On 12 juin, 12:36, ciukes ciu...@gmail.com wrote:
My application will by displaying a country flag depending on a locale
selected form list. All the flags are gathered within LocaleFlag
(extends ImageBundle).
I want to be able to get flag image out of LocaleFlag having only a
locale name string in hand.
Er, let's start by saying that language/locale is distinct from
country. Using a flag to represent a locale is hardly a good idea (it
can be, in cases you're actually selecting a region/country and not a
language, for instance have distinct choices for GB and US).
List selection - Locale name string (e.g. uk) - LocaleFlag -
corresponding com.google.gwt.user.client.ui.Image instance.
So far I came up with a bit brute force spaghetti code solution. I
created LocaleName enumeration with getImage():Image abstract method.
Every enum value implements the method to return corresponding image
instance.
[...]
With this enum in hand I can call CountyCode.valueOf(UK).getImage()
and this satisfies my requirement. What I don't like is massive amount
of copy-paste code I have to create ( getImage() implementation have
to be developed for every single enum value).
Can you guys come up with a better solution? Ideally that would be
LocaleFlag.getImage(UK) method that could internally discover,
create and return Image instance.
The best way would be to make a new generator (which would extend or
call the ImageBundleGenerator). In this case, I would personally add
an ImageBundleWithLookup interface (extends ImageBundle) and a
corresponding generator, same as how ConstantsWithLookup relates to
Constants.
Basically, the generator would implement the lookup(String) method
(from ImageBundleWithLookup) as (for example):
private HashMapString,AbstractImagePrototype lookupCache;
public AbstractImagePrototype lookup(String key) {
AbstractImagePrototype ret = null;
if (lookupCache == null) {
lookupCache = new HashMapString, AbstractImagePrototype();
} else {
ret = lookupCache.get(key);
if (ret != null) {
return ret;
}
}
if (UK.equals(key)) {
ret = this.UK();
lookupCache.put(key, ret);
} else if (...) {
...
}
return ret; // would return null if not found
}
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
Google Web Toolkit group.
To post to this group, send email to Google-Web-Toolkit@googlegroups.com
To unsubscribe from this group, send email to
google-web-toolkit+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/Google-Web-Toolkit?hl=en
-~--~~~~--~~--~--~---
