I have a gui which has a Panel that contains a sequence of labels and TextFields and uses a spring layout(this is the mainPanel) and another Panel that just contains a button(buttonPanel). I am trying to make my mainPanel to have a vertical scrollbar as well. I would like to implement my GUI such that within the JFrame I have 2 panels. The mainPanel appears on the top of the frame and the buttonPanel appears below the mainPanel.
My problem is I am not able to make the Panels appear such that the buttonPanel is below the mainPanel and I am also not sure how to add a scrollbar to the mainPanel. Any help would be appreciated.
EDIT : I was able to solve my issue regarding the JPanels, now my only problem is that I cant get my mainPanel to scroll. I've added my most recent code below :
Here is the code I have so far:
public static void main(String args[]) {
JFrame frame = new JFrame("SpringLayout");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JScrollPane scroll = new JScrollPane();
Container contentPane = frame.getContentPane();
JButton next = new JButton("Next");
JPanel buttonPanel = new JPanel();
buttonPanel.add(next);
SpringLayout layout = new SpringLayout();
JPanel mainPanel = new JPanel();
mainPanel.setLayout(layout);
contentPane.setLayout(new BorderLayout());
int j = 25;
for(int i =0;i<150;i++){
JLabel label = new JLabel("Enter Name " + i );
JTextField text = new JTextField(15);
mainPanel.add(label);
mainPanel.add(text);
layout.putConstraint(SpringLayout.WEST, label, 10, SpringLayout.WEST,
contentPane);
layout.putConstraint(SpringLayout.NORTH, label, j, SpringLayout.NORTH,
contentPane);
layout.putConstraint(SpringLayout.NORTH, text, j, SpringLayout.NORTH,
contentPane);
layout.putConstraint(SpringLayout.WEST, text, 20, SpringLayout.EAST,
label);
j+=30;
}
//mainPanel.setSize(500,800);
scroll.setPreferredSize(new Dimension(500,500));
scroll.setViewportView(mainPanel);
contentPane.add(scroll);
contentPane.add(buttonPanel,BorderLayout.SOUTH);
//mainWindow.add(contentPane);
frame.setSize(500, 600);
frame.setVisible(true);
}
To make it scrollable I just needed to increase the preferred size of my mainPanel such that it would be bigger than the scrollbar.
public static void main(String args[]) {
JFrame frame = new JFrame("SpringLayout");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JScrollPane scroll = new JScrollPane();
Container contentPane = frame.getContentPane();
JButton next = new JButton("Next");
JPanel buttonPanel = new JPanel();
buttonPanel.add(next);
SpringLayout layout = new SpringLayout();
JPanel mainPanel = new JPanel();
mainPanel.setLayout(layout);
contentPane.setLayout(new BorderLayout());
int j = 25;
for(int i =0;i<18;i++){
JLabel label = new JLabel("Enter Name " + i );
JTextField text = new JTextField(15);
mainPanel.add(label);
mainPanel.add(text);
layout.putConstraint(SpringLayout.WEST, label, 10, SpringLayout.WEST,
contentPane);
layout.putConstraint(SpringLayout.NORTH, label, j, SpringLayout.NORTH,
contentPane);
layout.putConstraint(SpringLayout.NORTH, text, j, SpringLayout.NORTH,
contentPane);
layout.putConstraint(SpringLayout.WEST, text, 20, SpringLayout.EAST,
label);
j+=30;
}
mainPanel.setPreferredSize(new Dimension(mainPanel.getWidth(), 1500));
scroll.setPreferredSize(new Dimension(500,500));
scroll.setViewportView(mainPanel);
contentPane.add(scroll);
contentPane.add(buttonPanel,BorderLayout.SOUTH);
//mainWindow.add(contentPane);
frame.setSize(500, 600);
frame.setVisible(true);
}
I can't comment something, to try and compare
notice in this moment I don't understand why SpringLayout and JFrame#pack() doesn't build proper GUI based on PreferredSize, bump in this looks like as (in this moment) my issue too
code with hardcoded JFrame.setSize() instead of proper JFrame#pack()
import java.awt.BorderLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SpringLayout;
import javax.swing.SwingUtilities;
public class Main {
public Main() {
JFrame frame = new JFrame("SpringLayout");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JButton next = new JButton("Next");
JPanel buttonPanel = new JPanel();
buttonPanel.add(next);
SpringLayout layout = new SpringLayout();
JPanel mainPanel = new JPanel();
mainPanel.setLayout(layout);
int j = 25;
for (int i = 0; i < 5; i++) {
JLabel label = new JLabel("Enter Name");
JTextField text = new JTextField(15);
layout.putConstraint(SpringLayout.WEST, label, 10, SpringLayout.WEST,
mainPanel);
layout.putConstraint(SpringLayout.NORTH, label, j, SpringLayout.NORTH,
mainPanel);
layout.putConstraint(SpringLayout.NORTH, text, j, SpringLayout.NORTH,
mainPanel);
layout.putConstraint(SpringLayout.WEST, text, 20, SpringLayout.EAST,
label);
j += 30;
mainPanel.add(label);
mainPanel.add(text);
}
frame.add(mainPanel, BorderLayout.CENTER);
frame.add(buttonPanel, BorderLayout.SOUTH);
frame.setSize(300, 300);
frame.setVisible(true);
}
public static void main(String args[]) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
Main mn = new Main();
}
});
}
}
This is how I would do it:
public static void main(String args[]) {
JFrame frame = new JFrame("SpringLayout");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Container contentPane = frame.getContentPane();
JButton next = new JButton("Next");
JPanel buttonPanel = new JPanel();
buttonPanel.add(next);
GridBagLayout layout = new GridBagLayout();
JPanel mainPanel = new JPanel();
mainPanel.setLayout(layout);
contentPane.setLayout(new BorderLayout());
GridBagConstraints gbc = new GridBagConstraints();
int j = 25;
for (int i = 0; i < 50; i++) {
JLabel label = new JLabel("Enter Name (" + i + ")");
JTextField text = new JTextField(15);
gbc.gridx = 0;
gbc.gridy = i;
mainPanel.add(label, gbc);
gbc.gridx = 1;
mainPanel.add(text, gbc);
}
contentPane.add(new JScrollPane(mainPanel, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED), BorderLayout.CENTER);
contentPane.add(buttonPanel, BorderLayout.SOUTH);
frame.setSize(500, 800);
frame.setVisible(true);
}
Few modifications:
* use GridBagLayout instead of SpringLayout (just because I don't know SpringLayout)
* wrap your mainPanel inside a JScrollPane
Does not look and feel exactly like your example. GridBagConstraints can be tuned.
