the left-column for the base
-.TP 5
-.B int \fIy
-is the top-row for the base
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_mouse_wgetch
-is a wrapper for \fBdlg_getc\fP which additionally maps mouse-clicks
-(if the curses library supports those) into extended function-keys
-which encode the position according to the \fImode\fP in
-\fBdlg_mouse_mkbigregion\fP.
-Returns the corresponding key-code.
-.RS
-.TP 5
-.B WINDOW * \fIwin
-is the window on which to perform the input
-.TP 5
-.B int * \fIfkey
-the referenced location is set to true if the key-code is an actual
-or extended (mouse) function-key.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_mouse_wgetch_nowait
-This is a non-blocking variant of \fBdlg_mouse_wgetch\fP.
-.RS
-.TP 5
-.B WINDOW * \fIwin
-is the window on which to perform the input
-.TP 5
-.B int * \fIfkey
-the referenced location is set to true if the key-code is an actual
-or extended (mouse) function-key.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_need_separator
-Check if an output-separator is needed.
-If \fBdialog_vars.output_separator\fP is set, return true.
-Otherwise, if \fBdialog_vars.input_result\fP is nonempty, return true.
-If neither, return false.
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_new_modal_window
-Create a modal window, optionally with a shadow.
-The shadow is created if dialog_state.use_shadow is true.
-.RS
-.TP 5
-.B WINDOW * \fIparent
-is the parent window (usually the top-level window of a widget)
-.TP 5
-.B int \fIheight
-is the window's height
-.TP 5
-.B int \fIwidth
-is the window's width
-.TP 5
-.B int \fIy
-is the window's top-row
-.TP 5
-.B int \fIx
-is the window's left-column
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_new_window
-Create a window, optionally with a shadow.
-The shadow is created if dialog_state.use_shadow is true.
-.RS
-.TP 5
-.B int \fIheight
-is the window's height
-.TP 5
-.B int \fIwidth
-is the window's width
-.TP 5
-.B int \fIy
-is the window's top-row
-.TP 5
-.B int \fIx
-is the window's left-column
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_next_button
-Return the next index in the list of labels.
-.RS
-.TP 5
-.B const char ** \fIlabels
-is a list of (pointers to) button labels terminated by a null pointer.
-.TP 5
-.B int \fIbutton
-is the current button-index.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_next_ok_buttonindex
-Assuming that the caller is using \fBdlg_ok_labels\fP to list buttons,
-find the next index in the list of buttons.
-.RS
-.TP 5
-.B int \fIcurrent
-is the current index in the list of buttons
-.TP 5
-.B int \fIextra
-if negative, provides a way to enumerate extra active areas on the widget.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_ok_buttoncode
-Map the given button index for \fBdlg_ok_labels\fP
-into \fBdialog\fP's exit-code.
-.RS
-.TP 5
-.B int \fIbutton
-is the button-index (which is not necessarily the same as the index
-in the list of labels).
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_ok_label
-Returns a list with the "Ok" label,
-and if \fBdialog_vars.help_button\fP is true, the "Help" label as well.
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_ok_labels
-Return a list of button labels for the OK/Cancel group of widgets.
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_ordinate
-Decode the string as an integer, decrement if greater than zero to make
-a curses-ordinate from a dialog-ordinate.
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_parse_bindkey
-Parse the parameters of the "bindkeys" configuration-file entry. This
-expects widget name which may be "*", followed by curses key definition and
-then dialog key definition.
-.RS
-.TP 5
-.B char * \fIparams
-is the parameter string to parse.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_parse_rc
-Parse the configuration file and set up variables.
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_prev_button
-Return the previous index in the list of labels.
-.RS
-.TP 5
-.B const char ** \fIlabels
-is a list of (pointers to) button labels terminated by a null pointer.
-.TP 5
-.B int \fIbutton
-is the current button index
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_print_line
-Print one line of the prompt in the window within the limits of the
-specified right margin.
-The line will end on a word boundary and a pointer
-to the start of the next line is returned, or a NULL pointer if the end of
-*prompt is reached.
