Whenever I run my program my JTextArea does not follow the dimension that I have given it, but if I resize my JFrame it updates and sets its size to what I put.
What is the issue?
public ControlPanel() {
// create our list of players
list = new JList(model);
// create our scroll panes
userspane = new JScrollPane(list);
consolepane = new JScrollPane(console);
// set sizes
userspane.setSize(100, 500);
jta.setSize(100, 500);
list.setSize(100, 500);
consolepane.setSize(100, 500);
console.setSize(100, 500);
// add to panel
panel.add(userspane, BorderLayout.CENTER);
panel.add(kick);
panel.add(ban);
panel.add(info);
panel.add(consolepane, BorderLayout.CENTER);
// set frame properties
setTitle("RuneShadows CP");
setSize(280, 400);
//setResizable(false);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setContentPane(panel);
setVisible(true);
}
Don't set the sizes to anything.
For JTextArea you can use the constructor JTextArea(int rows, int charSpaces)
Just pack() the JFrame and it will respect all the preferred sizes of the components inside.
Also instead of setting the content pane to the panel, just add the panel. That will respect the preffered size of the panel when pack() is called
I'm not exactly sure what variable was what (or the sizes you wanted the), so I assumed text areas, and others as well. See this example where I just used the JTextArea constructor I mentioned and just packed.
EDITED with no sizes set
import java.awt.BorderLayout;
import javax.swing.DefaultListModel;
import javax.swing.JButton;
import javax.swing.JFrame;
import static javax.swing.JFrame.EXIT_ON_CLOSE;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.SwingUtilities;
public class ControlPanel extends JFrame {
JScrollPane userspane;
JList list;
DefaultListModel model = new DefaultListModel();
JScrollPane consolepane;
JTextArea console = new JTextArea(20, 50);
JTextArea jta = new JTextArea(6, 50);
JPanel panel = new JPanel();
JButton kick = new JButton("Kick");
JButton ban = new JButton("Ban");
JButton info = new JButton("Info");
public ControlPanel() {
// create our list of players
list = new JList(model);
// create our scroll panes
userspane = new JScrollPane(list);
consolepane = new JScrollPane(console);
// add to panel
panel.add(userspane, BorderLayout.CENTER);
panel.add(kick);
panel.add(ban);
panel.add(info);
panel.add(consolepane, BorderLayout.CENTER);
add(panel);
pack();
setTitle("RuneShadows CP");
//setResizable(false);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable(){
public void run(){
new ControlPanel();
}
});
}
}
UPDATE - with positioning
Keep in mind also, with BorderLayout you need to specify a position for every component you add or else it will default to CENTER and each position an only have one component. I noticed you trying to add two components to the CENTER
import java.awt.BorderLayout;
import javax.swing.DefaultListModel;
import javax.swing.JButton;
import javax.swing.JFrame;
import static javax.swing.JFrame.EXIT_ON_CLOSE;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.SwingUtilities;
public class ControlPanel extends JFrame {
JScrollPane userspane;
JList list;
DefaultListModel model = new DefaultListModel();
JScrollPane consolepane;
JTextArea console = new JTextArea(20, 50);
JTextArea jta = new JTextArea(6, 50);
JPanel panel = new JPanel(new BorderLayout());
JButton kick = new JButton("Kick");
JButton ban = new JButton("Ban");
JButton info = new JButton("Info");
public ControlPanel() {
// create our list of players
list = new JList(model);
// create our scroll panes
userspane = new JScrollPane(list);
consolepane = new JScrollPane(console);
// add to panel
panel.add(userspane, BorderLayout.SOUTH);
JPanel buttonPanel = new JPanel();
buttonPanel.add(kick);
buttonPanel.add(ban);
buttonPanel.add(info);
panel.add(buttonPanel, BorderLayout.CENTER);
panel.add(consolepane, BorderLayout.NORTH);
add(panel);
pack();
setTitle("RuneShadows CP");
//setResizable(false);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable(){
public void run(){
new ControlPanel();
}
});
}
}
Related
JPanel panel = new JPanel(new GridLayout(0,1));
JScrollPane contentpane = new JScrollPane(panel);
JButton add = new JButton("ADD");
add.actionListener(new ActionListener() {
public void actionPerformed(){
MyPanel newpanel = new MyPanel("title","Button"); //MyPanel is a class which extends JPanel and contains constructor MyPanel(String TitleToSet ,String ButtonTitleTOAdd)
panel.add(newpanel);
panel.repaint();
}) ;
I have used this code thinking that it will add the MyPanel to the grid layout dynamically and "panel" would be scrollable if more "MyPanel"s are added. However, this was not the case, 1st "MyPanel" filled whole "panel" and on adding second "MyPanel" (by clicking button "Add"), the 1st "MyPanel" was shrinked to make space for second one to be added.. and on adding more, all the "MyPanel"s were fit in the viewport instead of making the "panel" scrollable.. How to add those "MyPanel"s dynamically and making the "panel" scrollable on adding more of those?? Any help would be appreciated.
