Final report2

import java.util.ArrayList;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ComboBox;
import javafx.scene.control.Label;
import javafx.scene.control.RadioButton;
import javafx.scene.control.TextField;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
import java.io.*;


public class Main extends Application implements EventHandler<ActionEvent>{
	Scene scene;
	Label correctOrNo;
	Button Create1, Create2, Edit1, Edit2, Delete, cancelCreate,cancelEdit;
	RadioButton answer1,answer2,ans1,ans2,editAns1,editAns2;

    TextField createText  = new TextField();
    TextField createAnswer1 = new TextField();
    TextField createAnswer2 = new TextField();

    TextField editText = new TextField();
    TextField editAnswer1 = new TextField();
    TextField editAnswer2 = new TextField();

    VBox answers = new VBox(10);
	VBox createButton = new VBox(5);
	VBox EditButton = new VBox(5);
    HBox buttons = new HBox(10);
	HBox viewQues = new HBox(50);
    HBox createCancel = new HBox(5);
    HBox editCancel = new HBox(5);
    HBox createAnswers1 = new HBox(5);
    HBox createAnswers2 = new HBox(5);
    HBox correctAnswre1 = new HBox(5);
    HBox correctAnswre2 = new HBox(5);

	BorderPane pane = new BorderPane();
    static ArrayList<String> questions = new ArrayList<>();
    static ArrayList<String> viewQuestions = new ArrayList<>();

	private ComboBox<String> combo = new ComboBox<String>();

    @Override
    public void start(Stage primaryStage) throws IOException {
        //To read old file contents and save it in the array list
        try {
    		DataInputStream input = new DataInputStream(new FileInputStream("QuestionBank.dat"));
            String temp;
            while((temp = input.readUTF()) != null) {
            	questions.add(temp);
            }
        }
        catch(Exception e) {}



    	primaryStage.setTitle("Bank Creator");
    	Create1 = new Button("Create");
    	Create2 = new Button("Create new question");

		createText.setPromptText("Write Your Question Here");
		createAnswer1.setPromptText("Write Answer 1");
		createAnswer2.setPromptText("Write Answer 1");

    	Edit1 = new Button("Edit");
		Edit1.setDisable(true);
    	Edit2 = new Button("Edit");

    	Delete = new Button("Delete");
    	Delete.setDisable(true);
    	cancelCreate = new Button("Cancel");
    	cancelEdit = new Button("Cancel");

    	createCancel.getChildren().addAll(Create2,cancelCreate);
    	editCancel.getChildren().addAll(Edit2,cancelEdit);

    	ans1 = new RadioButton("Answer 1");
    	ans2 = new RadioButton("Answer 2");
    	correctAnswre1.getChildren().addAll(new Label("Which answer is correct?"),ans1,ans2);
        createAnswers1.getChildren().addAll(createAnswer1, createAnswer2);
        createAnswers1.setAlignment(Pos.BOTTOM_CENTER);
    	createButton.getChildren().addAll(createText ,createAnswers1,correctAnswre1,createCancel);

    	editAns1 = new RadioButton("Answer 1");
    	editAns2 = new RadioButton("Answer 2");
    	correctAnswre2.getChildren().addAll(new Label("Which answer is correct?"),editAns1,editAns2);
        createAnswers2.getChildren().addAll(new Label("Answer 1 "),editAnswer1,new Label("Answer 2 "),editAnswer2);
        createAnswers2.setAlignment(Pos.BOTTOM_CENTER);
    	EditButton.getChildren().addAll(editText ,createAnswers2,correctAnswre2, editCancel);

    	correctOrNo = new Label();
    	answer1 = new RadioButton("Answer 1");
    	answer2 = new RadioButton("Answer 2");
        answers.getChildren().addAll(answer1 , answer2,correctOrNo);

        answers.setAlignment(Pos.CENTER_LEFT);

        buttons.getChildren().addAll(Create1 , Edit1, Delete);
        buttons.setAlignment(Pos.CENTER);


    	//Add only questions to viewQuestions ArrayList to view them in the combo box
    	for (int i =0 ; i < questions.size() ; i++) {
    		String temp = questions.get(i);
    		viewQuestions.add(temp.split(":")[0]);
    	}
    	combo.getItems().addAll(viewQuestions);
    	combo.setValue("Choose a question");


    	viewQues.getChildren().addAll(new Label("View Questions: "),combo);
    	pane.setPadding(new Insets(10,10,10,10));
    	pane.setTop(viewQues);
    	pane.setBottom(buttons);

    	//--------------------------------------------------------------
    	Create1.setOnAction(this);
    	Create2.setOnAction(this);
    	Delete.setOnAction(this);
    	Edit1.setOnAction(this);
    	Edit2.setOnAction(this);
    	combo.setOnAction(this);
    	answer1.setOnAction(this);
    	answer2.setOnAction(this);
        ans1.setOnAction(this);
        ans2.setOnAction(this);
        editAns1.setOnAction(this);
        editAns2.setOnAction(this);
        cancelCreate.setOnAction(this);
        cancelEdit.setOnAction(this);
    	scene = new Scene(pane, 450, 250);
    	primaryStage.setScene(scene);
    	primaryStage.show();
    }


	@Override
	public void handle(ActionEvent event){

		//Create 1 button
		if (event.getSource() == Create1) {
			pane.setBottom(createButton);
	        pane.setCenter(null);
		}

