我有一个复合树。我通过覆盖JPanel
将此树绘制为Graphics
宽度paintComponent(Graphics gr)
对象。我的问题是:如何访问点击哪个组件?
我只想出了琐碎和糟糕的解决方案,所以这就是我转向你的原因。提前谢谢!
答案 0 :(得分:2)
您需要存储的形状。 当您收到鼠标单击事件时:
public void mouseClicked(MouseEvent e) {
你将拥有来自
的x和y e.getPoint().getX()
e.getPoint().getY()
然后,您可以遍历形状,并查看Shape是否包含上述点。来自形状的Javadoc:
/**
* Tests if the specified coordinates are inside the boundary of the
* <code>Shape</code>, as described by the
* <a href="{@docRoot}/java/awt/Shape.html#def_insideness">
* definition of insideness</a>.
* @param x the specified X coordinate to be tested
* @param y the specified Y coordinate to be tested
* @return <code>true</code> if the specified coordinates are inside
* the <code>Shape</code> boundary; <code>false</code>
* otherwise.
* @since 1.2
*/
public boolean contains(double x, double y);