Swing/AWT/SWT :: Panel Not Showing Added Components

Apr 27, 2014

My panel named panelIncomeInfo are not showing the components that I have added.

public class PayrollGUI {
private JPanel panelIncomeInfo = new JPanel ();
private JPanel panel = new JPanel ();
private JPanel panelPayCheckInfo = new JPanel ();
private JButton close = new JButton ("Close");

[Code] .....

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Swing/AWT/SWT :: Panel Doesn't Refresh When New Component Added If Smaller Than Largest Visible Component

Jan 26, 2014

I have a JPanel that's using a simple GridBagLayout.

JPanel panel = new JPanel();
GridBagLayout qPanelLayout = new GridBagLayout();
qPanelLayout.columnWidths = new int[] { 0 };
qPanelLayout.rowHeights = new int[] { 0 };
qPanelLayout.columnWeights = new double[] { Double.MIN_VALUE };
qPanelLayout.rowWeights = new double[] { 0.0 };
panel.setLayout(qPanelLayout);
componentCount = 0;

Based on user input I am adding sub-panels to the panel. These sub-panels may vary in height. They take up the full width of the Panel.

public void add(Component comp) {
GridBagConstraints gbc = new GridBagConstraints();
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.insets = new Insets(2,2,2,2);
gbc.gridx = 0;
gbc.gridy = componentCount++;
panel.add(comp, gbc_questionPane1);
}

The odd behaviour I'm seeing is that if the height of the new sub-panel I'm adding is less than the height of the largest sub-panel currently displayed then the main panel does not repaint. If its height is equal or greater then the Panel does repaint, and any sub-panels that were added but not visible before are now painted. What have I missed?

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Why JFrame Not Showing Components Such As JComboBoxes

Sep 4, 2014

my JFrame is not showing anything, (Perhaps test it in your own IDE on your own PCs/laptop)

// Project: RestaurantBillCalculator.java Calculates a table's bill.
 
// Import statements for different classes
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.JButton;
import javax.swing.JComboBox;

[code]....

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Adding Multiple Components To 1 Single Frame / Panel

Apr 15, 2014

Title says it all i want to get these two components:

Java Code:

package TestVersion;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;

import javax.swing.JPanel;

public class GameWorld extends JPanel {

private int charX = 225;
private int charY = 225;
private int charDiameter = 25;

[code]...

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Button Not Showing On Panel?

Jan 27, 2014

I have three classes.. 1. panel class 2. frame class and 3. tester class...I am creating the objects like so but when I add button to panel then panel to frame I am not seeing the button. here is my code

import javax.swing.JButton;
import javax.swing.JPanel;
public class Panel extends JPanel{
private JPanel p;
private JButton b;

[code]....

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Swing/AWT/SWT :: When Click On Button From Bottom Panel Top Panel Need To Be Redrawn

Apr 1, 2014

When i click on the button from bottom panel, top panel need to be redrawn. But redrawing is not happening. It happens only when resizing the applet.

public class Graphics_Chart(){
public init(){
JScrollPane topPane = new JScrollPane(new ImagePanel2());
topPane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
topPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_NEVER);

[code]...

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Swing/AWT/SWT :: Why Must All Components In A Container Have The Same Alignment

Dec 10, 2014

I have a JPanel with vertical BoxLayout. It contains four components. I set the JPanel to LEFT_ALIGNMENT, which has no effect on its components. I set the first component to LEFT_ALIGNMENT, which has no effect. Only after I have set all four components to LEFT_ALIGNMENT do any of them align properly.

This suggests that it is impossible to have varying alignments in a container. They must all be the same alignment.

I accept that this is just the way things are: "Java works in mysterious ways." And I'm sure that it is possible to work around this limitation by stacking boxes that themselves have different internal alignments.

But I still wonder what in the world was going on in the minds of the Java developers. Is there a rational reason for this oddity?

