Implement GUI

build.gradle

@@ -3,6 +3,7 @@ plugins {
     id 'application'
     id 'checkstyle'
     id 'com.github.johnrengelman.shadow' version '5.1.0'
+    id 'org.openjfx.javafxplugin' version '0.0.7'
 }
 
 checkstyle {
@@ -39,3 +40,10 @@ dependencies {
 test {
     useJUnitPlatform()
 }
+
+javafx {
+    version = "11.0.2"
+    modules = [ 'javafx.controls', 'javafx.fxml' ]
+}
+
+mainClassName = 'Launcher'

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,6 @@
+#Tue Sep 10 00:41:03 SGT 2019
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.5.1-all.zip
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.5.1-bin.zip
-zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME

src/main/java/DialogBox.java

@@ -0,0 +1,59 @@
+import java.io.IOException;
+import java.util.Collections;
+
+import javafx.collections.FXCollections;
+import javafx.collections.ObservableList;
+import javafx.fxml.FXML;
+import javafx.fxml.FXMLLoader;
+import javafx.geometry.Pos;
+import javafx.scene.Node;
+import javafx.scene.control.Label;
+import javafx.scene.image.Image;
+import javafx.scene.image.ImageView;
+import javafx.scene.layout.HBox;
+
+/**
+ * An example of a custom control using FXML.
+ * This control represents a dialog box consisting of an ImageView to represent the speaker's face and a label
+ * containing text from the speaker.
+ */
+public class DialogBox extends HBox {
+    @FXML
+    private Label dialog;
+    @FXML
+    private ImageView displayPicture;
+
+    private DialogBox(String text, Image img) {
+        try {
+            FXMLLoader fxmlLoader = new FXMLLoader(MainWindow.class.getResource("/view/DialogBox.fxml"));
+            fxmlLoader.setController(this);
+            fxmlLoader.setRoot(this);
+            fxmlLoader.load();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+        dialog.setText(text);
+        displayPicture.setImage(img);
+    }
+
+    /**
+     * Flips the dialog box such that the ImageView is on the left and text on the right.
+     */
+    private void flip() {
+        ObservableList<Node> tmp = FXCollections.observableArrayList(this.getChildren());
+        Collections.reverse(tmp);
+        getChildren().setAll(tmp);
+        setAlignment(Pos.TOP_LEFT);
+    }
+
+    public static DialogBox getUserDialog(String text, Image img) {
+        return new DialogBox(text, img);
+    }
+
+    public static DialogBox getDukeDialog(String text, Image img) {
+        var db = new DialogBox(text, img);
+        db.flip();
+        return db;
+    }
+}

src/main/java/Duke.java

@@ -1,22 +1,50 @@
 import java.io.FileNotFoundException;
 import java.io.IOException;
 
+import javafx.application.Application;
+import javafx.application.Platform;
+import javafx.scene.Scene;
+import javafx.scene.control.Button;
+import javafx.scene.control.Label;
+import javafx.scene.control.ScrollPane;
+import javafx.scene.control.TextField;
+import javafx.scene.image.Image;
+import javafx.scene.image.ImageView;
+import javafx.scene.layout.AnchorPane;
+import javafx.scene.layout.Region;
+import javafx.scene.layout.VBox;
+import javafx.stage.Stage;
+
 /**
  * Encapsulates a Duke object for the execution of the Duke program.
  */
-public class Duke {
+public class Duke extends Application {
 
     private Storage storage;
     private TaskList tasks;
-    private Ui ui;
+    public Ui ui;
+    private ScrollPane scrollPane;
+    private VBox dialogContainer;
+    private TextField userInput;
+    private Button sendButton;
+    private Scene scene;
+    private Image user = new Image(this.getClass().getResourceAsStream("/images/User.jpg"));
+    private Image duke = new Image(this.getClass().getResourceAsStream("/images/Duke.jpg"));
+    private boolean isExit;
+
+    public Duke() {
+
+    }
 
