Merge pull request #135 from informatik-ag-ngl/f/themes

Added CSS-based Theming Support + Basic ChatWindow Layout

.settings/org.eclipse.jdt.core.prefs

@@ -128,3 +128,364 @@ org.eclipse.jdt.core.compiler.problem.unusedWarningToken=warning
 org.eclipse.jdt.core.compiler.problem.varargsArgumentNeedCast=warning
 org.eclipse.jdt.core.compiler.release=disabled
 org.eclipse.jdt.core.compiler.source=11
+org.eclipse.jdt.core.formatter.align_assignment_statements_on_columns=true
+org.eclipse.jdt.core.formatter.align_fields_grouping_blank_lines=1
+org.eclipse.jdt.core.formatter.align_type_members_on_columns=true
+org.eclipse.jdt.core.formatter.align_variable_declarations_on_columns=true
+org.eclipse.jdt.core.formatter.align_with_spaces=false
+org.eclipse.jdt.core.formatter.alignment_for_additive_operator=16
+org.eclipse.jdt.core.formatter.alignment_for_arguments_in_allocation_expression=16
+org.eclipse.jdt.core.formatter.alignment_for_arguments_in_annotation=84
+org.eclipse.jdt.core.formatter.alignment_for_arguments_in_enum_constant=16
+org.eclipse.jdt.core.formatter.alignment_for_arguments_in_explicit_constructor_call=16
+org.eclipse.jdt.core.formatter.alignment_for_arguments_in_method_invocation=80
+org.eclipse.jdt.core.formatter.alignment_for_arguments_in_qualified_allocation_expression=20
+org.eclipse.jdt.core.formatter.alignment_for_assignment=0
+org.eclipse.jdt.core.formatter.alignment_for_bitwise_operator=16
+org.eclipse.jdt.core.formatter.alignment_for_compact_if=16
+org.eclipse.jdt.core.formatter.alignment_for_compact_loops=16
+org.eclipse.jdt.core.formatter.alignment_for_conditional_expression=80
+org.eclipse.jdt.core.formatter.alignment_for_conditional_expression_chain=0
+org.eclipse.jdt.core.formatter.alignment_for_enum_constants=16
+org.eclipse.jdt.core.formatter.alignment_for_expressions_in_array_initializer=16
+org.eclipse.jdt.core.formatter.alignment_for_expressions_in_for_loop_header=0
+org.eclipse.jdt.core.formatter.alignment_for_logical_operator=16
+org.eclipse.jdt.core.formatter.alignment_for_method_declaration=0
+org.eclipse.jdt.core.formatter.alignment_for_module_statements=16
+org.eclipse.jdt.core.formatter.alignment_for_multiple_fields=16
+org.eclipse.jdt.core.formatter.alignment_for_multiplicative_operator=16
+org.eclipse.jdt.core.formatter.alignment_for_parameterized_type_references=0
+org.eclipse.jdt.core.formatter.alignment_for_parameters_in_constructor_declaration=16
+org.eclipse.jdt.core.formatter.alignment_for_parameters_in_method_declaration=16
+org.eclipse.jdt.core.formatter.alignment_for_relational_operator=0
+org.eclipse.jdt.core.formatter.alignment_for_resources_in_try=80
+org.eclipse.jdt.core.formatter.alignment_for_selector_in_method_invocation=84
+org.eclipse.jdt.core.formatter.alignment_for_shift_operator=0
+org.eclipse.jdt.core.formatter.alignment_for_string_concatenation=16
+org.eclipse.jdt.core.formatter.alignment_for_superclass_in_type_declaration=16
+org.eclipse.jdt.core.formatter.alignment_for_superinterfaces_in_enum_declaration=16
+org.eclipse.jdt.core.formatter.alignment_for_superinterfaces_in_type_declaration=16
+org.eclipse.jdt.core.formatter.alignment_for_throws_clause_in_constructor_declaration=16
+org.eclipse.jdt.core.formatter.alignment_for_throws_clause_in_method_declaration=16
+org.eclipse.jdt.core.formatter.alignment_for_type_arguments=0
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+org.eclipse.jdt.core.formatter.blank_lines_after_imports=1
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+org.eclipse.jdt.core.formatter.blank_lines_before_abstract_method=1
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+org.eclipse.jdt.core.formatter.blank_lines_between_import_groups=1
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+org.eclipse.jdt.core.formatter.brace_position_for_lambda_body=end_of_line
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+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_catch=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_constructor_declaration=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_enum_constant=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_for=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_if=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_method_declaration=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_method_invocation=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_parenthesized_expression=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_switch=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_synchronized=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_try=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_while=insert
+org.eclipse.jdt.core.formatter.insert_space_before_parenthesized_expression_in_return=insert
+org.eclipse.jdt.core.formatter.insert_space_before_parenthesized_expression_in_throw=insert
+org.eclipse.jdt.core.formatter.insert_space_before_postfix_operator=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_prefix_operator=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_question_in_conditional=insert
+org.eclipse.jdt.core.formatter.insert_space_before_question_in_wildcard=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_relational_operator=insert
