简体繁体 English

Java：透明JPanel上的MouseEvent

[英]Java: MouseEvent on transparent JPanel

原文 2011-09-24 05:53:51 1 1 java/ swing/ transparency/ mouseevent/ jframe

I have a LayeredPane with two JPanel s, all in a JFrame . 我有一个带有两个JPanel的LayeredPane ，都在JFrame 。 Both JPanel s are set to be transparent with setOpaque(false) . 两个JPanel都设置为setOpaque(false)透明。 However, I would like to capture mouse events on the (top, if it makes a difference) transparent panel. 但是，我想在（顶部，如果它有所不同）透明面板上捕获鼠标事件。 Is this possible, or should I just do it from the underlying JFrame ? 这是可能的，还是我应该从底层的JFrame做到这一点？ (It would definitely work to capture from the JFrame ; it just makes more logical sense to capture the events from the transparent frame). （肯定会从JFrame捕获;从透明帧中捕获事件更具逻辑意义）。

1 个解决方案

You can capture mouse events on whichever JPanel has a MouseListener attached to it, and is not encumbered by components that also have MouseListeners added, and who are laying on or above the original JPanel. 您可以在任何JPanel附加了MouseListener的情况下捕获鼠标事件，并且不会被添加了MouseListener的组件以及放置在原始JPanel上或上方的组件所阻碍。 This looks like a situation perfect for creating a small test class that is the most simple of GUI's, that has none of the bells and whistles of your GUI, but that illustrates your problem and hopeful solution. 这看起来非常适合创建一个最简单的GUI的小测试类，它没有GUI的花俏，但这说明了你的问题和有希望的解决方案。

Also, please know that the transparency does not play into any of this at all except as a distraction. 另外，请注意透明度除了作为分散注意力之外根本不会发挥任何透明度。