http://docs.oracle.com/javase/7/docs/api/javax/swing/JScrollPane.html :
By default JScrollPane uses ScrollPaneLayout to handle the layout of
its child Components. ScrollPaneLayout determines the size to make the
viewport view in one of two ways:
[...]
getPreferredSize is used.
You should add the line
panel.setPreferredSize(new Dimension(0, panel.getComponents().size() * SUB_PANEL_HEIGHT));
to your ActionListener.
Full example:
package main;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.Panel;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.Timer;
class Test {
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.setPreferredSize(new Dimension(400, 400));
frame.setSize(400, 400);
JPanel panel = new JPanel(new GridLayout(0, 1));
panel.add(new JLabel("BOO"));
panel.add(new JButton("BBBB"));
JScrollPane contentpane = new JScrollPane(panel);
frame.add(contentpane);
new Timer(1000, new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
JPanel newpanel = new JPanel();
newpanel.add(new JLabel("LOL"));
panel.add(newpanel);
System.out.println(100 * panel.getComponents().length);
panel.setPreferredSize(new Dimension(0, 100 * panel.getComponents().length));
contentpane.validate();
}
}).start();
frame.setVisible(true);
}
}
I am creating a bespoke table that I want to scroll up and down, so I am using JScrollPane.
My problem is that each time I add another row in the table it is adding it to the side of the last one, rather than below the last line, which is where I want it to be. Eg it is adding columns to the table rather than rows.
The number of rows that need to be added is uncertain and depends on how many entries there are in the table.
I know I can use a table but for the purposes of this exercise I want to do it this way.
Below is an MCVE version of my code that demonstrates the problem. I left the colour change in so the fields are more visible:
public class Customers {
public static JFrame frame = new JFrame();
public static void frameGui(JPanel panel, String name){
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setContentPane(panel);
frame.setSize(1200,500);
frame.setVisible(true);
}
public static void ScrollCustomersGui(){
JPanel Table = new JPanel();
Table.add(customersTableHeadings(Table));
Table.add(customersTableHeadings(Table));
Table.add(customersTableHeadings(Table));
JScrollPane scroll = new JScrollPane(Table);
JPanel All = new JPanel(new BorderLayout());
All.add(scroll);
frameGui(All, "Customers");
}
public static JPanel customersTableHeadings(JPanel panel){
FlowLayout FlowCustTable = (FlowLayout)panel.getLayout();
FlowCustTable.setHgap(0);
JPanel customersTable = new JPanel(FlowCustTable);
JTextField custid = new JTextField("ONE");
custid.setPreferredSize(new Dimension(500, 50));
custid.setBackground(Color.CYAN);
customersTable.add(custid);
return customersTable;
}
}
Use vertical BoxLayout here is the modified code :
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
public class Customers
{
public static JFrame frame = new JFrame();
public static void frameGui(JPanel panel, String name)
{
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setContentPane(panel);
frame.setSize(1200, 500);
frame.setVisible(true);
}
public static void ScrollCustomersGui()
{
Box box = Box.createVerticalBox();
//JPanel Table = new JPanel();
//Table.setLayout(new BoxLayout(Table, BoxLayout.Y_AXIS));
box.add(customersTableHeadings());
box.add(customersTableHeadings());
box.add(customersTableHeadings());
JScrollPane scroll = new JScrollPane(box);
JPanel All = new JPanel(new BorderLayout());
All.add(scroll);
frameGui(All, "Customers");
}
public static JPanel customersTableHeadings()
{
// FlowLayout FlowCustTable = (FlowLayout) panel.getLayout();
// FlowCustTable.setHgap(0);
JPanel customersTable = new JPanel();
customersTable.setMaximumSize(new Dimension(550, 60));
JTextField custid = new JTextField("ONE");
custid.setPreferredSize(new Dimension(500, 50));
custid.setBackground(Color.CYAN);
customersTable.add(custid);
return customersTable;
}
public static void main(String[] args)
{
ScrollCustomersGui();
}
}
you are using a FlowLayout which will not work for your case you can use a BoxLayout check it here, you can also use a GridBagLayout but it is complex :)
I'm trying to create a panel that uses a JLayeredPane to have a panel centered above another, larger panel. I can't seem to get the smaller panel to display though. Any ideas as to what I'm doing wrong?