+org.eclipse.jdt.core.formatter.insert_space_before_semicolon=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_semicolon_in_for=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_semicolon_in_try_resources=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_shift_operator=insert
+org.eclipse.jdt.core.formatter.insert_space_before_string_concatenation=insert
+org.eclipse.jdt.core.formatter.insert_space_before_unary_operator=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_brackets_in_array_type_reference=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_empty_braces_in_array_initializer=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_empty_brackets_in_array_allocation_expression=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_annotation_type_member_declaration=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_constructor_declaration=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_enum_constant=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_method_declaration=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_method_invocation=do not insert
+org.eclipse.jdt.core.formatter.join_lines_in_comments=false
+org.eclipse.jdt.core.formatter.join_wrapped_lines=true
+org.eclipse.jdt.core.formatter.keep_annotation_declaration_on_one_line=one_line_if_single_item
+org.eclipse.jdt.core.formatter.keep_anonymous_type_declaration_on_one_line=one_line_never
+org.eclipse.jdt.core.formatter.keep_code_block_on_one_line=one_line_if_empty
+org.eclipse.jdt.core.formatter.keep_else_statement_on_same_line=true
+org.eclipse.jdt.core.formatter.keep_empty_array_initializer_on_one_line=false
+org.eclipse.jdt.core.formatter.keep_enum_constant_declaration_on_one_line=one_line_never
+org.eclipse.jdt.core.formatter.keep_enum_declaration_on_one_line=one_line_never
+org.eclipse.jdt.core.formatter.keep_if_then_body_block_on_one_line=one_line_if_single_item
+org.eclipse.jdt.core.formatter.keep_imple_if_on_one_line=false
+org.eclipse.jdt.core.formatter.keep_lambda_body_block_on_one_line=one_line_always
+org.eclipse.jdt.core.formatter.keep_loop_body_block_on_one_line=one_line_if_empty
+org.eclipse.jdt.core.formatter.keep_method_body_on_one_line=one_line_if_single_item
+org.eclipse.jdt.core.formatter.keep_simple_do_while_body_on_same_line=false
+org.eclipse.jdt.core.formatter.keep_simple_for_body_on_same_line=false
+org.eclipse.jdt.core.formatter.keep_simple_getter_setter_on_one_line=true
+org.eclipse.jdt.core.formatter.keep_simple_while_body_on_same_line=false
+org.eclipse.jdt.core.formatter.keep_then_statement_on_same_line=true
+org.eclipse.jdt.core.formatter.keep_type_declaration_on_one_line=one_line_never
+org.eclipse.jdt.core.formatter.lineSplit=150
+org.eclipse.jdt.core.formatter.never_indent_block_comments_on_first_column=false
+org.eclipse.jdt.core.formatter.never_indent_line_comments_on_first_column=false
+org.eclipse.jdt.core.formatter.number_of_blank_lines_after_code_block=0
+org.eclipse.jdt.core.formatter.number_of_blank_lines_at_beginning_of_code_block=0
+org.eclipse.jdt.core.formatter.number_of_blank_lines_at_beginning_of_method_body=0
+org.eclipse.jdt.core.formatter.number_of_blank_lines_at_end_of_code_block=0
+org.eclipse.jdt.core.formatter.number_of_blank_lines_at_end_of_method_body=0
+org.eclipse.jdt.core.formatter.number_of_blank_lines_before_code_block=0
+org.eclipse.jdt.core.formatter.number_of_empty_lines_to_preserve=1
+org.eclipse.jdt.core.formatter.parentheses_positions_in_annotation=separate_lines_if_wrapped
+org.eclipse.jdt.core.formatter.parentheses_positions_in_catch_clause=common_lines
+org.eclipse.jdt.core.formatter.parentheses_positions_in_enum_constant_declaration=common_lines
+org.eclipse.jdt.core.formatter.parentheses_positions_in_for_statment=common_lines
+org.eclipse.jdt.core.formatter.parentheses_positions_in_if_while_statement=common_lines
+org.eclipse.jdt.core.formatter.parentheses_positions_in_lambda_declaration=common_lines
+org.eclipse.jdt.core.formatter.parentheses_positions_in_method_delcaration=common_lines
+org.eclipse.jdt.core.formatter.parentheses_positions_in_method_invocation=common_lines
+org.eclipse.jdt.core.formatter.parentheses_positions_in_switch_statement=common_lines
+org.eclipse.jdt.core.formatter.parentheses_positions_in_try_clause=common_lines
+org.eclipse.jdt.core.formatter.put_empty_statement_on_new_line=true
+org.eclipse.jdt.core.formatter.tabulation.char=tab
+org.eclipse.jdt.core.formatter.tabulation.size=4
+org.eclipse.jdt.core.formatter.text_block_indentation=0
+org.eclipse.jdt.core.formatter.use_on_off_tags=false
+org.eclipse.jdt.core.formatter.use_tabs_only_for_leading_indentations=false
+org.eclipse.jdt.core.formatter.wrap_before_additive_operator=true
+org.eclipse.jdt.core.formatter.wrap_before_assignment_operator=false
+org.eclipse.jdt.core.formatter.wrap_before_bitwise_operator=true
+org.eclipse.jdt.core.formatter.wrap_before_conditional_operator=true
+org.eclipse.jdt.core.formatter.wrap_before_logical_operator=true
+org.eclipse.jdt.core.formatter.wrap_before_multiplicative_operator=true
+org.eclipse.jdt.core.formatter.wrap_before_or_operator_multicatch=true
+org.eclipse.jdt.core.formatter.wrap_before_relational_operator=true
+org.eclipse.jdt.core.formatter.wrap_before_shift_operator=true
+org.eclipse.jdt.core.formatter.wrap_before_string_concatenation=true
+org.eclipse.jdt.core.formatter.wrap_outer_expressions_when_nested=true
+org.eclipse.jdt.core.javaFormatter=org.eclipse.jdt.core.defaultJavaFormatter

