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Assignments.java
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package se115.master;
import javax.swing.*;
import javax.swing.border.LineBorder;
import javax.swing.border.TitledBorder;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.*;
import java.util.ArrayList;
public class Assignments {
private JFrame tempMainFrame; // This provides to turn back safely to the Main Panel frame
private JFrame assignmentFrame;
private JFrame addAssignmentFrame;
private JTextArea targetBoard;
private JTextField lectureInput;
private JTextArea targetInput;
private int counter;
public void setTempMainFrame(JFrame tempMainFrame) {
this.tempMainFrame = tempMainFrame;
}
public void build() {
assignmentFrame = new JFrame("Assignment");
assignmentFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel content = new JPanel();
content.setBorder(new TitledBorder(new LineBorder(Color.blue,5),
"<html><h1>Assignments</h1></html>"));
content.setLayout(new BorderLayout());
Font boldFont = new Font("sanserif", Font.BOLD, 20);
targetBoard = new JTextArea(10, 20);
targetBoard.setEditable(false);
targetBoard.setLineWrap(true);
targetBoard.setWrapStyleWord(true);
targetBoard.setFont(boldFont);
printTasks();
JScrollPane scrollPane = new JScrollPane(targetBoard);
scrollPane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
scrollPane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
JPanel buttonPanel = new JPanel();
buttonPanel.setLayout(new GridLayout(3,1));
JButton addBtn = new JButton("Add");
JButton deleteBtn = new JButton("Delete");
JButton mainPageBtn = new JButton("Main Page");
addBtn.addActionListener(new AddAssignmentListener());
deleteBtn.addActionListener(new DeleteAssignmentListener());
mainPageBtn.addActionListener(new MainPageListener());
buttonPanel.add(addBtn);
buttonPanel.add(deleteBtn);
buttonPanel.add(mainPageBtn);
content.add(scrollPane, BorderLayout.NORTH);
content.add(buttonPanel, BorderLayout.CENTER);
assignmentFrame.add(content);
assignmentFrame.setSize(500, 450);
assignmentFrame.setLocationRelativeTo(null);
assignmentFrame.setVisible(true);
}
private class AddAssignmentListener implements ActionListener {
@Override
public void actionPerformed(ActionEvent e) {
counter = counterSetter();
openAddPage();
}
}
private class DeleteAssignmentListener implements ActionListener {
@Override
public void actionPerformed(ActionEvent e) {
deleteTask();
}
}
private class MainPageListener implements ActionListener {
@Override
public void actionPerformed(ActionEvent e) {
assignmentFrame.setVisible(false);
tempMainFrame.setVisible(true);
tempMainFrame = null; // for GarbageCollector
}
}
private void openAddPage() {
addAssignmentFrame = new JFrame();
JPanel upPanel = new JPanel();
upPanel.setLayout(new BoxLayout(upPanel, BoxLayout.Y_AXIS));
JPanel downPanel = new JPanel();
downPanel.setLayout(new BorderLayout());
Font sanserif = new Font("sanserif", Font.BOLD, 15);
Font monospace = new Font("monospace", Font.BOLD, 15);
JLabel lecture = new JLabel("Lecture:");
lecture.setFont(sanserif);
lectureInput = new JTextField();
lectureInput.setFont(monospace);
upPanel.add(lecture);
upPanel.add(lectureInput);
JLabel target = new JLabel("Target:");
target.setFont(sanserif);
targetInput = new JTextArea(10, 20);
targetInput.setFont(monospace);
targetInput.setLineWrap(true);
targetInput.setWrapStyleWord(true);
JScrollPane scrollPane = new JScrollPane(targetInput);
scrollPane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
scrollPane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
