I have this program in which I'm using CardLayout. I have different panels with different attributes. I have a button called "Enter" that I decided to reuse on every panel, however each panel performs a different operation when the button is clicked. Is there a way to say, when button is clicked but I am at a specific panel, then do this. How can I point directly to a panel?
First thing you must consider is: You can't add one button to many panels, every panel should have it's own component(s).
If you add one button to many panels say :
JButton b = new JButton("Button");
//....
pan1.add(b);
pan2.add(b);
pan3.add(b);
In such case, the button will be added to the last panel means pan3
, the other won't show the button.
Second, I would like to mention a @trashgod's
good example from comments, and also in case confusing, look at this example:
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
public class CardLayoutDemo extends JFrame implements ActionListener {
private CardLayout cardLayout;
private JButton pan1,pan2;
private JPanel mainPanel;
public CardLayoutDemo(){
cardLayout = new CardLayout();
mainPanel = new JPanel(cardLayout);
JPanel p1 = new JPanel();
JPanel p2 = new JPanel();
pan1 = new JButton("To Second Panel");
pan2= new JButton ("To First Panel");
pan1.addActionListener(this);
pan2.addActionListener(this);
p1.setBackground(Color.green);
p2.setBackground(Color.BLUE.brighter());
p1.add(pan1);
p2.add(pan2);
mainPanel.add(p1,"1");
mainPanel.add(p2,"2");
cardLayout.show(mainPanel, "1");
add(mainPanel);
setDefaultCloseOperation(3);
setLocationRelativeTo(null);
setVisible(true);
pack();
}
@Override
public void actionPerformed(ActionEvent ev){
if(ev.getSource()==pan1)
cardLayout.show(mainPanel, "2");
else if(ev.getSource()==pan2)
cardLayout.show(mainPanel, "1");
}
public static void main(String...args){
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new CardLayoutDemo().setVisible(true);
}
});
}
}