Using BorderLayout I have put two different JButtons, one on the left (west) and one on the right (east), and a horizontal JSeparator in the center. What I want to do is to y-align the separator to the center, instead of to the top as it is now. I have already tried to use the following method on the separator
setAlignmentY(CENTER_ALIGNMENT);
but it has absolutely no effect. What am I missing? If it is not possible, is there any other way to do that without using external libraries?
This is what I get:
and this is what I want to achieve:
This is the sample code that I am using (JPanels on top and bottom were added just for clarity):
import java.awt.BorderLayout;
import javax.swing.*;
public class SeparatorTest extends JFrame{
JButton btn1 = new JButton("button1");
JSeparator sep = new JSeparator(SwingConstants.HORIZONTAL);
JButton btn2 = new JButton("button2");
public SeparatorTest() {
getContentPane().add(BorderLayout.NORTH, new JPanel());
getContentPane().add(BorderLayout.WEST, btn1);
getContentPane().add(BorderLayout.CENTER, sep);
getContentPane().add(BorderLayout.EAST, btn2);
getContentPane().add(BorderLayout.SOUTH, new JPanel());
setSize(300, 85);
}
public static void main(String[] args){
new SeparatorTest().setVisible(true);
}
}
EDIT 1: I don't mind the layout as long as it looks the same, I used BorderLayout here due to its simpleness.
This will have to do with how the JSeparator UI delegate decides how to paint the component, which, based on your tests, seems to want to always paint the separator starting at a y position of 0.
Instead, you might need to wrap the JSeparator in another panel which can use a different layout manager which meets your needs, like GridBagLayout for example (of course you could just use GridBagLayout to start with, but I'm aiming for the smallest change possible ;))
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JSeparator;
import javax.swing.SwingConstants;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class SeparatorTest extends JFrame {
JButton btn1 = new JButton("button1");
JSeparator sep = new JSeparator(SwingConstants.HORIZONTAL);
JButton btn2 = new JButton("button2");
public SeparatorTest() {
JPanel pane = new JPanel(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridwidth = GridBagConstraints.REMAINDER;
gbc.weightx = 1;
gbc.fill = GridBagConstraints.HORIZONTAL;
pane.add(sep, gbc);
getContentPane().add(BorderLayout.NORTH, new JPanel());
getContentPane().add(BorderLayout.WEST, btn1);
getContentPane().add(BorderLayout.CENTER, pane);
getContentPane().add(BorderLayout.EAST, btn2);
getContentPane().add(BorderLayout.SOUTH, new JPanel());
setSize(300, 85);
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
SeparatorTest frame = new SeparatorTest();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
}
Related
I am relatively new to programming, so I am sorry if this question is stupid. I am creating a Java program that involves one JButton inside a JPanel, and the JPanel is in a JFrame. Another button is outside the JPanel but still in the JFrame. I set the layout to a BoxLayout. My problem is that the the panel, which I made black, is taking up the whole JFrame except for where the second button is. How do I make the JPanel so it is only taking up the area right around the first button?
public class alt {
JFrame frame = new JFrame();
JPanel panel = new JPanel();
JButton button1 = new JButton("button 1");
JButton button2 = new JButton("button 2");
public alt(){
frame.setVisible(true);
frame.getContentPane().setLayout(new BoxLayout(frame.getContentPane(), BoxLayout.Y_AXIS));
panel.setBackground(Color.black);
frame.setTitle("test");
frame.setExtendedState(java.awt.Frame.MAXIMIZED_BOTH);
panel.add(button1);
frame.add(panel);
frame.add(button2);
button2.setAlignmentX(Component.CENTER_ALIGNMENT);
}
}
You could make use of a different layout manager, one which gives you more control over deciding how space is allocated and filling is handled, for example, GridBagLayout...
