Resizing JFrame
I have a JFrame with many panels and components, and every time I manually resize it, the textArea seems to resize okay, butthe rest of the buttons remain where they are, it's quite a pain. What doI do?
(this is a Swing question but no one in Swing seems to have answered it, sorry)
Use GridBagLayout
Use the following method
<CODE>
// this is a helper method for GridBagConstraint Layout
public void addComp(Component comp,Container cont, GridBagLayout gb1,GridBagConstraints gbc,int row,int col, int numRows, int numCols, double weightx, double weighty,int theAnchor)
gbc.gridx = col;
gbc.gridy = row;
gbc.gridwidth = numCols;
gbc.gridheight = numRows;
gbc.weightx = weightx;
gbc.weighty = weighty;
gbc.anchor = theAnchor;
cont.add(comp,gbc);
<CODE>
Then use the following line anytime you want to place a component
addComp(theComponent,theJFrame,gb1,gbc,column,row,1,1,1,1,gbc.WEST);
Look up GridBAgConstraint and you will find other options for the last one eg (gbc.NORTHEAST , gbc.CENTER)
At the start declare
<CODE>
GridBagLayout gb1 = new GridBagLayout();
GridBagConstraints gbc = new GridBagConstraints();
setLayout(gb1);
<CODE>
Sorry about the indentation!! Hope this helps you.i found this very useful and you can arrange components exactly the way you want,let me know if it is helpful
Similar Messages
-
Resizing JFrames and JPanels !!!
Hi Experts,
I had one JFrame in which there are three objects, these objects are of those classes which extends JPanel. So, in short in one JFrame there are three JPanels.
My all JPanels using GridBagLayout and JFrame also using same. When I resize my JFrame ,it also resize my all objects.
My Problem is how should i allow user to resize JPanels in JFrame also?? and if user is resizing one JPanel than other should adjust according to new size ...
Plese guide me, how should i do this ...
Thanknig Java Community,
Dhwanit ShahHey there, thanx for your kind intereset.
Here is sample code .
In which there is JFrame, JPanel and in JPanel ther is one JButton.Jpanel is added to JFrame.
I want to resize JPanel within JFrame,I am able to do resize JFrame and JPanel sets accroding to it.
import java.awt.*;
import javax.swing.*;
import com.borland.jbcl.layout.*;
public class FramePanel extends JFrame {
JPanel contentPane;
GridBagLayout gridBagLayout1 = new GridBagLayout();
public FramePanel() {
try {
jbInit();
catch(Exception e) {
e.printStackTrace();
public static void main(String[] args) {
FramePanel framePanel = new FramePanel();
private void jbInit() throws Exception {
contentPane = (JPanel) this.getContentPane();
contentPane.setLayout(gridBagLayout1);
this.setSize(new Dimension(296, 284));
this.setTitle("Frame and Panel Together");
MyPanel myPanel = new MyPanel();
this.getContentPane().add(myPanel);
this.setVisible(true);
class MyPanel extends JPanel {
public MyPanel() {
this.setSize(200,200);
this.setLayout(new FlowLayout());
this.setBackground(Color.black);
this.setVisible(true);
this.add(new JButton("Dhwanit Shah"));
I think i might explained my problem
Dhwanit Shah
[email protected] -
Resizing JFrame on button click to show an image on the JFrame
Dear All,
I have a JFrame which has an empty label. On button click I want to set an icon for the label and want the JFrame to be resized to show that icon. I am using frame.pack() and I am not using any other sizing function. The code that I have right now, prints the image on the panel, but does not resize the frame to show the image. Pleae could someone help.package gui;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
public class ComponentDemo extends JPanel implements ActionListener,
ItemListener, MouseListener, KeyListener {
private JTextArea textarea;
private JButton button;
private final static String newline = "\n";
private JLabel imageIcon;
public ComponentDemo() {
button = new JButton("JButton welcomes you to CO2001");
button.addActionListener(this);
add(button);
textarea = new JTextArea(10, 50);
textarea.setEditable(false);
addMouseListener(this);
textarea.addKeyListener(this);
JScrollPane scrollPane = new JScrollPane(textarea);
add(scrollPane);
imageIcon = new JLabel();
add(imageIcon);
setBackground(Color.pink);
new JScrollPane(this);
* Create the GUI and show it. For thread safety, this method should be
* invoked from the event-dispatching thread.
private static void createAndShowGUI() {
// Create and set up the window.
