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http://www.openoffice.org/issues/show_bug.cgi?id=74653





------- Additional comments from [EMAIL PROTECTED] Wed Feb 21 09:39:06 +0000 
2007 -------
Aaaargh! Why does this work in the old chart!

If we want to fix this, we would have to change the whole Undo-Concept. This
issue comes a bit late for being able to change this in a timely manner.

Undo is currently done by the controller. When you leave the inplace-mode the
controller is destroyed. Therefore Undo-information is lost. To keep the undo
information, we would have to store the undo at the model. Which, by the way,
only works as long as a chart is not swapped out of memory due to the "OLE
cache" limitation or a switch to another sheet.

The problem with an undo that survives the leaving of the outplace mode is, that
changes done in Calc may influence the chart, rendering a later undo useless.
For illustration, in the old chart create a chart out of three columns of data.
Change some properties of the last series, go back to calc and delete the last
column (that serves the data for that series). => The series will disappear. Now
enter the chart and do an "Undo" => Nothing happens (fortunately there is no
crash :-) ), because the object the undo works for no longer exists. As long as
we have no merged undo (between Calc and Chart), I don't know how much sense in
a remembered Undo-Stack makes, anyway.

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