void main_window_t::wheelEvent(QWheelEvent * e)
{
double old_zoom = zoom_;
int delta = e->delta() / 8 / 15;
if (delta > 0)
{
for (int i = 0; i != delta; ++i)
zoom_ *= 1.1;
}
else if (delta < 0)
{
for (int i = 0; i != delta; --i)
zoom_ /= 1.1;
}
point_2f pos(e->pos().x(), e->pos().y());
point_2f sz(size().width() / 2, size().height() / 2);
vector_2f diff = pos - sz;
center_ += (old_zoom - zoom_) * vector_2f(diff.x, -diff.y);
center_ = limit(center_);
e->accept();
viewer_->on_move(limit(screen_to_global(e->pos())));
resize_impl(size().width(), size().height());
updateGL();
}
void print(cg::visualization::printer_type & p) const
{
p.corner_stream() << "double-click to clear." << cg::visualization::endl
<< "press mouse rbutton for add vertex (click to first point to complete contour)" << cg::visualization::endl
<< "move vertex with rbutton" << cg::visualization::endl
<< "eps:" << eps << cg::visualization::endl;
for (size_t i = 0; i < points_.size(); ++i)
{
p.global_stream((point_2f)points_[i] + vector_2f(5, 0)) << i;
}
}
void main_window_t::resize_impl(int screen_w, int screen_h)
{
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
vector_2f size = (zoom_ / 2) * vector_2f(screen_w, screen_h);
point_2f left_bottom = center_ + (-size);
point_2f right_top = center_ + size;
glOrtho(left_bottom.x, right_top.x, left_bottom.y, right_top.y, -1.0, 1.0);
glViewport(0, 0, screen_w, screen_h);
}
void print(cg::visualization::printer_type & p) const
{
p.corner_stream() << "double-click to clear." << cg::visualization::endl
<< "press mouse rbutton for add vertex (click to first point to complete contour)" << cg::visualization::endl
<< "move vertex with rbutton" << cg::visualization::endl
<< "yellow contour -- not ccw or convex" << cg::visualization::endl
<< "green contour -- contains cursor" << cg::visualization::endl
<< "red contour -- don't contains cursor" << cg::visualization::endl;
for (size_t i = 0; i < points_.size(); ++i)
{
p.global_stream((point_2f)points_[i] + vector_2f(5, 0)) << i;
}
}