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class SampleLayout {
public static void main(String[] args) {
new SampleLayout();
}
public SampleLayout() {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
JPanel panel = new JPanel();
JButton button1 = new JButton("button 1");
JButton button2 = new JButton("button 2");
panel.setBackground(Color.black);
panel.add(button1);
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridwidth = GridBagConstraints.REMAINDER;
frame.add(panel, gbc);
frame.add(button2, gbc);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
}
Take a look at Laying Out Components Within a Container for more details
The reason why your panel takes up the bulk of the frame's content pane lies
in the way the BoxLayout manager works with the minimum, preferred,
and maximum values of components. It takes the maximum value of a component
into account. And since the maximum value of a JPanel is huge, it takes
all the space available. The solution is to change the maximum value
of a panel. However, this is bad practice. I do not recommend to use
the BoxLayout manager -- it is very weak and leads to poor code.
I recommend to use either the MigLayout manager or the GroupLayout manager.
I provide three solutions: a corrected BoxLayout solution, a MigLayout solution,
and a GroupLayout solution.
BoxLayout solution
We determine the maximum size of the button and change the panel's size
to be a bit larger than the button's.
package com.zetcode;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.EventQueue;
import javax.swing.BorderFactory;
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class BoxLayoutPanel extends JFrame {
public BoxLayoutPanel() {
initUI();
}
private void initUI() {
JPanel cpane = (JPanel) getContentPane();
cpane.setBorder(BorderFactory.createEmptyBorder(15, 15, 15, 15));
cpane.setLayout(new BoxLayout(cpane,
BoxLayout.Y_AXIS));
JPanel pnl = new JPanel();
JButton btn1 = new JButton("Button 1");
JButton btn2 = new JButton("Button 2");
Dimension dm = btn1.getMaximumSize();
dm.height += 15;
dm.width += 15;
pnl.setMaximumSize(dm);
pnl.setBackground(Color.black);
add(pnl);
add(Box.createVerticalStrut(10));
pnl.add(btn1);
btn2.setAlignmentX(Component.CENTER_ALIGNMENT);
add(btn2);
setTitle("BoxLayout solution");
pack();
setLocationRelativeTo(null);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
BoxLayoutPanel ex = new BoxLayoutPanel();
ex.setVisible(true);
}
});
}
}
This is not a clean solution. Generally, we should avoid calling the getMaximumSize() and
the setMaximumSize() in the application code -- this is the layout manager's job. Also in three occasions, we use fixed pixel widths: when we define an empty border, a vertical strut, and a maximum panel's size. This code is however not portable.
Pixel widths change when the resolution of the screen changes. This is a
shortcoming of the BoxLayout manager.
MigLayout solution
This solution is much cleaner and more portable. MigLayout is a third-party
manager, so we need to download additional libraries.
package com.zetcode;
import java.awt.Color;
import java.awt.EventQueue;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import net.miginfocom.swing.MigLayout;
public class MigLayoutPanel extends JFrame {
public MigLayoutPanel(){
initUI();
setTitle("MigLayout solution");
setLocationRelativeTo(null);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
private void initUI() {
JPanel main = new JPanel(new MigLayout("center"));
JPanel pnl2 = new JPanel();
JButton btn1 = new JButton("Button 1");
JButton btn2 = new JButton("Button 2");
pnl2.setBackground(Color.black);
pnl2.add(btn1);
main.add(pnl2, "wrap");
main.add(btn2, "alignx center");
add(main);
pack();
}
public static void main(String[] args){
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
MigLayoutPanel ex = new MigLayoutPanel();
ex.setVisible(true);
}
});
}
}
GroupLayout solution
GroupLayout is a built-in layout manager. With MigLayout, they are the most
portable and flexible layout managers.
