Support RTL

[Abu-Abdullah]

Hi,

i have an issue of having 'JOptionPane.showOptionDialog' RTL when the parentComponent is JInternalFrame/JDesktopPane, it is still displayed LTR.

just to mentioned it is working correctly using the metal or any internal LnF

[DevCharly]

And it works if the parent is of another type?

Could you post a screenshot?

I can not reproduce it...

[Abu-Abdullah]

please find:
FlatLaf

Metal

JOptionPane seems to work fine when parent is JFrame. I'm still checking the case.

[Abu-Abdullah]

sorry, the Text Area inside the JOptionPane has the issue

[DevCharly]

The first and last lines are right aligned. So it seems that the dialog/textarea width is too small and the text is wrapped...

[Abu-Abdullah]

you are right, but how can we make the wrapped text RTL

[DevCharly]

how can we make the wrapped text RTL

Good question. I don't know...

Can you please give me some details on how you pass the text to the option pane.
Is it a single string? And does it contain line separators?
Or is it a special JTextArea or any other custom component?

[Abu-Abdullah]

yes, im using in the message System.lineSeparator() to seperate the lines. no special components

[DevCharly]

The option pane has the ability to wrap longer lines.
This is disabled in most/all LaFs.
But in FlatLaf it is enabled and wraps at 80 characters per line.
Maybe this causes the problem.

Please try adding following to disable wrapping (after setting FlatLaf):

UIManager.put( "OptionPane.maxCharactersPerLine", 0 );

[Abu-Abdullah]

thank you, this solved it

[DevCharly]

It turned out that this is a bug in JOptionPane. When wrapping longer text the option pane creates a label for each line and puts those labels into a vertical Box that uses BoxLayout.Y_AXIS. This aligns the labels always to the left. If option pane would use BoxLayout.PAGE_AXIS, then the labels would be aligned to the right in RTL or to the left in LTR.

Anyway, I've implemented a fix in FlatLaf.