Swing/AWT/SWT :: JLists Are Not Appearing In JPanel

Apr 12, 2015

I need to add 2 JLists inside a JPanel for a crossword. The JPanel is located SOUTH and I'm using BorderLayout in the constructor to locate the JPanel.

The problem is, I can't see the 2 JLists inside the JPanel. For some strange reason the JLists appear in the center where the crosswordPanel is, even though the clues JPanel method is located SOUTH.

package crossword;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;

[code]....

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JButtons Not Appearing In JPanel

Apr 17, 2014

I want to add a "play" and a "stop" button to stop and play a sound file. Sound file works good, but buttons aren't appearing in the window.

public class SpelaLjud extends JPanel implements ActionListener {
JButton bPlay, bStop;
AudioClip ac;
public SpelaLjud() {
bPlay = new JButton ("PLAY");
bStop = new JButton ("STOP");
add(bPlay);
add(bStop);
bPlay.addActionListener(this);
bStop.addActionListener(this);

[code]....

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Applets :: 2 Jlists / Second One Depends On Selection In First One?

Jun 2, 2014

So I have an applet and in the first ScrollPane you have a number of options of businesses

The Centre

IMAX

etc ..

and when you click one , the other scrollpane shows office

so when i choose "The Centre" for example , in the right scrollpane it shows : "Head Str." "Downtown" etc

i can fill in the first scrollpane with:

void myInit() {
DefaultListModel model = (DefaultListModel)businessList.getModel();
model.removeAllElements();
try {
ArrayList<Business> bussinesses = contr.getBusiness();

[code]....

but this gives me a NullPointerException on

ArrayList<Office> offices= business.getOffices(name);

which i don't understand, since business isn't null .. it's the selected value.

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Swing/AWT/SWT :: JInternalFrame Over JPanel

Oct 3, 2014

I would like to know the possible ways to put up JInternalFrame over JPanel to achieve the following output.

Is it even Possible because i learned JInternalFrame can only be added to JDesktopPane.?

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Swing/AWT/SWT :: Image Not Being Displayed In Jpanel

Feb 19, 2014

Trying to get an image to display in a GUI.

try {
ByteArrayInputStream in = new ByteArrayInputStream(
transferWorker.bOutput
.toByteArray());
BufferedImage bufferedImage = ImageIO
.read(in);

[Code] ....

But nothing is happening in the GUI. I have stepped through and bufferedimage contains the data, but its not being displayed. Whats happening is, an image is being transmitted to serial port of laptop, so i'm taking it in and storing it in a BufferOutputStream and then trying to open it in my GUI class.

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Swing/AWT/SWT :: JPanel Inside A Jframe?

Apr 9, 2014

I have a Jframe and i want to add inside 4 different jpanel.This is easy.

what is difficult is how can i change them dynamically with 4 other new jpanels and 4 other new jpanels?

I have try with BorderLayout but not working.

It's a wizard like but not the same.

I have a jpanel with jbuttons jpanel with a jtable jpanel with textarea and jpanel with jlabels. All this have to change with other 4 jpanels, where to look?

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Swing/AWT/SWT :: How To Call PaintComponent In JPanel

Nov 7, 2014

How can I make a call to paintComponent within the JPanel-class, from another Class?

In class TestClass:

public class TestClass {
public TestClass() {
JFrame frame = new JFrame();
frame.setLayout(new BorderLayout());
frame.setSize(500,500);
initComponents();

[Code] .....

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Swing/AWT/SWT :: Scrollable JPanel Using MigLayout

Dec 28, 2014

I have been trying to create a chat client which makes use of a scrollable jpanel and at runtime adds JTextFields to the panel.

Panel Initialising

msgPanel = new JPanel(new MigLayout());
msgPanel.setPreferredSize(new Dimension(400,335));
JScrollPane msgPanelScroll = new JScrollPane(msgPanel);
msgPanelScroll.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
msgPanelScroll.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED);
mainPanel.add(msgPanelScroll,"span 3,alignx center,wrap");

[Code] .....

But now Im facing the following issues. The text field aligns to the center of the panel & on adding more fields the panel accommodates as it can and does not begin scrolling.

Screenshots attatched

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Swing/AWT/SWT :: Why Jpanel Is Not Inserted In Jframe

Apr 4, 2014

I pick this code from Head first Java

package GUI;
import javax.swing.JFrame;
import javax.swing.JPanel;
import java.awt.Graphics;
import java.awt.Color;
public class gui5 {
int x=0;
int y=0;
public static void main(String... x) {

[code]...

but just a Jframe is appearing no Jpanel no green color circle?What is wrong with code

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Swing/AWT/SWT :: Cannot Instantiate JPanel And Add It To JFrame

Mar 27, 2014

I am try to do an application based in multiples JFrames, each one with its particular responsibilities, and use one JPanel as a menu with buttons that connect one JFrame to another, But this menu is instantiated at run in view (layout made by netbeans) the Main Jframe appears with its internal JPanel, but the instantiated JPanel does not appear or does not show it's buttons. (notice only run method in the second class):

JPanel Menu that will be used in all alone JFrames of application:

public class MenuSuperior extends javax.swing.JPanel {
public MenuSuperior() {
initComponents();
} private void initComponents() {

[Code] .....

