howto:vaadin简短教程

					vaadin应用程序的开发类似于桌面应用的开发。

5分钟教程:

首先要有一个主程序入口(继承com.Vaadin.Application),实现init方法(类似main方法)
代码示例: 
import com.Vaadin.Application;  import com.Vaadin.ui.*;  public class Dw_Vaadin_projectApplication extends com.Vaadin.Application { 	 public void init() { 	 /*... 创建主窗口 ...*/ 		 Window main = new Window("Dw_Vaadin_project Application");
         /*... 设定主窗口 ...*/ 
		 setMainWindow(main); 	 /*... 在主窗口中添加其他 UI 组件 ...*/ 		 Label label=new Label("Hello Vaadin user"); 		 main.addComponent(label); 		 Window window = new Window("Sub Window"); 		 main.addWindow(Window); 	 }  }
以下为效果图:

清单 1 代码的 UI 界面1小时教程:

以下以SpringRoo 的Pizzashop代码为例:
Pizzashop创建请遵照此篇wiz
1.Pizzashop应用入口类:
public class PizzaShopApplication extends Application { 
 
   
 
    @Override
    public void init() {
        Window window = createNewWindow();
        setMainWindow(window);
    }
/*... 创建一个单例的Window对象,并注册关闭事件避免内存泄露 ...*/
    public Window createNewWindow() {
        final Window window = new PizzaShopWindow();
 
        // remove window on close to avoid memory leaks
        window.addListener(new CloseListener() {
            public void windowClose(CloseEvent e) {
                if (getMainWindow() != window) {
                    PizzaShopApplication.this.removeWindow(window);
                }
            }
        });
 
        return window;
    }
 
    @Override
    public Window getWindow(String name) {
        // See if the window already exists in the application
        Window window = super.getWindow(name);
 
        // If a dynamically created window is requested, but
        // it does not exist yet, create it.
        if (window == null) {
            // Create the window object.
            window = createNewWindow();
            window.setName(name);
 
            // Add it to the application as a regular
            // application-level window
            addWindow(window);
        }
 
        return window;
    }
2.vaadin基础知识
vaadin采用组件式开发。一切都是围绕控件的。
重要概念:
component 组件 
navigator,导航 通过导航类实现页面切换,跳转
event & listener 事件与监听器 
container,item,properties  vaadin的数据抽象
详细介绍:
component 是组件基类,组件可以注册事件。vaadin提供很多组件,组件有自己特征的属性,还有通用属性
 
 
 
 
 
 
 
 



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