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.