import java.awt.Dimension;
import javax.swing.BoxLayout;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLayeredPane;
import javax.swing.JPanel;
public class MainPanel extends JPanel {
private JLayeredPane pane;
private AllPlayersPanel players; //Larger panel, uses circleLayout
private GamePanel game; //Smaller panel, simple BorderLayout
public MainPanel(){
super();
setSize(900, 900);
setLayout(new BoxLayout(this, BoxLayout.PAGE_AXIS));
pane = new JLayeredPane();
pane.setPreferredSize(new Dimension(900, 900));
players = new AllPlayersPanel();
players.setPreferredSize(players.getPreferredSize());
players.setLocation(0,0);
//players.setOpaque(false);
pane.add(players, new Integer(0));
game = new GamePanel();
game.setPreferredSize(game.getPreferredSize());
game.setLocation(385, 405);
//game.setOpaque(false);
pane.add(game, new Integer(2));
add(pane);
}
public static void main(String[] args) {
JFrame frame = new JFrame();
JComponent newPane = new MainPanel();
newPane.setOpaque(true);
frame.setContentPane(newPane);
frame.pack();
frame.setVisible(true);
}
}
I've tried every combination of .setOpaque() I can think of as well.
CircleLayout can be found here
Basically, you're using setSize when you shouldn't be and preferredSize when you don't need to...
For example.
In you constructor of the MainPanel you call setSize(900, 900); when you should have overridden getPreferredSize then on the panels you are adding to the JLayeredPane you're calling setPreferredSize but the JLayeredPane has no layout manager with which to check this value, so the size of these panels remain as 0x0.
Besides, I'm not sure what you expected to gain from calling players.setPreferredSize(players.getPreferredSize());, which basically will set the preferred size to 0x0 any way :P
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import javax.swing.BoxLayout;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLayeredPane;
import javax.swing.JPanel;
import javax.swing.border.LineBorder;
public class MainPanel extends JPanel {
private JLayeredPane pane;
private JPanel players; //Larger panel, uses circleLayout
private JPanel game; //Smaller panel, simple BorderLayout
public MainPanel() {
super();
// setSize(900, 900);
// setLayout(new BoxLayout(this, BoxLayout.PAGE_AXIS));
setLayout(new BorderLayout());
pane = new JLayeredPane();
// pane.setPreferredSize(new Dimension(900, 900));
pane.setBorder(new LineBorder(Color.RED));
players = new JPanel();
players.setBackground(Color.RED);
players.setSize(getPreferredSize());
players.setLocation(0, 0);
//players.setOpaque(false);
pane.add(players, new Integer(0));
game = new JPanel();
game.setSize(game.getPreferredSize());
game.setBackground(Color.BLUE);
game.setLocation(385, 405);
//game.setOpaque(false);
pane.add(game, new Integer(2));
add(pane);
}
#Override
public Dimension getPreferredSize() {
return new Dimension(900, 900);
}
public static void main(String[] args) {
JFrame frame = new JFrame();
JComponent newPane = new MainPanel();
newPane.setOpaque(true);
frame.setContentPane(newPane);
frame.pack();
frame.setVisible(true);
}
}
I want to make a simple program that will have one button and multiple fields. When I was planning this out in my head I wanted to use a gridlayout, or at least cent the button at first since I am learning. Here is what I have so far, my question that I am leading to is where do I put in my grid layout, or do I set the alignment center in the panel, frame or button?
