一般来说,我在 vaadin 框架上有一个问题。
我创建了一个类扩展 vaadin 应用程序(MyFirst),之后我使用 vaadin 可视化设计器(MyFormApp)创建了一个自定义组件。
我确实实例化了自定义组件 MyFormApp,并将其添加到 MyFirst 的主窗口中。
部署应用后,vaadin 生成的页面没有显示任何组件。
我的代码:
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package com.example.vaadin;
import com.vaadin.Application;
import com.vaadin.ui.*;
/**
*
* @author anis.bouchenafa
*/
public class MyFirst extends Application{
private Button newContact = new Button("Add contact");
private Button search = new Button("Search");
private Button share = new Button("Share");
private Button help = new Button("Help");
private HorizontalSplitPanel horizontalSplit = new HorizontalSplitPanel();
private TextField tf = new TextField();
@Override
public void init() {
//buildMainLayout();
MyFirstApp a = new MyFirstApp();
Window w = new Window("aness conf");
w.addComponent(a);
setMainWindow(w);
}
}
我的第二堂课是 MyFirstApp(自定义组件):
package com.example.vaadin;
import com.vaadin.annotations.AutoGenerated;
import com.vaadin.ui.AbsoluteLayout;
import com.vaadin.ui.CustomComponent;
import com.vaadin.ui.LoginForm;
public class MyFirstApp extends CustomComponent {
@AutoGenerated
private AbsoluteLayout mainLayout;
@AutoGenerated
private LoginForm loginForm_2;
/*- VaadinEditorProperties= {"grid":"RegularGrid,20","showGrid":true,"snapToGrid":true,"snapToObject":true,"movingGuides":false,"snappingDistance":10} */
/*- VaadinEditorProperties={"grid":"RegularGrid,20","showGrid":true,"snapToGrid":true,"snapToObject":true,"movingGuides":false,"snappingDistance":10} */
/**
* The constructor should first build the main layout, set the
* composition root and then do any custom initialization.
*
* The constructor will not be automatically regenerated by the
* visual editor.
*/
public MyFirstApp() {
buildMainLayout();
setCompositionRoot(mainLayout);
// TODO add user code here
}
@AutoGenerated
private AbsoluteLayout buildMainLayout() {
// common part: create layout
mainLayout = new AbsoluteLayout();
mainLayout.setImmediate(false);
mainLayout.setWidth("100%");
mainLayout.setHeight("100%");
// top-level component properties
setWidth("100.0%");
setHeight("100.0%");
// loginForm_2
loginForm_2 = new LoginForm();
loginForm_2.setStyleName("v-loginform");
loginForm_2.setImmediate(false);
loginForm_2.setWidth("340px");
loginForm_2.setHeight("-1px");
mainLayout.addComponent(loginForm_2, "top:160.0px;left:200.0px;");
return mainLayout;
}
}
servlet 执行后,浏览器上没有任何显示。