Admin: 1 версия

2010-06-01T06:39:14Z

1 версия

в 18:01, 31 мая 2010

2010-05-31T18:01:44Z

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== A popup menu is sometimes called a context menu ==



<source lang="java">

import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JFrame;
import javax.swing.JMenuItem;
import javax.swing.JPopupMenu;
public class PopupMenu {
public static void main(String[] args) {
JFrame frame = new JFrame("JPopupMenu");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
final Toolkit toolkit = frame.getToolkit();
final JPopupMenu menu = new JPopupMenu();
JMenuItem menuItemBeep = new JMenuItem("Beep");
menuItemBeep.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
toolkit.beep();
}
});
menu.add(menuItemBeep);
JMenuItem menuItemClose = new JMenuItem("Close");
menuItemClose.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.exit(0);
}
});
menu.add(menuItemClose);
frame.addMouseListener(new MouseAdapter() {
public void mouseReleased(MouseEvent e) {
if (e.getButton() == e.BUTTON3) {
menu.show(e.getComponent(), e.getX(), e.getY());
}
}
});
frame.setSize(250, 200);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
}

</source>



== Configure all popup menus to be heavyweight ==



<source lang="java">

import javax.swing.JPopupMenu;
public class Main {
public static void main(String[] argv) throws Exception {
boolean lwPopup = JPopupMenu.getDefaultLightWeightPopupEnabled(); // true
// Globally use heavyweight components for all popup menus
JPopupMenu.setDefaultLightWeightPopupEnabled(false);
}
}

</source>



== Creating a Popup Menu ==



<source lang="java">

import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JButton;
import javax.swing.JMenuItem;
import javax.swing.JPopupMenu;
public class Main {
public static void main(String[] argv) throws Exception {
final JPopupMenu menu = new JPopupMenu();
JMenuItem item = new JMenuItem("Item Label");
// item.addActionListener(actionListener);
menu.add(item);
JButton component = new JButton("button");
component.addMouseListener(new MouseAdapter() {
public void mousePressed(MouseEvent evt) {
if (evt.isPopupTrigger()) {
menu.show(evt.getComponent(), evt.getX(), evt.getY());
}
}
public void mouseReleased(MouseEvent evt) {
if (evt.isPopupTrigger()) {
menu.show(evt.getComponent(), evt.getX(), evt.getY());
}
}
});
}
}

</source>



== Creating a Popup Menu with Nested Menus ==



<source lang="java">

import javax.swing.JMenu;
import javax.swing.JPopupMenu;
public class Main {
public static void main(String[] argv) throws Exception {
final JPopupMenu popupMenu = new JPopupMenu();
JMenu submenu = new JMenu("SubMenu1");
submenu.add("asdf");
submenu.add("asdf");
// Add submenu to popup menu
popupMenu.add(submenu);
}
}

</source>



== Force the popup menu of a JMenu to be heavyweight ==



<source lang="java">

import javax.swing.JMenu;
import javax.swing.JMenuItem;
public class Main {
public static void main(String[] argv) throws Exception {
JMenu menu = new JMenu("Menu Label");
menu.add(new JMenuItem("Item Label"));
boolean lwPopup = menu.getPopupMenu().isLightWeightPopupEnabled(); // true
menu.getPopupMenu().setLightWeightPopupEnabled(false);
}
}

</source>



== Forcing a Popup Menu to Be a Heavyweight Component ==



<source lang="java">

import javax.swing.JPopupMenu;
public class Main {
public static void main(String[] argv) throws Exception {
JPopupMenu popupMenu = new JPopupMenu();
boolean lwPopup = popupMenu.isLightWeightPopupEnabled(); // true
popupMenu.setLightWeightPopupEnabled(false);
}
}

