Fix Grid column title not visible when column is in a group

[Copilot]

paintColumnHeaderWithGroup() reuses the width variable for both the accumulated group width and the individual column width. After the while loop sums all visible column widths in the group, the inflated value is passed to the column header renderer's setBounds(), causing right-aligned titles and sort arrows to render off-screen.

• Introduce a separate groupWidth variable for the group header width accumulation
• width remains the individual column width, used correctly for the column header bounds

int width = column.getWidth(extraFill);
if (group != null) {
    if (group != previousPaintedGroup) {
        int groupWidth = width;
        // ...
        while (nextCol != null && nextCol.getColumnGroup() == group) {
            // ...
            groupWidth += nextCol.getWidth(extraFill);  // was: width +=
        }
        group.getHeaderRenderer().setBounds(x, 0, groupWidth, groupHeaderHeight);
    }
}
// ...
renderer.setBounds(x, y, width, height);  // now uses column width, not group width

Original prompt

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This section details on the original issue you should resolve

<issue_title>Grid column title not visible</issue_title>
<issue_description>

nebula/widgets/grid/org.eclipse.nebula.widgets.grid/src/org/eclipse/nebula/widgets/grid/Grid.java

Line 5817 in 0f4fd97

width += nextCol.getWidth(extraFill);

width will contains the group width, but is also used as column width

nebula/widgets/grid/org.eclipse.nebula.widgets.grid/src/org/eclipse/nebula/widgets/grid/Grid.java

Line 5863 in 0f4fd97

renderer.setBounds(x, y, width, height);

as consequence, column header title with right align or the sort arrow are not visible.</issue_description>

<agent_instructions>Please enhance the snippet for this case so we can see the problem and propose a fix for the issue.</agent_instructions>

Comments on the Issue (you are @copilot in this section)

@lcaron Hi Fabrice

Can you provide a patch that solves the problem or a code sample ?

Thank you

Laurent</comment_new>

• Fixes Grid column title not visible #689

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[laeubi]

Looks reasonable to me.