Vaadin Web应用开发教程(15):UI组件-Button

Button 按钮，在前面Vaadin Web应用开发教程(5):Vaadin Web应用的基本组成部分中介绍事件处理时已经对Button的用法做了说明。当用户点击按钮时会触发Button.ClickEvent ，可以使用 Button.ClickListener 来侦听这个事件。

[java]
public class TheButton extends CustomComponent
                       implements Button.ClickListener {
    Button thebutton;

    public TheButton() {
        // Create a Button with the given caption.
        thebutton = new Button ("Do not push this button");

        // Listen for ClickEvents.
        thebutton.addListener(this);

        setCompositionRoot(thebutton);
    }

    /** Handle click events for the button. */
    public void buttonClick (Button.ClickEvent event) {
        thebutton.setCaption ("Do not push this button again");
    }}

public class TheButton extends CustomComponent
implements Button.ClickListener {
Button thebutton;

    public TheButton() {
        // Create a Button with the given caption.
        thebutton = new Button ("Do not push this button");

// Listen for ClickEvents.
thebutton.addListener(this);

setCompositionRoot(thebutton);
}

    /** Handle click events for the button. */
    public void buttonClick (Button.ClickEvent event) {
        thebutton.setCaption ("Do not push this button again");
    }}

为多个按钮使用同一个Listener时，可以通过Event的getButton() 方法来区分不同的按钮。

作者：mapdigit

补充：Web开发 , 其他 ,