TableView and HorizontalHeaderView column widths do not match, even with syncView property set

[Aleksey_K]

❓ Problem: TableView and HorizontalHeaderView column widths do not match, even with syncView

I'm using Qt Quick (Qt 6.8) with a TableView and a HorizontalHeaderView. I’ve set up syncView so that the header and table should stay in sync:

HorizontalHeaderView {
    id: header
    Layout.fillWidth: true
    syncView: tableView
}

The TableView defines a columnWidthProvider to calculate dynamic widths, including a "stretch" column (e.g. column 2):

TableView {
    id: tableView
    Layout.fillWidth: true

    columnWidthProvider: function (column) {
        let min = minimalColumnWidth(column)
        if (column === 2) {
            return stretchColumnWidth()
        }
        return min
    }
}

However, some columns (especially columns 2 and 3) show mismatched widths between the table and header. This happens even though syncView is set.

[Aleksey_K]

✅ Solution: Force layout recalculation after width changes

To ensure layout syncs correctly, you need to explicitly trigger layout updates when the TableView or HorizontalHeaderView resizes.

Fix: Add onWidthChanged: tableView.forceLayout() in both the TableView and the HorizontalHeaderView.

🔧 Updated code:

TableView {
    id: tableView

    columnWidthProvider: function (column) {
        // Your width logic
    }

    onWidthChanged: tableView.forceLayout()
}

HorizontalHeaderView {
    id: header
    syncView: tableView

    onWidthChanged: tableView.forceLayout()
}

✅ Even in HorizontalHeaderView, you call **tableView.forceLayout()**, not header.forceLayout().

---

🧠 Why this works

• columnWidthProvider often runs before tableView.width is fully initialized or updated.
• forceLayout() triggers Qt to re-run layout and width calculations with correct sizing.
• syncView can now properly sync header and table widths based on the final layout pass.

---

✅ Result

Now the header and table stay in perfect sync, even when:

• Resizing the window
• Stretching a specific column to take remaining space
• Changing content dynamically