I have this layout using GridBagLayout:
public class Example extends JFrame {
public Example() {
Border outline = BorderFactory.createLineBorder(Color.black);
GridBagLayout gbl = new GridBagLayout();
GridBagConstraints gbc = new GridBagConstraints();
JPanel pane = new JPanel(gbl);
gbc.weighty = 1.0;
gbc.weightx = 1.0;
JLabel unitLbl = new JLabel("Unit");
unitLbl.setBorder(outline);
gbc.gridx = 0;
gbc.gridy = 0;
gbc.ipadx = 30;
gbc.ipady = 10;
gbl.setConstraints(unitLbl, gbc);
pane.add(unitLbl);
JLabel typeLbl = new JLabel("Type");
typeLbl.setBorder(outline);
gbc.gridx = 0;
gbc.gridy = 1;
gbc.ipadx = 30;
gbc.ipady = 10;
gbl.setConstraints(typeLbl, gbc);
pane.add(typeLbl);
JTextField unitField = new JTextField();
typeLbl.setBorder(outline);
gbc.gridx = 1;
gbc.gridy = 0;
gbc.ipadx = 30;
gbc.ipady = 10;
gbl.setConstraints(unitField, gbc);
pane.add(unitField);
String[] type = {"All", "Verb", "Noun", "Adjective"};
JComboBox<String> comboBox = new JComboBox<String>(type);
gbc.gridx = 1;
gbc.gridy = 1;
gbc.ipadx = 30;
gbc.ipady = 10;
gbl.setConstraints(comboBox, gbc);
pane.add(comboBox);
add(pane, BorderLayout.CENTER);
setSize(new Dimension(400, 300));
getContentPane().setBackground(Color.WHITE);
setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
new Example();
}
});
}
}
In this example, when run, It seems that every component is at the center of the frame. But what I want is :
Two JLabel (unitLbl and typelbl) will be on the left of frame
JTextField and JComboBox will be on the right of two JLabel, respectively with a small distance between.
Moreover, I want to add a new JButton at location (3,0) of the grid, but the height of this location sum of two JLabel height. It means, this button height is on "two line".
How can I fix this code to achieve this goal ? Please help me.
Thanks :)
Something like this should do the trick:
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
public class Example extends JFrame {
public Example() {
GridBagLayout gbl = new GridBagLayout();
GridBagConstraints gbc = new GridBagConstraints();
JPanel pane = new JPanel(gbl);
gbc.anchor = GridBagConstraints.WEST;
JLabel unitLbl = new JLabel("Unit");
gbc.gridx = 0;
gbc.gridy = 0;
gbc.insets = new Insets(3, 3, 3, 30);
gbl.setConstraints(unitLbl, gbc);
pane.add(unitLbl);
JLabel typeLbl = new JLabel("Type");
gbc.gridx = 0;
gbc.gridy = 1;
gbl.setConstraints(typeLbl, gbc);
pane.add(typeLbl);
gbc.weightx = 1.0;
gbc.insets = new Insets(3, 3, 3, 3);
JTextField unitField = new JTextField();
gbc.gridx = 1;
gbc.gridy = 0;
gbc.fill = GridBagConstraints.BOTH;
gbl.setConstraints(unitField, gbc);
pane.add(unitField);
String[] type = { "All", "Verb", "Noun", "Adjective" };
JComboBox<String> comboBox = new JComboBox<String>(type);
gbc.gridx = 1;
gbc.gridy = 1;
gbc.fill = GridBagConstraints.NONE;
gbl.setConstraints(comboBox, gbc);
pane.add(comboBox);
final JButton someButton = new JButton("Click me");
someButton.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
JOptionPane.showMessageDialog(someButton, "You have clicked " + someButton.getText());
}
});
gbc.gridx = 3;
gbc.gridy = 0;
gbc.gridheight = 2;
gbc.fill = GridBagConstraints.VERTICAL;
pane.add(someButton, gbc);
add(pane, BorderLayout.CENTER);
setSize(new Dimension(400, 300));
getContentPane().setBackground(Color.WHITE);
setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
new Example();
}
});
}
}
You need to use appropriately weightx/weighty (how is the extra horizontal/vertical space redistributed)
Use the appropriate fill attribute (is the component stretched vertically/horizontally/both?)
Use the appropriate anchor attribute (if the component is not stretched, or at least not in both direction, where should it be located within its cell)
I usually prefer to use insets instead of padding, therefore, I prefer insets over ipadx/ipady (extra white-space should be added around the component or inside the component)
You want to use GridBagConsraints#anchor to define the position within the cell that you want to align the component to.
