RFR: 8293119: Additional constrained resize policies for Tree/TableView [v21]

[Kevin Rushforth]

On Tue, 13 Dec 2022 22:14:29 GMT, Andy Goryachev <angorya at openjdk.org> wrote:

>> The current CONSTRAINED_RESIZE_POLICY has a number of issues as explained in [JDK-8292810](https://bugs.openjdk.org/browse/JDK-8292810).
>> 
>> We propose to address all these issues by replacing the old column resize algorithm with a different one, which not only honors all the constraints when resizing, but also provides 4 different resize modes similar to JTable's. The new implementation brings changes to the public API for Tree/TableView and ResizeFeaturesBase classes. Specifically:
>> 
>> - create a public abstract javafx.scene.control.ConstrainedColumnResizeBase class
>> - provide an out-of-the box implementation via javafx.scene.control.ConstrainedColumnResize class, offeting 4 resize modes: AUTO_RESIZE_NEXT_COLUMN, AUTO_RESIZE_SUBSEQUENT_COLUMNS, AUTO_RESIZE_LAST_COLUMN, AUTO_RESIZE_ALL_COLUMNS
>> - add corresponding public static constants to Tree/TableView
>> - make Tree/TableView.CONSTRAINED_RESIZE_POLICY an alias to AUTO_RESIZE_SUBSEQUENT_COLUMNS (a slight behavioral change - discuss)
>> - add getContentWidth() and setColumnWidth(TableColumnBase<S,?> col, double width) methods to ResizeFeatureBase
>> - suppress the horizontal scroll bar when resize policy is instanceof ConstrainedColumnResizeBase
>> - update javadoc
>> 
>> 
>> Notes
>> 
>> 1. The current resize policies' toString() methods return "unconstrained-resize" and "constrained-resize", used by the skin base to set a pseudostate. All constrained policies that extend ConstrainedColumnResizeBase will return "constrained-resize" value.
>> 2. The reason an abstract class ( ConstrainedColumnResizeBase) was chosen instead of a marker interface is exactly for its toString() method which supplies "constrained-resize" value. The implementors might choose to use a different value, however they must ensure the stylesheet contains the same adjustments for the new policy as those made in modena.css for "constrained-resize" value.
>
> Andy Goryachev has updated the pull request incrementally with one additional commit since the last revision:
> 
>   8293119: abstract

The API changes to make the class abstract look good.

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PR: https://git.openjdk.org/jfx/pull/897