в 17:44, 31 мая 2010

2010-05-31T17:44:27Z

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2010-05-31T15:32:33Z

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== CardLayout methods ==

MethodDescriptionvoid previous(Container parent)Selects the previous componentvoid first(Container parent)Selects the first componentvoid last(Container parent)Selects the last componentvoid show(Container parent, String name)Selects the component associated with the String object name.

== Using a CardLayout Manager ==



<source lang="java">
import java.awt.CardLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class TryCardLayout extends JPanel implements ActionListener {
CardLayout card = new CardLayout(50, 50); // Create layout
public TryCardLayout() {
setLayout(card);
JButton button;
for (int i = 1; i <= 6; i++) {
add(button = new JButton(" Press " + i), "Card" + i); // Add a button
button.addActionListener(this); // Add listener for button
}
}
// Handle button events
public void actionPerformed(ActionEvent e) {
card.next(this); // Switch to the next card
}
public static void main(String[] args) {
JFrame aWindow = new JFrame();
aWindow.setBounds(30, 30, 300, 300);
aWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
aWindow.getContentPane().add(new TryCardLayout());
aWindow.setVisible(true);
}
}</source>



== What is the CardLayout ==

<OL><LI>Place components like a deck of cards.</LI><LI>Only the "top" component is visible at any one time.</LI></OL>



<source lang="java">
import java.awt.CardLayout;
import java.awt.Color;
import java.awt.Container;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class CardLayoutBehaviour extends JFrame {
protected CardLayout layout;
public static void main(String[] args) {
CardLayoutBehaviour ct = new CardLayoutBehaviour();
ct.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
ct.displayTab("Green Tab");
ct.setSize(400, 300);
ct.setVisible(true);
}
public CardLayoutBehaviour() {
JPanel tab;
Container pane = getContentPane();
layout = new CardLayout();
pane.setLayout(layout);
tab = new JPanel();
tab.setBackground(Color.red);
pane.add(tab, "Red Tab");
tab = new JPanel();
tab.setBackground(Color.green);
pane.add(tab, "Green Tab");
tab = new JPanel();
tab.setBackground(Color.blue);
pane.add(tab, "Blue Tab");
}
public void displayTab(String name) {
layout.show(this.getContentPane(), name);
}
}</source>

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в 17:44, 31 мая 2010

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