* @param y The y-coordinate.
	 * @param column The column the coordinates are currently over.
	 * @param row The row the coordinates are currently over.
	 * @return <code>true</code> if the coordinates are over a disclosure triangle.
	 */
	public boolean overDisclosureControl(int x, int y, Column column, Row row) {
		if (showIndent() && column != null && row != null && row.canHaveChildren() && mModel.isFirstColumn(column)) {
			StdImage image = getDisclosureControl(row);
			int right = getInsets().left + mModel.getIndentWidth(row, column);
			return x <= right && x >= right - image.getWidth();
		}
		return false;
	}