feat: add setters for features configured in constructor

Close #79

Author: mlopezFC

src/main/java/com/flowingcode/addons/applayout/AppLayout.java

@@ -42,6 +42,9 @@
 @CssImport(value = "./styles/applayout-styles.css", themeFor = "fc-applayout")
 public class AppLayout extends Div {
 
+  private static final String PROFILE_SLOT_NAME = "profile";
+  private static final String APP_LAYOUT_TITLE_SLOT_NAME = "title";
+  private static final String TITLE_ATTRIBUTE_NAME = "title";
   private final List<Component> menuItems = new ArrayList<>();
   private final List<Component> toolbarComponents = new ArrayList<>();
 
@@ -59,17 +62,29 @@ public AppLayout(Image logo, Component menuHeader, String title) {
 
   private AppLayout(Component menuHeader, String aTitle, Image aLogo) {
     if (aLogo != null) {
-      aLogo.getElement().setAttribute("slot", "title");
-      add(aLogo);
+      addToTitleSection(aLogo);
     }
     if (menuHeader != null) {
-      menuHeader.getElement().setAttribute("slot", "profile");
-      add(menuHeader);
+      setMenuHeader(menuHeader);
     }
     Div title = new Div();
     title.setText(aTitle);
-    title.getElement().setAttribute("slot", "title");
-    add(title);
+    addToTitleSection(title);
+  }
+
+  public void addToTitleSection(Component component) {
+    component.getElement().setAttribute("slot", APP_LAYOUT_TITLE_SLOT_NAME);
+    add(component);
+  }
+
+  /**
+   * Sets the component to be shown before the menu in the drawer.
+   * @param menuHeader
+   */
+  public void setMenuHeader(Component menuHeader) {
+    getChildren().filter(item->PROFILE_SLOT_NAME.equals(item.getElement().getAttribute("slot"))).forEach(this::remove);
+    menuHeader.getElement().setAttribute("slot", PROFILE_SLOT_NAME);
+    add(menuHeader);
   }
 
   public void setMenuItems(Component... someMenuitems) {
@@ -120,7 +135,7 @@ public boolean isMenuVisible() {
 
   /** Set the toolbar title */
   public void setCaption(String caption) {
-    this.getElement().setAttribute("title", caption);
+    this.getElement().setAttribute(TITLE_ATTRIBUTE_NAME, caption);
   }
 
   /** Mantains the header fixed at the top so it never moves away. */