JMeter example source code file (DragNDrop.java)

This example JMeter source code file (DragNDrop.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - JMeter tags/keywords

awt, dragndrop, event, guipackage, hashset, jmetertreelistener, jmetertreenode, jmetertreenode, override, override, set, set, so, string, testelement, testplan, util

The JMeter DragNDrop.java source code

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package org.apache.jmeter.gui.action;

import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.util.HashSet;
import java.util.Set;

import org.apache.jmeter.gui.GuiPackage;
import org.apache.jmeter.gui.tree.JMeterTreeListener;
import org.apache.jmeter.gui.tree.JMeterTreeNode;
import org.apache.jmeter.gui.util.MenuFactory;
import org.apache.jmeter.testelement.TestElement;
import org.apache.jmeter.testelement.TestPlan;
import org.apache.jmeter.testelement.WorkBench;

public class DragNDrop extends AbstractAction {
    private static final Set<String> commands = new HashSet();

    static {
        commands.add(ActionNames.DRAG_ADD);
        commands.add(ActionNames.INSERT_BEFORE);
        commands.add(ActionNames.INSERT_AFTER);
    }

    /**
     * @see Command#doAction(ActionEvent)
     */
    @Override
    public void doAction(ActionEvent e) {
        String action = e.getActionCommand();
        GuiPackage guiPackage = GuiPackage.getInstance();
        JMeterTreeNode[] draggedNodes = guiPackage.getTreeListener().getDraggedNodes();
        JMeterTreeListener treeListener = guiPackage.getTreeListener();
        JMeterTreeNode currentNode = treeListener.getCurrentNode();
        JMeterTreeNode parentNode = (JMeterTreeNode) currentNode.getParent();
        TestElement te = currentNode.getTestElement();
        if (te instanceof TestPlan || te instanceof WorkBench) {
            parentNode = null; // So elements can only be added as children
        }

        if (ActionNames.DRAG_ADD.equals(action) && canAddTo(currentNode,draggedNodes)) {
            removeNodesFromParents(draggedNodes);
            for (int i = 0; i < draggedNodes.length; i++) {
                GuiPackage.getInstance().getTreeModel().insertNodeInto(draggedNodes[i], currentNode,
                        currentNode.getChildCount());
            }
        } else if (parentNode != null) {
            if (ActionNames.INSERT_BEFORE.equals(action) && canAddTo(parentNode,draggedNodes)) {
                removeNodesFromParents(draggedNodes);
                for (int i = 0; i < draggedNodes.length; i++) {
                    int index = parentNode.getIndex(currentNode);
                    GuiPackage.getInstance().getTreeModel().insertNodeInto(draggedNodes[i], parentNode, index);
                }
            } else if (ActionNames.INSERT_AFTER.equals(action) && canAddTo(parentNode,draggedNodes)) {
                removeNodesFromParents(draggedNodes);
                for (int i = 0; i < draggedNodes.length; i++) {
                    int index = parentNode.getIndex(currentNode) + 1;
                    GuiPackage.getInstance().getTreeModel().insertNodeInto(draggedNodes[i], parentNode, index);
                }
            }
        }
        GuiPackage.getInstance().getMainFrame().repaint();
    }

    private static boolean canAddTo(JMeterTreeNode parentNode, JMeterTreeNode[] draggedNodes) {
        boolean ok = MenuFactory.canAddTo(parentNode, draggedNodes);
        if (!ok){
            Toolkit.getDefaultToolkit().beep();
        }
        return ok;
    }

    private void removeNodesFromParents(JMeterTreeNode[] nodes) {
        for (int i = 0; i < nodes.length; i++) {
            GuiPackage.getInstance().getTreeModel().removeNodeFromParent(nodes[i]);
        }
    }

    /**
     * @see Command#getActionNames()
     */
    @Override
    public Set<String> getActionNames() {
        return commands;
    }
}