Okay, so I'm learning to write and use layouts by hand instead of using the GUI Builder of Netbeans. I know my question may be simple for you but not so simple for someone new to this. My problem is that even if I set gbc.gridx=10 and /or gbc.gridy=2, it won't go further to right. It looks like it's only limiting it to position 1 or 2 but won't go further. Even the gridheight = 2 or any N won't take effect. What am I doing wrong here? Please help. Thanks in advance.
package gridbaglayoutsample;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.Border;
public class GridBagLayoutSample {
JFrame myFrame = new JFrame();
JPanel myPanel_1 = new JPanel(new GridBagLayout());
JButton myButton_1 = new JButton("Button 1");
JButton myButton_2 = new JButton("Button 2");
JButton myButton_3 = new JButton("Button 3");
public GridBagLayoutSample(){
GridBagConstraints gbc = new GridBagConstraints();
gbc.insets = new Insets(3,3,3,3); //insets are simple spacing for TOP LEFT BOTTOM RIGHT or PADDING
Border myLineBorder = BorderFactory.createLineBorder(Color.yellow,3);
myFrame.setLayout(new GridBagLayout());
myFrame.setPreferredSize(new Dimension(500, 500));
myFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
myFrame.setTitle("Grid Bag Layout Sample");
myFrame.setVisible(true);
myFrame.pack();
myFrame.setLocationRelativeTo(null);
myPanel_1.setBorder(myLineBorder);
gbc.gridx = 10; // set x position (STEP 1)
gbc.gridy = 0; //set y position (STEP 2)
myPanel_1.add(myButton_1,gbc); // after setting x and y, you can add (STEP 3)
gbc.gridx = 0;
gbc.gridy = 1;
gbc.gridheight = 2;
myPanel_1.add(myButton_2,gbc);
myFrame.add(myPanel_1);
}
public static void main(String[] args) {
new GridBagLayoutSample();
}
}
Related
I would like to create a panel, to which I can dynamically add sub-panels with fixed height. I tried using a glue component, but it does not work. I would like to achieve that the sub-panels are visible at the top of the gridbaglayout. Side problem is that when I keep adding sub-panels, they start to overlap because the JScrollPane isn't adjusting. However, when I resize the frame, both problems are solved.
At this moment I don't see where I went wrong. Why does the glue component not take up the vertical space to push the side panels to the top?
This is my SSCCE code:
import javax.swing.*;
import java.awt.GridBagLayout;
import java.awt.GridBagConstraints;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.awt.GridLayout;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.FlowLayout;
import javax.swing.border.EmptyBorder;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import jrdb.data.ProcessingCommand;
public class ProcessingPipelineBuilderSSCCE extends JFrame {
/**
*
*/
private static final long serialVersionUID = 2413084448601918744L;
private JPanel interiorPanel = null;
private GridBagConstraints gbc = null;
private Component glue = null;
public ProcessingPipelineBuilderSSCCE() {
super("SSCCE");
this.getContentPane().setLayout(new BorderLayout());
gbc = new GridBagConstraints();
gbc.insets = new Insets(5, 5, 0, 5);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridx = 0;
gbc.gridy = 0;
gbc.weightx = 1.0;
gbc.weighty = 1.0;
gbc.anchor = GridBagConstraints.PAGE_START;
JPanel pipelineBuilder = new JPanel();
pipelineBuilder.setLayout(new GridLayout(0, 1, 0, 0));
interiorPanel = new JPanel(new GridBagLayout());
interiorPanel.setBorder(BorderFactory.createLineBorder(Color.red));
JScrollPane scrollPane = new JScrollPane(interiorPanel);
scrollPane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
scrollPane.setPreferredSize(new Dimension(500,300));
pipelineBuilder.add(scrollPane);
JButton btnNew = new JButton("Add new panel");
btnNew.setPreferredSize(new Dimension(500, 30));
btnNew.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
if (glue!=null) {
interiorPanel.remove(glue);
} else {
glue = Box.createGlue();
}
gbc.gridy = gbc.gridy + 1;
interiorPanel.add(new PipelineStep(gbc.gridy),gbc);
interiorPanel.add(glue,gbc);
interiorPanel.validate();
interiorPanel.repaint();
}
});
this.getContentPane().add(btnNew, BorderLayout.PAGE_START);
this.getContentPane().add(pipelineBuilder,BorderLayout.CENTER);
}
public class PipelineStep extends JPanel {
int number;
public PipelineStep (int n) {
super();
JOptionPane.showMessageDialog(interiorPanel, "adding new panel");
this.number = n;
this.setLayout(new FlowLayout());
JLabel lbl = new JLabel(new Integer(this.number).toString());
lbl.setPreferredSize(new Dimension(45,45));
lbl.setFont(lbl.getFont().deriveFont(26));
this.add(lbl);
this.setPreferredSize(new Dimension(450, 50));
this.setBorder(BorderFactory.createLineBorder(Color.green));
}
}
public static void main (String args[]) {
ProcessingPipelineBuilderSSCCE frame = new ProcessingPipelineBuilderSSCCE();
frame.pack();
frame.setVisible(true);
}
}
Why does the glue component not take up the vertical space to push the side panels to the top?
