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https://issues.apache.org/jira/browse/BATIK-1326?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Daniel Bixby updated BATIK-1326:
--------------------------------
Description:
For a given SVG Element, initially transform = translate ({*}X{*}, {*}Y{*}).
Querying the SVG matrix values shows that A-E are as expected (1.0, 0.0, 0.0,
1.0, and {*}X{*}). The value for F, however does not match Y in the transform
attribute.
Setting the transform attribute directly - via setAttribute() in UpdateManagers
thread - does correctly affects the object on the screen. Later querying of the
transform attribute also reflects what was set. However, queries of the SVG
matrix show while the A-E values update to reflect what is in the transform
attribute, F never appears to update. This applies whether the transform is set
to “translate(x,y)” or “matrix(a,b,c,d,e,f)”.
Ideally the SVG Matrix could be referenced throughout the life of the code
(versus string-parsing through the transform attribute); however F cannot
currently be used to calculate y-displacements (since the initial value is off).
+*General pseudo-Snippet:*+
Element anElement = myDocument.getElementById(myName);
SVGLocatable locObj = (SVGLocatable) anElement;
SVGElement aParent = (SVGElement) findParent (anElem);
SVGMatrix aMatrix = locObj.getTransformToElement(aParent);
print(aMatrix.getA(), aMatrix.getB(), ... aMatrix.getF());
was:
For a given SVG Element, initially transform = translate ({*}X{*}, {*}Y{*}).
Querying the SVG matrix values shows that A-E are as expected (1.0, 0.0, 0.0,
1.0, and {*}X{*}). The value for F, however does not match Y in the transform
attribute.
Setting the transform attribute directly - via setAttribute() in UpdateManagers
thread - does correctly affects the object on the screen. Later querying of the
transform attribute also reflects what was set. However, queries of the SVG
matrix show while the A-E values update to reflect what is in the transform
attribute, F never appears to update. This applies whether the transform is set
to “translate(x,y)” or “matrix(a,b,c,d,e,f)”.
Ideally the SVG Matrix could be referenced throughout the life of the code
(versus string-parsing through the transform attribute); however F cannot
currently be used to calculate y-displacements (since it never updates).
+*General pseudo-Snippet:*+
Element anElement = myDocument.getElementById(myName);
SVGLocatable locObj = (SVGLocatable) anElement;
SVGElement aParent = (SVGElement) findParent (anElem);
SVGMatrix aMatrix = locObj.getTransformToElement(aParent);
print(aMatrix.getA(), aMatrix.getB(), ... aMatrix.getF());
> SVGMatrix getF() doesn't reflect transform attribute
> ----------------------------------------------------
>
> Key: BATIK-1326
> URL: https://issues.apache.org/jira/browse/BATIK-1326
> Project: Batik
> Issue Type: Bug
> Components: SVG DOM
> Affects Versions: 1.14
> Environment: RHEL 7.9
> Reporter: Daniel Bixby
> Priority: Major
>
> For a given SVG Element, initially transform = translate ({*}X{*}, {*}Y{*}).
> Querying the SVG matrix values shows that A-E are as expected (1.0, 0.0, 0.0,
> 1.0, and {*}X{*}). The value for F, however does not match Y in the transform
> attribute.
> Setting the transform attribute directly - via setAttribute() in
> UpdateManagers thread - does correctly affects the object on the screen.
> Later querying of the transform attribute also reflects what was set.
> However, queries of the SVG matrix show while the A-E values update to
> reflect what is in the transform attribute, F never appears to update. This
> applies whether the transform is set to “translate(x,y)” or
> “matrix(a,b,c,d,e,f)”.
> Ideally the SVG Matrix could be referenced throughout the life of the code
> (versus string-parsing through the transform attribute); however F cannot
> currently be used to calculate y-displacements (since the initial value is
> off).
> +*General pseudo-Snippet:*+
> Element anElement = myDocument.getElementById(myName);
> SVGLocatable locObj = (SVGLocatable) anElement;
> SVGElement aParent = (SVGElement) findParent (anElem);
> SVGMatrix aMatrix = locObj.getTransformToElement(aParent);
> print(aMatrix.getA(), aMatrix.getB(), ... aMatrix.getF());
>
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