Package org.apache.jmeter.gui.tree

Source Code of org.apache.jmeter.gui.tree.JMeterTreeListener

/*
* 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.tree;

import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;

import javax.swing.JLabel;
import javax.swing.JMenuItem;
import javax.swing.JPopupMenu;
import javax.swing.JTree;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.TreeNode;
import javax.swing.tree.TreePath;

import org.apache.jmeter.control.gui.TestPlanGui;
import org.apache.jmeter.control.gui.WorkBenchGui;
import org.apache.jmeter.gui.GuiPackage;
import org.apache.jmeter.gui.MainFrame;
import org.apache.jmeter.gui.action.ActionNames;
import org.apache.jmeter.gui.action.ActionRouter;
import org.apache.jmeter.gui.action.KeyStrokes;
import org.apache.jmeter.gui.util.MenuFactory;
import org.apache.jmeter.util.JMeterUtils;
import org.apache.jorphan.logging.LoggingManager;
import org.apache.log.Logger;

public class JMeterTreeListener implements TreeSelectionListener, MouseListener, KeyListener, MouseMotionListener {
  private static final Logger log = LoggingManager.getLoggerForClass();

  // Container endWindow;
  // JPopupMenu pop;
  private TreePath currentPath;

  private ActionListener actionHandler;

  private JMeterTreeModel model;

  private JTree tree;

  private boolean dragging = false;

  private JMeterTreeNode[] draggedNodes;

  private JLabel dragIcon = new JLabel(JMeterUtils.getImage("leafnode.gif")); // $NON-NLS-1$

  /**
   * Constructor for the JMeterTreeListener object.
   */
  public JMeterTreeListener(JMeterTreeModel model) {
    this.model = model;
    dragIcon.validate();
    dragIcon.setVisible(true);
  }

  public JMeterTreeListener() {
    dragIcon.validate();
    dragIcon.setVisible(true);
  }

  public void setModel(JMeterTreeModel m) {
    model = m;
  }

  /**
   * Sets the ActionHandler attribute of the JMeterTreeListener object.
   *
   * @param ah
   *            the new ActionHandler value
   */
  public void setActionHandler(ActionListener ah) {
    actionHandler = ah;
  }

  /**
   * Sets the JTree attribute of the JMeterTreeListener object.
   *
   * @param tree
   *            the new JTree value
   */
  public void setJTree(JTree tree) {
    this.tree = tree;
  }

  /**
   * Sets the EndWindow attribute of the JMeterTreeListener object.
   *
   * @param window
   *            the new EndWindow value
   */
  public void setEndWindow(Container window) {
    // endWindow = window;
  }

  /**
   * Gets the JTree attribute of the JMeterTreeListener object.
   *
   * @return tree the current JTree value.
   */
  public JTree getJTree() {
    return tree;
  }

  /**
   * Gets the CurrentNode attribute of the JMeterTreeListener object.
   *
   * @return the CurrentNode value
   */
  public JMeterTreeNode getCurrentNode() {
    if (currentPath != null) {
      if (currentPath.getLastPathComponent() != null) {
        return (JMeterTreeNode) currentPath.getLastPathComponent();
      }
      return (JMeterTreeNode) currentPath.getParentPath().getLastPathComponent();
    }
    return (JMeterTreeNode) model.getRoot();
  }

  public JMeterTreeNode[] getSelectedNodes() {
    TreePath[] paths = tree.getSelectionPaths();
    if (paths == null) {
      return new JMeterTreeNode[] { getCurrentNode() };
    }
    JMeterTreeNode[] nodes = new JMeterTreeNode[paths.length];
    for (int i = 0; i < paths.length; i++) {
      nodes[i] = (JMeterTreeNode) paths[i].getLastPathComponent();
    }

    return nodes;
  }

  public TreePath removedSelectedNode() {
    currentPath = currentPath.getParentPath();
    return currentPath;
  }

  public void valueChanged(TreeSelectionEvent e) {
    log.debug("value changed, updating currentPath");
    currentPath = e.getNewLeadSelectionPath();
    actionHandler.actionPerformed(new ActionEvent(this, 3333, "edit")); // $NON-NLS-1$
  }

  public void mouseClicked(MouseEvent ev) {
  }

  public void mouseReleased(MouseEvent e) {
    if (dragging && isValidDragAction(draggedNodes, getCurrentNode())) {
      dragging = false;
      JPopupMenu dragNdrop = new JPopupMenu();
      JMenuItem item = new JMenuItem(JMeterUtils.getResString("insert_before")); // $NON-NLS-1$
      item.addActionListener(actionHandler);
      item.setActionCommand(ActionNames.INSERT_BEFORE);
      dragNdrop.add(item);
      item = new JMenuItem(JMeterUtils.getResString("insert_after")); // $NON-NLS-1$
      item.addActionListener(actionHandler);
      item.setActionCommand(ActionNames.INSERT_AFTER);
      dragNdrop.add(item);
      if (MenuFactory.canAddTo(getCurrentNode(), draggedNodes)){
        item = new JMenuItem(JMeterUtils.getResString("add_as_child")); // $NON-NLS-1$
        item.addActionListener(actionHandler);
        item.setActionCommand(ActionNames.DRAG_ADD);
        dragNdrop.add(item);
      }
      dragNdrop.addSeparator();
      item = new JMenuItem(JMeterUtils.getResString("cancel")); // $NON-NLS-1$
      dragNdrop.add(item);
      displayPopUp(e, dragNdrop);
    } else {
      GuiPackage.getInstance().getMainFrame().repaint();
    }
    dragging = false;
  }

