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Java Swing - Background of a JPanel


Java Swing - Background of a JPanel

By : Sebastian Puebla Ros
Date : October 28 2020, 04:55 PM
I hope this helps . Try using a JTable and then alternating the colors of the row. This way you can write a generic JComponent (AlternatingColorTable) and use it just like a regular JTable in those 4 panels.
Something like this maybe:
code :


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Java Swing - How to access a JComponent of one JPanel from other JPanel, both added to the JFrame?

Java Swing - How to access a JComponent of one JPanel from other JPanel, both added to the JFrame?


By : user1945016
Date : March 29 2020, 07:55 AM
To fix this issue You can make instance variables that reference the panels when you create them, and use those variables to reference the panels.
code :
public class myFrame extends JFrame {
   public static JPanel buttonPanel;
   public static JPanel statusPanel;

   public static void main(String[] args) {
      buttonPanel = new JPanel();   
   }
}
how to trigger an action in parent JPanel when a component in a child JPanel is updated (Java Swing)

how to trigger an action in parent JPanel when a component in a child JPanel is updated (Java Swing)


By : user42072
Date : March 29 2020, 07:55 AM
To fix the issue you can do You could use a PropertyChangeListener, and in fact one is built into every component. e.g.:
code :
import java.awt.event.*;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;

import javax.swing.*;

@SuppressWarnings("serial")
public class Example extends JFrame {
   public Example() {
      super();
      OuterView theGUI = new OuterView();
      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      setResizable(false);
      add(theGUI);
      pack();
      setVisible(true);
   }

   public static void main(String[] args) {
      SwingUtilities.invokeLater(new Runnable() {
         public void run() {
            new Example();
         }
      });
   }
}

class OuterView extends JPanel {
   private String innerValue = "";

   public OuterView() {
      super();
      InnerView innerPanel = new InnerView();
      innerPanel.addPropertyChangeListener(new PropertyChangeListener() {

         @Override
         public void propertyChange(PropertyChangeEvent evt) {
            if (evt.getPropertyName().equals(InnerView.COMBO_CHANGED)) {
               innerValue = evt.getNewValue().toString();
               System.out.println("new value from inside of OuterView: "
                     + innerValue);
            }
         }
      });
      JButton button = new JButton("display OuterView's model");
      button.addActionListener(new ButtonListener());
      add(innerPanel);
      add(button);
   }

   private class ButtonListener implements ActionListener {
      @Override
      public void actionPerformed(ActionEvent ae) {
         System.out.println("button was clicked. innerValue: " + innerValue);
      }
   }
}

class InnerView extends JPanel {
   public static final String COMBO_CHANGED = "Combo Changed";
   // private SwingPropertyChangeSupport pcSupport = new
   // SwingPropertyChangeSupport(this);
   String oldValue = "";

   public InnerView() {
      super();
      String[] items = new String[] { "item 1", "item 2", "item 3" };
      JComboBox comboBox = new JComboBox(items);
      comboBox.addActionListener(new ComboBoxListener());
      add(comboBox);

   }

   private class ComboBoxListener implements ActionListener {
      @Override
      public void actionPerformed(ActionEvent ae) {
         String text = ((JComboBox) ae.getSource()).getSelectedItem()
               .toString();
         firePropertyChange(COMBO_CHANGED, oldValue, text);
         oldValue = text;
         System.out.println("store " + text + " in InnerView's model");
      }
   }
}
Java swing --JPanel on JPanel not showing up

Java swing --JPanel on JPanel not showing up


By : Le Bug
Date : March 29 2020, 07:55 AM
will be helpful for those in need I recon it's either that your first panel doesn't have a layout manager, in which case you'll need to use setLayout();
or
Dynamic adding JPanel to another JPanel in Java Swing

Dynamic adding JPanel to another JPanel in Java Swing


By : user5854914
Date : March 29 2020, 07:55 AM
Hope that helps Do not use Netbeans automated GUI builder. Drag and Drop GUI building technique is not acceptable in Java community. You have not provided the code so we can't do a code edit. Your images are not available.
But however, this is how you can do it. This is a pure hand code
code :
import java.awt.*;
import java.util.ArrayList;
import javax.swing.*;
import java.util.List;

public class GUIBuilder extends JFrame
{
    private JPanel orderList;
    private JPanel orderListRow;
    private JPanel additionalPanel;

    private List panels = new ArrayList(); //Your List

    private JLabel label1, label2, label3;

    public GUIBuilder()
    {
        label1 = new JLabel("Label 1"); //Create the JLabels
        label2 = new JLabel("Label 2");//Create the JLabels
        label3 = new JLabel("Label 3");//Create the JLabels


        orderList = new JPanel(); //Creating the orderList JPanel
       orderList.setLayout(new BoxLayout(orderList, BoxLayout.Y_AXIS)); //Setting Box layout, and set the direction to Y axis.


