Implementing level 4 liveness in declarative visual programming languages

Author

Burnett, Margaret M. ; Atwood, John W., Jr. ; Welch, Zachary T.

Author_Institution

Dept. of Comput. Sci., Oregon State Univ., Corvallis, OR, USA

fYear

1998

fDate

1-4 Sep 1998

Firstpage

126

Lastpage

133

Abstract

An increasingly common characteristic in visual programming languages (VPLs) is level 4 liveness-the constant monitoring of the system state with continuous redisplay as events arrive and computations progress. However, level 4 liveness can be expensive. We present an implementation method that supports level 4 liveness in declarative VPLs, ensuring without “unreasonable” cost that all values on the screen are correctly updated as computations progress. The method is especially well suited for the growing class of declarative VPLs that display continuously time varying calculations and graphics, such as GUI specification VPLs, event based or reactive VPLs, scientific visualization VPLs, or graphical simulation VPLs

Keywords

data visualisation; graphical user interfaces; visual languages; visual programming; GUI specification VPLs; constant monitoring; continuous redisplay; continuously time varying calculations; declarative VPLs; declarative visual programming languages; graphical simulation VPLs; implementation method; level 4 liveness; reactive VPLs; scientific visualization VPLs; Clocks; Computational modeling; Computer displays; Computer languages; Computer science; Computerized monitoring; Costs; Feedback; Graphical user interfaces; Visualization;

fLanguage

English

Publisher

ieee

Conference_Titel

Visual Languages, 1998. Proceedings. 1998 IEEE Symposium on

Conference_Location

Halifax, NS

ISSN

1049-2615

Print_ISBN

0-8186-8712-6

Type

conf

DOI

10.1109/VL.1998.706155

Filename

706155