Ticket #9 (closed enhancement: fixed)

New selection indicator scheme: Change the color of the selected object to yellow and highlight the outline of the object with a thicker, translucent yellow band.

Have tested this method for OverlayNodedObjects using a UnionSet of Gridded2DSets (translucent rectangles, alpha=.15) for each line segment in a noded object. The separate rectangles appear continuous if the width of the rectangles is small on screen. Looks better for Polylines than for Freeforms, but still an improvement over the yellow grid. In the future would like to use one continuous Gridded2DSet that matches the contour of the nodes, but need to devise an algorithm to calculate the grid points that doesn't create "bow-tie" boxes or automatically detects and removes them.

Going to make selection grids of other overlay types (boxes, etc) match this glowing/highlighted look. Should be possible to achieve using continuous Gridded2DSets rather than union sets for the Box, Marker, Line, and Arrow. I'm less sure what to do about the oval and furthermore, the 'filled' cases of all of these objects. For text objects, I will probably just overlay a translucent yellow box corresponding to the bounding box of the object.

Completed basic selection layers for all overlay types. Would like to improve selection layers to the following types:

• Line -- make the selection layer extend past the ends of the line (easy)
• Noded Objects (freeforms and polylines) -- improve the method of determining the shape and orientation of the segments of the selection layer. Using trapezoids, should be able to eliminate all gaps in the layer and some of the overlapping parts (medium)
• Oval -- make the selection layer hollow; it currently covers the entire interior of the oval (hard)

• Oval -- make the selection layer hollow; it currently covers the entire interior of the oval (hard)

Decided to leave Ovals and Boxes solid, not hollow, since a box or oval can be selected by clicking in its interior.

This remains the only outstanding problem in this ticket:

• Noded Objects (freeforms and polylines) -- improve the method of determining the shape and orientation of the segments of the selection layer. Using trapezoids, should be able to eliminate all gaps in the layer and some of the overlapping parts (medium)

Employed trapezoids for OverlayUtil.getNodedLayer(). Required a fair amount of code (added many vector math methods to MathUtil.java as a result). Method currently does not detect all invalid sets itself, relying instead on VisAD's Gridded2DSet constructor to throw an exception when the set won't work.

Also added the overlay test data used to expose bugs in the method see Changeset r2909