PopupMenu: another PopupDemo Java code example - Click here to copy ->>>

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Code:







// From: mg@dsd.camb.inmet.com (Mitch Gart)



import java.awt.*;

import java.awt.event.*;

import java.lang.*;

import java.util.*;



public class PopupDemo extends Frame

    implements ActionListener, MouseListener {



   public static void main (String argv[]) {

      new PopupDemo().setVisible(true);

   }



   public PopupDemo() {

      MenuBar mb = new MenuBar();

      setMenuBar(mb);

      Menu m = new Menu("file");

      mb.add(m);

      MenuItem item = new MenuItem("file-1");

      item.addActionListener(this);

      m.add(item);

      item = new MenuItem("file-2");

      m.add(item);



      setSize(100, 100);

      setLayout(new BorderLayout());



      Label l = new Label("label");

      addPopup(l, "label");

      add(l, "North");



      Panel p = new Panel();

      addPopup(p, "Panel");

      add(p, "Center");



      Button b = new Button("button");

      addPopup(b, "button");

      add(b, "South");

   }



   public void actionPerformed(ActionEvent e) {

      System.out.println("actionPerformed, event=" + e + ", mod=" + getMods(e));

      System.out.println(" command=" + e.getActionCommand());

      System.out.println(" param=" + e.paramString());

      System.out.println(" source=" + e.getSource());

   }



     String getMods(ActionEvent e) { return getMods(e.getModifiers()); }



     String getMods(MouseEvent e) { return getMods(e.getModifiers()); }



  // a convenience routine for printing the Modifier keys

   String getMods(int mods) {

    String modstr = "";

    if ((mods & ActionEvent.SHIFT_MASK) == ActionEvent.SHIFT_MASK)

      modstr += (" SHIFT");

    if ((mods & ActionEvent.ALT_MASK) == ActionEvent.ALT_MASK)

      modstr += (" ALT");

    if ((mods & ActionEvent.CTRL_MASK) == ActionEvent.CTRL_MASK)

      modstr += (" CTRL");

    if ((mods & ActionEvent.META_MASK) == ActionEvent.META_MASK)

      modstr += (" META");

    return modstr;

  }



  public void mouseClicked (MouseEvent e) {

    mouseAction("mouseClicked", e);

  }



  public void mouseEntered (MouseEvent e) {

  }



  public void mouseExited (MouseEvent e) {

  }



  public void mousePressed (MouseEvent e) {

    mouseAction("mousePressed", e);

  }



  public void mouseReleased (MouseEvent e) {

    mouseAction("mouseReleased", e);

  }



  void mouseAction (String which, MouseEvent e) {

    Component c = e.getComponent();

    System.out.println(which + "e=" + e + ", mods=" + getMods(e) +

                       ", component=" + c);

    if (e.isPopupTrigger()) {

      System.out.println("isPopup");

      PopupMenu pm = getHash(c);

      pm.show(c, c.getSize().width/2, c.getSize().height/2);

    }

  }





  void addPopup(Component c, String name) {

    PopupMenu pm = new PopupMenu();

    MenuItem mi = new MenuItem(name + "-1");

    mi.addActionListener(this);

    pm.add(mi);



    mi = new MenuItem(name + "-2");

    pm.add(mi);



    setHash(c, pm);

    c.add(pm);

    c.addMouseListener(this);

  }





  Hashtable popupTable = new Hashtable();



  void setHash(Component c, PopupMenu p) {

    popupTable.put(c, p);

  }



  PopupMenu getHash(Component c) {

    return (PopupMenu)(popupTable.get(c));

  }

}







/**

*   Java Code from Java Cookbook, Second Edition

*   By Ian F. Darwin

*   Second Edition June 2004

*   Series: Cookbooks

*   ISBN: 0-596-00701-9

*   Details: http://www.oreilly.com/catalog/javacook2/index.html

*   Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.

*   All rights reserved. Software written by Ian F. Darwin and others.

*   $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $

*/