Adding panels into a panel

[kcakir]

I am trying to develop a specific panel which includes 3 panels and one of them also includes 5 panels but only one of them seen on the screen
the code:

import java.awt.Color;
import java.awt.Container;
//import java.awt.LayoutManager;
import javax.swing.JPanel;


public class MiddlePanel extends JPanel {
/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
private JPanel stonearea1;
private JPanel stonearea2;
private JPanel seriarea;
 private JPanel seri1;
 private JPanel seri2;
 private JPanel seri3;
 private JPanel seri4;
 private JPanel seri5;
 
public MiddlePanel(int x,int y,int w,int h) {
	super();
	// TODO Auto-generated constructor stub
	
	this.setBounds(x, y, w, h);
	this.setLayout(null);
	this.initComp();
}

private void initComp(){
 System.out.println("x "+this.getX()+"y "+this.getY()+"wid "+this.getWidth()+"h "+this.getHeight());
 this.stonearea1 = new JPanel();
  stonearea1.setBounds(this.getX(),this.getY(),this.getWidth()/3,this.getHeight());  
  stonearea1.setToolTipText("stonearea1");
  stonearea1.setBackground(Color.black);
  System.out.println("stone1 "+this.stonearea1.getHeight());
 this.stonearea2 = new JPanel();
  stonearea2.setBounds(this.getX()+this.stonearea1.getWidth(), this.getY(), this.getWidth()/3,this.getHeight());
  stonearea2.setToolTipText("stonearea2"); 
  stonearea2.setBackground(Color.red);
  System.out.println("stone2 "+this.stonearea2.getX()+" y "+this.stonearea2.getY());
 this.seriarea = new JPanel(null);
 seriarea.setToolTipText("seriarea");
  seriarea.setBackground(Color.yellow);
  seriarea.setBounds(this.getX()+this.stonearea1.getWidth()+this.stonearea2.getWidth(),this.getY(),this.getWidth()/3,this.getHeight());
  this.seri1 = new JPanel();
  seri1.setBounds(seriarea.getX(), seriarea.getY(), seriarea.getWidth()/4, (3*seriarea.getHeight())/4);
  seri1.setToolTipText("seri1");
  this.seri2 = new JPanel();
  seri2.setBounds(seriarea.getX()+(seriarea.getWidth()/4), seriarea.getY(), seriarea.getWidth()/4, (3*seriarea.getHeight())/4);
  seri1.setToolTipText("seri2");
  this.seri3 = new JPanel();
  seri3.setBounds(seriarea.getX()+(seriarea.getWidth()/2), seriarea.getY(), seriarea.getWidth()/4, (3*seriarea.getHeight())/4);
  seri1.setToolTipText("seri3");
  this.seri4 = new JPanel();
  seri4.setBounds(seriarea.getX()+3*(seriarea.getWidth()/4), seriarea.getY(), seriarea.getWidth()/4, (3*seriarea.getHeight())/4);
  seri1.setToolTipText("seri4");
  this.seri5 = new JPanel();
  seri5.setBounds(seriarea.getX(),seriarea.getY()+3*(seriarea.getHeight()/4), seriarea.getWidth(), seriarea.getHeight()/4);
  seri5.setToolTipText("seri1");
  this.seriarea.add(seri1);
  this.seriarea.add(seri2);
  this.seriarea.add(seri3);
  this.seriarea.add(seri4);
  this.seriarea.add(seri5);
  System.out.println("seriarea count "+this.seriarea.getComponentCount());
  
  this.add(stonearea1);
  this.add(stonearea2);
  this.add(seriarea);
  
 this.setVisible(true);
 System.out.println("count "+this.getComponentCount());
}

}

On the screen only stonarea1 is shown. !!!

[PhHein]

Use nested LayoutManagers.

[kcakir]

I want to know what is wrong in the code . if I dont want to use layout managers

[sky]

I think the problem is that you are actually using layout manayers. Each component has one by default, so maybe they are putting one in the top of the other.

[kcakir]

But i wrote setLayout(null) in the constructor for the biggest panel and for the third panel also,
the other two panel does not have any sub components. On the other hand although i tried setlayout null for all of them it does not work.

[sky]

But i wrote setLayout(null) in the constructor for the biggest panel and for the third panel also,
the other two panel does not have any sub components. On the other hand although i tried setlayout null for all of them it does not work.

Maybe that is exactly the reason and with NullLayout they put one on the top of each other. Try commenting those lines.