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Swing/AWT/SWT :: Disabling JPanel And All Its Components?

Oct 8, 2001

Let me explain by simplifying the GUI to a simple frame in which I have a JCheckbox and a JPanel mypanel.mypanel has a Textfield tf,JComboBox cmb as it's components.So now if I deselect the JCheckbox, all the components in the mypanel should be disabled. I used a code like:

[code]mycheckbox.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
if(mycheckbox.isSelected())
mypanel.setEnabled(true); else
mypanel.setEnabled(false); } });[code]

but the components inside the panels are not disabled. In my actual program I have a large number of different kinds of components in mypanel.So disabling/enabling each of them on each actionPerformed of the mycheckbox will be laborious. Isn't there any way by which I can disable/enable the mypanel to disable/enable all the components in it?

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Swing/AWT/SWT :: JPanel In JFrame - Components Do Not Appear

Apr 4, 2014

I trying to replace original (and empty) JPanel in JFrame with my own made one, components does no appear right, when I pass the mouse first button appears:

MainViewClass:
...
private void initComponents() {
...
MenujPanel = new MenuSuperior();
MenujPanel.setBorder(
BorderFactory.createTitledBorder("Dados Pessoais"));

[Code] .....

Here is the video:

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Swing/AWT/SWT :: Putting Button In JPanel

Jul 3, 2014

I am trying to add buttons in a loop to my but when i compile my program i can`t see my buttons. I can see other stuff that added to jpanel ...

static JButton blocks[][];
for (int i = 0; i < block.length; i++) {
for (int j = 0; j < block[i].length; j++) {
block[i][j] = new Block(i, j);
blocks[i][j] = new JButton(i+"");
blocks[i][j].setLayout(new GridLayout((i+1) * 10, (i+1) * 10, 10, 10));
pageAxisPanel.add(blocks[i][j]);
}
}

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Swing/AWT/SWT :: How To Render String In JPanel

Jun 4, 2014

I have used the following code and I am trying to render a String in the JPanel. The text is getting displayed in the mirror image format.

I understand that there is a problem with .scale(), not able to get an idea about the corrective step. Please run the below class.

class Surface extends JPanel {
final int PAD = 40;
private void doDrawing(Graphics g)
{
Graphics2D g2d = (Graphics2D) g.create();
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);

[Code] ....

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Swing/AWT/SWT :: How To Disable Entire Jpanel And All Its Contents

Oct 23, 2014

I'd like to enable/disable a jpanel and it's entire contents in one fell swoop. I could of course call each component's .setEnabled() method, but I figured there must be a better way!

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Swing/AWT/SWT :: Automatic Resizing Of JPanel In JFrame?

Jan 29, 2015

I have created a JFrame that contains 3 JPanel.

My problem is, when i clicked in the bouton to expand the Frame,the 3 JPanel are fixed and do not expanded with the Jframe.

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Swing/AWT/SWT :: Resize JPanel Vertically Instead Of Inner Components?

Jan 10, 2014

My JPanel when adding components to it will never make its self larger but it will make my components inside smaller even though I have set the minimum and preferred sizes for those components? I am using the GridBagLayout for my layout manager as I am trying to get used to it.

package manning;

import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GridBagConstraints;

[code]....

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Swing/AWT/SWT :: Deleting Shape Drawn On JPanel

Apr 7, 2015

I want to delete the shape i have drawn on the panel. Here is my code

import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Shape;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.geom.Rectangle2D;

[Code] ....

Why it is not deleting my rectangle.

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Swing Program - Adding JPanel To JScrollPane

Dec 9, 2014

I'm writing a Java Swing program for my software development class to allow a user to create a map for a side scroller video game. I'm stuck on a particular part of my GUI where I'm trying to create a properties box for specific tiles. When I draw the components onto the JPanel and display it as it is, it shows two check boxes per row. On the ScrollPane however, all the check boxes go straight onto one line and draw out the scroll pane. Right now I am only concerned with just making the basic GUI.

Here is what I have so far:

Within the main class, I am creating the JFrame and adding components to it. I am attempting to create a JScrollPane which will hold the properties check boxes...

Here is the method where I am implementing the code. It works, but it doesn't display correctly.

private void createPropertiesBox() {
PropertiesBoxPanel pbp = new PropertiesBoxPanel();
propertiesBox = new JScrollPane(pbp);
propertiesBox.setViewportView(pbp);
frame.add(propertiesBox);

[Code] .....

I've been tinkering with this code for quite some time now and I cannot seem to make a breakthrough on how to fix this.

