Prepare JavaFX integration

* Added JavaFX and FXML dependencies to pom.xml and module-info.java
* Added Startup Application
* Added ChatScene with ChatSceneController

pom.xml

@@ -30,6 +30,16 @@
 			<artifactId>envoy-common</artifactId>
 			<version>develop-SNAPSHOT</version>
 		</dependency>
+		<dependency>
+			<groupId>org.openjfx</groupId>
+			<artifactId>javafx-controls</artifactId>
+			<version>11.0.2</version>
+		</dependency>
+		<dependency>
+			<groupId>org.openjfx</groupId>
+			<artifactId>javafx-fxml</artifactId>
+			<version>11.0.2</version>
+		</dependency>
 	</dependencies>
 
 	<build>

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

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<?import javafx.scene.control.Button?>
+<?import javafx.scene.control.Label?>
+<?import javafx.scene.control.ListView?>
+<?import javafx.scene.layout.ColumnConstraints?>
+<?import javafx.scene.layout.GridPane?>
+<?import javafx.scene.layout.RowConstraints?>
+
+<GridPane id="recipientLabel" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/11.0.1" xmlns:fx="http://javafx.com/fxml/1" fx:controller="envoy.client.ui.ChatSceneController">
+	<columnConstraints>
+		<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
+		<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
+	</columnConstraints>
+	<rowConstraints>
+		<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
+		<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
+		<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
+	</rowConstraints>
+	<children>
+		<ListView id="userList" prefHeight="211.0" prefWidth="300.0" GridPane.rowIndex="2" />
+		<Label text="Label" />
+		<Button id="settingsButton" mnemonicParsing="false" text="Settings" GridPane.columnIndex="1" />
+		<ListView id="messageList" prefHeight="200.0" prefWidth="200.0" GridPane.columnIndex="1" GridPane.rowIndex="1" />
+		<Button id="postButton" mnemonicParsing="false" text="Post" GridPane.columnIndex="1" GridPane.rowIndex="2" />
+	</children>
+</GridPane>

src/main/java/envoy/client/ui/ChatSceneController.java

@@ -0,0 +1,30 @@
+package envoy.client.ui;
+
+import java.util.logging.Logger;
+
+import envoy.util.EnvoyLog;
+import javafx.event.ActionEvent;
+import javafx.fxml.FXML;
+
+/**
+ * Project: <strong>envoy-client</strong><br>
+ * File: <strong>ChatSceneController.java</strong><br>
+ * Created: <strong>26.03.2020</strong><br>
+ * 
+ * @author Kai S. K. Engelbart
+ * @since Envoy Client v0.1-beta
+ */
+public class ChatSceneController {
+
+	private static final Logger logger = EnvoyLog.getLogger(ChatSceneController.class);
+
+	@FXML
+	public void postButtonClicked(ActionEvent e) {
+		logger.info("Post Button clicked.");
+	}
+
+	@FXML
+	public void settingsButtonClicked(ActionEvent e) {
+		logger.info("Settings Button clicked.");
+	}
+}

src/main/java/envoy/client/ui/Startup.java

@@ -0,0 +1,34 @@
+package envoy.client.ui;
+
+import javafx.application.Application;
+import javafx.fxml.FXMLLoader;
+import javafx.scene.Scene;
+import javafx.scene.layout.GridPane;
+import javafx.stage.Stage;
+
+/**
+ * Project: <strong>envoy-client</strong><br>
+ * File: <strong>Startup.java</strong><br>
+ * Created: <strong>26.03.2020</strong><br>
+ * 
+ * @author Kai S. K. Engelbart
+ * @since Envoy Client v0.1-beta
+ */
+public final class Startup extends Application {
+
+	/**
+	 * {@inheritDoc}
+	 */
+	@Override
+	public void start(Stage primaryStage) throws Exception {
+		var	loader		= new FXMLLoader(getClass().getResource("ChatScene.fxml"));
+		var	anchorPane	= loader.<GridPane>load();
+		
+		var chatScene = new Scene(anchorPane);
+		primaryStage.setTitle("Envoy");
+		primaryStage.setScene(chatScene);
+		primaryStage.show();
+	}
+
+	public static void main(String[] args) { launch(args); }
+}

src/main/java/module-info.java

@@ -14,4 +14,8 @@ module envoy {
 	requires transitive java.logging;
 	requires transitive java.naming;
 	requires transitive java.prefs;
+	requires javafx.controls;
+	requires javafx.fxml;
+
+	opens envoy.client.ui to javafx.graphics, javafx.fxml;
 }