Fit the image to window width, window height and the window size

Question

hi all
here we wrote the code for "fit the image to window width, window height and the window size". we are facing some problems in it. and all these operations have to perform even after zooming operations are done.if the below code doesnt satisfy kindly provide appropriate code .
thanks .
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.awt.image.BufferedImage;
import java.io.*;
import javax.imageio.ImageIO;
import javax.swing.*;
import java.io.File;
import javax.swing.filechooser.FileFilter;
import java.awt.geom.*;
public class DP extends JFrame implements ActionListener,
                                           MouseListener,
                                           MouseMotionListener {
    private final int PEN_OP = 1;
    private final int CLEAR_OP = 2;
    private int radius;
    private int radius1;
    private int mousex = 0;
    private int mousey = 0;
    private int prevx = 0;
    private int prevy = 0;
    private boolean initialFreeHand = true;
    private boolean initialLine = true;
    private boolean initialEraser = true;
    private int Orx = 0;
    private int Ory = 0;
    private int OrWidth = 0;
    private int OrHeight = 0;
    private int drawX = 0;
    private int drawY = 0;
    private int polyX = 0;
    private int polyY = 0;
    private int eraserLength = 5;
    private int udefRedValue = 255;
    private int udefGreenValue = 255;
    private int udefBlueValue = 255;
    private int opStatus = PEN_OP;
    private int colorStatus = 1;
    private double zoomPercentage=10;
    private Color mainColor = new Color(0, 0, 0);
    private Color xorColor = new Color(255, 255, 255);
    private Color userDefinedColor =
        new Color(udefRedValue, udefGreenValue,udefBlueValue);
    private JButton openButton = new JButton("open");
    private JButton closeButton = new JButton("close");
     private JButton zoominButton = new JButton("ZoomIn");
     private JButton zoomoutButton = new JButton("ZoomOut");
     private JButton zoomto100Button = new JButton("ZoomTo100");
     private JButton fwwButton = new JButton("Fit window width");
     private JButton fwhButton = new JButton("Fit window height");
     private JButton fwButton = new JButton("Fit the window");
    private JButton clearButton = new JButton("Clear");
    private JTextField colorStatusBar = new JTextField(20);
    private JTextField opStatusBar = new JTextField(20);
    private JTextField mouseStatusBar = new JTextField(10);
    private JPanel controlPanel = new JPanel(new GridLayout(18, 1, 0, 0));
    JToolBar jToolbar = new JToolBar();
    private Container container;
    private JScrollBar horizantalSlide=new JScrollBar();
    public BufferedImage image;
    BufferedImage bgImage;
//    public ImageIcon icon=null;
    JFileChooser fileChooser;
    DrawPanel drawPanel = new DrawPanel(bgImage,zoomPercentage);
    public DP() {
        super("WhiteBoard");
        fileChooser = new JFileChooser(".");
        container = getContentPane();
        container.setBackground(Color.white);
        container.setLayout(new BorderLayout());
        container.add(jToolbar,BorderLayout.NORTH);
        container.add(horizantalSlide);
        jToolbar.add(openButton);
        jToolbar.add(closeButton);
          jToolbar.add(zoominButton);
          jToolbar.add(zoomoutButton);
          jToolbar.add(zoomto100Button);
          jToolbar.add(fwwButton);
          jToolbar.add(fwhButton);
          jToolbar.add(fwButton);
        jToolbar.add(clearButton);
        colorStatusBar.setEditable(false);
        opStatusBar.setEditable(false);
        mouseStatusBar.setEditable(false);
        controlPanel.setBackground(Color.white);
        drawPanel.setBackground(Color.white);
        container.add(controlPanel, "West");
        container.add(drawPanel, "Center");
        openButton.addActionListener(this);
        closeButton.addActionListener(this);
          zoominButton.addActionListener(this);
          zoomoutButton.addActionListener(this);
          zoomto100Button.addActionListener(this);
          fwwButton.addActionListener(this);
          fwhButton.addActionListener(this);
          fwButton.addActionListener(this);
        clearButton.addActionListener(this);
        drawPanel.addMouseMotionListener(this);
        drawPanel.addMouseListener(this);