The "glue" component only has meaning when used with the BoxLayout. It has no effect with the GridBagLayout.
So my suggestion is to forget about the GridBagLayout and use the BoxLayout.
The easiest way to do this is to convert "interiorPanel" to use a vertical Box and just add your PipelineStep instances to this panel.
Try this. However, you will notice that the panels will still increase in size until the scroll pane is full, at which time you will see scrollbars appear. This is because the BoxLayout will resize components up to the maximum size of the component. So to prevent this resizing you could override the getMaximumSize() method of your PipelineStep class:
#Override
public Dimension getMaximumSize()
{
return getPreferredSize();
}
Or, another option is to use a "wrapper" panel for your "interiorPanel". Something like:
JPanel wrapper = new JPanel( new BorderLayout() );
wrapper.add(interiorPanel, BorderLayout.PAGE_START);
//JScrollPane scrollPane = new JScrollPane(interiorPanel);
JScrollPane scrollPane = new JScrollPane(wrapper);
BorderLayout.PAGE_START respects the preferred height of the component added to it so the "interiorPanel" will always be displayed at it preferred height and scrollbars will appear when the viewport of the scroll pane is full.
I modified you code using the "wrapper" approach.
import javax.swing.*;
import java.awt.GridBagLayout;
import java.awt.GridBagConstraints;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.awt.GridLayout;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.FlowLayout;
import javax.swing.border.EmptyBorder;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
//import jrdb.data.ProcessingCommand;
public class SSCCE1 extends JFrame {
/**
*
*/
private static final long serialVersionUID = 2413084448601918744L;
// private JPanel interiorPanel = null;
private Box interiorPanel = null;
private GridBagConstraints gbc = null;
private Component glue = null;
public SSCCE1() {
super("SSCCE");
this.getContentPane().setLayout(new BorderLayout());
gbc = new GridBagConstraints();
//gbc.insets = new Insets(5, 5, 0, 5);
//gbc.fill = GridBagConstraints.HORIZONTAL;
//gbc.gridx = 0;
//gbc.gridy = 0;
//gbc.weightx = 1.0;
//gbc.weighty = 1.0;
//gbc.anchor = GridBagConstraints.PAGE_START;
JPanel pipelineBuilder = new JPanel();
pipelineBuilder.setLayout(new GridLayout(0, 1, 0, 0));
// interiorPanel = new JPanel(new GridBagLayout());
interiorPanel = Box.createVerticalBox();
interiorPanel.setBorder(BorderFactory.createLineBorder(Color.red));
JPanel wrapper = new JPanel( new BorderLayout() );
wrapper.add(interiorPanel, BorderLayout.PAGE_START);
// JScrollPane scrollPane = new JScrollPane(interiorPanel);
JScrollPane scrollPane = new JScrollPane(wrapper);
scrollPane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
scrollPane.setPreferredSize(new Dimension(500,300));
pipelineBuilder.add(scrollPane);
JButton btnNew = new JButton("Add new panel");
btnNew.setPreferredSize(new Dimension(500, 30));
btnNew.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
// if (glue!=null) {
// interiorPanel.remove(glue);
// } else {
// glue = Box.createGlue();
// }
gbc.gridy = gbc.gridy + 1;
// interiorPanel.add(new PipelineStep(gbc.gridy),gbc);
interiorPanel.add(new PipelineStep(gbc.gridy),gbc);
// interiorPanel.add(glue,gbc);
// interiorPanel.validate();
interiorPanel.revalidate();
interiorPanel.repaint();
}
});
this.getContentPane().add(btnNew, BorderLayout.PAGE_START);
this.getContentPane().add(pipelineBuilder,BorderLayout.CENTER);
}
public class PipelineStep extends JPanel {
int number;
public PipelineStep (int n) {
super();
JOptionPane.showMessageDialog(interiorPanel, "adding new panel");
this.number = n;
this.setLayout(new FlowLayout());
JLabel lbl = new JLabel(new Integer(this.number).toString());
lbl.setPreferredSize(new Dimension(45,45));
lbl.setFont(lbl.getFont().deriveFont(26));
this.add(lbl);
this.setPreferredSize(new Dimension(450, 50));
this.setBorder(BorderFactory.createLineBorder(Color.green));
}
}
public static void main (String args[]) {
SSCCE1 frame = new SSCCE1();
frame.pack();
frame.setVisible(true);
}
}
So after a day of studying layout managers and reading some swing refrences, this is what i come up with...
