How can I "glue" JDialog to an owning JFrame ?

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bobjan - 31 Aug 2005 13:13 GMT

I have a non-modal JDialog with a JFrame as an owner.
On a mouse right-click the dialog becomes visible at the mouse
position. And it works fine. But when I start dragging JFrame , the
JDialog remains on the same screen position. Is there a way to "glue"
the dialog to the frame ?

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Thomas Fritsch - 31 Aug 2005 14:09 GMT

> I have a non-modal JDialog with a JFrame as an owner.
> On a mouse right-click the dialog becomes visible at the mouse
> position. And it works fine. But when I start dragging JFrame , the
> JDialog remains on the same screen position. Is there a way to "glue"
> the dialog to the frame ?

JFrame has addComponentListener and addMouseMotionListener methods,
inherited from Component. So you might want:
yourFrame.addComponentListener(new ComponentAdapter()
{
public void componentMoved(...) { ... }
});
or
yourFrame.addMouseMotionListener(new MouseAdapter()
{
public void mouseDragged(...) { ... }
});

But another question:
Why do you want to move the dialog at all, when the user moves the
frame? I think that would surprise your user, and hence would contradict
to the "principle of least astonishment"
<http://www.google.de/search?q=%22principle+of+least+astonishment%22>
And consider a desperate user's question "I just moved the dialog
totally off the screen. How can I close it now?" ;-)

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Andrey Kuznetsov - 31 Aug 2005 18:47 GMT

>I have a non-modal JDialog with a JFrame as an owner.
> On a mouse right-click the dialog becomes visible at the mouse
> position. And it works fine. But when I start dragging JFrame , the
> JDialog remains on the same screen position. Is there a way to "glue"
> the dialog to the frame ?

see http://jgui.imagero.com/tutorial.html#followHandler

BTW it easy to check dialog coordinates, so that it does not go offscreen.

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Andrey Kuznetsov
http://uio.imagero.com Unified I/O for Java
http://reader.imagero.com Java image reader
http://jgui.imagero.com Java GUI components and utilities

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Oliver Wong - 01 Sep 2005 19:55 GMT

> BTW it easy to check dialog coordinates, so that it does not go offscreen.

Does it handle multi-screen environments properly? I have a dual screen
set up at home, and some of the "tricks" that some apps I've encountered
(not nescessarily Java apps) don't work very well on dual screen setups.

I don't mean to challenge you or anything; I'm just curious as I don't
know of a solution for ensuring that something stays visible on some screen
in a multi screen setup.

- Oliver

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Andrey Kuznetsov - 02 Sep 2005 17:24 GMT

> Does it handle multi-screen environments properly? I have a dual screen
> set up at home, and some of the "tricks" that some apps I've encountered
[quoted text clipped - 3 lines]
> know of a solution for ensuring that something stays visible on some
> screen in a multi screen setup.

it should work with any given rectangle (for example - stay at right half of
3th screen).

Signature

Andrey Kuznetsov
http://uio.imagero.com Unified I/O for Java
http://reader.imagero.com Java image reader
http://jgui.imagero.com Java GUI components and utilities

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Oliver Wong - 02 Sep 2005 17:49 GMT

>> Does it handle multi-screen environments properly? I have a dual
>> screen set up at home, and some of the "tricks" that some apps I've
[quoted text clipped - 7 lines]
> it should work with any given rectangle (for example - stay at right half
> of 3th screen).

What if the screens don't form a triangle? For example, what if I have
one screen which has a resolution of 1600x1200, and another screen just to
the right of it whose resolution is 800x600? Then the logical layout of my
desktop might look like this:

________

| |
| | ____
| || |
|________||____|

Which as you can see, forms a (non-regular) hexagon.

- Oliver

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Andrey Kuznetsov - 03 Sep 2005 10:42 GMT

> What if the screens don't form a triangle? For example, what if I have
> one screen which has a resolution of 1600x1200, and another screen just to
[quoted text clipped - 6 lines]
> | || |
> |________||____|

In this case you can install your own handler instead.
Or I can change my handler to accept multiple rectangles.

Signature

Andrey Kuznetsov
http://uio.imagero.com Unified I/O for Java
http://reader.imagero.com Java image reader
http://jgui.imagero.com Java GUI components and utilities

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Mikael Flensborg - 01 Sep 2005 07:43 GMT

Test it on MacOS X :-)... It works as described :-)

/Mikael

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How can I "glue" JDialog to an owning JFrame ?

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