To allow a component to span over number of cells, you want to use GridBagConstraints#gridwidth and GridBagConstraints#gridheight (the default is 1)
public class TestLayout09 {
public static void main(String[] args) {
new TestLayout09();
}
public TestLayout09() {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException ex) {
} catch (InstantiationException ex) {
} catch (IllegalAccessException ex) {
} catch (UnsupportedLookAndFeelException ex) {
}
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(new LayoutPane());
frame.setBackground(Color.WHITE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class LayoutPane extends JPanel {
public LayoutPane() {
Border outline = BorderFactory.createLineBorder(Color.black);
setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
// I'm not sure this really is what you want, but I may be mistaken
// gbc.weighty = 1.0;
// gbc.weightx = 1.0;
JLabel unitLbl = new JLabel("Unit");
unitLbl.setBorder(outline);
gbc.gridx = 0;
gbc.gridy = 0;
gbc.ipadx = 30;
gbc.ipady = 10;
gbc.anchor = GridBagConstraints.WEST;
add(unitLbl, gbc);
JLabel typeLbl = new JLabel("Type");
typeLbl.setBorder(outline);
gbc.gridx = 0;
gbc.gridy = 1;
gbc.ipadx = 30;
gbc.ipady = 10;
add(typeLbl, gbc);
JTextField unitField = new JTextField();
typeLbl.setBorder(outline);
gbc.gridx = 1;
gbc.gridy = 0;
gbc.ipadx = 30;
gbc.ipady = 10;
gbc.anchor = GridBagConstraints.EAST;
add(unitField, gbc);
String[] type = {"All", "Verb", "Noun", "Adjective"};
JComboBox<String> comboBox = new JComboBox<String>(type);
gbc.gridx = 1;
gbc.gridy = 1;
gbc.ipadx = 30;
gbc.ipady = 10;
add(comboBox, gbc);
JButton btn = new JButton("Test");
gbc.gridx = 3;
gbc.gridy = 0;
gbc.fill = GridBagConstraints.BOTH;
gbc.gridheight = 2;
add(btn, gbc);
}
}
}
Some answers:
Put the anchor for unitlbl to WEST.
gbc.anchor = GridBagConstraints.WEST;
And the anchor for unitField to EAST.
gbc.anchor = GridBagConstraints.EAST;
And for the button:
JButton button = new JButton("Test");
gbc.fill = GridBagConstraints.VERTICAL;
gbc.gridx = 3;
gbc.gridy = 0;
gbc.gridwidth = 1;
gbc.gridheight = 2;
gbc.weighty = 1;
pane.add(button, gbc);
Related
I want to build this same frame in the image with Layout Manager
What I already did:
Used BorderLayout to add all three JLabel to BorderLayout.WEST(Used GridLayout(3,1).
Used BorderLayout to add all three JTextField to BorderLayout.CENTER(used GridLayout(3,1).
I build this frame by manually adding components using the setBounds method.
Here's my implementation of your screen capture.
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.WindowConstants;
public class SmplForm implements Runnable {
#Override // java.lang.Runnable
public void run() {
createAndDisplayGui();
}
private void createAndDisplayGui() {
JFrame frame = new JFrame("Nonce creator");
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
frame.add(createForm(), BorderLayout.CENTER);
frame.add(createButtonsPanel(), BorderLayout.PAGE_END);
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
private JPanel createButtonsPanel() {
JPanel buttonsPanel = new JPanel();
JButton proceedButton = new JButton("Proceed");
buttonsPanel.add(proceedButton);
return buttonsPanel;
}
private JPanel createForm() {
JPanel form = new JPanel(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.anchor = GridBagConstraints.LINE_START;
gbc.gridx = 0;
gbc.gridy = 0;
gbc.insets.bottom = 5;
gbc.insets.left = 5;
gbc.insets.right = 5;
gbc.insets.top = 5;
JLabel transactionLabel = new JLabel("Transaction");
form.add(transactionLabel, gbc);
gbc.gridx = 1;
JTextField transactionTextField = new JTextField(20);
form.add(transactionTextField, gbc);
gbc.gridx = 0;
gbc.gridy = 1;
JLabel nonceLabel = new JLabel("Nonce");
form.add(nonceLabel, gbc);
gbc.gridx = 1;
JTextField nonceTextField = new JTextField(20);
form.add(nonceTextField, gbc);
gbc.gridx = 2;
JCheckBox autoCheckBox = new JCheckBox("Auto");
form.add(autoCheckBox, gbc);
gbc.gridx = 0;
gbc.gridy = 2;
JLabel hashLabel = new JLabel("Hash");
form.add(hashLabel, gbc);
gbc.gridx = 1;
JTextField hashTextField = new JTextField(20);
hashTextField.setText("8350e5a3e24c153df2275c9f80692773");
hashTextField.setEnabled(false);
form.add(hashTextField, gbc);
return form;
}
public static void main(String[] args) {
EventQueue.invokeLater(new SmplForm());
}
}
This GUI has three slight tweaks, the first two as seen in the example by Abra:
The button is center aligned.
