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

@@ -135,7 +135,7 @@ public class Chat implements Serializable {
 	 *
 	 * @since Envoy Client v0.1-beta
 	 */
-	public void incrementUnreadAmount() { unreadAmount++; }
+	public void incrementUnreadAmount() { ++unreadAmount; }
 
 	/**
 	 * @return the amount of unread messages in this chat

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

@@ -155,8 +155,9 @@ public final class LocalDB implements EventListener {
 		users.put(user.getName(), user);
 
 		// Synchronize user status data
-		for (final var contact : users.values())
-			if (contact instanceof User) getChat(contact.getID()).ifPresent(chat -> { ((User) chat.getRecipient()).setStatus(contact.getStatus()); });
+		for (final var contact : user.getContacts())
+			if (contact instanceof User)
+				getChat(contact.getID()).ifPresent(chat -> { ((User) chat.getRecipient()).setStatus(((User) contact).getStatus()); });
 
 		// Create missing chats
 		user.getContacts()

client/src/main/java/envoy/client/ui/control/QuickSelectControl.java

@@ -0,0 +1,92 @@
+package envoy.client.ui.control;
+
+import java.util.function.Consumer;
+
+import javafx.geometry.*;
+import javafx.scene.control.*;
+import javafx.scene.image.ImageView;
+import javafx.scene.layout.*;
+import javafx.scene.shape.Rectangle;
+
+import envoy.client.util.IconUtil;
+import envoy.data.*;
+
+/**
+ * Displays an {@link User} as a quick select control which is used in the
+ * quick select list.
+ * 
+ * @author Maximilian Käfer
+ * @since Envoy Client v0.3-beta
+ */
+public class QuickSelectControl extends VBox {
+
+	private User user;
+
+	/**
+	 * Creates an instance of the {@code QuickSelectControl}.
+	 * 
+	 * @param user the contact whose data is used to create this instance.
+	 * @param action the action to perform when a contact is removed with this control as a parameter
+	 * @since Envoy Client v0.3-beta
+	 */
+	public QuickSelectControl(User user, Consumer<QuickSelectControl> action) {
+		this.user = user;
+		setPadding(new Insets(1, 0, 0, 0));
+		setPrefWidth(37);
+		setMaxWidth(37);
+		setMinWidth(37);
+		var stackPane = new StackPane();
+		stackPane.setAlignment(Pos.TOP_CENTER);
+
+		// Profile picture
+		var picHold = new VBox();
+		picHold.setPadding(new Insets(2, 0, 0, 0));
+		picHold.setPrefHeight(35);
+		picHold.setMaxHeight(35);
+		picHold.setMinHeight(35);
+		var			contactProfilePic	= new ImageView(IconUtil.loadIconThemeSensitive("user_icon", 32));
+		final var	clip				= new Rectangle();
+		clip.setWidth(32);
+		clip.setHeight(32);
+		clip.setArcHeight(32);
+		clip.setArcWidth(32);
+		contactProfilePic.setClip(clip);
+		picHold.getChildren().add(contactProfilePic);
+		stackPane.getChildren().add(picHold);
+
+		var hBox = new HBox();
+		hBox.setPrefHeight(12);
+		hBox.setMaxHeight(12);
+		hBox.setMinHeight(12);
+		var region = new Region();
+		hBox.getChildren().add(region);
+		HBox.setHgrow(region, Priority.ALWAYS);
+
+		var removeBtn = new Button();
+		removeBtn.setPrefSize(12, 12);
+		removeBtn.setMaxSize(12, 12);
+		removeBtn.setMinSize(12, 12);
+		removeBtn.setOnMouseClicked(evt -> action.accept(this));
+		removeBtn.setId("remove-button");
+		hBox.getChildren().add(removeBtn);
+		stackPane.getChildren().add(hBox);
+		getChildren().add(stackPane);
+
+		var nameLabel = new Label();
+		nameLabel.setPrefSize(35, 20);
+		nameLabel.setMaxSize(35, 20);
+		nameLabel.setMinSize(35, 20);
+		nameLabel.setText(user.getName());
+		nameLabel.setAlignment(Pos.TOP_CENTER);
+		nameLabel.setPadding(new Insets(0, 5, 0, 0));
+		getChildren().add(nameLabel);
+
+		getStyleClass().add("quick-select");
+	}
+
+	/**
+	 * @return the user whose data is used in this instance
+	 * @since Envoy Client v0.3-beta
+	 */
+	public User getUser() { return user; }
+}

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

@@ -223,16 +223,16 @@ public final class ChatScene implements EventListener, Restorable {
 		final var	recipientID	= message instanceof GroupMessage || ownMessage ? message.getRecipientID() : message.getSenderID();
 
 		localDB.getChat(recipientID).ifPresent(chat -> {
+			Platform.runLater(() -> {
 				chat.insert(message);
 
