Applet 7 image_j_panel

การใชงาน Image และ JPanelพื้นฐานการใชงาน ImageIcon

ตัวอยางหนาจอการทำงาน (http://202.44.47.108/~ssc/image-jpanel/testImageIcon.html)

testImageIcon.html<html>! <body> <h1>Test ImageIcon</h1> <h3>Create by: 5366261111 Supaporn Simcharoen IT1-RC</h3>! ! <applet code="testImageIcon.class" height="350" width="600">! ! </applet>! </body></html>

testImageIcon.javaขั้นตอนท่ี 1 สราง Class พรอมกับ import package ที่ตองใช และสราง Method ที่นาจะมี

import java.awt.*;import javax.swing.*;

public class testImageIcon extends JApplet {! public void init () {! }! public void paint(Graphics g) {! }}

ขั้นตอนท่ี 2 ประกาศตัวแปร ImageIconprivate ImageIcon image1, image2, image3;

ขั้นตอนท่ี 3 สราง ImageIcon ขึ้นมา! public void init()! {! ! image1 = new ImageIcon( getClass().getResource("/htb-8.png") );! ! image2 = new ImageIcon( getClass().getResource("/htb-16.png") );! ! image3 = new ImageIcon( getClass().getResource("/htb-35.png") );! }

ขั้นตอนท่ี 4 แสดงผล ImageIcon ออกมา! public void paint( Graphics g ) {! ! image1.paintIcon( this, g, 0, 0 );! ! image2.paintIcon( this, g, 160, 0 );! ! image3.paintIcon( this, g, 320, 0 );

! ! g.setFont(new Font("Tahoma",Font.BOLD, 14));! ! g.setColor(Color.BLUE);

! ! g.drawString("Width = " + image1.getIconWidth() + " pixel", 10, 180);! ! g.drawString("Height = " + image1.getIconHeight() + " pixel", 10, 200);

! ! g.drawString("Width = " + image2.getIconWidth() + " pixel", 170, 180);! ! g.drawString("Height = " + image2.getIconHeight() + " pixel", 170, 200);! ! g.drawString("Width = " + image3.getIconWidth() + " pixel", 330, 260);! ! g.drawString("Height = " + image3.getIconHeight() + " pixel", 330, 280);! }

ขั้นตอนท่ี 5 ทดลอง Compile และ Run ผลPage 1 of 5

ssc

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Note :: ................................................................

การใชงาน ImageIcon และ JPanel แบบ Composition

ตัวอยางหนาจอการทำงาน (http://202.44.47.108/~ssc/image-jpanel/testImageJPanel.html)

Picture.javaimport java.awt.*;import javax.swing.*;

public class Picture {

! private ImageIcon image;! private int x, y;

! public Picture(String fname) {! ! image = new ImageIcon(getClass().getResource(fname));! }! public void draw( JPanel jPanel ) {! ! image.paintIcon( jPanel , jPanel.getGraphics(), x, y );! }! public void position(int x, int y) {! ! this.x = x;! ! this.y = y;! }! public void clear(JPanel jPanel) {! ! jPanel.paint(jPanel.getGraphics());! }}

Class Picture มีไวเพ่ือ .........................................................................................................................................................testImageJPanel.html<html>! <body> <h1>Test Image and JPanel</h1> <h3>Create by: 5366261111 Supaporn Simcharoen IT1-RC</h3>! ! <applet code="testImageJPanel.class" height="350" width="500">! ! </applet>! </body></html>

testImageJPanel.javaขั้นตอนท่ี 1 สราง Class พรอมกับ import package ที่ตองใช และสราง Method ที่นาจะมี

import java.awt.*;import javax.swing.*;import java.awt.event.*;

public class testImageJPanel extends JApplet implements ActionListener{

! public void init() {! }! public void paint( Graphics g ) {! }! public void actionPerformed(ActionEvent e) {! }}

ขั้นตอนท่ี 2 ประกาศคาตางๆ

! private Picture image1, image2, image3;! private JPanel guiPanel, graphicsPanel;! private JButton btn1, btn2, btn3, btnShow, btnClear;! private boolean isShow = false;! private int imageNo;

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JPanel คือ ..............................................................................................................................

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ขั้นตอนท่ี 3 สรางคาเริ่มตน

! public void init() {! ! Container c = getContentPane();! ! c.setLayout(new FlowLayout());

! ! guiPanel = new JPanel();! ! guiPanel.setPreferredSize(new Dimension(500, 50));! ! guiPanel.setBorder( BorderFactory.createBevelBorder(0));

! ! btn1 = new JButton("Flower1");! ! btn1.addActionListener(this);! ! guiPanel.add(btn1);! ! btn2 = new JButton("Flower2");! ! btn2.addActionListener(this);! ! guiPanel.add(btn2);! ! btn3 = new JButton("Flower3");! ! btn3.addActionListener(this);! ! guiPanel.add(btn3);! ! btnShow = new JButton("Show");! ! btnShow.addActionListener(this);! ! guiPanel.add(btnShow);! ! btnClear = new JButton("Clear");! ! btnClear.addActionListener(this);! ! guiPanel.add(btnClear);