[kcakir]

Oh my god !!!
In fact it works correct but i always test my code eclipse appletviewer and it creates a html page and gives width and height values 200 automatically so i couldn't see the all screen.
I am testing from the original source now. :):):)

[zweibieren]

The problem was a result of a misuse of null layouts.
The bounds assigned for seri1, ser2, ... were relative to MiddlePanel,
but they have to be relative to seriarea, their parent Container.
A LayoutManager automatically does layout relative to the parent.

Without a layout manager the code also has to account for the fact
that the contentPane is not the full height of the JFrame.
That is the purpose of TITLESIZEKLUDGEFORNULLLAYOUT.

I also took pains to ensure that roundoff error did not prevent the layouts
from fully and exactly covering their parents.
In the original code, seri5 overlapped the bottom edge of the other serix-s.

package Test;

import java.awt.*;
import javax.swing.*;

public class TestNullLayout extends JFrame {
	final static int TITLESIZEKLUDGEFORNULLLAYOUT = 32;

	public TestNullLayout() {
		super("TestNullLayout");
		setDefaultCloseOperation(EXIT_ON_CLOSE);
		setPreferredSize(new Dimension(300, 150));
		add(new MiddlePanel(0, 0,
				300, 150 - TITLESIZEKLUDGEFORNULLLAYOUT));
		pack();
	}

	public class MiddlePanel extends JPanel {

		private static final long serialVersionUID = 1L;
		private JPanel stonearea1;
		private JPanel stonearea2;
		private JPanel seriarea;
		private JPanel seri1;
		private JPanel seri2;
		private JPanel seri3;
		private JPanel seri4;
		private JPanel seri5;

		public MiddlePanel(int x, int y, int w, int h) {
			super(null);
			setToolTipText("MiddlePanel");
			setBounds(x, y, w, h);
			initComp();
		}

		private void dumpBounds(JPanel p) {
			System.out.println("bounds for " + p.getToolTipText()
					+ " are " + p.getBounds());
			Insets ins = p.getInsets();
			if (ins.top != 0 || ins.right != 0 || ins.bottom != 0 || ins.left != 0 )
				System.out.println("                      insets are" + ins);
			int comps = p.getComponentCount();
			if (comps > 0)
					System.out.println("                      has " + comps + " components");
		}

		private void initComp() {
			stonearea1 = new JPanel();
			stonearea1.setBounds(getX(), getY(), getWidth() / 3, getHeight());
			stonearea1.setToolTipText("stonearea1");
			stonearea1.setBackground(Color.black);
			stonearea2 = new JPanel();
			stonearea2.setBounds(getX() + stonearea1.getWidth(), getY(),
					getWidth() / 3, getHeight());
			stonearea2.setToolTipText("stonearea2");
			stonearea2.setBackground(Color.red);
			seriarea = new JPanel(null);
			seriarea.setToolTipText("seriarea");
			seriarea.setBackground(Color.yellow);
			int x3 = stonearea2.getX() + stonearea2.getWidth();
			seriarea.setBounds(x3, getY(), getWidth() - x3, getHeight());
			int topH = 3 * seriarea.getHeight() / 4;
			int topW = seriarea.getWidth() / 4;
			seri1 = new JPanel();
			seri1.setBounds(0, 0, topW, topH);
			seri1.setToolTipText("seri1");
			seri1.setBackground(Color.BLUE);
			seri2 = new JPanel();
			seri2.setBounds(topW, 0, topW, topH);
			seri2.setToolTipText("seri2");
			seri2.setOpaque(false);
			seri3 = new JPanel();
			seri3.setBounds(2 * topW, 0, topW, topH);
			seri3.setToolTipText("seri3");
			seri3.setBackground(Color.GREEN);
			seri4 = new JPanel();
			seri4.setBounds(3 * topW, 0, seriarea.getWidth() - 3 * topW, topH);
			seri4.setToolTipText("seri4");
			seri5 = new JPanel();
			seri5.setBounds(0, topH, seriarea.getWidth(), seriarea.getHeight() - topH);
			seri5.setToolTipText("seri5");
			seriarea.add(seri1);
			seriarea.add(seri2);
			seriarea.add(seri3);
			seriarea.add(seri4);
			seriarea.add(seri5);

			add(stonearea1);
			add(stonearea2);
			add(seriarea);

			dumpBounds(this);
			dumpBounds(stonearea1);
			dumpBounds(stonearea2);
			dumpBounds(seriarea);
			dumpBounds(seri1);
			dumpBounds(seri2);
			dumpBounds(seri3);
			dumpBounds(seri4);
			dumpBounds(seri5);
		}
	}

	/**
	 * @param args the command line arguments
	 */
	public static void main(String[] args) {
		new TestNullLayout().setVisible(true);
	}
}