- 
To be implemented by any display working with the 
 Zoomer class.
 
Class for handling multiple zoom and marked areas on a
 display.
 
Interface to support a variety of zoomable shapes.
 
 
 
- 
To be implemented by any display working with the 
 Zoomer class.
 
Interface to support a variety of zoomable shapes.
 
 
 
- 
To be implemented by any display working with the 
 Zoomer class.
 
Class for handling multiple zoom and marked areas on a
 display.
 
Interface to support a variety of zoomable shapes.