The label for the check box is to the right of the check.
The labels are right aligned.
import java.awt.*;
import javax.swing.*;
import javax.swing.border.EmptyBorder;
public class NonceCreator {
private JComponent ui = null;
NonceCreator() {
initUI();
}
public void initUI() {
if (ui!=null) return;
ui = new JPanel(new GridBagLayout());
ui.setBorder(new EmptyBorder(20,30,20,30));
GridBagConstraints gbc = new GridBagConstraints();
gbc.insets = new Insets(5,5,5,5);
// add the labels
gbc.anchor = GridBagConstraints.EAST;
ui.add(new JLabel("Transaction"), gbc);
gbc.gridy = 1;
ui.add(new JLabel("Nonce"), gbc);
gbc.gridy = 2;
ui.add(new JLabel("Hash"), gbc);
gbc.anchor = GridBagConstraints.WEST;
// add the text fields
gbc.gridx = 1;
gbc.gridy = 0;
gbc.gridwidth = 2;
ui.add(new JTextField(30), gbc);
gbc.gridy = 2;
JTextField hashField = new JTextField(
"8350e5a3e24c153df2275c9f80692773", 30);
hashField.setEditable(false);
ui.add(hashField, gbc);
gbc.gridy = 1;
gbc.gridwidth = 1;
ui.add(new JTextField(20), gbc);
// add the check box
gbc.gridx = 2;
ui.add(new JCheckBox("Auto"), gbc);
// add the button
gbc.gridx = 0;
gbc.gridy = 3;
gbc.gridwidth = 3;
gbc.anchor = GridBagConstraints.CENTER;
ui.add(new JButton("Proceed"), gbc);
}
public JComponent getUI() {
return ui;
}
public static void main(String[] args) {
Runnable r = new Runnable() {
#Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception useDefault) {
}
NonceCreator o = new NonceCreator();
JFrame f = new JFrame(o.getClass().getSimpleName());
f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
f.setLocationByPlatform(true);
f.setContentPane(o.getUI());
f.pack();
f.setMinimumSize(f.getSize());
f.setVisible(true);
}
};
SwingUtilities.invokeLater(r);
}
}
I don't use a visual GUI Builder. I think you can use GroupLayout or GridBagLayout for a flexible design. Also you can use a design tool like Adobe XD, and convert this to Java. That will be easier.
Look at;
https://docs.oracle.com/javase/tutorial/uiswing/layout/group.html
https://docs.oracle.com/javase/tutorial/uiswing/layout/gridbag.html
I want to create a simple food ordering system, now i'm creating the interface of an order form. I used GridBagLayout for create the form layout, my problem is when I want to assign 3 radio button in same row, it's only show me 1 of the button....I hope somebody can help me pls....
