RFR: 7004: ThreadView : arrow up/down doesn't work

Sun Jun 11 11:29:45 UTC 2023

On Fri, 9 Jun 2023 20:34:30 GMT, Alex Macdonald <aptmac at openjdk.org> wrote:

> This PR address JMC-7004 [[0]](https://bugs.openjdk.org/browse/JMC-7004), in which the up + down arrow keys don't do anything on the threads page "table". The table on the threads page is actually a split version of the `ChartCanvas`, so any table-like behaviour is/was added into it. In this case, the `ChartTextCanvas` will now pass the current lane height to the `XYChart` which will use the value to select the next thread lane up or down depending on the keyboard action. 
> 
> [0] https://bugs.openjdk.org/browse/JMC-7004

Marked as reviewed by hirt (Lead).

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PR Review: https://git.openjdk.org/jmc/pull/492#pullrequestreview-1473668699