NAME Term::Menus - Create Powerful Terminal, Console and CMD Enviroment Menus SYNOPSIS "use Term::Menus;" see METHODS section below DESCRIPTION Term::Menus allows you to create powerful Terminal, Console and CMD environment menus. Any perl script used in a Terminal, Console or CMD environment can now include a menu facility that includes sub-menus, forward and backward navigation, single or multiple selection capabilities, dynamic item creation and customized banners. All this power is simple to implement with a straight forward and very intuitive configuration hash structure that mirrors the actual menu architechture needed by the application. A separate configuration file is optional. Term::Menus is cross platform compatible. Term::Menus is a stand-alone - other CPAN modules are not needed for its implementation ( so it's *easy* to install! ;-) ) Term::Menus was initially conceived and designed to work seemlessly with the perl based Network Process Automation Utility Module called Net::FullAuto (Available in CPAN :-) - however, it is not itself dependant on other Net::FullAuto components, and will work with *any* perl script/application. Reasons to use this module are: * You have a list (or array) of items, and wish to present the user a simple CMD enviroment menu to pick a single item and return that item as a scalar (or simple string). Example: use Term::Menus; my @list=('First Item','Second Item','Third Item'); my $banner=" Please Pick an Item:"; my $selection=&pick(\@list,$banner); print "SELECTION = $selection\n"; The user sees ==> Please Pick an Item: 1. First Item 2. Second Item 3. Third Item (Press "q" to quit) PLEASE ENTER A CHOICE: --< 2 >----------------------------------- The user sees ==> SELECTION = Second Item * You have a large list of items and need scrolling capability: use Term::Menus; my @list=`ls -1 /bin`; my $banner=" Please Pick an Item:"; my $selection=&pick(\@list,$banner); print "SELECTION = $selection\n"; The user sees ==> Please Pick an Item: 1. arch 2. ash 3. awk 4. basename 5. bash 6. cat 7. chgrp 8. chmod 9. chown 10. cp 93 Total Choices Press ENTER (or "d") to scroll downward OR "u" to scroll upward (Press "q" to quit) PLEASE ENTER A CHOICE: ---------------------------------------- Please Pick an Item: 11. cpio 12. csh 13. cut 14. date 15. dd 16. df 17. echo 18. ed 19. egrep 20. env 93 Total Choices Press ENTER (or "d") to scroll downward OR "u" to scroll upward (Press "q" to quit) PLEASE ENTER A CHOICE: --< 14 >----------------------------------- The user sees ==> SELECTION = date * You need to select multiple items and return the selected list: use Term::Menus; my @list=`ls -1 /bin`; my %Menu_1=( Item_1 => { Text => "/bin Utility - ]Convey[", Convey => [ `ls -1 /bin` ], }, Select => 'Many', Banner => "\n Choose a /bin Utility :" ); my @selections=&Menu(\%Menu_1); print "SELECTIONS = @selections\n"; The user sees ==> Choose a /bin Utility : 1. /bin Utility - arch 2. /bin Utility - ash 3. /bin Utility - awk 4. /bin Utility - basename 5. /bin Utility - bash 6. /bin Utility - cat 7. /bin Utility - chgrp 8. /bin Utility - chmod 9. /bin Utility - chown 10. /bin Utility - cp a. Select All. c. Clear All. f. Finish. 93 Total Choices Press ENTER (or "d") to scroll downward OR "u" to scroll upward (Press "q" to quit) PLEASE ENTER A CHOICE: --< 3 >----------------------------------- --< 7 >----------------------------------- The user sees ==> Choose a /bin Utility : 1. /bin Utility - arch 2. /bin Utility - ash * 3. /bin Utility - awk 4. /bin Utility - basename 5. /bin Utility - bash 6. /bin Utility - cat * 7. /bin Utility - chgrp 8. /bin Utility - chmod 9. /bin Utility - chown 10. /bin Utility - cp a. Select All. c. Clear All. f. Finish. 