        addMouseListener(this);
        addMouseMotionListener(this);
        opStatusBar.setText("FreeHand");
        colorStatusBar.setText("Black");
    public void actionPerformed(ActionEvent e) {
        if(e.getActionCommand().equals("open"))
            showDialog();
        if(e.getActionCommand().equals("close"))
            closeDialog();
          if(e.getActionCommand().equals("ZoomIn"))
               drawPanel.zoom(1);
          if(e.getActionCommand().equals("ZoomOut"))
               drawPanel.zoom(-1);
          if(e.getActionCommand().equals("ZoomTo100"))
               drawPanel.zoom(+10);
          if(e.getActionCommand().equals("Fit window width"))
               drawPanel.fitwindowwidth();
          if(e.getActionCommand().equals("Fit window height"))
               drawPanel.fitwindowheight();
          if(e.getActionCommand().equals("Fit the window"))
               drawPanel.fitthewindow();
        if (e.getActionCommand() == "Clear")
            opStatus = CLEAR_OP;
        switch (opStatus) {
            case CLEAR_OP:
                clearPanel();
    private void showDialog() {
        if(fileChooser.showOpenDialog(this) == JFileChooser.APPROVE_OPTION) {
            File file = fileChooser.getSelectedFile();
            try {
                bgImage = ImageIO.read(file);
            } catch(IOException e) {
                System.out.println("IO error: " + e.getMessage());
            clearPanel();
    private void closeDialog() {
        drawPanel.setVisible(false);
        drawPanel.repaint();
    public void clearPanel() {
        opStatusBar.setText("Clear");
        Graphics g = image.getGraphics();
        g.setColor(drawPanel.getBackground());
        g.fillRect(0, 0, drawPanel.getBounds().width, drawPanel.getBounds().height);
        if(bgImage != null)
            g.drawImage(bgImage, 0, 0, this);
        g.dispose();
        drawPanel.repaint();
    public boolean mouseHasMoved(MouseEvent e) {
        return (mousex != e.getX() || mousey != e.getY());
    public void setActualBoundry() {
        if (mousex < Orx || mousey < Ory) {
            if (mousex < Orx) {
                OrWidth = Orx - mousex;
                drawX = Orx - OrWidth;
            } else {
                drawX = Orx;
                OrWidth = mousex - Orx;
            if (mousey < Ory) {
                OrHeight = Ory - mousey;
                drawY = Ory - OrHeight;
            } else {
                drawY = Ory;
                OrHeight = mousey - Ory;
        } else {
            drawX = Orx;
            drawY = Ory;
            OrWidth = mousex - Orx;
            OrHeight = mousey - Ory;
    public void setGraphicalDefaults(MouseEvent e) {
        mousex = e.getX();
        mousey = e.getY();
        prevx = e.getX();
        prevy = e.getY();
        Orx = e.getX();
        Ory = e.getY();
        drawX = e.getX();
        drawY = e.getY();
        OrWidth = 0;
        OrHeight = 0;
    public void mouseDragged(MouseEvent e) {
        updateMouseCoordinates(e);
        switch (opStatus) {}
    public void mouseReleased(MouseEvent e) {
        updateMouseCoordinates(e);
        switch (opStatus) {}
    public void mouseEntered(MouseEvent e) {
        updateMouseCoordinates(e);
    public void updateMouseCoordinates(MouseEvent e) {
        String xCoor = "";
        String yCoor = "";
        if (e.getX() < 0)
            xCoor = "0";
        else {
            xCoor = String.valueOf(e.getX());
        if (e.getY() < 0)
            xCoor = "0";
        else {
            yCoor = String.valueOf(e.getY());
        mouseStatusBar.setText("x:" + xCoor + " y:" + yCoor);
    public void mouseClicked(MouseEvent e) { updateMouseCoordinates(e); }
    public void mouseExited(MouseEvent e) { updateMouseCoordinates(e); }
    public void mouseMoved(MouseEvent e) { updateMouseCoordinates(e); }
    public void mousePressed(MouseEvent e) { updateMouseCoordinates(e); }
    public static void main(String[] args) {
        DP wb = new DP();
        wb.setDefaultCloseOperation(EXIT_ON_CLOSE);
        wb.setSize(1024,740);
        wb.setVisible(true);
    private class DrawPanel extends JPanel {
        private double m_zoom = 1.0;
        private double m_zoomPercentage;
        private BufferedImage m_image;
        double theta = 0;
        double thetaInc = Math.PI/2;
