I need to create a JSlider for the message the user entered. You are able to ent

ID: 3688632 • Letter: I

Question

I need to create a JSlider for the message the user entered. You are able to enter a message and the message is displayed and you can edit the colors, italic and bold. I also need to to be able to use a jslider to adjust the position of the text within the text field. Here is my code so far.

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;

public class GUIEventDemo extends JFrame {
private JLabel jlblMessage = new JLabel("Hello", JLabel.CENTER);

// Create check boxes to set the font for the message
private JCheckBox jchkBold = new JCheckBox("Bold");
private JCheckBox jchkItalic = new JCheckBox("Italic");

// Create three radio buttons to set message colors
private JRadioButton jrbRed = new JRadioButton("Red");
private JRadioButton jrbGreen = new JRadioButton("Green");
private JRadioButton jrbBlue = new JRadioButton("Blue");

// Create a text field for setting a new message

private JTextField jtfMessage = new JTextField(10);

public static void main(String[] args) {
GUIEventDemo frame = new GUIEventDemo();
frame.pack();
frame.setTitle("GUIEventDemo");
frame.setLocationRelativeTo(null); // Center the frame
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}

public GUIEventDemo() {
jlblMessage.setBorder(new LineBorder(Color.BLACK, 2));
add(jlblMessage, BorderLayout.CENTER);

// Create a panel to hold check boxes
JPanel jpCheckBoxes = new JPanel();
jpCheckBoxes.setLayout(new GridLayout(2, 1));
jpCheckBoxes.add(jchkBold);
jpCheckBoxes.add(jchkItalic);
add(jpCheckBoxes, BorderLayout.EAST);

// Create a panel to hold radio buttons
JPanel jpRadioButtons = new JPanel();
jpRadioButtons.setLayout(new GridLayout(3, 1));
jpRadioButtons.add(jrbRed);
jpRadioButtons.add(jrbGreen);
jpRadioButtons.add(jrbBlue);
add(jpRadioButtons, BorderLayout.WEST);

// Create a radio-button group to group three buttons
ButtonGroup group = new ButtonGroup();
group.add(jrbRed);
group.add(jrbGreen);
group.add(jrbBlue);

// Set initial message color to blue
jrbBlue.setSelected(true);
jlblMessage.setForeground(Color.blue);

// Create a panel to hold label and text field
JPanel jpTextField = new JPanel();
jpTextField.setLayout(new BorderLayout(5, 0));
jpTextField.add(
new JLabel("Enter a new message"), BorderLayout.WEST);
jpTextField.add(jtfMessage, BorderLayout.CENTER);
jtfMessage.setHorizontalAlignment(JTextField.RIGHT);
add(jpTextField, BorderLayout.NORTH);

// Set mnemonic keys for check boxes and radio buttons
jchkBold.setMnemonic('B');
jchkItalic.setMnemonic('I');
jrbRed.setMnemonic('E');
jrbGreen.setMnemonic('G');
jrbBlue.setMnemonic('U');

// Register listeners with check boxes
jchkBold.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
setNewFont();
}
});
jchkItalic.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
setNewFont();
}
});

// Register listeners for radio buttons
jrbRed.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
jlblMessage.setForeground(Color.red);
}
});
jrbGreen.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
jlblMessage.setForeground(Color.green);
}
});
jrbBlue.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
jlblMessage.setForeground(Color.blue);
}
});

// Register listener for text field
jtfMessage.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
jlblMessage.setText(jtfMessage.getText());
jtfMessage.requestFocusInWindow();
}
});
}

private void setNewFont() {
// Determine a font style
int fontStyle = Font.PLAIN;
fontStyle += (jchkBold.isSelected() ? Font.BOLD : Font.PLAIN);
fontStyle += (jchkItalic.isSelected() ? Font.ITALIC : Font.PLAIN);

// Set font for the message
Font font = jlblMessage.getFont();
jlblMessage.setFont(
new Font(font.getName(), fontStyle, font.getSize()));

}
}

Explanation / Answer

GUIEventDemo.java:

/*in this program the text field along with three colors and two formats will be there if we change the text filed value the value get updater*/

package chegg;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

public class GUIEventDemo extends JFrame {
private static JLabel jlblMessage = new JLabel("Hello", JLabel.CENTER);

// Create check boxes to set the font for the message
private JCheckBox jchkBold = new JCheckBox("Bold");
private JCheckBox jchkItalic = new JCheckBox("Italic");

// Create a text field for setting a new message

private JTextField jtfMessage = new JTextField(10);
private JSlider s1, s2, s3;
private int red=0, green=0, blue=0;

public GUIEventDemo() {

jlblMessage.setBorder(new LineBorder(Color.BLACK, 2));
add(jlblMessage, BorderLayout.CENTER);

// Create a radio-button group to group three buttons
ButtonGroup group = new ButtonGroup();
group.add(jrbRed);
group.add(jrbGreen);
group.add(jrbBlue);

// Set initial message color to blue
jrbBlue.setSelected(true);
jlblMessage.setForeground(Color.blue);

// Set mnemonic keys for check boxes and radio buttons
jchkBold.setMnemonic('B');
jchkItalic.setMnemonic('I');
jrbRed.setMnemonic('E');
jrbGreen.setMnemonic('G');
jrbBlue.setMnemonic('U');

