Helper class to load menus in backgroud.

Author: ricardojlrufino

app/src/cc/arduino/view/JMenuLazy.java

@@ -1,102 +1,105 @@
 package cc.arduino.view;
 
 import java.awt.Component;
-import java.io.File;
 import java.util.LinkedList;
 
-import javax.swing.Icon;
-import javax.swing.ImageIcon;
 import javax.swing.JMenu;
 import javax.swing.JMenuItem;
 import javax.swing.JPopupMenu;
 import javax.swing.JSeparator;
 import javax.swing.event.MenuEvent;
 import javax.swing.event.MenuListener;
 
-import processing.app.BaseNoGui;
-
 /**
- * Avoid break rendering of menu while load full menu tree in background  
+ * Avoid slow rendering of menu while load full menu tree in background
+ * 
  * @author Ricardo JL Rufino - ([email protected])
  * @date 13 de mai de 2020
  */
 public class JMenuLazy extends JMenu {
-  
+
   private LinkedList<Component> components = new LinkedList<>();
-  
+
   private boolean loading = false;
-  
+
   public JMenuLazy(String s) {
     super(s);
-    addMenuListener(new MenuListenerLazy());
+    addMenuListener(menuListener);
   }
 
   public void setLoading(boolean loading) {
     this.loading = loading;
     this.setEnabled(!loading);
   }
-  
+
   public boolean isLoading() {
     return loading;
   }
-  
+
   @Override
   public Component add(Component c) {
-    if(isLoading()) {
+    if (isLoading()) {
       components.add(c);
       return c;
     }
     return super.add(c);
   }
-  
+
   @Override
   public JMenuItem add(JMenuItem c) {
-    if(isLoading()) {
+    if (isLoading()) {
       components.add(c);
       return c;
     }
     return super.add(c);
   }
-  
+
   @Override
   public void addSeparator() {
-    if(isLoading()) {
+    if (isLoading()) {
       components.add(new JPopupMenu.Separator());
       return;
     }
     super.addSeparator();
   }
-  
-  private class MenuListenerLazy implements MenuListener{ 
+
+  public void removeAll() {
+    super.removeAll();
+    synchronized (components) {
+      components.clear();
+    }
+  };
+
+  private MenuListener menuListener = new MenuListener() {
 
     @Override
     public void menuSelected(MenuEvent e) {
-      if(!isLoading()) {
-        if(loading == false) {
-          if(!components.isEmpty()) {
+      if (!isLoading()) {
+        if (loading == false) {
+          if (!components.isEmpty()) {
             for (Component component : components) {
-              if(component instanceof JSeparator) {
+              if (component instanceof JSeparator) {
                 JMenuLazy.super.addSeparator();
-              }else {
+              } else {
                 JMenuLazy.super.add(component);
-                
+
               }
             }
             components.clear();
           }
         }
       }
     }
-  
+
     @Override
     public void menuDeselected(MenuEvent e) {
-      
+
     }
-  
+
     @Override
     public void menuCanceled(MenuEvent e) {
-      
+
     }
-  }
+  };
 
 }