package com.zetcode;
import java.awt.Color;
import java.awt.Container;
import java.awt.EventQueue;
import javax.swing.GroupLayout;
import static javax.swing.GroupLayout.Alignment.CENTER;
import static javax.swing.GroupLayout.DEFAULT_SIZE;
import static javax.swing.GroupLayout.PREFERRED_SIZE;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import static javax.swing.LayoutStyle.ComponentPlacement.RELATED;
public class GroupLayoutPanel extends JFrame {
public GroupLayoutPanel(){
initUI();
setTitle("GroupLayout solution");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLocationRelativeTo(null);
}
private void initUI() {
Container pane = getContentPane();
GroupLayout gl = new GroupLayout(pane);
pane.setLayout(gl);
JPanel pnl = new JPanel();
JButton btn1 = new JButton("Button 1");
pnl.add(btn1);
JButton btn2 = new JButton("Button 2");
pnl.setBackground(Color.black);
gl.setAutoCreateGaps(true);
gl.setHorizontalGroup(gl.createSequentialGroup()
.addContainerGap(DEFAULT_SIZE, Integer.MAX_VALUE)
.addGroup(gl.createParallelGroup(CENTER)
.addComponent(pnl, DEFAULT_SIZE, DEFAULT_SIZE,
PREFERRED_SIZE)
.addComponent(btn2))
.addContainerGap(DEFAULT_SIZE, Integer.MAX_VALUE)
);
gl.setVerticalGroup(gl.createSequentialGroup()
.addContainerGap()
.addComponent(pnl, DEFAULT_SIZE, DEFAULT_SIZE,
PREFERRED_SIZE)
.addPreferredGap(RELATED)
.addComponent(btn2)
.addContainerGap()
);
pack();
}
public static void main(String[] args){
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
GroupLayoutPanel ex = new GroupLayoutPanel();
ex.setVisible(true);
}
});
}
}
I tried a bunch of different layouts but none are giving me the desired effect.
I want something like this:
+-----------------------------+
Centered Text
+-------+
|Button |
+-------+
+-----------------------------+
In html it might look like this:
<p align="center">Some text</p>
<input type="button" value="Press"/>
The trouble I am having is with certain layouts (BorderLayout) it likes to resize the button to fit. Other layouts (Boxlayout and GroupLayout) will do something like this:
+-----------------------------+
Centered Text
+-------+
|Button |
+-------+
+-----------------------------+
Even when I have the JLabel aligned to CENTER and the Button aligned to LEFT.
Much appreciation to my helpers.
There are a number layouts that would be able to achieve this, in fact, you might even be able to use BorderLayout and FlowLayout together to do this, but this example simply uses GridBagLayout
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class ExampleLayout {
public static void main(String[] args) {
new ExampleLayout();
}
public ExampleLayout() {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
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();
gbc.gridx = 0;
gbc.gridy = 0;
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridwidth = GridBagConstraints.REMAINDER;
gbc.weightx = 1;
JLabel center = new JLabel("Centered Text");
center.setHorizontalAlignment(JLabel.CENTER);
add(center, gbc);
gbc.gridy++;
gbc.fill = GridBagConstraints.NONE;
gbc.gridwidth = 1;
gbc.weightx = 0;
gbc.anchor = GridBagConstraints.WEST;
JButton button = new JButton("Button");
add(button, gbc);
}
}
}
Take a look at Laying Out Components Within a Container for more examples and details
Although MadProgrammer and Costis Aivalis already answered your question, here is also an answer with MigLayout:
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import net.miginfocom.swing.MigLayout;
public class MigLayoutDemo {
JFrame frame = new JFrame();
JPanel panel = new JPanel();
JLabel label = new JLabel("Centered text");
JButton button = new JButton("Button");
public MigLayoutDemo() {
panel.setLayout(new MigLayout());
label.setHorizontalAlignment(JLabel.CENTER);
panel.add(label, "wrap, pushx, growx");
panel.add(button);
frame.add(panel);
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(MigLayoutDemo::new);
}
}
Same effect, but this approach is less verbose unlike in case of GridBagLayout and I personally think that MigLayout is easier to use.
FlowLayout(int align) allows you to define justification. The default is CENTER. If you just left justify the FlowLayout of the panel that contains your button it works without having to use GridBagLayout manually. NetBeans provide an excellent GridBagLayout customizer, but you do not want to touch the code it generates automatically.
import javax.swing.*;
import java.awt.*;
public class MyLooks extends JFrame {
public MyLooks() {
setDefaultCloseOperation(EXIT_ON_CLOSE);
p = new JPanel(new GridLayout(2, 1));
p1 = new JPanel();
p2 = new JPanel(new FlowLayout(FlowLayout.LEFT));
myLabel = new JLabel("this is a label");
myButton = new JButton("press");
p1.add(myLabel);
p2.add(myButton);
p.add(p1);
p.add(p2);
setContentPane(p);
pack();
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
new MyLooks().setVisible(true);
}
});
}
private JLabel myLabel;
private JButton myButton;
private JPanel p, p1, p2;
}
I have worked hard on writing my GUI in swing however I am trying to improve it further since I feel it still looks a little off.
