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[Java] Lecture - Day 13 ๋ณธ๋ฌธ
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๋ฐ์ํ
๐ฅ Basic Java - Day 13
๋ง์ฐ์ค๋ก ๋ฌธ์์ด ์ด๋์ํค๊ธฐ
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class MouseEventEx extends JFrame {
private JLabel l = new JLabel("hello");
public MouseEventEx() {
setTitle("Mouse Event Example");
setSize(250, 250);
Container c = getContentPane();
c.addMouseListener(new MyMouseListener());
c.setLayout(null);
l.setSize(50, 20);
l.setLocation(30, 30);
c.add(l);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
}
class MyMouseListener implements MouseListener {
@Override
public void mouseClicked(MouseEvent e) {
}
@Override
public void mousePressed(MouseEvent e) {
int x = e.getX();
int y = e.getY();
l.setLocation(x, y);
}
@Override
public void mouseReleased(MouseEvent e) {
}
@Override
public void mouseEntered(MouseEvent e) {
}
@Override
public void mouseExited(MouseEvent e) {
}
}
public static void main(String[] args) {
new MouseEventEx();
}
}
์ด๋ํฐ(Adapter) ํด๋์ค
- ์ด๋ฒคํธ ๋ฆฌ์ค๋ ๊ตฌํ์ ๋ฐ๋ฅธ ๋ถ๋ด์ ํด์ํ๊ธฐ ์ํด ์ฌ์ฉ
- ๋ฆฌ์ค๋ ์์ฑ ์ ์ถ์ ๋ฉ์๋๋ค์ ๋ชจ๋ ๊ตฌํํด์ผ ํ๋ ๋ถ๋ด์ด ์์
- ์ด๋ํฐ ํด๋์ค
- ๋ฆฌ์ค๋์ ๋ชจ๋ ๋ฉ์๋๊ฐ ๋จ์ ๋ฆฌํดํ๋๋ก ๊ตฌํํด๋์ ํด๋์ค
- ์ถ์ ๋ฉ์๋๊ฐ ํ๋๋ฟ์ธ ๋ฆฌ์ค๋๋ ์ด๋ํฐ ํด๋์ค๊ฐ ์์
- ActionAdapter, ItemAdapter ํด๋์ค๋ ์กด์ฌํ์ง ์์
- JDK์์ ์ ๊ณตํ๋ ์ด๋ํฐ ํด๋์ค
- ActionListener: ์์
- ItemListener: ์์
- KeyListener: KeyAdapter
- MouseListener: MouseAdapter
- MouseMotionListener: MouseMotionAdapter or MouseAdapter
- FocusListener: FocusAdapter
- WindowListener: WindowAdapter
- AdjustmentListener: ์์
- ComponentListener: ComponentAdapter
- ContainerListener: ContainerAdapter
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class MouseEventEx extends JFrame {
private JLabel l = new JLabel("hello");
public MouseEventEx() {
setTitle("Mouse Event Example");
setSize(250, 250);
Container c = getContentPane();
c.addMouseListener(new MyMouseListener());
c.setLayout(null);
l.setSize(50, 20);
l.setLocation(30, 30);
c.add(l);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
}
class MyMouseListener extends MouseAdapter {
@Override
public void mousePressed(MouseEvent e) {
int x = e.getX();
int y = e.getY();
l.setLocation(x, y);
}
}
public static void main(String[] args) {
new MouseEventEx();
}
}
