Extending JOptionPane the clean way

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Carsten Zerbst - 12 Jan 2005 15:37 GMT

Hello,

I want to have a dialog with additional display of details which only open
on request. To achieve this I could

* start from scratch. I have to reinvent all the work done in JOptionPane
again
* extend JOptionPane. But then I would have to extend BasicOptionPaneUI as
well, which will of course breaking the usage of 3d party plafs ....

How do you things like that ? The same problems occures often, e.g.
with a ComboBox with an Tree instead of a List ...

Bye, Carsten

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Andrey Kuznetsov - 13 Jan 2005 23:38 GMT

> I want to have a dialog with additional display of details which only open
> on request. To achieve this I could
[quoted text clipped - 3 lines]
> * extend JOptionPane. But then I would have to extend BasicOptionPaneUI as
> well, which will of course breaking the usage of 3d party plafs ....

Carsten,

all you need is to pass appropriate components to
JOptionPane#showOptionDialog(
Component parentComponent,
Object message, String title, int optionType,
int messageType, Icon icon,
Object[] options, Object initialValue)

Javadoc says:
"options - an array of objects indicating the possible choices the user can
make;
if the objects are components, they are rendered properly;
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
non-String objects are rendered using their toString methods;
if this parameter is null, the options are determined by the Look and Feel."

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Andrey Kuznetsov
http://uio.dev.java.net 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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Carsten Zerbst - 14 Jan 2005 13:23 GMT

Am Fri, 14 Jan 2005 00:38:10 +0100 schrieb Andrey Kuznetsov:

> all you need is to pass appropriate components to
> JOptionPane#showOptionDialog(
>

This approach does not work. At least it's looking disgusting.
The documentation of BasicOptionPaneUI says about the layout

------------------
| i | message |
| c | message |
| o | message |
| n | message |
------------------
| buttons |
|________________|

Which gives this with just a customized component as message

    -------------------------
| i | message      |
| c | message      |
| o | message      |
| n |             |
    | | Show Detail [X]     |
    | | Additional Details|
    | |            |
-------------------------
| buttons      |
|_______________________|

Whereas I want to have something like this

-------------------------
| i | message     |
| c | message      |
| o | message      |
| n | message      |
    -------------------------
    | Show Details [X]     |
    | Optional Detail View    |
    |            |
-------------------------
| buttons      |
|_______________________|

So one need a new line in the layout which is not possible with
BasicOptionPaneUI

Bye, Carsten

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Extending JOptionPane the clean way

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