JFrame frame = new JFrame("Simple FrameDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
frame.setLocation(700, 200);
// get the content pane and set the background colour;
frame.add(new ComponentDemo());
// frame.setSize(screenSize);
// frame.getContentPane().setBackground(Color.cyan);
// Display the window.
frame.pack();
frame.setVisible(true);
frame.setResizable(true);
public static void main(String[] args) {
// Schedule a job for the event-dispatching thread:
// creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
if (e.getSource() instanceof JButton) {
// System.out.println(e.getSource());
String text = ((JButton) e.getSource()).getText();
textarea.append(text + newline);
textarea.setBackground(Color.cyan);
textarea.setForeground(Color.BLUE);
textarea.setCaretPosition(textarea.getDocument().getLength());
imageIcon.setIcon(createImageIcon("SwingingDuke.png",
"Image to be displayed"));
@Override
public void itemStateChanged(ItemEvent arg0) {
// TODO Auto-generated method stub
@Override
public void mouseClicked(MouseEvent arg0) {
textarea.append("A Mouse click welcomes you to CO2001" + newline);
textarea.setBackground(Color.green);
textarea.setCaretPosition(textarea.getDocument().getLength());
@Override
public void mouseEntered(MouseEvent arg0) {
// TODO Auto-generated method stub
@Override
public void mouseExited(MouseEvent arg0) {
// TODO Auto-generated method stub
@Override
public void mousePressed(MouseEvent arg0) {
// TODO Auto-generated method stub
@Override
public void mouseReleased(MouseEvent arg0) {
// TODO Auto-generated method stub
@Override
public void keyPressed(KeyEvent e) {
System.out.println(e.getKeyChar());
textarea.append("The key " + e.getKeyChar()
+ " click welcomes you to CO2001" + newline);
textarea.setBackground(Color.YELLOW);
textarea.setFont(new Font("Arial", Font.ITALIC, 16));
textarea.setCaretPosition(textarea.getDocument().getLength());
@Override
public void keyReleased(KeyEvent e) {
System.out.println(e.getKeyChar());
// textarea.append("The key "+
// e.getKeyChar()+" click welcomes you to CO2001" + newline);
// textarea.setBackground(Color.green);
// textarea.setCaretPosition(textarea.getDocument().getLength());
@Override
public void keyTyped(KeyEvent e) {
// TODO Auto-generated method stub
System.out.println(e.getKeyChar());
// textarea.append("The key "+
// e.getKeyChar()+" click welcomes you to CO2001" + newline);
// textarea.setBackground(Color.blue);
// textarea.setCaretPosition(textarea.getDocument().getLength());
/** Returns an ImageIcon, or null if the path was invalid. */
protected ImageIcon createImageIcon(String path, String description) {
java.net.URL imgURL = getClass().getResource(path);
if (imgURL != null) {
System.out.println("found");
return new ImageIcon(imgURL, description);
} else {
System.err.println("Couldn't find file: " + path);
return null;
}myJPanel.setPerferredSize(new Dimension(new_width, new_hight));
myJFrame.pack(); -
Increasing font size when resizing JFrame
Hello,
I am writing a calculator program, and therefore have a JLabel to display the numbers and multiple buttons. The JLabel and JButton components are added to a panel with a GridBagLayout, which is then added to the content pane of a JFrame. When the JFrame is resized, the size of the JButton and JLabel are increased, but the font in both of them stays the same. Is there anyway to increase the font size proportional to the size of the JButton and JLabel?Note: This thread was originally posted in the [Java Programming|http://forums.sun.com/forum.jspa?forumID=31] forum, but moved to this forum for closer topic alignment.
-
Resizing JFrame is Sluggish on 1.6.0_10 under (at least) Vista
Hello,
My JFrame takes about 10-30 ms to repaint. Yet on Vista and u10 the resizing of the JFrame is very sluggish. The window decorations themselves are updated nice and fast, but the content doesn't keep up at all. If I continuously resize the window it can be several seconds until the content of the window is updated.
