JAVA - Circle Button

 

package circlebutton;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.JLabel;

import javax.swing.JButton;

import java.awt.event.ActionListener;

import java.awt.event.ActionEvent;

public class GuiMain{

public static void main(String[] args){

JFrame frame = new JFrame("Circle Button Demo");

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

JLabel circleLabel = new JLabel("Exciting circle button:");

CircleButton circleButton = new CircleButton("Click me!");

circleButton.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent e){

System.out.println("Clicked!");

}

});

JLabel normalLabel = new JLabel("Boring square button:");

JButton normalButton = new JButton("Okay");

JPanel panel = new JPanel();

panel.add(circleLabel);

panel.add(circleButton);

panel.add(normalLabel);

panel.add(normalButton);

frame.add(panel);

frame.setSize(300, 150);

frame.setVisible(true);

}

}

=================================================

package circlebutton;

import javax.swing.JButton;

import java.awt.Graphics;

import java.awt.Color;

import java.awt.Dimension;

import java.awt.geom.Point2D;

import java.awt.FontMetrics;

import java.awt.event.MouseAdapter;

import java.awt.event.MouseEvent;

public class CircleButton extends JButton{

private boolean mouseOver = false;

private boolean mousePressed = false;

public CircleButton(String text){

super(text);

setOpaque(false);

setFocusPainted(false);

setBorderPainted(false);

MouseAdapter mouseListener = new MouseAdapter(){

@Override

public void mousePressed(MouseEvent me){

if(contains(me.getX(), me.getY())){

mousePressed = true;

repaint();

}

}

@Override

public void mouseReleased(MouseEvent me){

mousePressed = false;

repaint();

}

@Override

public void mouseExited(MouseEvent me){

mouseOver = false;

mousePressed = false;

repaint();

}

@Override

public void mouseMoved(MouseEvent me){

mouseOver = contains(me.getX(), me.getY());

repaint();

}

};

addMouseListener(mouseListener);

addMouseMotionListener(mouseListener);

}

private int getDiameter(){

int diameter = Math.min(getWidth(), getHeight());

return diameter;

}

@Override

public Dimension getPreferredSize(){

FontMetrics metrics = getGraphics().getFontMetrics(getFont());

int minDiameter = 10 + Math.max(metrics.stringWidth(getText()), metrics.getHeight());

return new Dimension(minDiameter, minDiameter);

}

@Override

public boolean contains(int x, int y){

int radius = getDiameter()/2;

return Point2D.distance(x, y, getWidth()/2, getHeight()/2) < radius;

}

@Override

public void paintComponent(Graphics g){

int diameter = getDiameter();

int radius = diameter/2;

if(mousePressed){

g.setColor(Color.LIGHT_GRAY);

}

else{

g.setColor(Color.WHITE);

}

g.fillOval(getWidth()/2 - radius, getHeight()/2 - radius, diameter, diameter);

if(mouseOver){

g.setColor(Color.BLUE);

}

else{

g.setColor(Color.BLACK);

}

g.drawOval(getWidth()/2 - radius, getHeight()/2 - radius, diameter, diameter);

g.setColor(Color.BLACK);

g.setFont(getFont());

FontMetrics metrics = g.getFontMetrics(getFont());

int stringWidth = metrics.stringWidth(getText());

int stringHeight = metrics.getHeight();

g.drawString(getText(), getWidth()/2 - stringWidth/2, getHeight()/2 + stringHeight/4);

}

}

===============================

comment

In the frame class:

       CircleButton JButtonMusic=new CircleButton("");
       //JButtonMusic.setContentAreaFilled(false);
       JButtonMusic.setFocusPainted(false);
       JButtonMusic.setBorderPainted(false);
       JButtonMusic.setSize(120,70);
       imageIcon2 = new ImageIcon(musicIcon); // load the image to a imageIcon
       
       image2 = imageIcon2.getImage(); // transform it 
       newimg2 = image2.getScaledInstance(30, 30,  java.awt.Image.SCALE_SMOOTH); // scale it the smooth way  
       imageIcon2 = new ImageIcon(newimg2);  // transform it back
       JButtonMusic.setIcon( imageIcon2); 

              
       JButtonMusic.setLocation(1050,710);
       
       add(JButtonMusic);