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

[Mike Swingler]

FYI, the code to do horizontal scroll in Aqua is in <http://hg.openjdk.java.net/jdk9/client/jdk/file/tip/src/macosx/classes/com/apple/laf/AquaScrollPaneUI.java>. The whole point of this class is to do the "grody hack". ;-)

Cheers,
Mike Swingler
Apple Inc.

On Jul 26, 2014, at 4:54 AM, Robert Krüger <krueger at lesspain.de> wrote:

> OK, I have done that. Btw, are there any concrete plans to migrate
> that to Jira as well?
> 
> Thanks,
> 
> Robert
> 
> On Fri, Jul 25, 2014 at 4:23 PM, Alexander Scherbatiy
> <alexandr.scherbatiy at oracle.com> wrote:
>> 
>> 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
>> 
>> 
> 
> 
> 
> -- 
> Robert Krüger
> Managing Partner
> Lesspain GmbH & Co. KG
> 
> www.lesspain-software.com