Here is my java code:
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.*;
/**
*
* #author user
*/
public class ChickenChopOrderingSystem
{
JFrame frame;
JPanel mainPanel, p1, p2, p3, p4;
JLabel lblTitle, lblName, lblPhoneNum, lblFlavour, lblChickenPart;
JTextField txtName, txtPhoneNum;
String flavour[] = {"Black Pepper Sauce", "Hainanese", "Grilled", "Lemon"};
JComboBox box;
ButtonGroup bg = new ButtonGroup();
JRadioButton btnWhole, btnHalf, btnQuarter;
JButton btnDone, btnExit;
public ChickenChopOrderingSystem()
{
frame = new JFrame("Chicken Chop Ordering System");
mainPanel = new JPanel();
mainPanel.setPreferredSize(new Dimension(700,700));
mainPanel.setBackground(Color.yellow);
lblName = new JLabel("Customer's Name: ");
txtName = new JTextField(20);
lblPhoneNum = new JLabel("Phone Number: ");
txtPhoneNum = new JTextField(11);
lblChickenPart = new JLabel("Select Part of Chicken: ");
btnWhole = new JRadioButton("Whole");
btnWhole.addItemListener(new OperationListener());
btnHalf = new JRadioButton("Half");
btnHalf.addItemListener(new OperationListener());
btnQuarter = new JRadioButton("Quarter");
btnQuarter.addItemListener(new OperationListener());
bg.add(btnWhole);
bg.add(btnHalf);
bg.add(btnQuarter);
lblFlavour = new JLabel("Select a flavour: ");
box = new JComboBox(flavour);
btnDone = new JButton("Done");
btnExit = new JButton("Exit");
btnExit.addActionListener(new ButtonListener());
//GridBaglayout
mainPanel.setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
//Label
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridx = 0;
gbc.gridy = 0;
gbc.weightx = 0.5;
gbc.weighty = 0.5;
mainPanel.add(lblName, gbc);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridx = 0;
gbc.gridy = 1;
gbc.weightx = 0.5;
mainPanel.add(lblPhoneNum, gbc);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridx = 0;
gbc.gridy = 2;
gbc.weightx = 0.5;
mainPanel.add(lblChickenPart, gbc);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridx = 0;
gbc.gridy = 3;
gbc.weightx = 0.5;
mainPanel.add(lblFlavour, gbc);
//TextField
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridx = 1;
gbc.gridy = 0;
gbc.gridwidth = 3;
mainPanel.add(txtName, gbc);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridx = 1;
gbc.gridy = 1;
gbc.gridwidth = 3;
mainPanel.add(txtPhoneNum, gbc);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridx = 1;
gbc.gridy = 2;
mainPanel.add(btnWhole, gbc);
gbc.gridx = 2;
gbc.gridy = 2;
mainPanel.add(btnHalf, gbc);
gbc.gridx = 3;
gbc.gridy = 2;
mainPanel.add(btnHalf, gbc);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridx = 1;
gbc.gridy = 3;
mainPanel.add(box, gbc);
//frame setting
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new GridBagLayout());
frame.add(mainPanel, new GridBagConstraints());
frame.setSize(new Dimension(1000, 1000));
frame.setVisible(true);
}
public class OperationListener implements ItemListener
{
#Override
public void itemStateChanged(ItemEvent ie) {
if (ie.getSource() == btnWhole)
{
if (ie.getStateChange() == ItemEvent.SELECTED)
{
box.removeAllItems();
box.addItem(flavour[2]);
}
} if (ie.getSource() == btnHalf)
{
if (ie.getStateChange() == ItemEvent.SELECTED)
{
box.removeAllItems();
box.addItem(flavour[0]);
box.addItem(flavour[2]);
box.addItem(flavour[3]);
}
} if (ie.getSource() == btnQuarter)
{
if (ie.getStateChange() == ItemEvent.SELECTED)
{
box.removeAllItems();
box.addItem(flavour[0]);
box.addItem(flavour[1]);
box.addItem(flavour[3]);
}
}
}
}
public class ButtonListener implements ActionListener
{
#Override
public void actionPerformed(ActionEvent ae) {
if (ae.getSource() == btnExit)
{
int s = JOptionPane.showConfirmDialog(null, "Are you sure you want to exit?",
"Exit", JOptionPane.YES_NO_OPTION);
if (s == JOptionPane.YES_OPTION)
{
System.exit(0);
}
}
}
}
public static void main(String[] args)
{
ChickenChopOrderingSystem run = new ChickenChopOrderingSystem();
}
}
Click here to view output
For something like this:
Use this code:
import java.awt.*;
import javax.swing.*;
public class ChickenChopOrderingSystem {
JFrame frame;
JPanel mainPanel, p1, p2, p3, p4;
JLabel lblTitle, lblName, lblPhoneNum, lblFlavour, lblChickenPart;
JTextField txtName, txtPhoneNum;
String flavour[] = {"Black Pepper Sauce", "Hainanese", "Grilled", "Lemon"};
JComboBox box;
ButtonGroup bg = new ButtonGroup();
JRadioButton btnWhole, btnHalf, btnQuarter;
JButton btnDone, btnExit;
public ChickenChopOrderingSystem() {
frame = new JFrame("Chicken Chop Ordering System");
mainPanel = new JPanel();
// GUESSWORK!
