+void Viewport::paintEvent(QPaintEvent*)
+{
+ vector< shared_ptr<RowItem> > row_items(view_.list_by_type<RowItem>());
+ assert(none_of(row_items.begin(), row_items.end(),
+ [](const shared_ptr<RowItem> &r) { return !r; }));
+
+ stable_sort(row_items.begin(), row_items.end(),
+ [](const shared_ptr<RowItem> &a, const shared_ptr<RowItem> &b) {
+ return a->point(QRect()).y() < b->point(QRect()).y(); });
+
+ const vector< shared_ptr<TimeItem> > time_items(view_.time_items());
+ assert(none_of(time_items.begin(), time_items.end(),
+ [](const shared_ptr<TimeItem> &t) { return !t; }));
+
+ QPainter p(this);
+ p.setRenderHint(QPainter::Antialiasing);
+
+ const ViewItemPaintParams pp(rect(), view_.scale(), view_.offset());
+
+ for (const shared_ptr<TimeItem> t : time_items)
+ t->paint_back(p, pp);
+ for (const shared_ptr<RowItem> r : row_items)
+ r->paint_back(p, pp);
+
+ for (const shared_ptr<TimeItem> t : time_items)
+ t->paint_mid(p, pp);
+ for (const shared_ptr<RowItem> r : row_items)
+ r->paint_mid(p, pp);
+
+ for (const shared_ptr<RowItem> r : row_items)
+ r->paint_fore(p, pp);
+
+ p.setRenderHint(QPainter::Antialiasing, false);
+ for (const shared_ptr<TimeItem> t : time_items)
+ t->paint_fore(p, pp);
+
+ p.end();
+}
+
+void Viewport::mouseDoubleClickEvent(QMouseEvent *event)
+{
+ assert(event);
+
+ if (event->buttons() & Qt::LeftButton)
+ view_.zoom(2.0, event->x());
+ else if (event->buttons() & Qt::RightButton)
+ view_.zoom(-2.0, event->x());
+}
+
+void Viewport::wheelEvent(QWheelEvent *e)