- ์ด๋ํฐ๋ฅผ ์ฌ์ฉํ์ฌ ๊ฐ์ ํ ์ฝ๋
Key ์ด๋ฒคํธ์ Focus
- ํค ์
๋ ฅ ์, ๋ค์ ์ธ ๊ฒฝ์ฐ์ Key ์ด๋ฒคํธ ๋ฐ์
- ํค๋ฅผ ๋๋ฅด๋ ์๊ฐ
- ๋๋ฅธ ํค๋ฅผ ๋ผ๋ ์๊ฐ
- ๋๋ฅธ ํค๋ฅผ ๋ผ๋ ์๊ฐ(Unicode ํค์ ๊ฒฝ์ฐ์๋ง)
- ํค ์ด๋ฒคํธ๋ฅผ ๋ฐ์ ์ ์๋ ์กฐ๊ฑด
- ๋ชจ๋ ์ปดํฌ๋ํธ๊ฐ ๊ฐ๋ฅํ์ง๋ง, ํ์ฌ ํฌ์ปค์ค๋ฅผ ๊ฐ์ง ์ปดํฌ๋ํธ
- Focus
- ์ปดํฌ๋ํธ๋ ์์ฉ ํ๋ก๊ทธ๋จ์ด ํค ์ด๋ฒคํธ๋ฅผ ๋ ์ ํ๋ ๊ถํ
- ์ปดํฌ๋ํธ์ ํฌ์ปค์ค ์ค์ ๋ฐฉ๋ฒ
component.setFocusable(true); // component๊ฐ ํฌ์ปค์ค๋ฅผ ๋ฐ์ ์ ์๋๋ก ์ค์
- ์๋ฐ ํ๋ซํผ๋ง๋ค ์คํ ํ๊ฒฝ์ ์ด๊ธฐํ๊ฐ ์๋ก ๋ค๋ฅผ ์ ์๊ธฐ์ ํ์
component.requestFocus(); // component์ ํฌ์ปค์ค ๊ฐ์ ์ง์
setVisible(true);
component.setFocusable(true);
component.requestFocus();
- ์ค์ ํ๋ ์์ด ๋ง๋ค์ด์ง ๋, ํฌ์ปค์ค๋ฅผ ์ฃผ๊ณ ์ ํ๋ ๊ฒฝ์ฐ
- JFrame์ setVisible(true) ์ดํ์ ํฌ์ปค์ค๋ฅผ ์ค์ผ ํจ
component.addMouseListener(new MouseAdapter()) {
public void mouseClicked(MouseEvent e) {
Component c = (Component)e.getSource(); // ํด๋ฆญ๋ ์ปดํฌ๋ํธ
c.setFocusable(true);
c.requestFocus();
}
}
- ๋ง์ฐ์ค๋ก ์ปดํฌ๋ํธ๋ฅผ ํด๋ฆญํ ๋, ํฌ์ปค์ค ์ง์ ๋ฐฉ๋ฒ
- ์ธ์ ๋ ์ง ํ์ํ ๋ ํฌ์ปค์ค๋ฅผ ์ค ์ ์์
KeyListener์ ๋ฉ์๋์ ํค
- ์์ฉ ํ๋ก๊ทธ๋จ์์ KeyListener๋ฅผ ์์๋ฐ์ ํค ๋ฆฌ์ค๋๋ฅผ ๊ตฌํ
- KeyListener์ 3๊ฐ ๋ฉ์๋
- keyPressed : ํค๋ฅผ ๋๋ฅด๋ ์๊ฐ
- keyReleased : ๋๋ฅธ ํค๋ฅผ ๋ผ๋ ์๊ฐ
- keyTyped : ๋๋ฅธ ํค๋ฅผ ๋ผ๋ ์๊ฐ(Unicode)
component.addKeyListener(myKeyListener);
- ์ปดํฌ๋ํธ์ ํค ์ด๋ฒคํธ ๋ฆฌ์ค๋ ๋ฑ๋ก
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class MyKeyEventEx extends JFrame {
private JLabel l = new JLabel("<Enter> ํค๋ก ๋ฐฐ๊ฒฝ์์ด ๋ฐ๋๋๋ค.");
public MyKeyEventEx() {
setTitle("KeyListener Example");
Container c = getContentPane();
c.setLayout(new FlowLayout());
c.add(l);
c.addKeyListener(new MyKeyListener());
setSize(450, 250);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
c.setFocusable(true);
c.requestFocus();
}
public class MyKeyListener extends KeyAdapter {
@Override
public void keyPressed(KeyEvent e) {
int r = (int)(Math.random()*256);
int g = (int)(Math.random()*256);
int b = (int)(Math.random()*256);
if(e.getKeyChar() == '\n') {
l.setText("r="+r+", g="+g+", b="+b);
getContentPane().setBackground(new Color(r, g, b));
} else if(e.getKeyChar() == 'q') {
System.exit(0);
}
}
}
public static void main(String[] args) {
new MyKeyEventEx();
}
}
- ์ ๋ ฅ๋ ๋ฌธ์ ํค ํ๋ณ
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class MyKeyEventEx2 extends JFrame {
private JLabel l = new JLabel("HELLO");
