ScaleTool - tool for rotating components

SYNOPSIS

       #include <Unidraw/Tools/scale.h>

DESCRIPTION

       ScaleTool lets the user rotate components by direct manip-
       ulation.

PUBLIC OPERATIONS

       ScaleTool(ControlInfo* = nil)
              Create a new ScaleTool.

       virtual Manipulator* CreateManipulator(
          Viewer*, Event&, Transformer*
       )

       virtual void InterpretManipulator(Manipulator*)
              CreateManipulator detects whether the user  clicked
              on  a  component.   If  not, it clears the editor's
              selection and returns a nil manipulator.  If a com-
              ponent was hit, and if the component was not previ-
              ously selected, then CreateManipulator  clears  the
              editor's  selection, selects the component the user
              hit, and delegates manipulator creation and  inter-
              pretation  to  it.   If  the component was the only
              selected component, it again delegates  manipulator
              creation  and  interpretation to the component, but
              the selection is unaltered.  If the user clicks  on
              one of many selected components, then CreateManipu-
              lator will delegate manipulator creation and inter-
              pretation to the hit component without altering the
              selection.

SEE ALSO

       Tool(3U)