9. X Toolkit   

The X Toolkit is made up of two distinct pieces, the Xt Intrinsics and a widget set - the Athena widget set which is a sample implementation of a widget set built upon the Intrinsics.

The following topics are discussed:

       Intrinsic Library -Xt  
       Intrinsic Widget Library -Xaw  
       Terminology  
       Underlying Model  
       Input Focus  
       Using Widgets  
       Initializing the Toolkit  
       Creating a Widget   
       Common Resources  
       Resource Conversions  
       Realizing a Widget  
       Processing Events  
       Your first Xt Program!!  
       Standard Widget Manipulation Functions  
       Mapping Widgets  
       Destroying Widgets  
       Retrieving Widget Resource Values  
       Modifying Widget Resource Values  
       Your second Xt Program!!  
       Using the Client Callback Interface  
       Your third Xt Program!!  
       Changing Resource Values  
       Specifying Resources  
       Your fourth Xt Program!!  
       Creating Argument Lists  

9.26. Example Programs   

The best way to understand how to use any programming library is by trying some simple examples. A collection of example programs that introduces each of the widgets in that Athena widget set, as well as many important toolkit programming concepts, is available in the X11R5 release as distributed by MIT. It can be found in the directory

                      /usr/units/Xaw

                       /usr/units/Xt