private final int FLYING_UNIT = 10;
public MyKeyEventEx2() {
super("Moving the Text");
Container c = getContentPane();
c.setLayout(null);
c.addKeyListener(new MyKeyListener());
l.setSize(50, 20);
l.setLocation(50, 50);
c.add(l);
setSize(300, 300);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
c.setFocusable(true);
c.requestFocus();
}
public class MyKeyListener extends KeyAdapter {
@Override
public void keyPressed(KeyEvent e) {
switch(e.getKeyCode()) {
case KeyEvent.VK_UP -> l.setLocation(l.getX(), l.getY()-FLYING_UNIT);
case KeyEvent.VK_DOWN -> l.setLocation(l.getX(), l.getY()+FLYING_UNIT);
case KeyEvent.VK_RIGHT -> l.setLocation(l.getX()+FLYING_UNIT, l.getY());
case KeyEvent.VK_LEFT -> l.setLocation(l.getX()-FLYING_UNIT, l.getY());
}
}
}
public static void main(String[] args) {
new MyKeyEventEx2();
}
}
- ์, ํ, ์ข, ์ฐ ํค๋ก ํ ์คํธ ์์ง์ด๊ธฐ
Unicode
- ์ ๋์ฝ๋ ํค์ ํน์ง
- ๊ตญ์ ์ฐ์ ํ์ค
- ์ ์ธ๊ณ์ ๋ฌธ์๋ฅผ ์ปดํจํฐ์์ ์ผ๊ด๋๊ฒ ํํํ๊ธฐ ์ํ ์ฝ๋ ์ฒด๊ณ
- ๋ฌธ์๋ค์ ๋ํด์๋ง ํค ์ฝ๋ ๊ฐ ์ ์
- ๋ฌธ์๊ฐ ์๋ ํค ๊ฒฝ์ฐ์๋ ํ์คํ๋ ํค ์ฝ๋ ๊ฐ ์์(์ ์ดํค)
- ์ ๋์ฝ๋ ํค๊ฐ ์
๋ ฅ๋๋ ๊ฒฝ์ฐ
- keyPressed(), keyTyped(), keyReleased() ๊ฐ ์์๋๋ก ํธ์ถ
- ์ ๋์ฝ๋ ํค๊ฐ ์๋ ๊ฒฝ์ฐ
- keyPressed(), keyReleased() ๋ง ํธ์ถ๋จ
- ๊ฐ์ ํค(Virtual Key)
- ์ ๋์ฝ๋ ํค์ ์๊ด์์ด, ๋ชจ๋ ํค์ ์๋ฐ์ ๊ฐ์ ํค ์ฝ๋๊ฐ ์ ์๋์ด ์์
- ๊ฐ์ ํค ์ฝ๋๋ KeyEvent ํด๋์ค์ ์์๋ก ์ ์ธ
- VK_0 ~ VK_9: 0์์ 9๊น์ง์ ํค(ํด๋น ํค์ ์ ๋์ฝ๋ ๊ฐ๊ณผ ๋์ผ)
- VK_A ~ VK_Z: A์์ Z๊น์ง์ ํค(ํด๋น ์ ๋์ฝ๋ ๊ฐ๊ณผ ๋์ผ)
- VK_F1 ~ VK_F24
- VK_HOME
- VK_END
- VK_PGUP
- VK_PGDN
- VK_UNDEFINED: ์ ๋ ฅ๋ ํค์ ์ฝ๋ ๊ฐ์ ์ ์ ์์
- VK_LEFT
- VK_RIGHT
- VK_UP
- VK_DOWN
- VK_CONTROL
- VK_SHIFT
- VK_ALT
- VK_TAB
- ๊ฐ์ ํค์ ์
๋ ฅ๋ ํค ํ๋ณ
- ํค ์ด๋ฒคํธ๊ฐ ๋ฐ์ํ๋ฉด ์ ๋ ฅ๋ ํค ์ ๋ณด๊ฐ KeyEvent ๊ฐ์ฒด์ ๋ด๊ฒจ ๋ฆฌ์ค๋์ ์ ๋ฌ๋จ
- KeyEvent ๊ฐ์ฒด
- ์ ๋ ฅ๋ ํค ์ ๋ณด๋ฅผ ๊ฐ์ง ์ด๋ฒคํธ ๊ฐ์ฒด
- KeyEvent ๊ฐ์ฒด์ ๋ฉ์๋๋ก ์
๋ ฅ๋ ํค ํ๋ณ
- char getKeyChar()
- ํค์ ์ ๋์ฝ๋ ๋ฌธ์ ๊ฐ ๋ฆฌํด
- Unicode ๋ฌธ์ ํค์ธ ๊ฒฝ์ฐ์๋ง ์๋ฏธ๊ฐ ์์
- ์ ๋ ฅ๋ ํค๋ฅผ ํ๋ณํ๊ธฐ ์ํด ๋ฌธ์ ๊ฐ๊ณผ ๋น๊ตํ๋ฉด ๋จ
- int getKeyCode()
- ์ ๋์ฝ๋ ํค ํฌํจ
- ๋ชจ๋ ํค์ ๋ํ ์ ์ํ ํค ์ฝ๋ ๋ฆฌํด
- ์ ๋ ฅ๋ ํค๋ฅผ ํ๋ณํ๊ธฐ ์ํด ๊ฐ์ ํค ๊ฐ๊ณผ ๋น๊ตํด์ผ ํจ
- ๊ฐ์ ํค ๊ฐ์ KeyEvent ํด๋์ค์ ์์๋ก ์ ์ธ๋จ
- char getKeyChar()
- KeyEvent ๊ฐ์ฒด์ ๋ฉ์๋๋ก ์
๋ ฅ๋ ํค ํ๋ณ
- String getKeyText(int keyCode)
- Static ๋ฉ์๋
- ํค ์ด๋ฆ ๋ฌธ์์ด ๋ฆฌํด
- ๋งค๊ฐ๋ณ์ keyCode์ ์ฝ๋ ๊ฐ(๊ฐ์ ํค)์ ํด๋นํ๋ ํค์ ์ด๋ฆ ๋ฌธ์์ด ๋ฆฌํด