//mainPanel.setPreferredSize(new Dimension(700,700));
mainPanel.setBackground(Color.yellow);
lblName = new JLabel("Customer's Name: ");
txtName = new JTextField(20);
lblPhoneNum = new JLabel("Phone Number: ");
txtPhoneNum = new JTextField(11);
lblChickenPart = new JLabel("Select Part of Chicken: ");
btnWhole = new JRadioButton("Whole");
btnHalf = new JRadioButton("Half");
btnQuarter = new JRadioButton("Quarter");
bg.add(btnWhole);
bg.add(btnHalf);
bg.add(btnQuarter);
lblFlavour = new JLabel("Select a flavour: ");
box = new JComboBox(flavour);
btnDone = new JButton("Done");
btnExit = new JButton("Exit");
//GridBaglayout
mainPanel.setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
int s = 20;
gbc.insets = new Insets(s,s,s,s);
//Label
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridx = 0;
gbc.gridy = 0;
gbc.weightx = 0.5;
gbc.weighty = 0.5;
mainPanel.add(lblName, gbc);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridx = 0;
gbc.gridy = 1;
gbc.weightx = 0.5;
mainPanel.add(lblPhoneNum, gbc);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridx = 0;
gbc.gridy = 2;
gbc.weightx = 0.5;
mainPanel.add(lblChickenPart, gbc);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridx = 0;
gbc.gridy = 3;
gbc.weightx = 0.5;
mainPanel.add(lblFlavour, gbc);
//TextField
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridx = 1;
gbc.gridy = 0;
gbc.gridwidth = 3;
mainPanel.add(txtName, gbc);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridx = 1;
gbc.gridy = 1;
gbc.gridwidth = 3;
mainPanel.add(txtPhoneNum, gbc);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridx = 1;
gbc.gridy = 2;
gbc.gridwidth = 1;
gbc.weightx = 1d/6d;
mainPanel.add(btnWhole, gbc);
gbc.gridx = 2;
gbc.gridy = 2;
mainPanel.add(btnHalf, gbc);
gbc.gridx = 3;
gbc.gridy = 2;
mainPanel.add(btnQuarter, gbc);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridx = 1;
gbc.gridy = 3;
gbc.gridwidth = 3;
mainPanel.add(box, gbc);
//frame setting
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new GridBagLayout());
frame.add(mainPanel, new GridBagConstraints());
// GUESSWORK!
//frame.setSize(new Dimension(1000, 1000));
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
ChickenChopOrderingSystem run = new ChickenChopOrderingSystem();
}
}
The problems in the original code were many. (Trawling memory..)
The constraints of the last element were not set back to grid width of 3, confusing the layout manager.
The ItemListener was doing strange stuff with removing components, don't do that.
The preferred size of the panel, and the size of the frame, were guesswork. Use pack() to have the correct size calculated. (Add a standard Inserts to the initial constraints for white space.)
Trying to align a form next to my JTable with GridBagLayout and I am struggling to get my components to the top of the panel. I need the price label and fields just underneath the item label and field but I cannot get it to move from the bottom of the panel.
If I use anchor = GridConstraints.NORTHWEST, this moves the item label and field to the top, but then I lose the ability to anchor it with LINE_END. Unless there is a way to do both? Please see my image where I have attempted to demonstrate the area I want to place my form. Appreciate any help.
GridBagConstraints gbc = new GridBagConstraints();
// TEST COMPONENTS
JLabel lblItem = new JLabel("Item: ");
JLabel lblPrice = new JLabel("Price: ");
JLabel lblQuantity = new JLabel ("Quantity: ");
JTextField itemField = new JTextField(15);
JTextField pricePoundsField = new JTextField(3);
JTextField pricePenceField = new JTextField(2);
JTextField quantityField = new JTextField(3);
gbc.gridx = 0;
gbc.gridy = 0;
//gbc.weightx = 1.0;
//gbc.weighty = 1.0;
gbc.anchor = GridBagConstraints.LINE_START;
panelStockTable.add(jsp, gbc);
gbc.gridx = 1;
gbc.gridy = 0;
gbc.anchor = GridBagConstraints.LINE_END;
panelStockTable.add(lblItem, gbc);
gbc.gridx = 1;
gbc.gridy = 1;
panelStockTable.add(lblPrice, gbc);
gbc.anchor = GridBagConstraints.LINE_START;
gbc.gridx = 2;
gbc.gridy = 0;
panelStockTable.add(itemField, gbc);
gbc.gridx = 2;
gbc.gridy = 1;
panelStockTable.add(pricePoundsField, gbc);
The more complex a UI becomes, the more you want to focus on isolating the functionality and layouts to their own containers/classes.
This is where the concept of compounding layouts becomes very powerful. Rather then laying the fields out directly onto the same container as the table, use a separate container for them
Here, the right panel is standing in for the table and the blue panel is demonstrating the compounding container...
