Dt/Help.h(file formats) Dt/Help.h(file formats)
NAME
Dt/Help.h -- help services definitions
SYNOPSIS
#include <Dt/Help.h>
DESCRIPTION
The Dt/Help.h header defines the variables and function prototypes for help services.
The header defines the following DtHelpDialogCallbackStruct windowHint constants:
DtHELP_POPUP_WINDOW
DtHELP_CURRENT_WINDOW
DtHELP_NEW_WINDOW
The header defines the following DtHelpDialogCallbackStruct hyperType constants:
DtHELP_LINK_JUMP_NEW
DtHELP_LINK_TOPIC
DtHELP_LINK_MAN_PAGE
DtHELP_LINK_APP_DEFINE
DtHELP_LINK_TEXT_FILE
The header defines the following DtHelpDialogCallbackStruct reason constants:
DtCR_HELP_LINK_ACTIVATE
DtCR_HELP_CLOSE
DtCR_HELP_HELP
The header defines the following DtNScrollBarPolicy constants:
DtHELP_NO_SCROLLBARS
DtHELP_STATIC_SCROLLBARS
DtHELP_AS_NEEDED_SCROLLBARS
The header defines the following DtNhelpType constants:
DtHELP_TYPE_TOPIC
DtHELP_TYPE_STRING
DtHELP_TYPE_MAN_PAGE
DtHELP_TYPE_FILE
DtHELP_TYPE_DYNAMIC_STRING
The header defines the following DtNpaperSize constants:
DtHELP_PAPERSIZE_LETTER
DtHELP_PAPERSIZE_LEGAL
DtHELP_PAPERSIZE_EXECUTIVE
DtHELP_PAPERSIZE_A4
DtHELP_PAPERSIZE_B5
The header defines the following DtHelpQuickDialogGetChild constants:
DtHELP_QUICK_CLOSE_BUTTON
DtHELP_QUICK_PRINT_BUTTON
DtHELP_QUICK_HELP_BUTTON
DtHELP_QUICK_SEPARATOR
DtHELP_QUICK_MORE_BUTTON
DtHELP_QUICK_BACK_BUTTON
The header defines the following DtHelpReturnSelectedWidgetId constants:
DtHELP_SELECT_ERROR
DtHELP_SELECT_VALID
DtHELP_SELECT_ABORT
DtHELP_SELECT_INVALID
The header declares the following as functions:
void DtHelpSetCatalogName(char *catFile);
int DtHelpReturnSelectedWidgetId(Widget parent,
Cursor cursor,
Widget *widget);
SEE ALSO
Dt/HelpDialog.h - DtHelpDialog(5), Dt/HelpQuickD.h - DtHelpQuickD(5), DtCreateHelpQuickDialog(3), DtCreateHelpDialog(3), DtHelpSetCatalog-
Name(3), DtHelpReturnSelectedWidgetId(3), DtHelpDialog(3), DtHelpQuickDialog(3).
Dt/Help.h(file formats)
Check Out this Related Man Page
math::constants(n) Tcl Math Library math::constants(n)
__________________________________________________________________________________________________________________________________________________NAME
math::constants - Mathematical and numerical constants
SYNOPSIS
package require Tcl ?8.3?
package require math::constants ?1.0.1?
::math::constants::constants args
::math::constants::print-constants args
_________________________________________________________________DESCRIPTION
This package defines some common mathematical and numerical constants. By using the package you get consistent values for numbers like pi
and ln(10).
It defines two commands:
o One for importing the constants
o One for reporting which constants are defined and what values they actually have.
The motivation for this package is that quite often, with (mathematical) computations, you need a good approximation to, say, the ratio of
degrees to radians. You can, of course, define this like:
variable radtodeg [expr {180.0/(4.0*atan(1.0))}]
and use the variable radtodeg whenever you need the conversion.
This has two drawbacks:
o You need to remember the proper formula or value and that is error-prone.
o Especially with the use of mathematical functions like atan you assume that they have been accurately implemented. This is seldom or
never the case and for each platform you can get subtle differences.
Here is the way you can do it with the math::constants package:
package require math::constants
::math::constants::constants radtodeg degtorad
which creates two variables, radtodeg and (its reciprocal) degtorad in the calling namespace.
Constants that have been defined (their values are mostly taken from mathematical tables with more precision than usually can be handled)
include:
o basic constants like pi, e, gamma (Euler's constant)
o derived values like ln(10) and sqrt(2)
o purely numerical values such as 1/3 that are included for convenience and for the fact that certain seemingly trivial computations
like:
set value [expr {3.0*$onethird}]
give exactly the value you expect (if IEEE arithmetic is available).
PROCEDURES
The package defines the following public procedures:
::math::constants::constants args
Import the constants whose names are given as arguments
::math::constants::print-constants args
Print the constants whose names are given as arguments on the screen (name, value and description) or, if no arguments are given,
print all defined constants. This is mainly a convenience procedure.
BUGS, IDEAS, FEEDBACK
This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category math ::
constants of the Tcllib SF Trackers [http://sourceforge.net/tracker/?group_id=12883]. Please also report any ideas for enhancements you
may have for either package and/or documentation.
KEYWORDS
constants, degrees, e, math, pi, radians
CATEGORY
Mathematics
COPYRIGHT
Copyright (c) 2004 Arjen Markus <arjenmarkus@users.sourceforge.net>
math 1.0.1 math::constants(n)