Java Swing中的MouseMotionListener，将其与组件内部的组件一起使用 [英] MouseMotionListener in Java Swing, using it with components inside components etc

问题描述

我正在使用Swing中的Touch User界面。虽然我知道这不是最佳的，但我的截止日期很短，没有时间使用触摸屏特定的GUI包（如果有的话）。

I am working on a Touch User interface in Swing. While I know this isn't optimal, I am on a short deadline and don't have time to Touch-screen specific GUI packages (if there are any).

我希望我的用户能够在屏幕上滑动他们的手指，并且我制作的特殊JScrollPane视图随之移动。
代码非常简单 -

I want my users to be able to 'swipe' their finger across the screen, and the view of a special JScrollPane I made moves with it. The code is very simple -

    public class PanScrollPane extends JScrollPane implements MouseMotionListener{  
public PanScrollPane() {
    super();        
    this.addMouseMotionListener(this);      
}
@Override
public void mouseDragged(MouseEvent arg0) {
    System.out.println("Mouse Dragged!");       
}
@Override
public void mouseMoved(MouseEvent arg0) {
    System.out.println("Mouse Moved!");     
}

我遇到的问题是JScrollPane是所有种类的容器JComponents。当我第一次开始研究这个时，我发现MouseMovedEvent和MouseDraggedEvent会向上传播'GUI树'，直到他们遇到一个带有专门针对该事件的侦听器的Component。现在看来，我添加到panScrollPane的任何组件都会阻止任何这些MouseMotion事件，让我无法平移。

The problem I'm having is that the JScrollPane is a container for all sorts of JComponents. When I first started working on this, I figured the MouseMovedEvent and MouseDraggedEvent would propagate up the 'GUI tree', untill they encountered a Component with a listener specifically for that event. Now it seems that any component I add to the panScrollPane blocks any of these MouseMotion events, leaving me unable to pan.

    panScrollPane.add(new JButton("This thing blocks any mouse motion events"));

我想用手传播MouseEvent（将侦听器添加到每个组件，然后让它们发送事件他们的父母）会工作。然而，这是一项非常耗时的工作，因为我宁愿把时间花在其他事情上，所以我想知道你们中是否有人知道这个问题的任何解决办法。

I figured propagating the MouseEvent by hand (adding listeners to every single component and then having them send the event to their parent) would work. This, however, is a very time-intensive undertaking and as I would rather spend my time working on other things, I was wondering if any of you know any work-around for this problem.

感谢阅读，希望感谢您的回答！ ：）

Thanks for reading, and hopefully thanks for answering! :)

编辑：让我的意图更清晰。我只希望panPanel捕获mousemotion事件，任何其他事件（如MouseClick，MouseRelease）应该正常处理

edit: To make my intentions clearer. I only want the mousemotion events to be caught by the panPanel, any other event (like MouseClick, MouseRelease) should be processed normally

推荐答案

如何使用 GlassPane ？我认为它的意思是准确地解决这些类型的情况。

How about using a GlassPane? I think its meant to address exactly these types of situations.

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