TableView column resizer extension function

One thing that frustrated me for awhile is having a way to fit TableView columns to the header and cell contents. Then I found a little gem in a Stack Overflow post.

I was able to come up with this class to expose that resizeColumnToFitContent()

public final class TableColumnResizer<T> extends TableViewSkin<T> {

    public TableColumnResizer(TableView<T> tableView) {
        super(tableView);
    }

    @Override
    public void resizeColumnToFitContent(TableColumn<T, ?> tc, int maxRows) {
      super.resizeColumnToFitContent(tc,maxRows);
    }
}

Then I can apply that TableViewSkin to the skinProperty(), and call a resizeOp function at any time to re-fit the columns.

var resizeOp: (() -> Unit) by singleAssign()

//layout built here

tableView.apply {
    val resizerSkin = TableColumnResizer<FTRecord>(this);
    skinProperty().set(resizerSkin)
    resizeOp = { columns.forEach { resizerSkin.resizeColumnToFitContent(it, 100) } }
}

It would be awesome if we could apply a resizeColumns() extension function to the TableView. The problem is I can’t think of an efficient way at the top of my head without extending TableView or doing some lazy operation that stores state elsewhere. It’s really too bad extension properties can’t be fields.

[thomasnield]

Brilliant! Works perfectly. Thanks Edvin, that was pretty clever.

[thomasnield]

Okay awesome, ill play with it again when I get back to my tablet.