        public DrawPanel(BufferedImage imageb,double zoomPercentage) {
            m_image = imageb;
            m_zoomPercentage = zoomPercentage / 100;
        protected void paintComponent(Graphics g) {
            Graphics2D g2d=(Graphics2D)g;
            if(image == null)
                initImage();
            g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
                                 RenderingHints.VALUE_INTERPOLATION_BICUBIC);
            double x = (1.0 - m_zoom)*getWidth()/2.0;
            double y = (1.0 - m_zoom)*getHeight()/2.0;
            AffineTransform at = AffineTransform.getTranslateInstance(x, y);
            at.rotate(theta,m_zoom*getWidth()/2,m_zoom*getHeight()/2);
            at.scale(m_zoom, m_zoom);
            g2d.drawRenderedImage(image, at);
  public void zoom(int inc) {
        m_zoom += inc * m_zoomPercentage;
        repaint();
          public void fitwindowwidth()
            int w1=drawPanel.getWidth();
            int h1=drawPanel.getHeight();
            BufferedImage image2=image.getScaledInstance(w1,h1,Image.SCALE_DEFAULT);
            drawPanel.setPreferredSize(new java.awt.Dimension(100,image2.getImage().getHeight(null)));
           drawPanel.repaint();
          public void fitwindowheight()
       BufferedImage image2=image.getScaledInstance(500,680,1); 
       drawPanel.setImage(iicon);
       drawPanel.setPreferredSize(new java.awt.Dimension(100,image2.getImage().getHeight(null)));
       drawPanel.repaint();
          public void fitthewindow()
       BufferedImage image2=image.getScaledInstance(1000,680,1);
       drawPanel.setPreferredSize(new java.awt.Dimension(100,image2.getImage().getHeight(null)));
       drawPanel.repaint();
        private void initImage() {
            int w = getWidth();
            int h = getHeight();
            image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
            Graphics2D g2 = image.createGraphics();
            g2.setPaint(getBackground());
            g2.fillRect(0,0,w,h);
            g2.dispose();
}

Answer 1

thank you for giving reply.
your code is very helpful to us.but i couldn't integrate it in my code.here's my code.
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.awt.image.BufferedImage;
import java.io.*;
import javax.imageio.ImageIO;
import javax.swing.*;
import java.io.File;
import javax.swing.filechooser.FileFilter;
import java.awt.geom.*;
public class IS extends JFrame implements ActionListener,
                                           MouseListener,
                                           MouseMotionListener {
    private final int PEN_OP = 1;
    private final int CLEAR_OP = 2;
     private     final int DISTORT = 3;
    private final int SCALE   = 4;
    private final int FIT     = 5;
    private final int FILL    = 6;
    int scaleMode = SCALE;
    private int radius;
    private int radius1;
    private int mousex = 0;
    private int mousey = 0;
    private int prevx = 0;
    private int prevy = 0;
    private boolean initialFreeHand = true;
    private boolean initialLine = true;
    private boolean initialEraser = true;
    private int Orx = 0;
    private int Ory = 0;
    private int OrWidth = 0;
    private int OrHeight = 0;
    private int drawX = 0;
    private int drawY = 0;
    private int polyX = 0;
    private int polyY = 0;
    private int eraserLength = 5;
    private int udefRedValue = 255;
    private int udefGreenValue = 255;
    private int udefBlueValue = 255;
    private int opStatus = PEN_OP;
    private int colorStatus = 1;
    private double zoomPercentage=10;
    private Color mainColor = new Color(0, 0, 0);
    private Color xorColor = new Color(255, 255, 255);
    private Color userDefinedColor =
        new Color(udefRedValue, udefGreenValue,udefBlueValue);
    private JButton openButton = new JButton("open");
    private JButton closeButton = new JButton("close");
     private JButton zoominButton = new JButton("ZoomIn");
     private JButton zoomoutButton = new JButton("ZoomOut");
     private JButton zoomto100Button = new JButton("ZoomTo100");
     private JButton fwwButton = new JButton("Fit window width");
     private JButton fwhButton = new JButton("Fit window height");
     private JButton fwButton = new JButton("Fit the window");
    private JButton clearButton = new JButton("Clear");
    private JTextField colorStatusBar = new JTextField(20);
