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From: "andrewgirow" <andrewgirow@yahoo.com>
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Date: Wed, 01 Sep 2004 15:00:04 -0000
Subject: [SVG-Mobile] SVG Tiny 1.2 DOM Feedback and Questions
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While checking/ implementing SVG Tiny 1.2 DOM
 I got several questions:

1. THE COLOR TRAITS
In the A.2.6 Attribute and Property Access is written "Trait is the=20
typed value (e.g., a number, not just a string) that gets assigned=20
through an XML attribute"

The set trait for color uses two functions instead of one:=20

setRGBColorTrait [null | SVGRGBColor]
setTrait(none | currentColor | inherit)

I see here a problem for application programmers who are not experts=20
in SVG. Why there are two functions for the same type?=20

The get trait for color uses just one function: getRGBColorTrait.
So, there is no way to know that the given PathElement, for example,=20
uses the `currentColor' of the parent GroupElement.=20

The get trait also does not allow to know that the PathElement fill=20
attribute is inherited from the parent GroupElement.=20

If the getRGBColorTrait returns null. What it is suppose to mean:=20
none, currentColor or inherit?

The set and get traits must be consistent. If the program sets the=20
fill attribute to `currentColor' it must be a way later on to check=20
if this attribute equals to the `currentColor'.=20=20
As I understand the whole idea behind traits is to provide strongly=20
typed access to SVG attributes. In a case of color we have two types=20
instead of one!

2. SVGSVGElement

In the SVGSVGElement there is a new attribute that could not be found=20
in the previous versions of SVG DOM.=20

attribute float currentRotate; // raises (DOMException) on setting

The question is how this parameter applied to the current=20
transformation matrix?
Does it go after the currentTranslate of before? What are the order=20
of operations now for the current transform? Do we need this at all?=20
I mean that there is no explanation why it is in the DOM now.

3. Fixed Points vs Float Points=20
Most mobile devices on the market use CLDC Java that does not have=20
floating point numbers. What do you think about to have also the same=20
SVG Tiny 1.2 DOM API with fixed-point numbers?=20


That's all for now I will keep checking=85.;)
Andrew Girow
www.tinyline.com


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