Implementing level 4 liveness in declarative visual programming languages

被引：17

作者：

Burnett, MM ^{[1
]}

Atwood, JW ^{[1
]}

Welch, ZT ^{[1
]}

机构：

[1] Oregon State Univ, Dept Comp Sci, Corvallis, OR 97331 USA

来源：

1998 IEEE SYMPOSIUM ON VISUAL LANGUAGES, PROCEEDINGS | 1998年

关键词：

D O I：

10.1109/VL.1998.706155

中图分类号：

TP31 [计算机软件];

学科分类号：

081202 ; 0835 ;

摘要：

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. In this paper, 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.

引用

页码：126 / 133

页数：8