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
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 gbc = new GridBagConstraints();
JPanel stockTableProxy = new JPanel() {
#Override
public Dimension getPreferredSize() {
return new Dimension(200, 150);
}
};
stockTableProxy.setBackground(Color.RED);
gbc.gridx = 0;
gbc.gridy = 0;
gbc.weightx = 1.0;
gbc.weighty = 1.0;
gbc.fill = GridBagConstraints.BOTH;
gbc.anchor = GridBagConstraints.LINE_START;
add(stockTableProxy, gbc);
JPanel fieldsPanel = new JPanel(new GridBagLayout());
fieldsPanel.setBackground(Color.BLUE);
// TEST COMPONENTS
JLabel lblItem = new JLabel("Item: ");
JLabel lblPrice = new JLabel("Price: ");
JLabel lblQuantity = new JLabel("Quantity: ");
JTextField itemField = new JTextField(15);
JTextField pricePoundsField = new JTextField(3);
JTextField pricePenceField = new JTextField(2);
JTextField quantityField = new JTextField(3);
gbc = new GridBagConstraints();
gbc.gridx = 1;
gbc.gridy = 0;
gbc.anchor = GridBagConstraints.LINE_END;
fieldsPanel.add(lblItem, gbc);
gbc.gridx = 1;
gbc.gridy = 1;
fieldsPanel.add(lblPrice, gbc);
gbc.anchor = GridBagConstraints.LINE_START;
gbc.gridx = 2;
gbc.gridy = 0;
fieldsPanel.add(itemField, gbc);
gbc.gridx = 2;
gbc.gridy = 1;
fieldsPanel.add(pricePoundsField, gbc);
gbc.gridx = 0;
gbc.gridy = 20;
gbc.gridwidth = GridBagConstraints.REMAINDER;
gbc.weighty = 1;
fieldsPanel.add(new JLabel(), gbc);
gbc = new GridBagConstraints();
gbc.gridx = 1;
gbc.gridy = 0;
gbc.anchor = GridBagConstraints.LINE_END;
gbc.fill = GridBagConstraints.VERTICAL;
add(fieldsPanel, gbc);
}
}
}
But wait, there is more...
gbc.gridx = 0;
gbc.gridy = 20;
gbc.gridwidth = GridBagConstraints.REMAINDER;
gbc.weighty = 1;
fieldsPanel.add(new JLabel(), gbc);
This is a little trick you can use to force component to move to different edges of the container, here, I've used it to push all the fields to the top of the container.
All it does is add a transparent component (in this a JLabel) and provides all the left over space to it, neat
I have a problem with GridbagLayout; I've 5 buttons and I want to have them in this way:
I've already tried different approaches but no one works in the correct way.
For example:
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import javax.swing.Box;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class TestGridBagLayout {
protected void initUI() {
JFrame frame = new JFrame("Test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel southPanel = new JPanel(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridwidth = 2;
gbc.gridy = 0;
JButton enterRoom = new JButton("Enter room");
JButton exitRoom = new JButton("Exit room");
JButton login = new JButton("Login");
JButton logout = new JButton("Logout");
JButton whoIsIn = new JButton("Who is in");
gbc.gridx = 1;
southPanel.add(enterRoom, gbc);
gbc.gridx = 5;
southPanel.add(exitRoom, gbc);
gbc.gridy = 1;
gbc.gridx = 0;
southPanel.add(login, gbc);
gbc.gridx = 3;
southPanel.add(logout, gbc);
gbc.gridx = 6;
southPanel.add(whoIsIn, gbc);
frame.add(southPanel);
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException,
UnsupportedLookAndFeelException {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
new TestGridBagLayout().initUI();
}
});
}
}
Appears:
I'm not interested in other approaches (such as GridLayout), I'd like to know what I'm missing.
GridBagLayout can be a strange animal in some cases. But anyway, gridwidth is something that works, only if there is an actual component that requires some width within the "spanned" column (for example, if you say gridx=0 and gridwidth=2, column 0 has a component and the "spanned" column is column 1).
In your case, column 2, 4 & 7 have no components, so their width is set to 0. Additionnaly, column 5 also gets a width of 0, because column 6 provides enough witdth to the exit room button, so in the end you get the result you see.
