Implemented notification of user if he can no longer send messages

This only occurs when he is in offline mode and runs out of messageIDs
to use.
Additionally implemented:
- automatically disabled user of posting after that condition is reached
- an infoLabel used to commjunicate some events with the user
- (in parts) a new UI design

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

@@ -16,6 +16,7 @@ import javafx.scene.image.ImageView;
 import javafx.scene.input.KeyCode;
 import javafx.scene.input.KeyEvent;
 import javafx.scene.paint.Color;
+import javafx.scene.paint.Paint;
 
 import envoy.client.data.Chat;
 import envoy.client.data.LocalDB;
@@ -62,6 +63,9 @@ public final class ChatScene {
 	@FXML
 	private Label remainingChars;
 
+	@FXML
+	private Label infoLabel;
+
 	@FXML
 	private MenuItem deleteContactMenuItem;
 
@@ -70,6 +74,8 @@ public final class ChatScene {
 	private WriteProxy		writeProxy;
 	private SceneContext	sceneContext;
 
+	private boolean postingPermanentlyDisabled = false;
+
 	private Chat currentChat;
 
 	private static final Settings	settings			= Settings.getInstance();
@@ -165,6 +171,7 @@ public final class ChatScene {
 		userList.setItems(FXCollections.observableList(localDB.getChats().stream().map(Chat::getRecipient).collect(Collectors.toList())));
 		contactLabel.setText(localDB.getUser().getName());
 		MessageListCell.setUser(localDB.getUser());
+		if (!client.isOnline()) updateInfoLabel("You are offline", Color.YELLOW);
 	}
 
 	/**
@@ -244,10 +251,15 @@ public final class ChatScene {
 	 */
 	@FXML
 	private void checkPostConditions(KeyEvent e) {
-		if (!postButton.isDisabled() && (settings.isEnterToSend() && e.getCode() == KeyCode.ENTER
-				|| !settings.isEnterToSend() && e.getCode() == KeyCode.ENTER && e.isControlDown()))
-			postMessage();
-		postButton.setDisable(messageTextArea.getText().isBlank() || currentChat == null);
+		if (!postingPermanentlyDisabled) {
+			if (!postButton.isDisabled() && (settings.isEnterToSend() && e.getCode() == KeyCode.ENTER
+					|| !settings.isEnterToSend() && e.getCode() == KeyCode.ENTER && e.isControlDown()))
+				postMessage();
+			postButton.setDisable(messageTextArea.getText().isBlank() || currentChat == null);
+		} else if (!infoLabel.getText().equals("You need to go online to send more messages"))
+			// Informing the user that he is a f*cking moron and should use Envoy online
+			// because he ran out of messageIDs to use
+			updateInfoLabel("You need to go online to send more messages", Color.RED);
 	}
 
 	/**
@@ -286,6 +298,12 @@ public final class ChatScene {
 	 */
 	@FXML
 	private void postMessage() {
+		postingPermanentlyDisabled = !(client.isOnline() || localDB.getIDGenerator().hasNext());
+		if (postingPermanentlyDisabled) {
+			postButton.setDisable(true);
+			updateInfoLabel("You need to go online to send more messages", Color.RED);
+			return;
+		}
 		final var text = messageTextArea.getText().strip();
 		if (text.isBlank()) throw new IllegalArgumentException("A message without visible text can not be sent.");
 		try {
@@ -322,6 +340,19 @@ public final class ChatScene {
 	 */
 	private void scrollToMessageListEnd() { messageList.scrollTo(messageList.getItems().size() - 1); }
 
+	/**
+	 * Updates the {@code infoLabel}.
+	 *
+	 * @param text     the text to use
+	 * @param textfill the color in which to display information
+	 * @since Envoy Client v0.1-beta
+	 */
+	private void updateInfoLabel(String text, Paint textfill) {
+		infoLabel.setText(text);
+		infoLabel.setTextFill(textfill);
+		infoLabel.setVisible(true);
+	}
+
 	// Context menu actions
 
 	@FXML

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

@@ -115,8 +115,7 @@ public final class LoginScene {
 		if (registerCheckBox.isSelected() && !passwordField.getText().equals(repeatPasswordField.getText())) {
 			new Alert(AlertType.ERROR, "The entered password is unequal to the repeated one").showAndWait();
 			repeatPasswordField.clear();
-		}
-		else performHandshake(
+		} else performHandshake(
 				new LoginCredentials(userTextField.getText(), passwordField.getText().toCharArray(), registerCheckBox.isSelected(), Startup.VERSION));
 	}
 
@@ -190,9 +189,8 @@ public final class LoginScene {
 
 		localDB.synchronize();
 
