Daniel Bixby created BATIK-1326:
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Summary: 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
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.
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());
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