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AWT & Event

AWT & Event. 김영원 ywkim@cs.chonbuk.ac.kr. AWT 시작하기. import java.awt.*; public class TestButton extends Frame{ /*Button b; TestButton(){ b= new Button("OK"); add(b); }*/ public static void main(String[] args){ Frame f = new TestButton(); //f.pack();

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AWT & Event

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  1. AWT & Event 김영원ywkim@cs.chonbuk.ac.kr

  2. AWT 시작하기 import java.awt.*; public class TestButton extends Frame{ /*Button b; TestButton(){ b= new Button("OK"); add(b); }*/ public static void main(String[] args){ Frame f = new TestButton(); //f.pack(); //f.setSize(500,500); f.setVisible(true); } } 전북대학교 컴퓨터 비젼실

  3. 컴포넌트간의 위치조정 • java.awt.BorderLayout • java.awt.FlowLayout • java.awt.GridLayout • java.awt.CardLayout • java.awt.GridBagLayout • LayoutManager 없이 배치하기 전북대학교 컴퓨터 비젼실

  4. BorderLayout import java.awt.*; public class BorderLayoutTest extends Frame{ public BorderLayoutTest() { add(new Button("Center"), BorderLayout.CENTER); add(new Button("East"), BorderLayout.EAST); add(new Button("South"), "South"); add(new Button("West"), "West"); add(new Button("north"), "North"); } public static void main(String[] args){ Frame f = new BorderLayoutTest(); f.pack(); f.setVisible(true); } } 전북대학교 컴퓨터 비젼실

  5. FlowLayout import java.awt.*; public class FlowLayoutTest extends Frame{ public FlowLayoutTest() { FlowLayout flow = new FlowLayout(); setLayout(flow); add(new Button(“b1")); add(new Button(“b2")); add(new Button(“b3")); } public static void main(String[] args){ Frame f = new FlowLayoutTest(); f.pack(); f.setVisible(true); } } // GridLayout grid = new GridLayout(3, 2); 전북대학교 컴퓨터 비젼실

  6. import java.awt.*; publicclass MyLabel extends Frame{ public MyLabel(){ setLayout(new GridLayout(3,1)); Label left = new Label("왼쪽 정렬"); Label center = new Label("가운데 정렬",Label.CENTER); Label right = new Label("오른쪽 정렬",Label.RIGHT); add(left); add(center); add(right); } publicstaticvoid main(String[] args){ MyLabel ML = new MyLabel(); ML.setSize(500,500); ML.setVisible(true); } } 전북대학교 컴퓨터 비젼실

  7. LayoutManager 없이 배치하기 import java.awt.*; public class NoLayoutTest extends Frame{ public NoLayoutTest() { setLayout(null); TextField tf = new TextField(); tf.setBounds(10, 60, 80, 30); add(tf); Button b = new Button(“Button”)); b.setBounds(50, 25, 40, 40); } public static void main(String[] args){ Frame f = new NOLayoutTest(); f.setBounds(100, 50, 100, 100); f.setVisible(true); } } 전북대학교 컴퓨터 비젼실

  8. import java.awt.*; publicclass TestScrollPane extends Frame{ public TestScrollPane(){ setLayout(new BorderLayout()); ScrollPane pane = new ScrollPane(); add("Center",pane); MyCanvas can = new MyCanvas(); can.setSize(500,500); pane.add(can); } publicstaticvoid main(String[] args){TestScrollPane sp = new TestScrollPane(); sp.setSize(200,200); sp.setVisible(true); } } class MyCanvas extends Canvas{ publicvoid paint(Graphics g){ g.setColor(Color.red); g.fillOval(30,30,100,100); } } 전북대학교 컴퓨터 비젼실

  9. // 연습해보기 1 public TestCheckbox(){ Panel p1 = new Panel(); p1.setLayout(new GridLayout(3,1)); p1.add(new Checkbox("first")); p1.add(new Checkbox("second")); p1.add(new Checkbox("third")); add(p1); Panel p2 = new Panel(); pe.setLayout(new GridLayout(3,1)); CheckboxGroup cbg = new CheckboxGroup(); p2.add(new Checkbox("one",cbg, true)); p2.add(new Checkbox("two",cbg, false)); p2.add(new Checkbox("three",cbg, false)); add(p2); } 전북대학교 컴퓨터 비젼실

  10. // 연습해보기 2 public TestScrollbar(){ Scrollbar sb1,sb2; setLayout(new BorderLayout()); sb1 = new Scrollbar(Scrollbar.VERTICAL,0,30,0,60); sb2 = new Scrollbar(Scroolbar.HORIZONTAL); add(sb1,"East"); add(sb2."South"); } 전북대학교 컴퓨터 비젼실

