CaptchaPanel.java

package kubach.gui;

import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.event.KeyEvent;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JOptionPane;
import kubach.packet.PacketCaptchaImage;
import kubach.workers.LoadCaptchaWorker;
import kubach.workers.RegisterUserWorker;

/**
 *
 * @author Cr0s
 */
public class CaptchaPanel extends javax.swing.JDialog {

    private BufferedImage img;
    private String key;
    public String username, password;
    public MainFrame mf;

    /**
     * Creates new form CaptchaPanel
     */
    public CaptchaPanel(MainFrame mf) {
        this.mf = mf;

        initComponents();
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {

        panImg = new javax.swing.JPanel();
        lblImg = new javax.swing.JLabel();
        txtAns = new javax.swing.JTextField();

        setAlwaysOnTop(true);
        setMaximumSize(new java.awt.Dimension(280, 166));
        setMinimumSize(new java.awt.Dimension(280, 166));
        setResizable(false);
        addWindowListener(new java.awt.event.WindowAdapter() {
            public void windowClosed(java.awt.event.WindowEvent evt) {
                formWindowClosed(evt);
            }
            public void windowOpened(java.awt.event.WindowEvent evt) {
                formWindowOpened(evt);
            }
        });

        panImg.setBorder(javax.swing.BorderFactory.createEtchedBorder());

        lblImg.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                lblImgMouseClicked(evt);
            }
        });

        javax.swing.GroupLayout panImgLayout = new javax.swing.GroupLayout(panImg);
        panImg.setLayout(panImgLayout);
        panImgLayout.setHorizontalGroup(
            panImgLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(lblImg, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        );
        panImgLayout.setVerticalGroup(
            panImgLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(lblImg, javax.swing.GroupLayout.DEFAULT_SIZE, 64, Short.MAX_VALUE)
        );

        txtAns.addKeyListener(new java.awt.event.KeyAdapter() {
            public void keyPressed(java.awt.event.KeyEvent evt) {
                txtAnsKeyPressed(evt);
            }
            public void keyTyped(java.awt.event.KeyEvent evt) {
                txtAnsKeyTyped(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                    .addComponent(panImg, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(txtAns, javax.swing.GroupLayout.DEFAULT_SIZE, 260, Short.MAX_VALUE))
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(panImg, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(txtAns, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
    }// </editor-fold>//GEN-END:initComponents

    private void txtAnsKeyTyped(java.awt.event.KeyEvent evt) {//GEN-FIRST:event_txtAnsKeyTyped
    }//GEN-LAST:event_txtAnsKeyTyped

    private void formWindowOpened(java.awt.event.WindowEvent evt) {//GEN-FIRST:event_formWindowOpened
        evt.getWindow().setLocationRelativeTo(evt.getOppositeWindow());

        this.setTitle("Enter captcha");

        this.setSize(new Dimension(280, 146));
    }//GEN-LAST:event_formWindowOpened

    private void txtAnsKeyPressed(java.awt.event.KeyEvent evt) {//GEN-FIRST:event_txtAnsKeyPressed
        if (evt.getKeyCode() == KeyEvent.VK_ENTER) {
            RegisterUserWorker ruw = new RegisterUserWorker(this, this.username, this.password, this.key, txtAns.getText());
            ruw.execute();

            this.setVisible(false);
            img.getGraphics().dispose();
        } else if (evt.getKeyCode() == KeyEvent.VK_ESCAPE) {
            this.setVisible(false);

            img.getGraphics().dispose();
            
            mf.cancelRegistration();
        }
    }//GEN-LAST:event_txtAnsKeyPressed

    private void formWindowClosed(java.awt.event.WindowEvent evt) {//GEN-FIRST:event_formWindowClosed
        img.getGraphics().dispose();
        this.mf.cancelRegistration();
    }//GEN-LAST:event_formWindowClosed

    private void lblImgMouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_lblImgMouseClicked
        // refresh captcha
        LoadCaptchaWorker lcw = new LoadCaptchaWorker(this, this.username, this.password);
        lcw.execute();
    }//GEN-LAST:event_lblImgMouseClicked
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JLabel lblImg;
    private javax.swing.JPanel panImg;
    private javax.swing.JTextField txtAns;
    // End of variables declaration//GEN-END:variables

    public void loadCaptchaImage(PacketCaptchaImage p) {
        if (!p.hasCaptcha) {
            JOptionPane.showMessageDialog(this, p.key, "Error", JOptionPane.ERROR_MESSAGE, null);

            this.setVisible(false);

            mf.cancelRegistration();

            return;
        }

        try {
            img = ImageIO.read(new ByteArrayInputStream(p.imageData));
        } catch (IOException ex) {
            Logger.getLogger(CaptchaPanel.class.getName()).log(Level.SEVERE, null, ex);
        }
        this.key = p.key;

        txtAns.setText("");
        this.setVisible(true);

        drawCaptchaImage();
    }

    private void drawCaptchaImage() {
        if (img != null) {
            //img = resize(img, 256, 64);

            lblImg.setIcon(new ImageIcon(img));
            lblImg.repaint();
        }
    }

    public static BufferedImage resize(BufferedImage image, int width, int height) {
        BufferedImage bi = new BufferedImage(width, height, BufferedImage.TRANSLUCENT);
        Graphics2D g2d = (Graphics2D) bi.createGraphics();
        g2d.addRenderingHints(new RenderingHints(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY));
        g2d.drawImage(image, 0, 0, width, height, null);
        g2d.dispose();
        return bi;
    }
}