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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
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package javafx.scene.control;

import java.lang.ref.WeakReference;

/**
 * This class is used to represent a single row/column/cell in a TableView.
 * This is used throughout the TableView API to represent which rows/columns/cells
 * are currently selected, focused, being edited, etc. Note that this class is
 * immutable once it is created.
 *
 * 

Because the TableView can have different * {@link SelectionMode selection modes}, the row and column properties in * TablePosition can be 'disabled' to represent an entire row or column. This is * done by setting the unrequired property to -1 or null. * * @param The type of the items contained within the TableView (i.e. the same * generic type as the S in TableView<S>). * @param The type of the items contained within the TableColumn. * @see TableView * @see TableColumn * @since JavaFX 2.0 */ public class TablePosition extends TablePositionBase> { /*************************************************************************** * * * Constructors * * * **************************************************************************/ /** * Constructs a TablePosition instance to represent the given row/column * position in the given TableView instance. Both the TableView and * TableColumn are referenced weakly in this class, so it is possible that * they will be null when their respective getters are called. * * @param tableView The TableView that this position is related to. * @param row The row that this TablePosition is representing. * @param tableColumn The TableColumn instance that this TablePosition represents. */ public TablePosition(TableView tableView, int row, TableColumn tableColumn) { super(row, tableColumn); this.controlRef = new WeakReference>(tableView); } /*************************************************************************** * * * Instance Variables * * * **************************************************************************/ private final WeakReference> controlRef; /*************************************************************************** * * * Public API * * * **************************************************************************/ /** * The column index that this TablePosition represents in the TableView. It * is -1 if the TableView or TableColumn instances are null. */ @Override public int getColumn() { TableView tableView = getTableView(); TableColumn tableColumn = getTableColumn(); return tableView == null || tableColumn == null ? -1 : tableView.getVisibleLeafIndex(tableColumn); } /** * The TableView that this TablePosition is related to. */ public final TableView getTableView() { return controlRef.get(); } /** {@inheritDoc} */ @Override public final TableColumn getTableColumn() { // Forcing the return type to be TableColumn, not TableColumnBase return super.getTableColumn(); } /** * Returns a string representation of this {@code TablePosition} object. * @return a string representation of this {@code TablePosition} object. */ @Override public String toString() { return "TablePosition [ row: " + getRow() + ", column: " + getTableColumn() + ", " + "tableView: " + getTableView() + " ]"; } }