 				// Read current chat or increment unread amount
 				if (chat.equals(currentChat)) {
 					currentChat.read(writeProxy);
-				Platform.runLater(this::scrollToMessageListEnd);
+					scrollToMessageListEnd();
 				} else if (!ownMessage && message.getStatus() != MessageStatus.READ) chat.incrementUnreadAmount();
 
 				// Move chat with most recent unread messages to the top
-			Platform.runLater(() -> {
 				chats.getSource().remove(chat);
 				((ObservableList<Chat>) chats.getSource()).add(0, chat);
 

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

@@ -7,11 +7,12 @@ import java.util.stream.Collectors;
 import javafx.application.Platform;
 import javafx.fxml.FXML;
 import javafx.scene.control.*;
+import javafx.scene.input.MouseEvent;
 import javafx.scene.layout.HBox;
 
 import envoy.client.data.*;
 import envoy.client.event.BackEvent;
-import envoy.client.ui.control.ContactControl;
+import envoy.client.ui.control.*;
 import envoy.client.ui.listcell.ListCellFactory;
 import envoy.data.*;
 import envoy.event.GroupCreation;
@@ -58,6 +59,9 @@ public class GroupCreationTab implements EventListener {
 	@FXML
 	private HBox errorProceedBox;
 
+	@FXML
+	private ListView<QuickSelectControl> quickSelectList;
+
 	private String name;
 
 	private final LocalDB localDB = Context.getInstance().getLocalDB();
@@ -67,7 +71,6 @@ public class GroupCreationTab implements EventListener {
 	@FXML
 	private void initialize() {
 		userList.setCellFactory(new ListCellFactory<>(ContactControl::new));
-		userList.getSelectionModel().setSelectionMode(SelectionMode.MULTIPLE);
 		createButton.setDisable(true);
 		eventBus.registerListener(this);
 		userList.getItems()
@@ -78,6 +81,8 @@ public class GroupCreationTab implements EventListener {
 				.filter(not(localDB.getUser()::equals))
 				.map(User.class::cast)
 				.collect(Collectors.toList()));
+		resizeQuickSelectSpace(0);
+		quickSelectList.addEventFilter(MouseEvent.MOUSE_PRESSED, evt -> evt.consume());
 	}
 
 	/**
@@ -86,7 +91,15 @@ public class GroupCreationTab implements EventListener {
 	 * @since Envoy Client v0.1-beta
 	 */
 	@FXML
-	private void userListClicked() { createButton.setDisable(userList.getSelectionModel().isEmpty() || groupNameField.getText().isBlank()); }
+	private void userListClicked() {
+		if (userList.getSelectionModel().getSelectedItem() != null) {
+			quickSelectList.getItems().add(new QuickSelectControl(userList.getSelectionModel().getSelectedItem(), this::removeFromQuickSelection));
+			createButton.setDisable(quickSelectList.getItems().isEmpty() || groupNameField.getText().isBlank());
+			resizeQuickSelectSpace(60);
+			userList.getItems().remove(userList.getSelectionModel().getSelectedItem());
+			userList.getSelectionModel().clearSelection();
+		}
+	}
 
 	/**
 	 * Checks, whether the {@code createButton} can be enabled because text is
@@ -95,7 +108,7 @@ public class GroupCreationTab implements EventListener {
 	 * @since Envoy Client v0.1-beta
 	 */
 	@FXML
-	private void textUpdated() { createButton.setDisable(userList.getSelectionModel().isEmpty() || groupNameField.getText().isBlank()); }
+	private void textUpdated() { createButton.setDisable(quickSelectList.getItems().isEmpty() || groupNameField.getText().isBlank()); }
 
 	/**
 	 * Sends a {@link GroupCreation} to the server and closes this scene.
@@ -123,6 +136,9 @@ public class GroupCreationTab implements EventListener {
 			// Restoring the original design as tabs will always be reused
 			setErrorMessageLabelSize(0);
 			groupNameField.clear();
+			quickSelectList.getItems().forEach(q -> userList.getItems().add(q.getUser()));
+			quickSelectList.getItems().clear();
+			resizeQuickSelectSpace(0);
 		}
 	}
 
@@ -136,7 +152,7 @@ public class GroupCreationTab implements EventListener {
 	private void createGroup(String name) {
 		Context.getInstance()
 			.getClient()
-			.send(new GroupCreation(name, userList.getSelectionModel().getSelectedItems().stream().map(User::getID).collect(Collectors.toSet())));
+			.send(new GroupCreation(name, quickSelectList.getItems().stream().map(q -> q.getUser().getID()).collect(Collectors.toSet())));
 	}
 