.settings/org.eclipse.jdt.ui.prefs

@@ -1,4 +1,6 @@
 eclipse.preferences.version=1
+formatter_profile=_KSKE
+formatter_settings_version=18
 org.eclipse.jdt.ui.ignorelowercasenames=true
 org.eclipse.jdt.ui.importorder=java;javax;javafx;org;com;envoy;
 org.eclipse.jdt.ui.javadoc=true

src/main/java/envoy/client/DeveloperComments.java

@@ -1,17 +0,0 @@
-package envoy.client;
-
-/**
- * Project: <strong>envoy-client</strong><br>
- * File: <strong>DeveloperComments.java</strong><br>
- * Created: <strong>19 Apr 2020</strong><br>
- * 
- * @author Leon Hofmeister
- * @since Envoy Client v0.1-beta
- */
-public class DeveloperComments {
-
-	// "Schau, es hat sich behindert" - Kai, 2020
-
-	// LEON: JFC <===> JAVA FRIED CHICKEN <=/=> Java Foundation Classes
-	
-}

src/main/java/envoy/client/data/Settings.java

@@ -46,8 +46,8 @@ public class Settings {
 	private static Settings settings = new Settings();
 
 	/**
-	 * The way to instantiate the settings.
+	 * The way to instantiate the settings. Is set to private to deny other
-	 * Is set to private to deny other instances of that object.
+	 * instances of that object.
 	 *
 	 * @since Envoy Client v0.2-alpha
 	 */
@@ -134,6 +134,13 @@ public class Settings {
 	 */
 	public void setCurrentTheme(String themeName) { ((SettingsItem<String>) items.get("currentTheme")).set(themeName); }
 
