term::interact::menu - Terminal widget, menu
package require Tcl 8.4 package require term::interact::menu ?0.1? term::interact::menu object dict ?options...? object interact object done object clear object configure object configure option object configure option value... object cget option ______________________________________________________________________________
This package provides a class for the creation of a simple menu control.
The package exports a single command, the class command, enabling the creation of menu instances. Its API is: term::interact::menu object dict ?options...? This command creates a new menu object with the name object, initializes it, and returns the fully qualified name of the object command as its result. The argument is the menu to show, possibly followed by configuration options and their values. The options are explained in the section Configuration. The menu is a dictionary maping labels to symbolic action codes.
The objects created by the class command provide the methods listed below: object interact Shows the menu in the screen at the configured location and starts interacting with it. This opens its own event loop for the processing of incoming characters. The method returns when the interaction has completed. See section Interaction for a description of the possible interaction. The method returns the symbolic action of the menu item selected by the user at the end of the interaction. object done This method can be used by user supplied actions to terminate the interaction with the object. object clear This method can be used by user supplied actions to remove the menu from the terminal. object configure object configure option object configure option value... object cget option Standard methods to retrieve and configure the options of the menu.
A menu instance recognizes the following options: -in chan Specifies the channel to read character sequences from. Defaults to stdin. -out chan Specifies the channel to write the menu contents to. Defaults to stdout. -column int Specifies the column of the terminal where the left margin of the menu display should appear. Defaults to 0, i.e. the left- most column. -line int Specifies the line of the terminal where the top margin of the menu display should appear. Defaults to 0, i.e. the top-most line. -height int Specifies the number of lines of text to show at most in the display. Defaults to 25. -actions dict Specifies a dictionary containing additional actions, using character sequences as keys. Note that these sequences cannot override the hardwired sequences described in section Interaction. -hilitleft int -hilitright int By default the entire selected menu entry is highlighted in revers output. However, when present these two options restrict revers dispay to the specified sub-range of the entry. -framed bool By default the menu is shown using only header and footer out of characters box graphics. If this flag is set the menu is fully enclosed in a box.
A menu object recognizes the control sequences listed below and acts as described. The user can supply more control sequences to act on via the configuration, but is not able to overide these defaults. Cursor Up The selection is moved up one entry, except if the first entry of the menu is already selected. Cursor Down The selection is moved down one entry, except if the last entry of the menu is already selected. Enter/Return The interaction with the object is terminated.
This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category term of the Tcllib Trackers [http://core.tcl.tk/tcllib/reportlist]. Please also report any ideas for enhancements you may have for either package and/or documentation.
control, menu, terminal, text display
Terminal control
Copyright (c) 2006 Andreas Kupries <andreas_kupries@users.sourceforge.net>
Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.
Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.
Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.
Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.
The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.
Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.
Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.
Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.