The code I have written so far has two panel, one for text and another for graph. Using JFileChooser I open a text file and the content is displayed on a textarea. Now I want to draw a simple line chart using the data in the text file which will be displayed in the other panel. The graph should be drawn using AWT/Swing libraries only. Any help would be appreciated.
The data in the text file:
Title: Randon Number Graph
Xlabel: Possible Range
Ylabel: Typical Value
start: -100.5
interval: 20.25
40, 90.2, 101.654, 60.2, 90.2, 100.2, 95.22, 101, 99.99, 124, 128, 64.3, 32.1
My code so far:
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.TextArea;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Scanner;
import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
import javax.swing.JTextArea;
import javax.swing.event.MenuEvent;
import javax.swing.event.MenuListener;
public class GUI extends JFrame implements MenuListener, ActionListener, KeyListener {
public GUI() {
// Setting Title, size and layout
setTitle("Data Visualiser");
setSize(730, 350);
setLayout(new BorderLayout());
// Creates a menubar for a JFrame
final JMenuBar menuBar = new JMenuBar();
// Add the menubar to the frame
setJMenuBar(menuBar);
// Define and add two drop down menu to the menubar, "file" and "help"
JMenu fileMenu = new JMenu("File");
JMenu helpMenu = new JMenu("Help");
menuBar.add(fileMenu);
menuBar.add(helpMenu);
// adding menu items and icons to the "file" drop down menu,
final JMenuItem openAction = new JMenuItem("Open", new ImageIcon("images/Open-icon.png"));
final JMenuItem saveAction = new JMenuItem("Save", new ImageIcon("images/save-file.png"));
final JMenuItem exitAction = new JMenuItem("Exit", new ImageIcon("images/exit-icon.png"));
final JMenuItem aboutAction = new JMenuItem("About", new ImageIcon("images/about-us.png"));
//////////////////////////////////////////////////////////////////////////////////////////////
// Create a text area.
final JTextArea textArea = new JTextArea("");
textArea.setFont(new Font("Serif", Font.BOLD, 16));
textArea.setLineWrap(true);
textArea.setWrapStyleWord(true);
textArea.setEditable(false);
JScrollPane textScrollPane = new JScrollPane(textArea);
// textArea.add(textScrollPane, BorderLayout.CENTER); //add the
// JScrollPane to the panel
// Scrollbars
textScrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
textScrollPane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
textScrollPane.setPreferredSize(new Dimension(350, 350));
textScrollPane.setBorder(
BorderFactory.createCompoundBorder(BorderFactory.createTitledBorder("Textual Representation"),
BorderFactory.createEmptyBorder(5, 5, 5, 5)));
// Create an graphics pane.
JTextArea graphicsArea = new JTextArea("");
graphicsArea.setFont(new Font("Serif", Font.BOLD, 16));
graphicsArea.setLineWrap(true);
graphicsArea.setWrapStyleWord(true);
graphicsArea.setEditable(false);
JScrollPane graphicsScrollPane = new JScrollPane(graphicsArea);
// Scrollbars
graphicsScrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
graphicsScrollPane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
graphicsScrollPane.setPreferredSize(new Dimension(350, 350));
graphicsScrollPane.setBorder(
BorderFactory.createCompoundBorder(BorderFactory.createTitledBorder("Graphical Representation"),
BorderFactory.createEmptyBorder(5, 5, 5, 5)));
// Put the graphics pane and the text pane in a split pane.
JSplitPane splitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, textScrollPane, graphicsScrollPane);
splitPane.setOneTouchExpandable(true);
splitPane.setResizeWeight(0.5);
JPanel rightPane = new JPanel(new GridLayout(1, 0));
rightPane.add(splitPane);
// Put everything together.
JPanel leftPane = new JPanel(new BorderLayout());
add(rightPane, BorderLayout.LINE_END);
////////////////////////////////////////////////////////////////////////////////////////////////////////////
// file menu shortcut
fileMenu.setMnemonic(KeyEvent.VK_F);
fileMenu.add(openAction);
// openAction.addActionListener(this);
openAction.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
if (arg0.getSource().equals(openAction)) {
// using JFileChooser to open the text file
JFileChooser fileChooser = new JFileChooser();
if (fileChooser.showOpenDialog(fileChooser) == JFileChooser.APPROVE_OPTION) {
fileChooser.setCurrentDirectory(new File(System.getProperty("user.home"))); // setting
// current
// directory
File file = fileChooser.getSelectedFile();
BufferedReader br = null;
try {
FileReader fr = new FileReader(file); // using
// filereader
// to read
// the text
// file
br = new BufferedReader(fr);
textArea.read(br, file);
Scanner f = new Scanner(br);
String line1 = f.nextLine();
String line = br.readLine();
while (line != null) {
// textArea.append(line + "\n");
line = br.readLine();
textArea.read(br, textArea); // here we read in
// the text file
// file content validation
while ((line = br.readLine()) != null) {
if (line.startsWith("Title:")) {
textArea.append(line + "\n");
} else {
JOptionPane.showMessageDialog(new JFrame(), "Invalid format.", "ERROR!",
JOptionPane.ERROR_MESSAGE);
}
if (line1.startsWith("XLabel:")) {
textArea.append(line1 + "\n");
} else {
JOptionPane.showMessageDialog(new JFrame(), "Invalid format.", "ERROR!",
JOptionPane.ERROR_MESSAGE);
}
if (line1.startsWith("YLabel:")) {
textArea.append(line1 + "\n");
} else {
JOptionPane.showMessageDialog(new JFrame(), "Invalid format.", "ERROR!",
JOptionPane.ERROR_MESSAGE);
}
}
}
} catch (FileNotFoundException e) {
JOptionPane.showMessageDialog(new JFrame(), "File not found!", "ERROR!",
JOptionPane.ERROR_MESSAGE); // error message
// if file not
// found
} catch (IOException e) {
e.printStackTrace();
} finally {
if (br != null) {
try {
br.close();
} catch (IOException e) {
}
}
}
}
}
}
});
fileMenu.add(saveAction);
fileMenu.add(exitAction);
// exit button shortcut
exitAction.setMnemonic(KeyEvent.VK_X);
exitAction.addActionListener(new ActionListener() {
// setting up exit button
public void actionPerformed(ActionEvent arg0) {
if (arg0.getSource().equals(exitAction)) {
System.exit(0);
}
}
});
fileMenu.addSeparator();
helpMenu.addSeparator();
helpMenu.add(aboutAction);
// about button shortcut
aboutAction.setMnemonic(KeyEvent.VK_A);
aboutAction.addActionListener(new ActionListener() {
// clicking on about button opens up a dialog box which contain
// information about the program
public void actionPerformed(ActionEvent arg0) {
JOptionPane.showMessageDialog(menuBar.getComponent(0),
"This program is based on the development of a data visualization tool.",
"About Us", JOptionPane.PLAIN_MESSAGE);
}
});
}
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
}
@Override
public void menuCanceled(MenuEvent e) {
// TODO Auto-generated method stub
}
@Override
public void menuDeselected(MenuEvent e) {
// TODO Auto-generated method stub
}
@Override
public void menuSelected(MenuEvent e) {
// TODO Auto-generated method stub
}
@Override
public void keyPressed(KeyEvent arg0) {
/*if (arg0.getKeyChar() == 'x') {
System.exit(0);
}*/
}
@Override
public void keyReleased(KeyEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void keyTyped(KeyEvent arg0) {
// TODO Auto-generated method stub
}
}