I would ideally like:
the button to snap to the top right,
the textfield to be the same height as the button and stretch from the top left to the button edge
the scrollpane to stretch from the bottom of the textfield and the button to the edges of the window even when stretched.
I'm unsure how to "snap" the components to the top right, top left and rest of the area respectively.
#SuppressWarnings("serial")
class TFrame extends JFrame
{
TFrame()
{
super("Huffman Compression");//setTitle
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setSize(400, 300);
setResizable(true);
jPanel = new JPanel();
jTextField = new JTextField("Enter string to compress...");
jButton = new JButton("Compress");
jButton.setFocusable(false);
jTextArea = new JTextArea("LOG AREA", 30, 30);
jTextArea.setWrapStyleWord(true);
jTextArea.setLineWrap(true);
jTextArea.setEditable(false);
jTextArea.setFocusable(false);
jTextArea.setOpaque(false);
jScrollPane = new JScrollPane(jTextArea);
jScrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
jScrollPane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
jPanel.add(jTextField, BorderLayout.WEST);
jPanel.add(jButton, BorderLayout.EAST);
jPanel.add(jScrollPane, BorderLayout.SOUTH);
add(jPanel);
try
{
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException
| InstantiationException
| IllegalAccessException
| UnsupportedLookAndFeelException e)
{
e.printStackTrace();
}
setVisible(true);
}
private JPanel jPanel;
private JTextField jTextField;
private JButton jButton;
private JTextArea jTextArea;
private JScrollPane jScrollPane;
}
public static void main(String[] args)
{
TFrame frame = new TFrame();
frame.pack();
...
This is what it currently looks like:
http://i.imgur.com/90cmDl1.png
Regards.
Basically, you need to take advantage of a series of layout managers (commonly known as "compound layouts").
For example, you can accomplish the requirements for the button and field using a GridBagLayout and the by using a BorderLayout, you can accomplish the rest, for example...
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class BrowserWindow {
public static void main(String[] args) {
new BrowserWindow();
}
public BrowserWindow() {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
JPanel topPane = new JPanel(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 0;
gbc.weightx = 1;
gbc.fill = GridBagConstraints.BOTH;
topPane.add(new JTextField(10), gbc);
gbc.weightx = 0;
gbc.fill = GridBagConstraints.NONE;
gbc.gridx++;
topPane.add(new JButton("Compress"), gbc);
JTextArea ta = new JTextArea("Log...", 30, 30);
JScrollPane sp = new JScrollPane(ta);
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(topPane, BorderLayout.NORTH);
frame.add(sp);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
}
Take a look at Laying Out Components Within a Container for more details
i create a frame like this. but i don't know how to align this.
I want timed off version 1.1 is center on the top and in next line Subject label followed by subject text box and in next line body label followed by body text box.
And in text box when i type more, it not bounce to next time. the text goes to invisible but enter in same line. i hope you help me. and sorry i'm not good in English.
You need to change the layut manager.
