ubuntu-sdk-bugs team mailing list archive

[Alberto Mardegan <1564767@xxxxxxxxxxxxxxxxxx>]

It looks like the bug is in QtBase: in the XCB plugin, the
handleConfigureNotifyEvent() method initially wants to find out what is
the new screen for the window, but due to a bug, it gets a NULL screen
and decides to return from the function without processing the size
changes. The reason for the failure (that is, the reason why we get NULL
as a screen) is that the parentScreen() method doesn't take foreign
windows into account: when we are embedding windows with the XEMBED
protocol, the parent window is the embedder, which might live in another
process; Qt does not know anything about this window other than its
numeric ID, meaning that it doesn't know its screen either.

Therefore, we need to special-case these windows, and make sure that
parentScreen() returns a sensible value.

Note that the patch doesn't need upstreaming: the Qt 5.6 code is already
quite different (it doesn't even call the parentScreen() method here)
and might be already fine. I'll test it with a local build, and report a
bug to the Qt bugtracker in case.


** Patch added: "Patch for qtbase"
   https://bugs.launchpad.net/webapps-sprint/+bug/1564767/+attachment/4622777/+files/xcb_fix_parent_screen_of_embedded_windows.patch

** Also affects: qtbase-opensource-src (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1564767

Title:
  Wrong size of embedded window

Status in webapps-sprint:
  In Progress
Status in gnome-control-center-signon package in Ubuntu:
  New
Status in qtbase-opensource-src package in Ubuntu:
  New

Bug description:
  When creating an online account in Xenial, the embedded webview is not
  properly resized to fill up the embedder's area (see attached
  screenshot).

  I'll investigate to find out whether this is a problem with the window
  manager, or with the XEMBED implementation in Gdk or Qt; but
  meanwhile, I'll try to apply a workaround in unity-control-center-
  signon.

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