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.