How do I lock the mouse inside a JFrame

Question

I would like to lock the mouse inside a JFrame. That is, the mouse can not leave the contents of the JFrame (unless the user hits escape, alt-tab, or the window otherwise looses focus). Ideas?

Thanks!

Answer 1

I'm not sure if there's a more automatic way of doing that, but you could use the Robot class to set the mouse position. So in the event handler for when the JFrame gains focus you can start watching the mouse move event, and when the mouse moves just make sure it stays within the JFrame. If it leaves the JFrame you can use the Robot class to set the mouse's position to go back.

Then when the window loses focus, you can unregister from the mouse move event.

Answer 2

이 링크 쉽게해야합니다.

시도 :

=([COLUMN2] - [COLUMN1])*1440

.

이렇게하면 두 날짜 사이의 총 분 수를 반환합니다

업데이트

Answer 3

Another workaround I just thought of - lock the cursor to the centre of the Frame, and make it invisible.Then render a software cursor where the real cursor should be. You can then lock the cursor to whatever area you want.

Answer 4

Here's a sneaky one could work if you don't use mouse button 2 in your game. Use a Robot to press down BUTTON2.

The idea is so the mouse gets dragged, not moved. Whenever you get a mouse moved event, it's because the user has released button2, so press it down again.

Whenever you get a mouse dragged event, if the mouse is outside the window, put it back in.