Re: [xmlvm-users] Define the layerClass on UIView

[Arno P. <ar...@pu...>]

well, short answer: we don't support that scenario yet.

What you could do: you can inject code on class level using advisor.xml. 
You can use that to inject an Objective-C category that adds a new 
method to the generated wrapper class. A bit of a kludge, but might 
solve your problem for now.

Arno


On 6/25/12 2:32 PM, Mickael Barbeaux wrote:
> Hi Arno,
>
> Thanks for your really quick answer ! :)
>
> I've just taken a look at what you suggested. But I don't think this
> corresponds to what I'm looking for...
> I'll be more specific.
>
> If I did understand correctly what does the Advisor, it will add a new
> method inside the UIView java class (let's call it "layerClass") and a
> native implementation inside org_xmlvm_ios_UIView.m from the code I'll
> put inside advisor.xml. I deduced it from what did the toString() method
> added inside NSString in advisor.xml :
>
> <class name="NSString">
>          <injected-method name="toString" modifier="public">
>              <signature>
>                  <return type="String"/>
>              </signature>
>              <code language="c" mode="replace">
>                  <![CDATA[
> 	return fromNSString(((org_xmlvm_ios_NSObject*) me)->fields.org_xmlvm_ios_NSObject.wrappedObj);
> ]]>
>              </code>
>          </injected-method>
>      </class>
>
> This adds the method inside "NSString.java" :
>
> /*
> * Injected methods
> */
> public String toString(){
> throw new RuntimeException("Stub");
> }
>
>   and "org_xmlvm_ios_NSString.m" :
>
> JAVA_OBJECT org_xmlvm_ios_NSString_toString__(JAVA_OBJECT me)
> {
>      //XMLVM_BEGIN_WRAPPER[org_xmlvm_ios_NSString_toString__]
>
>                  return fromNSString(((org_xmlvm_ios_NSObject*)
> me)->fields.org_xmlvm_ios_NSObject.wrappedObj);
>      //XMLVM_END_WRAPPER
> }
>
>
> That's great, but not what I'm looking for.
> What I want to do is add a class method inside the underlying
> UIViewWrapper ObjC class.
>  From what I'm understanding of it, UIViewWrapper is a generated ObjC
> class, extending UIView, and adding methods for managing delegated
> methods such as touch events, etc :
>
> Inside "org_xmlvm_ios_UIView.h" :
>
> @interface UIViewWrapper : UIView
>
> // Append the wrapper method declarations defined in the class Macro
> XMLVM_OBJC_OVERRIDE_CLASS_DECLARATIONS_org_xmlvm_ios_UIView
>
> @end
>
> Inside "org_xmlvm_ios_UIView.m" :
>
> @implementation UIViewWrapper
>
> // Append the wrapper methods defined in the class Macro
> XMLVM_OBJC_OVERRIDE_CLASS_DEFINITIONS_org_xmlvm_ios_UIView
>
> @end
>
>
> What I need is to be able to add a class method inside UIViewWrapper, so
> that it looks like something like this :
>
> @implementation UIViewWrapper
>
> // Append the wrapper methods defined in the class Macro
> XMLVM_OBJC_OVERRIDE_CLASS_DEFINITIONS_org_xmlvm_ios_UIView
>
> + (Class) layerClass {
>      return [CAEAGLLayer class];
> }
>
> @end
>
>
> Having generated this method for the "org_xmlvm_ios_UIView" class won't
> solve my problem, since the method needs to be generated on the
> UIViewWrapper class.
> Maybe is it more clear now... :)
>
> Mickael
>
>
> 2012/6/25 Arno Puder <ar...@pu... <mailto:ar...@pu...>>
>
>
>     checkout trunk/crossmobile, then look for a file called advisor.xml. In
>     that file do a grep on "toString". This is an example on how a method
>     toString() is injected to class NSString. You should be able to do the
>     same for a method called layerClass. Once you have done that, do a "ant
>     gen-xmlvm-ios" in crossmobile. This will re-generate the iOS API in
>     ../xmlvm. For this to work you need to point property sdk.path in
>     xmlvm.properties to an installation of the iOS 4.3 SDK (note that
>     crossmobile cannot deal with 5.* API yet).
>
>     Arno
>
>
>     On 6/25/12 11:53 AM, Mickael Barbeaux wrote:
>      > Hi everyone,
>      >
>      > I recently switched to the new C iOS API backend, and it really
>     works well !
>      > I'm currently working at implementing an OpenGLES 2.0 interface for
>      > developing my own custom game renderer, based on what was done
>     before on
>      > the old C API backend.
>      >
>      > My main concern is about the way to define the layer class on a
>     UIView.
>      > As you may know, I order to use an OpenGLES 2.0 renderer inside a
>      > UIView, Apple recommend to add this method inside your UIView
>     subclass :
>      >
>      > + (Class) layerClass
>      >
>      > {
>      >
>      >      return [CAEAGLLayer class];
>      >
>      > }
>      >
>      >
>      > But how to reach the same effect using XMLVM ?
>      > It seems that the UIView implementation is based on a ObjC
>     wrapper class
>      > (UIViewWrapper), but it is generated by XMLVM at XCode project
>      > generation, and it seems I have no way to modify it.
>      > As the method to implement is "static" (class method), I didn't
>     find a
>      > way to "override" it inside my UIView java subclass. Using a delegate
>      > method won't help either.
>      >
>      > How can I process to achieve what I want to do ?
>      > Should I do the same way as for the old C iOS API, that's to say
>      > duplicate the UIView class and create a UIViewGL class with specific
>      > implementation using the CAEAGLLayer class ? But then, how can I
>     add the
>      > "layerClass" inside the wrapper implementation, as it is now
>     generated
>      > automatically by the new iOS API ?
>      >
>      > Mickael
>      >
>      >
>      >
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