+	/**
+	 * @return whether the current {@link Theme} is one of the default themes.
+	 *         Currently checks for dark and light theme.
+	 * @since Envoy Client v0.1-beta
+	 */
+	public boolean isUsingDefaultTheme() { return getCurrentThemeName().equals("dark") || getCurrentThemeName().equals("light"); }
+
 	/**
 	 * @return {@code true}, if pressing the {@code Enter} key suffices to send a
 	 *         message. Otherwise it has to be pressed in conjunction with the

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

@@ -1,12 +1,10 @@
 package envoy.client.ui;
 
-import java.awt.Image;
 import java.io.IOException;
 import java.util.EnumMap;
 import java.util.EnumSet;
 
-import javax.imageio.ImageIO;
+import javafx.scene.image.Image;
-import javax.swing.ImageIcon;
 
 /**
  * Provides static utility methods for loading icons from the resource
@@ -24,7 +22,17 @@ public class IconUtil {
 	private IconUtil() {}
 
 	/**
-	 * Loads an icon from resource folder and scales it to a given size.
+	 * Loads an icon from the resource folder.
+	 * 
+	 * @param path the path to the icon inside the resource folder
+	 * @return the icon
+	 * @throws IOException if the loading process failed
+	 * @since Envoy Client v0.1-beta
+	 */
+	public static Image load(String path) throws IOException { return new Image(IconUtil.class.getResource(path).toExternalForm()); }
+
+	/**
+	 * Loads an icon from the resource folder and scales it to a given size.
 	 * 
 	 * @param path the path to the icon inside the resource folder
 	 * @param size the size to scale the icon to
@@ -32,8 +40,8 @@ public class IconUtil {
 	 * @throws IOException if the loading process failed
 	 * @since Envoy Client v0.1-beta
 	 */
-	public static ImageIcon load(String path, int size) throws IOException {
+	public static Image load(String path, int size) throws IOException {
-		return new ImageIcon(ImageIO.read(IconUtil.class.getResourceAsStream(path)).getScaledInstance(size, size, Image.SCALE_SMOOTH));
+		return new Image(IconUtil.class.getResource(path).toExternalForm(), size, size, true, true);
 	}
 
 	/**
@@ -51,8 +59,8 @@ public class IconUtil {
 	 * @throws IOException if the loading process failed
 	 * @since Envoy Client v0.1-beta
 	 */
-	public static <T extends Enum<T>> EnumMap<T, ImageIcon> loadByEnum(Class<T> enumClass, int size) throws IOException {
+	public static <T extends Enum<T>> EnumMap<T, Image> loadByEnum(Class<T> enumClass, int size) throws IOException {
-		var	icons	= new EnumMap<T, ImageIcon>(enumClass);
+		var	icons	= new EnumMap<T, Image>(enumClass);
 		var	path	= "/icons/" + enumClass.getSimpleName().toLowerCase() + "/";
 		for (var e : EnumSet.allOf(enumClass))
 			icons.put(e, load(path + e.toString().toLowerCase() + ".png", size));

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

@@ -10,6 +10,7 @@ import javafx.fxml.FXML;
 import javafx.fxml.FXMLLoader;
 import javafx.scene.control.*;
 import javafx.scene.control.Alert.AlertType;
+import javafx.stage.Stage;
 
 import envoy.client.data.Cache;
 import envoy.client.data.ClientConfig;
@@ -61,8 +62,8 @@ public final class LoginDialog extends Dialog<Void> {
 	 * 
 	 * @param client               the client used to perform the handshake
 	 * @param localDB              the local database used for offline login
-	 * @param receivedMessageCache the cache storing messages received during the
+	 * @param receivedMessageCache the cache storing messages received during
-	 *                             handshake
+	 *                             the handshake
 	 * @throws IOException if an exception occurs during loading
 	 * @since Envoy Client v0.1-beta
 	 */
@@ -75,6 +76,8 @@ public final class LoginDialog extends Dialog<Void> {
 		loader.setController(this);
 		final var dialogPane = loader.<DialogPane>load();
 
+		((Stage) getDialogPane().getScene().getWindow()).getIcons().add(IconUtil.load("/icons/envoy_logo.png"));
+		
 		// Configure dialog buttons
 		dialogPane.getButtonTypes().addAll(ButtonType.CLOSE, ButtonType.OK);
 
