в 17:43, 31 мая 2010

2010-05-31T17:43:48Z

Admin: 1 версия

2010-05-31T14:23:42Z

1 версия

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== Container: addPropertyChangeListener(PropertyChangeListener listener) ==



<source lang="java">

import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.io.File;
import javax.swing.JFileChooser;
public class Main {
public static void main(String[] argv) throws Exception {
JFileChooser chooser = new JFileChooser();
chooser.addPropertyChangeListener(new PropertyChangeListener() {
public void propertyChange(PropertyChangeEvent evt) {
if (JFileChooser.SELECTED_FILE_CHANGED_PROPERTY.equals(evt.getPropertyName())) {
JFileChooser chooser = (JFileChooser) evt.getSource();
File oldFile = (File) evt.getOldValue();
File newFile = (File) evt.getNewValue();

File curFile = chooser.getSelectedFile();
}
}
});
}
}

</source>



== Container: getComponentCount() ==



<source lang="java">

import java.awt.ruponent;
import java.awt.ruponentOrientation;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JMenu;
public class MainClass extends JFrame {
public MainClass() {
super("MainClass");
Container contentPane = getContentPane();
contentPane.setLayout(new FlowLayout());
contentPane.add(new JButton("OK"));
contentPane.add(new JButton("Cancel"));
applyOrientation(this, ComponentOrientation.RIGHT_TO_LEFT);
}
public static void main(String[] argv) {
JFrame frame = new MainClass();
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
frame.pack();
frame.setVisible(true);
}
private void applyOrientation(Component c, ComponentOrientation o) {
c.setComponentOrientation(o);
if (c instanceof JMenu) {
JMenu menu = (JMenu) c;
int ncomponents = menu.getMenuComponentCount();
for (int i = 0; i < ncomponents; ++i) {
applyOrientation(menu.getMenuComponent(i), o);
}
} else if (c instanceof Container) {
Container container = (Container) c;
int ncomponents = container.getComponentCount();
for (int i = 0; i < ncomponents; ++i) {
applyOrientation(container.getComponent(i), o);
}
}
}
}

</source>



== Container: getFocusTraversalPolicy() ==



<source lang="java">

import java.awt.ruponent;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.FocusTraversalPolicy;
import java.awt.KeyboardFocusManager;
import javax.swing.JButton;
import javax.swing.JFrame;
public class Main {
public static void main(String[] argv) {
JFrame frame = new JFrame();
JButton component1 = new JButton("1");
JButton component2 = new JButton("2");
JButton component3 = new JButton("3");
frame.setLayout(new FlowLayout());
frame.add(component1);
frame.add(component2);
frame.add(component3);
frame.pack();
frame.setVisible(true);
System.out.println(findNextFocus().getName());
}
public static Component findNextFocus() {
Component c = KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusOwner();
Container root = c.getFocusCycleRootAncestor();
FocusTraversalPolicy policy = root.getFocusTraversalPolicy();
Component nextFocus = policy.getComponentAfter(root, c);
if (nextFocus == null) {
nextFocus = policy.getDefaultComponent(root);
}
return nextFocus;
}
}

</source>



== Container: setFocusTraversalPolicy(FocusTraversalPolicy policy) ==



<source lang="java">

import java.awt.ruponent;
import java.awt.Container;
import java.awt.FocusTraversalPolicy;
import java.awt.GridLayout;
import java.util.Arrays;
import java.util.ruparator;
import java.util.List;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.SortingFocusTraversalPolicy;
public class Main {
public static void main(String args[]) {
JFrame frame = new JFrame("Reverse Sample");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new GridLayout(3, 3));
for (int i = 0; i < 9; i++) {
JButton button = new JButton(Integer.toString(i));
frame.add(button);
}
final Container contentPane = frame.getContentPane();
Comparator<Component> comp = new Comparator<Component>() {
public int compare(Component c1, Component c2) {
Component comps[] = contentPane.getComponents();
List list = Arrays.asList(comps);
int first = list.indexOf(c1);
int second = list.indexOf(c2);
return second - first;
}
};
FocusTraversalPolicy policy = new SortingFocusTraversalPolicy(comp);
frame.setFocusTraversalPolicy(policy);
frame.setSize(300, 200);
frame.setVisible(true);
}
}

</source>

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в 17:43, 31 мая 2010

Admin: 1 версия