RFR: 7441: JVM System information tables do not scroll horizontally

[Marcus Hirt]

On Fri, 14 Jul 2023 01:24:18 GMT, Alex Macdonald <aptmac at openjdk.org> wrote:

> This PR addresses JMC-7441 [[0]](https://bugs.openjdk.org/browse/JMC-7441), in which the tables on the System tab in the JVM Browser don't scroll horizontally (very well).
> 
> While looking into this I noticed it affects many more tables, potentially most notable would be the automated analysis report ui, but that should be taken care of in a separate ticket.
> 
> The problem is that the column sizes aren't being set appropriately to the contents of the table. This affects the tables initialized with `SWT.VIRTUAL`, because these are lazy loaded and are not always fully filled out when it's time for the table to paint. I was playing around with an idea of adding a listener on the `SWT.Paint` event and having the columns re-sized in an attempt to keep these as virtual tables, but the initial re-paint was jarring visually. Also it might not make sense for (some of) these tables to be virtual; they don't contain a large amount of information and/or aren't mutable.
> 
> For the sake of the JVM Browser System tab tables, I just made these tables non-virtual and added a column packing function to the ColumnManager. The result is now the entire contents can be viewed in the table.
> 
> [0] https://bugs.openjdk.org/browse/JMC-7441

Marked as reviewed by hirt (Lead).

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

PR Review: https://git.openjdk.org/jmc/pull/505#pullrequestreview-1530135396