@@ -99,6 +102,9 @@ public final class LoginDialog extends Dialog<Void> {
 		setOnShown(e -> { if (config.hasLoginCredentials()) performHandshake(config.getLoginCredentials()); });
 
 		setDialogPane(dialogPane);
+
+		// Set initial cursor
+		Platform.runLater(userTextField::requestFocus);
 	}
 
 	@FXML
@@ -107,9 +113,6 @@ public final class LoginDialog extends Dialog<Void> {
 		// Show an alert after an unsuccessful handshake
 		eventBus.register(HandshakeRejectionEvent.class,
 				e -> Platform.runLater(() -> { clearPasswordFields(); new Alert(AlertType.ERROR, e.get()).showAndWait(); }));
-
-		// Set initial cursor
-		userTextField.requestFocus();
 	}
 
 	@FXML
@@ -144,7 +147,8 @@ public final class LoginDialog extends Dialog<Void> {
 				if (clientUser == null) throw new EnvoyException("Could not enter offline mode: user name unknown");
 				client.setSender(clientUser);
 				Platform.runLater(() -> {
-					new Alert(AlertType.WARNING, "A connection to the server could not be established. Starting in offline mode.\n" + e)
+					new Alert(AlertType.WARNING, "A connection to the server could not be established. Starting in offline mode.\n"
+							+ e)
 						.showAndWait();
 					hide();
 				});

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

@@ -13,17 +13,18 @@ import javafx.fxml.FXMLLoader;
 import javafx.scene.Scene;
 import javafx.scene.control.Alert;
 import javafx.scene.control.Alert.AlertType;
-import javafx.scene.image.Image;
 import javafx.scene.layout.GridPane;
 import javafx.scene.layout.Pane;
 import javafx.stage.Stage;
 
 import envoy.client.data.*;
+import envoy.client.event.ThemeChangeEvent;
 import envoy.client.net.Client;
 import envoy.client.net.WriteProxy;
 import envoy.data.Message;
 import envoy.data.User;
 import envoy.data.User.UserStatus;
+import envoy.event.EventBus;
 import envoy.exception.EnvoyException;
 import envoy.util.EnvoyLog;
 
@@ -44,9 +45,9 @@ public final class Startup extends Application {
 
 	private FXMLLoader	loader	= new FXMLLoader();
 	private Stage		stage;
-
 	private Scene		previousScene;
 
+	private static final Settings		settings	= Settings.getInstance();
 	private static final ClientConfig	config		= ClientConfig.getInstance();
 	private static final Logger			logger		= EnvoyLog.getLogger(Startup.class);
 
@@ -58,17 +59,17 @@ public final class Startup extends Application {
 		this.stage = stage;
 		try {
 			// Load the configuration from client.properties first
-			Properties properties = new Properties();
+			final Properties properties = new Properties();
 			properties.load(Startup.class.getClassLoader().getResourceAsStream("client.properties"));
 			config.load(properties);
 
 			// Override configuration values with command line arguments
-			String[] args = getParameters().getRaw().toArray(new String[0]);
+			final String[] args = getParameters().getRaw().toArray(new String[0]);
 			if (args.length > 0) config.load(args);
 
 			// Check if all mandatory configuration values have been initialized
 			if (!config.isInitialized()) throw new EnvoyException("Configuration is not fully initialized");
-		} catch (Exception e) {
+		} catch (final Exception e) {
 			new Alert(AlertType.ERROR, "Error loading configuration values:\n" + e);
 			e.printStackTrace();
 			System.exit(1);
@@ -86,7 +87,7 @@ public final class Startup extends Application {
 			new Alert(AlertType.WARNING, "Ignoring local database.\nMessages will not be saved!").showAndWait();
 		} else try {
 			localDB = new PersistentLocalDB(new File(config.getHomeDirectory(), config.getLocalDB().getPath()));
-		} catch (IOException e3) {
+		} catch (final IOException e3) {
 			logger.log(Level.SEVERE, "Could not initialize local database", e3);
 			new Alert(AlertType.ERROR, "Could not initialize local database!\n" + e3).showAndWait();
 			System.exit(1);
@@ -107,9 +108,9 @@ public final class Startup extends Application {
 		try {
 			localDB.initializeUserStorage();
 			localDB.loadUserData();
-		} catch (FileNotFoundException e) {
+		} catch (final FileNotFoundException e) {
 			// The local database file has not yet been created, probably first login
-		} catch (Exception e) {
+		} catch (final Exception e) {
 			e.printStackTrace();
 			new Alert(AlertType.ERROR, "Error while loading local database: " + e + "\nChats will not be stored locally.").showAndWait();
 		}
@@ -135,9 +136,11 @@ public final class Startup extends Application {
 		changeScene("/fxml/ChatScene.fxml", new GridPane(), false);
 		Platform.runLater(() -> { ((ChatSceneController) loader.getController()).initializeData(this, localDB, client, writeProxy); });
 		stage.setTitle("Envoy");
-		stage.getIcons().add(new Image(getClass().getResourceAsStream("/icons/envoy_logo.png")));
+		stage.getIcons().add(IconUtil.load("/icons/envoy_logo.png"));
-
 		stage.show();
+		// TODO: Add capability to change custom CSS. In case of switching to a default
+		// theme, no further action is required
+		EventBus.getInstance().register(ThemeChangeEvent.class, theme -> applyCSS());
 
