Enhances your ui

src/main/java/ch/hepia/ui/MainWindowController.java

@@ -11,6 +11,7 @@ import javafx.fxml.Initializable;
 import javafx.scene.canvas.Canvas;
 import javafx.scene.control.*;
 import javafx.scene.input.KeyCode;
+import javafx.scene.paint.Color;
 import org.json.JSONArray;
 
 import java.io.IOException;
@@ -93,9 +94,13 @@ public class MainWindowController implements Initializable {
     private void drawConnection(Connection connection, int x, int y){
         List<Section> sections = connection.getSections();
         for (int i = 0; i < sections.size(); i++){
+        	connectionCanvas.getGraphicsContext2D().setFill(Color.RED);
             connectionCanvas.getGraphicsContext2D().strokeLine(
-                    x + (800 / sections.size()) * i, y, 800 / sections.size(), y);
+                    x + (652 / sections.size()) * i, y, 652 / sections.size(), y);
+			connectionCanvas.getGraphicsContext2D().fillOval(x + (652 / sections.size()) * i - 5, y - 5,
+					10, 10);
         }
+		connectionCanvas.getGraphicsContext2D().fillOval(x + 620 - 5, y - 5, 10, 10);
     }
 
     /**
@@ -122,13 +127,16 @@ public class MainWindowController implements Initializable {
 
         launchItinaryButton.setOnAction(event -> {
             try {
+            	connectionCanvas.getGraphicsContext2D()
+						.clearRect(0, 0, connectionCanvas.getWidth(), connectionCanvas.getHeight());
+
                 JSONArray connections = transportApi.getConnections(
                         originComboBox.getValue(), destinationComboBox.getValue());
                 startStopLabel.setText(originComboBox.getValue() + " - " + destinationComboBox.getValue());
                 for (int i = 0; i < connections.length(); i++){
                     // Now iterating over connections
                     Connection c = new Connection.ConnectionBuilder(connections.getJSONObject(i)).build();
-                    drawConnection(c, 30, 100 + 30 * i);
+                    drawConnection(c, 30, 100 + 100 * i);
 
                 }
             } catch (IOException | ParseException e) {
@@ -137,7 +145,7 @@ public class MainWindowController implements Initializable {
         });
 
         sendMessageButton.setOnAction(event -> {
-            if (app.getUser().isPresent()){
+            if (app.getUser().isPresent() && !messageTextBox.getText().isEmpty()){
                 app.getMessageManager().sendChatMessage(new ChatMessage(app.getUser().get(), messageTextBox.getText()));
                 messageTextBox.clear();
             }