Now, not sure of the kind of layout you are trying to achieve (I saw your screenshot, but how should it behave when the panel collapses/expands in width?). So find below, an example that comes a bit closer to what you describe (although I don't find it very nice)
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class TestGridBagLayout2 {
protected void initUI() {
JFrame frame = new JFrame("Test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel southPanel = new JPanel(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridy = 0;
JButton enterRoom = new JButton("Enter room");
JButton exitRoom = new JButton("Exit room");
JButton login = new JButton("Login");
JButton logout = new JButton("Logout");
JButton whoIsIn = new JButton("Who is in");
gbc.gridx = 0;
gbc.weightx = 1.0;
gbc.anchor = GridBagConstraints.EAST;
southPanel.add(enterRoom, gbc);
gbc.anchor = GridBagConstraints.WEST;
gbc.gridx = 2;
southPanel.add(exitRoom, gbc);
gbc.gridy = 1;
gbc.gridx = 0;
southPanel.add(login, gbc);
gbc.weightx = 0;
gbc.gridx = 1;
southPanel.add(logout, gbc);
gbc.weightx = 1.0;
gbc.anchor = GridBagConstraints.EAST;
gbc.gridx = 2;
southPanel.add(whoIsIn, gbc);
frame.add(southPanel);
frame.pack();
frame.setSize(frame.getWidth() * 4 / 3, frame.getHeight());
frame.setMinimumSize(frame.getSize());
frame.setVisible(true);
}
public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException,
UnsupportedLookAndFeelException {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
new TestGridBagLayout().initUI();
}
});
}
}
GridbagLayout seems to require a row where a component occupies all of the columns in the row. See: Why does this GridBagLayout not appear as planned? for the basis of this solution.
Note the that horizontal strut size was choosen to be half the size of the "Logout" button so that two cells with span the width of the logout button to give the centering of components that you desire.
import java.awt.*;
import javax.swing.*;
public class SSCCE extends JPanel
{
public SSCCE()
{
JButton enterRoom = new JButton("Enter room");
JButton exitRoom = new JButton("Exit room");
JButton login = new JButton("Login");
JButton logout = new JButton("Logout");
JButton whoIsIn = new JButton("Who is in");
setLayout( new GridBagLayout() );
GridBagConstraints gbc = new GridBagConstraints();
gbc.insets = new Insets(5, 0,5, 0);
gbc.gridwidth = 2;
gbc.gridx = 1;
gbc.gridy = 0;
add(enterRoom, gbc);
gbc.gridx = 5;
gbc.gridy = 0;
add(exitRoom, gbc);
gbc.gridx = 0;
gbc.gridy = 1;
add(login, gbc);
gbc.gridx = 3;
gbc.gridy = 1;
add(logout, gbc);
gbc.gridx = 6;
gbc.gridy = 1;
add(whoIsIn, gbc);
// Add dummy components so every cell has a component.
gbc.insets = new Insets(0, 0, 0, 0);
gbc.gridwidth = 1;
gbc.gridy = 2;
int strutWidth = logout.getPreferredSize().width / 2;
for (int i = 0; i < 8; i++)
{
gbc.gridx = i;
add(Box.createHorizontalStrut(strutWidth), gbc);
}
}
private static void createAndShowGUI()
{
JFrame frame = new JFrame("SSCCE");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new SSCCE(), BorderLayout.NORTH);
frame.setLocationByPlatform( true );
frame.pack();
frame.setVisible( true );
}
public static void main(String[] args)
{
EventQueue.invokeLater(new Runnable()
{
public void run()
{
createAndShowGUI();
}
});
}
}
I am trying to make an UI with Swing using only one Container with the GridBagLayout !
My problem is that I want to regroup some JtextFields and Jlabels under one title (TitledBorder) in my interface, is there a way to add the border directly in my container, or should I create another JPanel to regroup my components and then add the hole Panel to my GridBagLayout ?
Based on the pic you provided, the typical solution would be to have 2 separate panels, each with their own TitledBorder, and then place both of these panels on a third outer panel.
However, you could create a similar effect on a single panel by replacing the TitledBorders with a combination of a JLabel followed by a JSeparator.
The difference is that the logical "group" of fields is now only defined by title that isn't surrounding the whole group. Some people prefer this, others do not.
