private int findX(int col) {
		if (col > textElement.length()) {
			col = textElement.length();
		}
		return textElement.substring(0, col).getStringWidth();
	}
Converts a single column value into a MultiStringLocation which specifies
a string index and a column position within that string.

@param screenColumn
           the overall column position in the total String.
@return MultiStringLocation the MultiStringLocation corresponding to the
        given column.
Ghidra/Framework/Docking/src/main/java/docking/widgets/fieldpanel/field/ReverseClippingTextField.java