Tool for magnifying a portion of the graphicview displayed in a viewer
#include <Unidraw/Tools/magnify.h>
MagnifyTool lets the user magnify a portion a viewer's contents. The user sweeps out a rectangular area with the MagnifyTool, and the viewer will magnify the area to occupy the entire screen, if possible.
MagnifyTool(ControlInfo* = nil)
Instantiate a MagnifyTool.
virtual Manipulator* CreateManipulator(
Viewer*, Event&, Transformer*
)
virtual void InterpretManipulator(Manipulator*)
CreateManipulator generates a DragManip with a RubberRect to provide visual feedback for specifying the rectangular area to be magnified. InterpretManipulator does not create a command; rather, it examines the DragManipulator's RubberRect and calls Magnify on the viewer with the RubberRect's final coordinates.
Rubband(3I), Tool(3U), Viewer(3U), manips(3U)