An MVP Approach to Design

src/controller/Controller.java

@@ -0,0 +1,39 @@
+package controller;
+
+import java.io.File;
+import javax.swing.JFileChooser;
+import javax.swing.filechooser.FileNameExtensionFilter;
+
+import controller.actionlistener.OpenActionListener;
+import view.TextEditorFrame;
+import view.jmenuitem.BaseItem;
+
+/**
+ * Description
+ *
+ * @author swkumar (swkumar@groupon.com)
+ * @since 1.0.0
+ */
+public class Controller {
+    private final TextEditorFrame textEditorFrame = new TextEditorFrame();
+    private final JFileChooser fileExplorer = new JFileChooser();
+
+    public Controller() {
+        //You could create it's own controller that you can call in this big controller.
+        //something like JMenuItemController menuItemController = new JMenuItemController();
+        //menuItemController.control();
+        String filePath = "C:/Users/Dhruv/Desktop/Java Course Materials/"; //default file path name - yet to be given by professor!
+        fileExplorer.setCurrentDirectory(new File(filePath)); // 'Citation: From the problem statement (example)'
+        FileNameExtensionFilter filter = new FileNameExtensionFilter("Text files", "txt"); // Filter to accept only file with .txt extension
+        fileExplorer.setFileFilter(filter);
+
+        BaseItem openItem = textEditorFrame
+                .getTextEditorMenuBar()
+                .getFileMenu()
+                .getOpenItem();
+
+        textEditorFrame
+                .getTextEditorMenuBar()
+                .getFileMenu().addItemActionListener(openItem, new OpenActionListener(fileExplorer, textEditorFrame));
+    }
+}

src/controller/actionlistener/OpenActionListener.java

@@ -0,0 +1,78 @@
+package controller.actionlistener;
+
+import java.awt.Color;
+import java.awt.Font;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.io.File;
+import java.io.FileReader;
+import java.io.IOException;
+import javax.swing.JFileChooser;
+import javax.swing.JLabel;
+import javax.swing.JTextArea;
+import javax.swing.text.Highlighter;
+
+import view.TextEditorFrame;
+import view.jmenuitem.BaseItem;
+
+/**
+ * Description
+ *
+ * @author swkumar (swkumar@groupon.com)
+ * @since 1.0.0
+ */
+public class OpenActionListener implements ActionListener {
+    private Highlighter hl;
+    private BaseItem openItem;
+    private JFileChooser fileExplorer;
+    private JTextArea jta;
+    private JLabel label;
+
+
+    public OpenActionListener(JFileChooser fileExplorer, TextEditorFrame textEditorFrame) {
+        this.openItem = textEditorFrame.getTextEditorMenuBar().getFileMenu().getOpenItem();
+        this.fileExplorer = fileExplorer;
+        this.jta = ((JTextArea) textEditorFrame.getTextEditorScrollPane().getViewport().getView());
+        this.hl = jta.getHighlighter();
+        this.label = textEditorFrame.getLabel();
+    }
+
+    @Override
+    public void actionPerformed(ActionEvent e) {
+        hl.removeAllHighlights();
+        String getFileName;
+        String getFilePath;
+        if (e.getSource().equals(openItem)) { // action when user selects open menuitem
+            fileExplorer.setDialogTitle("Choose a File to open");
+            int result = fileExplorer.showOpenDialog(fileExplorer); // opening the open dialogue window
+            if (result == JFileChooser.APPROVE_OPTION) { // when user chooses open option
+                File file = fileExplorer.getSelectedFile();
+                getFilePath = fileExplorer.getSelectedFile().getPath(); //getting the complete path of the file
+                getFileName = fileExplorer.getSelectedFile().getName(); // getting the name of the file
+                FileReader fr;
+                try {
+                    fr = new FileReader(getFilePath);
+                    jta.setFont(new Font("Serif", Font.PLAIN, 20));
+                    jta.setBackground(Color.WHITE);
+                    jta.setBorder(null);
+                    jta.read(fr, null); // reading the file chosen by user
+                    label.setText("You have opened: " + getFileName + " file");
+
+                    //You can add these in later..
+                    /*searchMenu.removeAll();
+                    addSearchItems.clear();
+                    searchMenu.add(searchMenuItem);
+
+                    oldBookMarkMenu.removeAll();
+                    oldBookMarkItem1.removeAll();
+                    addSearchItems.clear();
+                    addSearchItemsSorted.clear();
+                    bookMarkPosition.clear();*/
+                } catch (IOException e1) {
+                    label.setText("System cannot find " + getFileName);
+                }
+            }
+        }
+
+    }
+}