import java.awt.*;
import javax.swing.*;
public class Flags {
public static void startup() {
GridLayout Layout = new GridLayout(6,4);
JFrame menu = new JFrame("Flag Menu");
menu.setResizable(false);
menu.setSize(600,400);
JButton tailand = new JButton("Tailand");
JButton norway = new JButton("Norway");
JPanel panel = new JPanel();
panel.setLayout(Layout);
panel.add(norway);
panel.add(tailand);
menu.add(panel);
panel.setBackground(Color.LIGHT_GRAY);
tailand.setBackground(Color.WHITE);
norway.setBackground(Color.WHITE);
menu.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
menu.setLocationRelativeTo(null);
;
menu.setVisible(true);
}
}
The problem is that i want my buttons to start at the bottom left and be equally spaced between the 4 other buttons i want to make.
There's a number of ways you "might" achieve this and the solution will ultimately depend on what you are trying to achieve.
Personally, I'd start with GridBagLayout - while not the friendliness of layout managers, it is by far the most flexible.
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Flags {
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
new Flags().startup();
}
});
}
public static void startup() {
GridLayout Layout = new GridLayout(6, 4);
JFrame menu = new JFrame("Flag Menu");
// menu.setResizable(false);
// menu.setSize(600, 400);
menu.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JButton tailand = new JButton("Tailand");
JButton norway = new JButton("Norway");
JPanel panel = new JPanel(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.weighty = 1;
gbc.weightx = 1;
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridwidth = GridBagConstraints.REMAINDER;
gbc.anchor = GridBagConstraints.SOUTH;
panel.add(norway, gbc);
gbc.weighty = 0;
panel.add(tailand, gbc);
menu.add(panel);
panel.setBackground(Color.LIGHT_GRAY);
tailand.setBackground(Color.WHITE);
norway.setBackground(Color.WHITE);
menu.pack();
menu.setLocationRelativeTo(null);
menu.setVisible(true);
}
}
Another choice might be to use compound layouts, so that the "button" panel is placed at the SOUTH position of a BorderLayout and the "content" placed in the CENTER
Okay, so I need your help guys. I don't know what I missed but the insets and anchor is not taking effect even though I've set the layout to GridBag.
I need to put the logout button just above the tabbedpane and position the logout button on the upper right hand corner. In other words, tabbed pane on position gridx = 0, gridy = 1; and logout Button on position gridx = 0, gridy = 0;
Also, the myaccount button, leftpanel and rightpanel which are inside the home panel, won't get the insets i applied.
What am I missing. Please help because I'm new to this layout.
TopPanel.java
package MainComponents;
import java.awt.Color;
import javax.swing.BorderFactory;
import javax.swing.JPanel;
import javax.swing.border.Border;
import MainTab_TabbedPane.TopTabbedPane;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import javax.swing.JButton;
public class TopPanel extends JPanel {
//DECLARATION
JButton logOutButton = new JButton("Logout");
TopTabbedPane topTabbedPane = new TopTabbedPane();
private final Border myLineBorder = BorderFactory.createLineBorder(Color.BLACK, 2);
//CONSTRUCTOR
public TopPanel(){
setPanelInitialProperties();
addComponents();
}
//METHODS
private void setPanelInitialProperties(){
setLayout(new GridBagLayout());
setBorder(myLineBorder); //sets a Line Border for this panel
}
private void addComponents(){
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 1;
this.add(topTabbedPane); //adds TabbedPane holding Home, Administration... to this Top Panel
gbc.gridx = 0;
gbc.gridy = 0;
this.add(logOutButton);
}
}
HomeTopPanel.java
package HomeTab;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.border.Border;
public class HomeTopPanel extends JPanel {
private final JButton MyAccountButton = new JButton("My Account");
private final JPanel leftPanel = new JPanel(new GridBagLayout());
private final JPanel rightPanel = new JPanel(new GridBagLayout());
private final Border leftPanelLineBorder = BorderFactory.createLineBorder(Color.BLACK, 2);
private final Border rightPanelLineBorder = BorderFactory.createLineBorder(Color.BLACK, 2);
//CONSTRUCTOR
public HomeTopPanel(){
constructMyAccountButton();
constructPanels();
setLeftRightPanelBorders();
this.setLayout(new GridBagLayout());
}
private void constructMyAccountButton(){
GridBagConstraints MyAccountButton_gbc = new GridBagConstraints();
MyAccountButton_gbc.gridx = 0; MyAccountButton_gbc.gridy = 0;
MyAccountButton_gbc.anchor = GridBagConstraints.NORTHWEST;
this.add(MyAccountButton);
}
private void constructPanels(){
GridBagConstraints leftPanelgbc = new GridBagConstraints();
GridBagConstraints rightPanelgbc = new GridBagConstraints();
leftPanelgbc.insets = new Insets(3,3,3,3);
leftPanelgbc.gridx = 1; leftPanelgbc.gridy = 0;
leftPanel.setPreferredSize(new Dimension(300, 500));
this.add(leftPanel);
rightPanelgbc.insets = new Insets(3,3,3,3);
rightPanelgbc.gridx = 2; leftPanelgbc.gridy = 0;
rightPanel.setPreferredSize(new Dimension(300, 500));
this.add(rightPanel);
}
private void setLeftRightPanelBorders(){
leftPanel.setBorder(leftPanelLineBorder);
rightPanel.setBorder(rightPanelLineBorder);
this.setBorder(leftPanelLineBorder);
}
}
Thanks in advanced. I'm sure there's something I missed but I don't know.
