Fix issue #20: reset sentence color on text change (line number only)

[jaybutani1793]

Fix issue #20: reset sentence color on text change

Problem

Currently, after evaluating a sentence, the entire line background is colored (red/green).
However, according to the expected behavior:

• Only the "line number" should be colored
• Full line background coloring should be reserved for marking prerequisites

Additionally, the color was not resetting when the sentence text was modified.

Solution

• Updated coloring logic to apply color only to the line number column
• Removed full-row background coloring
• Ensured that color is reset when the sentence is edited
• Used setForeground() instead of setBackground()

Result

• ✔ Only line numbers are colored (correct UI behavior)
• ✔ Colors reset immediately when the sentence is modified
• ✔ UI now matches expected design and improves clarity

Testing

1. Enter a valid formula → evaluate → line number turns green
2. Enter an invalid formula → evaluate → line number turns red
3. Modify the sentence → color resets automatically
4. No full-row background coloring occurs

[kovzol]

Thanks for your work on this!
Your change is much better than it was, but it does not consider yet that former versions of Aris already have a partial implementation of the line number coloring:

That is, the background of the line numbers are colored to green in some cases (I guess, only for the conclusions, but I am not completely sure).

Do you have another suggestion to be in line with the former functionality? Thanks in advance.

[jaybutani1793]

Thanks for pointing this out!
You're absolutely right — I missed the existing partial implementation where the line number background is already used. That’s an important detail.

To better align with the previous behavior, I’ll refine the approach as follows:

Preserve the existing background coloring logic for line numbers (like conclusions)
Avoid overriding or conflicting with that behavior
Apply evaluation feedback using a non-intrusive method (e.g., foreground/text color or conditional styling only when needed)
Ensure that editing the sentence resets only the evaluation state, without affecting the original background semantics

This should keep the UI consistent with the original design while still solving issue #20 properly.

[jaybutani1793]

Thanks for the suggestion! I’ve updated the implementation to preserve existing background coloring and use only text color for evaluation. Editing now resets only the evaluation state. Also removed unintended file changes. This should now align with previous behavior and fix issue #20.

[kovzol]

Thanks, I'll have a look soon.