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Xournal Porting Woes

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I’m attempting to port Xournal ( to the iLiad.  It’s going pretty well, everything works almost as expected.  The show stopper here is screen updates when writing.  I can’t seem to get the screen to constantly update as I’m writing.  It will update after a brief period, and when I lift the stylus off of the screen, but not while I’m writing.  So far, I’ve tried using dmDisplay(dmCmdPriorUrgent, dmQTyping); to initiate the updates.  I’m starting to think I need to go about it a different way, or create a loop to continuously run that while it’s drawing the line.  I can release it now, but it may be too annoying for people.