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Thread: Need help on print , scrollbar for my applet

  1. #1
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    Default Need help on print , scrollbar for my applet

    I have developed the applet code to embed in the jsf page for Image processing like zoom , rotate , print , back next ,. I have the problem with print, getting blank page printed, i think any security issues or code issues exists.
    and also i need any ones help in adding scrollbar , pagination if multiple image exists, as of now i am using back - next.

    Find the code below, please help me, as soon as possible.
    import javax.imageio.ImageIO;
     
    import javax.print.attribute.PrintRequestAttributeSet;
    import javax.swing.JApplet;
    import javax.swing.JButton;
    import javax.swing.JFrame;
    import javax.swing.JMenuItem;
    import javax.swing.JPanel;
    import javax.swing.JPopupMenu;
    import javax.swing.JScrollPane;
    import javax.swing.JTextPane;
    import javax.swing.JToolBar;
    import javax.swing.ScrollPaneConstants;
     
    import java.applet.Applet;
    import java.awt.*;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    import java.awt.event.MouseEvent;
    import java.awt.event.MouseListener;
    import java.awt.event.WindowAdapter;
    import java.awt.event.WindowEvent;
    import java.awt.PrintJob;
    import java.awt.image.BufferedImage;
    import java.awt.print.PageFormat;
    import java.awt.print.Printable;
    import java.awt.print.PrinterException;
    import java.awt.print.PrinterJob;
    import java.io.File;
    import java.io.IOException;
    import java.net.URL;
    import java.util.Properties;
     
    import javax.swing.*;
    import java.awt.*;
    import java.awt.event.*;
    import java.awt.print.PageFormat;
    import java.awt.print.Printable;
    import java.awt.print.PrinterException;
    import java.awt.print.PrinterJob;
    import java.net.*;
    import javax.print.*;
    import javax.print.attribute.*;
    import javax.print.attribute.standard.*;
    import javax.swing.*;
     
     
     
    import sun.awt.ScrollPaneWheelScroller;
     
    public class First extends JApplet{
     
    private static BufferedImage clouds[]=new BufferedImage[2];
    private JScrollPane scroll;
    private int flag = 0;
    private int scale = 1;
    private int newAngle = 0;
    private BufferedImage temp;
    private int zoomState=0;
    Scrollbar slider;
    int sliderValue;
    int number=0;
    // PrintImagePanel fImgPanel;
     
    public void init() {
    // File input = new File("D:\\Pooja\\flower030.gif");
    // File input1=new File("D:\\Pooja\\rose.jpg");
    try {
    URL url = new URL(getCodeBase(), "rose.jpg");
    BufferedImage img = ImageIO.read(url);
    clouds[0] = img;
     
    url = new URL(getCodeBase(), "rose.jpg");
    img = ImageIO.read(url);
    clouds[1] = img;
    // clouds[0] = ImageIO.read(input);
    // clouds[1]=ImageIO.read(input1);
     
     
    } catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
    }
    Demo demo = new Demo();
    getContentPane().add(demo);
    getContentPane().add("North", new DemoControls(demo));
     
     
     
    }
     
     
    public class Demo extends Canvas
    {
    public String direction = "image";
    public Object scalingFactor = "100%";
    public JScrollPane scrollPane;
    public Demo() {
     
    setBackground(Color.white);
     
    }
     
    public void drawDemo(int width, int height, Graphics g) {
    Graphics2D g2 = (Graphics2D) g;
     
    if (scalingFactor.equals("100%")) {
    scale = 1;
    } else if (scalingFactor.equals("200%")) {
    scale = 2;
    } else if (scalingFactor.equals("300%")) {
    scale = 3;
    }
    if (direction.equals("image")) {
    temp = Rotation(clouds[number], 0);
    newAngle = 0;
     
    } else if (direction.equals(">>>")) {
    temp = Rotation(clouds[number], newAngle - 90);
     
    newAngle = newAngle - 90;
    flag = 0;
    } else if (direction.equals("<<<")) {
     
    temp = Rotation(clouds[number], newAngle + 90);
     
    newAngle = newAngle + 90;
    flag = 1;
    } else if (direction.equals("zoom")) {
     
    if(scalingFactor.equals("50%")){
    temp = zoomOut(Rotation(clouds[number], newAngle),2);}
    else
    temp=zoomIn(Rotation(clouds[number], newAngle), scale);
    //spd = new ScrollPaneDemo(temp);
    }
    else if(direction.equals("zoomIn")){
    zoomState=zoomState+1;
    temp=resizeImage(zoomState);
    }
    else if(direction.equals("zoomOut")){
    zoomState=zoomState-1;
    temp=resizeImage(zoomState);
    }
    else if (direction.equals("back")){
    number=0;
    temp=Rotation(clouds[number], 0);
    }
    else if (direction.equals("next")){
     
