dynamically resizing jpanel

[Samer Telawi]

Hello every body:
I have JPanel with many JButtons inside in one row and I am using flow layout to add them
how to make the panel that contains these buttons dynamically extends vertically when it is being resized horizontally to show the all buttons.
because i tried to do that but the button as I said in one row so when I resize the panel some of them disappear according to new size of the panel
so, would you please let me know how to make these buttons shift to two rows or more in that I need to panel to be extended vertically at the same time I need to keep the panel's size fitted with its components ... I mean
no need to make the panel size bigger then it is needed to hold the whole components.

I think this depends on the layout I tried many but it seems there is still something missing ...
one more important note : below this panel there is another panel so when the top panel is extended vertically the panel that is below it should be shifted to the bottom to give the top panel more space ...
thank you for your help

[Rob Camick]

Try the Wrap Layout.

[Samer Telawi]

hello again ..
I added this post to clear what I want to do exactly:
in this application I have mainPanel that includes leftPanel and rightPanel that are separated by splitPane
now the main work is in the rightPanel
I defined GridBagLayout for this panel to organize the items in one columns so this rightPanel will includes subpanels like p1,p2,p3,p4 etc.....
that works well till now
each subpanel includes a button and another panel below that button so also I used GridBagLayout for the subpanel (p1,p2,p3....) to organize their components in one column.
so let say that the subpanel p1 includes button1 and other sub-subpanel pp1
I defined flowlayout for pp1 and added some buttons
the idea here is when I click on button1 this should hide pp1 with its buttons and and the second panel p2 is shifted up to occupy the new available space and when clicking again on button 1 the pp1 should appear again and p2 should be shifted down to give more space for
the p1 after adding pp1 to it. this is explained in photo1 and photo2.

but the problem is when I resize the right panel horizontally I want the panel pp1 to be resized to a size that fits with its components
in other word it should be capable for extending vertically to decrease or increase its height according to the need to make the whole component seen.
photo 3 and 4 show you some
and I attached the code so may some one can help me about solving this problem.
thank you
waiting for your response.

[Samer Telawi]

and here is another photo and the code

public class SecondFrame extends JFrame {

	private JPanel contentPane,leftPanel,rightPanel;
	private JButton b1,b2,b3,b4;
	private JPanel p1,p2,p3,p4;
	private JPanel pp1,pp2;
	private boolean clicked = false;
	private JButton t1,t2,t3,t4,t5;
	private ItemPanel pp3,pp4;
	/*
	 * the following components are used in pp3 to handle the table ....
	 */
	JLabel l1,l2,l3,l4;
	JTextField tf1,tf2,tf3,tf4;
	JComboBox cb1,cb2;
	JButton button1,button2,button3Button;
	
	Icon plusIcon;
	Icon minusIcon;
	
	
	GridBagConstraints gbc;

	/**
	 * Launch the application.
	 */
	public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				try {
					SecondFrame frame = new SecondFrame();
					frame.setVisible(true);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
	}

	/**
	 * Create the frame.
	 */
	public SecondFrame() {
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setBounds(100, 100, 700, 500);
		contentPane = new JPanel();
		contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
		contentPane.setLayout(new BorderLayout(0, 0));
		setContentPane(contentPane);
		
		JSplitPane splitPane = new JSplitPane();
		contentPane.add(splitPane, BorderLayout.CENTER);
		
		leftPanel = new JPanel();
		leftPanel.setPreferredSize(new Dimension(400, 10));
		
		splitPane.setLeftComponent(leftPanel);
		
		rightPanel = new JPanel();
		//rightPanel.setPreferredSize(new Dimension(200,10));
		/*
		 * adding Component listener using Component Adatper class.
		 */
		rightPanel.addComponentListener(new ComponentAdapter(){
			public void componentResized(ComponentEvent event){
				System.out.println("the panels has been resized");
				//pp1.setPreferredSize(pp1.getPreferredSize());
				pp1.revalidate();
				pp1.repaint();
				//p1.setPreferredSize(p1.getPreferredSize());
				p1.revalidate();
				p1.repaint();
				//rightPanel.setPreferredSize(rightPanel.getPreferredSize());
				rightPanel.revalidate();
				rightPanel.repaint();
				
				
			}
		});
		JScrollPane scroller = new JScrollPane(rightPanel);
		scroller.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
		splitPane.setRightComponent(scroller);
		GridBagLayout layout = new GridBagLayout();
		rightPanel.setLayout(layout);
		rightPanel.setBackground(Color.green);
		gbc = createGBC(0,0,1,1,1,0,GridBagConstraints.NORTH,GridBagConstraints.HORIZONTAL);
		b1 = new JButton("Button1");
		b1.setHorizontalAlignment(SwingConstants.LEFT);
		plusIcon = new ImageIcon("icons/plus-icon.png");
		minusIcon = new ImageIcon("icons/minus-icon.png");
		b1.setIcon(minusIcon);
		p1 = new JPanel();
		p1.setBackground(Color.black);
		rightPanel.add(p1,gbc);
		p1.setLayout(layout);
		p1.add(b1, gbc);
		pp1 = new JPanel();
		pp1.setBackground(Color.red);
		pp1.setPreferredSize(new Dimension(10,80));
		gbc = createGBC(0,1,1,1,1,1,GridBagConstraints.NORTH,GridBagConstraints.HORIZONTAL);
		p1.add(pp1, gbc);
		p2 = new JPanel();
		p2.setBackground(Color.blue);
		rightPanel.add(p2,gbc);
		b2 = new JButton("Button2");
		p2.setLayout(layout);
		gbc = createGBC(0,0,1,1,1,0,GridBagConstraints.NORTH,GridBagConstraints.HORIZONTAL);
		pp2 = new JPanel();
		pp2.setPreferredSize(new Dimension(10,80));
		p2.add(b2, gbc);
		gbc = createGBC(0,1,1,1,1,0,GridBagConstraints.NORTH,GridBagConstraints.HORIZONTAL);
		p2.add(pp2,gbc);
		