Now for something that is harder to explain, but I'll try.. If I keep resizing the window in the smaller sizes (like below 200x200 pixels) the update rate is getting better and I can resize the window at larger sizes with decent update frequencies.. For a while.. But after a few seconds with resizing in the larger sizes (like 1000x800) the update rate goes down again and the content keeps lagging as bad as it did before.
I guess there's some algo that repaints the content depending on how long time the last couple of repaints took? Well, the problem is that that algo seems to be very broken in 1.6.0_10... If I run the same test app in 1.6.0_07 everything works fine.. Same on the Mac, which is by far the platform that feels fastest, even thought the actual painting takes longer...
Now, this is NOT because of the actual painting takes time. I have tested with just a small fillRect and the result is basically the same.
The problem here is that u10 should be faster (and some of the gfx is now really fast, kudos Swing/Java2D-guys!) but the GUI now feels very sluggish due to this "bug".
So... Does anyone know how to increase or force the update rate of the content or is this a plain bug that is in serious need to get fixed?
Cheers,
Mikael GrevSure, NP.
A test case doesn't get simpler than this I think. :)
Sluggish under 1.6.0_10 and pretty good under 1.6.0_07.
A have a two-screen setup on Vista using my Macbook Pro 2,4GHz, 4GB memory. External screen is a 30" Cinema Display.
Cheers,
Mikael
import javax.swing.*;
import java.awt.*;
public class FrameUpdateTest
private final JFrame mainWindow = new JFrame();
private void launch()
mainWindow.getContentPane().setBackground(Color.WHITE);
mainWindow.setSize(1000, 800);
mainWindow.setLocationRelativeTo(null);
mainWindow.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
mainWindow.setVisible(true);
public static void main(String[] args)
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new FrameUpdateTest().launch();
} -
Resize JFrame without flickering
When I try to resize my frame with the setSize() methode it starts
flickering but if i resize with the mouse it works fine.
Is there an other solution to resize a JFrame without flickering?
import java.awt.*;
import javax.swing.*;
public class TestFrame extends JFrame {
JPanel panel = new JPanel();
JButton button = new JButton("Resize");
public TestFrame() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setSize(200,200);
setLayout(new GridLayout());
panel.setBackground(Color.red);
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
setSize(getSize().width + 1, getSize().height + 1);
this.add(button);
this.add(panel);
public static void main(String[] args) {
TestFrame frame = new TestFrame();
frame.setVisible(true);
}frame.setUndecorated(true);and implement MouseListener and MouseMotionListener for resizing by mouse dragging on the edge
-
Resizing JFrame with a Jbutton click
I've witten a simple GUI program that if you click on one button it increases the size of the JFrame and the other button will decrease it. The problem is I tried using ComponentResize() putting a listener on the buttons,but it wouldn't work. Anybody with an idea of how I could do this?
try this code
public void actionListener (ActionEvent e)
int increment = 20;
frame.setBounds (0,0,frame.getWidth()+increment,frame.getWidth()+increment);
} -
Resizing JFrame according to screen resolution
I have developed a desktop application using netbeans 6.1.Screen works fine for 1024x768 pixels but when i change the resolution or when i execute the application on a different machine which has got a lesser resolution the components disappear and they are not displayed properly.I have used Free Design Layout for desiging my screens.Is there any issue with the layout used?.I have used ToolKit to get the screen size and tried setting the dimensions using setPreferredSize()/setSize() but nothing works.Could any one help me with a solution?
Thanks in advance
Regards
Nivethanivetha wrote:
I have used Free Design Layout for desiging my screens.Is there any issue with the layout used?I am not familiar with the Layout and do not find it under the API listings for Java 1.6.0_07.
I see, I just caught a NetBeans thread--you're using the GUI Builder in NetBeans. That layout you mentioned is not a layout, but a description of what they call their method of GUI generation--it still uses a regular Java Layout in that autogenerated GUI code.
You're question is not a Java question, but rather, a query on if NetBeans has some problems with it's GUI Builder in the version of NetBeans that you are using. It would be more appropriate to ask that question over on the NetBeans site unless you can look in the autogenerated code and tell us what Layout you are using. -
JFrame decorations and resizing
I'm creating a simple resizable JFrame with some components. When the user resizes the frame by dragging the decorations, the frame does not resize until the user releases the mouse. For example, if increasing the size of the frame, a gray box extends from the frame until the mouse is released. The entire process looks hideous, since the gray box looks tacky and the frame flickers badly. How do I force the frame to resize the decorations and root pane while the user is dragging?
