int
Cam_int::zoom2(
CEvent &e,
State *&
)
{
if (debug_fsa)
cerr << "Cam_int::zoom2"
<< endl;
DEVice_2d *ptr = (DEVice_2d *)e._d;
CAMptr cam (e.view()->cam());
PIXEL curpt (ptr->cur());
XYpt startpt(_start_pix);
int w,h; e.view()->get_size(w,h);
double zoom_factor = 1 + Sign(ptr->delta()[0]) *
(PIXEL(ptr->cur())-PIXEL(ptr->old())).length()/(w/4);
cam->set_zoom(cam->zoom() * zoom_factor);
cam->set_min (cam->min() + NDCvec(XYpt(_start_pix) - startpt));
ptr->set_cur(curpt);
cam->data()->changed();
return 0;
}
int
FilmTrans::move(
CEvent &e,
State *&
)
{
DEVice_2d* ptr = dynamic_cast<DEVice_2d*>(e._d);
assert(ptr);
if (_obj) {
Wpt cur(Wpt(ptr->cur(),_down_pt));
Wpt old(Wpt(ptr->old(),_down_pt));
_obj->mult_by(Wtransf::translation(cur-old));
if (_call_xform_obs)
XFORMobs::notify_xform_obs(_obj, XFORMobs::MIDDLE);
}
return 0;
}