src/view/TextEditorFrame.java

@@ -0,0 +1,53 @@
+package view;
+
+import java.awt.BorderLayout;
+import java.awt.Dimension;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+
+/**
+ * Description
+ *
+ * @author swkumar (swkumar@groupon.com)
+ * @since 1.0.0
+ */
+public class TextEditorFrame extends JFrame {
+    private static final String NAME = "Text Editor";
+    private TextEditorScrollPane textEditorScrollPane;
+    private TextEditorMenuBar textEditorMenuBar;
+    private JLabel label = new JLabel();
+
+    public TextEditorFrame() {
+        super(NAME);
+        initilaze();
+        setFrameSpecs();
+    }
+
+    private void initilaze() {
+        textEditorScrollPane = new TextEditorScrollPane();
+        textEditorMenuBar = new TextEditorMenuBar();
+        label.setPreferredSize(new Dimension(400, 20));
+        this.add(textEditorScrollPane, BorderLayout.CENTER);
+        this.setJMenuBar(textEditorMenuBar);
+        this.add(label, BorderLayout.PAGE_END);
+    }
+
+    private void setFrameSpecs() {
+        this.setLayout(new BorderLayout());
+        this.setSize(800, 500);
+        this.setVisible(true);
+        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+    }
+
+    public TextEditorScrollPane getTextEditorScrollPane() {
+        return textEditorScrollPane;
+    }
+
+    public TextEditorMenuBar getTextEditorMenuBar() {
+        return textEditorMenuBar;
+    }
+
+    public JLabel getLabel() {
+        return label;
+    }
+}

src/view/TextEditorMenuBar.java

@@ -0,0 +1,29 @@
+package view;
+
+import javax.swing.JMenuBar;
+
+import view.jmenu.FileMenu;
+
+/**
+ * Description
+ *
+ * @author swkumar (swkumar@groupon.com)
+ * @since 1.0.0
+ */
+public class TextEditorMenuBar extends JMenuBar {
+    private FileMenu fileMenu;
+
+    public TextEditorMenuBar() {
+        initialize();
+    }
+
+    private void initialize() {
+        fileMenu = new FileMenu();
+        this.add(fileMenu);
+    }
+
+    public FileMenu getFileMenu() {
+        return fileMenu;
+    }
+}
+

src/view/TextEditorScrollPane.java

@@ -0,0 +1,17 @@
+package view;
+
+import javax.swing.JScrollPane;
+
+/**
+ * Description
+ *
+ * @author swkumar (swkumar@groupon.com)
+ * @since 1.0.0
+ */
+public class TextEditorScrollPane extends JScrollPane {
+
+    public TextEditorScrollPane() {
+        super(new TextEditorTextArea(), JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
+    }
+
+}

src/view/TextEditorTextArea.java

@@ -0,0 +1,23 @@
+package view;
+
+import java.awt.Font;
+import javax.swing.JTextArea;
+
+/**
+ * Description
+ *
+ * @author swkumar (swkumar@groupon.com)
+ * @since 1.0.0
+ */
+public class TextEditorTextArea extends JTextArea {
+    private final static int ROWS = 20;
+    private final static int COLS = 60;
+
+    public TextEditorTextArea() {
+        super(ROWS, COLS);
+        setEditable(true);
+        setWrapStyleWord(true);
+        setLineWrap(true);
+        setFont(new Font("Serif", Font.PLAIN, 20));
+    }
+}

