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();
}
});
}
}
Related
I have a JTextArea where I want to allow the user to input any number of strings up to 100 but it could be less. When I set the JTextArea as I have in my code below where it is commented out (i.e. //tfResult= new JTextArea(10, 0);) and the user inputs ten lines of strings then my code runs exactly as expected and prints out what I need it to.
But if I try to input more of less lines I get
java.lang.ArrayIndexOutOfBoundsException
followed by the number of lines of user input, whether I have it declared with no bounds or as I have it commented out.
I am new to graphics in java and I can't figure out why this is happening and I have searched everywhere for answers. Do I have the bounds set wrong or have I declared the JTextArea wrong?
I also am trying to include a JScrollPane but I am having issues with that also as its not showing up.
I would really appreciate any help as I am struggling to solve this issue.
class Window {
JFrame windowFrame;
Panel bottomPanel;
JScrollPane scroll;
JTextArea tfResult;
Button btnPlayAgain;
Font font;
Window(int width, int height, String title)
{
windowFrame = new JFrame();
windowFrame.setTitle(title);
windowFrame.setBounds(0,0,width,height);
windowFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
windowFrame.setResizable(true);
windowFrame.setCursor(new Cursor(Cursor.HAND_CURSOR)); // setting cursor to hand
windowFrame.setLayout(null);
createBottomPanel();
windowFrame.add(bottomPanel);
//windowFrame.add(field.getCanvas());
windowFrame.setVisible(true);
}
private void createBottomPanel()
{
JButton b = new JButton("Compute");
bottomPanel = new Panel();
bottomPanel.setBackground(Color.PINK);
bottomPanel.setBounds(0,400,800,140);
bottomPanel.setLayout(null);
//*********
//tfResult= new JTextArea(10, 0);
tfResult= new JTextArea();
tfResult.setBounds(10,10,600,100);
tfResult.setFont(new Font("SansSerif", Font.BOLD, 16));
tfResult.setFocusable(true);
scroll = new JScrollPane(tfResult);
scroll.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
scroll.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
btnPlayAgain = new Button("Compute");
btnPlayAgain.setBounds(620,10,150,100);
btnPlayAgain.setBackground(Color.RED);
btnPlayAgain.setFont(new Font("SansSerif", Font.BOLD, 24));
btnPlayAgain.setFocusable(true);
bottomPanel.add(tfResult);
bottomPanel.add(btnPlayAgain);
bottomPanel.add(b);
bottomPanel.add(scroll);
tfResult.setVisible(true);
scroll.setVisible(true);
btnPlayAgain.setVisible(true);
bottomPanel.setVisible(true);
btnPlayAgain.addActionListener(new ActionListener()
{
//#Override
public void actionPerformed(ActionEvent e)
{
//should include the code to genrate the output inside here
String input = tfResult.getText();
Mat xy;
xy = new Mat();
//String output = xy.getOutput(input).toString();
String output = xy.getOutput(input);
//String output = Output(input);
tfTarget.setText(output);
}
});
}
}
I went ahead and created the following GUI that allows you to enter data with a JTextArea.
The first thing I did was start my Swing application with a call to the SwingUtilities invokeLater method. This method ensures that the Swing components are created and executed on the Event Dispatch Thread.
Next, I created a JFrame. Then I created a JPanel with a BorderLayout. The JTextArea is inside of a JScrollPane, which is then placed inside of the center of a JPanel.
The JButton is placed after the last line of the JPanel.
Here's the complete runnable code, otherwise known as a minimal runnable example.
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.SwingUtilities;
public class JTextAreaInputGUI implements Runnable {
public static void main(String[] args) {
SwingUtilities.invokeLater(new JTextAreaInputGUI());
}
private JTextArea textArea;
#Override
public void run() {
JFrame frame = new JFrame("JTextArea Input GUI");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(createMainPanel(), BorderLayout.CENTER);
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
private JPanel createMainPanel() {
JPanel panel = new JPanel(new BorderLayout());
panel.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
textArea = new JTextArea(10, 40);
JScrollPane scrollPane = new JScrollPane(textArea);
panel.add(scrollPane, BorderLayout.CENTER);
JButton button = new JButton("Submit");
button.addActionListener(new ButtonListener());
panel.add(button, BorderLayout.AFTER_LAST_LINE);
return panel;
}
public class ButtonListener implements ActionListener {
#Override
public void actionPerformed(ActionEvent event) {
System.out.println(textArea.getText().trim());
}
}
}
I'm currently working on a media player for java, and with the power of VLCJ I was working on implementing an equalizer adjust window. There will be 11 vertical sliders with a JLabel underneath them indicating the hZ band and the dB level of the band. However, the slider keeps adding a huge gap between itself and the JLabel. I tried stacking just two JLabels on top of each other and there's barely a gap at all. My code is below. (The return equalizer stuff hasn't been implemented yet. I just want a basic UI working before I start adding in the functionality)
import java.awt.GridLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JSlider;
import uk.co.caprica.vlcj.player.Equalizer;
public class VideoEQFrame {
public VideoEQFrame() {
//constructor
}
public Equalizer show() {
JFrame frame = new JFrame("Effects");
JPanel panel = new JPanel();
JPanel sliders= new JPanel();
JPanel gainObjects = new JPanel(new GridLayout(2, 0, 2, 0));
