<AWT Dev> <Awt Dev> [9] Review Request for 8036915: setLocationRelativeTo stopped working in Ubuntu 13.10 (Unity)

Semyon Sadetsky semyon.sadetsky at oracle.com
Tue Oct 6 06:03:04 UTC 2015

In is extended event. In does not guaranteed to be sent by any WM.

On 10/5/2015 6:12 PM, Sergey Bylokhov wrote:
> Why we cannot treat such a XA_NET_FRAME_EXTENTS as a ConfigureNotify 
> in which only insets are changed, and the window bounds/insets should 
> be revalidated?
> On 05.10.15 14:56, Semyon Sadetsky wrote:
>> Hello,
>> Please review fix for JDK9:
>> bug: https://bugs.openjdk.java.net/browse/JDK-8036915
>> webrev: http://cr.openjdk.java.net/~ssadetsky/8036915/webrev.00/
>> The test scenario attached to the jira contains potential errors because
>> Componet.getLocation() won't return the location at any moment of time.
>> Anyway a window location issue exists in Unity. The root cause is that
>> the real insets sent with the XA_NET_FRAME_EXTENTS event can be
>> overridden by the "guessed" insets which are zero on Unity. So the
>> returned location is increased by real insets while the real window
>> location is correct.
>> Yet another issue I found in Unity is a window size issue which is also
>> caused by the frame insets detection. The Unity WM doesn't provide the
>> frame insets immediately and XA_NET_FRAME_EXTENTS event may come after
>> the ConfigureNotify event for the frame.
>> The solution proposes an adaptation of the existing frame insets request
>> algorithm to the Unity WM so that makes it more stable.
>> --Semyon

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