93 Total Choices Press ENTER (or "d") to scroll downward OR "u" to scroll upward (Press "q" to quit) PLEASE ENTER A CHOICE: --< f >----------------------------------- The user sees ==> SELECTIONS = /bin Utility - awk /bin Utility - chgrp * You need sub-menus: use Term::Menus; my %Menu_2=( Label => 'Menu_2', Item_1 => { Text => "]Previous[ is a ]Convey[ Utility", Convey => [ 'Good','Bad' ] }, Select => 'One', Banner => "\n Choose an Answer :" ); my %Menu_1=( Label => 'Menu_1', Item_1 => { Text => "/bin/Utility - ]Convey[", Convey => [ `ls -1 /bin` ], Result => \%Menu_2, }, Select => 'One', Banner => "\n Choose a /bin Utility :" ); my @selections=&Menu(\%Menu_1); print "SELECTIONS=@selections\n"; The user sees ==> Choose a /bin Utility : 1. /bin Utility - arch 2. /bin Utility - ash 3. /bin Utility - awk 4. /bin Utility - basename 5. /bin Utility - bash 6. /bin Utility - cat 7. /bin Utility - chgrp 8. /bin Utility - chmod 9. /bin Utility - chown 10. /bin Utility - cp a. Select All. c. Clear All. f. Finish. 93 Total Choices Press ENTER (or "d") to scroll downward OR "u" to scroll upward (Press "q" to quit) PLEASE ENTER A CHOICE: --< 5 >----------------------------------- Choose an Answer : 1. bash is a Good Utility 2. bash is a Bad Utility (Press "q" to quit) PLEASE ENTER A CHOICE: --< 1 >----------------------------------- The user sees ==> SELECTIONS = bash is a Good Utility * You want to use a perl subroutine to create the text items or banner: (Note: READ THE COMMENTS embedded in the Menu_2 sample following. The syntax is a bit tricky and MUST be created exactly as described - otherwise it will NOT work!) package current_package_name; # Qualify subroutine calls with # &main:: if not using # a package architechture use Term::Menus; sub create_items { my $previous=shift; my @textlines=(); push @textlines, "$previous is a Good Utility"; push @textlines, "$previous is a Bad Utility"; return @testlines; ## return value must NOT be an array ## not an array reference } sub create_banner { my $previous=shift; return "\n Choose an Answer for $previous :" ## return value MUST be a string for banner } my %Menu_2=( Label => 'Menu_2', Item_1 => { Text => "]Convey[", Convey => "¤t_package_name::create_items(\"]Previous[\")", # IMPORTANT! '&' *must* be used to denote subroutine # as the first character # ¤t_package_name:: qualifier or &main:: # quaifiler MUST be used - otherwise # Term::Menus cannot locate it # embedded quote characters must be escaped # enclosing double quotes MUST be used - this is # a STRING being passed to Term::Menus that will # then be internally eval-ed during runtime # after the macro ]Previous[ is substituted # other macros and values can be passed as # arguments as follows: # (\"]Previous[\",\"AnyString\") }, Select => 'One', Banner => "¤t_package_name::create_banner(\"]Previous[\")", ## or "&main::create_banner(\"]Previous[\")", ## if using in top level script (file does NOT ## have .pm extension) ); my %Menu_1=( Label => 'Menu_1', Item_1 => { Text => "/bin/Utility - ]Convey[", Convey => [ `ls -1 /bin` ], Result => \%Menu_2, }, Select => 'One', Banner => "\n Choose a /bin Utility :" ); my @selections=&Menu(\%Menu_1); print "SELECTIONS=@selections\n"; The user sees ==> Choose a /bin Utility : 1. /bin Utility - arch 2. /bin Utility - ash 3. /bin Utility - awk 4. /bin Utility - basename 5. /bin Utility - bash 6. /bin Utility - cat 7. /bin Utility - chgrp 8. /bin Utility - chmod 9. /bin Utility - chown 10. /bin Utility - cp a. Select All. c. Clear All. f. Finish. 93 Total Choices Press ENTER (or "d") to scroll downward OR "u" to scroll upward (Press "q" to quit) PLEASE ENTER A CHOICE: --< 5 >----------------------------------- Choose an Answer for bash : 1. bash is a Good Utility 2. bash is a Bad Utility (Press "q" to quit) PLEASE ENTER A CHOICE: --< 1 >----------------------------------- The user sees ==> SELECTIONS = bash is a Good Utility More examples are in the EXAMPLES section below. Usage questions should be directed to the Usenet newsgroup comp.lang.perl.modules. Contact me, Brian Kelly , if you find any bugs or have suggestions for improvements. What To Know Before Using * There are two methods available