JavaFX EventHandler传递参数 [英] JavaFX EventHandler pass parameter

问题描述

    Rectangle rect1 = new Rectangle(10, 10, 20, 20);
    Rectangle rect2 = new Rectangle(60, 10, 20, 20);

    EventHandler<MouseEvent> event = new EventHandler<MouseEvent>() {
        @Override
        public void handle(MouseEvent ae) {
            System.out.println("aaa");
        }
    };

    rect1.setOnMouseClicked(event);
    rect2.setOnMouseClicked(event);

如何点击rect1打印aaa，点击rect2打印bbb？

How to click rect1 print aaa, click rect2 print bbb ?

在我的真实程序中，我有数百个矩形，在这种情况下，我有很多事情要做。所以我不想为每一个声明事件。

In my real program, I have hundreds of rectangles, and in the event, I have many things to do. So I don't want declare event for every one.

谢谢！

推荐答案

像这样：

Rectangle rect1 = new Rectangle(10, 10, 20, 20);
rect1.setUserData( "aaa" );

Rectangle rect2 = new Rectangle(60, 10, 20, 20);
rect2.setUserData( "bbb" );

EventHandler<MouseEvent> event = new EventHandler<MouseEvent>() 
{
    @Override
    public void handle( final MouseEvent ME ) 
    {
        Object obj = ME.getSource();  // you can also try ME.getTarget()

        if ( obj instanceof Rectangle )
        {
            System.out.println( ((Rectangle) obj).getUserData() );
        }
    }
};

rect1.setOnMouseClicked(event);
rect2.setOnMouseClicked(event);     

这篇关于JavaFX EventHandler传递参数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！