в 17:43, 31 мая 2010

2010-05-31T17:43:48Z

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2010-05-31T14:18:58Z

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== JMenuBar: add(JComponent com) ==



<source lang="java">

import java.awt.event.KeyEvent;
import javax.swing.ButtonGroup;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JRadioButtonMenuItem;
public class MainClass {
public static void main(String args[]) {
JFrame f = new JFrame("JRadioButtonMenuItem Sample");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JMenuBar bar = new JMenuBar();
JMenu menu = new JMenu("Options");
menu.setMnemonic(KeyEvent.VK_O);
ButtonGroup group = new ButtonGroup();
JRadioButtonMenuItem menuItem = new JRadioButtonMenuItem("A");
group.add(menuItem);
menu.add(menuItem);
menuItem = new JRadioButtonMenuItem("B");
group.add(menuItem);
menu.add(menuItem);
menuItem = new JRadioButtonMenuItem("C");
group.add(menuItem);
menu.add(menuItem);
bar.add(menu);
f.setJMenuBar(bar);
f.setSize(300, 200);
f.setVisible(true);
}
}

</source>



== JMenuBar: setLayout(LayoutManager mgr) ==



<source lang="java">

/*
*
* Copyright (c) 1998 Sun Microsystems, Inc. All Rights Reserved.
*
* Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
* modify and redistribute this software in source and binary code form,
* provided that i) this copyright notice and license appear on all copies of
* the software; and ii) Licensee does not utilize the software in a manner
* which is disparaging to Sun.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
* IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
* NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
* LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
* OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
* LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
* INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
* CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
* OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
* This software is not designed or intended for use in on-line control of
* aircraft, air traffic, aircraft navigation or aircraft communications; or in
* the design, construction, operation or maintenance of any nuclear
* facility. Licensee represents and warrants that it will not use or
* redistribute the Software for such purposes.
*/

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import javax.swing.BorderFactory;
import javax.swing.BoxLayout;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JPopupMenu;
/**
* @author ges
* @author kwalrath
*/
/* MenuLayoutDemo.java requires no other files. */
public class Main {
public JMenuBar createMenuBar() {
JMenuBar menuBar = new JMenuBar();
menuBar.setLayout(new BoxLayout(menuBar, BoxLayout.PAGE_AXIS));
menuBar.add(createMenu("Menu 1"));
menuBar.add(createMenu("Menu 2"));
menuBar.add(createMenu("Menu 3"));
menuBar.setBorder(BorderFactory.createMatteBorder(0, 0, 0, 1, Color.BLACK));
return menuBar;
}
// used by createMenuBar
public JMenu createMenu(String title) {
JMenu m = new HorizontalMenu(title);
m.add("Menu item #1 in " + title);
m.add("Menu item #2 in " + title);
m.add("Menu item #3 in " + title);
JMenu submenu = new HorizontalMenu("Submenu");
submenu.add("Submenu item #1");
submenu.add("Submenu item #2");
m.add(submenu);
return m;
}
/**
* Create the GUI and show it. For thread safety, this method should be
* invoked from the event-dispatching thread.
*/
private static void createAndShowGUI() {
// Create and set up the window.
JFrame frame = new JFrame("MenuLayoutDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// Create and set up the content pane.
Main demo = new Main();
Container contentPane = frame.getContentPane();
contentPane.setBackground(Color.WHITE); // contrasting bg
contentPane.add(demo.createMenuBar(), BorderLayout.LINE_START);
// Display the window.
frame.setSize(300, 150);
frame.setVisible(true);
}
public static void main(String[] args) {
// Schedule a job for the event-dispatching thread:
// creating and showing this application"s GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
class HorizontalMenu extends JMenu {
HorizontalMenu(String label) {
super(label);
JPopupMenu pm = getPopupMenu();
pm.setLayout(new BoxLayout(pm, BoxLayout.LINE_AXIS));
}
public Dimension getMinimumSize() {
return getPreferredSize();
}
public Dimension getMaximumSize() {
return getPreferredSize();
}
public void setPopupMenuVisible(boolean b) {
boolean isVisible = isPopupMenuVisible();
if (b != isVisible) {
if ((b == true) && isShowing()) {
// Set location of popupMenu (pulldown or pullright).
// Perhaps this should be dictated by L&F.
int x = 0;
int y = 0;
Container parent = getParent();
if (parent instanceof JPopupMenu) {
x = 0;
y = getHeight();
} else {
x = getWidth();
y = 0;
}
getPopupMenu().show(this, x, y);
} else {
getPopupMenu().setVisible(false);
}
}
}
}
}

</source>

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