<AWT Dev> [10] Review request for 8179665: [Windows] java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location

[Semyon Sadetsky]

Hello,

Please review fix for JDK10:

bug: https://bugs.openjdk.java.net/browse/JDK-8179665

webrev: http://cr.openjdk.java.net/~ssadetsky/8179665/webrev.00/

The root cause of the issue is IME events are sent when always-on-top 
state is set or cleared even during the window is not visible. In this 
case requesting the window position causes the exception.

The fix introduces a check for window visibility before the calculation 
of the IME status window position. The latter should not be shown when 
the parent window is not visible so the IME window position is unnecessary.

--Semyon