-.RS
-.TP 5
-.B WINDOW *\fIwin
-is the window to update.
-.TP 5
-.B chtype *\fIattr
-holds the starting attributes, and is updated to reflect the final attributes
-applied to the string.
-.TP 5
-.B const char *\fIprompt
-is the string to print
-.TP 5
-.B int \fIlm
-is the left margin.
-.TP 5
-.B int \fIrm
-is the right margin
-.TP 5
-.B int *\fIx
-returns the ending x-ordinate.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_prev_ok_buttonindex
-Find the previous button index in the list from \fBdlg_ok_labels\fP.
-.RS
-.TP 5
-.B int \fIcurrent
-is the current index
-.TP 5
-.B int \fIextra
-if negative provides a way to enumerate extra active areas on the widget.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_print_autowrap
-Print a string of text in a window, automatically wrap around to the next
-line if the string is too long to fit on one line.
-Note that the string may contain embedded newlines.
-.RS
-.TP 5
-.B WINDOW * \fIwin
-is the window to update.
-.TP 5
-.B const char * \fIprompt
-is the string to print
-.TP 5
-.B int \fIheight
-is the nominal height the wrapped string is limited to
-.TP 5
-.B int \fIwidth
-is the width that the wrapping should occur in
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_print_size
-If \fBdialog_vars.print_siz\fP is true,
-print the given height/width (from a widget)
-to dialog_state.output, e.g.,
-\fBSize: height, width\fP.
-.RS
-.TP 5
-.B int \fIheight
-is the window's height
-.TP 5
-.B int \fIwidth
-is the window's width
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_print_text
-Print up to \fIcols\fP columns from \fBtext\fP,
-optionally rendering \fBdialog\fP's escape sequences for attributes and color.
-.RS
-.TP 5
-.B WINDOW * \fIwin
-is the window to update.
-.TP 5
-.B const char * \fItxt
-is the string to print
-.TP 5
-.B int \fIcol
-is the column limit
-.TP 5
-.B chtype * \fIattr
-holds the starting attributes, and is updated to reflect the final attributes
-applied to the string.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_put_backtitle
-Display the background title if \fBdialog_vars.backtitle\fP is non-null.
-The background title is shown at the top of the screen.
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_register_buttons
-The widget developer should call this function after \fBdlg_register_window\fP,
-for the list of button labels associated with the widget.
-One may bind a key to a button, e.g., "OK" for \fBDLGK_OK\fP,
-.RS
-.TP 5
-.B WINDOW * \fIwin
-is the window with which to associate the buttons
-.TP 5
-.B const char * \fIname
-is the widget's binding name (usually the name of the widget).
-.TP 5
-.B const char ** \fIbuttons
-is the list of buttons
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_register_window
-For a given named widget's window, associate a binding table.
-.RS
-.TP 5
-.B WINDOW * \fIwin
-is the window with which to associate the buttons
-.TP 5
-.B const char * \fIname
-is the widget's binding name (usually the name of the widget).
-.TP 5
-.B DLG_KEYS_BINDING * \fIbinding
-is the binding table
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_remove_callback
-Remove a callback.
-.RS
-.TP 5
-.B DIALOG_CALLBACK \fI* p
-contains the callback information.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_restore_vars
-Restore dialog's variables from the given variable (see \fBdialog_save_vars\fP).
-.RS
-.TP 5
-.B DIALOG_VARS * \fIsave
-is the variable from which to restore.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_result_key
-Test a dialog internal keycode to see if it corresponds to one of the push
-buttons on the widget such as "OK".
-This is only useful if there are user-defined key bindings, since there are
-no built-in bindings that map directly to \fBDLGK_OK\fP, etc.
-Return true if a mapping was done.
-.RS
-.TP 5
-.B int \fIdialog_key
-is the dialog key to test
-.TP 5
-.B int \fIfkey
-is true if this is a function key
-.TP 5
-.B int * \fIresultp
-store the result of the mapping in the referenced location.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_save_vars
-Save dialog's variables into the given variable (see \fBdialog_restore_vars\fP).