- F1 ํค์ ๊ฒฝ์ฐ "F1", Shift ํค์ ๊ฒฝ์ฐ "SHIFT" ๋ฑ์ ๋ฌธ์์ด ๋ฆฌํด
- String getKeyText(int keyCode)
๋ง์ฐ์ค ์ด๋ฒคํธ์ ๋ง์ฐ์ค ๊ด๋ จ ๋ฆฌ์ค๋
- ๋ง์ฐ์ค ์ด๋ฒคํธ
- ์ฌ์ฉ์์ ๋ง์ฐ์ค ์กฐ์์ ๋ฐ๋ผ ๋ฐ์ํ๋ ์ด๋ฒคํธ
- MouseListener
- ๋ง์ฐ์ค๊ฐ ์ปดํฌ๋ํธ ์์ ์ฌ๋ผ๊ฐ ๋: void mouseEntered(MouseEvent e)
- ๋ง์ฐ์ค๊ฐ ์ปดํฌ๋ํธ์์ ๋ด๋ ค์ฌ ๋: void mouseExited(MouseEvent e)
- ๋ง์ฐ์ค ๋ฒํผ์ด ๋๋ฌ์ก์ ๋: void mousePressed(MouseEvent e)
- ๋๋ฌ์ง ๋ฒํผ์ด ๋ผ์ด์ง ๋: void mouseReleased(MouseEvent e)
- ๋ง์ฐ์ค๋ก ์ปดํฌ๋ํธ๋ฅผ ํด๋ฆญํ์์ ๋: void mouseClicked(MouseEvent e)
- MouseMotionListener
- ๋ง์ฐ์ค๊ฐ ๋๋๊ทธ๋๋ ๋์: void mouseDragged(MouseEvent e)
- ๋ง์ฐ์ค๊ฐ ์์ง์ด๋ ๋์: void mouseMoved(MouseEvent e)
- MouseWheelListener
- ๋ง์ฐ์ค ํ ์ด ๊ตฌ๋ฅด๋ ๋์: void mouseWheelMoved(MouseEvent e)
- MouseListener
- ๋ง์ฐ์ค๊ฐ ๋๋ฌ์ง ์์น์์ ๋ผ์ด์ง๋ ๊ฒฝ์ฐ ๋ฉ์๋ ํธ์ถ ์์
- mousePressed(), mouseReleased(), mouseClicked()
- ๋ง์ฐ์ค๊ฐ ๋๋๊ทธ๋ ๋ ํธ์ถ๋๋ ๋ฉ์๋ ํธ์ถ ์์
- mousePressed(), mouseDragged(), mouseDragged(), ..., mouseDragged(), mouseReleased()
- ์ฌ์ฉ์์ ๋ง์ฐ์ค ์กฐ์์ ๋ฐ๋ผ ๋ฐ์ํ๋ ์ด๋ฒคํธ
- ๋ง์ฐ์ค ๋ฆฌ์ค๋ ๋ฌ๊ธฐ
component.addMouseListener(myMouseListener);
- ๋ง์ฐ์ค ์ด๋ฒคํธ๋ฅผ ์ฒ๋ฆฌํ๋ ๋ง์ฐ์ค ๋ฆฌ์ค๋๋ฅผ ์ปดํฌ๋ํธ์ ๋ฑ๋ก
component.addMouseMotionListener(myMouseMotionListener);
- ์ปดํฌ๋ํธ๊ฐ MouseMotion ์ด๋ฒคํธ๋ฅผ ํจ๊ป ์ฒ๋ฆฌํ๊ณ ์ ํ ๋, ๋ฆฌ์ค๋ ๋ฐ๋ก ๋ฑ๋ก
- MouseEvent ๊ฐ์ฒด๋ก๋ถํฐ ์ป์ ์ ์๋ ์ ๋ณด
- ๋ง์ฐ์ค ํฌ์ธํฐ์ ์์น: int getX(), int getY(), Point getPoint()
- ์ ๋ ฅ๋ ๋ง์ฐ์ค ๋ฒํผ: int getButton()
- ๋ง์ฐ์ค ํด๋ฆญ ํ์: int getClickCount()
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class MyMouseEvent01 extends JFrame {
private JLabel l = new JLabel("Move me");
public MyMouseEvent01() {
setTitle("Click and Dragg");
Container c = getContentPane();
c.setLayout(null);
l.setSize(80, 20);
l.setLocation(80, 50);
MyMouseListener li = new MyMouseListener();
c.addMouseListener(li);
c.addMouseMotionListener(li);
c.add(l);
setSize(500, 400);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
}
public class MyMouseListener implements MouseListener, MouseMotionListener {
@Override
public void mouseClicked(MouseEvent e) {
}
@Override
public void mousePressed(MouseEvent e) {
l.setLocation(e.getX(), e.getY());
setTitle("mousePressed("+e.getX()+", "+e.getY()+")");
}
@Override
public void mouseReleased(MouseEvent e) {
l.setLocation(e.getX(), e.getY());
setTitle("mouseReleased("+e.getX()+", "+e.getY()+")");
}
