HI, i was wondering if there is an equivalent to the emacscript commands detailed following, within Batik Java:
var trans = document.documentElement.currentTranslate; var scale = document.documentElement.currentScale;
I cannot seem to find them. I am programming drag routines for SVG elements, and want to make them relative to the actual zoom and pan state. I have made this using emacscript but i want this inside the Java application instead of the SVG file.
Yes, there are equiv of the above from the Java Binding:
SVGDocument doc = ....; SVGSVGElement root = doc.getRootElement(); float scale = root.getCurrentScale(); SVGPoint trans = root.getCurrentTranslate();
However what you probably want to use is:
SVGLocatable elem = ...; SVGPoint pt = ... SVGMatrix mat = elem.getScreenCTM(); // elem -> screen mat = mat.inverse(); // screen -> elem pt = pt.matrixTransform(pt); // from screen coords->elem
This should also be available in ECMA script (and is with Batik, but isn't with ASV 3.0 - don't know about 6.0 - I suspect it has it).
This will deal with any intervening transforms (viewbox, transform, etc). Elem can be just about any 'graphical' element (rect, g, svg, ...).
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