Part of   Helix

SStructView 1.1

Overview

We have developed a Java applet to display interactive Secondary Structures. The applet retrieves the secondary structure from a URL, displays it in a Web page, and responds to user interaction by identifying which objects the user clicked on and optionally calling a URL in response. The applet supports several levels of zooming and uses offscreen imaging for optimized performance. Java's virtual machine architecture allows the SStructView to be integrated into WWW pages and run on a number of different platforms.

New features in version 1.1

• New file format allows users to create new concepts by defining sets of related bases. For example, you can create a new concept called ARTICLE that groups all the bases that are described in a particular publication.
• Selections can be restricted to a particular data type (e.g. only select base-pairs or helices).
• Certain bases can be permanently flagged and drawn in reverse video.
• Selection data accessible from JavaScript.
• Various performance improvements, incl. 30% decrease in drawing time.

Availability

SStructView 1.1 was released in August 1996. To obtain the Java class files, do the following:

1. Read the licensing agreement.
2. Download the zip archive.

Java source files for SStructView 1.1 are not available at this time.

Support Pages

• Tutorial including Javascript tutorial.
• Technical Documentation for the new version.

Demos

These demos show how SStructView can be linked to CGIs on the web. The first three examples all use NCBI's BLAST search engine as the demo CGI.

• BLAST basic demonstrates the easiest way to link SStructView to a CGI using the ActionURL.
• BLAST with JavaScript demonstrates how to use JavaScript to embed SStructView in a form.
• BLAST, RDP and MedLine (version for small screens) demonstrates how to use Frames and JavaScript to link a single SStructView applet to several CGIs.