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+--- Thread: UndoChanges when dragging, creating art (/showthread.php?tid=76)
UndoChanges when dragging, creating art - Rick Johnson - 05-31-2016
In the Tool sample, dragging the tool calls draw::ellipse, but with the Adobe SDK one has to call sAIUndo->UndoChanges( ) at the beginning of each drag iteration. Is this because the ellipse automatically disappears when the function goes out of scope? If my function draws custom art, I presume I need to call hdi::core::CurrentDocument::undo before redrawing the art at a new size or orientation; Is this correct?
RE: UndoChanges when dragging, creating art - garrett - 06-03-2016
Yes, undo is still part of the "drawing/dragging lifecycle", but CORE handles it automatically when the proper mouse events are issued by Illustrator.
RE: UndoChanges when dragging, creating art - Rick Johnson - 06-03-2016
Thanks, Garrett, that's a really cool feature. The more I use CORE, the more I come to appreciate its forethought and elegance. :-)