[Bug 108027] New view objects for annotating and drawing

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http://bugs.kde.org/show_bug.cgi?id=108027         




------- Additional Comments From nicolas.brisset eurocopter com  2005-07-22 
11:41 -------
IMPORTANT NOTICE regarding fixed plot coordinates or data coordinates:
(I know this had been discussed previously in bug #91675 but I believe it is 
important enough to be repeated here).

As Andrew pointed out, annotating a plot in fixed data coordinates raises the 
issue of updates: <quote>the updating would have to be paused while annotating 
else whatever you're adding is liable to vanish from the plot while you're 
adding it (ditto for editing an already existing object)</quote>

Even though Andrew continued saying that data markers provide the same 
functionality, I believe data markers are a bit simplistic for annotation 
purposes. For that reason, it would ne nice to provide an option making view 
objects fixed in data coordinates. I think the default could be plot 
coordinates. As for the update problem, it could easily be fixed by pausing 
updates as soon as the user switches to "annotation mode" (Graphics editor). It 
is very easy to reactivate updates once the annotations are done or zoom mode 
is activated, and no data gets lost in the process.