feat: add initial loading screen

src/main/java/fr/insa/clavardator/ui/MainController.java

@@ -7,20 +7,27 @@ import fr.insa.clavardator.ui.dialogs.EditUsernameDialogController;
 import fr.insa.clavardator.ui.dialogs.SnackbarController;
 import fr.insa.clavardator.ui.users.UserListController;
 import fr.insa.clavardator.users.CurrentUser;
+import javafx.application.Platform;
 import javafx.fxml.FXML;
 import javafx.fxml.FXMLLoader;
 import javafx.fxml.Initializable;
-import javafx.scene.control.Label;
 import javafx.scene.layout.StackPane;
+import javafx.scene.layout.VBox;
 
 import java.io.IOException;
 import java.net.URL;
 import java.util.ResourceBundle;
+import java.util.Timer;
+import java.util.TimerTask;
 
 public class MainController implements Initializable {
 
 	@FXML
 	private StackPane root;
+	@FXML
+	private VBox loadingContainer;
+	@FXML
+	private VBox loginContainer;
 
 	@FXML
 	private ToolbarController toolbarController;
@@ -53,9 +60,37 @@ public class MainController implements Initializable {
 		editUserDialogController.show(root, EditUsernameDialogController.Mode.EDIT);
 	}
 
+	private void showChat() {
+		loadingContainer.setVisible(false);
+		loginContainer.setVisible(false);
+	}
+
+	private void showLogin() {
+		loadingContainer.setVisible(false);
+		loginContainer.setVisible(true);
+	}
+
 	@Override
 	public void initialize(URL url, ResourceBundle rb) {
 		snackbar = new JFXSnackbar(root);
+
+		Timer t = new Timer();
+		t.schedule(new TimerTask() {
+			@Override
+			public void run() {
+				Platform.runLater(() -> CurrentUser.getInstance().setState(CurrentUser.State.VALID));
+			}
+		}, 2000);
+
+		CurrentUser.getInstance().addObserver(propertyChangeEvent -> {
+			if (propertyChangeEvent.getPropertyName().equals("state")) {
+				if (propertyChangeEvent.getNewValue().equals(CurrentUser.State.VALID))
+					showChat();
+				else
+					showLogin();
+			}
+		});
+
 		userListController.addRefreshUserListener(() -> System.out.println("refresh event"));
 		userListController.addUserSelectedListener((user) -> chatController.setRemoteUser(user));
 		chatController.addAttachmentListener(() -> System.out.println("attach event"));

src/main/java/fr/insa/clavardator/users/CurrentUser.java

@@ -1,10 +1,15 @@
 package fr.insa.clavardator.users;
 
+import org.jetbrains.annotations.Nullable;
+
 public class CurrentUser extends User {
 	private static CurrentUser instance = null;
 
+	private State state;
+
 	private CurrentUser(int uniqueId, String username) {
 		super(uniqueId, username);
+		state = State.UNINITIALIZED;
 	}
 
 	/**
@@ -27,4 +32,20 @@ public class CurrentUser extends User {
 	public static CurrentUser getInstance() {
 		return instance;
 	}
+
+	public State getState() {
+		return state;
+	}
+
+	public void setState(State state) {
+		instance.pcs.firePropertyChange("state", this.state, state);
+		this.state = state;
+	}
+
+
+	public enum State {
+		UNINITIALIZED,
+		VALID,
+		INVALID
+	}
 }

src/main/resources/fr/insa/clavardator/ui/scene.fxml

@@ -1,11 +1,16 @@
 <?xml version="1.0" encoding="UTF-8"?>
 
 <!--suppress JavaFxUnresolvedFxIdReference -->
-<?import javafx.scene.layout.HBox?>
+<?import com.jfoenix.controls.JFXSpinner?>
-<?import javafx.scene.layout.StackPane?>
+<?import javafx.scene.control.Label?>
-<?import javafx.scene.layout.VBox?>
+<?import javafx.scene.layout.*?>
 <StackPane xmlns:fx="http://javafx.com/fxml/1"
-           xmlns="http://javafx.com/javafx/11.0.1" fx:controller="fr.insa.clavardator.ui.MainController" fx:id="root">
+           xmlns="http://javafx.com/javafx/11.0.1"
+           fx:controller="fr.insa.clavardator.ui.MainController"
+           stylesheets="@styles.css"
+           styleClass="container"
+           fx:id="root">
+  <StackPane fx:id="mainContainer">
     <fx:include source="dialogs/editUsernameDialog.fxml" fx:id="editUserDialog"/>
     <fx:include source="dialogs/aboutDialog.fxml" fx:id="aboutDialog"/>
     <VBox>
@@ -16,3 +21,11 @@
       </HBox>
     </VBox>
   </StackPane>
+  <VBox alignment="CENTER" fx:id="loginContainer" styleClass="container" spacing="30">
+    <Label>ERROR</Label>
+  </VBox>
+  <VBox alignment="CENTER" fx:id="loadingContainer" styleClass="container" spacing="30">
+    <Label>Initialisation de Clavardator...</Label>
+    <JFXSpinner/>
+  </VBox>
+</StackPane>