 		// Relay unread messages from cache
 		if (cache != null && client.isOnline()) cache.relay();
@@ -159,14 +162,16 @@ public final class Startup extends Application {
 			try {
 				// Clearing the loader so that a new Scene can be initialised
 				loader = new FXMLLoader();
-				var	rootNode	= loader.<T>load(getClass().getResourceAsStream(fxmlLocation));
+				final var	rootNode	= loader.<T>load(getClass().getResourceAsStream(fxmlLocation));
-				var	chatScene	= new Scene(rootNode);
+				final var	scene		= new Scene(rootNode);
-				previousScene = (savePrevious) ? stage.getScene() : null;
+				previousScene = savePrevious ? stage.getScene() : null;
-				stage.setScene(chatScene);
+				// Setting the visual appearance
+				stage.setScene(scene);
+				applyCSS();
 				stage.show();
-				// return loader.getController();
+			} catch (final IOException e) {
-			} catch (IOException e) {
 				new Alert(AlertType.ERROR, "The screen could not be updated due to reasons. (...bad programming...)");
+				System.err.println("input: FXMLLocation: " + fxmlLocation);
 				e.printStackTrace();
 				logger.severe("Something happened (while loading the new scene from " + fxmlLocation + ")");
 			}
@@ -175,7 +180,7 @@ public final class Startup extends Application {
 
 	/**
 	 * Changes the visual scene back to the saved value. The currently active scene
-	 * can be saved.
+	 * can be saved, but must not be.
 	 *
 	 * @param storeCurrent the old scene to store, if wanted. Can be null
 	 * @since Envoy Client v0.1-beta
@@ -185,8 +190,9 @@ public final class Startup extends Application {
 			if (previousScene == null) throw new IllegalStateException("Someone tried restoring a null scene. (Something happened)");
 			else {
 				// switching previous and current
-				var temp = (storeCurrent) ? stage.getScene() : null;
+				final var temp = storeCurrent ? stage.getScene() : null;
 				stage.setScene(previousScene);
+				applyCSS();
 				previousScene = temp;
 				stage.show();
 			}
@@ -199,7 +205,6 @@ public final class Startup extends Application {
 	@Override
 	public void stop() throws Exception {
 		try {
-
 			// Save Settings and PersistentLocalDB on shutdown
 			logger.info("Closing connection...");
 			client.close();
@@ -207,14 +212,11 @@ public final class Startup extends Application {
 			logger.info("Saving local database and settings...");
 			localDB.save();
 			Settings.getInstance().save();
-		} catch (Exception e) {
+		} catch (final Exception e) {
 			logger.log(Level.SEVERE, "Unable to save local files", e);
 		}
 	}
 