-		if (client.isOnline()) {
-			writeProxy.flushCache();
-		} else
+		if (client.isOnline()) writeProxy.flushCache();
+		else
 			// Set all contacts to offline mode
 			localDB.getChats()
 				.stream()

src/main/resources/fxml/ChatScene.fxml

@@ -19,27 +19,27 @@
 	fx:controller="envoy.client.ui.controller.ChatScene">
 	<columnConstraints>
 		<ColumnConstraints hgrow="SOMETIMES"
-			maxWidth="1.7976931348623157E308" minWidth="10.0" percentWidth="20.0"
+			maxWidth="1.7976931348623157E308" minWidth="10.0" percentWidth="25.0"
 			prefWidth="161.0" />
 		<ColumnConstraints hgrow="SOMETIMES"
 			maxWidth="1.7976931348623157E308" minWidth="10.0" percentWidth="65.0"
 			prefWidth="357.0" />
-		<ColumnConstraints hgrow="SOMETIMES"
-			maxWidth="1.7976931348623157E308" minWidth="6.285736083984375"
-			percentWidth="15.0" prefWidth="48.000030517578125" />
+		<ColumnConstraints hgrow="SOMETIMES" maxWidth="10.0"
+			minWidth="10.0" percentWidth="10.0" prefWidth="10.0" />
 	</columnConstraints>
 	<rowConstraints>
 		<RowConstraints maxHeight="1.7976931348623157E308"
 			minHeight="10.0" percentHeight="10.0" prefHeight="70.0"
 			vgrow="SOMETIMES" />
 		<RowConstraints maxHeight="1.7976931348623157E308"
-			minHeight="10.0" percentHeight="70.0" prefHeight="326.2857404436384"
-			vgrow="SOMETIMES" />
+			minHeight="10.0" percentHeight="7.0" vgrow="SOMETIMES" />
 		<RowConstraints maxHeight="1.7976931348623157E308"
-			minHeight="10.0" percentHeight="5.0" prefHeight="50.0"
+			minHeight="10.0" percentHeight="60.0" prefHeight="50.0"
 			vgrow="SOMETIMES" />
+		<RowConstraints maxHeight="50.0" minHeight="10.0"
+			percentHeight="2.0" prefHeight="50.0" vgrow="SOMETIMES" />
 		<RowConstraints maxHeight="1.7976931348623157E308"
-			minHeight="10.0" percentHeight="15.0" prefHeight="100.0"
+			minHeight="10.0" percentHeight="21.0" prefHeight="100.0"
 			vgrow="SOMETIMES" />
 	</rowConstraints>
 	<children>
@@ -56,7 +56,7 @@
 				<ContextMenu anchorLocation="CONTENT_TOP_LEFT">
 					<items>
 						<MenuItem fx:id="deleteContactMenuItem"
-							mnemonicParsing="false" text="Delete" onAction="#deleteContact" />
+							mnemonicParsing="false" onAction="#deleteContact" text="Delete" />
 					</items>
 				</ContextMenu>
 			</contextMenu>
@@ -72,8 +72,8 @@
 		</Label>
 		<Button fx:id="settingsButton" mnemonicParsing="true"
 			onAction="#settingsButtonClicked" text="_Settings"
-			GridPane.columnIndex="1" GridPane.columnSpan="2" GridPane.halignment="RIGHT"
-			GridPane.valignment="CENTER">
+			GridPane.columnIndex="1" GridPane.columnSpan="2"
+			GridPane.halignment="RIGHT" GridPane.valignment="CENTER">
 			<GridPane.margin>
 				<Insets bottom="10.0" left="5.0" right="10.0" top="10.0" />
 			</GridPane.margin>
@@ -82,7 +82,7 @@
 			</padding>
 		</Button>
 		<ListView fx:id="messageList" prefHeight="257.0"
-			prefWidth="155.0" GridPane.columnIndex="1" GridPane.columnSpan="2"
+			prefWidth="465.0" GridPane.columnIndex="1" GridPane.columnSpan="2"
 			GridPane.rowIndex="1" GridPane.rowSpan="2">
 			<GridPane.margin>
 				<Insets bottom="5.0" left="5.0" right="10.0" top="5.0" />
@@ -93,25 +93,25 @@
 			<contextMenu>
 				<ContextMenu anchorLocation="CONTENT_TOP_LEFT">
 					<items>
-						<MenuItem mnemonicParsing="false" text="Copy"
-							onAction="#copyMessage" />
-						<MenuItem mnemonicParsing="false" text="Delete"
-							onAction="#deleteMessage" />
-						<MenuItem mnemonicParsing="false" text="Forward"