		//Create 2 button
		if (event.getSource() == Create2) {
        	int correctAnswer;
        	if (ans1.isSelected())
        		correctAnswer = 1;
        	else
        		correctAnswer = 2;

        	combo.getItems().add(createText.getText());

        	// Question:Answer1:Answer2:CorrectAnswer(Answer 1 or 2) ==> Add this form to questions ArrayList
        	questions.add(createText.getText() + ":" + createAnswer1.getText() + ":" + createAnswer2.getText() + ":" + correctAnswer);
        	viewQuestions.add(createText.getText());
			pane.setBottom(buttons);
	    	pane.setCenter(answers);
	    	answer1.setSelected(false);
	    	answer2.setSelected(false);
	    	correctOrNo.setText("");
	    	combo.setValue(createText.getText());
        	writeQuesions();

		}

		//Delete button

		if (event.getSource() == Delete) {
	    	String temp = combo.getValue();
	        int pos = combo.getItems().indexOf(temp);
	        questions.remove(pos);
		    combo.getItems().remove(viewQuestions.get(pos));
	        viewQuestions.remove(pos);
	        writeQuesions();
	        if(pane.getCenter() != null)
	            pane.setCenter(null);

			}


		//Edit 1 button
		if (event.getSource() == Edit1) {

    		pane.setBottom(EditButton);
    	    pane.setCenter(null);
    	    editText.setText(combo.getValue());
    	    editAnswer1.setText(answer1.getText());
    	    editAnswer2.setText(answer2.getText());


		}

		//Edit 2 button
		if (event.getSource() == Edit2) {
			int pos = combo.getItems().indexOf(combo.getValue());
			String[] answer = questions.get(pos).split(":");

    		combo.getItems().set(pos, editText.getText());
    		answer1.setText(editAnswer1.getText());
    		answer2.setText(editAnswer2.getText());

        	int correctAnswer;
        	if (editAns1.isSelected())
        		correctAnswer = 1;
        	else
        		correctAnswer = 2;


    		String question = editText.getText() + ":" + editAnswer1.getText() + ":" + editAnswer2.getText() + ":" + correctAnswer;
    		questions.set(pos, question);
			pane.setBottom(buttons);
	    	pane.setCenter(answers);
	    	answer1.setSelected(false);
	    	answer2.setSelected(false);
	    	correctOrNo.setText("");
        	writeQuesions();


		}

		//Combo Box
		if (event.getSource() == combo) {
			try {
				if (combo.getValue() == null) {
	        		Edit1.setDisable(true);
	    			Delete.setDisable(true);
			    	pane.setCenter(null);

				}
				int pos = combo.getItems().indexOf(combo.getValue());
				String[] answer = questions.get(pos).split(":");
		    	pane.setCenter(answers);
		    	answer1.setText(answer[1]);
		    	answer2.setText(answer[2]);
				answer1.setSelected(false);
				answer2.setSelected(false);
				correctOrNo.setText("");
	    		Edit1.setDisable(false);
				Delete.setDisable(false);
			}catch(Exception e) {}
		}

		// View Answer 1
		if (event.getSource() == answer1) {
			try {

			int pos = combo.getItems().indexOf(combo.getValue());
			String[] answer = questions.get(pos).split(":");

			if(answer1.isSelected())
				answer2.setSelected(false);

			if((Integer.parseInt(answer[3]) == 1 && answer1.isSelected()) || (Integer.parseInt(answer[3]) == 2 && answer2.isSelected()))
				correctOrNo.setText("Answer is correct");
			else {
				correctOrNo.setText("Wrong answer!");
			}
			if(answer1.isSelected() == false && answer2.isSelected() == false)
				correctOrNo.setText("");

			}catch(Exception e){}


		}

		// View Answer 2
		if (event.getSource() == answer2) {
			try {
			int pos = combo.getItems().indexOf(combo.getValue());
			String[] answer = questions.get(pos).split(":");

			if(answer2.isSelected())
				answer1.setSelected(false);

			if((Integer.parseInt(answer[3]) == 1 && answer1.isSelected()) || (Integer.parseInt(answer[3]) == 2 && answer2.isSelected()))
				correctOrNo.setText("Answer is correct");
			else {
				correctOrNo.setText("Wrong answer!");
			}
			if(answer1.isSelected() == false && answer2.isSelected() == false)
				correctOrNo.setText("");


			}catch(Exception e){}

		}

		// Create Answer 1
		if (event.getSource() == ans1) {
			if(ans1.isSelected())
				ans2.setSelected(false);
		}

		// Create Answer 2
		if (event.getSource() == ans2) {
			if(ans2.isSelected())
				ans1.setSelected(false);
		}

		// Edit Answer 1
		if (event.getSource() == editAns1) {
			if(editAns1.isSelected())
				editAns2.setSelected(false);
		}

		// Edit Answer 2
		if (event.getSource() == editAns2) {
			if(editAns2.isSelected())
				editAns1.setSelected(false);
		}

		// Cancel creating button
		if(event.getSource() == cancelCreate) {
			pane.setBottom(buttons);

		}

		// Cancel editing button
		if(event.getSource() == cancelEdit) {
			pane.setBottom(buttons);
		}

	}


    //This method to write the questions in the binary file
    public static void writeQuesions() {
        try {
    		DataOutputStream output = new DataOutputStream(new FileOutputStream("QuestionBank.dat"));
    		for(int i = 0 ; i < questions.size() ; i++) {
    			output.writeUTF(questions.get(i));;
    		}
        }
        catch(Exception e) {}
    }



	public static void main(String[] args) {
        launch(args);
    }
}