-	@SuppressWarnings("javadoc")
-	public static void main(String[] args) { launch(args); }
-
 	/**
 	 * @return the controller of the current scene or a {@link NullPointerException}
 	 *         if there is none
@@ -224,4 +226,21 @@ public final class Startup extends Application {
 		if (loader.getController() == null) throw new NullPointerException("Cannot deliver current controller as its undefined (duh!)");
 		else return loader.getController();
 	}
+
+	/**
+	 * Sets the CSS files used for each scene. Should be called when the theme
+	 * changes.
+	 *
+	 * @since Envoy Client v0.1-beta
+	 */
+	public void applyCSS() {
+		final var styleSheets = stage.getScene().getStylesheets();
+		styleSheets.clear();
+		styleSheets.add(getClass().getResource("/css/base.css").toExternalForm());
+		styleSheets.add(getClass().getResource("/css/" + (settings.isUsingDefaultTheme() ? settings.getCurrentThemeName() : "custom") + ".css")
+			.toExternalForm());
+	}
+
+	@SuppressWarnings("javadoc")
+	public static void main(String[] args) { launch(args); }
 }

src/main/resources/client.properties

@@ -1,3 +1,3 @@
-server=http://kske.feste-ip.net
+server=localhost
-port=43315
+port=8080
 localDB=.\\localDB

src/main/resources/css/base.css

@@ -0,0 +1,4 @@
+* {
+	/* -fx-font: 14.0pt "Serif"; */
+    /* -fx-background-color:#000000; */
+}

src/main/resources/css/dark.css

@@ -0,0 +1,7 @@
+.root{
+	--background=#000000;
+	background: var(--background);
+}
+.button{
+	color: rgb(105,0,153);
+}

src/main/resources/fxml/ChatScene.fxml

@@ -8,41 +8,23 @@
 <?import javafx.scene.layout.GridPane?>
 <?import javafx.scene.layout.RowConstraints?>
 
-<GridPane id="recipientLabel" maxHeight="-Infinity"
+<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">
-	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"
+		<ColumnConstraints hgrow="SOMETIMES" maxWidth="161.0" minWidth="10.0" prefWidth="161.0" />
-			prefWidth="100.0" />
+		<ColumnConstraints hgrow="SOMETIMES" maxWidth="393.7142639160156" minWidth="10.0" prefWidth="357.0" />
-		<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0"
+      <ColumnConstraints hgrow="SOMETIMES" maxWidth="195.4285888671875" minWidth="6.285736083984375" prefWidth="48.000030517578125" />
-			prefWidth="100.0" />
 	</columnConstraints>
 	<rowConstraints>
-		<RowConstraints minHeight="10.0" prefHeight="30.0"
+		<RowConstraints maxHeight="60.57145036969865" minHeight="10.0" prefHeight="18.857155936104903" vgrow="SOMETIMES" />
-			vgrow="SOMETIMES" />
+		<RowConstraints maxHeight="326.2857404436384" minHeight="10.0" prefHeight="326.2857404436384" vgrow="SOMETIMES" />
-		<RowConstraints minHeight="10.0" prefHeight="30.0"
+		<RowConstraints maxHeight="153.28569902692522" minHeight="10.0" prefHeight="36.428545270647305" vgrow="SOMETIMES" />
-			vgrow="SOMETIMES" />
-		<RowConstraints minHeight="10.0" prefHeight="30.0"
-			vgrow="SOMETIMES" />
 	</rowConstraints>
 	<children>
-		<ListView fx:id="userList" prefHeight="211.0"
+		<ListView fx:id="userList" onMouseClicked="#userListClicked" prefHeight="211.0" prefWidth="300.0" GridPane.rowIndex="1" GridPane.rowSpan="2" />
-			prefWidth="300.0" GridPane.rowIndex="1"
+		<Label fx:id="contactLabel" text="Select a contact to chat with" />
-			onMouseClicked="#userListClicked" />
+		<Button fx:id="settingsButton" mnemonicParsing="false" onAction="#settingsButtonClicked" text="Settings" GridPane.columnIndex="2" />
-		<Label text="Select a contact to chat with" fx:id="contactLabel" />
+		<ListView fx:id="messageList" prefHeight="257.0" prefWidth="155.0" GridPane.columnIndex="1" GridPane.columnSpan="2" GridPane.rowIndex="1" />
-		<Button fx:id="settingsButton" mnemonicParsing="false"
+		<Button fx:id="postButton" disable="true" mnemonicParsing="false" onAction="#postButtonClicked" text="Post" GridPane.columnIndex="2" GridPane.rowIndex="2" />
-			text="Settings" GridPane.columnIndex="1"
+		<TextArea fx:id="messageTextArea" onKeyReleased="#messageTextUpdated" prefHeight="200.0" prefWidth="200.0" GridPane.columnIndex="1" GridPane.rowIndex="2" />
-			onAction="#settingsButtonClicked" />
-		<ListView fx:id="messageList" prefHeight="257.0"
-			prefWidth="300.0" GridPane.columnIndex="1" GridPane.rowIndex="1" />
-		<Button fx:id="postButton" mnemonicParsing="false" text="Post"
-			GridPane.columnIndex="1" GridPane.rowIndex="2"
-			onAction="#postButtonClicked" disable="true" />
-		<TextArea fx:id="messageTextArea" prefHeight="200.0"
-			prefWidth="200.0" GridPane.rowIndex="2"
-			onKeyReleased="#messageTextUpdated" />
 	</children>
 </GridPane>

