layers

[basia fish]

hi

my gui:
has:
1. toolbar
2. main panel divided into two panels (left and right)

depending on which button in toolbar is presed i would like to display diffrent panels in those two panels

i tried putting those diffrent panels into diffrent layers and then calling diffrent layers according to which button is presed

however it is not really working
i am posting my simplified code

any help would be appreciated
if there is better way to implement it please help

bbarbara okupna

public class mainClass extends JFrame implements ActionListener
{
JLayeredPane layeredPaneLeft;
JFrame frame;
JPanel leftPanelAddEdit;

public void createAndDisplayGui()
{
frame = new JFrame("HelloWorldSwing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(1200,1000);

JPanel leftPanel = new JPanel();
leftPanel.setBorder(BorderFactory.createTitledBorder("sdsdsds"));

JToolBar toolBar = new JToolBar();

toolBar.add(Button("Add New"));

JPanel mainPanel = new JPanel();


leftPanelAddEdit = new JPanel();
leftPanelAddEdit.add(leftPanel);


layeredPaneLeft = new JLayeredPane();
layeredPaneLeft.add(leftPanelAddEdit, 1);

mainPanel.add(layeredPaneLeft);


frame.getContentPane().add(toolBar,BorderLayout.NORTH);
frame.getContentPane().add(layeredPaneLeft,BorderLayout.WEST);

frame.show();


}



public JButton Button( String name)
{
JButton button = new JButton(name);
button.setActionCommand(name);
button.addActionListener(this);
return button;

}

public void actionPerformed(ActionEvent e) {
if ("Add New".equals(e.getActionCommand())) {

layeredPaneLeft.moveToFront(leftPanelAddEdit );

}
}

public static void main(String[] args)
{
mainClass f = new mainClass();
f.mainClassnn();
}
}

[Gregg Bolinger]

barbzx

Welcome to Javaranch!

As you know this is a great community in which to learn Java and we don't have too many rules around here, but we do have a Naming Policy. Please read this policy and adjust your display name accordingly.

You can change your display name here.

Thanks.

[Craig Wood]

CardLayout does a nice job of managing panels in a small space. It has a show method that will show any specific panel

    displayPanel.leftCards.show(displayPanel.left, "red");

if you don't like the next and previous methods. See CardLayout api for more.

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
 
public class LayoutTest
{
    public static void main(String[] args)
    {
        DisplayPanel panel = new DisplayPanel();
        ToolPanel tools = new ToolPanel(panel);
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(tools, "North");
        f.getContentPane().add(panel);
        f.setSize(500,400);
        f.setLocation(200,200);
        f.setVisible(true);
    }
}
 
/**
 * North section of JFrame BorderLayout.
 */
class ToolPanel extends JPanel implements ActionListener
{
    DisplayPanel displayPanel;
    JButton lastLeft, nextLeft, lastRight, nextRight;
 
    public ToolPanel(DisplayPanel dp)
    {
        displayPanel = dp;
        lastLeft = new JButton("last left");
        nextLeft = new JButton("next left");
        lastRight = new JButton("last right");
        nextRight = new JButton("next right");
        lastLeft.addActionListener(this);
        nextLeft.addActionListener(this);
        lastRight.addActionListener(this);
        nextRight.addActionListener(this);
        add(lastLeft);
        add(nextLeft);
        add(lastRight);
        add(nextRight);
    }
 
    public void actionPerformed(ActionEvent e)
    {
        JButton button = (JButton)e.getSource();
        if(button == lastLeft)
            displayPanel.leftCards.previous(displayPanel.left);
        if(button == nextLeft)
            displayPanel.leftCards.next(displayPanel.left);
        if(button == lastRight)
            displayPanel.rightCards.previous(displayPanel.right);
        if(button == nextRight)
            displayPanel.rightCards.next(displayPanel.right);
    }
}
 
/**
 * Occupies center section of JFrame BorderLayout.
 */
class DisplayPanel extends JPanel
{
    CardLayout leftCards, rightCards;
    JPanel left, right;
 
    public DisplayPanel()
    {
        leftCards = new CardLayout();
        rightCards = new CardLayout();
        left = new JPanel(leftCards);
        right = new JPanel(rightCards);
        JPanel
            red = new JPanel(),
            green = new JPanel(),
            yellow = new JPanel(),
            blue = new JPanel();
        red.setBackground(Color.red);
        green.setBackground(Color.green);
        yellow.setBackground(Color.yellow);
        blue.setBackground(Color.blue);
        left.add("red", red);
        left.add("green", green);
        right.add("yellow", yellow);
        right.add("blue", blue);
        setLayout(new GridBagLayout());
        GridBagConstraints gbc = new GridBagConstraints();
        gbc.weightx = 1.0;
        gbc.weighty = 1.0;
        gbc.fill = gbc.BOTH;
        add(left, gbc);
        add(right, gbc);
    }
}