implemented "DO A BARREL ROLL!" - Easteregg

src/main/java/envoy/client/ui/controller/ChatScene.java

@@ -6,21 +6,26 @@ import java.io.ByteArrayInputStream;
 import java.io.File;
 import java.io.IOException;
 import java.nio.file.Files;
+import java.util.Random;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 import java.util.stream.Collectors;
 
+import javafx.animation.RotateTransition;
 import javafx.application.Platform;
 import javafx.collections.FXCollections;
 import javafx.fxml.FXML;
+import javafx.scene.Node;
 import javafx.scene.control.*;
 import javafx.scene.control.Alert.AlertType;
 import javafx.scene.image.Image;
 import javafx.scene.image.ImageView;
 import javafx.scene.input.KeyCode;
 import javafx.scene.input.KeyEvent;
+import javafx.scene.layout.GridPane;
 import javafx.scene.paint.Color;
 import javafx.stage.FileChooser;
+import javafx.util.Duration;
 
 import envoy.client.data.*;
 import envoy.client.data.audio.AudioRecorder;
@@ -50,6 +55,9 @@ import envoy.util.EnvoyLog;
  */
 public final class ChatScene implements Restorable {
 
+	@FXML
+	private GridPane scene;
+
 	@FXML
 	private Label contactLabel;
 
@@ -71,6 +79,9 @@ public final class ChatScene implements Restorable {
 	@FXML
 	private Button settingsButton;
 
+	@FXML
+	private Button rotateButton;
+
 	@FXML
 	private TextArea messageTextArea;
 
@@ -121,6 +132,7 @@ public final class ChatScene implements Restorable {
 		voiceButton.setGraphic(new ImageView(IconUtil.loadIconThemeSensitive("microphone", DEFAULT_ICON_SIZE)));
 		attachmentButton.setGraphic(new ImageView(IconUtil.loadIconThemeSensitive("attachment", DEFAULT_ICON_SIZE)));
 		attachmentView.setImage(DEFAULT_ATTACHMENT_VIEW_IMAGE);
+		rotateButton.setGraphic(new ImageView(IconUtil.loadIconThemeSensitive("rotate", (int) (DEFAULT_ICON_SIZE * 1.5))));
 
 		// Listen to received messages
 		eventBus.register(MessageCreationEvent.class, e -> {
@@ -346,6 +358,28 @@ public final class ChatScene implements Restorable {
 		}
 	}
 
+	/**
+	 * Rotates every element in our application by 360° in at most 2.75s.
+	 * 
+	 * @since Envoy Client v0.1-beta
+	 */
+	@FXML
+	private void doABarrelRoll() {
+		// contains all Node objects in ChatScene in alphabetical order
+		final var	rotatableNodes	= new Node[] { attachmentButton, attachmentView, contactLabel, infoLabel, messageList, messageTextArea,
+				postButton, remainingChars, rotateButton, scene, settingsButton, userList, voiceButton };
+		final var	random			= new Random();
+		for (final var node : rotatableNodes) {
+			// Defines one whole rotation in at most 2.75s
+			final var rotateTransition = new RotateTransition(Duration.seconds(random.nextDouble() * 2.25 + 0.5), node);
+			rotateTransition.setByAngle(360);
+			rotateTransition.play();
+			// This is needed as for some strange reason objects could stop before being
+			// rotated back to 0°
+			rotateTransition.setOnFinished(e -> node.setRotate(0));
+		}
+	}
+
 	/**
 	 * Checks the text length of the {@code messageTextArea}, adjusts the
 	 * {@code remainingChars} label and checks whether to send the message

src/main/resources/fxml/ChatScene.fxml

@@ -15,9 +15,10 @@
 <?import javafx.scene.layout.GridPane?>
 <?import javafx.scene.layout.RowConstraints?>
 
-<GridPane hgap="5.0" maxHeight="-Infinity" maxWidth="-Infinity"
-	minHeight="400.0" minWidth="350.0" prefHeight="400.0" prefWidth="600.0"
-	vgap="2.0" xmlns="http://javafx.com/javafx/11.0.1"
+<GridPane fx:id="scene" hgap="5.0" maxHeight="-Infinity"
+	maxWidth="-Infinity" minHeight="400.0" minWidth="350.0"
+	prefHeight="400.0" prefWidth="600.0" vgap="2.0"
+	xmlns="http://javafx.com/javafx/11.0.1"
 	xmlns:fx="http://javafx.com/fxml/1"
 	fx:controller="envoy.client.ui.controller.ChatScene">
 	<columnConstraints>
@@ -99,6 +100,12 @@
 				<Insets right="10.0" />
 			</GridPane.margin>
 			<buttons>
+				<Button fx:id="rotateButton" mnemonicParsing="false"
+					onAction="#doABarrelRoll">
+					<padding>
+						<Insets bottom="5.0" left="5.0" right="5.0" top="5.0" />
+					</padding>
+				</Button>
 				<Button fx:id="attachmentButton" disable="true"
 					mnemonicParsing="false" onAction="#attachmentButtonClicked">
 					<padding>