with Term::Menus - &pick() and &Menu(). "&Menu()" uses "&pick()" - you can get the same results using only "&Menu()". However, if you need to simply pick one item from a single list - use "&pick()". The syntax is simpler, and you'll write less code. ;-) * You'll need to be running at least Perl version 5.002 to use this module. This module does not require any libraries that don't already come with a standard Perl distribution. METHODS pick - create a simple menu $pick = &pick ($list|\@list|['list',...],[$Banner]); Where *$list* is a variable containing a array or list reference. This argument can also be a escaped array (sending a reference) or an anonymous array (which also sends a reference). *$Banner* is an optional argument sending a customized Banner to top the simple menu - giving instructions, descriptions, etc. The default is "Please Pick an Item:" Menu - create a complex Menu $pick = &Menu ($list|\@list|['list',...],[$Banner]); Where *$pick* is a variable containing a array or list reference of the pick or picks. @picks = &Menu ($Menu_1|\%Menu_1|{ Label => 'Menu_1' }); Where *$Menu_1* is a hash reference to the top level Menu Configuration Hash Structure. Menu Configuration Hash Structures These are the building blocks of the overall Menu architecture. Each hash structure represents a *menu screen*. A single menu layer, has only one hash structure defining it. A menu with a single sub-menu will have two hash structures. The menus connect via the "Result" element of an *Item* - "Item_1" - hash structure in parent menu %Menu_1: my %Menu_2=( Label => 'Menu_2', Item_1 => { Text => "]Previous[ is a ]Convey[ Utility", Convey => [ 'Good','Bad' ] }, Select => 'One', Banner => "\n Choose an Answer :" ); my %Menu_1=( Label => 'Menu_1', Item_1 => { Text => "/bin/Utility - ]Convey[", Convey => [ `ls -1 /bin` ], Result => \%Menu_2, }, Select => 'One', Banner => "\n Choose a /bin Utility :" ); Menu Component Elements Each Menu Configuration Hash Structure consists of elements that define and control it's behavior, appearance, constitution and purpose. An element's syntax is as you would expect it to be in perl - a key string pointing to an assocaited value: "key => value". The following items list supported key names and ther associated value types: * Display => 'Integer' * * The *Display* key is an *optional* key that determines the number of Menu Items that will be displayed on each screen. This is useful when the items are multi-lined, or the screen size is bigger or smaller than the default number utilizes in the most practical fashion. The default number is 10. Display => 15, * Label => 'Char String consisting of ASCII Characters' * * The *Label* key provides a unique identifier to each Menu Structure. *Every Menu Configuration Hash Structure must have a valid and unique Label element* Otherwise "&Menu()" will throw an error. Label => 'Menu_1', * Item_ => { Item Configuration Hash Structure } * * The *Item_* elements define customized menu items. There are essentially two methods for creating menu items: The *Item_* elements, and the "]Convey[" macro (described later). The difference being that the "]Convey[" macro turns an Item Conguration Hash into an Item *Template* -> a powerful way to *Item*-ize large lists or quantities of data that would otherwise be difficult - even impossible - to anticipate and cope with manually. Item_1 => { Text => 'Item 1' }, Item_2 => { Text => 'Item 2' }, Items created via "]Convey[" macros have two drawbacks: * They all have the same format. * They all share the same "Result" element. The syntax and usage of *Item_* elements is important and extensive enough warrant it's own section. See *Item Configuration Hash Structures* below. * Select => 'One' --or-- 'Many' * * The *Select* element determines whether this particular menu layer allows the selection of multiple items - or a single item. The default is 'One'. Select => 'Many', * Banner => 'Char String