JScrollPane issues.

[DarrylBurke]

Moving to AWT/Swing

db

[Norm]

By removing the IDE generated code, the scrollpane works:

import javax.swing.*;
import javax.swing.GroupLayout.Alignment;
 
import javax.swing.LayoutStyle.ComponentPlacement;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.Dimension;
import java.awt.ScrollPane;
import java.awt.BorderLayout;
import javax.swing.border.MatteBorder;
import java.awt.Color;
 
 
public class MainWindow {
     
    /**
     * Provides the swing code for the Encryption App for 128 bit encryption.
     * 
     * @author Chris
     * @version Version 1
     * 
     */
     
//    private AESImplementation cryptoTool;
     
    public MainWindow() {
        JFrame appFrame = new JFrame("Chris - AES 128");
        appFrame.setResizable(false);
        appFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        appFrame.setSize(270,311);
        // Create the window.
        JPanel appPanel = new JPanel();
        appPanel.setSize(200,200);
        // Create the panel for the components.
        appFrame.getContentPane().add(appPanel, BorderLayout.CENTER);
        // Associate the panel with the window.
         
         
        final JTextArea txtrPlaintext = new JTextArea();
        JScrollPane scrPane = new JScrollPane(txtrPlaintext);
        scrPane.setToolTipText("Scroll bar");
        scrPane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
        scrPane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
        appPanel.add(scrPane);

        txtrPlaintext.setMaximumSize(new Dimension(10,10));
        txtrPlaintext.setRows(20);
        txtrPlaintext.setWrapStyleWord(true);
        txtrPlaintext.setLineWrap(true);

        final JTextArea txtrKey = new JTextArea();
        txtrKey.setLineWrap(true);
        txtrKey.setColumns(10);
        txtrKey.setText("1234567890123456"); //"Key");
         
        JButton encryptBut = new JButton("Encrypt");
        encryptBut.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
                String keyText = txtrKey.getText();
                String pText = txtrPlaintext.getText();
                if(keyText.length() == 16 && (pText.length() > 0)) {
//                cryptoTool = new AESImplementation(keyText);
                txtrPlaintext.append("cryptoTool.encrypt(pText)");
                }
                else {
                    if(!(keyText.length() == 16))
                        txtrKey.setText("Keys must be 16 characters long, a.k.a: A 128 bit key.");
                    if(!(pText.equals(null)||!pText.equals(""))) 
                        txtrPlaintext.setText("Please enter some text here");
                }
            }
        });
        encryptBut.setSize(25,25);
        encryptBut.setLocation(10,50);
         
         
        txtrPlaintext.setText("Plaintext");
         
        JButton btnDecrypt = new JButton("Decrypt");
        btnDecrypt.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
                String keyText = txtrKey.getText();
                String pText = txtrPlaintext.getText();
                if(keyText.length() == 16 && (!pText.equals(null)||!pText.equals(""))) {
//                cryptoTool = new AESImplementation(keyText);
                txtrPlaintext.setText("cryptoTool.decrypt(pText)");
                }
                else {
                    if(!(keyText.length() == 16))
                        txtrKey.setText("Keys must be 16 characters long, a.k.a: A 128 bit key.");
                    if(!(pText.equals(null)||!pText.equals(""))) 
                        txtrPlaintext.setText("Please enter some text here");   
                }
            }
        });
        btnDecrypt.setSize(encryptBut.getWidth(), btnDecrypt.getHeight());
/*
        GroupLayout gl_appPanel = new GroupLayout(appPanel);
        gl_appPanel.setHorizontalGroup(
            gl_appPanel.createParallelGroup(Alignment.LEADING)
                .addGroup(gl_appPanel.createSequentialGroup()
                    .addGap(27)
                    .addGroup(gl_appPanel.createParallelGroup(Alignment.LEADING)
                        .addComponent(txtrPlaintext, Alignment.TRAILING, GroupLayout.DEFAULT_SIZE, 214, Short.MAX_VALUE)
                        .addGroup(gl_appPanel.createSequentialGroup()
                            .addComponent(encryptBut)
                            .addPreferredGap(ComponentPlacement.RELATED, 63, Short.MAX_VALUE)
                            .addComponent(btnDecrypt))
                        .addComponent(txtrKey, GroupLayout.PREFERRED_SIZE, 214, GroupLayout.PREFERRED_SIZE))
                    .addGap(27))
        );
        gl_appPanel.setVerticalGroup(
            gl_appPanel.createParallelGroup(Alignment.TRAILING)
                .addGroup(gl_appPanel.createSequentialGroup()
                    .addContainerGap()
                    .addComponent(txtrKey, GroupLayout.PREFERRED_SIZE, 26, GroupLayout.PREFERRED_SIZE)
                    .addPreferredGap(ComponentPlacement.UNRELATED)
                    .addComponent(txtrPlaintext, GroupLayout.DEFAULT_SIZE, 160, Short.MAX_VALUE)
                    .addPreferredGap(ComponentPlacement.UNRELATED)
                    .addGroup(gl_appPanel.createParallelGroup(Alignment.BASELINE)
                        .addComponent(encryptBut)
                        .addComponent(btnDecrypt))
                    .addGap(23))
        );
         
         
        appPanel.setLayout(gl_appPanel);
*/
        appFrame.add(scrPane,BorderLayout.EAST);      // This works  <<<<<<<<<<<<<<<<
    //  areaScrollPane.getViewport().add(txtrPlaintext);
    //  appPanel.add(scrp);
        appFrame.setVisible(true); //how();
        // Display the appFrame.
    }
     
     
     
    /**
     * @param args
     */
    public static void main(String[] args) {
         
        MainWindow newWindow = new MainWindow();
    }
}

[christopherx]

I wrote this, and it worked a treat:

import java.awt.Dimension;
import javax.swing.*;
public class Tester extends JFrame {
	
	public Tester()
	{
		setSize(300,300);
		JPanel thisPanel = new JPanel();
		add(thisPanel);
		JTextArea thisArea = new JTextArea();
		thisArea.setText("TEXT");
		thisPanel.add(thisArea);
		JScrollPane scrPane = new JScrollPane(thisArea);
		scrPane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
		scrPane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
		thisArea.setLineWrap(true);
		scrPane.setPreferredSize(new Dimension(100,100));
		thisPanel.add(scrPane);
		show();
	}
		
	public static void main(String[] args)
	{
		Tester test = new Tester();
	}
}

I'm gonna go through the code that eclipse has generated and see if I can't find out why my code in my mainwindow class won't work. I guess if this works, then there's no reason why it shouldn't work in my problem code! Thanks for the help guys :)

[christopherx]

Riight! Well at least now I know where too look. I was hoping I could just comment all of that out but then the buttons and the rest of the GUI disapear :( I'll give it a good look. Thankyou for the help guys!