-.RS
-.TP 5
-.B DIALOG_VARS * \fIsave
-is the variable into which to save.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_set_focus
-Set focus on the given window,
-making it display above other windows on the screen.
-.RS
-.TP 5
-.B WINDOW * \fIparent
-is the parent window (usually the top-level window of a widget)
-.TP 5
-.B WINDOW * \fIwin
-is the window on which to place focus (usually a subwindow of a widget)
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_set_result
-Setup a fixed-buffer for the result in \fBdialog_vars.input_result\fP
-.RS
-.TP 5
-.B const char * \fIstring
-is the new contents for the result
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_show_string
-Displays the string, shifted as necessary, to fit within the box and show
-the current character-offset.
-.RS
-.TP 5
-.B WINDOW * \fIwin
-is the window within which to display
-.TP 5
-.B const char * \fIstring
-is the string to display
-.TP 5
-.B int \fIoffset
-is the starting (character, not bytes) offset
-.TP 5
-.B chtype \fIattr
-is the window attribute to use for the string
-.TP 5
-.B int \fIy_base
-beginning row on screen
-.TP 5
-.B int \fIx_base
-beginning column on screen
-.TP 5
-.B int \fIx_last
-number of columns on screen
-.TP 5
-.B bool \fIhidden
-if true, do not echo input
-.TP 5
-.B bool \fIforce
-if true, force repaint
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_strclone
-duplicate the string, like \fBstrdup\fP.
-.RS
-.TP 5
-.B const char * \fIcprompt
-is the string to duplicate
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_strcmp
-compare two strings, ignoring case.
-.RS
-.TP 5
-.B const char \fI* a
-is one string
-.TP 5
-.B const char \fI* b
-is the other string
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_sub_window
-create a subwindow, e.g., for an input area of a widget
-.RS
-.TP 5
-.B WINDOW * \fIwin
-is the parent window
-.TP 5
-.B int \fIheight
-is the subwindow's height
-.TP 5
-.B int \fIwidth
-is the subwindow's width
-.TP 5
-.B int \fIy
-is the subwindow's top-row
-.TP 5
-.B int \fIx
-is the subwindow's left-column
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_tab_correct_str
-If the \fBdialog_vars.tab_correct\fP is true, convert tabs to single spaces.
-Return the converted result.
-The caller is responsible for freeing the string.
-.RS
-.TP 5
-.B char * \fIprompt
-is the string to convert
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_trace
-If the parameter is non-null, opens a trace file with that
-name and stores the file pointer in \fBdialog_state.trace\fP.
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_trace_chr
-If \fBdialog_state.trace\fP is set,
-translate the parameters into a printable representation,
-log it on a "chr" line.
-.RS
-.TP 5
-.B int ch
-is the nominal keycode value.
-.TP 5
-.B int fkey
-is nonzero if the value is really a function key.
-Some of these may be values declared in the DLG_KEYS_ENUM.
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_trace_win
-If \fBdialog_state.trace\fP is set,
-log a printable picture of the given window.
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_trim_string
-Change embedded "\\n" substrings to '\\n' characters and tabs to single spaces.
-If there are no "\\n"s, the function strips all extra spaces, for justification.
-If it has "\\n"'s, the function preserves extra spaces.
-If \fBdialog_vars.cr_wrap\fP is set, the function preserves '\\n's.
-.RS
-.TP 5
-.B char * \fIsrc
-is the string to trim
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_unregister_window
-Remove the bindings for a given window.
-.RS
-.TP 5
-.B WINDOW * \fIwin
-is the window from which to remove bindings
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_yes_buttoncode
-Map the given button index for \fBdlg_yes_labels\fP into \fBdialog\fP's exit-code.
-.RS
-.TP 5
-.B int \fIbutton
-is the button index
-.RE
-.\" ---------------------------------------------------------------------------
-.TP 5
-.B dlg_yes_labels
-Return a list of buttons for Yes/No labels.
-.
-.\" ************************************************************************
-.SH SEE ALSO
-dialog (1).
-.
-.\" ************************************************************************
-.SH AUTHOR
-Thomas E. Dickey