import java.awt.GridLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class Normal {
public static void main(String[] args) {
JFrame frame = new JFrame("test");
JButton button = new JButton("why");
JPanel panel = new JPanel();
JTextField field= new JTextField();
//button
button.setSize(50, 50);
//Field
field.setSize(250, 25);
//Frame
frame.setSize(500, 500);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
frame.add(panel);
frame.add(field);
frame.add(button);
}
}
Always add the components in a Container of the JFrame. Set the Layout of Container as GridLayout. For example You can change your code as follows:
import java.awt.GridLayout;
import java.awt.Container;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class Normal {
public static void main(String[] args) {
JFrame frame = new JFrame("test");
JButton button = new JButton("why");
JPanel panel = new JPanel();
JTextField field= new JTextField();
Container c = frame.getContentPane();
c.setLayout(new GridLayout(3,1));//Devides the container in 3 rows and 1 column
c.add(panel);//Add in first row
c.add(button);//Add in second row
c.add(field);//Add in third row
frame.setSize(500, 300);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}
In an approach where you extend your class from JFrame, you could simply set where you would like to add the components. If you have a panel with ex. a button, you could add it like this:
add(panel, BorderLayout.CENTER);
Hope this helps.
I've been doing some research about Swing in order to build a css editor with Java. I'm stuck trying to export CSS and HTML in JTextArea's ( I'll after create .css document. )
Here is the GridLayout that my main layout calls after clicking "Build" menu item.
package csseditor_gui_built;
import java.awt.GridLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextArea;
import javax.swing.JScrollPane;
import javax.swing.JScrollBar;
import javax.swing.text.DefaultCaret;
import java.awt.Font;
import java.awt.Color;
public class ExportGridLayout extends JFrame {
public ExportGridLayout(String HTML, String CSS){
GridLayout layout = new GridLayout(1,2,2,2);
setLayout(layout);
JTextArea textAreaHtml = new JTextArea();
JTextArea textAreaCss = new JTextArea();
//Creating a new font.
Font fontumuz = new Font("Courier New", Font.PLAIN, 12);
// Setting constructor strings
textAreaHtml.setText(HTML);
textAreaCss.setText(CSS);
//Additional details..
textAreaHtml.setEditable(false);
textAreaCss.setEditable(false);
//Appending font to the textArea's
textAreaHtml.setFont(fontumuz);
textAreaCss.setFont(fontumuz);
// Adding the objects to JFrame
add(textAreaHtml);
add(textAreaCss);
}
}
It's pretty straight forward. Just help me adding scroll bars or panes to these textArea's. Any other suggestions in the website do not work.
Its this way...
JTextArea text = new JTextArea();
JScrollPane scroll = new JScrollPane(text);
Edited part
add(scroll);
Here is one working code for your help :
import java.awt.*;
import javax.swing.*;
public class JTextAreaExample
{
private void createAndDisplayGUI()
{
JFrame frame = new JFrame("JTextArea Scrollable");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel contentPane = new JPanel();
contentPane.setLayout(new GridLayout(1, 2, 2, 2));
JTextArea tArea1 = new JTextArea();
tArea1.setLineWrap(true);
JTextArea tArea2 = new JTextArea();
tArea2.setLineWrap(true);
tArea1.setText("I got a long long line of text in my JTextArea");
tArea2.setText("I got a long long line of text in my JTextArea");
JScrollPane scroller1 = new JScrollPane();
JScrollPane scroller2 = new JScrollPane();
scroller1.setViewportView(tArea1);
scroller2.setViewportView(tArea2);
contentPane.add(scroller1);
contentPane.add(scroller2);
frame.setContentPane(contentPane);
frame.setSize(100, 100);
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
public static void main(String... args)
{
SwingUtilities.invokeLater(new Runnable()
{
public void run()
{
new JTextAreaExample().createAndDisplayGUI();
}
});
}
}