SigView::SigView(SigSession &session, QWidget *parent) :
QGLWidget(parent),
_session(session),
- _scale(1000000000ULL),
+ _scale(1e-6),
_offset(0)
{
connect(&_session, SIGNAL(dataUpdated()),
{
assert(event);
+ const double cursor_offset = _offset + _scale * (double)event->x();
+
switch(event->button())
{
case Qt::LeftButton:
- _scale = (_scale * 2) / 3;
+ _scale *= 2.0 / 3.0;
break;
case Qt::RightButton:
- _scale = (_scale * 3) / 2;
+ _scale *= 3.0 / 2.0;
break;
}
+ _offset = cursor_offset - _scale * (double)event->x();
+
updateGL();
}