consisting of ASCII Characters' * * The *Banner* element provides a customized descriptive header to the menu. *$Banner* is an optional element - giving instructions, descriptions, etc. The default is "Please Pick an Item:" Banner => "The following items are for selection,\n". "\tEnjoy the Experience!", NOTE: Macros (like "]Previous[" ) *can* be used in Banners! :-) ( See Item Configuration Macros below ) Item Congfiguration Hash Structures Each Menu Item can have an independant configurtion. Each Menu Configuration Hash Structure consists of elements that define and control it's behavior, appearance, constitution and purpose. An element's syntax is as you would expect it to be in perl - a key string pointing to an assocaited value: key => value. The following items list supported key names and ther associated value types: * Text => 'Char String consisting of ASCII Characters' * * The *Text* element provides a customized descriptive string for the Item. It is the text the user will see displayed, describing the selection. Text => 'This is Item_1', * Convey => [ List ] --or-- @List --or-- $Scalar --or-- 'ASCII String' * * The *Convey* element has a twofold purpose; it provides for the contents of the "]Convey[" macro, and defines or contains the string or result that is passed on to child menus - if any. Use of this configuration element is *optional*. If "Convey" is not a list, then it's value is passed onto child menus. If "Convey" *is* a list, then the Item selected is passed onto the children - if any. It is important to note, *when used*, that only the resulting *Convey* string - *NOT* the the Item "Text" value or string, is conveyed to child menus. When the "Convey" element is not used, the full Item "Text" value is conveyed to the children - if any. However, the full contents of the "Text" element is *returned* as the *Result* of the operation when the user completes all menu activity. See the *Macro* section below for more information. Convey => [ `ls -1` ] , * Default => 'Char String' --or-- Perl regular expression - qr/.../ * * The *Default* element provides a means to pre-select certain elements, as if the items were selected by the user. This can be done with two constructs - simple string or pre-compiled regular expression. Note: The "Default" element is available only when the "Select" element is set to 'Many' - "Select =" 'Many',> Default => 'base|chown', Default => qr/base|chown/i, The user sees ==> Choose a /bin Utility : 1. /bin Utility - arch 2. /bin Utility - ash 3. /bin Utility - awk * 4. /bin Utility - basename 5. /bin Utility - bash 6. /bin Utility - cat 7. /bin Utility - chgrp 8. /bin Utility - chmod * 9. /bin Utility - chown 10. /bin Utility - cp a. Select All. c. Clear All. f. Finish. 93 Total Choices Press ENTER (or "d") to scroll downward OR "u" to scroll upward (Press "q" to quit) PLEASE ENTER A CHOICE: * Exclude => 'Char String' --or-- Perl regular expression - qr/.../ * * The *Exclude* element provides a means to remove matching elements from the Menu seen by the user. This element is useful only when the "]Convey[" macro is used to populate items. This can be done with two constructs - simple string or pre-compiled regular expression. Exclude => 'base|chown', Exclude => qr/base|chown/i, * Include => 'Char String' --or-- Perl regular expression - qr/.../ * * The *Include* element provides a means to create items filtered from a larger list of potential items available via the "]Convey[" macro. This element is useful only when the "]Convey[" macro is used to populate items. The "Exclude" element can be used in conjunction with "Include" to further refine the final list of items used to construct the menu. The "Include" element - when used - always takes presidence, and the "Exclude" will be used only on the "Include" filtered results. This element can be used with two value constructs - simple string or pre-compiled regular expression. Include => 'base|chown', Include => qr/base|chown/i, * Result => \%Menu_2 --or -- "&any_method()", * * *Result* is an *optional* element that also has two important uses: * For selecting the child menu next in the chain of operation and conveyance, Result => \%Menu_2, --or-- * For building customized method arguements using "&Menu()"'s built-in macros. * Result => "&any_method($arg1,\"]Selected[\",\"]Previous[\")", NOTE: *ALWAYS* be sure to surround the subroutine or method calling syntax with DOUBLE QUOTES. (You can use single quotes if you don't want interpolation). Quotes are necessary because you're telling "&Menu()" - *not* Perl - what method you want invoked. "&Menu()" won't invoke the method until after all other processing - where Perl will try to invoke it the first time it encounters the line during runtime - lo----ng before a user gets a chance to see or do *anything*. BUT - be sure *NOT* to use quotes when assigning a child menu reference to the "Result" value. Again, *Result* is an *optional* element. The default behavior when "Result" is omitted from the Item Configuration element, is for the selection to be returned to the "&Menu()"'s calling script/module/app. If the "Select" element was set to 'One', then that item is returned regardless of whether the Perl structure receiving the output is an array or scalar. If there were multiple selections - i.e., "Select" is set to 'Many' - then, depending on what structure is set for receiving the output, will determine whether "&Menu()" returns a list (i.e. - array), or *reference* to an array. Item Congfiguration Macros Each Menu Item can utilize a very powerful set of configuration *Macros*. These constructs principally act as purveyors of information - from one menu to another, from one element to another. There are currently three available Macros: * ]Convey[ * * "]Convey[" is used in conjunction with the *Convey* element (described) earlier. It's purpose to "convey" or transport or carry a list item associated with the "Convey" element - and replace the "]Convey[" Macro in the "Text" element value with that list item. The *Convey* mechanism utilizing the "Convey" Macro is essentially an *Item multiplier*. The entire contents of the list associated with the *Convey* element will be turned into it's own "Item" when the menu is displayed. use Term::Menus; my %Menu_1=( Label => 'Menu_1', Item_1 => { Text => "/bin/Utility - ]Convey[", Convey => [ `ls -1 /bin` ], Result => \%Menu_2, }, Select => 'One', Banner => "\n Choose a /bin Utility :" ); my @selections=&Menu(\%Menu_1); print "SELECTIONS=@selections\n"; The user sees ==> Choose a /bin Utility : 1. /bin Utility - arch 2. /bin Utility - ash 3. /bin Utility - awk 4. /bin Utility - basename 5. /bin Utility - bash 6. /bin Utility - cat 7. /bin Utility - chgrp 8. /bin Utility - chmod 9. /bin Utility - chown 10. /bin Utility - cp a. Select All. c. Clear All. f. Finish. 93 Total Choices Press ENTER (or "d") to scroll downward OR "u" to scroll upward (Press "q" to quit) PLEASE ENTER A CHOICE: NOTE: "]C[" can be used as a shorthand for "]Convey[". * ]Previous[ * * "]Previous[" can be used in child menus. The "]Previous[" Macro contains the *Selection* of the parent menu. Unlike the "]Convey[" Macro, the "]Previous[" Macro can be used in both the "Text" element value, and the "Result" element values (when constructing method calls): The "]Previous[" Macro can also be used in the Banner. use Term::Menus; my %Menu_2=( Label => 'Menu_2', Item_1 => { Text => "]Previous[ is a ]Convey[ Utility", Convey => [ 'Good','Bad' ] }, Select => 'One', Banner => "\n Choose an Answer :" ); my %Menu_1=( Label => 'Menu_1', Item_1 => { Text => "/bin/Utility - ]Convey[", Convey => [ `ls -1 /bin` ], Result => \%Menu_2, }, Select => 'One', Banner => "\n Choose a /bin Utility :" ); my @selections=&Menu(\%Menu_1); print "SELECTIONS=@selections\n"; The user sees ==> Choose a /bin Utility : 1. /bin Utility - arch 2. /bin Utility - ash 3. /bin Utility - awk 4. /bin Utility - basename 5. /bin Utility - bash 6. /bin Utility - cat 7. /bin Utility - chgrp 8. /bin Utility - chmod 9. /bin Utility - chown 10. /bin Utility - cp a. Select All. c. Clear All. f. Finish. 