     /**
      * Creates a Duke object tagged with ui, storage and list of tasks.
      *
      * @param filePath path of file to be used as storage.
      */
+
     public Duke(String filePath) {
         ui = new Ui();
+        isExit = false;
         try {
             storage = new Storage(filePath);
         } catch (FileNotFoundException e) {
@@ -34,24 +62,123 @@ public Duke(String filePath) {
     /**
      * Runs the Duke program.
      */
-    public void run() {
-        ui.showWelcome();
-        boolean isExit = false;
-        while (!isExit) {
-            ui.execute(tasks);
-            isExit = ui.isExit();
+    public String run(String command) {
+        String message = ui.execute(command, tasks);
+        isExit = ui.isExit();
+        if (isExit) {
+            try {
+                storage.store();
+            } catch (IOException e) {
+                ui.showError("store");
+            }
+            return ui.exit();
+        } else {
+            return message;
         }
+    }
 
-        try {
-            storage.store();
-        } catch (IOException e) {
-            ui.showError("store");
-        }
+    public boolean isExit() {
+        return isExit;
+    }
+
+    @Override
+    public void start(Stage stage) {
+        //Step 1. Setting up required components
+
+        //The container for the content of the chat to scroll.
+        scrollPane = new ScrollPane();
+        dialogContainer = new VBox();
+        scrollPane.setContent(dialogContainer);
+
+        userInput = new TextField();
+        sendButton = new Button("Send");
+
+        AnchorPane mainLayout = new AnchorPane();
+        mainLayout.getChildren().addAll(scrollPane, userInput, sendButton);
+
+        scene = new Scene(mainLayout);
+
+        stage.setScene(scene);
+        stage.show();
+
+        //Step 2. Formatting the window to look as expected
+        stage.setTitle("Duke");
+        stage.setResizable(false);
+        stage.setMinHeight(600.0);
+        stage.setMinWidth(400.0);
+
+        mainLayout.setPrefSize(400.0, 600.0);
+
+        scrollPane.setPrefSize(385, 535);
+        scrollPane.setHbarPolicy(ScrollPane.ScrollBarPolicy.NEVER);
+        scrollPane.setVbarPolicy(ScrollPane.ScrollBarPolicy.ALWAYS);
+
+        scrollPane.setVvalue(1.0);
+        scrollPane.setFitToWidth(true);
 
-        ui.exit();
+        // You will need to import `javafx.scene.layout.Region` for this.
+        dialogContainer.setPrefHeight(Region.USE_COMPUTED_SIZE);
+
+        userInput.setPrefWidth(325.0);
+
+        sendButton.setPrefWidth(55.0);
+
+        AnchorPane.setTopAnchor(scrollPane, 1.0);
+
+        AnchorPane.setBottomAnchor(sendButton, 1.0);
+        AnchorPane.setRightAnchor(sendButton, 1.0);
+
+        AnchorPane.setLeftAnchor(userInput , 1.0);
+        AnchorPane.setBottomAnchor(userInput, 1.0);
+
+        //Step 3. Add functionality to handle user input.
+        sendButton.setOnMouseClicked((event) -> {
+            handleUserInput();
+        });
+
+        userInput.setOnAction((event) -> {
+            handleUserInput();
+        });
+
+        //Scroll down to the end every time dialogContainer's height changes.
+        dialogContainer.heightProperty().addListener((observable) -> scrollPane.setVvalue(1.0));
     }
 
