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Top Forums Shell Programming and Scripting Help me with this Shell Program Post 19189 by TRUEST on Sunday 7th of April 2002 02:11:51 PM
Old 04-07-2002
Help me with this Shell Program

Now, am in a very tight situation here. I really dont expect anyone to understand but please, try your best.

am trying to right a program that goes back to the previous entry to correct a mistake.

heres what am trying to do. i write a program like this

Name : James Holgston
Address : -
Phone :

now, after the user enters a name for the name field and the cursor is now in the address field, how do I make the cursor go back to the name field and erase the previous entry to allow the user to enter a new entry. I was basically able to return the cursor the the previous field but I couldn't figure out how to clear the previous field. all i was able to do was bring the cursor up to the first letter of the previous field but was not able to delete the entire entry automatically.

say, after I entered James Holgston and now the cursor is blinking on the Address field, how do I go back to the field where James Holgston is and delete that name upon the arrival of the cursor.

is there any hack I can add to my script??

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CPANPLUS::Shell::Default::Plugins::HOWTO(3pm)		 Perl Programmers Reference Guide	     CPANPLUS::Shell::Default::Plugins::HOWTO(3pm)

CPANPLUS::Shell::Default::Plugins::HOWTO -- documentation on how to write your own plugins SYNOPSIS
package CPANPLUS::Shell::Default::Plugins::MyPlugin; ### return command => method mapping sub plugins { ( myplugin1 => 'mp1', myplugin2 => 'mp2' ) } ### method called when the command '/myplugin1' is issued sub mp1 { .... } ### method called when the command '/? myplugin1' is issued sub mp1_help { return "Help Text" } DESCRIPTION
This pod text explains how to write your own plugins for "CPANPLUS::Shell::Default". HOWTO
Registering Plugin Modules Plugins are detected by using "Module::Pluggable". Every module in the "CPANPLUS::Shell::Default::Plugins::*" namespace is considered a plugin, and is attempted to be loaded. Therefor, any plugin must be declared in that namespace, in a corresponding ".pm" file. Registering Plugin Commands To register any plugin commands, a list of key value pairs must be returned by a "plugins" method in your package. The keys are the commands you wish to register, the values are the methods in the plugin package you wish to have called when the command is issued. For example, a simple 'Hello, World!' plugin: package CPANPLUS::Shell::Default::Plugins::HW; sub plugins { return ( helloworld => 'hw' ) }; sub hw { print "Hello, world! " } When the user in the default shell now issues the "/helloworld" command, this command will be dispatched to the plugin, and its "hw" method will be called Registering Plugin Help To provide usage information for your plugin, the user of the default shell can type "/? PLUGIN_COMMAND". In that case, the function "PLUGIN_COMMAND_help" will be called in your plugin package. For example, extending the above example, when a user calls "/? helloworld", the function "hw_help" will be called, which might look like this: sub hw_help { " /helloworld # prints "Hello, world! " } If you dont provide a corresponding _help function to your commands, the default shell will handle it gracefully, but the user will be stuck without usage information on your commands, so it's considered undesirable to omit the help functions. Arguments to Plugin Commands Any plugin function will receive the following arguments when called, which are all positional: Classname -- The name of your plugin class Shell -- The CPANPLUS::Shell::Default object Backend -- The CPANPLUS::Backend object Command -- The command issued by the user Input -- The input string from the user Options -- A hashref of options provided by the user For example, the following command: /helloworld bob --nofoo --bar=2 joe Would yield the following arguments: sub hw { my $class = shift; # CPANPLUS::Shell::Default::Plugins::HW my $shell = shift; # CPANPLUS::Shell::Default object my $cb = shift; # CPANPLUS::Backend object my $cmd = shift; # 'helloworld' my $input = shift; # 'bob joe' my $opts = shift; # { foo => 0, bar => 2 } .... } BUG REPORTS
Please report bugs or other issues to <bug-cpanplus@rt.cpan.org<gt>. AUTHOR
This module by Jos Boumans <kane@cpan.org>. COPYRIGHT
The CPAN++ interface (of which this module is a part of) is copyright (c) 2001 - 2007, Jos Boumans <kane@cpan.org>. All rights reserved. This library is free software; you may redistribute and/or modify it under the same terms as Perl itself. SEE ALSO
CPANPLUS::Shell::Default, CPANPLUS::Shell, cpanp perl v5.18.2 2014-01-06 CPANPLUS::Shell::Default::Plugins::HOWTO(3pm)

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