}

// Set font for the message
Font font = jlblMessage.getFont();
jlblMessage.setFont(
new Font(font.getName(), fontStyle, font.getSize()));

}
public static class SliderPanel extends JPanel
       implements ChangeListener   {
   private JSlider s1, s2, s3;
   private int red, green, blue;
   public SliderPanel() {
   red=0;green=0;blue=0;
   s1=new JSlider(0,255,0);s2=new JSlider(0,255,0);
    s3=new JSlider(0,255,0);s1.addChangeListener(this);
s2.addChangeListener(this);s3.addChangeListener(this);
   JPanel p1=new JPanel(new GridLayout(3,1));
   p1.add(s1); p1.add(s2); p1.add(s3); add(p1); }
   public void stateChanged(ChangeEvent e)   {
   if(e.getSource()==s1) red=s1.getValue();
   if(e.getSource()==s2) green=s2.getValue();
   if(e.getSource()==s3) blue=s3.getValue();
   repaint();
   }
}

}

/*above we inlcude slider demo inorder to move the text in the text field here is the sample program which can slide the text field*/

SliderDemo.java and MessagePanel.java:

import java.awt.*;

import javax.swing.*;

import javax.swing.event.*;

public class SliderDemo extends JFrame {

// Create horizontal and vertical sliders
private JSlider jsldHort = new JSlider(JSlider.HORIZONTAL);

private JSlider jsldVert = new JSlider(JSlider.VERTICAL);

// Create a MessagePanel
private MessagePanel messagePanel =

new MessagePanel("Welcome to Java");

public static void main(String[] args) {

SliderDemo frame = new SliderDemo();

frame.setTitle("SliderDemo");

frame.setLocationRelativeTo(null); // Center the frame
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.pack();

frame.setVisible(true);

}

public SliderDemo() {

// Add sliders and message panel to the frame
setLayout(new BorderLayout(5, 5));

add(messagePanel, BorderLayout.CENTER);

add(jsldVert, BorderLayout.EAST);

add(jsldHort, BorderLayout.SOUTH);

// Set properties for sliders
jsldHort.setMaximum(50);

jsldHort.setPaintLabels(true);

jsldHort.setPaintTicks(true);

jsldHort.setMajorTickSpacing(10);

jsldHort.setMinorTickSpacing(1);

jsldHort.setPaintTrack(false);

jsldVert.setInverted(true);

jsldVert.setMaximum(10);

jsldVert.setPaintLabels(true);

jsldVert.setPaintTicks(true);

jsldVert.setMajorTickSpacing(10);

jsldVert.setMinorTickSpacing(1);

// Register listener for the sliders
jsldHort.addChangeListener(new ChangeListener() {

/** Handle scroll bar adjustment actions */

public void stateChanged(ChangeEvent e) {

// getValue() and getMaximumValue() return int, but for better
// precision, use double
double value = jsldHort.getValue();

double maximumValue = jsldHort.getMaximum();

double newX = (value * messagePanel.getWidth() /

maximumValue);

messagePanel.setXCoordinate((int)newX);

}

});

jsldVert.addChangeListener(new ChangeListener() {

/** Handle scroll bar adjustment actions */

public void stateChanged(ChangeEvent e) {

// getValue() and getMaximumValue() return int, but for better
// precision, use double
double value = jsldVert.getValue();

double maximumValue = jsldVert.getMaximum();

double newY = (value * messagePanel.getHeight() /

maximumValue);

messagePanel.setYCoordinate((int) newY);

}

});

}

//Message Panel.java:

// MessagePanel.java: Display a message on a JPanel

import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Dimension;
import java.awt.Graphics;
import javax.swing.JPanel;

public class MessagePanel extends JPanel
{
private String message = "Welcome to Java"; // Message to display

// (x, y) coordinates where the message is displayed
private int xCoordinate = 20;
private int yCoordinate = 20;

// Indicating whether the message is displayed in the center
private boolean centered;

// Default constructor
public MessagePanel()
{
}

// Contructor with a message parameter
public MessagePanel(String message)
{
this.message = message;
}

public String getMessage()
{
return message;
}

public void setMessage(String message)
{
this.message = message;
}

public int getXCoordinate()
{
return xCoordinate;
}

public void setXCoordinate(int x)
{
this.xCoordinate = x;
}

public int getYCoordinate()
{
return yCoordinate;
}

public void setYCoordinate(int y)
{
this.yCoordinate = y;
}

public boolean isCentered()
{
return centered;
}

public void setCentered(boolean centered)
{
this.centered = centered;
}

public void paintComponent(Graphics g)
{
super.paintComponent(g);

if (centered)
{
// Get font metrics for the current font
FontMetrics fm = g.getFontMetrics();

// Find the center location to display
int w = fm.stringWidth(message); // Get the string width
int h = fm.getAscent(); // Get the string height
xCoordinate = (getWidth()-w)/2;
yCoordinate = (getHeight()+h)/2;
}

g.drawString(message, xCoordinate, yCoordinate);
}

public Dimension getPreferredSize()
{
return new Dimension(200, 100);
}

public Dimension getMinimumSize()
{
return new Dimension(200, 100);
}
}

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