- const pair<Cursor, Cursor> &c = _view.cursors();
- const float x1 = (c.first.time() - _view.offset()) / _view.scale();
- const float x2 = (c.second.time() - _view.offset()) / _view.scale();
- const int l = (int)max(min(x1, x2), 0.0f);
- const int r = (int)min(max(x1, x2), (float)width());
-
- p.drawRect(l, 0, r - l, height());
+ if (event->orientation() == Qt::Vertical) {
+ // Vertical scrolling is interpreted as zooming in/out
+ _view.zoom(event->delta() / 120, event->x());
+ } else if (event->orientation() == Qt::Horizontal) {
+ // Horizontal scrolling is interpreted as moving left/right
+ _view.set_scale_offset(_view.scale(),
+ event->delta() * _view.scale()
+ + _view.offset());
+ }