        orderListRow = new JPanel(); //Creating the orderListRow JPanel        
        orderListRow.add(label1);

        additionalPanel = new JPanel(); //Creating the additionalPanel JPanel      
        additionalPanel.add(label2);

        orderList.add(orderListRow); //Adding orderListRow into orderList
        orderList.add(additionalPanel); //Adding additionalPanel into orderList

        this.setLayout(new GridLayout(1,1));
        this.add(orderList); //Setting orderList into JFrame

        this.pack(); //Setting JFrame size. This will only take required space
        this.setVisible(true); //Making JFrame Visible
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //When you hit the 'X' button, the program will exit
    }

    public static void main(String[]args)
    {
        try
        {
            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); //Setting the UI into your native platform UI
            new GUIBuilder(); //Calling your program
        }
        catch(Exception e)
        {
            e.printStackTrace(); //If any error occured in setting up UI, print the stack trace
        }
    }
}
import java.awt.*;
import java.util.ArrayList;
import javax.swing.*;
import java.util.List;

public class GUIBuilder extends JFrame
{
    private JPanel orderList;
    private JPanel orderListRow;
    private JPanel additionalPanel;

    private List<JPanel> panels = new ArrayList<JPanel>(); //Your List

    private JLabel label1, label2, label3;

    public GUIBuilder()
    {
        label1 = new JLabel("Label 1"); //Create the JLabels
        label2 = new JLabel("Label 2");//Create the JLabels
        label3 = new JLabel("Label 3");//Create the JLabels


        orderList = new JPanel(); //Creating the orderList JPanel
        orderList.setLayout(new BoxLayout(orderList, BoxLayout.Y_AXIS)); //Setting Box layout, and set the direction to Y axis.


        orderListRow = new JPanel(); //Creating the orderListRow JPanel        
        orderListRow.add(label1);
        panels.add(orderListRow); // Add the panel to the List

        additionalPanel = new JPanel(); //Creating the additionalPanel JPanel      
        additionalPanel.add(label2);
        panels.add(additionalPanel); // Add the panel to the List


        for(int i=0;i<panels.size();i++)
        {
            orderList.add(panels.get(i));
        }



        this.setLayout(new GridLayout(1,1));
        this.add(orderList); //Setting orderList into JFrame

        this.pack(); //Setting JFrame size. This will only take required space
        this.setVisible(true); //Making JFrame Visible
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //When you hit the 'X' button, the program will exit
    }

    public static void main(String[]args)
    {
        try
        {
            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); //Setting the UI into your native platform UI
            new GUIBuilder(); //Calling your program
        }
        catch(Exception e)
        {
            e.printStackTrace(); //If any error occured in setting up UI, print the stack trace
        }
    }
}
Java Swing simple center of JPanel in other JPanel

Java Swing simple center of JPanel in other JPanel


By : Wiwit Widhianto
Date : March 29 2020, 07:55 AM
Any of those help BorderLayout will, by it's nature, give as much of the available space as it can to the CENTER component. This is how it's designed.
If you want the component to be centered within the parent container, BUT maintain it's preferred size, you should consider using a GridBagLayout instead. Without any additional constraints, this should achieve the result you're after
code :
public JPanel loginLayer(){
    JPanel masterPane = new JPanel(new GridBagLayout);

    JPanel centerPane = new JPanel();
    centerPane.setLayout(new BoxLayout(centerPane, BoxLayout.Y_AXIS));

    JLabel label = new JLabel("Swing is overly");
    label.setAlignmentX(Component.CENTER_ALIGNMENT);
    centerPane.add(label);
    JButton button = new JButton("complicated");
    button.setAlignmentX(Component.CENTER_ALIGNMENT);
    centerPane.add(button);
    JTextField textField = new JTextField(10);
    centerPane.add(textField);

    masterPane.add(centerPane);

    // Add additional borders to providing padding around the center pane
    // as you need

    return masterPane;
}
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