-    public static void main(String[] args) {
-        new Duke("/Users/jingrong/duke/duke.txt").run();
+    /**
+     * Iteration 1:
+     * Creates a label with the specified text and adds it to the dialog container.
+     * @param text String containing text to add
+     * @return a label with the specified text that has word wrap enabled.
+     */
+    private Label getDialogLabel(String text) {
+        // You will need to import `javafx.scene.control.Label`.
+        Label textToAdd = new Label(text);
+        textToAdd.setWrapText(true);
+
+        return textToAdd;
+    }
+
+    /**
+     * Iteration 2:
+     * Creates two dialog boxes, one echoing user input and the other containing Duke's reply and then appends them to
+     * the dialog container. Clears the user input after processing.
+     */
+    private void handleUserInput() {
+        Label userText = new Label(userInput.getText());
+        Label dukeText = new Label(getResponse(userInput.getText()));
+        dialogContainer.getChildren().addAll(
+                DialogBox.getUserDialog(userInput.getText(), user),
+                DialogBox.getDukeDialog(getResponse(userInput.getText()), duke)
+        );
+        userInput.clear();
+    }
+
+    /**
+     * You should have your own function to generate a response to user input.
+     * Replace this stub with your completed method.
+     */
+    public String getResponse(String input) {
+        //new Duke("/Users/jingrong/duke/duke.txt").run();
+        return "Duke heard: " + input;
     }
 }

src/main/java/Launcher.java

@@ -0,0 +1,10 @@
+import javafx.application.Application;
+
+/**
+ * A launcher class to workaround classpath issues.
+ */
+public class Launcher {
+    public static void main(String[] args) {
+        Application.launch(Main.class, args);
+    }
+}

src/main/java/Main.java

@@ -0,0 +1,31 @@
+//@Override
+import java.io.IOException;
+
+import javafx.application.Application;
+import javafx.fxml.FXMLLoader;
+import javafx.scene.Scene;
+import javafx.scene.layout.AnchorPane;
+import javafx.stage.Stage;
+
+/**
+ * A GUI for Duke using FXML.
+ */
+public class Main extends Application {
+
+    private Duke duke = new Duke("/Users/jingrong/duke/duke.txt");
+
+    @Override
+    public void start(Stage stage) {
+        try {
+            FXMLLoader fxmlLoader = new FXMLLoader(Main.class.getResource("/view/MainWindow.fxml"));
+            AnchorPane ap = fxmlLoader.load();
+            Scene scene = new Scene(ap);
+            stage.setScene(scene);
+            fxmlLoader.<MainWindow>getController().setDuke(duke);
+            stage.show();
+
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+}

src/main/java/MainWindow.java

@@ -0,0 +1,56 @@
+import javafx.application.Platform;
+import javafx.fxml.FXML;
+import javafx.scene.control.Button;
+import javafx.scene.control.Label;
+import javafx.scene.control.ScrollPane;
+import javafx.scene.control.TextField;
+import javafx.scene.image.Image;
+import javafx.scene.layout.AnchorPane;
+import javafx.scene.layout.VBox;
+import javafx.scene.layout.HBox;
+
+/**
+ * Controller for MainWindow. Provides the layout for the other controls.
+ */
+public class MainWindow extends AnchorPane {
+    @FXML
+    private ScrollPane scrollPane;
+    @FXML
+    private VBox dialogContainer;
+    @FXML
+    private TextField userInput;
+    @FXML
+    private Button sendButton;
+
+    private Duke duke;
+
+    private Image userImage = new Image(this.getClass().getResourceAsStream("/images/User.jpg"));
+    private Image dukeImage = new Image(this.getClass().getResourceAsStream("/images/Duke.jpg"));
+
+    @FXML
+    public void initialize() {
+        scrollPane.vvalueProperty().bind(dialogContainer.heightProperty());
+        dialogContainer.getChildren().addAll(
+                DialogBox.getDukeDialog(new Ui().showWelcome(), dukeImage)
+        );
+    }
+
+    public void setDuke(Duke d) {
+        duke = d;
+    }
+
+    /**
+     * Creates two dialog boxes, one echoing user input and the other containing Duke's reply and then appends them to
+     * the dialog container. Clears the user input after processing.
+     */
+    @FXML
+    private void handleUserInput() {
+        String input = userInput.getText();
+        String response = duke.run(input);
+        dialogContainer.getChildren().addAll(
+                DialogBox.getUserDialog(input, userImage),
+                DialogBox.getDukeDialog(response, dukeImage)
+        );
+        userInput.clear();
+    }
+}