[miinhho]

What is this PR for?

The Angular UI saves the selected scatter-chart Size column, but the renderer binds point sizes to the normalized Y values instead. Selecting a different Size column therefore does not change the size mapping.

This PR binds point sizes to the selected column and restores the default point size when the selection is cleared. It preserves the existing Y-value tooltips and group legend rather than allowing G2 to replace tooltip values or add a Size legend.

What type of PR is it?

Bug Fix

What is the Jira issue?

• https://issues.apache.org/jira/browse/ZEPPELIN-6583

How should this be tested?

Run the focused regression tests from zeppelin-web-angular:

npm run test:shell -- src/app/visualizations/scatter-chart/scatter-chart-visualization.component.spec.ts

For manual verification in the Angular UI, use a paragraph that emits the following tab-separated table output:

%table x   y   size   alternate   group
1   10   2   20   A
2   10   8   8   B
3   10   20   2   A

1. Select the scatter chart and assign X Axis to x, Y Axis to y, and Group to group.
2. Assign Size to size. Point sizes should increase from x=1 to x=3 even though all Y values are equal.
3. Change Size to alternate. The size ordering should reverse while point positions and group colors remain unchanged.
4. Hover over the points and inspect the legend. Tooltips should still display the Y value (10), and the legend should retain groups A/B without an additional Size legend.
5. Clear Size. All points should return to the default uniform size.

Questions:

• Does the license files need to update? No
• Is there breaking changes for older versions? No
• Does this needs documentation? No

[voidmatcha]

LGTM 👍

As a follow-up, it would be worth considering scaling point areas, as Classic UI does. This could reduce the visual exaggeration of size differences caused by radius-based scaling and keep the behavior consistent with the existing UI.

[voidmatcha]

Merged into master (3f3463b).