    private JTextField opStatusBar = new JTextField(20);
    private JTextField mouseStatusBar = new JTextField(10);
    private JPanel controlPanel = new JPanel(new GridLayout(18, 1, 0, 0));
    JToolBar jToolbar = new JToolBar();
    private Container container;
    private JScrollBar horizantalSlide=new JScrollBar();
    public BufferedImage image;
    BufferedImage bgImage;
//    public ImageIcon icon=null;
    JFileChooser fileChooser;
    DrawPanel drawPanel = new DrawPanel(bgImage,zoomPercentage);
    public IS() {
        super("WhiteBoard");
        fileChooser = new JFileChooser(".");
        container = getContentPane();
        container.setBackground(Color.white);
        container.setLayout(new BorderLayout());
        container.add(jToolbar,BorderLayout.NORTH);
        container.add(horizantalSlide);
        jToolbar.add(openButton);
        jToolbar.add(closeButton);
          jToolbar.add(zoominButton);
          jToolbar.add(zoomoutButton);
          jToolbar.add(zoomto100Button);
          jToolbar.add(fwwButton);
          jToolbar.add(fwhButton);
          jToolbar.add(fwButton);
        jToolbar.add(clearButton);
        colorStatusBar.setEditable(false);
        opStatusBar.setEditable(false);
        mouseStatusBar.setEditable(false);
        controlPanel.setBackground(Color.white);
        drawPanel.setBackground(Color.white);
        container.add(controlPanel, "West");
        container.add(drawPanel, "Center");
        openButton.addActionListener(this);
        closeButton.addActionListener(this);
          zoominButton.addActionListener(this);
          zoomoutButton.addActionListener(this);
          zoomto100Button.addActionListener(this);
          fwwButton.addActionListener(this);
          fwhButton.addActionListener(this);
          fwButton.addActionListener(this);
        clearButton.addActionListener(this);
        drawPanel.addMouseMotionListener(this);
        drawPanel.addMouseListener(this);
        addMouseListener(this);
        addMouseMotionListener(this);
        opStatusBar.setText("FreeHand");
        colorStatusBar.setText("Black");
    public void actionPerformed(ActionEvent e) {
        if(e.getActionCommand().equals("open"))
            showDialog();
        if(e.getActionCommand().equals("close"))
            closeDialog();
          if(e.getActionCommand().equals("ZoomIn"))
               drawPanel.zoom(1);
          if(e.getActionCommand().equals("ZoomOut"))
               drawPanel.zoom(-1);
          if(e.getActionCommand().equals("ZoomTo100"))
               drawPanel.zoom(+10);
          if(e.getActionCommand().equals("Fit window width"))
               //drawPanel.fitwindowwidth();
          drawPanel.scaleImage(0,0,0,0);
          if(e.getActionCommand().equals("Fit window height"))
          drawPanel.scaleImage(0,0,0,0);
          if(e.getActionCommand().equals("Fit the window"))
          drawPanel.scaleImage(0,0,0,0);
        if (e.getActionCommand() == "Clear")
            opStatus = CLEAR_OP;
        switch (opStatus) {
            case CLEAR_OP:
                clearPanel();
    private void showDialog() {
        if(fileChooser.showOpenDialog(this) == JFileChooser.APPROVE_OPTION) {
            File file = fileChooser.getSelectedFile();
            try {
                bgImage = ImageIO.read(file);
            } catch(IOException e) {
                System.out.println("IO error: " + e.getMessage());
            clearPanel();
    private void closeDialog() {
        drawPanel.setVisible(false);
        drawPanel.repaint();
    public void clearPanel() {
        opStatusBar.setText("Clear");
          int w = image.getWidth();
        int h = image.getHeight();
        Graphics g = image.getGraphics();
        g.setColor(drawPanel.getBackground());
        g.fillRect(0, 0, w, h);
        if(bgImage != null) {
            int x = (w - bgImage.getWidth())/2;
            int y = (h - bgImage.getHeight())/2;
            g.drawImage(bgImage, x, y, this);
        g.dispose();
        drawPanel.repaint();
    public boolean mouseHasMoved(MouseEvent e) {
        return (mousex != e.getX() || mousey != e.getY());
    public void setActualBoundry() {
        if (mousex < Orx || mousey < Ory) {
            if (mousex < Orx) {
                OrWidth = Orx - mousex;
                drawX = Orx - OrWidth;
            } else {
                drawX = Orx;