@Override
public void mouseEntered(MouseEvent e) {
Component c = (Component)e.getSource();
c.setBackground(Color.CYAN);
}
@Override
public void mouseExited(MouseEvent e) {
Component c = (Component)e.getSource();
c.setBackground(Color.YELLOW);
setTitle("mouseExited("+e.getX()+", "+e.getY()+")");
}
@Override
public void mouseDragged(MouseEvent e) {
l.setLocation(e.getX(), e.getY());
setTitle("mouseDragged("+e.getX()+", "+e.getY()+")");
}
@Override
public void mouseMoved(MouseEvent e) {
l.setLocation(e.getX(), e.getY());
setTitle("mouseMoved("+e.getX()+", "+e.getY()+")");
}
}
public static void main(String[] args) {
new MyMouseEvent01();
}
}
- ๋ง์ฐ์ค์ ๋ง์ฐ์ค ๋ชจ์ ์ด๋ฒคํธ ํ์ฉ ์ฝ๋ 1
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class MyMouseEvent02 extends JFrame {
private JLabel l = new JLabel("No Mouse Event");
public MyMouseEvent02() {
super("Mouse Event Example");
Container c = getContentPane();
c.setLayout(new FlowLayout());
MyMouseListener ml = new MyMouseListener();
c.addMouseListener(ml);
c.addMouseMotionListener(ml);
c.add(l);
setSize(500, 400);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
}
public class MyMouseListener implements MouseListener, MouseMotionListener {
@Override
public void mouseClicked(MouseEvent e) {
if(e.getClickCount() == 2) {
int r = (int)(Math.random()*256);
int g = (int)(Math.random()*256);
int b = (int)(Math.random()*256);
Component c = (Component) e.getSource();
c.setBackground(new Color(r, g, b));
}
}
@Override
public void mousePressed(MouseEvent e) {
l.setText("mousePressed("+e.getX()+", "+e.getY()+")");
}
@Override
public void mouseReleased(MouseEvent e) {
l.setText("mouseReleased("+e.getX()+", "+e.getY()+")");
}
@Override
public void mouseEntered(MouseEvent e) {
Component c = (Component)e.getSource();
c.setBackground(Color.CYAN);
}
@Override
public void mouseExited(MouseEvent e) {
Component c = (Component)e.getSource();
c.setBackground(Color.YELLOW);
}
@Override
public void mouseDragged(MouseEvent e) {
l.setText("mouseDragged("+e.getX()+", "+e.getY()+")");
}
@Override
public void mouseMoved(MouseEvent e) {
l.setText("mouseMoved("+e.getX()+", "+e.getY()+")");
}
}
public static void main(String[] args) {
new MyMouseEvent02();
}
}
- ๋ง์ฐ์ค์ ๋ง์ฐ์ค ๋ชจ์ ์ด๋ฒคํธ ํ์ฉ ์ฝ๋ 2
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