svg translate 操作

		function dragElement(evt) {

            var target = evt.target;

            var id = target.id;

            var dx = evt.dx, dy = evt.dy;

            var scale = svgcanvas.scale();

            var transformBaseVal = target.transform.baseVal;

            if(transformBaseVal.numberOfItems == 0){

                var transformObject = svgRoot.createSVGTransform();

                transformBaseVal.appendItem(transformObject);

            }

            var transformItem = transformBaseVal.getItem(0);

            var transformMatrix = transformItem.matrix;

            var ox = transformMatrix.e, oy = transformMatrix.f;

            var x = ox + dx / scale, y = oy + dy / scale;

            log("scale:" + scale + ",offset:" + dx / scale + "," + dy / scale);

            transformItem.setTranslate(x,y);

        }

	}
巴特西

svg translate 操作

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