I am making a GUI application, and I made a JPanel with JScrollPane. The problem is that when adding elements to it, first few elements taking all available space, which looks ugly. How can I prevent them from that?
Here is the code:
import javax.swing.*;
import java.awt.*;
public class VersionPanel extends JPanel {
private final JPanel panel;
public VersionPanel() {
this.setLayout(new BorderLayout());
this.panel = new JPanel(new GridLayout(0, 1));
JScrollPane scrollPane = new JScrollPane(this.panel);
scrollPane.setPreferredSize(new Dimension(400, 300));
this.add(scrollPane, BorderLayout.CENTER);
}
public void addVersionLabel(VersionLabel label) {
this.panel.add(label);
this.panel.revalidate();
int height = (int) this.panel.getPreferredSize().getHeight();
this.panel.scrollRectToVisible(new Rectangle(0, height, 10, 10));
}
}
Here is the code of VersionLabel:
import javax.swing.*;
import javax.swing.border.BevelBorder;
import java.awt.*;
import java.awt.event.ActionListener;
public class VersionLabel extends JPanel {
private final ActionListener launch;
private final ActionListener delete;
private final ActionListener install;
public VersionLabel(String versionNumber, boolean installed, ActionListener launch, ActionListener delete, ActionListener install) {
this.launch = launch;
this.delete = delete;
this.install = install;
this.setLayout(new GridLayout(1, 2));
this.add(this.getLeftPanel(versionNumber, installed));
this.add(this.getRightPanel(installed));
this.setBorder(new BevelBorder(BevelBorder.RAISED, Color.RED, Color.RED)); //test border
this.setMaximumSize(this.getMinimumSize());
}
private JPanel getLeftPanel(String versionNumber, boolean installed) {
return new JPanel() {{
this.setLayout(new BoxLayout(this, BoxLayout.PAGE_AXIS));
this.add(new JLabel(versionNumber));
this.add(new JLabel(installed ? "Installed" : "Not Installed"));
}};
}
private JPanel getRightPanel(boolean installed) {
return new JPanel(new FlowLayout(FlowLayout.RIGHT)) {{
if(installed) {
this.add(new JButton("Launch") {{ this.addActionListener(launch); }});
this.add(new JButton("Delete") {{ this.addActionListener(delete); }});
} else {
this.add(new JButton("Install") {{ this.addActionListener(install); }});
}
}};
}
}
Thanks to #DontKnowMuchButGettingBetter! I added a new JPanel to my code:
public VersionPanel() {
this.setLayout(new BorderLayout());
this.panel = new JPanel(new GridLayout(0, 1));
JPanel bPanel = new JPanel(new BorderLayout());
bPanel.add(this.panel, BorderLayout.PAGE_START);
JScrollPane scrollPane = new JScrollPane(bPanel);
scrollPane.setPreferredSize(new Dimension(400, 300));
this.add(scrollPane, BorderLayout.CENTER);
}
Related
I'm having a problem were a can't make any of the created buttons visible in my frame.
I am trying to create a Frame with 2 layouts the top part is a blank layout and the bottom layout will have three buttons.
import java.awt.BorderLayout;
import java.awt.Color;
import javax.swing.*;
public class Game_Initiliasation extends JFrame {
int Time;
int Difficulty;
JPanel TopPanel;
JPanel BottomPanel;
Game_Initiliasation(){
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
this.setSize(300, 300);
this.setVisible(true);
TopPanel = new JPanel();
BottomPanel = new JPanel();
TopPanel.setLayout(new BorderLayout());
add(TopPanel, BorderLayout.CENTER);
add(BottomPanel, BorderLayout.SOUTH);
JButton Easy = new JButton("Easy");
JButton Medium = new JButton("Medium");
JButton Difficult = new JButton("Difficult");
/*Easy.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
actionPerformed(evt);
}
});*/
Easy.setVisible(true);
BottomPanel.add(Easy);
BottomPanel.add(Medium);
BottomPanel.add(Difficult);
}
}
this.add(BottomPanel); // Add this line, you will be able to see the buttons
import java.awt.BorderLayout;
import java.awt.Color;
import javax.swing.*;
public class Game_Initiliasation extends JFrame {
int Time;
int Difficulty;
JPanel TopPanel;
JPanel BottomPanel;
Game_Initiliasation(){
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
this.setSize(300, 300);
this.setVisible(true);
TopPanel = new JPanel();
BottomPanel = new JPanel();
TopPanel.setLayout(new BorderLayout());
add(TopPanel, BorderLayout.CENTER);
add(BottomPanel, BorderLayout.SOUTH);
JButton Easy = new JButton("Easy");
JButton Medium = new JButton("Medium");
JButton Difficult = new JButton("Difficult");
/*Easy.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
actionPerformed(evt);
}
});*/
Easy.setVisible(true);
BottomPanel.add(Easy);
BottomPanel.add(Medium);
BottomPanel.add(Difficult);
this.add(BottomPanel); // Add this line, you will be able to see the buttons
}
}
When I run this program, I don't see a scrollbar on the Label. What am I missing?
