void rotate(final int xNew, final int yNew) {
if (content == null || content.isLocked()) return;
final int dx = xNew - xLast;
final int dy = yNew - yLast;
aaX.set(axisPerDx, dx * anglePerPix);
aaY.set(axisPerDy, dy * anglePerPix);
transX.set(aaX);
transY.set(aaY);
rotateTG.getTransform(rotateOld);
rotateNew.set(transl_inv);
rotateNew.mul(transY);
rotateNew.mul(transX);
rotateNew.mul(transl);
rotateNew.mul(rotateOld);
rotateTG.setTransform(rotateNew);
xLast = xNew;
yLast = yNew;
transformChanged(BehaviorCallback.ROTATE, rotateNew);
}
void translate(final int xNew, final int yNew) {
if (content == null || content.isLocked()) return;
final int dx = xNew - xLast;
final int dy = yNew - yLast;
translateTG.getTransform(translateOld);
v1.scale(dx, translationPerDx);
v2.scale(-dy, translationPerDy);
translation.add(v1, v2);
translateNew.set(translation);
translateNew.mul(translateOld);
translateTG.setTransform(translateNew);
transformChanged(BehaviorCallback.TRANSLATE, translateNew);
xLast = xNew;
yLast = yNew;
}