/*
 * WebPane.java
 *
 * Created on den 29 augusti 2001, 19:56
 */

package ip1.u2;

import javax.swing.JTextArea;
import java.awt.event.*;
import java.net.URL;
import java.net.MalformedURLException;
import java.io.*;

public class WebPane extends javax.swing.JPanel implements ActionListener{
    private javax.swing.JPanel jPanel2;
    private javax.swing.JTextField jTextField1;
    private javax.swing.JButton jButton1;
    private javax.swing.JScrollPane jScrollPane1;
    protected javax.swing.text.JTextComponent content; //innehållskomponenten
    private String urlString;
    
    // konstruktorn
    public WebPane() {
        initWebPane();   //initierar komponenten
        setUrlString("http://www.dsv.su.se"); //sätter initial webadress
    }
    
    // bestämmer i vilken typ av textkomponent innehållet skall visas
    protected void initTeatArea() {
        content = new javax.swing.JTextArea();
        content.setEditable(false);
    }
    
    /* 1: kopplar upp sig mot url
     * 2: hämtar innehållet
     * 3: visar innehållet i innehållskomponenten
     */
    protected void addContent(String urlString) {
        try {
            URL url = new URL(urlString);
            BufferedReader br = new BufferedReader(new InputStreamReader(url.openStream()));
            String line = "";
            content.setText(line);
            while((line = br.readLine()) != null)
                ((JTextArea) content).append(line + '\n');
        } catch (IOException e) {
            content.setText(e.toString());
        }
    }
    
    // aktiveras om användaren trycker retur i adressfältet eller trycker på "fetch the web"-knappen
    public void actionPerformed(ActionEvent e) {
        addContent(jTextField1.getText());
    }
    
    // Skapar användargränssnittet
    private void initWebPane() {
        jPanel2 = new javax.swing.JPanel();
        jTextField1 = new javax.swing.JTextField();
        jTextField1.addActionListener(this);
        jButton1 = new javax.swing.JButton();
        jButton1.addActionListener(this);
        jScrollPane1 = new javax.swing.JScrollPane();
        initTeatArea(); // initierar innehållskomponenten
                
        setLayout(new java.awt.GridBagLayout());
        java.awt.GridBagConstraints gridBagConstraints1;
        
        jPanel2.setLayout(new java.awt.GridBagLayout());
        java.awt.GridBagConstraints gridBagConstraints2;
        
        gridBagConstraints2 = new java.awt.GridBagConstraints();
        gridBagConstraints2.fill = java.awt.GridBagConstraints.HORIZONTAL;
        gridBagConstraints2.weightx = 1.0;
        jPanel2.add(jTextField1, gridBagConstraints2);
        
        jButton1.setText("Go, fetch the web");
        gridBagConstraints2 = new java.awt.GridBagConstraints();
        jPanel2.add(jButton1, gridBagConstraints2);
        
        gridBagConstraints1 = new java.awt.GridBagConstraints();
        gridBagConstraints1.fill = java.awt.GridBagConstraints.HORIZONTAL;
        gridBagConstraints1.anchor = java.awt.GridBagConstraints.NORTH;
        add(jPanel2, gridBagConstraints1);
        
        jScrollPane1.setViewportView(content);
        
        gridBagConstraints1 = new java.awt.GridBagConstraints();
        gridBagConstraints1.gridx = 0;
        gridBagConstraints1.gridy = 1;
        gridBagConstraints1.fill = java.awt.GridBagConstraints.BOTH;
        gridBagConstraints1.weightx = 1.0;
        gridBagConstraints1.weighty = 1.0;
        add(jScrollPane1, gridBagConstraints1);
    }
    
    /** Getter for property urlString.
     * @return Value of property urlString.
     */
    public String getUrlString() {
        return urlString;
    }
    
    /** Setter for property urlString.
     * @param urlString New value of property urlString.
     */
    public void setUrlString(String urlString) {
        this.urlString = urlString;
        jTextField1.setText(urlString);
    }
    
}