CODEWITHSUNDEEP
javaswingjpaneljbutton
Luc Peetersen
Luc Peetersen

Reputation: 133

How can I make a JPanel appear when I click a JButton?

I have a ColorChooser panel, how can I make that appear when I click a JButton in my program? EDIT: I want to make it appear in a new frame that is resizable, movable and closable.

Upvotes: 2

Views: 2071

Answers (2)

Roger
Roger

Reputation: 2952

You need to write an ActionListener for your JButton.

Something like this:

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;

/**
 *
 * @author roger
 */
public class MyActListener extends JFrame implements ActionListener{

    public MyActListener(){
        super("My Action Listener");

        JButton myButton = new JButton("DisplayAnything");
        myButton.addActionListener(this);
        this.add(myButton);


        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        this.pack();
        this.setVisible(true);        
    }

    public static void main(String[] args) {
        // TODO code application logic here
        MyActListener ma = new MyActListener();
    }

    @Override
public void actionPerformed(ActionEvent e) { // YOur code for your button here
    if("DisplayAnything".equals(e.getActionCommand())){
        Color c = JColorChooser.showDialog(this, "Color Chooser", Color.BLACK);
        JButton displayAnything = (JButton)e.getSource();
        displayAnything.setBackground(c);
    }
}

Take a look at the Java tutorials of How to write an ActionListener. Look at the really big index in there to see basic tutorials about java in general.

Upvotes: 1

evanwong
evanwong

Reputation: 5134

You can look at the Java Swing Tutorial - ColorChooserDemo2: http://docs.oracle.com/javase/tutorial/uiswing/components/colorchooser.html#advancedexample

Basically, JColorChoose can be shown in a dialog: http://docs.oracle.com/javase/6/docs/api/javax/swing/JColorChooser.html

Color newColor = JColorChooser.showDialog(
                 ColorChooserDemo2.this,
                 "Choose Background Color",
                 banner.getBackground());

For the button to activate this file chooser:

button.addActionListener(new ActionListener(){  
    public void actionPerformed(ActionEvent e) {  
    //color is whatever the user choose  
        Color color = JColorChooser.showDialog(currentComponent, "Color Chooser", Color.WHITE);  

        JButton thisBtn = (JButton)e.getSource(); //or you can just use button if that's final or global
        thisBtn.setBackground(color);
    }  
});

Upvotes: 2

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