RFR: 4265389: JSplitPane does not support ComponentOrientation

[Abhishek Kumar]

On Wed, 17 Jul 2024 07:20:25 GMT, Prasanta Sadhukhan <psadhukhan at openjdk.org> wrote:

> JSplitPane's support of CompoentOrientation is not present so if orientation is RTL, it still renders left component on left and right component on right instead of other way around..
> Fix to make it support RTL orientation

src/java.desktop/share/classes/javax/swing/JSplitPane.java line 362:

> 360:                 setLeftComponent(newLeftComponent);
> 361:             if (newRightComponent != null)
> 362:                 setRightComponent(newRightComponent);

{ } should be there for single line if statement also. Applicable for L364 and L366.
Suggestion:

            if (newLeftComponent != null) {
                setLeftComponent(newLeftComponent);
            }
            if (newRightComponent != null) {
                setRightComponent(newRightComponent);
            }

test/jdk/javax/swing/JSplitPane/TestSplitPaneOrientationTest.java line 39:

> 37: public class TestSplitPaneOrientationTest {
> 38:     private static JButton leftOneTouchButton;
> 39:     private static JButton rightOneTouchButton;

Unused variables.

test/jdk/javax/swing/JSplitPane/TestSplitPaneOrientationTest.java line 60:

> 58:                 JSplitPane jsp = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,
> 59:                                                 new JButton("Left"), new JButton("Right"));
> 60:                 jsp.setEnabled(true);

`jsp.setEnabled(true)` may not be required.

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/20214#discussion_r1680759493
PR Review Comment: https://git.openjdk.org/jdk/pull/20214#discussion_r1680765627
PR Review Comment: https://git.openjdk.org/jdk/pull/20214#discussion_r1680783117