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This is a backport of OpenJFX 8 to run on Java 7.
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/*
 * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * 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).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package com.sun.javafx.scene.control.behavior;

import javafx.scene.control.TableColumnBase;
import javafx.scene.control.TablePositionBase;
import javafx.scene.control.TableSelectionModel;
import javafx.scene.control.TreeItem;
import javafx.scene.control.TreeTableCell;
import javafx.scene.control.TreeTableColumn;
import javafx.scene.control.TreeTableView;
import javafx.scene.input.MouseButton;
import javafx.scene.input.MouseEvent;

/**
 */
public class TreeTableCellBehavior extends TableCellBehaviorBase> {
    
    /***************************************************************************
     *                                                                         *
     * Constructors                                                            *
     *                                                                         *
     **************************************************************************/    

    public TreeTableCellBehavior(TreeTableCell control) {
        super(control);
    }
    
    
    
    /***************************************************************************
     *                                                                         *
     * Implement TableCellBehaviorBase Abstract API                            *
     *                                                                         *
     **************************************************************************/          

    /** @{@inheritDoc} */
    @Override TreeTableView getTableControl() {
        return getControl().getTreeTableView();
    }

    /** @{@inheritDoc} */
    @Override TreeTableColumn getTableColumn() {
        return getControl().getTableColumn();
    }

    /** @{@inheritDoc} */
    @Override int getItemCount() {
        return getTableControl().getExpandedItemCount();
    }

    /** @{@inheritDoc} */
    @Override TreeTableView.TreeTableViewSelectionModel getSelectionModel() {
        return getTableControl().getSelectionModel();
    }

    /** @{@inheritDoc} */
    @Override TreeTableView.TreeTableViewFocusModel getFocusModel() {
        return getTableControl().getFocusModel();
    }

    /** @{@inheritDoc} */
    @Override TablePositionBase getFocusedCell() {
        return getTableControl().getFocusModel().getFocusedCell();
    }

    /** @{@inheritDoc} */
    @Override boolean isTableRowSelected() {
        return getControl().getTreeTableRow().isSelected();
    }

    /** @{@inheritDoc} */
    @Override TableColumnBase getVisibleLeafColumn(int index) {
        return getTableControl().getVisibleLeafColumn(index);
    }

    /** @{@inheritDoc} */
    @Override protected int getVisibleLeafIndex(TableColumnBase tc) {
        return getTableControl().getVisibleLeafIndex(null);
    }

    /** @{@inheritDoc} */
    @Override void focus(int row, TableColumnBase tc) {
        getFocusModel().focus(row, (TreeTableColumn)tc);
    }

    /** @{@inheritDoc} */
    @Override void edit(int row, TableColumnBase tc) {
        getTableControl().edit(row, (TreeTableColumn)tc);
    }
    
    @Override protected void simpleSelect(MouseEvent e) {
        TreeTableView tv = getControl().getTreeTableView();
        TreeItem treeItem = getControl().getTreeTableRow().getTreeItem();
        int index = getControl().getIndex();
        TreeTableColumn column = getTableColumn();
        TableSelectionModel sm = tv.getSelectionModel();
        
        boolean isAlreadySelected = sm.isSelected(index, column);

        if (isAlreadySelected && (e.isControlDown() || e.isMetaDown())) {
            sm.clearSelection(index, column);
            isAlreadySelected = false;
        } else {
            sm.clearAndSelect(index, column);
        }

        // handle editing, which only occurs with the primary mouse button
        if (e.getButton() == MouseButton.PRIMARY) {
            if (e.getClickCount() == 1 && isAlreadySelected) {
                tv.edit(index, column);
            } else if (e.getClickCount() == 1) {
                // cancel editing
                tv.edit(-1, null);
            } else if (e.getClickCount() == 2 && treeItem.isLeaf()) {
                // attempt to edit
                tv.edit(index, column);
            } else if (e.getClickCount() % 2 == 0) {
                // try to expand/collapse branch tree item
                treeItem.setExpanded(! treeItem.isExpanded());
            }
        }
    }
}