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Longstanding Issue Of Back Button In BiDi/RTL

We've had a long standing annoyance with Codename One's RTL (...
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Longstanding Issue Of Back Button In BiDi/RTL

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We've had a long standing annoyance with Codename One's RTL (Right To Left languages, e.g. Arabic/Hebrew etc.) where the back button was still pointing in the wrong direction on iOS.
This was REALLY annoying to such a great extent that up until recently we recommended that people don't use RTL on iOS devices.

Well we finally fixed it, what took us so long was the desire to "do it right" but we couldn't figure out what the right thing was?

Basically the iOS 6 back button is broken since it has a very specific direction and angle it can't be cut as a 9-piece border and has to actually appear as a horizontal image border. My initial thoughts were to allow a component to define an RTL specific style attribute (in this case border), however doing something like this would be painful and just the thought of going back and editing all the themes seemed excessive.

So I added a method into the image class called mirror() which you can now invoke to get an exact mirror image of the given image. and into the border class we added the ability to get an RTL border, this is only implemented for horizontal image borders which is the source of this specific problem. This isn't generic but it works rather well and seamlessly! The back button will "just reverse" on RTL regardless of the theme you use and will act as you would expect starting with the upcoming update.

Codename One Java Rock Stars
As a side note, we will not be traveling to Java One this year as all our talks got rejected. This is after having packed rooms and rock star trophy from the previous Java One. Its a shame that Oracle is such a monocolture where you can't talk about alternative approaches within their conference. I can't say I'm too disappointed about not going, since leaving Moscone Java One hasn't been the same.

I am very excited about attending JavaZone which looks like a REALLY cool conference by some very cool guys, can't wait to go there.

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Posted by Shai Almog

Shai is the co-founder of Codename One. He's been a professional programmer for over 25 years. During that time he has worked with dozens of companies including Sun Microsystems.
For more follow Shai on Twitter & github.