Java（Swing）-一次拖动两个窗口

Question

How can I have one window move with another? ie, I'd like a JDialog to follow a JFrame when the JFrame is being dragged. If the JFrame moves by (+5, +20), the JDialog needs to move the same.

I've tried using ComponentListeners, but I only receive drag events in chunks which causes the JDialog window to be jumpy while dragging the main JFrame. I've tried using MouseListeners, but I can't figure out how to detect events on the actual frame of the JFrame.

Answer 1

尝试使用ComponentListener.componentMoved事件，而不是监视JFrame上的拖动事件。

Answer 2

AFAIK here is no move multiple windows in AWT. To get the moves to be called at a similar time, I guess you want the JFrame decorations to be PL&F rendered. Put in a PL&F-specific hack to do the moves yourself, moving both windows at almost the same time. You may still have a problem with exposing bits of windows only to cover them up causing some performance degradation.

Answer 3

The component listener method works perfectly. I did something like this:

Point p = this.getLocation();
p.x += this.getWidth() + 10;
this.getOwner().setLocation(p);

Where the '10' is the space between the current window(a JDialog) and its owner which is to its right.