Yes, that works. Knowing that BXMLSerializer needs no-arg constructors is
helpful.
Thanks,
Josh
On Thu, Apr 14, 2016 at 2:18 PM, Roger Whitcomb <roger.whitc...@actian.com>
wrote:
> So, the technical reason you go the error is that BXMLSerializer must be
> able to find a simple no-arg constructor for the class (in this case
> EnumList) in order to construct it, before adding data elements using the
> “add” method. There is no such constructor for EnumList (nor could there
> be, since it is a generic class and would need at least the class as a
> parameter in order to specialize it).
>
>
>
> So, one thing that comes to mind (and I haven’t tested it to see if works)
> would be to make a simple class of your own, that pretty much just “wraps”
> an EnumList<Paint.Color>. Not sure exactly how you would code it, but by
> providing a no-arg constructor and implementing the “List<?>” interface it
> should meet the requirements and be able to be used. So, presumably you
> could do something like this:
>
> public class ColorList extends EnumList<Paint.Color> {
>
> public ColorList() {
>
> super(Paint.Color.class);
>
> }
>
> }
>
> Then in your BXML file, use:
>
> <ListButton selectedItemKey="exteriorColor">
> <listData>
> <mypackage:ColorList/>
>
> </listData>
> </ListButton>
>
> Again, I haven’t tried this, but I **think** it should work (or something
> reasonably close to this).
>
>
>
> HTH,
>
> ~Roger
>
>
>
> *From:* Josh Highley [mailto:joshhigh...@gmail.com]
> *Sent:* Thursday, April 14, 2016 10:38 AM
> *To:* user@pivot.apache.org
> *Subject:* Re: Populate ListButton with enum data binding ?
>
>
>
> Yes, populating in Java is a last resort. Where possible, I've been
> trying to keep code like that out of the Java code. I'm converting a QT
> Jambi app, and all of the UI definition code in Java makes it a mess trying
> to find where functionality is actually implemented.
>
>
>
> At this point, my stacktrace isn't really valid since I don't know now to
> pass the required Class param to EnumList. Another path I may explore is
> using ArrayList and passing the Paint.Color.values() array -- I'm not sure
> if there's a way to do this in bxml....
>
>
>
> Thanks,
>
>
>
> Josh
>
>
>
>
>
> On Thu, Apr 14, 2016 at 12:20 PM, Roger and Beth Whitcomb <
> rogerandb...@rbwhitcomb.com> wrote:
>
> That is a really good question, Josh. My first thought is that you will
> probably have to populate the list in Java code. My second thought is to
> poke through the BXMLSerializer code to see it I can figure it out. But,
> what was the complete stack trace of the SerializationException (i.e., the
> cause). That could point the way to a solution. But, at the moment I
> don't know the answer.
>
> Thanks,
> ~Roger
>
>
>
> On 4/13/16 11:26 AM, Josh Highley wrote:
>
> I'm having an issue doing data binding with bxml. My app has a Dialog
> with a Form that shows a lot of editable fields for an object. Using
> form.load(new BeanAdapter(myObject)) is working for most of the fields
> (TextInput and Checkbox) but I'm having trouble with ListButton. I want to
> populate the listData with values from an enum and then set the selected
> item from a myObject value. I can't figure out how to specify the enum for
> the list data in the bxml. I think I'm close:
>
> (simplified example to mirror actual app)
>
> public class Paint {
> public enum Color { RED, BLUE, GREEN }
> }
>
> public class Car {
> private Paint.Color color;
>
> public Paint.Color getExteriorColor() { return color; }
> public void setExteriorColor(Paint.Color color) { this.color = color; }
> }
>
> <ListButton selectedItemKey="exteriorColor">
> <listData>
> <collections:EnumList>
> <!-- how do I specify constructor parameter Paint.Color class here?
> -->
> </collections:EnumList>
> </listData>
> </ListButton>
>
>
> I tried 'enumClass' as an attribute of <EnumList> and a child element, but
> I always get an "org.apache.pivot.serialization.SerializationException" on
> the line with <collections:EnumList>
>
>
> Thanks,
>
> Josh
>
>
>
>
>
