Package com.storedobject.vaadin

Class Application

java.lang.Object
com.storedobject.vaadin.Application
Direct Known Subclasses:
Application
public abstract class Application extends Object
Application is the base class for creating a 'single page' web applications. The 'single page' should be defined by extending ApplicationView class. 
 
 public class Demo extends Application {

    @Override
     protected ApplicationLayout createLayout() {
         return new MyLayout();
     }

    @Route("")
    public static class DemoView extends ApplicationView {

       @Override
       protected Application createApplication() {
           return new Demo();
       }
    }
 }

 public class MyLayout extends SplitLayout implements ApplicationLayout, ApplicationMenu {

     public MyLayout() {
         super(new Div(), new Div());
         setSplitterPosition(15);
         setHeight("100vh");
         setWidth("100vw");
         getPrimaryComponent().getElement().getStyle().set("background-color", "lightblue");
     }

     @Override
     public Component getComponent() {
         return this;
     }

     @Override
     public ApplicationMenu getMenu() {
         return this;
     }

     @Override
     public HasComponents getMenuPane() {
         return (Div)getPrimaryComponent();
     }

     @Override
     public void getContent(Component content) {
         addToSecondary(content);
     }

     @Override
     public void drawMenu(Application application) {
         getMenuPane().add(new HtmlComponent("hr"));
         add(application.createMenuItem(...));
         add(application.createMenuItem(...));
         add(application.createMenuItem(...));
     }
 }
The 'single page' can be any layout component that implements the interface ApplicationLayout. The layout typically contains a 'menu' area and 'content' area. One can use Vaadin's AppLayout or similar components as the base for this. The 'menu' area will contain ApplicationMenuItem instances and when a 'menu item' is clicked, the Runnable action associated with it will be executed. One may associate any Runnable action with a 'menu item' such as generating a report or invoking a View. If a View is invoked, its associated 'view component' is displayed in the 'content' area and its 'caption' is inserted as a new 'menu item' in the 'menu' area. The 'content' area displays only the 'active view' (currently selected or executed view) and hides all previously displayed 'views' but any those 'views' can be made active again by licking on its respective 'menu item' created from its 'caption'.
Author:
Syam