Uploaded image for project: 'Qt'
  1. Qt
  2. QTBUG-68698

Support for touch rotation in libinput/eglfs

    XMLWordPrintable

Details

    • 3941fe697 (dev)

    Description

      When using evdev, QT can rotate the touch input to match a rotated screen via the QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS variable. However, if you are using libinput, there is no such method.

      It's noted in QTBUG-53768 that this is the case, but the resolution there is that wayland should  support this functionality, not Qt. But if you are using eglfs, rather than wayland (eg, on a raspberry pi) this doesn't solve the issue.

      We have implemented a patch that does this, attached. We just did this by passing the libinput coordinate transform matrix as an environment variable, but I guess you might want it to be compatible with the arguments used in QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS. It's probably worth our while to do that rather than building a patched version, so we could make a version which uses the same args if you want.

       

       

       

      Attachments

        Issue Links

          No reviews matched the request. Check your Options in the drop-down menu of this sections header.

          Activity

            People

              srutledg Shawn Rutledge
              alex.burr Alex Burr
              Votes:
              4 Vote for this issue
              Watchers:
              8 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved:

                Gerrit Reviews

                  There are no open Gerrit changes