About popup hide

Question

Question F
1.How dose JPopupMenu or JMenuItem hiden ,when click any where .
2.How dose JComboBox's dropdown hidden ,when click any where.
3.Question1,2 is one answer?
I tried to read JComponent ,Popup ,PopupFactory ,JPopupMenu,JCombox and others source code,but in few day I can't find the way .Please help me and give directions B
JTextField editing ,dropdown a JPopupMenu contain maybe input words,but focus lost,can't still edit JTextField;
Edited by: tlw_ray on Oct 22, 2008 11:40 PM

Answer 1

Thans for you camickr .
My question is I dosen't know the theory , how swing manage popup item hiden;
I want a JTextField ,when I input word,it can drop down a popup assistant help me auto complete.
First I use PopupFactory to implement the function,but finally I notice that I can't hide the popup in an evnent.
Then I think maybe use somethin like menu can implement the function.So I use JPopupMenu ,but when it popup,the JTextField's focuse lose,I can't input still.then when JPopupMenu shown I set jTextField to requestFocuse().That's all .My problem resolved.But I still dose't know how the JPopupMenu hiden ,when click any where but the menu.And I tried use JWindow ,but it dosen't catch the deActive window event.
I hope can understand how swing manager popup show or hiden,maybe intro some article or indicate some code block can help me .I like java for he tell me what he do when a program running,
Utility Class:
import java.awt.Component;
import javax.swing.JFrame;
Author:唐力伟
E-Mail:[email protected]
Date:2008-10-22
Description:
public class Shower {
     public static void show(Component comp,int width,int height){
          JFrame f=new JFrame();
          f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          f.setSize(width, height);
          f.setLocationRelativeTo(null);
          f.add(comp,"Center");
          f.setVisible(true);
     public static void show(Component comp){
          show(comp,400,300);
}Here is my exmaple code:
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Window;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JPopupMenu;
import javax.swing.JTextField;
import javax.swing.JWindow;
import javax.swing.Popup;
import javax.swing.PopupFactory;
import tlw.example.Shower;
Author:tlw_ray
E-Mail:[email protected]
Date:2008-10-23
Description:input assistant
public class JTextFieldKindsOfPopup extends JPanel{
     private static final long serialVersionUID = 1L;
     public static void main(String[] args) {
          JTextFieldKindsOfPopup wp=new JTextFieldKindsOfPopup();
          Shower.show(wp);
     JTextField jtfWindowPopuup=new JTextField("Edit for Popup JWindow",20);
     JTextField jtfMenuPopup=new JTextField("Edit for Popup JPopupMenu",20);
     JTextField jtfPopup=new JTextField("Edit for PopupFactory Popup",20);
     Window popupWindow=new JWindow();
     JPopupMenu popupMenu=new JPopupMenu();
     Popup popup;
     JPanel popupPane=new JPanel();
     public JTextFieldKindsOfPopup(){
          add(jtfWindowPopuup,"North");
          add(jtfMenuPopup,"South");
          add(jtfPopup,"Center");
          //popup window
          popupWindow.setPreferredSize(new Dimension(300,300));
          popupWindow.setBackground(Color.red);
          popupWindow.setBounds(20, 20, 100, 100);
          popupWindow.setAlwaysOnTop(true);
          popupWindow.addWindowListener(new WindowListener());
          jtfWindowPopuup.addKeyListener(new KeyAdapter(){
               public void keyPressed(KeyEvent e){
                    popupWindow.setVisible(true);
                    //JWindow dosen't catch windowDeactivated event;
          //popup menu
          JMenuItem menuItem1=new JMenuItem("Item1");
          JMenuItem menuItem2=new JMenuItem("Item2");
          JMenuItem menuItem3=new JMenuItem("Item3");
          popupMenu.add(menuItem1);
          popupMenu.add(menuItem2);
          popupMenu.add(menuItem3);
          jtfMenuPopup.addKeyListener(new KeyAdapter(){
               public void keyPressed(KeyEvent e){
                    popupMenu.show(jtfMenuPopup, 0, jtfMenuPopup.getHeight());
                    jtfMenuPopup.requestFocus();
                    //this way can resolve,input assistant
          //popup factory
          popupPane.setBackground(Color.blue);
          popupPane.setPreferredSize(new Dimension(100,100));
          jtfPopup.addKeyListener(new KeyAdapter(){
               public void keyPressed(KeyEvent e){
                    popup=PopupFactory.getSharedInstance().getPopup(JTextFieldKindsOfPopup.this, popupPane, 100, 100);
                    popup.show();
                    //what event can i set the popup hide()?
