@Unpublished{,

   author = 	 {Nebojsa Simic},

   title = 	 {A GUI-Component for Interactive Construction of Calculations},

   note = 	 {Seminar-Project at TU Graz, Institute for Softwaretechnology},

   month = 	 {October},

   year = 	 {2006}

 }

 \abstract{

 ISAC is a transparent single-stepping system for applied mathematics. This paper

 contains the description about the last development phase of the Worksheet - the 

 center of user interaction in the ISAC system. 

 The assignment of this Seminar-Project was to create a GUI component that will 

 serve as the Presentation Layer for the calculations performed by the mathematics

 engine. This component is called 'Worksheet'.

 The Worksheet visualises the Calculation Tree stored in the SML Kernel of the 

 system and enables the user to effectively manipulate the single entries in this 

 tree. Additionally, this component defines the User Interface on a lexical level,

 by specifying placement and look-and-feel of widgets, but without knowing their 

 meaning.

 The first part of the Seminar-Project deals with the architectural considerations

 of the design, whereas the second part is based mainly on the implementation 

 issues.

 }