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Util1
{
public static void main(String[] args)
{
new Util1();
}
public Util1()
{
EventQueue.invokeLater(new Runnable()
{
public void run()
{
JFrame frame = new JFrame("Test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(new ExamplePane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
protected class ExamplePane extends JPanel
{
public ExamplePane()
{
final JPanel panel = new JPanel(new GridBagLayout());
final JLabel message = new JLabel("<html>Hello<br>Hello<br>Hello<br>Hello<br>Hello<br>Hello<br>Hello<br>Hello<br>Hello<br>Hello<br>Hello<br>Hello</html>");
message.setPreferredSize(new Dimension(500, 50));
JScrollPane scroller = new JScrollPane( message, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
scroller.setViewportView(message);
panel.add(scroller);
add(panel);
}
}
}
To see a scrollbar wrap the "message" JLabel into JPanel and then add this JPanel to JScrollPane like bellow:
public ExamplePane() {
final JPanel panel = new JPanel(new GridBagLayout());
final JLabel message = new JLabel("<html>Hello<br>Hello<br>Hello<br>Hello<br>Hello<br>Hello<br>Hello<br>Hello<br>Hello<br>Hello<br>Hello<br>Hello</html>");
message.setPreferredSize(new Dimension(500, 50));
final JPanel messagePanel = new JPanel();
messagePanel.add(message);
JScrollPane scroller = new JScrollPane(messagePanel, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
scroller.setPreferredSize(new Dimension(100, 50));
panel.add(scroller);
add(panel);
}
class CipherGUIFrame extends JFrame {
public CipherGUIFrame() {
super("Caesar Cipher GUI");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setSize(400, 600);
JTextArea area1 = new JTextArea();
JTextArea area2 = new JTextArea();
JSpinner myspinner=new JSpinner();
JPanel mainframe = new JPanel();
mainframe.setLayout(new BoxLayout(mainframe, BoxLayout.Y_AXIS));
JPanel p1 = new JPanel();
JPanel p2 = new JPanel();
JPanel p3 = new JPanel();
p1.setLayout(new BoxLayout(p1, BoxLayout.Y_AXIS));
p2.setLayout(new BoxLayout(p2, BoxLayout.Y_AXIS));
p1.setBorder(BorderFactory.createTitledBorder("Cleartext"));
p2.setBorder(BorderFactory.createTitledBorder("Spinner"));
p3.setLayout(new BoxLayout(p3, BoxLayout.Y_AXIS));
p3.setBorder(BorderFactory.createTitledBorder("Ciphertext"));
p1.add(area1);
p2.add(myspinner);
p3.add(area2);
mainframe.add(p1);
mainframe.add(p2);
mainframe.add(p3);
this.add(mainframe);
}
}
It seems that this code produces something which looks similar to this:
I am trying to tidy this up so it looks cleaner; is there a way to shrink the middle panel or to make the others bigger to make it look nicer?
