| A Command in uDig describes an action that modifies the system's model.
Commands are single fire objects. They cannot be used more than once. This is to allow undoable
commands to be a normal command, not a special case command.
Commands normally have factories associated with them, but they are also prototypes. The copy
method returns a new Command without the undo data. The new Command can safely be executed with
no negative side-effects.
See Also: net.refractions.udig.project.command.factory.NavigationCommandFactory
See Also: A set of possible command
See Also: categories are: zoom, pan, cut, paste, addVertex, etc.. Most commands are associated with
See Also: tool whose job is to construct the commands. A Command object describes an concrete change,
See Also: for example: setBBox(0,0,1,1); setBBox(2,2,3,3) would be a seperate object.
author:
jeichar |