Horizontal scrolling not possible with touchpad with Metal and Nimbus L&F when both scrollbars are visible

[Alexander Scherbatiy]

Please, file the bug report in http://bugreport.java.com/bugreport

  Thanks,
  Alexandr.

On 7/25/2014 10:34 AM, Robert Krüger wrote:
> Hi,
>
> horizontal scrolling in a JScrollPane does not work with a touchpad
> with Metal and Nimbus Look & Feel  when both scrollbars are visible.
> It does work with Aqua.
>
> This little example demonstrates the problem:
>
> import javax.swing.*;
>
> public class TestTreeScrolling {
>      public static void main(String[] args) throws Exception {
>          for (UIManager.LookAndFeelInfo info :
> UIManager.getInstalledLookAndFeels()) {
>              if (info.getName().startsWith("Nimbus")) {
>                  UIManager.setLookAndFeel(info.getClassName());
>                  break;
>              }
>          }
>          final JFrame frame = new
> JFrame(TestTreeScrolling.class.getSimpleName());
>          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
>
>          final JScrollPane scrollPane = new JScrollPane(new JTree());
>          scrollPane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
>          scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
>          frame.getContentPane().add(scrollPane);
>          frame.pack();
>          frame.setVisible(true);
>      }
> }
>
> Expand the tree a bit and resize the window so that both scrollbars
> are visible. Making a horizontal scroll gesture on the touchpad
> results in vertical scrolling.
>
> Tested systematically with JDKs 6_51 and 8_11 but observed with all
> production releases of 8 before as well.
>
> Is this a known bug?
>
> Is there a known workaround (hacking the Look & Feel is also an option
> because we override it in our application anyway)? There must be as
> IntelliJ Idea does not have this problem and they are not using Aqua
> but I have failed to find it in their code.
>
> Does it make sense to file a bug report and if so where?
>
> Best,
>
> Robert