                OrWidth = mousex - Orx;
            if (mousey < Ory) {
                OrHeight = Ory - mousey;
                drawY = Ory - OrHeight;
            } else {
                drawY = Ory;
                OrHeight = mousey - Ory;
        } else {
            drawX = Orx;
            drawY = Ory;
            OrWidth = mousex - Orx;
            OrHeight = mousey - Ory;
    public void setGraphicalDefaults(MouseEvent e) {
        mousex = e.getX();
        mousey = e.getY();
        prevx = e.getX();
        prevy = e.getY();
        Orx = e.getX();
        Ory = e.getY();
        drawX = e.getX();
        drawY = e.getY();
        OrWidth = 0;
        OrHeight = 0;
    public void mouseDragged(MouseEvent e) {
        updateMouseCoordinates(e);
        switch (opStatus) {
    public void mouseReleased(MouseEvent e) {
        updateMouseCoordinates(e);
        switch (opStatus) {}
    public void mouseEntered(MouseEvent e) {
        updateMouseCoordinates(e);
    public void updateMouseCoordinates(MouseEvent e) {
        String xCoor = "";
        String yCoor = "";
        if (e.getX() < 0)
            xCoor = "0";
        else {
            xCoor = String.valueOf(e.getX());
        if (e.getY() < 0)
            xCoor = "0";
        else {
            yCoor = String.valueOf(e.getY());
        mouseStatusBar.setText("x:" + xCoor + " y:" + yCoor);
    public void mouseClicked(MouseEvent e) { updateMouseCoordinates(e); }
    public void mouseExited(MouseEvent e) { updateMouseCoordinates(e); }
    public void mouseMoved(MouseEvent e) { updateMouseCoordinates(e); }
    public void mousePressed(MouseEvent e) { updateMouseCoordinates(e); }
    public static void main(String[] args) {
        IS wb = new IS();
        wb.setDefaultCloseOperation(EXIT_ON_CLOSE);
        wb.setSize(1024,740);
        wb.setVisible(true);
    private class DrawPanel extends JPanel {
        private double m_zoom = 1.0;
        private double m_zoomPercentage;
        private BufferedImage m_image;
        double theta = 0;
        double thetaInc = Math.PI/2;
        public DrawPanel(BufferedImage imageb,double zoomPercentage) {
            m_image = imageb;
            m_zoomPercentage = zoomPercentage / 100;
        protected void paintComponent(Graphics g) {
               super.paintComponent(g);
            Graphics2D g2d=(Graphics2D)g;
            if(image == null)
                initImage();
            g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
                                 RenderingHints.VALUE_INTERPOLATION_BICUBIC);
                          int w = getWidth();
                int h = getHeight();
              int iw = image.getWidth();
              int ih = image.getHeight();
              if(scaleMode == SCALE) {
            double x = (w - m_zoom*iw)/2;
            double y = (h - m_zoom*ih)/2;
            AffineTransform at = AffineTransform.getTranslateInstance(x, y);
            at.rotate(theta,m_zoom*getWidth()/2,m_zoom*getHeight()/2);
            at.scale(m_zoom, m_zoom);
            g2d.drawRenderedImage(image, at);
               else {
            scaleImage(w, h, iw, ih);
          private void scaleImage( int w, int h, int iw, int ih) {
                         Graphics2D g2d = image.createGraphics();
        double xScale = (double)w/iw;
        double yScale = (double)h/ih;
        AffineTransform at = new AffineTransform();
        if(scaleMode == DISTORT) {
            double x = (w - xScale*iw)/2;
            double y = (h - yScale*ih)/2;
            at.setToTranslation(x, y);
            at.scale(xScale, yScale);
        } else {
            double scale = (scaleMode == FIT) ? Math.min(xScale, yScale)
                                              : Math.max(xScale, yScale);
            double x = (w - scale*iw)/2;
            double y = (h - scale*ih)/2;
            at.setToTranslation(x, y);
            at.scale(scale, scale);
        g2d.drawRenderedImage(image, at);
  public void zoom(int inc) {
        m_zoom += inc * m_zoomPercentage;
        repaint();
        private void initImage() {
            int w = getWidth();
            int h = getHeight();
            image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
            Graphics2D g2 = image.createGraphics();
            g2.setPaint(getBackground());
            g2.fillRect(0,0,w,h);
            g2.dispose();
}