This problem is really bugging me. I haven't worked with Swing in some time, so I'm adapting a lot of code from one of my earlier projects. Interestingly enough, my last project's main window resized exactly the way I want! The decorations and root pane adjust with the dragging of the mouse. All day, I've been scouring through my old code to no avail.
Both programs are running on the same JDK (1.4.2) in Windows XP Home.
Thanks in advance for any help!This code reproduces the problem on my system. As far as I know, this is the standard way to create a custom JFrame.
import javax.swing.*;
public class MyFrame extends JFrame {
public MyFrame() {
JPanel panel = new JPanel();
panel.setBorder(BorderFactory.createRaisedBevelBorder());
getContentPane().add(panel);
public static void main(String[] args) {
// JFrame.setDefaultLookAndFeelDecorated(true);
JFrame frame = new MyFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}I'm primarily concerned with the root pane. In this example, the decorations resize as the user drags, since they're drawn by the underlying OS. If I uncomment the look and feel line, then the decorations do not resize with the mouse. In both cases, the root pane does not resize until the user releases the mouse.
Thanks for your help! -
I need to be able to resize everything in my jframe according to its height/width. I need to be able to get the w/h at runtime, and if it is changed durring runtime, sense it there too. I have tried searching but all i get is how to resize jframes.
Thank you for your help
.dokI think adding a WindowStateListener to your JFrame might do the job.
kind regards,
Jos
edit: but of course as has been suggested in reply #1,
using LayoutManagers is the way to go. -
hi..
i am trying to create a custom JFrame kind of look, by setting it to undercorated and creating my own Title bar, status bar, borders, and close/minimize/maximize buttons.
The problem that i am having is once you set the jframe to undercorated, the mouse events for resizing JFrame are gone. Is there a way to get it to resize again? (maybe by registering new mouse listeners and somehow redirecting them back to the jframe listeners)
Thnx in advance.yea i suppose i could use a JWindow but i would still have the same resize problem.
i tried making my own resize functions for the customized jframe dynamically resizing it while the mouse is dragged, but the whole frame flashes while resizing.
The following code is an example of a test customised JFrame which shows the problem i am having (flashing while resizing)
I only added the resize from the north (bottom) of the frame so i can make the code easier to read.
I dont know if this is a good way or if there is an easier way to do it?
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class TestFrame extends JFrame implements MouseMotionListener, MouseListener
Point sp;
int compStartHeight;
int minHeight = 100;
JPanel frameContent = new JPanel();
public TestFrame()
super("testing frame");
setSize(600, 600);
setContentPane(frameContent);
frameContent.setBackground(Color.black);
frameContent.setLayout(new BoxLayout(frameContent, BoxLayout.Y_AXIS));
setUndecorated(true);
addMouseMotionListener(this);
addMouseListener(this);
JButton testButton = new JButton("TEST");
JButton testButton2 = new JButton ("TEST2");
frameContent.add(testButton);
frameContent.add(Box.createVerticalGlue());
frameContent.add(testButton2);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
public void mouseMoved(MouseEvent e)
Point p = e.getPoint();
if (p.y > e.getComponent().getSize().height - 5)
setCursor( Cursor.getPredefinedCursor( Cursor.N_RESIZE_CURSOR ));
else
setCursor( Cursor.getPredefinedCursor( Cursor.DEFAULT_CURSOR));
public void mouseDragged(MouseEvent e)
Point p = e.getPoint();
int compWidth = getSize().width;
if (getCursor().getType() == Cursor.N_RESIZE_CURSOR)
int nextHeight = compStartHeight+p.y-sp.y;
if (nextHeight > minHeight)
setSize(compWidth,nextHeight);
setVisible(true);
else
int x = getX()+p.x-sp.x;
