[8u] RFR 8072767: DefaultCellEditor for comboBox creates ActionEvent with wrong source object

[Zhengyu Gu]

Hi,

I would like to backport this patch to openjdk8u, for parity with Oracle 
8u291.

The original patch applies cleanly. However, the test failed on Fedora 
due to component layout issue. Please see comments in bug for details.

I added a delay to ensure that layout is stable before test starts to 
execute.

diff -r 15ca08c8faf5 test/javax/swing/JComboBox/8072767/bug8072767.java
--- a/test/javax/swing/JComboBox/8072767/bug8072767.java        Wed Apr 
15 14:38:13 2015 +0400
+++ b/test/javax/swing/JComboBox/8072767/bug8072767.java        Mon Jan 
18 10:11:16 2021 -0500
@@ -59,12 +59,12 @@
          robot.setAutoDelay(50);
          SwingUtilities.invokeAndWait(bug8072767::createAndShowGUI);
          robot.waitForIdle();
+        robot.delay(500);
          SwingUtilities.invokeAndWait(() -> {
              point = table.getLocationOnScreen();
              Rectangle rect = table.getCellRect(0, 0, true);
              point.translate(rect.width / 2, rect.height / 2);
          });



Original bug: https://bugs.openjdk.java.net/browse/JDK-8072767
Original patch: http://hg.openjdk.java.net/jdk9/jdk9/jdk/rev/2ca1d772b1f1

8u webrev: http://cr.openjdk.java.net/~zgu/JDK-8072767-8u/webrev.00/

Test:
  Test passed on Fedora/Ubuntu Linux x86_64

Thanks,

-Zhengyu