Notes

/*
* Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
* Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
*/
package Thursday;

/**
*
* @author admin
*/
import java.awt.Color;
import java.awt.BorderLayout;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.awt.event.MouseEvent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class MouseTrackerFrame extends JFrame {

private final JPanel mousePanel;
private final JLabel statusBar;

public MouseTrackerFrame() {
super("Demonstrating Mouse Events");

mousePanel = new JPanel();
mousePanel.setBackground(Color.WHITE);
add(mousePanel, BorderLayout.CENTER);

statusBar = new JLabel("Mouse outside JPanel");
add(statusBar, BorderLayout.SOUTH);

MouseHandler handler = new MouseHandler();
mousePanel.addMouseListener(handler);
mousePanel.addMouseMotionListener(handler);
}

private class MouseHandler implements MouseListener, MouseMotionListener {

@Override
public void mouseClicked(MouseEvent event) {
statusBar.setText(String.format("Clicked at [%d, %d]",
event.getX(), event.getY()));
}

@Override
public void mousePressed(MouseEvent event) {
statusBar.setText(String.format("Pressed at [%d, %d]",
event.getX(), event.getY()));
}

@Override
public void mouseReleased(MouseEvent event) {
statusBar.setText(String.format("Released at [%d, %d]",
event.getX(), event.getY()));
}

@Override
public void mouseEntered(MouseEvent event) {
statusBar.setText(String.format("Mouse entered at [%d, %d]",
event.getX(), event.getY()));
mousePanel.setBackground(Color.GREEN);
}

@Override
public void mouseExited(MouseEvent event) {
statusBar.setText("Mouse outside JPanel");
mousePanel.setBackground(Color.WHITE);
}
}
}






import javax.swing.JFrame;

public class MouseTracker {

public static void main(String[] args) {
MouseTrackerFrame mouseTrackerFrame = new MouseTrackerFrame();
mouseTrackerFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
mouseTrackerFrame.setSize(300, 100);
mouseTrackerFrame.setVisible(true);
}
}






/*
* Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
* Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
*/
package Thursday;

/**
*
* @author admin
*/
import java.awt.BorderLayout;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JFrame;
import javax.swing.JLabel;

public class MouseDetailsFrame extends JFrame {

private String details;
private final JLabel statusBar;

public MouseDetailsFrame() {
super("Mouse clicks and buttons");

statusBar = new JLabel("Click the mouse");
add(statusBar, BorderLayout.SOUTH);
addMouseListener(new MouseClickHandler());
}

private class MouseClickHandler extends MouseAdapter {

@Override
public void mouseClicked(MouseEvent event) {
int xPos = event.getX();
int yPos = event.getY();

details = String.format("Clicked %d time(s)", event.getClickCount());

if (event.isMetaDown()) {
details += " with right mouse button";
} else if (event.isAltDown()) {
details += " with center mouse button";
} else {
details += " with left mouse button";
}

statusBar.setText(details);
}
}
}





/*
* Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
* Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
*/
package Thursday;

/**
*
* @author admin
*/
import javax.swing.JFrame;

public class MouseDetails {

public static void main(String[] args) {
MouseDetailsFrame mouseDetailsFrame = new MouseDetailsFrame();
mouseDetailsFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
mouseDetailsFrame.setSize(400, 150);
mouseDetailsFrame.setVisible(true);
}

}



/*
* Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
* Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
*/
package Thursday;

/**
*
* @author admin
*/
import java.awt.Point;
import java.awt.Graphics;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import java.util.ArrayList;
import javax.swing.JPanel;

public class PaintPanel extends JPanel {

private final ArrayList<Point> points = new ArrayList<>();

public PaintPanel() {
addMouseMotionListener(
new MouseMotionAdapter() {
@Override
public void mouseDragged(MouseEvent event) {
points.add(event.getPoint());
repaint();

}
}
);
}

@Override
public void paintComponent(Graphics g) {
super.paintComponent(g);

for (Point point : points) {
g.fillOval(point.x, point.y, 4, 4);
}
}
}





/*
* Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
* Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
*/
package Thursday;

/**
*
* @author admin
*/
import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;

public class Painter {

public static void main(String[] args) {
JFrame application = new JFrame("A simple paint program");
PaintPanel paintPanel = new PaintPanel();

application.add(paintPanel, BorderLayout.CENTER);

application.add(new JLabel("Drag the mouse to draw"),
BorderLayout.SOUTH);

application.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
application.setSize(400, 200);
application.setVisible(true);
}
}