int y = getY()+p.y-sp.y;
setLocation(x,y);
public void mousePressed(MouseEvent e)
sp = e.getPoint();
compStartHeight = getSize().height;
public void mouseEntered(MouseEvent e)
public void mouseExited(MouseEvent e)
if (sp == null)
setCursor( Cursor.getPredefinedCursor( Cursor.DEFAULT_CURSOR));
public void mouseClicked(MouseEvent e)
public void mouseReleased(MouseEvent e)
sp = null;
public static void main(String[] args)
new TestFrame();
} -
nice day,
during rezize JFrame simultaneously changing the size of JFrame Childs, how to stop, pause or wait for that and resize JFrame Childs just one time
import java.awt.BorderLayout;
import java.awt.Dimension;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.border.EmptyBorder;
public class PaintPanels extends JFrame {
private static final long serialVersionUID = 1L;
private final JPanel fatherPanel = new JPanel();
private SomePanel centerPanel;
private SomePanel northPanel;
private SomePanel southPanel;
public void makeUI() {
centerPanel = new SomePanel();
northPanel = new SomePanel();
southPanel = new SomePanel();
centerPanel.setName("centerPanel");
northPanel.setName("northPanel");
southPanel.setName("southPanel");
northPanel.setPreferredSize(new Dimension(1020, 170));
centerPanel.setPreferredSize(new Dimension(1020, 300));
southPanel.setPreferredSize(new Dimension(1020, 170));
fatherPanel.setLayout(new BorderLayout(5, 5));
fatherPanel.setBorder(new EmptyBorder(5, 5, 5, 5));
fatherPanel.add(northPanel, BorderLayout.NORTH);
fatherPanel.add(centerPanel, BorderLayout.CENTER);
fatherPanel.add(southPanel, BorderLayout.SOUTH);
setLayout(new BorderLayout(5, 5));
setDefaultCloseOperation(EXIT_ON_CLOSE);
add(fatherPanel, BorderLayout.CENTER);
pack();
setVisible(true);
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new PaintPanels().makeUI();
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.BorderFactory;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class SomePanel extends JPanel {
private static final long serialVersionUID = 1L;
private GradientPanel titlePanel;
protected JLabel titleLabel;
int borderOffset = 2;
public SomePanel() {
setLayout(new BorderLayout(5,5));
setBorder(BorderFactory.createLineBorder(Color.gray, 1));
addMouseListener(new MouseListener() {
@Override
public void mouseClicked(MouseEvent e) {
Component comp = e.getComponent();
String compName = comp.getName();
System.out.print("Mouse click from " + compName + "\n");
@Override
public void mousePressed(MouseEvent e) {
@Override
public void mouseReleased(MouseEvent e) {
@Override
public void mouseEntered(MouseEvent e) {
@Override
public void mouseExited(MouseEvent e) {
titleLabel = new JLabel(" Welcome World ", JLabel.LEADING);
titleLabel.setForeground(Color.darkGray);
titlePanel = new GradientPanel(Color.black);
titlePanel.setLayout(new BorderLayout());
titlePanel.add(titleLabel, BorderLayout.WEST);
titlePanel.setBorder(BorderFactory.createEmptyBorder(borderOffset, 4, borderOffset, 1));
titlePanel.setBorder(BorderFactory.createLineBorder(Color.lightGray));
titlePanel.setMinimumSize(new Dimension(300, 25));
titlePanel.setPreferredSize(new Dimension(800, 25));
titlePanel.setMaximumSize(new Dimension(1200, 25));
add(titlePanel, BorderLayout.NORTH);
import java.awt.Color;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Paint;
import javax.swing.JPanel;
class GradientPanel extends JPanel {
private static final long serialVersionUID = 1L;
public GradientPanel(Color background) {
setBackground(background);
@Override
public void paintComponent(Graphics g) {
super.paintComponent(g);
if (isOpaque()) {// Color controlColor = UIManager.getColor("control");
//Color background = new Color(44, 61, 146);
//Color controlColor = new Color(168, 204, 241);
Color background = new Color(168, 210, 241);
Color controlColor = new Color(230, 240, 230);
int width = getWidth();
int height = getHeight();
Graphics2D g2 = (Graphics2D) g;
Paint oldPaint = g2.getPaint();
g2.setPaint(new GradientPaint(0, 0, background, width, 0, controlColor));