JSlider gainS = new JSlider(JSlider.VERTICAL, -12, 12, 0);
gainS.setMajorTickSpacing(2);
gainS.setPaintTicks(true);
gainS.setToolTipText("Adjust the gain");
JLabel gainL = new JLabel("Text");
gainObjects.add(gainS);
gainObjects.add(gainL);
sliders.add(gainObjects);
panel.add(sliders);
frame.add(panel);
frame.setSize(new Dimension(600, 300));
//frame.setResizable(false);
frame.setVisible(true);
Equalizer eq = new Equalizer(0);
return eq;
}
}
You are using GridLayout to lay the slider and the text label. That means that they will both occupy the same height. So because the slider has bigger height, the height of the label also adjusts to this height. Try using another LayoutManager like BorderLayout, like so:
import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JSlider;
public class VideoEQFrame {
public VideoEQFrame() {
//constructor
}
public void show() {
JFrame frame = new JFrame("Effects");
JPanel panel = new JPanel();
JPanel sliders= new JPanel();
JPanel gainObjects = new JPanel(new BorderLayout());
JSlider gainS = new JSlider(JSlider.VERTICAL, -12, 12, 0);
gainS.setMajorTickSpacing(2);
gainS.setPaintTicks(true);
gainS.setToolTipText("Adjust the gain");
JLabel gainL = new JLabel("Text");
gainObjects.add(gainS, BorderLayout.CENTER);
gainObjects.add(gainL, BorderLayout.PAGE_END);
sliders.add(gainObjects);
panel.add(sliders);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(panel);
frame.pack();
frame.setLocationRelativeTo(null);
//frame.setResizable(false);
frame.setVisible(true);
// Equalizer eq = new Equalizer(0);
// return eq;
}
public static void main(final String[] args) {
new VideoEQFrame().show();
}
}
I'm trying to create a scrollable text area, (much like the one i'm writing in right now as in stack overflow's one). It seems as if the scrollpane and the text area are mutually exclusive and i'd like to create a connection between them
package Notepad;
import java.awt.EventQueue;
import java.awt.Font;
import javax.swing.JFrame;
import java.awt.BorderLayout;
import javax.swing.JTextArea;
import javax.swing.JScrollBar;
public class test {
private JFrame frame;
private Font f = new Font(null);
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
test window = new test();
window.frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
public test() {
initialize();
}
private void initialize() {
frame = new JFrame();
frame.setBounds(100, 100, 450, 300);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().setLayout(new BorderLayout(0, 0));
JTextArea textArea = new JTextArea();
frame.getContentPane().add(textArea, BorderLayout.CENTER);
textArea.setLineWrap(true);
textArea.setFont(f.deriveFont(40f));
JScrollBar scrollBar = new JScrollBar();
frame.getContentPane().add(scrollBar, BorderLayout.EAST);
}
}
use JScrollPane rather than JScrollBar
Wrong:
JScrollBar scrollBar = new JScrollBar();
Right:
JScrollPane scroller = new JScrollPane(textArea);
you can set the size of this ScrollPane like so:
Dimension size = new Dimension (0, 50);
scroller.setPreferredSize(size);
NOTE: When you use JScrollPanes, be sure to put where you want it in parentheses, or it will not show up.
JTextArea textArea = new JTextArea();
textArea.setLineWrap(true);
textArea.setFont(f.deriveFont(40f));
JScrollPane scrollPane = new JScrollPane(textArea);
frame.getContentPane().add(scrollPane, BorderLayout.CENTER);
OMG sorry guys. I imported JScrollBar not JScrollPane. Thank you all. I'm going to test this fix and get back to you.
Edit:
It works. Thank you guys!!!
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();
}
});
}
}
I know a lot of people asked this question, but i still can't resolve this problem.
I have a JPanel inside a JScrollPane. JPanel contains six panels that are loaded dynamically.
After the panels are loaded the system makes a vertical autoscroll to the middle of the panel.
I have to avoid this, so I tried with this:
panel.scrollRectToVisible(scrollPane.getBounds());
But it doesn't work.
My scrollPane has been created in this way
JScrollPane scrollPane= new JScrollPane();
scrollPane.setBounds(panel.getBounds());
scrollPane.setViewportView(panel);
Can you help me?
panel.scrollRectToVisible(scrollPane.getBounds()); should be panel.scrollRectToVisible(JPanelAddedOnRuntime.getBounds());
rest of code (posted here) coudn't be works,
for better help sooner post an SSCCE, short, runnable, compilable
EDIT
works, again you would need to re_read my above 3rd. point
import java.awt.Dimension;
import java.awt.Font;
import java.awt.GridLayout;
import java.util.Vector;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
public class ScrollTesting {
private JPanel panel = new JPanel();
private JScrollPane scrollPane = new JScrollPane(panel);
private Vector<JTextField> fieldsVector = new Vector<JTextField>();
private Dimension preferredSize = new Dimension(400, 40);
private Font font = new Font("Tahoma", 1, 28);
public ScrollTesting() {
panel.setLayout(new GridLayout(100, 1));
for (int i = 0; i < 100; i++) {
fieldsVector.addElement(new JTextField());
fieldsVector.lastElement().setPreferredSize(preferredSize);
fieldsVector.lastElement().setFont(font);
panel.add(fieldsVector.lastElement());
}
JFrame frame = new JFrame();
frame.setSize(400, 300);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(scrollPane);
frame.setVisible(true);
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
JTextField tf = (JTextField) fieldsVector.lastElement();
panel.scrollRectToVisible(tf.getBounds());
}
});
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
ScrollTesting scrollTesting = new ScrollTesting();
}
});
}
}