ctkCallback

CTKCallback is a powerful Perl module that collects various methods specifically designed for callbacks. It provides users with four distinct properties: user_methods, callbacks, subroutineNames, and allCallbackNames. Each of these properties returns an array or reference to an array (depending on the context) to meet different user requirements.

CTKCallback also comes with clear properties such as clearSubroutineNames, clearCallbacks, and clearUser_methods to ensure complete flexibility and ease of use. Additionally, the checkCallbackOption method allows users to check the validity of their entered callback code, supporting four different formats including format 1 (callback), format 2 ([&callback, args]), format 4 (['callback', args]), and format 8 (sub {codeblock}).

As for the arguments, users can pass a string containing the callback code and get a format number for the recognized code, or 'undef' if the code is unrecognized. Finally, the callback method in CTKCallback handles the command event during a ClickTk session. It gets called when users click on a widget in the preview and prevents the application's callback (specified in the widget option) from getting called.

Overall, CTKCallback is a must-have for any software developer looking for reliable and efficient tools for implementing callbacks in their code.