  11. Event 란? • Event • GUI에 대해서 발생하는 Key 입력 • Mouse Click과 같은 동작 전북대학교 컴퓨터 비젼실

  12. 리스너 인터페이스 전북대학교 컴퓨터 비젼실

  13. 전북대학교 컴퓨터 비젼실

  14. Event Handler class를 따로 구현하는 방법 import java.awt.*; import java.awt.event.*; publicclass EventOther extends Frame{ public EventOther(){ Button b = new Button("Test"); add("Center", b); b.addActionListener(new MyHandler()); } publicstaticvoid main(String[] args) { EventOther eo = new EventOther (); eo.setSize(100, 100); eo.setVisible(true); } } class MyHandler implements ActionListener { publicvoid actionPerformed(ActionEvent ev) { System.out.println(ev.getActionCommand()); } } 전북대학교 컴퓨터 비젼실

  15. 자기 자신 Event Handler가 되는 경우 import java.awt.*; import java.awt.event.*; publicclass EventMe extends Frame implements ActionListener{ Button b; EventMe(){ Button b = new Button("EventMeButton"); add("Center", b); b.addActionListener(this); } publicstaticvoid main(String[] args) { EventMe em = new EventMe(); em.setSize(200, 100); em.setVisible(true); } publicvoid actionPerformed(ActionEvent ev) { System.out.println(ev.getActionCommand()); } } 전북대학교 컴퓨터 비젼실

  16. EventHandler Class를 inner class로 작성하는 경우 import java.awt.*; import java.awt.event.*; publicclass EventInner extends Frame{ EventInner(){ Button b = new Button("EventInnerButton"); add("Center", b); b.addActionListener(new EventInnerListener()); } publicstaticvoid main(String[] args) { EventInner ea = new EventInner(); ea.setSize(200, 100); ea.setVisible(true); } class EventInnerListener implements ActionListener{ publicvoid actionPerformed(ActionEvent ev) { System.out.println(ev.getActionCommand()); } } } 전북대학교 컴퓨터 비젼실

  17. EventHandler Class를 Anonymous class로 작성하는 경우 import java.awt.*; import java.awt.event.*; publicclass EventAnony extends Frame { public EventAnony(){ Button b = new Button("Test"); add("Center", b); b.addActionListener(new ActionListener() { publicvoid actionPerformed(ActionEvent ev){ System.out.println(ev.getActionCommand()); } } ); } publicstaticvoid main(String[] args) { EventAnony ea = new EventAnony(); ea.setSize(100, 100); ea.setVisible(true); } } 전북대학교 컴퓨터 비젼실

  18. import java.awt.*; import java.awt.event.*; publicclass TwoListen extends Frame implements MouseMotionListener,MouseListener{ private TextField tf; publicstaticvoid main(String args[]) { TwoListen two = new TwoListen(); two.setSize(300, 200); two.setVisible(true); } public TwoListen() { add(new Label("Click and drag the mouse"), "North"); tf = new TextField(30); add(tf, "South"); addMouseMotionListener(this); addMouseListener(this); } publicvoid mouseDragged(MouseEvent e) { String s = "Mouse dragging: X = " + e.getX() +"Y = " + e.getY(); tf.setText(s); } publicvoid mouseMoved(MouseEvent e){} publicvoid mouseClicked(MouseEvent e){} publicvoid mouseEntered(MouseEvent e){ String s = "The mouse entered"; tf.setText(s); } publicvoid mouseExited(MouseEvent e) { String s = "The mouse has left the building"; tf.setText(s); } publicvoid mousePressed(MouseEvent e){} publicvoid mouseReleased(MouseEvent e){} } 전북대학교 컴퓨터 비젼실

  19. Adapters로 구현하는 방법 publicclass EventListenrTest extends Frame { EventListenrTest (){ b = new Button("Test"); b.addMouseListener(new MyHandler()); } publicstaticvoid main(String[] args) { EventListenerTest elt = new EventListenerTest(); } } class MyHandler implements MouseListener { publicvoid mouseClicked(MouseEvent ev) { System.out.println("TestButton is pressed "); } publicvoid mouseEntered(MouseEvent ev) { } publicvoid mouseExited(MouseEvent ev) { } publicvoid mousePressed(MouseEvent ev) { } publicvoid mouseReleased(MouseEvent ev) { } } 전북대학교 컴퓨터 비젼실

  20. 리스너 & 어댑터 클래스 전북대학교 컴퓨터 비젼실

  21. Adapter class로 Handler class를 만들어 사용하는 방법 import java.awt.*; import java.awt.event.*; publicclass AdapterOther extends Frame { public AdapterOther(){ Button b = new Button("Test"); add(b, "South"); b.addMouseListener(new MyHandler()); } publicstaticvoid main(String[] args) { AdapterOther ao = new AdapterOther(); ao.setSize(100, 100); ao.setVisible(true); } } class MyHandler extends MouseAdapter{ publicvoid mouseClicked(MouseEvent ev) { System.out.println("TestButton is pressed"); } } 전북대학교 컴퓨터 비젼실

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