</source>



== JPopupMenu with mouse event ==



<source lang="java">

import java.awt.Color;
import java.awt.ruponent;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JMenuItem;
import javax.swing.JPopupMenu;
public class PopUpColorMenu implements ActionListener {
Component selectedComponent;
public PopUpColorMenu() {
JFrame frame = new JFrame();
final JPopupMenu colorMenu = new JPopupMenu("Color");
colorMenu.add(makeMenuItem("Red"));
colorMenu.add(makeMenuItem("Green"));
colorMenu.add(makeMenuItem("Blue"));
MouseListener mouseListener = new MouseAdapter() {
public void mousePressed(MouseEvent e) {
checkPopup(e);
}
public void mouseClicked(MouseEvent e) {
checkPopup(e);
}
public void mouseReleased(MouseEvent e) {
checkPopup(e);
}
private void checkPopup(MouseEvent e) {
if (e.isPopupTrigger()) {
selectedComponent = e.getComponent();
colorMenu.show(e.getComponent(), e.getX(), e.getY());
}
}
};
frame.setLayout(new FlowLayout());
JButton button = new JButton("Uno");
button.addMouseListener(mouseListener);
frame.add(button);
button = new JButton("Due");
button.addMouseListener(mouseListener);
frame.add(button);
button = new JButton("Tre");
button.addMouseListener(mouseListener);
frame.add(button);
frame.getContentPane().addMouseListener(mouseListener);
frame.setSize(200, 50);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
public void actionPerformed(ActionEvent e) {
String color = e.getActionCommand();
if (color.equals("Red"))
selectedComponent.setBackground(Color.red);
else if (color.equals("Green"))
selectedComponent.setBackground(Color.green);
else if (color.equals("Blue"))
selectedComponent.setBackground(Color.blue);
}
private JMenuItem makeMenuItem(String label) {
JMenuItem item = new JMenuItem(label);
item.addActionListener(this);
return item;
}
public static void main(String[] args) {
new PopUpColorMenu();
}
}

</source>



== set Component Popup Menu ==



<source lang="java">

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JPopupMenu;
import javax.swing.JTextArea;
import javax.swing.JTextField;
public class ContextMenu implements ActionListener {
JTextArea textArea = new JTextArea();
public ContextMenu() {
final JPopupMenu contextMenu = new JPopupMenu("Edit");
contextMenu.add(makeMenuItem("Save"));
contextMenu.add(makeMenuItem("Save As"));
contextMenu.add(makeMenuItem("Close"));
JFrame frame = new JFrame();
JPanel panel = new JPanel();
panel.setLayout(new BorderLayout());
frame.add(panel);
panel.setComponentPopupMenu(contextMenu);
textArea.setInheritsPopupMenu(true);
panel.add(BorderLayout.CENTER, textArea);
JTextField textField = new JTextField();
textField.setInheritsPopupMenu(true);
panel.add(BorderLayout.SOUTH, textField);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(400, 200);
frame.setVisible(true);
}
public void actionPerformed(ActionEvent e) {
textArea.append(e.getActionCommand() + "\n");
}
private JMenuItem makeMenuItem(String label) {
JMenuItem item = new JMenuItem(label);
item.addActionListener(this);
return item;
}
public static void main(String[] args) {
new ContextMenu();
}
}

</source>



== setInheritsPopupMenu ==



<source lang="java">

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JPopupMenu;
import javax.swing.JTextArea;
import javax.swing.JTextField;
public class ContextMenu implements ActionListener {
JTextArea textArea = new JTextArea();
public ContextMenu() {
final JPopupMenu contextMenu = new JPopupMenu("Edit");
contextMenu.add(makeMenuItem("Save"));
contextMenu.add(makeMenuItem("Save As"));
contextMenu.add(makeMenuItem("Close"));
JFrame frame = new JFrame();
JPanel panel = new JPanel();
panel.setLayout(new BorderLayout());
frame.add(panel);
panel.setComponentPopupMenu(contextMenu);
textArea.setInheritsPopupMenu(true);
panel.add(BorderLayout.CENTER, textArea);
JTextField textField = new JTextField();
textField.setInheritsPopupMenu(true);
panel.add(BorderLayout.SOUTH, textField);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(400, 200);
frame.setVisible(true);
}
public void actionPerformed(ActionEvent e) {
textArea.append(e.getActionCommand() + "\n");
}
private JMenuItem makeMenuItem(String label) {
JMenuItem item = new JMenuItem(label);
item.addActionListener(this);
return item;
}
public static void main(String[] args) {
new ContextMenu();
}
}

</source>

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Java/Swing JFC/Popup menu - История изменений

Admin: 1 версия

в 18:01, 31 мая 2010