//g2.setPaint(new GradientPaint(0, 0, getBackground(), width, 0, controlColor));
g2.fillRect(0, 0, width, height);
g2.setPaint(oldPaint);
}nice day,
could you hepl me with some definitions, still I can't to define gap for first and last of JLabel (matrix), is there some hack for GridBagLayout,
hmmm, interesting that if I replace South JPanel and put there JPanet that contains only JButtons, then that's/just only this one (JPanel) doesn't any problems with synchronizations for repaint with JFrame,
result is: resize isn't smooth, Border jump, resize breaking,
already at a fraction of JComponents that I would like to display,
I certainly know that the reason is the LCD display, where its native resolution makes a huge problem with the edge of Border and FontSize, 'glass screen' doesn't suffering from similar diseases,
so there my question is how to stop the refresh, resize JPanels with its parents, therefore wait until the resize event ends on JFrame
import java.awt.*;
import javax.swing.*;
public class ChildPanel extends JPanel {
private static final long serialVersionUID = 1L;
public ChildPanel() {
JLabel hidelLabel;
JLabel firstLabel;
JTextField firstText;
setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
setComponentOrientation(ComponentOrientation.LEFT_TO_RIGHT);
for (int k = 0; k < 50; k++) {
hidelLabel = new JLabel(" ");
//hidelLabel.setBorder(BorderFactory.createLineBorder(Color.BLACK, 1));
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.weightx = 0.5;
gbc.weighty = 0.5;
gbc.gridx = k;
gbc.gridy = 0;
add(hidelLabel, gbc);
for (int k = 0; k < 5; k++) {
firstLabel = new JLabel("Testing Label : ", SwingConstants.RIGHT);
firstLabel.setFont(new Font("Serif", Font.BOLD, 20));
firstLabel.setBorder(BorderFactory.createLineBorder(Color.BLACK, 1));
gbc.fill = GridBagConstraints.HORIZONTAL;
//gbc.ipady = 0; //reset to default
//gbc.weighty = 1.0; //request any extra vertical space
//gbc.anchor = GridBagConstraints.PAGE_END; //bottom of space
gbc.insets = new Insets(0, 0, 5, 0); //top padding
gbc.gridx = 0; //aligned with JLabel 0
gbc.gridwidth = 8; //8 columns wide
gbc.gridy = k + 1;
add(firstLabel, gbc);
for (int k = 0; k < 5; k++) {
firstText = new JTextField("Testing TextField");
firstText.setFont(new Font("Serif", Font.BOLD, 20));
firstText.setBorder(BorderFactory.createLineBorder(Color.BLACK, 1));
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.insets = new Insets(0, 0, 5, 0);
gbc.gridx = 9;
gbc.gridwidth = k + 8;
gbc.gridy = k + 1;
add(firstText, gbc);
for (int k = 0; k < 5; k++) {
firstLabel = new JLabel("Testing Label : ", SwingConstants.RIGHT);
firstLabel.setFont(new Font("Serif", Font.BOLD, 20));
firstLabel.setBorder(BorderFactory.createLineBorder(Color.BLACK, 1));
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.insets = new Insets(0, 0, 5, 0);
gbc.gridx = 20 + k;
gbc.gridwidth = 8;
gbc.gridy = k + 1;
add(firstLabel, gbc);
for (int k = 0; k < 5; k++) {
firstText = new JTextField("Testing TextField");
firstText.setFont(new Font("Serif", Font.BOLD, 20));
firstText.setBorder(BorderFactory.createLineBorder(Color.BLACK, 1));
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.insets = new Insets(0, 0, 5, 0);
gbc.gridx = 29 + k;
gbc.gridwidth = 21 - k;
gbc.gridy = k + 1;
add(firstText, gbc);
import java.awt.*;
import javax.swing.JPanel;
class GradientPanel extends JPanel {
private static final long serialVersionUID = 1L;
public GradientPanel(Color background) {
setBackground(background);
@Override
public void paintComponent(Graphics g) {
super.paintComponent(g);
if (isOpaque()) {
Color background = new Color(168, 210, 241);
Color controlColor = new Color(230, 240, 230);
int width = getWidth();
int height = getHeight();
Graphics2D g2 = (Graphics2D) g;
Paint oldPaint = g2.getPaint();
g2.setPaint(new GradientPaint(0, 0, background, width, 0, controlColor));
g2.fillRect(0, 0, width, height);
g2.setPaint(oldPaint);
} -
Hi all,
I used BorderLayout in JPanel. I have added JTextArea at CENTER and JList at EAST.