Don't set the sizes of anything, but instead set the columns and rows of your JTextAreas. Don't use BoxLayout when you don't want its behaviors. Put your JTextAreas in JScrollPanes instead. And don't forget to pack() your JFrame.
import java.awt.BorderLayout;
import javax.swing.*;
public class Cipher2 extends JPanel {
public static final int ROWS = 12;
public static final int COLS = 30;
private JTextArea textArea1 = new JTextArea(ROWS, COLS);
private JTextArea textArea2 = new JTextArea(ROWS, COLS);
public Cipher2() {
setLayout(new BoxLayout(this, BoxLayout.Y_AXIS)); // Box OK here
JScrollPane scroll1 = new JScrollPane(textArea1);
add(wrapComponentWithTitle(scroll1, "Fubar"), BorderLayout.PAGE_START);
add(wrapComponentWithTitle(new JSpinner(), "Spinner"), BorderLayout.CENTER);
scroll1 = new JScrollPane(textArea2);
add(wrapComponentWithTitle(scroll1, "Snafu"), BorderLayout.PAGE_END);
}
private JPanel wrapComponentWithTitle(JComponent component, String title) {
// BoxLayout NOT OK here. Use BorderLayout instead
JPanel wrapPanel = new JPanel(new BorderLayout());
wrapPanel.add(component);
wrapPanel.setBorder(BorderFactory.createTitledBorder(title));
return wrapPanel;
}
private static void createAndShowGui() {
Cipher2 mainPanel = new Cipher2();
JFrame frame = new JFrame("Foo");
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.getContentPane().add(mainPanel);
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGui();
}
});
}
}
I figured out the answer: change Y_AXIS to X_AXIS.
<3
I am adding dynamic JTextField and JLabel in panel1 but I am not able to set the layout of JTextField and JLabel. I need to add JTextfield and JLabel to panel1 and I add panel1 to panel. I need to add JTextFields and JLabels in a Top-Bottom manner and set layout. panel1 and panel are instances of JPanel.
My code :
public class MakeScrollablePanel extends JFrame implements ActionListener
{
static JButton jButton11,jButton12;
static JPanel panel,panel1;
static JTextField jTextFields;
static JLabel label;
static JComboBox<String> jComboBox;
static Dimension dime,dime1,dime2,dime3,dime4,dime5;
static JScrollPane scroll;
private GridBagConstraints panelConstraints = new GridBagConstraints();
BoxLayout bx=null;// #jve:decl-index=0:
int count=1,i=0;
public MakeScrollablePanel()
{
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Show();
add(jButton11);
add(scroll);
dime=new Dimension(600,550);
setSize(dime);
setTitle("Priyank Panel");
setLayout(new FlowLayout());
setLocationRelativeTo(null);
setVisible(true);
setResizable(true);
}
private void Show()
{
jButton11=new JButton("Add Designation");
panel=new JPanel();
bx=new BoxLayout(panel,BoxLayout.Y_AXIS);
scroll=new JScrollPane(panel);
dime1=new Dimension(500,3000);
dime5=new Dimension(500,450);
panelConstraints = new GridBagConstraints();
scroll.setPreferredSize(dime5);
scroll.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
panel.setLayout(bx);
panel.add(Box.createHorizontalBox());
panel.setBorder(LineBorder.createBlackLineBorder());
panel.setBackground(new Color(204, 230 , 255));
jButton11.addActionListener(this);
}
public void actionPerformed(ActionEvent event)
{
if(event.getSource()==jButton11)
{
label=new JLabel("Add Designation "+count +" :-");
jTextFields=new JTextField(30);
panel1=new JPanel();
panel1.setBackground(new Color(204, 230 , 255));
panel1.add(label);
panel1.add(jTextFields);
panel.add(panel1);
panel1.revalidate();
panel.revalidate();
panel.updateUI();
count++;
i++;
}
}
public static void main(String[] args)
{
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
new MakeScrollablePanel();
}
});
}
}
still not working
still I can't see thre any problem with (depsite fact that there is used BoxLayout instead of GridLayout, but result could be very similair in the case that is used many JTextFields)
.