93 Total Choices Press ENTER (or "d") to scroll downward OR "u" to scroll upward (Press "q" to quit) PLEASE ENTER A CHOICE: --< 5 >----------------------------------- Choose an Answer : 1. bash is a Good Utility 2. bash is a Bad Utility (Press "q" to quit) PLEASE ENTER A CHOICE: --< 1 >----------------------------------- The user sees ==> SELECTIONS = bash is a Good Utility NOTE: "]P[" can be used as a shorthand for "]Previous[". * ]Previous[{ <*Menu_Label*> } * * "]Previous[{Menu_Label}" can be used in child menus. The "]Previous[{Menu_Label}" Macro contains the *Selection* of any preceding menu specified with the "Menu_Label" string. The "]Previous[{Menu_Label}" follows the same conventions as the "]Previous[" Macro - but enables access to the selection of i preceding menu. This is very useful for Menu trees more than two levels deep. The "]Previous[{Menu_Label}" Macro can also be used in the Banner. use Term::Menus; my %Menu_3=( Label => 'Menu_3', Item_1 => { Text => "]Convey[ said ]P[{Menu_1} is a ]Previous[ Utility!", Convey => [ 'Bob','Mary' ] }, Select => 'One', Banner => "\n Who commented on ]Previous[{Menu_1}? :" ); my %Menu_2=( Label => 'Menu_2', Item_1 => { Text => "]Previous[ is a ]C[ Utility", Convey => [ 'Good','Bad' ], Result => \%Menu_3, }, Select => 'One', Banner => "\n Is ]P[ Good or Bad? :" ); my %Menu_1=( Label => 'Menu_1', Item_1 => { Text => "/bin/Utility - ]Convey[", Convey => [ `ls -1 /bin` ], Result => \%Menu_2, }, Select => 'One', Banner => "\n Choose a /bin Utility :" ); my @selections=&Menu(\%Menu_1); print "SELECTIONS=@selections\n"; The user sees ==> Choose a /bin Utility : 1. /bin Utility - arch 2. /bin Utility - ash 3. /bin Utility - awk 4. /bin Utility - basename 5. /bin Utility - bash 6. /bin Utility - cat 7. /bin Utility - chgrp 8. /bin Utility - chmod 9. /bin Utility - chown 10. /bin Utility - cp PLEASE ENTER A CHOICE: --< 5 >----------------------------------- Is bash Good or Bad? : 1. bash is a Good Utility 2. bash is a Bad Utility (Press "q" to quit) PLEASE ENTER A CHOICE: --< 1 >----------------------------------- Who commented on bash? : 1. Bob said bash is a Good Utility! 2. Mary said bash is a Good Utility! (Press "q" to quit) PLEASE ENTER A CHOICE: --< 2 >----------------------------------- The user sees ==> SELECTIONS = Mary said bash is a Good Utility! NOTE: "]P[" can be used as a shorthand for "]Previous[". "]P[{Menu_Label}" can be used as a shorthand for "]Previous[{Menu_Label}". "]C[" can be used as a shorthand for "]Convey[". * ]Selected[ * * "]Selected[" can only be used in a *terminal* menu. ( *A terminal menu is the last menu in the chain, or the last menu the user sees. It is the menu that defines the* "Result" *element with a method* "Result => &any_method()", *or does not have a* "Result" *element included or defined.* ) "]Selected[" is used to pass the selection of the *current* menu to the "Result" element method of the current menu: use Term::Menus; sub selected { print "\n SELECTED ITEM = $_[0]\n" } my %Menu_1=( Label => 'Menu_1', Item_1 => { Text => "/bin/Utility - ]Convey[", Convey => [ `ls -1 /bin` ], Result => "&selected(]Selected[)", }, Select => 'One', Banner => "\n Choose a /bin Utility :" ); my @selections=&Menu(\%Menu_1); print "SELECTIONS=@selections\n"; NOTE: "]S[" can be used as a shorthand for "]Selected[". USAGE and NAVIGATION Usage of "&pick()" and/or "&Menu()" during the runtime of a script in which one or both are included, is simple and intuitive. Nearly everything the end user needs in terms of instruction is included on-screen. The script-writer/developer/programmer can also include whatever instructions s/he deems necessary and/or helpful in the customizable "Banner" (as described above). There is