-							onAction="#forwardMessage" />
-						<MenuItem mnemonicParsing="false" text="Quote"
-							onAction="#quoteMessage" />
+						<MenuItem mnemonicParsing="false" onAction="#copyMessage"
+							text="Copy" />
+						<MenuItem mnemonicParsing="false"
+							onAction="#deleteMessage" text="Delete" />
+						<MenuItem mnemonicParsing="false"
+							onAction="#forwardMessage" text="Forward" />
+						<MenuItem mnemonicParsing="false"
+							onAction="#quoteMessage" text="Quote" />
 					</items>
 				</ContextMenu>
 			</contextMenu>
 		</ListView>
 		<Button fx:id="postButton" defaultButton="true" disable="true"
 			mnemonicParsing="true" onAction="#postMessage" prefHeight="10.0"
-			prefWidth="65.0" text="_Post" GridPane.columnIndex="2"
-			GridPane.halignment="CENTER" GridPane.rowIndex="3"
-			GridPane.valignment="CENTER">
+			prefWidth="75.0" text="_Post" GridPane.columnIndex="2"
+			GridPane.halignment="CENTER" GridPane.rowIndex="4"
+			GridPane.valignment="BOTTOM">
 			<GridPane.margin>
-				<Insets bottom="5.0" left="5.0" right="5.0"/>
+				<Insets bottom="10.0" left="5.0" right="10.0" />
 			</GridPane.margin>
 			<padding>
 				<Insets bottom="5.0" left="5.0" right="5.0" top="5.0" />
@@ -125,8 +125,8 @@
 			<contextMenu>
 				<ContextMenu anchorLocation="CONTENT_TOP_LEFT">
 					<items>
-						<MenuItem mnemonicParsing="false" text="Copy and Send"
-							onAction="#copyAndPostMessage" />
+						<MenuItem mnemonicParsing="false"
+							onAction="#copyAndPostMessage" text="Copy and Send" />
 					</items>
 				</ContextMenu>
 			</contextMenu>
@@ -135,7 +135,7 @@
 			onInputMethodTextChanged="#messageTextUpdated"
 			onKeyPressed="#checkPostConditions" onKeyTyped="#checkKeyCombination"
 			prefHeight="200.0" prefWidth="200.0" wrapText="true"
-			GridPane.columnIndex="1" GridPane.rowIndex="3">
+			GridPane.columnIndex="1" GridPane.rowIndex="4">
 			<GridPane.margin>
 				<Insets bottom="10.0" left="5.0" right="5.0" top="5.0" />
 			</GridPane.margin>
@@ -145,20 +145,20 @@
 		</TextArea>
 		<Button mnemonicParsing="true"
 			onAction="#addContactButtonClicked" text="_Add Contacts"
-			GridPane.halignment="CENTER" GridPane.rowIndex="3"
+			GridPane.halignment="CENTER" GridPane.rowIndex="4"
 			GridPane.valignment="CENTER">
 			<padding>
 				<Insets bottom="5.0" left="5.0" right="5.0" top="5.0" />
 			</padding>
 			<GridPane.margin>
-				<Insets bottom="5.0" left="5.0" right="5.0" top="5.0" />
+				<Insets bottom="5.0" left="10.0" right="5.0" top="5.0" />
 			</GridPane.margin>
 		</Button>
 		<Label id="remainingCharsLabel" fx:id="remainingChars"
 			ellipsisString="" maxHeight="30.0" maxWidth="180.0" prefHeight="30.0"
 			prefWidth="180.0" text="remaining chars: 0/x" textFill="LIME"
 			textOverrun="LEADING_WORD_ELLIPSIS" visible="false"
-			GridPane.columnIndex="1" GridPane.rowIndex="2">
+			GridPane.columnIndex="1" GridPane.rowIndex="3">
 			<GridPane.margin>
 				<Insets bottom="5.0" left="5.0" right="5.0" top="5.0" />
 			</GridPane.margin>
@@ -174,5 +174,15 @@
 					wrapText="true" />
 			</tooltip>
 		</Label>
+		<Label fx:id="infoLabel" text="Something happened"
+			textFill="#faa007" visible="false" GridPane.columnIndex="1"
+			GridPane.rowIndex="1">
+			<GridPane.margin>
+				<Insets bottom="5.0" left="5.0" right="5.0" top="5.0" />
+			</GridPane.margin>
+			<padding>
+				<Insets bottom="5.0" left="5.0" right="5.0" top="5.0" />
+			</padding>
+		</Label>
 	</children>
 </GridPane>