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Swing/AWT/SWT :: Why JSeperator Is Shown With Extra Space On JPanel

May 4, 2015

there is a main JPanel in my application in that main JPanel i want to add two JPanels with a seperator in between . Though i have added the seperator but its taking some extra space and when i am changing its size , there is no effect . how can i remove/reduce this extra space taken by JSeperator? below is view logic ,

mainPanel = new JPanel(new GridLayout());
jp = new JPanel(new GridLayout(8, 2, 5, 5));
jp2 = new JPanel(new GridLayout(8, 1, 5, 5));
jText = new JTextField(10);
jText2 = new JTextField(10);
jText3 = new JTextField(10);

[code]....

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Swing/AWT/SWT :: How To Update / Refresh JPanel On JButton Click

Apr 14, 2015

I am trying to plot a graph and graph should display when JButton is clicked. To create data set, I am taking some value through JTextField and then created a chart and plotted it. I've got a problems: the chart doesn't refresh/update when I change the text field value.

public class Test2 extends JFrame {
/**
*
*/
private static final long serialVersionUID = 1L;
private JPanel contentPane;
private ChartPanel chartPanel;
private JTextField textField_1;
double a;

[Code] ....

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Swing/AWT/SWT :: Add Buttons Dynamically In A New Jpanel On Click Of A Button

Jun 20, 2014

Am trying to add buttons dynamically in a new Jpanel on click of a button. i am getting new Jpanel but not able to see the buttons.

btnNewButton_1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if((!(playerFirst.getText().equalsIgnoreCase("") ||playerSecond.getText().equalsIgnoreCase(""))&&(!playerFirst.getText().equalsIgnoreCase(playerSecond.getText())) ) ){
//unoGameController.playGame(playerFirst.getText(), playerSecond.getText());
CardLayout cardLayout=(CardLayout)(frmUno.getContentPane().getLayout());

[Code]...

prepareHandsForGuiCode is

public UNODeckMain prepareHandsForGui(UNODeckMain unoDeckMain){
JButton[] btnArr =new JButton[50];
for(int i=0;i<50;i++){
btnArr[i]=new JButton("hi");
panel_player1.add(btnArr[i]);
}return unoDeckMain; }

Am i skipping something ?

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Swing/AWT/SWT :: Drawings In JPanel Disappears After Scrolling Scrollpane

Jan 15, 2014

I am having problems trying to get my jPanel to display my drawings properly after scrolling. (My drawings is done using by overriding the paint() method as the paintComponent() method does not work in my case.) My jPanel is component of my JScrollpane, and my JScrollpane is part of my jFrame.

The organization of components is: JFrame <-- JScrollPane <-- JPanel ( <-- means added to).

Situation: My drawings did appear when the frame becomes start, but when I start scrolling the scrollbar in any direction, it starts to eat up my drawing leaving only part of drawing which is not affected by scrolling.

I want my jpanel to display the drawing properly even after scrolling in both vertical and horizontal directions. I did use revalidate and repaint methods in my method for start of the JFrame.

Some Ways which I have tried:

1) I have tried adding this.revalidate() and this.repaint() method to the paint() method which did retains the image, but the jPanel keeps blinking on my screen which is trying attempt to update the drawing in a recursive manner.

2) I have tried panel.repaint() and panel.revalidate() in my paint() method, but it did not display my drawing.

3) I have read from other sources that I needed a listener to do it, but I am not sure how it works.

// Code Use for Listener
jScrollPane1.getViewport().addChangeListener(new ListenAdditionsScrolled());
public class ListenAdditionsScrolled implements ChangeListener {
public void stateChanged(ChangeEvent e) {
jPanel3.revalidate();
jPanel3.repaint();
}
}

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Swing/AWT/SWT :: JTable In JScrollPane Not Filling Space In JPanel

Feb 5, 2015

I have a problem with the size of my scrollPane. It won't fill the space in the JPanel.

is there a way to let the scrollPane fill the whole space?

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Swing/AWT/SWT :: Revalidate Is Resetting JTextArea Position On JPanel

Nov 3, 2014

So, I have a program that allows me to dynamically add JTextAreas and then drag them around the screen. The problem is, when I add a new JTextArea, I call revlidate() to update the panel. This causes all of the JTextAreas to reset their positions. How can I prevent this from happening? It is happening on this code:

public void addBox() {
drag = new DragListener();
JTextArea textArea2 = new JTextArea("Some text
Some other text");
textArea2.setLineWrap(true);
textArea2.setWrapStyleWord(true);

[Code] .....

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Swing/AWT/SWT :: Loading SVG Images On JPanel With Transparent Background

Mar 27, 2014

I'm working on loading SVG images on Jpanel using "Apache(tm) Batik SVG Toolkit" , but after the image get loaded it has "white background" and "not transparent" one like PNG images.

I checked "fill" of rect attribute on the xml file of the svg image and it was correctly set to none, I also Tested the image on html document and it was trasparent, but in my java app it has white background.

The Question is there any way to load SVG images with transparent background on Jpanel ?

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