    number=1;
    temp = Rotation(clouds[number], 0);
    }
     
    // temp = Rotation(clouds[number], 0);
    // newAngle = 0;
    // int frame_width = 360;
    // int frame_height = 360;
    //
    // /* PrintTestApp f = new PrintTestApp();
    // f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
    //
    // f.init (temp);
    // f.setSize (frame_width, frame_height);
    // f.setVisible (true);*/
    // PrintingApplet pa=new PrintingApplet();
    // } // main
    //
    //
     
     
    return;
    }
     
    public BufferedImage resizeImage(int zoomState){
    BufferedImage img=null;
    if(zoomState<0){
    img=zoomOut(Rotation(clouds[number], newAngle),(-1*zoomState)+1);
     
    }
    else if(zoomState>0){
    img=zoomIn(Rotation(clouds[number], newAngle),zoomState+1);
    }
    else if(zoomState==0){
    img=zoomIn(Rotation(clouds[number], newAngle),1);
    }
     
    switch(zoomState){
    case 3:img=zoomIn(Rotation(clouds[number], newAngle),4);System.out.println("3");break;
    case 2:img=zoomIn(Rotation(clouds[number], newAngle),3);System.out.println("2");break;
    case 1:img=zoomIn(Rotation(clouds[number], newAngle),2);System.out.println("1");break;
    case 0:img=zoomIn(Rotation(clouds[number], newAngle),1);System.out.println("0");break;
    case -1:img=zoomOut(Rotation(clouds[number], newAngle),2);System.out.println("-1");break;
    case -2:img=zoomOut(Rotation(clouds[number], newAngle),3);System.out.println("-2");break;
    case -3:img=zoomOut(Rotation(clouds[number], newAngle),4);System.out.println("-3");break;
    }
    return img;
    }
     
     
    // Function For ZoomIn
    public BufferedImage zoomIn(BufferedImage bi, int scale) {
    GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
    GraphicsDevice[] gs = ge.getScreenDevices();
    int screenWidth=0 ;
    int screenHeight=0;
    for (int i=0; i<gs.length; i++) {
    DisplayMode dm = gs[i].getDisplayMode();
    screenWidth = dm.getWidth();
    screenHeight = dm.getHeight();
    }
     
    int width = scale * bi.getWidth();
    int height = scale * bi.getHeight();
    BufferedImage biScale = new BufferedImage(width, height,
    bi.getType());
    for (int i = 0; i < width; i++)
    for (int j = 0; j < height; j++)
    biScale.setRGB(i, j, bi.getRGB(i / scale, j / scale));
    if((screenWidth<width)||(screenHeight<height)){
    System.out.println("Screen out Of Bound");
     
    }
    return biScale;
    }
     
    // Function For ZoomOut
    public BufferedImage zoomOut(BufferedImage bi,int d) {
    int width = (bi.getWidth() / d);
    int height = (bi.getHeight() / d);
    BufferedImage biScale = new BufferedImage(width, height,bi.getType());
    for (int i = 0; i < width; i++)
    for (int j = 0; j < height; j++)
    biScale.setRGB(i, j, bi.getRGB(i*d, j * d));
    return biScale;
    }
     
    // Method For Rotating Image
    public <Picture> BufferedImage Rotation(BufferedImage pic, double angl) {
    Picture pic1 = (Picture) pic;
    int width = pic.getWidth();
    int height = pic.getHeight();
    double angle = Math.toRadians(angl);
    double sin = Math.sin(angle);
    double cos = Math.cos(angle);
    double x0 = 0.5 * (width - 1); // point to rotate about
    double y0 = 0.5 * (height - 1); // center of image
    BufferedImage pic2 = new BufferedImage(width, height, 8);
    // rotation
    for (int x = 0; x < width; x++) {
    for (int y = 0; y < height; y++) {
    double a = x - x0;
    double b = y - y0;
    int xx = (int) (+a * cos - b * sin + x0);
    int yy = (int) (+a * sin + b * cos + y0);
     
    // plot pixel (x, y) the same color as (xx, yy) if it's in
    // bounds
    if (xx >= 0 && xx < width && yy >= 0 && yy < height) {
    pic2.setRGB(x, y, pic.getRGB(xx, yy));
    // pic2.set(x, y, pic1.get(xx, yy));
    }
    }
    }
    return pic2;
    }
     