Start by taking a look at A Visual Guide to Layout Managers and Using Layout Managers
Personally, I'd recommend GridBagLayout, it is the most flexible, but also the most complex layout manager available in the default libraries
You may also find How to use Scroll Panes of some use
Update With Example
Take a look at How to use GridBagLayout for more details
import java.awt.Color;
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 javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class TestLayout27 {
public static void main(String[] args) {
new TestLayout27();
}
public TestLayout27() {
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() {
JLabel l1 = new JLabel("Timedoff Version 1.1", JLabel.CENTER);
l1.setBackground(Color.red);
l1.setForeground(Color.yellow);
JLabel l2 = new JLabel("subject:");
JTextField b = new JTextField("subject", 15);
JLabel l3 = new JLabel("Body:");
JTextArea a1 = new JTextArea("boby", 10, 20);
setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 0;
gbc.anchor = GridBagConstraints.WEST;
add(l1, gbc);
gbc.gridy++;
add(l2, gbc);
gbc.gridy++;
add(b, gbc);
gbc.gridy++;
add(l3, gbc);
gbc.gridy++;
add(a1, gbc);
}
}
}
I am wondering about this since we are making a game in Swing and we made our map tiles into jButtons instead of jPanels for whatever reason. Now we want to put units on top of them so the map background is still shown when the unit is on top of them. Anyone know if this is possible?
OK, so I am not sure this is really what you are looking for and how your application is currently set up, but this is an example to have JButtons on top of each other (if this is not what you are looking for, consider posting an SSCCE and give more details). There are other alternatives and better way to handle such thing, but since you asked JButton over a JButton, here is a snippet showing that:
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.net.MalformedURLException;
import java.net.URL;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.plaf.ButtonUI;
import javax.swing.plaf.basic.BasicButtonUI;
public class TestButtonGrid {
protected int x;
protected int y;
protected void initUI() throws MalformedURLException {
final JFrame frame = new JFrame();
frame.setTitle(TestButtonGrid.class.getSimpleName());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
final JPanel panel = new JPanel(new GridBagLayout());
ImageIcon icon = new ImageIcon(new URL("http://manhack-arcade.net/pivot/isdrawing/tile_bluerock.png"));
ImageIcon unit = new ImageIcon(new URL("http://static.spore.com/static/image/500/642/783/500642783372_lrg.png"));
ButtonUI ui = new BasicButtonUI();
GridBagConstraints gbc = new GridBagConstraints();
gbc.weightx = 1.0;
gbc.weighty = 1.0;
gbc.fill = GridBagConstraints.BOTH;
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
gbc.gridx = i;
gbc.gridy = j;
JButton button = new JButton(icon);
button.setBorderPainted(false);
button.setPreferredSize(new Dimension(icon.getIconWidth(), icon.getIconHeight()));
button.setUI(ui);
button.setOpaque(false);
panel.add(button, gbc);
if (i == j) {
// Choose a layout that will center the icon by default
button.setLayout(new BorderLayout());
JButton player = new JButton(unit);
player.setPreferredSize(new Dimension(unit.getIconWidth(), unit.getIconHeight()));
player.setBorderPainted(false);
player.setUI(ui);
player.setOpaque(false);
button.add(player);
}
}
}
frame.add(panel);
frame.setResizable(false);
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
try {
new TestButtonGrid().initUI();
} catch (MalformedURLException e) {
e.printStackTrace();
}
}
});
}
}
It might be a better idea to have a panel which contains buttons. Your panel could then use a mouse event listener to perform an action when clicked on.
The advantage of using a jPanel is that you can set a layout within it, which will make positioning your buttons in it much easier.
Well it is possible to put a JButton Over an other JButton you just wont be able to see it.
CardLayout cl = new CardLayout();
JPanel jpnlMain = new JPanel(cl);
jpnlMain.add(new JButton(), "FIRST");
jpnlMain.add(new JButton(), "SECOND");
Then Maybe you could create a Class that Extends Either the Cardlayout or the JPanel to make it show both Items.
EDIT
Made a little Test and HJere is a Button in a Button Buttonception!!
Main class:
import javax.swing.JFrame;
public class Test {
public static void main(String[] arg0){
SpecialButton sp = new SpecialButton();
JFrame jf = new JFrame();
jf.add(sp);
jf.setVisible(true);
jf.pack();
}
}
Special Button Class:
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class SpecialButton extends JButton{
SpecialButton(){
super();
JButton jbtnMid = new JButton();
JLabel jlblMid = new JLabel(new ImageIcon(this.getClass().getResource("/Images/arrowUpIcon.png")));
jbtnMid .add(jlblMid);
this.add(jbtnMid);
this.setVisible(true);
}
}