JButton saveBtn = new JButton("Save");
saveBtn.addActionListener(new SaveButtonListener());
downPanel.add(target, BorderLayout.NORTH);
downPanel.add(scrollPane, BorderLayout.CENTER);
downPanel.add(saveBtn, BorderLayout.SOUTH);
addAssignmentFrame.add(upPanel, BorderLayout.NORTH);
addAssignmentFrame.add(downPanel, BorderLayout.CENTER);
addAssignmentFrame.setDefaultCloseOperation(JFrame.HIDE_ON_CLOSE);
addAssignmentFrame.pack();
addAssignmentFrame.setLocationRelativeTo(null);
addAssignmentFrame.setVisible(true);
}
private class SaveButtonListener implements ActionListener {
@Override
public void actionPerformed(ActionEvent e) {
addTask();
}
}
private void addTask() {
try {
FileWriter fileWriter = new FileWriter("assignments.txt", true);
BufferedWriter writer = new BufferedWriter(fileWriter);
String lectureInfo = lectureInput.getText();
String targetInfo = targetInput.getText();
if (!targetInfo.equals("") && !lectureInfo.equals("")) {
String task = counter + "- " + lectureInfo + "/" + targetInfo + "\n";
writer.write(task);
writer.close();
counter++;
} else {
JOptionPane.showMessageDialog(assignmentFrame, "You must fill both Lecture and Target",
"Warning", JOptionPane.WARNING_MESSAGE);
addAssignmentFrame.setVisible(false);
}
} catch(Exception ex) {
ex.printStackTrace();
}
printTasks();
addAssignmentFrame.setVisible(false);
}
private void printTasks() {
try {
FileReader fileReader = new FileReader("assignments.txt");
BufferedReader reader = new BufferedReader(fileReader);
String task;
String fullTask = "";
while((task = reader.readLine()) != null) {
if(task.length() > 0) {
String[] splittedTask = task.split("/");
if (splittedTask.length == 2 && !splittedTask[0].equals("") && !splittedTask[1].equals("")) {
String lecturePart = splittedTask[0].toUpperCase();
String definitionPart = splittedTask[1];
fullTask = fullTask + lecturePart + "\n" + definitionPart + "\n\n";
} else {
String errorMessage = "System Failure..\nProgram will be closed :(";
JOptionPane.showMessageDialog(assignmentFrame, errorMessage,
"System Error!", JOptionPane.ERROR_MESSAGE);
System.exit(0);
}
}
}
reader.close();
targetBoard.setText(fullTask);
} catch (Exception ex) {
ex.printStackTrace();
}
}
private void deleteTask() {
try {
counter = 1;
BufferedReader reader = new BufferedReader(new FileReader("assignments.txt"));
String row = null;
ArrayList<String> wholeText = new ArrayList<>();
String key = JOptionPane.showInputDialog(assignmentFrame, "Please enter assignment number",
"Delete", JOptionPane.INFORMATION_MESSAGE);
while((row = reader.readLine()) != null) {
if(row.length() > 1) {
if(!row.substring(0,1).equals(key)) {
row = counter + row.substring(1);
wholeText.add(row);
counter++;
}
}
}
BufferedWriter writer = new BufferedWriter(new FileWriter("assignments.txt"));
writer.close();
orderTaskList(wholeText);
reader.close();
printTasks();
} catch (Exception ex) {
ex.printStackTrace();
}
}
private void orderTaskList(ArrayList<String> wholeText) {
try {
BufferedWriter writer = new BufferedWriter(new FileWriter("assignments.txt", true));
for (String i : wholeText) {
i = i + "\n";
writer.write(i);
}
writer.close();
} catch(Exception ex) {
ex.printStackTrace();
}
}
private int counterSetter() {
int lastNum = 0;
try {
BufferedReader reader = new BufferedReader(new FileReader("assignments.txt"));
String row = null;
while((row = reader.readLine()) != null) {
if(row.length() > 0) {
lastNum = Integer.parseInt(row.substring(0, 1));
}
}
} catch (Exception ex) {
ex.printStackTrace();
}
return lastNum + 1;
}
}