however, one important feature about using "&Menu()" with sub-menus that's important to know about. Forward ' > ' and Backward ' < ' Navigation When working with more than one "&Menu()" screen, it's valuable to know how to navigate back and forth between the different "&Menu()" levels/layers. For example, above was illustrated the output for two layers of menus - a parent and a child: The user sees ==> Choose a /bin Utility : 1. /bin Utility - arch 2. /bin Utility - ash 3. /bin Utility - awk 4. /bin Utility - basename 5. /bin Utility - bash 6. /bin Utility - cat 7. /bin Utility - chgrp 8. /bin Utility - chmod 9. /bin Utility - chown 10. /bin Utility - cp a. Select All. c. Clear All. f. Finish. 93 Total Choices Press ENTER (or "d") to scroll downward OR "u" to scroll upward (Press "q" to quit) PLEASE ENTER A CHOICE: --< 5 >----------------------------------- The user sees ==> Choose an Answer : 1. bash is a Good Utility 2. bash is a Bad Utility (Press "q" to quit) PLEASE ENTER A CHOICE: In the above example, suppose that the user "fat-fingered" his/her choice, and really didn't want to "bash" bash, but wanted to bash awk instead. Is restarting the whole script/application now necessary? Suppose it was a process that had run overnight, and the user is seeing this menu through fogged glasses from the steam rising out of their morning coffee? Having to run the whole job again would not be welcome news for the BOSS. THANKFULLY, navigation makes this situation avoidable. All the user would have to do is type ' < ' to go backward to the previous menu, and ' > ' to go forward to the next menu (assuming there is one in each case): The user sees ==> Choose an Answer : 1. bash is a Good Utility 2. bash is a Bad Utility (Press "q" to quit) PLEASE ENTER A CHOICE: --< > >------------------------------ The user sees ==> Choose a /bin Utility : 1. /bin Utility - arch 2. /bin Utility - ash 3. /bin Utility - awk 4. /bin Utility - basename - 5. /bin Utility - bash 6. /bin Utility - cat 7. /bin Utility - chgrp 8. /bin Utility - chmod 9. /bin Utility - chown 10. /bin Utility - cp a. Select All. c. Clear All. f. Finish. 93 Total Choices Press ENTER (or "d") to scroll downward OR "u" to scroll upward (Press "q" to quit) PLEASE ENTER A CHOICE: Note in the above example the Dash ' - ' in front of item 5. This informs the user that s/he had previously selected this item. To clear the selection, the user would simply choose item 5 again. This effectively deletes the previous choice and restores the menu for a new selection. If the user was satisfied with the choice, and was simply double checking thier selection, they simply repeat the navigation process by typing ' > ' - then - and returning to the child menu they left. If the child menu was a *multiple-selection* menu, and the user had made some selections before navigating back to the parent menu, the user would see a ' + ' rather than a ' - '. This informs the user that selections were made in the child menu. Choose a /bin Utility : 1. /bin Utility - arch 2. /bin Utility - ash 3. /bin Utility - awk 4. /bin Utility - basename + 5. /bin Utility - bash 6. /bin Utility - cat 7. /bin Utility - chgrp 8. /bin Utility - chmod 9. /bin Utility - chown 10. /bin Utility - cp a. Select All. c. Clear All. f. Finish. 93 Total Choices Press ENTER (or "d") to scroll downward OR "u" to scroll upward (Press "q" to quit) PLEASE ENTER A CHOICE: View Sorted Items ' % ' When working with numerous items in a single menu, it may be desirable to see the set of choices organized in either descending or reverse acscii order. Term::Menus provides this feature with the *Percent* ' % ' key. Simply type ' % ' and the items will be sorted in descending ascii order. Type ' % ' again, and you will see the items reverse sorted. Assume that we have the following menus. The user sees ==> Please select all files for immediate transfer: * 1. addr2name.awk has **NOT** been transferred * 2. awk.exe has **NOT** been transferred 3. gawk-3.1.4.exe has **NOT** been transferred * 4. gawk.exe has **NOT** been transferred 5. igawk has **NOT** been transferred 6. pgawk-3.1.4.exe has **NOT** been transferred 7. pgawk.exe has **NOT** been transferred * 8. 