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Demo of Grappa
(JDK 1.5+ Version)

To operate the demo, use your mouse to select, add or delete nodes and edges to the graph below or modify the graph description using dot format in the text area at the bottom of the java applet area below. Use the left mouse button on an item to select it. Use the shift key with the left mouse button to create a node. Use the shift key with the left mouse button in an existing node and drag to another existing node and a new edge will be created when you release the mouse button. Use the left mouse button and drag the mouse to select a group of elements. The right mouse button provides a menu of possible actions. Note that allowing the cursor to pause over an element for a few seconds brings up some additional information about the element.

In the text area, position the input cursor by clicking the mouse, then type your input in the dot format. There is no need to include position or sizing information as the dot layout engine will do that for you. For example, try adding the following in the text area:

Node0 -> Node4;

When you are done with your input, either press the submit graph or the submit text button depending on where you made your changes. Your graph description will be passed to the dot layout engine and then returned to Grappa to be rendered in the Java canvas and text areas below.

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For more information about Grappa contact John Mocenigo