src/main/resources/fxml/LoginDialog.fxml

@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
 
-<?import javafx.scene.control.Button?>
 <?import javafx.scene.control.CheckBox?>
 <?import javafx.scene.control.DialogPane?>
 <?import javafx.scene.control.Label?>
@@ -8,18 +7,13 @@
 <?import javafx.scene.control.TextField?>
 <?import javafx.scene.layout.ColumnConstraints?>
 <?import javafx.scene.layout.GridPane?>
-<?import javafx.scene.layout.HBox?>
 <?import javafx.scene.layout.RowConstraints?>
 <?import javafx.scene.layout.VBox?>
 <?import javafx.scene.text.Font?>
 
-<DialogPane prefHeight="201.0" prefWidth="525.0"
+<DialogPane prefHeight="201.0" prefWidth="525.0" xmlns="http://javafx.com/javafx/11.0.1" xmlns:fx="http://javafx.com/fxml/1">
-	xmlns="http://javafx.com/javafx/11.0.1"
-	xmlns:fx="http://javafx.com/fxml/1">
 	<content>
-		<VBox maxHeight="-Infinity" maxWidth="-Infinity"
+		<VBox maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="217.0" prefWidth="545.0">
-			minHeight="-Infinity" minWidth="-Infinity" prefHeight="217.0"
-			prefWidth="545.0">
 			<children>
 				<Label text="User Login">
 					<font>
@@ -28,34 +22,24 @@
 				</Label>
 				<GridPane>
 					<columnConstraints>
-						<ColumnConstraints hgrow="SOMETIMES"
+						<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" percentWidth="40.0" prefWidth="100.0" />
-							minWidth="10.0" percentWidth="40.0" prefWidth="100.0" />
+						<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"
+						<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
-							vgrow="SOMETIMES" />
+						<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
-						<RowConstraints minHeight="10.0" prefHeight="30.0"
+						<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
-							vgrow="SOMETIMES" />
-						<RowConstraints minHeight="10.0" prefHeight="30.0"
-							vgrow="SOMETIMES" />
 					</rowConstraints>
 					<children>
 						<Label text="User Name:" />
 						<Label text="Password" GridPane.rowIndex="1" />
-						<Label fx:id="repeatPasswordLabel" text="Repeat Password:"
+						<Label fx:id="repeatPasswordLabel" text="Repeat Password:" visible="false" GridPane.rowIndex="2" />
-							visible="false" GridPane.rowIndex="2" />
+						<TextField fx:id="userTextField" GridPane.columnIndex="1" />
-						<TextField fx:id="userTextField"
+						<PasswordField fx:id="passwordField" GridPane.columnIndex="1" GridPane.rowIndex="1" />
-							GridPane.columnIndex="1" />
+						<PasswordField fx:id="repeatPasswordField" visible="false" GridPane.columnIndex="1" GridPane.rowIndex="2" />
-						<PasswordField fx:id="passwordField"
-							GridPane.columnIndex="1" GridPane.rowIndex="1" />
-						<PasswordField fx:id="repeatPasswordField"
-							visible="false" GridPane.columnIndex="1" GridPane.rowIndex="2" />
 					</children>
 				</GridPane>
-				<CheckBox fx:id="registerCheckBox" mnemonicParsing="false"
+				<CheckBox fx:id="registerCheckBox" mnemonicParsing="false" onAction="#registerCheckboxChanged" prefHeight="17.0" prefWidth="181.0" text="Register" />
-					onAction="#registerCheckboxChanged" text="Register" />
 			</children>
 		</VBox>
 	</content>