This raises my most serious criticism of Swing: the hidden gotcha. Swing is a tangled mess of cross-connecting requirements that are impossible to divine by simple inspection of the documentation. If you want to use, say, a JRadioButton, it's not enough to study the documentation on JRadioButtons; you must also consult lots of documents for which there is no obvious connection to JRadioButton other than it being part of Swing.

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Swing/AWT/SWT :: How To Serialize Java Components

Mar 9, 2015

I am trying to send a JPanel object to the server. While doing so I get the error -

java.io.NotSerializableException: javax.swing.filechooser.WindowsFileSystemView
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)

[code]....

How to fix this error?

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Swing/AWT/SWT :: Auto Resize Components

Sep 5, 2014

I have swing UI designed and I want the components to resize when the frame is manually resized. The design is as shown in the fig Project UI.jpg

The panel 4 and panel 5 will change their contents according to the list item clicked. Panel 4 just has text area but panel 5 a panel with numerous components as label, combo box, text field,check box will be present.Now if the frame resizes, I won't all the components to resize according to the frame size.

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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 :: What Are Parent And Child Components

Aug 11, 2014

I keep hearing these two term when it comes to painting in Swing, however, I'm not sure which is which. To my understanding is that the child components are the ones that already exist on screen (could be a JButton, JFrame, or custom painting) . and the parent components are the one to be added/drawn next. (hence, if we override the paintChildren() method when painting, the components that were already on the screen don't appear any more).

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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 :: Aspect Ratio Of Components

Aug 18, 2011

Any good way to keep a certain aspect ratio of a Component, when the Container is resized?

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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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Painting In Swing - Parent And Child Components?

Aug 11, 2014

I keep hearing these two term when it comes to painting in Swing, however, I'm not sure which is which. To my understanding is that the child components are the ones that already exist on screen (could be a JButton, JFrame, or custom painting) . and the parent components are the one to be added/drawn next. (hence, if we override the paintChildren() method when painting, the components that were already on the screen don't appear any more) ....

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Swing/AWT/SWT :: Progress Bar Dialog Sometimes Doesn't Display Components

Mar 7, 2014

I wish to display a progress bar during a lengthy file translation process. When I created a ProgressBar class to do this and tested it with a short test program, it seemed to work fine. But when I add my ProgressBar class to a package containing various other classes, put that package in a jar file, and then execute the class using the progress bar from a menu in my main program, the frame of the progress bar shows up with the appropriate caption but the JLabel, JProgressBar, and JButton are not displayed. I have gone over my code numerous times and checked that the ProgressBar class constructor is getting the proper arguments.

// package gov.nasa.jpl.ephemeris;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
/**
* Progress bar with message text above the bar and a Cancel button below it
*/
public class ProgressBar extends JFrame {
private boolean _cancelled = false;
private JProgressBar _progressBar = null;

[Code] ....

I have also been wondering whether I need a separate instance of the border for each panel, or whether I can just create one instance and use it for all three panels.

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Swing/AWT/SWT :: Screen Resolution - Components Adjustment And Alignment

Mar 30, 2015

I'm working on Ubuntu with resolution 1600*900; I used MigLayout to place the components of the application; but when I go with higher resolutions,components adjustment and alignment are not up to the mark.

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Swing/AWT/SWT :: Can't Get Gridbag Layout Components To Display As Required

May 4, 2014

I have quite a specific view for how I want my components layed out. No matter what I try I can get them to display how I want! I'm using three JPanels. There's a main panel that goes inside the tabbed pane. This main panel contains two other panels. The First panel is a gridbaglayout panel, with labels on the left column, and components on the right column. The second panel is underneath the second, and contains a label, and a button beneath it. THis uses a basic box layout, with one component per line. The label doesn't always appear (depends if a component is changed). With everything showing, this is how it looks so far:

However, I want the Labels on the left of the pane. The right hand column should be aligned horizontally and have more space from the labels. Ideally I'd like a gap between the last label/checkbox and the Note label.