                    //maybe popupFactory dosen't use for this ,it just use to Tooltip.
     class WindowListener extends WindowAdapter{
          @Override
          public void windowDeactivated(WindowEvent e) {
               popupWindow.setVisible(false);
}Here is my function code
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import java.text.Collator;
import java.util.Comparator;
import java.util.List;
import java.util.Locale;
import java.util.Vector;
import javax.swing.JCheckBox;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JPopupMenu;
import javax.swing.JScrollPane;
import javax.swing.JSpinner;
import javax.swing.JTextField;
import javax.swing.SpinnerNumberModel;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
Author:tlw
E-Mail:[email protected]
Date:2008-10-23
Description:
public class MSearch1 extends JPanel {
     private static final long serialVersionUID = 1L;
     public static void main(String[] args) {
          final MSearch1 ms=new MSearch1();
          ms.setItems(new String[]{"aaa","aab","aac","W3.UNIT1.E0003","W3.UNIT1.E0004","W3.UNIT1.E0005"});
          final JCheckBox jckDropDownMode=new JCheckBox("isDropDownMode");
          jckDropDownMode.setSelected(ms.getIsDropDown());
          jckDropDownMode.addActionListener(new ActionListener(){
               public void actionPerformed(ActionEvent e){
                    ms.setIsDropDownModel(jckDropDownMode.isSelected());
          final JCheckBox jckFilterMode=new JCheckBox("isFilterMode");
          jckFilterMode.setSelected(ms.getIsFilterMode());
          jckFilterMode.addActionListener(new ActionListener(){
               public void actionPerformed(ActionEvent e){
                    ms.setIsFilter(jckFilterMode.isSelected());
          final SpinnerNumberModel jspinModel=new SpinnerNumberModel(8,3,15,1);
          final JSpinner jspinnerRows=new JSpinner(jspinModel);
          jspinnerRows.setToolTipText("drop down item count.");
          jspinnerRows.addChangeListener(new ChangeListener(){
               public void stateChanged(ChangeEvent e) {
                    int rowCount=jspinModel.getNumber().intValue();
                    ms.setRows(rowCount);
          JPanel paneLeft=new JPanel();
          paneLeft.setLayout(new GridLayout(3,1));
          paneLeft.add(jckDropDownMode);
          paneLeft.add(jckFilterMode);
          paneLeft.add(jspinnerRows);
          JPanel pane=new JPanel();
          pane.setLayout(new BorderLayout());
          pane.add(ms,"Center");
          pane.add(paneLeft,"West");
          Shower.show(pane);
     /*---------user interface element-----------*/
     private JTextField jtfInput=new JTextField();
     private JList jlistReservior=new JList();
     private JScrollPane jscroll4List=new JScrollPane(jlistReservior);
     private JPopupMenu jpopup4List=new JPopupMenu();
     /*---------self property--------------*/
     private boolean isDropDownMode=true;
     private boolean isFilterMode=true;
     private int rows=8;
     private String[] items;
     /*---------constructor--------------*/
     public MSearch1(){
          initUI();
          initEvent();
     private void initUI(){
          jtfInput.setColumns(20);
          //Dimension listSize=new Dimension(20*16,rows*25);
          //jscroll4List.setPreferredSize(listSize);
          setLayout(new BorderLayout());
          add(jtfInput,"North");
          dropModelRefresh();
     private void initEvent(){
          jtfInput.getDocument().addDocumentListener(inputChange);
          jtfInput.addKeyListener(inputKeyListener);
          jtfInput.addComponentListener(resizeListener);
          jlistReservior.addMouseMotionListener(mouseOverShow);
          jlistReservior.addMouseListener(clickSelect);
     //filter items who start with user input;
     private void doFilter(){
          String txt=jtfInput.getText().toLowerCase();
          if(isFilterMode){
               if(items==null){
                    throw new RuntimeException("please use setItems() to initialize items for select¡£");
               List fileteredList=new Vector();//<String>
               for(int i=0;i<items.length;i++){
                    if(items.toLowerCase().startsWith(txt)){
                         fileteredList.add(items[i]);
               jlistReservior.setListData(fileteredList.toArray());
               jlistReservior.setSelectedIndex(0);
          }else{
               jlistReservior.setSelectedIndex(-1);
               for(int i=0;i<items.length;i++){
                    if(items[i].toLowerCase().startsWith(txt)){
                         jlistReservior.setSelectedValue(items[i], true);
                         return;
     private void refreshPopup(){
          if(isDropDownMode){
               if(jpopup4List==null){
                    jpopup4List=new JPopupMenu();
                    jpopup4List.add(jscroll4List);
               jpopup4List.show(jtfInput, jtfInput.getX(), jtfInput.getY()+jtfInput.getHeight());
               jtfInput.requestFocus();
     //listening user jtfInput change;
     private DocumentListener inputChange=new InputChange();