822-date has been transferred 9. DllPlugInTester.exe has been transferred * 10. ELFDump.exe has been transferred a. Select All. c. Clear All. f. Finish. 929 Total Choices Press ENTER (or "d") to scroll downward OR "u" to scroll upward (Press "q" to quit) PLEASE ENTER A CHOICE: --< % >----------------------------------- The user sees ==> Please select all files for immediate transfer: * 8. 822-date has been transferred 9. DllPlugInTester.exe has been transferred * 10. ELFDump.exe has been transferred 11. GraphicsMagick++-config has been transferred 12. GraphicsMagick-config has been transferred 13. X11 has been transferred 14. [.exe has been transferred 15. a2p.exe has been transferred 16. aclocal has been transferred 17. aclocal-1.4 has been transferred a. Select All. c. Clear All. f. Finish. 929 Total Choices Press ENTER (or "d") to scroll downward OR "u" to scroll upward (Press "q" to quit) PLEASE ENTER A CHOICE: And if we choose to enter ' % ' *again* --< % >----------------------------------- The user sees ==> Please select all files for immediate transfer: 929. znew has been transferred 928. zmore has been transferred 927. zless has been transferred 926. zipsplit.exe has been transferred 925. zipnote.exe has been transferred 924. zipinfo has been transferred 923. zipgrep has been transferred 922. zipcloak.exe has been transferred 921. zip.exe has been transferred 920. zgrep has been transferred a. Select All. c. Clear All. f. Finish. 929 Total Choices Press ENTER (or "d") to scroll downward OR "u" to scroll upward (Press "q" to quit) PLEASE ENTER A CHOICE: This submenu of selections works just like any other menu. The user can deselect an item, clear all items, re-choose all items, etc. The choices made here are preserved when-or-if the user navigates back to the original (parent) menu. In other words, if Item 1. is deselected in the sorted menu, Item 1. will also be deselected in the parent menu above. View Summary of Selected Items ' * ' When working with numerous items in a single menu, it is desirable to see the set of choices made before leaving the menu and committing to a non-returnable forward (perhaps even critical) process. Term::Menus provides this feature with the *Star* ' * ' key. Assume we have the following menu with 93 Total Choices. Assume further that we have selected items 1,3,9 & 11. Note that we cannot see Item 11 on the first screen since this menu is configured to show only 10 Items at a time. The user sees ==> Choose a /bin Utility : * 1. /bin Utility - arch 2. /bin Utility - ash * 3. /bin Utility - awk 4. /bin Utility - basename 5. /bin Utility - bash 6. /bin Utility - cat 7. /bin Utility - chgrp 8. /bin Utility - chmod * 9. /bin Utility - chown 10. /bin Utility - cp a. Select All. c. Clear All. f. Finish. 93 Total Choices Press ENTER (or "d") to scroll downward OR "u" to scroll upward (Press "q" to quit) PLEASE ENTER A CHOICE: --< * >----------------------------------- The user sees ==> Choose a /bin Utility : * 1. /bin Utility - arch * 3. /bin Utility - awk * 9. /bin Utility - chown * 11. /bin Utility - cpio (Press "q" to quit) PLEASE ENTER A CHOICE: This submenu of selections works just like any other menu. The user can deselect an item, clear all items, re-choose all items, etc. The choices made here are preserved when-or-if the user navigates back to the original (parent) menu. In other words, if Item 1. is deselected in the summary menu, Item 1. will also be deselected in the parent menu above. EXAMPLES AUTHOR Brian M. Kelly COPYRIGHT Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Brian M. Kelly. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License. (http://www.opensource.org/licenses/gpl-license.php).