作者: Gordon P. Kurtenbach , Thomas P. Moran , Melle William J. Van , Patrick Chiu
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摘要: A system for creating and manipulating groups of graphic objects using enclosures. persistent object, such as a closed loop is drawn around set an enclosure. When the enclosure selected within are grouped. Besides moving into out enclosure, contents group can then be modified by 1) graphically altering to include or remove objects, 2) fusing one them so that their loops overlap (i.e., they "fuse" one), 3) through gestures which "touch" fused 4) splitting multiple gesture.