Volume 6A: Motif Programming Manual

that are specific to these objects.

Frame

The purpose of the Frame widget is to provide a visible, three−dimensional border for objects such as

RowColumns or Labels that do not provide a border for themselves. In Motif 1.2, the Frame widget may have

two children: a work area child and a label child. With Motif 1.1, the Frame widget may have only one child.

In either case, the Frame sizes itself just big enough to contain its children.

PanedWindow

The PanedWindow manages its children in a vertically−tiled format. The widget takes its width from the

widest widget in its list of children. The PanedWindow also provides control sashes or grips that enable the

user to adjust the individual heights of the PanedWindow's children. Constraint resources for the

PanedWindow allow each child to specify its desired maximum and minimum height and whether it may be

resized.

DrawingArea

Although the DrawingArea widget is subclassed from the Manager widget class, it is not generally used in the

way that conventional managers are used. The widget does not do any drawing and it doesn't define any

keyboard or mouse behavior, although it does provide callbacks for user input. It is basically a free−form

widget that can be used for application−specific purposes. The widget provides callback resources to handle

keyboard, mouse, exposure, and resize events. While the DrawingArea widget can have children, it does not

manage them in any defined way. Since the DrawingArea widget is typically used for drawing, rather than ...