src/view/jmenu/FileMenu.java

@@ -0,0 +1,69 @@
+package view.jmenu;
+
+import java.awt.event.ActionListener;
+import javax.swing.JMenu;
+
+import view.jmenuitem.BaseItem;
+import view.jmenuitem.CloseItem;
+import view.jmenuitem.ExitItem;
+import view.jmenuitem.OpenItem;
+import view.jmenuitem.SaveAsItem;
+import view.jmenuitem.SaveItem;
+
+/**
+ * Description
+ *
+ * @author swkumar (swkumar@groupon.com)
+ * @since 1.0.0
+ */
+public class FileMenu extends JMenu {
+    private static final String NAME = "File";
+    private OpenItem openItem;
+    private CloseItem closeItem;
+    private SaveAsItem saveAsItem;
+    private SaveItem saveItem;
+    private ExitItem exitItem;
+
+    public FileMenu() {
+        super(NAME);
+        openItem = new OpenItem();
+        closeItem = new CloseItem();
+        saveAsItem = new SaveAsItem();
+        saveItem = new SaveItem();
+        exitItem = new ExitItem();
+        this.add(openItem);
+        this.addSeparator();
+        this.add(closeItem);
+        this.addSeparator();
+        this.add(saveAsItem);
+        this.addSeparator();
+        this.add(saveItem);
+        this.addSeparator();
+        this.add(exitItem);
+        this.addSeparator();
+    }
+
+    public void addItemActionListener(BaseItem item, ActionListener listener) {
+        item.addActionListener(listener);
+    }
+
+    public OpenItem getOpenItem() {
+        return openItem;
+    }
+
+    public CloseItem getCloseItem() {
+        return closeItem;
+    }
+
+    public SaveAsItem getSaveAsItem() {
+        return saveAsItem;
+    }
+
+    public SaveItem getSaveItem() {
+        return saveItem;
+    }
+
+    public ExitItem getExitItem() {
+        return exitItem;
+    }
+}

src/view/jmenuitem/BaseItem.java

@@ -0,0 +1,16 @@
+package view.jmenuitem;
+
+import javax.swing.JMenuItem;
+
+/**
+ * Description
+ *
+ * @author swkumar (swkumar@groupon.com)
+ * @since 1.0.0
+ */
+public class BaseItem extends JMenuItem {
+
+    protected BaseItem(String name) {
+        super(name);
+    }
+}

src/view/jmenuitem/CloseItem.java

@@ -0,0 +1,14 @@
+package view.jmenuitem;
+
+/**
+ * Description
+ *
+ * @author swkumar (swkumar@groupon.com)
+ * @since 1.0.0
+ */
+public class CloseItem extends BaseItem {
+
+    public CloseItem() {
+        super("Close");
+    }
+}

src/view/jmenuitem/ExitItem.java

@@ -0,0 +1,13 @@
+package view.jmenuitem;
+
+/**
+ * Description
+ *
+ * @author swkumar (swkumar@groupon.com)
+ * @since 1.0.0
+ */
+public class ExitItem extends BaseItem {
+    public ExitItem() {
+        super("Exit");
+    }
+}

src/view/jmenuitem/OpenItem.java

@@ -0,0 +1,14 @@
+package view.jmenuitem;
+
+/**
+ * Description
+ *
+ * @author swkumar (swkumar@groupon.com)
+ * @since 1.0.0
+ */
+public class OpenItem extends BaseItem {
+
+    public OpenItem() {
+        super("Open...");
+    }
+}

src/view/jmenuitem/SaveAsItem.java

@@ -0,0 +1,13 @@
+package view.jmenuitem;
+
+/**
+ * Description
+ *
+ * @author swkumar (swkumar@groupon.com)
+ * @since 1.0.0
+ */
+public class SaveAsItem extends BaseItem {
+    public SaveAsItem() {
+        super("Save as...");
+    }
+}