Jpanel is in JFrame.
The size of JList is depend on Element that longest but when I remove all element and try to
resize JFrame, the JList which has no element extend its size to half of frame.
The point is How can I set size of Jlist to extend depending on Frame size.
Or Can I fix the size of Jlist in BorderLayout.
Help...pleaseSizing problems can usually be solved by setting the correct preferred, minimum and maximum size.
In your case try to set the maximumSize to a very big one (e.g. 32678, 32768)
If that still doesn't help you might want to look into a different LayoutManager.
Thomas -
Problem with JFrame resizing at runtime
Hi All,
I have a problem with resizing the JFrame at runtime. Even if i resize the JPanel. It is not affection on all the components over the frame. How can i solve that I am using AbsoluteLayout(jre1.6) and here i am going to provide you code snippet. My requirement is to resizt the form. If form is small in size then all the component should also be according tothe size of the form.
public void initComponents(int size) {
if(size >= 50) {
x_co_or = 300;
y_co_or = 300;
} else if(size < 50) {
x_co_or = 200;
y_co_or = 200;
jPanel1 = new javax.swing.JPanel();
jButton1 = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
getContentPane().setLayout(new org.netbeans.lib.awtextra.AbsoluteLayout());
jPanel1.setLayout(new org.netbeans.lib.awtextra.AbsoluteLayout());
jButton1.setText("jButton1");
jPanel1.add(jButton1, new org.netbeans.lib.awtextra.AbsoluteConstraints(40, 40, 110, 40));
getContentPane().add(jPanel1, new org.netbeans.lib.awtextra.AbsoluteConstraints(0, 0, x_co_or, y_co_or));
pack();
Can anybody suggest any idea/solution.
Any idea/solution are most welcome.
Regards,
Pradeep DubeyHow can i solve that I am using AbsoluteLayout(jre1.6)
and here i am going to provide you code snippet.no need for the snippet, you're using absolute positioning, which means you're responsible for location and size on every single change.
start coding now, take about a week, or you could use a layout manager, take maybe, 5 minutes -
How to resize a custom tree node like you would a JFrame window?
Hello,
I am trying to resize a custom tree node like you would a JFrame window.
As with a JFrame, when your mouse crosses the Border, the cursor should change and you are able to drag the edge to resize the node.
However, I am faced with a problem. Border cannot detect this and I dont want to use a mouse motion listener (with a large number of nodes, I fear it will be inefficient, calculating every node's position constantly).
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Insets;
import java.util.EventObject;
import javax.swing.BorderFactory;
import javax.swing.Box;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellEditor;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreeSelectionModel;
public class ResizeNode extends JPanel {
AnilTreeCellRenderer2 atcr;
AnilTreeCellEditor2 atce;
DefaultTreeModel treeModel;
JTree tree;
DefaultMutableTreeNode markedNode = null;
public ResizeNode() {
super(new BorderLayout());
treeModel = new DefaultTreeModel(null);
tree = new JTree(treeModel);
tree.setEditable(true);
tree.getSelectionModel().setSelectionMode(
TreeSelectionModel.SINGLE_TREE_SELECTION);
tree.setShowsRootHandles(true);
tree.setCellRenderer(atcr = new AnilTreeCellRenderer2());
tree.setCellEditor(atce = new AnilTreeCellEditor2(tree, atcr));
JScrollPane scrollPane = new JScrollPane(tree);
add(scrollPane,BorderLayout.CENTER);
public void setRootNode(DefaultMutableTreeNode node) {
treeModel.setRoot(node);
treeModel.reload();
public static void main(String[] args){
ResizeNode tb = new ResizeNode();
tb.setPreferredSize(new Dimension(400,200));
JFrame frame = new JFrame("ResizeNode");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setContentPane(tb);
frame.setSize(400, 200);
frame.pack();
frame.setVisible(true);
tb.populate();
private void populate() {
TextAreaNode2 r = new TextAreaNode2(this);
setRootNode(r);
