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Plug and Play Scientific Graphics with SGT

The Scientific Graphics Toolkit (SGT) is a collection of Java classes that enables the creation of scientific 2D graphics. This article explores the use of SGT JavaBeans to create easy-to-use graphics with customizable appearance.

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Plug and Play Scientific Graphics with SGT

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  1. Plug and Play Scientific Graphics with SGT Donald DenboNOAA/PMEL-UW/JISAO http://www.epic.noaa.gov/java/sgt

  2. Introduction • The Scientific Graphics Toolkit (SGT) is a collection of Java classes to produce scientific 2D graphics. • SGT is a flexible system, allowing developers to produce custom graphics. • SGT, while popular, does require an expert programmer to use it effectively. 19th IIPS, Long Beach, CA

  3. Goals for Plug n’ Play Graphics • Create easy-to-use JavaBeans from the SGT classes. • JavaBeans will enable beginner and intermediate developers a quick entry into SGT graphics. • SGT Beans will handle most events and provide tools to easily customize the appearance of the plot. 19th IIPS, Long Beach, CA

  4. Why JavaBeans? • Provide component technology for Java. Components enhance re-usability in the Java environment. • Can easily be used in IDE and RAD environments. • Bean Customizers can be developed to work within IDE and RAD tools. • Beans provide a standard mechanism to interact with development tools and simplify access to complicated Java class libraries. • Beans have an object persistence mechanism. (XML serialization) 19th IIPS, Long Beach, CA

  5. Java Development Tools • BeanBuilderAvailable free from Sun Microsystems for JVM 1.4 or later • Java Integrated Development Environments (JBuilder, Eclipse, NetBeans) 19th IIPS, Long Beach, CA

  6. BeanBuilder Event Connection Component Layout 19th IIPS, Long Beach, CA

  7. SGT JavaBeans 19th IIPS, Long Beach, CA

  8. Design Page 19th IIPS, Long Beach, CA

  9. Page JavaBean • Visual JavaBean. Page can be added to any swing container. • Page can have any number of Panels placed inside it. Each Panel provides an independent graphical display of data from the DataModel. • The location and size of the Panels are specified in the PanelModel. 19th IIPS, Long Beach, CA

  10. PanelModel JavaBean • Non-visual JavaBean. • PanelModel maintains: • location and size of Panels on Page • AxisGroups and their positions on a Panel • Legend position on a Panel • Titles and annotation positions on a Panel 19th IIPS, Long Beach, CA

  11. DataModel JavaBean • Non-visual JavaBean. • DataModel uses information from the PanelModel to specify the connection between data and Panel/AxisGroup. • Contains the SGTData and Attribute objects. 19th IIPS, Long Beach, CA

  12. Real World Example ncReader • User opens ncReader and selects a netCDF file. • ncReader accesses the PanelModel to generate a list of Panel/AxisGroups. • User selects which Panel/AxisGroup the data subset should be attached. • ncReader adds the data with the Panel/AxisGroup information to the DataModel. data DataModel Page PanelModel 19th IIPS, Long Beach, CA

  13. Future Directions • Implementation has just begun. • Beta version of SGT with JavaBeans will be made available once an initial implementation of the Page, PanelModel, DataModel, and Customizer are complete. • User feedback will help guide additional development. http://www.epic.noaa.gov/java/sgt 19th IIPS, Long Beach, CA

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