    //For Printing
     
     
    public void paint(Graphics g) {
     
    {Graphics2D g2 = (Graphics2D) g;
    Dimension d = getSize();
    g.clearRect(0, 0, d.width, d.height);
    drawDemo(d.width, d.height, g);
    g2.drawImage(temp, 100, 20, this);}
     
     
     
    }
     
    }
     
    static class DemoControls extends JPanel implements ActionListener,Printable,ItemListener
    {
    Demo demo;
    JToolBar toolbar;
    private JComboBox combo;
    protected JTextArea textArea;
     
    public DemoControls(Demo demo) {
    this.demo = demo;
    demo.setBackground(Color.white);
    add(toolbar = new JToolBar(), BorderLayout.PAGE_START);
    toolbar.setFloatable(true);
    addTool("image", "true Image", true);
    addTool("<<<", "anticlockwise", false);
    addTool(">>>", "clockwise", false);
    addTool("zoom", "zoom", false);
    addTool("zoomIn","zoomIn",false);
    addTool("zoomOut","zoomOut",false);
    addTool("back","last image",false);
    addTool("next","next image",false);
    addTool("print","Printing",false);
     
     
    add(combo = new JComboBox());
    combo.addItem("50%");
    combo.addItem("100%");
    combo.addItem("200%");
    combo.addItem("300%");
    combo.addItemListener(this);
    }
     
    public void addTool(String str, String tooltip, boolean state) {
    JButton b = (JButton) toolbar.add(new JButton(str));
    b.setBackground(state ? Color.pink : Color.lightGray);
    b.setToolTipText(tooltip);
    b.setSelected(state);
    b.addActionListener(this);
    }
     
    public void itemStateChanged(ItemEvent event) {
    if (event.getSource() == combo
    && event.getStateChange() == ItemEvent.SELECTED) {
    System.out.println("Change:" + combo.getSelectedItem());
    //System.out.println("Inside Item Listener");
    demo.scalingFactor = combo.getSelectedItem();
    }
    }
     
    public void actionPerformed(ActionEvent e) {
     
    for (int i = 0; i < toolbar.getComponentCount(); i++) {
    //System.out.println("Inside Action Listener");
    JButton b = (JButton) toolbar.getComponentAtIndex(i);
    b.setBackground(Color.lightGray);
     
    }
    JButton b = (JButton) e.getSource();
    b.setBackground(Color.GRAY);
    demo.direction = b.getText();
    if(b.getText().equalsIgnoreCase("print")){
    PrinterJob printJob = PrinterJob.getPrinterJob();
    printJob.setPrintable(this);
    if (printJob.printDialog())
    {
    try
    {
    printJob.print();
    }
    catch (Exception ex)
    {
    ex.printStackTrace();
    }
    }
     
    }
    demo.repaint();
    }
     
    public int print(Graphics g, PageFormat arg1, int arg2)
    throws PrinterException {
    // TODO Auto-generated method stub
    Graphics pg = getGraphics();
    paint(pg);
    demo.repaint();
    return 0;
    }
    }
     
    public static void main(String[] args) {
    First demo = new First();
    demo.init();
    JFrame f = new JFrame("ToolBar");
    f.addWindowListener(new WindowAdapter() {
    public void windowClosing(WindowEvent e) {
    System.exit(0);
    }
    });
     
    f.pack();
    f.setSize(new Dimension(200, 200));
    f.show();
     
     
     
    }
     
     
    }
    Last edited by KevinWorkman; May 12th, 2011 at 09:58 AM. Reason: added highlight tags


  2. #2
    Administrator copeg's Avatar
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    Default Re: Need help on print , scrollbar for my applet

    Thanks to KevinWorkman for adding the code tags...in the future please flank your code with them

    For printing, see What Applets Can and Cannot Do (The Java™ Tutorials > Deployment > Applets) (in other words, sign the applet).

  3. #3
    Crazy Cat Lady KevinWorkman's Avatar
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    Default Re: Need help on print , scrollbar for my applet

    Quote Originally Posted by Anandprasad View Post
    Find the code below, please help me, as soon as possible.
    That is WAY too much code for anybody to wade through. We have hundreds of posts here- we simply do not have time to do your debugging for you. Boil your problem down to an SSCCE (the first 'S' stands for "SHORT"), ask a specific question, and we'll go from there.

    By the way, saying things like "please help me as soon as possible" is considered rude, and will actually decrease your chances of getting help. Do you value your time that much more than the time of the other posters and contributors here?

    Also, please use the highlight tags when posting code. I added them for you this time.
    Useful links: How to Ask Questions the Smart Way | Use Code Tags | Java Tutorials
    Static Void Games - Play indie games, learn from game tutorials and source code, upload your own games!

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