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  1. 08-21-2008, 05:38 PM #1
    alon2580
    alon2580 is offline Member
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    Default Jpanel won't refresh

    Hi,
    During an installer that I'm making,I have a panel that ask a user for 4 details(i.e 4 text fields),
    after that action I added a check to see whether all the fields were filled and if not goes back to the custom panel for completion.
    The problem is that once the check fails(i.e not all the fields were filled)and it goes back to the panel, no matter what you type in-it doesn't recognize it and refuse to continue,and check keeps on failing no matter what you do.
    I know its related to refreshing cause even if the user is filling the missing fields and pressing OK the Jpanel isn't catching it.
    I'm using JDK 1.5.012
    I'm also attaching my code.
    10x.

    p.s I also have a fifth field which is editable only when the user checks a check box. I also have problems with it but that is a different story

    Java Code: 
    package ****;		 
import java.awt.*;
import com.zerog.ia.api.pub.*;
import java.io.*;
import javax.swing.*;
import java.awt.event.*;


public class CustomPanel extends CustomCodePanel implements ItemListener
{
    //Constructor
    public CustomPanel (){
        selected=false;
    }
private boolean selected;
    private JLabel HostLabel,PortLabel,UsernameLabel1,UsernameLabel2,PasswordLabel1,PasswordLabel2,Caption1,Caption2,Caption3,DomainLabel;
    private Frame frame;
    private JPanel panel;
    private JTextField HostField,PortField,UsernameField1,UsernameField2,field4,DomainNameField;
    private JPasswordField passwordfield1,passwordfield2;
    private JCheckBox check;
    private int i=0;
    GUIAccess gui;
    CustomCodePanelProxy ccpp;


    public boolean setupUI(CustomCodePanelProxy customCodePanelProxy)
    {
        //set the main panel
        panel=new JPanel();
        panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
        panel.setBackground(new Color(255,255,255));

        //Get the frame (window that displays all stuff)
        ccpp = customCodePanelProxy;
        gui = (GUIAccess)customCodePanelProxy.getService(com.zerog.ia.api.pub.GUIAccess.class);
        frame = gui.getFrame();

        //put components

        //put the first Caption
        Caption1 = new JLabel("<html>Database connection parameters<br></html>");
        Caption1.setFont((Caption1.getFont()).deriveFont(14));
        panel.add(Caption1);
        panel.revalidate();
        panel.repaint();


        //put the Host label and the HostTextField
        HostLabel = new JLabel("Host:");
        HostLabel.setFont((HostLabel.getFont()).deriveFont(14));
        panel.add(HostLabel);
        panel.revalidate();
        panel.repaint();
        HostField =new JTextField(20);
        HostField.setEditable(true);
        HostField.setBorder(BorderFactory.createLineBorder(new Color(0,0,0)));
        HostField.setText("localhost");
        panel.add(HostField);
        panel.revalidate();
        panel.repaint();


        //put the Port label and the PortTextField
        PortLabel = new JLabel("Port:");
        PortLabel.setFont((PortLabel.getFont()).deriveFont(14));
        panel.add(PortLabel);
        panel.revalidate();
        panel.repaint();
        PortField =new JTextField(20);
        PortField.setEditable(true);
        PortField.setBorder(BorderFactory.createLineBorder(new Color(0,0,0)));
        PortField.setText("3728");
        panel.add(PortField);
        panel.revalidate();
        panel.repaint();


        //put the second Caption
        Caption2 = new JLabel("User to create tables");
        Caption2.setFont((Caption2.getFont()).deriveFont(14));
        panel.add(Caption2);
        panel.revalidate();
        panel.repaint();


        //put the Usernamr label and the UsernameTextField
        UsernameLabel1 = new JLabel("User:");
        UsernameLabel1.setFont((UsernameLabel1.getFont()).deriveFont(14));
        panel.add(UsernameLabel1);
        panel.revalidate();
        panel.repaint();
        UsernameField1 =new JTextField(20);
        UsernameField1.setEditable(true);
        UsernameField1.setBorder(BorderFactory.createLineBorder(new Color(0,0,0)));
        panel.add(UsernameField1);
        panel.revalidate();
        panel.repaint();


        //put the Password label and the PasswordTextField
        PasswordLabel1 = new JLabel("Password:");
        PasswordLabel1.setFont((PasswordLabel1.getFont()).deriveFont(14));
        panel.add(PasswordLabel1);
        panel.revalidate();
        panel.repaint();
        passwordfield1 =new JPasswordField(20);
        passwordfield1.setEditable(true);
        passwordfield1.setBorder(BorderFactory.createLineBorder(new Color(0,0,0)));
        panel.add(passwordfield1);
        panel.revalidate();
        panel.repaint();

        //adding the CheckBox and the follow TextField
        check = new JCheckBox ("Windows autehntication exist",false);
        check.setBackground(new Color(255,255,255));
        panel.add(check);
        panel.revalidate();
        panel.repaint();
        DomainLabel = new JLabel("Domain");
        DomainLabel.setFont((DomainLabel.getFont()).deriveFont(14));
        panel.add(DomainLabel);
        panel.revalidate();
        panel.repaint();
        DomainNameField =new JTextField(20);
        DomainNameField.setEditable(selected);
        DomainNameField.setBorder(BorderFactory.createLineBorder(new Color(0,0,0)));
        panel.add(DomainNameField);
        panel.revalidate();
        panel.repaint();
        add(BorderLayout.NORTH,panel);

        //Add the listener
        check.addItemListener(this);

        return true;	// true if you want your panel displayed or false if not
    Last edited by alon2580; 08-22-2008 at 11:01 AM.
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  2. 08-21-2008, 07:08 PM #2
    hardwired's Avatar
    hardwired
    hardwired is offline Senior Member
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    The code you posted has nothing to do with your validation problems.
    You do need to call revalidate and repaint after adding every component, java will do that for you when the gui is realized.
    For validation try the InputVerifier class. The api comments section has an example of how to use it.
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  3. 08-22-2008, 11:04 AM #3
    alon2580
    alon2580 is offline Member
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    Quote Originally Posted by hardwired View Post
    The code you posted has nothing to do with your validation problems.
    You do need to call revalidate and repaint after adding every component, java will do that for you when the gui is realized.
    For validation try the InputVerifier class. The api comments section has an example of how to use it.
    thanks for the quick reply
    I'm pretty new to Java.
    So I have 2 questions:
    1)Do I or do I not need to call revalidate and repaint?(I didn't understand)
    2)Can you please be more specific about that class?
    Thanks again
    Last edited by alon2580; 08-22-2008 at 11:05 AM. Reason: fixed typo
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  4. 08-22-2008, 05:26 PM #4
    hardwired's Avatar
    hardwired
    hardwired is offline Senior Member
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    1)Do I or do I not need to call revalidate and repaint?(I didn't understand)
    No, you do not need to call revalidate and repaint during construction, ie, before the gui is realized which happens after a call to either pack or setVisible on its top-level container (eg, JFrame).

    2)Can you please be more specific about that class?
    Lookup the InputVerifier class api in the javadocs and look toward the top of the page in a section of comments/general dicussion about the class and how to use it. There is a short code example showing how to use InputVerifier to insure proper input in a textComponent before shifting focus away from it.
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