Here's a sample of your pic to give you the idea:
import java.awt.*;
import javax.swing.*;
public class Test implements Runnable
{
private JTextField firstName;
private JTextField lastName;
private JTextField title;
private JTextField nickname;
private JComboBox format;
public static void main(String[] args)
{
SwingUtilities.invokeLater(new Test());
}
public Test()
{
firstName = new JTextField(20);
lastName = new JTextField(20);
title = new JTextField(20);
nickname = new JTextField(20);
format = new JComboBox();
}
public void run()
{
JFrame frame = new JFrame();
frame.getContentPane().add(createPanel());
frame.pack();
frame.setVisible(true);
}
private JPanel createPanel()
{
JPanel p = new JPanel(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 0;
gbc.insets = new Insets(4,4,4,4);
gbc.ipadx = 1;
gbc.ipady = 1;
gbc.anchor = GridBagConstraints.WEST;
JLabel nameHeader = new JLabel("Name:");
nameHeader.setForeground(Color.RED.darker());
p.add(nameHeader, gbc);
gbc.gridx = 1;
gbc.gridwidth = 3;
gbc.fill = GridBagConstraints.HORIZONTAL;
p.add(new JSeparator(JSeparator.HORIZONTAL), gbc);
gbc.gridx = 0;
gbc.gridy = 1;
gbc.gridwidth = 1;
gbc.fill = GridBagConstraints.NONE;
p.add(new JLabel("First Name"), gbc);
gbc.gridx = 1;
p.add(firstName, gbc);
gbc.gridx = 2;
p.add(new JLabel("Last Name"), gbc);
gbc.gridx = 3;
p.add(lastName, gbc);
gbc.gridx = 0;
gbc.gridy = 2;
p.add(new JLabel("Title"), gbc);
gbc.gridx = 1;
p.add(title, gbc);
gbc.gridx = 2;
p.add(new JLabel("Nickname"), gbc);
gbc.gridx = 3;
p.add(nickname, gbc);
gbc.gridx = 0;
gbc.gridy = 3;
p.add(new JLabel("Format"), gbc);
gbc.gridx = 1;
gbc.gridwidth = 3;
gbc.fill = GridBagConstraints.HORIZONTAL;
p.add(format, gbc);
return p;
}
}
You could play with the constraints to polish this up a bit, but you get the idea.
An upside to this approach is that when adding more fields for the Email section, you can get them to line up with the fields in the Name section. With separate panels, this would be more difficult (you could use a bunch of Box.createHorizontalStrut(...) for this).
The downside to this approach is that you now have a large panel with many fields, and it could get a bit unwieldy to maintain if you need to add more fields.
Try This :
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
class SwingLayoutDemo {
private JFrame mainFrame;
private JLabel headerLabel;
private JLabel statusLabel;
private JPanel controlPanel;
private JLabel msglabel;
public SwingLayoutDemo(){
prepareGUI();
}
public static void main(String[] args){
SwingLayoutDemo swingLayoutDemo = new SwingLayoutDemo();
swingLayoutDemo.showGridBagLayoutDemo();
}
private void prepareGUI(){
mainFrame = new JFrame("Java SWING Examples");
mainFrame.setSize(400,400);
mainFrame.setLayout(new GridLayout(3, 1));
headerLabel = new JLabel("",JLabel.CENTER );
statusLabel = new JLabel("",JLabel.CENTER);
statusLabel.setSize(350,100);
mainFrame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent windowEvent){
System.exit(0);
}
});
controlPanel = new JPanel();
controlPanel.setBorder(new TitledBorder (
new LineBorder (Color.black, 5),
"Title String"));
controlPanel.add(new JLabel("TitledBorder using LineBorder"));
controlPanel.setLayout(new FlowLayout());
mainFrame.add(headerLabel);
mainFrame.add(controlPanel);
mainFrame.add(statusLabel);
mainFrame.setVisible(true);
}
private void showGridBagLayoutDemo(){
headerLabel.setText("Layout in action: GridBagLayout");
JPanel panel = new JPanel();
panel.setBackground(Color.darkGray);
panel.setSize(300,300);
GridBagLayout layout = new GridBagLayout();
panel.setLayout(layout);
GridBagConstraints gbc = new GridBagConstraints();
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridx = 0;
gbc.gridy = 0;
panel.add(new JButton("Button 1"),gbc);
gbc.gridx = 1;
gbc.gridy = 0;
panel.add(new JButton("Button 2"),gbc);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.ipady = 20;
gbc.gridx = 0;
gbc.gridy = 1;
panel.add(new JButton("Button 3"),gbc);
gbc.gridx = 1;
gbc.gridy = 1;
panel.add(new JButton("Button 4"),gbc);
gbc.gridx = 0;
gbc.gridy = 2;
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridwidth = 2;
panel.add(new JButton("Button 5"),gbc);
controlPanel.add(panel);
mainFrame.setVisible(true);
}
}