worldwind - 在 Java WorldWind 上跟踪鼠标位置

Question

我正在尝试使用addMouseListener. 它没有显示任何错误，我什至可以添加一个mouseClicked(MouseEvent e)，并且仍然没有错误。但最后，当我尝试使用它获取当前位置时，worldWindowGLCanvas1.getCurrentPosition()它显示为 NULL，即使我点击地球或外部......有人可以帮我这样做吗？不用担心多余的空间。由于网站不接受我的问题，我已经修改了:)

Answer 1

I'm not sure if this is what you're asking, but this was working for me:

final WorldWindowGLCanvas aCanvas = new WorldWindowGLCanvas();
aCanvas.setModel(new BasicModel());
aCanvas.getInputHandler().addMouseListener(new MouseAdapter() {
    @Override
    public void mouseClicked(MouseEvent pE) {

        Position aCurrentPosition = aCanvas.getCurrentPosition();

        //Or whatever work:      
        if(aCurrentPosition != null) {

            System.out.println("Current Pos= " + aCurrentPosition);

        } else {

            System.out.println("Current Pos is null!");

        }
    }
});

I added the null check to see if it would ever get null and it did not. The assumption this code is making is that a mouse click will re-center the globe to that position. Calling the aCanvas.getCurrentPosition() should return the center globe. If the canvas is not rendered or isn't visible, then this method would return null.