void View::zoom(double steps, int offset)
{
- const double cursor_offset = _offset + _scale * offset;
const double new_scale = max(min(_scale * pow(3.0/2.0, -steps),
MaxScale), MinScale);
- const double new_offset = cursor_offset - new_scale * offset;
- set_scale_offset(new_scale, new_offset);
+ set_zoom(new_scale, offset);
}
void View::zoom_fit()
set_scale_offset((right_time - left_time) / w, left_time);
}
+void View::zoom_one_to_one()
+{
+ using pv::data::SignalData;
+
+ const vector< shared_ptr<Signal> > sigs(
+ session().get_signals());
+
+ // Make a set of all the visible data objects
+ set< shared_ptr<SignalData> > visible_data;
+ BOOST_FOREACH(const shared_ptr<Signal> sig, sigs)
+ if (sig->enabled())
+ visible_data.insert(sig->data());
+
+ if (visible_data.empty())
+ return;
+
+ double samplerate = 0.0;
+ BOOST_FOREACH(const shared_ptr<SignalData> d, visible_data) {
+ assert(d);
+ samplerate = max(samplerate, d->samplerate());
+ }
+
+ if (samplerate == 0.0)
+ return;
+
+ assert(_viewport);
+ const int w = _viewport->width();
+ if (w <= 0)
+ return;
+
+ set_zoom(1.0 / samplerate, w / 2);
+}
+
void View::set_scale_offset(double scale, double offset)
{
_scale = scale;
offset = _offset / _scale;
}
+void View::set_zoom(double scale, int offset)
+{
+ const double cursor_offset = _offset + _scale * offset;
+ const double new_scale = max(min(scale, MaxScale), MinScale);
+ const double new_offset = cursor_offset - new_scale * offset;
+ set_scale_offset(new_scale, new_offset);
+}
+
void View::update_scroll()
{
assert(_viewport);