With respect to the now well established 2.x versions there are only few changes visible to the average user. However, the architecture and configuration have ben dramatically changed. Most 2.x versions ported without any problems. Please report any problems if they occur.

Most changes are be backward compatible, and do not require any changes to your code. An exception is the use of "action", which was considered to be a misleading name by many hush users. As a result the kit::action() member function is renamed to kit::bind(), and the class action is renamed to class binding.

However, the most important change is the new automatic garbage collection policy for widgets: All widgets will be DELETED AUTOMATICALLY by their parent widget. To anticipate the installation of the new version, you are advised to remove all delete statements which are used to delete widgets (except for top level widgets).

Other improvements:

  - hush compiles with g++ -Wall flag to facilitate debugging
  handler::_register function for implicit garbage collection
  Known bugs in <hush/list.h> and <hush/dictionary> fixed
  kit::eval(cmd) generates error messages if cmd evaluates to false
  Many memory leaks fixed
  Automatic administration of creation/deletion of hush objects
  

Below, you'll find a list of changes wrt. the 1.x versions of hush.

      '<-'   means  'replaces'
  

In all classes containing an installhandler(...) member function:

    bind(...) <- installhandler(...)
  

    void session::prelude() <-  void session::prelude(kit,int,char**)
    int session::main() <- void session::main(kit,int,char**)
  
  

The class action has been renamed into binding. Also the functions action and _bind have been eliminated from the kit.

    binding* bind(..)  <- class action* action(...) 
  

The dispatch function of handler has been modified to allow for other kinds of events, in addition to Tcl and X events.

    int handler::dispatch(event*) <- int handler::dispatch(kit*,int,char**)
  

    int argc = _event->argc(); char** argv = _event->argv();
  

    void widget::alias(widget*)
  

Usage:

       widget* root = frame(path());     
 create outer widget


   
       widget* c = new whatever(root,".c",options); 
 inner widget


  
       c->pack();                         
 pack inner widget


   
       redirect( c );                     
 redirect to inner component


       alias( this );                     
 alias this !                     


  
  

Apart from the api/hush/ and api/widgets/ directories, there is alos the ap/dv/ directory which contains (at the moment) all Tcl/Tk related stuff.

There is a problem with items. It seems that the bind function for items does not work correctly.