The manager allows you to highlight objects when the
pointer hovers on top of them.
To display highlighted objects within a manager, the
manager creates specific images that are drawn on top of the selected
objects as a highlighting effect. By default, hover highlighting is
not enabled. If you want to activate it, you need first to decide
what highlighting effect you want to use.
The images used as highlighting effects are transient
Java 2D™
artifacts, they are internally
managed and cannot be manipulated.
Each effect is applied through a Java 2D image operation
on the regular object representation, and then displayed on top of
all the objects with a set opacity.
The manager provides 5 predefined effects:
Invert colors: This changes the intensity
of each color component (red, green, blue). For example, a red object
will be highlighted with a yellow color.
Blur: The highlighted object becomes
blurred.
Brighten: Every color used when drawing
the object becomes brighter. This may have no effect on objects that
are already very bright.
Gray scale: The colors of the object
are converted into tones of grays.
Sharpen: the borders of the object are
accentuated.
None: to remove the hover highlight
effect.