A graphic object is an object that users
can view on their screen.
When you display a graphic object, you associate its coordinates
with the coordinate system of a particular graphic
bag.
A graphic bag is an interface that describes the methods to be
implemented by a class that contains several graphic objects. An
example of a graphic bag is the class
IlvManager
, which can manage a large number of graphic objects. For more
information see Managers.
Every graphic object has an x value, a y value, and dimensions
(that is, width and height). The x and y values define the
upper-left corner of the graphic object’s bounding
box, which is the smallest rectangle containing the entire area
of the object. You define the exact shapes of graphic objects in
your Rogue Wave® JViews-based programs and then build them using
various drawing methods. Other methods provide you with
information about your graphic objects and let you carry out
geometric tests concerning the shapes that you are using. For
example, you can check whether or not a point with given
coordinates lies inside a certain object form.