Java 87. Xử lý các sự kiện của chuột máy tính | Lập trình Java

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Video giải thích chi tiết

 Code chi tiết 

package model;

public class MouseExampleModel {
	private int x, y;
	private int count;
	private String checkIn; // yes, no
	
	public MouseExampleModel() {
		this.x = 0;
		this.y = 0;
		this.count = 0;
		this.checkIn = "no";
	}

	public int getX() {
		return x;
	}

	public void setX(int x) {
		this.x = x;
	}

	public int getY() {
		return y;
	}

	public void setY(int y) {
		this.y = y;
	}

	public int getCount() {
		return count;
	}

	public void setCount(int count) {
		this.count = count;
	}

	public String getCheckIn() {
		return checkIn;
	}

	public void setCheckIn(String checkIn) {
		this.checkIn = checkIn;
	}
	
	public void addClick() {
		this.count++;
	}
	
	public void enter() {
		this.checkIn = "yes";
	}
	
	public void exit() {
		this.checkIn = "no";
	}
	
}




package view;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.HeadlessException;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

import controller.MouseExampleController;
import model.MouseExampleModel;

public class MouseExampleView extends JFrame{
	private MouseExampleModel model;
	private JPanel jPanel_mouse;
	private JLabel jLabel_position;
	private JLabel jLabel_x;
	private JLabel jLabel_y;
	private JLabel jLabel_count;
	private JLabel jLabel_count_value;
	private JLabel jLabel_empty_1;
	private JLabel jLabel_check_in;
	private JLabel jLabel_check_in_value;
	private JLabel jLabel_empty_2;

	public MouseExampleView() throws HeadlessException {
		this.model = new MouseExampleModel();
		this.init();
	}

	private void init() {
		this.setTitle("MOUSE EXAMPLE");
		this.setSize(600, 500);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		this.setLocationRelativeTo(null);
		
		
		MouseExampleController mouseExampleController = new MouseExampleController(this);
		 
		jPanel_mouse = new JPanel();
		jPanel_mouse.setBackground(Color.cyan);
		jPanel_mouse.addMouseListener(mouseExampleController);
		jPanel_mouse.addMouseMotionListener(mouseExampleController);
		
		JPanel jPanel_info = new JPanel();
		jPanel_info.setLayout(new GridLayout(3, 3));
		
		Font font = new Font("Arial", Font.BOLD, 40);
		jLabel_position = new JLabel("Position: ");
		jLabel_position.setFont(font);
		jLabel_x = new JLabel("x = ");
		jLabel_x.setFont(font);
		jLabel_y =  new JLabel("y = ");
		jLabel_y.setFont(font);
		jLabel_count = new JLabel("Number of clicks: ");
		jLabel_count.setFont(font);
		jLabel_count_value = new JLabel("n");
		jLabel_count_value.setFont(font);
		jLabel_empty_1 = new JLabel();
		jLabel_empty_1.setFont(font);
		jLabel_check_in = new JLabel("Mouse is in component:");
		jLabel_check_in.setFont(font);
		jLabel_check_in_value = new JLabel("no");
		jLabel_check_in_value.setFont(font);
		jLabel_empty_2 = new JLabel();
		jLabel_empty_2.setFont(font);
		jPanel_info.add(jLabel_position);
		jPanel_info.add(jLabel_x);
		jPanel_info.add(jLabel_y);
		jPanel_info.add(jLabel_count);
		jPanel_info.add(jLabel_count_value);
		jPanel_info.add(jLabel_empty_1);
		jPanel_info.add(jLabel_check_in);
		jPanel_info.add(jLabel_check_in_value);
		jPanel_info.add(jLabel_empty_2);
		
		
		this.setLayout(new BorderLayout());
		this.add(jPanel_mouse, BorderLayout.CENTER);
		this.add(jPanel_info, BorderLayout.SOUTH);
		this.setVisible(true);
	}
	
	public void click() {
		this.model.addClick();
		this.jLabel_count_value.setText(this.model.getCount()+"");
	}
	
	public void enter() {
		this.model.enter();
		this.jLabel_check_in_value.setText(this.model.getCheckIn());
	}
	public void exit() {
		this.model.exit();
		this.jLabel_check_in_value.setText(this.model.getCheckIn());
	}
	public void update(int x, int y) {
		this.model.setX(x);
		this.model.setY(y);
		this.jLabel_x.setText(this.model.getX()+"");
		this.jLabel_y.setText(this.model.getY()+"");
	}
}




package controller;

import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;

import view.MouseExampleView;

public class MouseExampleController implements MouseListener, MouseMotionListener{
	private MouseExampleView mouseExampleView;
	
	
	public MouseExampleController(MouseExampleView mouseExampleView) {
		this.mouseExampleView = mouseExampleView;
	}

	@Override
	public void mouseClicked(MouseEvent e) {
		this.mouseExampleView.click();
	}

	@Override
	public void mousePressed(MouseEvent e) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void mouseReleased(MouseEvent e) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void mouseEntered(MouseEvent e) {
		this.mouseExampleView.enter();
		int x = e.getX();
		int y =  e.getY();
		this.mouseExampleView.update(x, y);
	}

	@Override
	public void mouseExited(MouseEvent e) {
		this.mouseExampleView.exit();
	}

	@Override
	public void mouseDragged(MouseEvent e) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void mouseMoved(MouseEvent e) {
		int x = e.getX();
		int y = e.getY();
		this.mouseExampleView.update(x, y);
	}

}




package test;

import javax.swing.UIManager;

import view.MouseExampleView;

public class Test {
	public static void main(String[] args) {
		try {
			UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
			new MouseExampleView();
		} catch (Exception ex) {
			ex.printStackTrace();
		}	
	}
}