  public JMeterTreeNode[] getDraggedNodes() {
    return draggedNodes;
  }

  /**
   * Tests if the node is being dragged into one of it's own sub-nodes, or
   * into itself.
   */
  private boolean isValidDragAction(JMeterTreeNode[] source, JMeterTreeNode dest) {
    boolean isValid = true;
    TreeNode[] path = dest.getPath();
    for (int i = 0; i < path.length; i++) {
      if (contains(source, path[i])) {
        isValid = false;
      }
    }
    return isValid;
  }

  public void mouseEntered(MouseEvent e) {
  }

  private void changeSelectionIfDragging(MouseEvent e) {
    if (dragging) {
      GuiPackage.getInstance().getMainFrame().drawDraggedComponent(dragIcon, e.getX(), e.getY());
      if (tree.getPathForLocation(e.getX(), e.getY()) != null) {
        currentPath = tree.getPathForLocation(e.getX(), e.getY());
        if (!contains(draggedNodes, getCurrentNode())) {
          tree.setSelectionPath(currentPath);
        }
      }
    }
  }

  private boolean contains(Object[] container, Object item) {
    for (int i = 0; i < container.length; i++) {
      if (container[i] == item) {
        return true;
      }
    }
    return false;
  }

  public void mousePressed(MouseEvent e) {
    // Get the Main Frame.
    MainFrame mainFrame = GuiPackage.getInstance().getMainFrame();
    // Close any Main Menu that is open
    mainFrame.closeMenu();
    int selRow = tree.getRowForLocation(e.getX(), e.getY());
    if (tree.getPathForLocation(e.getX(), e.getY()) != null) {
      log.debug("mouse pressed, updating currentPath");
      currentPath = tree.getPathForLocation(e.getX(), e.getY());
    }
    if (selRow != -1) {
      // updateMainMenu(((JMeterGUIComponent)
      // getCurrentNode().getUserObject()).createPopupMenu());
      if (isRightClick(e)) {
        if (tree.getSelectionCount() < 2) {
          tree.setSelectionPath(currentPath);
        }
        log.debug("About to display pop-up");
        displayPopUp(e);
      }
    }
  }

  public void mouseDragged(MouseEvent e) {
    if (!dragging) {
      dragging = true;
      draggedNodes = getSelectedNodes();
      if (draggedNodes[0].getUserObject() instanceof TestPlanGui
          || draggedNodes[0].getUserObject() instanceof WorkBenchGui) {
        dragging = false;
      }

    }
    changeSelectionIfDragging(e);
  }

  public void mouseMoved(MouseEvent e) {
  }

  public void mouseExited(MouseEvent ev) {
  }

  public void keyPressed(KeyEvent e) {
    if (KeyStrokes.matches(e,KeyStrokes.COPY)) {
      ActionRouter actionRouter = ActionRouter.getInstance();
      actionRouter.doActionNow(new ActionEvent(e.getSource(), e.getID(), ActionNames.COPY));
    }
    if (KeyStrokes.matches(e,KeyStrokes.PASTE)) {
      ActionRouter actionRouter = ActionRouter.getInstance();
      actionRouter.doActionNow(new ActionEvent(e.getSource(), e.getID(), ActionNames.PASTE));
    }
    if (KeyStrokes.matches(e,KeyStrokes.CUT)) {
      ActionRouter actionRouter = ActionRouter.getInstance();
      actionRouter.doActionNow(new ActionEvent(e.getSource(), e.getID(), ActionNames.CUT));
    }
  }

  public void keyReleased(KeyEvent e) {
  }

  public void keyTyped(KeyEvent e) {
  }

  private boolean isRightClick(MouseEvent e) {
    return (MouseEvent.BUTTON2_MASK & e.getModifiers()) > 0 || (MouseEvent.BUTTON3_MASK == e.getModifiers());
  }

  private void displayPopUp(MouseEvent e) {
    JPopupMenu pop = getCurrentNode().createPopupMenu();
    GuiPackage.getInstance().displayPopUp(e, pop);
  }

  private void displayPopUp(MouseEvent e, JPopupMenu popup) {
    log.warn("Shouldn't be here");
    if (popup != null) {
      popup.pack();
      popup.show(tree, e.getX(), e.getY());
      popup.setVisible(true);
      popup.requestFocus();
    }
  }
}
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