 	/**
@@ -151,6 +167,27 @@ public class GroupCreationTab implements EventListener {
 		return localDB.getChats().stream().map(Chat::getRecipient).filter(Group.class::isInstance).map(Contact::getName).anyMatch(newName::equals);
 	}
 
+	/**
+	 * Removes an element from the quickSelectList.
+	 * 
+	 * @param element the element to be removed.
+	 * @since Envoy Client v0.3-beta
+	 */
+	public void removeFromQuickSelection(QuickSelectControl element) {
+		quickSelectList.getItems().remove(element);
+		userList.getItems().add(element.getUser());
+		if (quickSelectList.getItems().isEmpty()) {
+			resizeQuickSelectSpace(0);
+			createButton.setDisable(true);
+		}
+	}
+
+	private void resizeQuickSelectSpace(int value) {
+		quickSelectList.setPrefHeight(value);
+		quickSelectList.setMaxHeight(value);
+		quickSelectList.setMinHeight(value);
+	}
+
 	@FXML
 	private void backButtonClicked() {
 		eventBus.dispatch(new BackEvent());

client/src/main/resources/css/base.css

@@ -41,7 +41,7 @@
 	-fx-scale-y: 1.05;
 }
 
-.label {
+.label, .quick-select {
 	-fx-background-color: transparent;
 }
 
@@ -144,3 +144,15 @@
     visibility: hidden ;
     -fx-padding: -20.0 0.0 0.0 0.0;
 }
+
+#quick-select-list .scroll-bar:horizontal{
+	-fx-pref-height: 0;
+	-fx-max-height: 0;
+	-fx-min-height: 0; 
+}
+
+#quick-select-list .scroll-bar:vertical{
+	-fx-pref-width: 0;
+	-fx-max-width: 0;
+	-fx-min-width: 0; 
+}

client/src/main/resources/css/dark.css

@@ -18,7 +18,7 @@
 	-fx-background-color: lightgray;
 }
 
-#message-list, .text-field, .password-field, .tooltip, .pane, .pane .content, .vbox, .titled-pane > .title, .titled-pane > *.content, .context-menu, .menu-item {
+#message-list, .text-field, .password-field, .tooltip, .pane, .pane .content, .vbox, .titled-pane > .title, .titled-pane > *.content, .context-menu, .menu-item, #quick-select-list {
 	-fx-background-color: #222222;
 }
 
@@ -69,7 +69,7 @@
 	-fx-background-color: transparent;
 }
 
-.scroll-bar:vertical .increment-arrow, .scroll-bar:vertical .decrement-arrow {
+.scroll-bar:vertical .increment-arrow, .scroll-bar:vertical .decrement-arrow, .list-cell {
 	-fx-background-color: transparent;
 }
 
@@ -83,3 +83,8 @@
 	-fx-text-fill: white;
 	-fx-background-color: transparent;
 }
+
+#remove-button {
+	-fx-background-color: red;
+	-fx-background-radius: 1em;
+}

client/src/main/resources/fxml/ChatScene.fxml

@@ -20,13 +20,17 @@
 <?import javafx.scene.layout.RowConstraints?>
 <?import javafx.scene.layout.VBox?>
 <?import javafx.scene.text.Font?>
+<?import javafx.stage.Screen?>
 
 <GridPane fx:id="scene" maxHeight="-Infinity"
 	maxWidth="-Infinity" minHeight="400.0" minWidth="500.0"
-	prefHeight="1152.0" prefWidth="2042.0"
+	prefHeight="${screen.visualBounds.height}" prefWidth="${screen.visualBounds.width}"
 	xmlns="http://javafx.com/javafx/11.0.1"
 	xmlns:fx="http://javafx.com/fxml/1"
 	fx:controller="envoy.client.ui.controller.ChatScene">
+	<fx:define>
+    	<Screen fx:factory="getPrimary" fx:id="screen" />
+	</fx:define>
 	<columnConstraints>
 		<ColumnConstraints hgrow="NEVER"
 			maxWidth="327.99997965494794" minWidth="-Infinity" prefWidth="317.0" />

client/src/main/resources/fxml/GroupCreationTab.fxml

@@ -64,6 +64,7 @@
                <Insets bottom="5.0" top="5" />
             </VBox.margin>
          </Label>
+         <ListView fx:id="quickSelectList" id="quick-select-list" orientation="HORIZONTAL" prefHeight="60.0" />
          <ListView id="chat-list" fx:id="userList" focusTraversable="false" onMouseClicked="#userListClicked" prefWidth="316.0" VBox.vgrow="ALWAYS">
             <contextMenu>
                <ContextMenu anchorLocation="CONTENT_TOP_LEFT" />