graphical editors

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1 total messages Started by k... Ken Yap Sun, 18 Feb 1990 21:41

#1399

Author: k... Ken Yap
Date: Sun, 18 Feb 1990 21:41

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Some time ago my friend called me over to his workstation: Ken, I'm
having problems deleting objects in this graphical editor. I poked
around a little and discovered that he had dozens of copies of the
same box in memory. What had happened was that he had invoked the Read
File function many times, expecting the objects in memory to be
replaced, when new copies were being added.  No wonder it took ages to
redisplay the picture.

Now you may say perhaps the Read File function should be renamed Merge
File and I'll agree, but to me this incident highlights the non-linear
nature of graphical data (two objects can occupy the same position).

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