     class InputChange implements DocumentListener{
          public void changedUpdate(DocumentEvent e) {inputChanged();}
          public void insertUpdate(DocumentEvent e) {inputChanged();}
          public void removeUpdate(DocumentEvent e) {inputChanged();}
          private void inputChanged(){
               doFilter();
               refreshPopup();
     //listening user mouse double click jtfInput
     private DoubleClickDropDown clickDropDown=new DoubleClickDropDown();
     class DoubleClickDropDown extends MouseAdapter{
          public void mouseClicked(MouseEvent e){
               if(e.getButton()==MouseEvent.BUTTON1
                         && e.getClickCount()==2){
                    refreshPopup();
     //listening user click drop down list menu ,select item;
     private ClickSelect clickSelect=new ClickSelect();
     class ClickSelect extends MouseAdapter{
          public void mouseClicked(MouseEvent e){
               selectInDropDown();
     private void selectInDropDown(){
          jtfInput.setText(jlistReservior.getSelectedValue().toString());
          jpopup4List.setVisible(false);
     //listening user control key;
     private KeyListener inputKeyListener=new InputKeyListener();
     class InputKeyListener extends KeyAdapter{
          public void keyPressed(KeyEvent e){
               int selected=jlistReservior.getSelectedIndex();
               if(e.getKeyCode()==KeyEvent.VK_UP){
                    if(selected>0){
                         jlistReservior.setSelectedIndex(selected-1);
               }else if(e.getKeyCode()==KeyEvent.VK_DOWN){
                    if(selected<(jlistReservior.getModel().getSize()-1)){
                         jlistReservior.setSelectedIndex(selected+1);
               }else if(e.getKeyCode()==KeyEvent.VK_ENTER){
                    selectInDropDown();
     //listening list mouse over select
     private MouseMotionAdapter mouseOverShow=new MouseOverSelect();
     class MouseOverSelect extends MouseMotionAdapter{
          public void mouseMoved(MouseEvent e){
               int selected=jlistReservior.getSelectedIndex();
               int current=jlistReservior.locationToIndex(e.getPoint());
               if(selected!=current)
                    jlistReservior.setSelectedIndex(current);
     //listening when jtfInput resize
     private ComponentListener resizeListener=new ResizeListener();
     class ResizeListener extends ComponentAdapter{
          public void componentResized(ComponentEvent e){
               refreshSize();
     /*--------------weather drop down mode---------------------*/
     public boolean getIsDropDown(){
          return isDropDownMode;
     * É趨ÏÂÀģʽ£¬»ò¹Ì¶¨Ä£Ê½¡£É趨ºó×Ô¶¯Ë¢Ð½çÃæ¡£
     * @param dropDown true ±íʾÏÂÀģʽ£¬false ±íʾ¹Ì¶¨Ä£Ê½
     public void setIsDropDownModel(boolean dropDown){
          isDropDownMode=dropDown;
          dropModelRefresh();
          validate();
          repaint();
     private void dropModelRefresh(){
          if(isDropDownMode){
               remove(jscroll4List);
               jpopup4List.add(jscroll4List);
               jtfInput.addMouseListener(clickDropDown);
          }else{
               jpopup4List.remove(jscroll4List);
               add(jscroll4List,"Center");
               jtfInput.removeMouseListener(clickDropDown);
     /*--------------------drop down items-------------------------*/
     public void setItems(String[] strs){
          items=strs;
          refreshItems();
     public String[] getItems(){
          return items;
     private void refreshItems(){
          //if is filter mode ,items may be ordered;
          Comparator cmp = Collator.getInstance(Locale.getDefault());
          java.util.Arrays.sort(items, cmp);
          jlistReservior.setListData(items);
     /*---------------------weather filter mode------------------------*/
     public void setIsFilter(boolean isFilter){
          isFilterMode=isFilter;
          refreshItems();
     public boolean getIsFilterMode(){
          return isFilterMode;
     /*---------------------size property---------------------------------*/
     public int getRows(){
          return rows;
     public void setRows(int rowCount){
          rows=rowCount;
          refreshSize();
          validate();
          repaint();
     public int getColumns(){
          return jtfInput.getColumns();
     public void setColumns(int colCount){
          jtfInput.setColumns(colCount);
          validate();
          repaint();
     private void refreshSize(){
          Font font=jlistReservior.getFont();
          FontMetrics fm=jlistReservior.getFontMetrics(font);
          int height=fm.getHeight()*rows;
          //int height=jlistReservior.getFixedCellHeight()*rows;
          System.out.println(jlistReservior.getFixedCellHeight());
          Dimension size=new Dimension(jtfInput.getWidth(), height);
          jscroll4List.setPreferredSize(size);
     /*--------------------input text property-------------------*/
     public String getText(){
          return jtfInput.getText();
     public void setText(String text){
          jtfInput.setText(text);
Edited by: tlw_ray on Oct 23, 2008 10:56 PM