This is my current code for the panel/s inside the tabbed pane window.

videoPanel = new JPanel();
applyVidBtn = new JButton("Apply Settings");
applyVidBtn.setVisible(false);
warningLbl = new JLabel("Note. Applying these settings causes a program restart.");
warningLbl.setVisible(false);

[Code] .....

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Swing/AWT/SWT :: Showing Dotted Line

Jul 7, 2014

Is it possible for a rectangle with dotted side be shown when dragging the mouse on a component?Just something like the one in the attachments, usually occurs in some graphics/pictures software.

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Swing/AWT/SWT :: Buttons Not Showing On JFrame

Aug 30, 2014

This is right from a book I'm reading but it doesn't work. The problem is to write an application that lets you determine the integer value returned by the InputEvent method getModifiers() when you click your left, right, or middle mouse button on a JFrame.

This is the code copied directly from the book. What is missing:

import java.awt.event.InputEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.JFrame;
public class JLeftOrRight {

[Code] ......

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Swing/AWT/SWT :: DeckPanel Are Not Showing Up When Run Program

Mar 25, 2014

My deckPanel's etc. are not showing up when I run my program. What am I missing in my orderCalc class or maybe from my deckPanel class?

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class OrderCalc extends JFrame

[code]...

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Swing/AWT/SWT :: Java Frame Is Showing Blank?

Jul 5, 2014

i have problem with the following two java classes, driver class Reservations and Room class. When i run, it just show blank frame, tell me where i gone wrong.

import javax.swing.JOptionPane;
import java.awt.*;
import java.awt.event.*;
public class Reservations extends Frame implements ActionListener {
Color lightRed=new Color(255,90,90);
Color lightGreen=new Color(140,215,40);
Rooms room=new Rooms(5,3);

[code]...

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Swing/AWT/SWT :: Iterating Through Objects To Draw On Panel?

Apr 23, 2014

I currently have the code set up to iterate through objects and keep track of them but how do I do the same and draw the objects on the panel window? I'm confused on what to do and how to start it.

Here's the code I have so far, the 'Car' which I want to draw extends to another class which extends to GameObject. I currently have a 'draw()' method under the 'Car' class but nothing in the 'draw()' method yet. From what I understand i'm suppose to have a 'draw()' method under 'GameObjects' class also?

public class MapView extends JPanel implements IObserver, ActionListener{
JPanel myPanel;
private Timer timer = new Timer(5, this);
int x = 0;
int moveX = 2;
public MapView(){
super.setBorder(BorderFactory.createTitledBorder("Map:"));

[code]....

Mostly I don't understand how to go through the iterator again to paint the objects. Wouldn't I need to put another iterator under 'paintComponent()' or can it be done under 'update()' ?

how to get some shapes from the GameObjects onto my panel.

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Swing/AWT/SWT :: Show Labels In A Panel With Scrolling

Oct 31, 2014

I've created a chat program, but now I need to show messages in different colors depending if the message is received or sent. I was wondering if I can use jlabel to do this but in this case I need that jlabels to scroll in a jpanel. how to do this or maybe using a rtf ?

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Swing/AWT/SWT :: Panel From Nested Class Does Not Display

Sep 26, 2014

I have this panel in a nested class in the MainPanel class and it does not display, when I launch the applet, or more like, the two menus "LineColor" and "BackColor" from the nested class ColorPanel do not display .

This is the code:

package ui.panels;
import interfaces.Resettable;
import java.awt.Color;
import java.awt.Component;
import java.awt.GridLayout;
import java.awt.Panel;

[code].....

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Swing/AWT/SWT :: How To Change Background Color Of Panel

May 3, 2014

Program is not working. I want to use buttonPanel object in ColorAction class and the process is unknown to me .

package button;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class ButtonFrame extends JFrame
{
public JPanel buttonPanel;

[Code]...

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