		p3 = new JPanel();
		p3.setBackground(Color.cyan);
		p3.setLayout(layout);
		b3 = new JButton("Button3");
		//pp3 = new JPanel();
		//pp3.setPreferredSize(new Dimension(10,80));
		
		
		// this part was added in 10/07/2013 to simulate the table but by using components.
		//JLabel l1,l2,l3,l4;
		//JTextField tf1,tf2,tf3,tf4;
		//JComboBox cb1,cb2;
		//JButton button1,button2,button3Button;
		//pp3.setLayout(layout);
		//l1 = new JLabel("Type");
		//l1.setAlignmentX(LEFT_ALIGNMENT);
		//l1.setBorder(BorderFactory.createLineBorder(Color.black));
		///gbc = createGBC(0,0,1,1,1,0,GridBagConstraints.NORTH,GridBagConstraints.HORIZONTAL);
		//pp3.add(l1,gbc);
		//button1 = new JButton("button");
		//tf1 = new JTextField("Bipolar");
		//tf1.setBorder(BorderFactory.createLineBorder(Color.black));
		//gbc = createGBC(1,0,1,1,1,0,GridBagConstraints.NORTH,GridBagConstraints.HORIZONTAL);
		//pp3.add(tf1,gbc);
		//JPanel panel = createRow(l1,tf1);
		//pp3.add(panel, gbc	);
		
		pp3 = new ItemPanel();
		
		
		
		
		
		
		
		
		
		gbc = createGBC(0,0,1,1,1,0,GridBagConstraints.NORTH,GridBagConstraints.HORIZONTAL);
		p3.add(b3,gbc);
		gbc = createGBC(0,1,1,1,1,0,GridBagConstraints.NORTH,GridBagConstraints.HORIZONTAL);
		p3.add(pp3,gbc);
		gbc = createGBC(0,2,1,1,1,1,GridBagConstraints.NORTH,GridBagConstraints.HORIZONTAL);
		//rightPanel.add(p3,gbc);
		
		//gbc = createGBC(0,3,1,1,1,0,GridBagConstraints.NORTH,GridBagConstraints.HORIZONTAL);
		//rightPanel.add(p3,gbc);
		p4 = new JPanel();
		//////////////////////////////////////
		FlowLayout flowLayout = new FlowLayout(FlowLayout.LEFT);
		flowLayout.setHgap(0);
		flowLayout.setVgap(0);
		//Dimension dimpp1 = flowLayout.minimumLayoutSize(pp1);
		pp1.setLayout(flowLayout);
		//pp1.setSize(dimpp1);
		t1 = new JButton("Next 1");
		t2 = new JButton("Next 2");
		t3 = new JButton("Next 3");
		t4 = new JButton("Next 4");
		t5 = new JButton("Next 5");
		pp1.add(t1);
		pp1.add(t2);
		pp1.add(t3);
		pp1.add(t4);
		//////////////////////////////////////
		
		b1.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				if(!clicked){
					p1.remove(pp1);
					b1.setIcon(plusIcon);
					clicked = true;
				}else{
					clicked = false;
					gbc = createGBC(0,1,1,1,1,0,GridBagConstraints.NORTH,GridBagConstraints.HORIZONTAL);
					p1.add(pp1, gbc);
					b1.setIcon(minusIcon);
					pp1.revalidate();
					pp1.repaint();
				}
				
				p1.repaint();
				p1.revalidate();
				p1.repaint();
				rightPanel.revalidate();
				rightPanel.repaint();
			
			}
		});
		
	}
	
	 private GridBagConstraints createGBC(int x, int y, int gw, int gh, int wx, int wy, int a , int f) {
	      GridBagConstraints gbc = new GridBagConstraints();
	      gbc.gridx = x;
	      gbc.gridy = y;
	      gbc.gridwidth = gw;//the component will occupy 1 cell wide within layout.
	      gbc.gridheight = gh;//the component will occupy 1 cell height within layout.
	      gbc.weightx = wx;// the component will get any extra horizontal space
	      gbc.weighty = wy;// the component will get any extra vertical space.
	      gbc.anchor = a;//(x == 0) ? gbc.LINE_START : gbc.LINE_END;
	      gbc.fill = f;//(x == 0) ? gbc.BOTH : gbc.HORIZONTAL;
	      gbc.insets = (x == 0) ? new Insets(5, 5, 5, 5) : new Insets(5, 5, 5, 5);
	      return gbc;
	   }
	 private JPanel createRow(JLabel label, JTextField textField){
		 JPanel panel = new JPanel();
		 label.setHorizontalAlignment(SwingConstants.LEFT);
		 textField.setHorizontalAlignment(SwingConstants.LEFT);
		 panel.add(textField);
		 panel.add(label);
		 return panel;
	 }


}