The following sections discuss Swing’s border classes in detail.
bevel is another name for a slanted edge. The
BevelBorder class can be used to simulate a raised
or lowered edge with a slant surrounding the component, similar to
the appearance of a button. The default bevel edge is two pixels wide
on all sides. Figure 13.4 shows two bevel borders,
the first raised and the second lowered.
Figure 13-4. Raised and lowered bevel borders
Notice how the border creates the illusion of three dimensions. Like many components, the bevel border simulates a light source above and to the left of the object. The border is then drawn with four colors: an outer and inner highlight color, and an outer and inner shadow color. The highlight colors represent the two surfaces of the bevel facing toward the light, while the shadow colors represent the surfaces facing away from the light. Figure 13.5 shows how a bevel border uses the highlight and shadow colors.
Figure 13-5. The four colors of a bevel border
When the bevel is raised, the top and left sides of the border are highlighted and the bottom and right sides of the border are shadowed. This presents the appearance of the surface protruding above the background. When the bevel is lowered, the ...