INSETS won't apply. =( ??
UPDATE:
I added the insets with the following code:
private void constructPanels(){
GridBagConstraints gbc2 = new GridBagConstraints();
gbc2.gridx = 1; gbc2.gridy = 0;
gbc2.insets = new Insets(5, 5, 5, 5);
leftPanel.setPreferredSize(new Dimension(250, 300));
this.add(leftPanel,gbc2);
gbc2.gridx = 2; gbc2.gridy = 0;
gbc2.insets = new Insets(5, 5, 5, 5);
rightPanel.setPreferredSize(new Dimension(300, 500));
this.add(rightPanel,gbc2);
}
but still not getting any inset of 5.
Apply the constraints when adding components
add(topTabbedPane, gbc);
GridBagConstraints MyAccountButton_gbc = new GridBagConstraints();
Variable names should NOT start with an upper case character. Most of your other names are correct. Then is no reason to be sloppy. Follow the Java conventions.
constructMyAccountButton();
constructPanels();
setLeftRightPanelBorders();
this.setLayout(new GridBagLayout());
The layout must be set BEFORE you add components to the panel.
GridBagConstraints MyAccountButton_gbc = new GridBagConstraints();
MyAccountButton_gbc.gridx = 0; MyAccountButton_gbc.gridy = 0;
MyAccountButton_gbc.anchor = GridBagConstraints.NORTHWEST;
//this.add(MyAccountButton); // where is the constraint?
this.add(MyAccountButton, myAccountButton_gbc);
You actually have to use the constraint.
I've been trying to learn by Youtube videos, but there must be something I missing about GridBagLayout.
Basically what I expect is 4 buttons, one below another, with an height of 2 grids, but it seems that no matter what value I set gridheight, the buttons stay the same size
Compilable code :
package test;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.JFrame;
public class Test{
public static void main(String []args){
System.out.println("Hello World");
JFrame jay = new JFrame("test");
JPanel jp = new JPanel(new GridBagLayout());
GridBagConstraints gc = new GridBagConstraints();
JButton j1 = new JButton("Button 1");
JButton j2 = new JButton("Button 22222222222222");
JButton j3 = new JButton("Button 333333");
JButton j4 = new JButton("4");
gc.gridx = 0; gc.gridy = 0;
gc.insets = new Insets(5,10,5,10);
gc.gridheight = 2; //This is where the problem is;
gc.fill = GridBagConstraints.BOTH;
jp.add(j1,gc);
gc.gridx = 0; gc.gridy = 2;
jp.add(j2,gc);
gc.gridx = 0; gc.gridy = 4;
jp.add(j3,gc);
gc.gridx = 0; gc.gridy = 6;
jp.add(j4,gc);
jay.add(jp);
jay.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jay.setSize(300,350);
jay.setVisible(true);
}
}
Also if someone explain me what determines the size of the grids? is it just the component size?
gridheight specifies the number of rows that a component will expand, assuming that there are components in those rows (any empty row will automatically be sized to 0)
how would I go about achieving taller buttons then? adding blank components?