! ! graphicsPanel = new JPanel();! ! graphicsPanel.setPreferredSize(new Dimension(520, 260));! ! graphicsPanel.setBorder(BorderFactory.createBevelBorder(0));

! ! c.add(guiPanel);! ! c.add(graphicsPanel);

! ! loadImage();! }! public void loadImage()! {! ! image1 = new Picture( "/htb-8.png" );! ! image2 = new Picture( "/htb-16.png" );! ! image3 = new Picture( "/htb-35.png" );! }! public void paint( Graphics g )! {! ! super.paint( g );! ! if (isShow) {! ! ! switch( imageNo ) {! ! ! ! case 1:! ! ! ! ! image1.draw( graphicsPanel );! ! ! ! ! break;! ! ! ! case 2:! ! ! ! ! image2.draw( graphicsPanel );! ! ! ! ! break;! ! ! ! case 3:! ! ! ! ! image3.draw( graphicsPanel );! ! ! ! ! break;! ! ! }! ! }! }

ขั้นตอนท่ี 4 สรางในสวนของการตรวจสอบการกระทำกับปุมตางๆ

! public void actionPerformed(ActionEvent e) {! ! if (e.getSource() == btn1) imageNo = 1;! ! else if (e.getSource() == btn2) imageNo = 2;! ! else if (e.getSource() == btn3) imageNo = 3;! ! else if (e.getSource() == btnShow) {! ! ! if (isShow == true) { btnShow.setText("Not show"); }! ! ! else { btnShow.setText("Show"); }

! ! ! isShow = !isShow;! ! }! ! else {! ! ! imageNo = 0;! ! ! image1.clear( graphicsPanel );! ! }! ! repaint();! }

ขั้นตอนท่ี 5 ทดลอง Compile และ Run ผล

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การใชงาน ImageIcon และ JPanel แบบ Inheritance กับ Timer

ตัวอยางหนาจอการทำงาน (http://202.44.47.108/~ssc/image-jpanel/testAnimation.html)

Animation.javaimport java.awt.*;import java.awt.event.*;import javax.swing.*;import javax.swing.Timer;public class Animation extends JPanel implements ActionListener {! private int width = 400;! private int height = 400;! private Timer time;! private ImageIcon image[] = new ImageIcon[5];! private int imageNo = 0;! private Color color;

! public Animation() {! ! super();! ! setPreferredSize( new Dimension(width, height));! ! setBorder( BorderFactory.createBevelBorder(0));! ! time = new Timer(500, this);! ! loadImage();! ! color = getBackground();! }! public Animation(int w, int h) {! ! super();! ! width = w;! ! height = h;! ! setPreferredSize( new Dimension(width, height));! ! setBorder( BorderFactory.createBevelBorder(0));! ! time = new Timer(100, this);! ! loadImage();! ! color = getBackground();! }! private void loadImage() {! ! for(int n = 0; n < image.length ; n++) {! ! ! image[n] = new ImageIcon(getClass().getResource("/images/htb-"+n+".png"));! ! }! }! public void play() {! ! time.start();! }! public void stop() {! ! time.stop();! }! public void actionPerformed(ActionEvent e) {! ! nextImage();! ! Graphics g = getGraphics();! ! g.setColor(color);! ! g.fillRect( 1, 1, width, height);! ! image[imageNo].paintIcon( this, getGraphics(), 1, 1);! }! public void nextImage() {! ! imageNo++;! ! if (imageNo == 5) { imageNo = 0; }! }! protected void paintComponent(Graphics g) {! ! super.paintComponent(g);! }}

Method loadImage มีไวเพ่ือ ................................................................................................................................................

ที่ Method actionPerformed มีการทำงานอะไรบาง ................................................................................................................

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testAnimation.html<html>! <body> <h1>Test Animation</h1> <h3>Create by: 5366261111 Supaporn Simcharoen IT1-RC</h3>! ! <applet code="testAnimation.class" height="400" width="400">! ! </applet>! </body></html>

testAnimation.javaimport java.awt.*;import java.awt.event.*;import javax.swing.*;public class testAnimation extends JApplet implements ActionListener {! private Animation display;! private JButton playBtn, stopBtn;! public void init() {! ! Container c = getContentPane();! ! c.setLayout(new FlowLayout());! !! ! playBtn = new JButton("Play");! ! playBtn.addActionListener(this);! ! c.add(playBtn);! !! ! stopBtn = new JButton("Stop");! ! stopBtn.addActionListener(this);! ! c.add(stopBtn);! !! ! display = new Animation();! ! c.add(display);! }! public void paint(Graphics g) {! ! super.paint(g);! }! public void stop( ) {! ! display.stop();! }! public void actionPerformed(ActionEvent e) {! ! if (e.getSource() == playBtn) {! ! ! display.play();! ! ! playBtn.setEnabled(false);! ! }! ! else if (e.getSource() == stopBtn) {! ! ! display.stop();! ! ! playBtn.setEnabled(true);! ! }! }}

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Documents

Applet 7 image_j_panel