TextAreaNode2 a = new TextAreaNode2(this);
treeModel.insertNodeInto(a, r, r.getChildCount());
class AnilTreeCellRenderer2 extends DefaultTreeCellRenderer{
TreeBasic panel;
DefaultMutableTreeNode currentNode;
public AnilTreeCellRenderer2() {
super();
public Component getTreeCellRendererComponent
(JTree tree, Object value, boolean selected, boolean expanded,
boolean leaf, int row, boolean hasFocus){
TextAreaNode2 currentNode = (TextAreaNode2)value;
NodeGUI2 gNode = (NodeGUI2) currentNode.gNode;
return gNode.box;
class AnilTreeCellEditor2 extends DefaultTreeCellEditor{
DefaultTreeCellRenderer rend;
public AnilTreeCellEditor2(JTree tree, DefaultTreeCellRenderer r){
super(tree, r);
rend = r;
public Component getTreeCellEditorComponent(JTree tree, Object value,
boolean isSelected, boolean expanded, boolean leaf, int row){
return rend.getTreeCellRendererComponent(tree, value, isSelected, expanded,
leaf, row, true);
public boolean isCellEditable(EventObject event){
return true;
class NodeGUI2 {
final ResizeNode view;
Box box = Box.createVerticalBox();
final JTextArea aa = new JTextArea( 1, 5 );
final JTextArea aaa = new JTextArea( 1, 8 );
NodeGUI2( ResizeNode view_ ) {
this.view = view_;
box.add( aa );
aa.setBorder( BorderFactory.createMatteBorder( 0, 0, 1, 0, Color.GREEN ) );
box.add( aaa );
box.setBorder( BorderFactory.createMatteBorder( 5, 5, 5, 5, Color.CYAN ) );
private Dimension getEditorPreferredSize() {
Insets insets = box.getInsets();
Dimension boxSize = box.getPreferredSize();
Dimension aaSize = aa.getPreferredSize();
Dimension aaaSize = aaa.getPreferredSize();
int height = aaSize.height + aaaSize.height + insets.top + insets.bottom;
int width = Math.max( aaSize.width, aaaSize.width );
if ( width < boxSize.width )
width += insets.right + insets.left + 3; // 3 for cursor
return new Dimension( width, height );
class TextAreaNode2 extends DefaultMutableTreeNode {
NodeGUI2 gNode;
TextAreaNode2(ResizeNode view_) {
gNode = new NodeGUI2(view_);
}the node on the tree is only painted on using the
renderer to do the painting work. A mouse listener
has to be added to the tree, and when moved over an
area, you have to determine if you are over the
border and which direction to update the cursor and
to know which way to resize when dragged. One of the
BasicRootPaneUI has some code that can help determine
that.Thanks for replying. What is your opinion on this alternative idea that I just had?
I am wondering if it might be easier to have a toggle button in the node that you click when you want to resize the node. Then a mouse-down and dragging the mouse will resize the node. Mouse-up will reset the toggle button, and so will mouse down in an invalid area.
Anil
Maybe you are looking for
-
I can not open PDF files in mail on iPhone 6plus
hhas anyone had a problem opening PDF files in mail. I get a grey screen
-
I recently reinstalled restored my Toshiba laptop with Windows 8 to factory condition. I reinstalled iTunes, and now when I try to play a movie, I get this error message: "To play (name of movie) you must have a PC with built-in display or have it
-
HOW DO YOU GUYS DEAL WITH APPLE.. SO CONFUSING...NEED HELP WITH SPECS FOR PURCHASE OF IMAC 21.5
Hi guys, been reading your forums, blogposts, etc and am getting more confused. I'm just a video girl trying to produce meaningful content through web videos for small to mid sized businesses and want to come over from the dark side. Good news,, I
-
Hi, We have a consumer proxy that was created with class interfaces in ABAP. This did not follow the traditional message interface from ESR. The integration of this consumer proxy is through PI to a .net Webservice through SOAP adapter. Since the con
-
Adding second s-ata raid 0 for windows fix!
Hi , i need some help i have a problem on win xp prosp1 , it doesn´'t start because it missed or corrupted the windows\system32\config\system file....and i cant used the recupertaion console so ...i have a socond system with the same configurations a