One possible solution is to use ipady which is added to the component's preferredSize property (you can also use ipadx for width)
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class Test {
public static void main(String[] args) {
new Test();
}
public Test() {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
public TestPane() {
setLayout(new GridBagLayout());
GridBagConstraints gc = new GridBagConstraints();
JButton j1 = new JButton("Button 1");
JButton j2 = new JButton("Button 22222222222222");
JButton j3 = new JButton("Button 333333");
JButton j4 = new JButton("4");
gc.insets = new Insets(5, 10, 5, 10);
gc.ipady = 50;
gc.gridwidth = GridBagConstraints.REMAINDER;
gc.fill = GridBagConstraints.BOTH;
add(j1, gc);
add(j2, gc);
add(j3, gc);
add(j4, gc);
}
}
}
Have a look at How to Use GridBagLayout for more details
I am making an application for which I am using a BoxLayout. As you can see in the following picture, when the title string is short, it's perfect. But as the string gets longer, the JLabel gets more and more misaligned.
Here's some code that is related to the problem:
JPanel centerPanel = new JPanel();
centerPanel.setLayout(new BoxLayout(centerPanel, BoxLayout.PAGE_AXIS));
frame.add(centerPanel, BorderLayout.CENTER);
//...
JLabel l = new JLabel(/*...*/);
l.setHorizontalAlignment(SwingConstants.CENTER); //I tried removing and adding
//this but nothing changed
centerPanel.add(l);
Is there something obvious I am missing? Google isn't being helpful with this problem.
In case it's important, the country-label-progress-bar things are just JPanels with FlowLayouts.
SSCCE:
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
public class SSCCE {
public static void main(String[] args) {
final JFrame f = new JFrame("SSCCE");
JPanel p = new JPanel();
p.setLayout(new BoxLayout(p, BoxLayout.PAGE_AXIS));
final JLabel[] titles = new JLabel[5];
JPanel[] smallPanels = new JPanel[titles.length];
for (int i = 0; i < smallPanels.length; i ++) {
titles[i] = new JLabel(Math.random() < 0.5 ? "foo" : "bar");
p.add(titles[i]);
smallPanels[i] = new JPanel();
smallPanels[i].add(new JLabel("foobar"));
smallPanels[i].add(new JProgressBar());
p.add(smallPanels[i]);
}
f.add(p, BorderLayout.CENTER);
final JTextField tf = new JTextField("foobar");
tf.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
titles[2].setText(tf.getText());
f.repaint();
}
});
f.add(tf, BorderLayout.NORTH);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setSize(600, 600);
f.setVisible(true);
}
}
To operate the SSCCE, type something in the text field and press enter.
Here is an updated version of your SSCCE with a GridBagLayout. Not sure of how you want components to resize when labels or frame size changes but it should not be too hard to manage this.
import java.awt.BorderLayout;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Random;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JProgressBar;
import javax.swing.JTextField;
public class SSCCE {
public static void main(String[] args) {
final JFrame f = new JFrame("SSCCE");
JPanel p = new JPanel();
p.setLayout(new GridBagLayout());
Insets insets = new Insets(3, 3, 3, 3);
GridBagConstraints gbc1 = new GridBagConstraints();
gbc1.gridwidth = GridBagConstraints.REMAINDER;
gbc1.anchor = GridBagConstraints.CENTER;
gbc1.insets = insets;
GridBagConstraints gbc2 = new GridBagConstraints();
gbc2.anchor = GridBagConstraints.EAST;
gbc2.insets = insets;
GridBagConstraints gbc3 = new GridBagConstraints();
gbc3.weightx = 1.0;
gbc3.fill = GridBagConstraints.HORIZONTAL;
gbc3.gridwidth = GridBagConstraints.REMAINDER;
gbc3.insets = insets;
final JLabel[] titles = new JLabel[5];
Random random = new Random();
for (int i = 0; i < titles.length; i++) {
titles[i] = new JLabel(Math.random() < 0.5 ? "foo" : "bar");
p.add(titles[i], gbc1);
p.add(new JLabel("foobar"), gbc2);
JProgressBar progress = new JProgressBar();
progress.setStringPainted(true);
progress.setString(String.valueOf(random.nextInt(100)));
p.add(progress, gbc3);
}
f.add(p, BorderLayout.CENTER);
final JTextField tf = new JTextField("foobar");
tf.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
titles[2].setText(tf.getText());
f.repaint();
}
});
f.add(tf, BorderLayout.NORTH);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.pack();
f.setVisible(true);
}
}
BoxLayout accepting Min, Max and PreferredSize, childs could be resizable from Min to MaxSize
FlowLayout accepting only PreferredSize, rest (Min, MaxSize) is ignored by this LayoutManager, childs aren't resizable
these XxxSize are calculated from PreferredSize came from childs placed into container (JPanel in this case)
(your question) for better help sooner post an SSCCE, short, runnable, compilable, just about your issue