I didn't realize you could just instantiate an embedded image and get a Bitmap 
object, so I assumed titleIcon was a custom 'factory' class, sort of the way 
item renderers are used. My mistake, and you can safely ignore my previous 
message.

On 2021/10/18 09:41:17, Greg Dove <[email protected]> wrote: 
> What I meant was that it is populated from embedded assets.
> 
> titleIcon="@Embed(etc...
> 
> That approach, or 'binding' to an embedded Class const.
> 
> So I don't understand the difference you expressed for titleIcon, because
> this is exactly the scenario I was meaning where class typing would
> typically be a string url in royale instead... this is a quick reply, hope
> it makes sense.
> 
> Greg
> Sent from my phone
> 
> 
> 
> On Mon, 18 Oct 2021, 8:01 pm Yishay Weiss, <[email protected]> wrote:
> 
> > I'm convinced there's no point in allowing a mismatch.
> >
> > I just looked at the flex source for Panel.titleIcon and it looks like
> > it's more a factory class than an embedded asset class. It's used like this
> >
> >             if (_titleIcon)
> >             {
> >                 titleIconObject = new _titleIcon();
> >                 titleBar.addChild(DisplayObject(titleIconObject));
> >             }
> >
> > So I think we should just stick to the Flex way in this case.
> >
> > Re Container.icon I think using Object is a good idea.
> >
> > On 2021/10/17 20:36:48, Greg Dove <[email protected]> wrote:
> > > IMO it doesn't make sense to create support for mismatched accessor
> > types.
> > > This could technically be supported in javascript, but has always been a
> > > compiler error for actionscript, and I suspect a runtime error if
> > bytecode
> > > was generated to attempt it for swf.
> > >
> > > Basically actionscript 3 as a language does not allow different typing
> > for
> > > getter and setter. Because javascript is untyped, it is technically
> > > possible at that implementation level, but it would be unusual I think to
> > > try to have it possible at actionscript level. This mismatch is now
> > > possible with Typescript (which only targets javascript), however it was
> > > only added this year, it was not the case prior to that, afaik.
> > >
> > > The issue I think that we need to consider is whether we want 'Class'
> > > typing here at all. If the majority of the use here is with Embedded
> > > assets, and if those don't work, we need to decide a) Is it important to
> > > find a way to make Embedded Assets work that create a 'Class' for each
> > > embedded asset, similar to legacy Flex compiler (but likely as base64
> > data
> > > for js) or b) Do we switch to Strings (asset url) only in each case or c)
> > > Is there scope for some compact data format that 'profiles' the asset
> > (via
> > > some image java lib) providing pre-load data like width and height as
> > well
> > > as the string url which gives some sort of immediate layout/measure
> > support
> > > before the asset is loaded or d) other ideas....
> > >
> > > For icon/titleIcon properties etc, what I'd suggest is that typing the
> > > accessors as Object instead of Class allows the possibility for any of
> > > the above options because the variations could be supported in the
> > setter.
> > > And for most porting of Embedded assets it (currently) involves switching
> > > them to String urls, so that would IMO be the best option for now, but I
> > am
> > > keen to hear what others think.
> > >
> > > My 2 cents
> > > Greg
> > >
> > >
> > >
> > >
> > > On Mon, Oct 18, 2021 at 1:26 AM Yishay Weiss <[email protected]> wrote:
> > >
> > > > As a compromise it may be useful to be able to have the setter receive
> > an
> > > > Object and the getter return a Class, which is actually an Object (and
> > > > typically a String), while annotating with ignore coercion. I think we
> > > > would have a type mismatch issue though, so I wonder if there's a way
> > > > around that in the compiler. Anyone know?
> > > >
> > > > On 2021/10/17 12:16:28, Yishay Weiss <[email protected]> wrote:
> > > > > Container.icon is Class, which is good in Flex for embedded images,
> > but
> > > > AFAIK not useful for Royale. Do you guys think we should change the
> > type to
> > > > a String at the risk of creating some compile time errors?
> > > > >
> > > >
> > >
> >
> 

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