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  1. Qt
  2. QTBUG-45375

Jittery lines with Wacom tablet and QTabletEvent

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Details

    • Bug
    • Resolution: Done
    • P4: Low
    • 5.5.0
    • 5.4.0
    • QPA: X11/XCB
    • None
    • Ubuntu 15.04 beta, x.org 1.17.1

    Description

      The X,Y values in QTabletEvent are very unstable compared to Krita or GTK based programs. This seems to be because both of those use the double precision absolute axis values, while xi2ReportTabletEvent uses the fixed point event values.

      I made a patch to demonstrate/correct the difference, however I haven't pushed it to Gerrit because I'm unclear on what xcbWindow.geometry() actually contains or what handleTabletEvent expects the local point to be. So I have no idea if this will hold up on a high-dpi screen or with multiple monitors.

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              srutledg Shawn Rutledge
              danielsabo Daniel Sabo
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                Created:
                Updated:
                Resolved: