I don't see an example in the 1.5 sources called samples/tests/spec/scripting/text_content.svg . I do have a directory called text_content however.
The file was added after 1.5 was released.
Here is a java method that I wrote, but it doesn't work when the image has been zoomed: (I want to do a drawRect of the boundingBox of the element I clicked on)
I use essentially exactly the code below when I want to map events to an elements coordinate system.
SVGPoint getLocationOnElement(SVGDocument document, SVGLocatable elem, org.w3c.dom.events.MouseEvent me) {
SVGMatrix mat = elem.getScreenCTM(); SVGMatrix imat = mat.inverse(); // Go from screen to elem SVGPoint pt = document.getRootElement().createSVGPoint(); pt.setX(me.getClientX()); pt.setY(me.getClientY()); pt = pt.matrixTransform(imat);
return pt; }
Where is the point in relation to the element? Is it a corner of a bounding
box, or the center of the element?
The code above maps the location of the users click from screen pixels to the coordinate system of 'elem'. If you want to point in screen coordinates (which is what swing uses) just use me.getClientX/Y.
So the point is relative to where the user clicked on the element in the coordinate system of the element.
For now I want to just click and draw the box, but ultimately, my goal is to draw a rubber band rectangle on the screen at any zoom factor, and determine what elements are contained/intersected by the rectangle.
Your help is greatly appreciated, thanks!
----- Original Message ----- From: "Thomas DeWeese" <[EMAIL PROTECTED]>
To: "Batik Users" <[EMAIL PROTECTED]>
Sent: Sunday, December 14, 2003 6:05 PM
Subject: Re: Still sttruggling with scaled/zoomed document
Ron King wrote:
Could someone please tell me how to get a correct bbox from a zoomed document?
Hi Ron, You would probably find samples/tests/spec/scripting/text_content.svg useful.
This makes use of getTransformToElement to transform the bbox points to another elements coordinate system. You probably want to use getScreenCTM which gives the transform to the 'screen' coordinate system, but other than getting a different transform the point manipulation code is the same.
> I'm making a Batik based paint program, and I'm having some success. > I can draw a rubber band rectangle around a part of the document, > and then select all elements inside the rectangle. However, if I > have zoomed the document to get to the finer details, I can't figure > out how to capture the proper coordinates any more. > > When testing, I use getbbox to draw a rectangle around one element. > I can do this before I zoom, but after I have zoomed the box comes > up in the wrong location. I have seen people on the list discuss the > getbbox problem, but I haven't seen a straight-forward source code > solution presented.
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