.
from (little bit) modifyied OPs code
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
import javax.swing.SwingUtilities;
import javax.swing.border.LineBorder;
public class MakeScrollablePanel extends JFrame implements ActionListener {
private JButton jButton11, jButton12;
private JPanel panel, panel1;
private JTextField jTextFields;
private JLabel label;
private JComboBox<String> jComboBox;
private Dimension dime, dime1, dime2, dime3, dime4, dime5;
private JScrollPane scroll;
private GridBagConstraints panelConstraints = new GridBagConstraints();
private BoxLayout bx = null;// #jve:decl-index=0:
private int count = 1, i = 0;
public MakeScrollablePanel() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Show();
add(jButton11, BorderLayout.NORTH);
add(scroll);
setTitle("Priyank Panel");
pack();
setVisible(true);
setLocationRelativeTo(null);
setResizable(true);
}
private void Show() {
jButton11 = new JButton("Add Designation");
panel = new JPanel();
bx = new BoxLayout(panel, BoxLayout.Y_AXIS);
scroll = new JScrollPane(panel);
dime5 = new Dimension(500, 150);
panelConstraints = new GridBagConstraints();
scroll.setPreferredSize(dime5);
scroll.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
panel.setLayout(bx);
panel.add(Box.createHorizontalBox());
panel.setBorder(LineBorder.createBlackLineBorder());
panel.setBackground(new Color(204, 230, 255));
jButton11.addActionListener(this);
}
#Override
public void actionPerformed(ActionEvent event) {
if (event.getSource() == jButton11) {
label = new JLabel("Add Designation " + count + " :-");
jTextFields = new JTextField(30);
panel1 = new JPanel();
panel1.setBackground(new Color(204, 230, 255));
panel1.add(label);
panel1.add(jTextFields);
panel.add(panel1);
panel.revalidate();
panel.repaint();
count++;
i++;
}
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
new MakeScrollablePanel();
}
});
}
}
I want to know how to add components dynamically to a JDialog. I know there is a similar question on SO here, but as you can see, I have his solution as a part of my code.
So the idea is that on click of the button, I need to add a component on the dialog. The sample code is below:
import java.awt.Container;
import java.awt.Dialog;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class Test extends JFrame {
/**
*
*/
private static final long serialVersionUID = 1L;
public static void main(String args[]) {
Test test = new Test();
test.createDialog();
}
public void createDialog() {
DynamicDialog dialog = new DynamicDialog(this);
dialog.setSize(300, 300);
dialog.setVisible(true);
}
}
class DynamicDialog extends JDialog {
/**
*
*/
private static final long serialVersionUID = 1L;
public DynamicDialog(final JFrame owner) {
super(owner, "Dialog Title", Dialog.DEFAULT_MODALITY_TYPE);
final JPanel mainPanel = new JPanel();
mainPanel.setLayout(new BoxLayout(mainPanel, BoxLayout.Y_AXIS));
final JPanel panel = new JPanel();
panel.setLayout(new BoxLayout(panel, BoxLayout.X_AXIS));
panel.add(Box.createRigidArea(new Dimension(3, 10)));
panel.add(createLabel("Click on add"));
panel.add(Box.createRigidArea(new Dimension(23, 10)));
panel.add(createLabel("To add another line of text"));
panel.add(Box.createHorizontalGlue());
mainPanel.add(panel);
mainPanel.add(Box.createRigidArea(new Dimension(3, 10)));
JPanel buttonPanel = new JPanel();
buttonPanel.setLayout(new BoxLayout(buttonPanel, BoxLayout.Y_AXIS));
buttonPanel.add(Box.createHorizontalGlue());
JButton button = new JButton();
button.setText("Add another line");
buttonPanel.add(button);
mainPanel.add(buttonPanel);
mainPanel.add(Box.createRigidArea(new Dimension(3, 10)));
button.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent event) {
Container contentPane = owner.getContentPane();
JPanel _panel = new JPanel();
_panel.setLayout(new BoxLayout(_panel, BoxLayout.X_AXIS));
_panel.add(Box.createHorizontalGlue());
_panel.add(createLabel("Added!"));
contentPane.add(_panel);
contentPane.validate();
contentPane.repaint();
owner.pack();
}
});
pack();
setLocationRelativeTo(owner);
this.add(mainPanel);
}
JLabel createLabel(String name) {
JLabel label = new JLabel(name);
return label;
}
}
If you add it to the main panel it will work, you were adding it to the content pane of the frame which it seems it does not show up anywhere.
button.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent event) {
JPanel _panel = new JPanel();
_panel.setLayout(new BoxLayout(_panel, BoxLayout.X_AXIS));
_panel.add(Box.createHorizontalGlue());
_panel.add(createLabel("Added!"));
mainPanel.add(_panel);
mainPanel.validate();
mainPanel.repaint();
owner.pack();
}
})