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revision 1.155 by tjl, Sat Feb 15 21:20:02 2003 UTC revision 1.156 by tjl, Sat Feb 15 21:30:20 2003 UTC
# Line 223  three simple principles [XXXrefs???]: Line 223  three simple principles [XXXrefs???]:
223    "you should see how you go there"    "you should see how you go there"
224    
225  - the link transition and resulting view should make it obvious to the user how  - the link transition and resulting view should make it obvious to the user how
226    to go back, without a "back button" [implies bidirectional links]    to go back, without an explicit back button [implies bidirectional links]
227    "once you get there, you should see how you can get back".    "once you get there, you should see how you can get back".
228    
229  There is one scrollable focus node ("current document"),  Let us start form
230  and links  one scrollable node ("current document").
231    To be able to show all the link targets near the anchors,
 To be able to show all the link targets near the focus,  
232  only the *relevant fragments* (the immediate surroundings of the other  only the *relevant fragments* (the immediate surroundings of the other
233  end of the link) of the target nodes are shown.  end of the link) of the target nodes are shown.
234  The images of the link targets "float" near the anchors,  The images of the link targets "float" near the anchors,
# Line 237  which is why we call them *buoys*. Line 236  which is why we call them *buoys*.
236  When traversing a link by clicking a buoy, the buoy expands to become the main view, and  When traversing a link by clicking a buoy, the buoy expands to become the main view, and
237  the main view shrinks to a buoy.  the main view shrinks to a buoy.
238    
 Therefore, we must be able to fluidly animate a fragment to  
 a whole document.  
   
239  Fragments of different documents can look very similar,  Fragments of different documents can look very similar,
240  especially preattentively ("at-a-glance").  especially preattentively ("at-a-glance") [ XXX ref ].
241  In order to let the user perceive the source of the fragment,  In order to let the user perceive the source of the fragment,
242  we texture each node with a unique background texture  we texture each node with a unique background texture
243  produced procedurally from the identity of the node.  generated procedurally from the identity of the node.
   
 Of the techniques presented here, only the  
 fisheye view seems to have been used  
 prior to this work in the hypertext context (XXX two papers in review process)  
244    
245  In the following subsections, we discuss the details  In the following subsections, we discuss the details
246  of the main components of the interface: buoy placement, unique backgrounds,  of the main components of the interface: buoy placement, unique backgrounds,

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